变桨系统维护
金风1.5机组变桨系统
实用标准变桨系统主要元件故障原因及分析——AC2和NG5故障原因及分析******专业：电力系统自动化入职时间：2010-7-1部门：技术服务中心目录目录 (1)摘要 (2)一、变桨系统的作用 (2)（一）功率调节 (2)（二）气动刹车 (3)二、主要元器件的介绍 (3)（一）变桨逆变器AC2 (3)（二）充电器NG5 (4)（三）其他元器件 (6)三、控制原理 (8)（一）变桨原理框图 (8)（二）变桨原理介绍 (8)四、典型故障分析 (9)（一）变桨逆变器OK信号丢失故障分析 (9)1、变桨逆变器OK信号形成及检测过程 (10)2、变桨逆变器OK信号丢失原因 (10)（二）充电器NG5损坏原因分析及整改建议 (12)1、NG5充电器损坏原因 (13)2、整改意见 (15)五、结束语 (19)参考文献： (20)摘要本文通过对变桨系统的重要元器件的原理和变桨控制原理进行了简单的介绍，总结了充电器NG5和逆变器AC2发生故障的原因和解决方法，并且提出本人在现场进行维护工作时发现的一些缺陷和整改意见。
关键词：变桨系统逆变器AC2 充电器NG5 浪涌保护一、变桨系统的作用（一）功率调节变桨距控制是最常见的控制风力发电机组吸收风能的方法，变桨目的是通过控制桨距角，调节叶轮吸收风能的功率。
在额定风速以下时，风力发电机组应该尽可能的捕捉较多的风能，桨距角设定值设定在能够吸收最大功率的最优值，所以这时机组运行没有必要改变将距角，一般桨距角设定为零度附近，以便让叶轮尽可能多的吸收风能，此时空气动力载荷通常比在额定风速之上时小。
额定风速以上阶段变速控制器和变桨控制器共同作用，通过变速控制器即控制发电机的扭矩使其恒定，从而恒定功率；通过变桨调节发电机转速，使其始终跟踪发电机转速的设定值。
（二）气动刹车金风1500kW风力发电机组变桨系统是目前该系统唯一的停车机制，通过将桨叶迅速顺至停机位置来完成气动刹车。
主控的所有停机指令，包括普通停机，快速停机和紧急停机，最后都是通过总线发给变桨系统来执行。
变桨系统.操作和维护手册.英文
Operating and maintenance manualCustomer:MingyangWindpower Technology Co.Ltd.Daling Precinct Zhongshan TorcPRC GuangdongManufacturer:SSB-Antriebstechnik GmbH&Co.KGNeuenkirchener Str.13D-48499SalzbergenGermanyOrder No.:2061401620614151Machine:Pitch-System for1.5MW wind energyturbineYear of manufacture:2007Index Index (2)1Safety-General information (4)1.1Terminology Definition (5)1.1.1Qualified personnel (5)1.2Transport and storage (7)1.2.1Transport regulations (7)1.2.2Storage of SSB Pitch Systems (8)2Pitch system layout (9)2.1Main pitch ctrl.cabinet (10)2.2Axis cabinets (11)2.3Battery cabinets (11)2.4Electric pitch motors (12)2.5Pre-installed cables (12)3Mechanical dimension drawings (13)3.1Main pitch control cabinet (13)3.2Axis cabinet (14)3.3Battery cabinet (15)3.4Pinion encoder blade bearing (16)4Commissioning (17)4.1Installation of the components (17)4.2Mounting the switch cabinets (17)4.3Installation of the pitch motor (18)4.4Connecting the cables (18)5Manual Operation (19)5.1General information motion controller GEL8230Y001 (19)5.2Characteristic motion controller (20)5.2.1The key pad (21)5.2.2The display (22)5.2.3Menu structure (23)5.2.2.1Main window(Axis) (24)5.2.2.2Main window(I/O) (26)5.2.2.3Main menu (27)5.2.2.4Device information (27)5.2.2.5Stored failures (28)5.3Homing routine axis/blade (29)6Maintenance (30)General (30)6.1Regular maintenance (31)6.1.1Switch cabinets general (31)6.2Recommendation for preventive maintenance (31)6.2.1Disassembling of the battery cases (33)6.3Disassembly of defective devices (34)6.3.1Exchange of the DGNR speed controller (34)6.3.2Exchange of L&B motion controller (35)6.3.2.1Read current parameter set of motion controller (35)6.3.2.2Disassembly/assembly motion controller (38)6.3.2.3Write parameter to motion controller (40)6.3.3Exchange of damaged cables (41)6.4Recommended spare parts (42)6.4.1Axis cabinet (42)6.4.2Main pitch control cabinet (44)6.4.3Battery cabinet (46)Symbols usedWarning A warning contains information which is important for the prevention of dangers.Caution A section marked with"Caution“contains information which is important for the prevention of damage to the system or to accessories.Note A note contains information about the correct operation of the product.1Safety -General informationFor electrical equipment for use in electrical power installations.This information sheet,together with the warning notices,are a component part of the product-specific operating instructions and must be strictly observed for reasons ofsafety.DANGERThese electric machines or devices are equipmentfor use in industrial power installations.During operation thisequipment has concealed,dangerous,live bare-metal parts,and possibly also moving or rotating parts.They could therefore,e.g.in case of impermissible removal of the required covers,improper use,incorrect operation or insufficient maintenance,cause extremely serious injuries or damage.The person responsible for system safety must therefore ensure that:•Only qualified persons are entrusted with working on the machines or devices •These persons must,among other things,always have the operating instructions and other documents of the product documentation included with the system at their disposal at all times and must be obligated to consistently observe these documents •Work on the machines or devices,or nearby is prohibited for unqualified persons.Always note the following safety requirements andrecommendations before commissioning1.1Terminology Definition1.1.1Qualified personnelQualified persons are,due to their training,experience and instruction,as well as their knowledge of the pertinent standards,regulations,accident prevention regulations and operating conditions,have been authorized by the person responsible for system safety to carry out the respectively required activities,and can recognize and avoid possible dangers in the process(for definitions for specially-trained personnel,also see DIN VDE0105or IEC 364).In addition,knowledge of first-aid measures and the local rescue equipment is also required. For work on power installations,the prohibition of the use of unqualified persons is governed, for example,in DIN VDE0105or IEC364.WarningIt is assumed that the basic planning work for the system and all transport,assembly, installation,commissioning,maintenance and repair work will be carried out by qualified personnel and/or checked by responsible specially trained personnel.In the process,particular attention must be paid to the following:•The technical data and information on the permissible use(installation,connection, environmental and operating conditions),which are included in the catalog,the order documents,•The operating instructions,the rating plate information and the other product documentation•The general installation and safety regulations•The local,system-specific regulations and requirements•The appropriate use of tools,lifting and transport equipment•The use of personal safety equipment•Assembly conditions for devices which are delivered in accordance with IPOO (without covers)if necessary:During operation the required touch guards must beinstalled or a dangerous approach must be prevented.For clarity reasons,the operating instructions cannot contain all detailed information on possible design variants,and in particular cannot take every imaginable installation, operation or maintenance case into account.In accordance with this,the operating instructions mainly contain only those references which are required for qualified personnel (see above)in the case of appropriate use of the machines or devices in industrial application areas.If in special cases the requirements are more demanding when the machines or devices are intended for use in non-industrial areas(e.g.touch guards against children's fingers etc.),these conditions must be ensured during installation with additional protective measures on the system.In case of uncertainty here,in particular in the case of a lack of product-specific detailed information,the required clarifications must be obtained via the responsible SSB agency. Please always specify the machine or device model and serial number for this purpose.It is recommended that,for planning,assembly,commissioning and service tasks,the support and services of the responsible SSB agency be called upon.NoteTo prevent malfunctions,it is necessary to have the specified maintenance,inspection and revision measures carried out regularly by qualified personnel(see above).Changes compared to normal operation(increased power consumption,temperatures or vibrations,unusual noises or odors,actuation of the monitoring equipment etc.)indicate that operation is impaired.To prevent malfunctions which could cause direct or indirect serious injuries or damage,the responsible maintenance personnel must be informed immediately.IN CASE OF DOUBT,SWITCH OFF THE RELEVANT EQUIPMENT IMMEDIATELY!NoteIt is pointed out here that the content of the operating instructions and product documentation is not part of a previous or existing agreement,commitment or legal relationship,nor is it intended to change these in any way.All obligations for SSB result from the respective purchase contract,which also contains the complete and solely valid warranty conditions. These contractual warranty provisions shall be neither expanded nor restricted by the remarks of these instructions and documentation.NoteThe illustrations and pictures used in these instructions are for demonstration purposes and make no claim for reality.If the reader notices differences between the illustration or the picture and the version supplied(in relation to the individual components),an SSB agency should immediately be informed of this,in order to obtain clarification.If operating instructions for individual components are enclosed,they are always to be included as a supplement to the operating instructions at issue.The contents of the operating instructions for the relevant components are neither expanded nor replaced by the“Operating instructions for SSB Pitch Systems”.1.2Transport and storageCautionLifting tools has to be designed for the weight of the machine!In possible assembling or dismantling be careful of rope guide!A switch cabinet,which is not directly put into operation, has to be stored in a dry and vibration-free room.CautionAt housings of electrical devices temperatures up to100°C can occur depending upon load. Contact can cause burns and must be prevented.Also no temperature-sensitive components,e.g.normal cable or electronically parts,should lie close or has to be fastened at the housings.1.2.1Transport regulationsGeneralThis regulation describes the handling for the components manufactured by SSB(switch cabinets and electric motors)for the pitch system:The regulation is to be considered with each unloading and transportation procedure.The carrier is responsible to adhere the requirements of SSB and has to fulfill the legal regulation concerning the transportation lock and the transport insurance.Attention should be paid to:•Using a fork-lift truck the load has to be secured against overbalancing and slipping down from the pallet!•Transporting several switch cabinets on a pallet these are to be secured against slipping,because otherwise a damage of the housing can occurNoteStrong vibrations and hard impacts are to be avoided during transport as well as when lifting and setting down!1.2.2Storage of SSB Pitch SystemsGeneralThis regulation describes the correct storage of the components for the pitch system, manufactured by SSB:The storage contains:•the keeping of the SSB components up to the intended installation of the products into a wind energy plant•the keeping of the inserted components in a plant component up to the evacuation of the component to the building site.For the handling the transportation regulation is to be considered.The following items have to be considered:•The components that are not fitted must be stored in a closed hall•The hall temperature is to be maintained in the range of0°C to+40°C•During storage the relative humidity should be between0%and55%•In the case of temperatures lower than0°C care must be taken to ensure that the heating systems are in good working order so as to achieve an internal cabinet temperature of>0°C•Built-in battery packs are to be protected against discharging by regular trickle charging•During storage the components are to be protected against high humidity and water condensation inside the housing by suitable drying agents•Battery cabinets and pitch motors are not stackable•A maximum of up to3converter cabinets or3control cabinets can be stacked.When doing so,ensure that the external converter box heat sink is not damaged during storage•For protected transport,housing openings must be closed by plugs or adhesive tape and must also remain closed to prevent the ingress of foreign bodies •All housings must always remain closed during storage•The temporary corrosion protection of the unpainted fixing flange in pitch motors must be renewed at regular intervals.2Pitch system layoutThe pitch-system is placed inside the hub of the wind power plant.The scope of supply includes one main pitch ctrl.cabinet,three axis cabinets,three battery cabinets,three direct current electric motor,the required cable connections and the operating manuals.The pitch control system and speed control work together to maintain the rotor at constant power output.Wind gusts cause the rotor to accelerate,but subsequent adjustment of blade pitch smoothly reduces the speed once again.This leads to a significant reduction of the loads on the turbine while at the same time the power is supplied to the grid with a high level of compatibility.In order to maintain blade pitch in the event of grid loss or failures in the pitch power supply or control units,each rotor blade has its own battery back-up that rotates with the blade.In addition to controlling power output,the pitch mechanism serves as the primary safety/ brake system.Each blades pitch mechanism operates independently of the others.Thus in the event of a storm each blade can be moved to a safe position(feather position)to restore the rotor from abnormal situations to safe rotational speeds.Fig.2.1:plot of the pitch system layout2.1Main pitch ctrl.cabinetThe main pitch ctrl.cabinet is the interface between the axis cabinets in the hub and the top box,located in the machine house.The connection between the main pitch ctrl.cabinet and the top box is realized by slip ring. Via this slip ring the main pitch ctrl.cabinet is supplied with power and control signals from the top box.Additionally a Profibus-DP connection for the data exchange between the system management computer and the pitch controller is performed via slip ring.The positioning controller is mounted in the main pitch ctrl.cabinet and controls the positioning of the blades.In addition,the charging process of the back-up system(batteries) in the three battery cabinets is controlled by a central charging unit fitted in the main pitch ctrl.cabinet.Fig.2.2:Main pitch ctrl.cabinet2.2Axis cabinetsThere are three axis cabinets in the pitch system.One axis cabinet is allocated to each blade.The converter operates in4-quadrant mode to control the speed of the corresponding pitch motor.Fig.2.3:Axis cabinet2.3Battery cabinetsLike the axis cabinet,one battery cabinet is allocated to each axis.For the case of a power failure or a reset of the EFC-signal(Emergency Feather Control-signal)each blade will be separately moved to the feather position(limit switch).Fig.2.4:Battery cabinet2.4Electric pitch motorsThe electric pitch motors are direct current machines.Fig.2.5:Electric pitch motorDetailed information concerning the motor(technical data,maintenance etc.)is contained in the appropriate document“Operating instructions for SSB DC Motors Model:GHTIF-07200403.81”2.5Pre-installed cablesThe connection between the main pitch ctrl.cabinet and the top box is realized by slip ring. Via this slip ring the main pitch ctrl.cabinet is supplied with power and control signals from the top box.Additionally a Profibus-DP connection for the data exchange between the system management computer and the pitch controller is performed via slip ring.The connection between the main pitch ctrl.cabinet,the axis cabinet,the battery cabinets and the electric pitch motors is made by pre-installed cables.The delivered cables are coded to prevent an interchange between cables and cabinets.3Mechanical dimension drawings3.1Main pitch control cabinetFig.3.1:Dimension drawing main ctrl.cabinet3.2Axis cabinetFig.3.2:Dimension drawing axis cabinet3.3Battery cabinetFig.3.3:Dimension drawing battery cabinet3.4Pinion encoder blade bearingFig.3.4:Dimension drawing pinion encoder blade bearing4Commissioning4.1Installation of the componentsNoteThe installation of the components and the connecting cables should only be carried out by qualified personnel.WarningThe installation and the cable connection are only to be carried out if all power supplies are disconnected or switched off.The pitch system is to be disconnected from power supply until all components are correctly installed and connected to each other.The batteries for the emergency power supply are already installed.For this reason,the battery maintenance switch must be switched to“off”and only switched to“on”after all connections are made. Caution is needed if the battery cabinet is open and the batteries are interconnected,since there is a voltage of216VDC between positive and negative terminals.WarningThe installation of the pitch system must be carried out with great care.There is a risk of injury or death related to the great dead weight of the components as well as from pointed and sharp edges.Lifting and transporting must be carried out with suitable lifting and transporting equipment(see also Chapter1.2).4.2Mounting the switch cabinetsFig.4.1:Holding rail for the cabinetsFor installing the cabinets inside the hub,the switch cabinets have retaining brackets to which they can be attached with screws or bolts in frames designed for the purpose.When doing so,a firm fit must be ensured.The fastenings can become loose through vibrations in the hub during operation of the wind energy plant,so the screws or bolts must be secured against becoming loose independently.A dynamic suspension is recommended,to protect the cabinets against damage caused by the vibrations.4.3Installation of the pitch motorFig.4.2:Pitch motor4.4Connecting the cablesCautionDo not remove the coding of the plug pare the coding of the plugs with the coding on the cabinets.The inscriptions have to correspond.If the coding at the plug and cabinet is equal,but the inscriptions are different,please contact SSB.Mixing up connections can cause malfunctions in the pitch system and a damage of the plant.Fig.4.3:Connectors at the axis cabinet and the battery cabinetIf all components (cabinets and motors)are installed in the hub,the pre-wired cables can be connected.The plug system is marked and secured by coding pins.5Manual OperationWarningManually movement of the blades can present a risk for personnel and the wind energy plant if not carried out correctly.All essential safety precautions must be taken before a manual operation of the pitch system is undertaken.For this purpose,the appropriate operating instructions are to be consulted and the plant manufacturer’s safety measures are to be noted.WarningOnly one blade should be moved out of the parking position.Consequently,before moving a second blade,it must be ensured that the first blade is in parking position again.5.1General information motion controller GEL8230Y001The Motion Controller is intended exclusively for the control of rotor blade drives in a wind power plant.The three axes are equipped with a redundant encoder system.Encoder A:located at the motor shaftEncoder B:located at the blade bearingIn case of an invalid encoder signal it is possible to select the second encoder set.Control and nominal value preset are carried out by means of an attached field bus module (PROFIBUS-DP)using the specific communication protocol"LB2".The controller measures the motor currents of the three axes via current transducer connected to analog current inputs and three temperatures via analog PT100inputs,and provides averaged values.The values can be accessed via the LB2protocol(8bits)or converted and displayed as motor current in Ampere or as temperature in degrees Celsius respectively.A brief overview of the method of functioning and the operation of the controller is given here. The operator interface and the menu guidance are only for display and do not equate strictly to the supplied version in terms of the controller layout and software.NoteFor general information,safety instructions etc.or a detailed description of the controller, consult the supplied manual.5.2Characteristic motion controllerThe following sketch shows the principle of functioning of the control:Fig.5.1:Operating principle of the controllerFig.5.2:Principle axis controlGeneral information:Information in square brackets refers to the main system parameters for the corresponding blocksFor the actual value inputs/axes/nominal value outputs nos.2…6the same contents apply in principle as for no.1;differences occur with several factory settings and adjustable characteristicsFunction elements with grey background are,by default(from the factory),de-activated.5.2.1The key padFig.5.3:Keyboard1.Function keys(assignment dependent on the current window)2.Numerical keys(value input)3.Menu keys(assignment dependent on the current window,line orientated)4.Delete value input5.Cancel input/function;return to next higher menu level6.Confirm input,select/call marked entry(doubly available)7.Select keys(select characteristic of a system parameter)8.Scroll keys(move window within the displayable list by one line upwards/downwards)5.2.2The displayFig.5.4:Main window1.Number of the currently shown window with total number of windows(e.g.01/03means the first of three possible display2.Designation of the menu or function window3.Function of the menu key‘M1’;with the other menu keys the list entries shown on theleft can be activated in some windows(‘M2’→1st list entry etc.)4.Each list entry is assigned a definite number;when entering a number a searchfunction will be started,which let you go directly to an entry which is currently not visible,or the entry will be activated if it is already shown in the window5.Function of the keys‘F1 (5)(here I/0→‘F1’:display of the input/output states;'UP'→’F4’:scroll1window upwards;'DOWN'→‘F5’:scroll1window downwards)6.List entries The blinking cursor marks the entry which will be selected i.e.activatedwith the confirmation(Enter)keys(see previous section,item6);this is also possible by means of the menu keys M2..M4.7."Scroll bar":Information(qualitative)about the position of the current window(*)within the displayable list(|)Further explanations about the various windows you will found in the following descriptions of the menus.5.2.3Menu structureFor operating and observing of the motion controller various hierarchically classified display windows and configuration menus are available.The following diagram gives an overview of the menu structure.Detailed information for each window/screen is given in the corresponding reference manual of the motion controller.Fig.5.1:Menu structureAfter the device is switched on,the start screen(main window axis)with the angle positions of the axis(blades)will be displayed.The second main window contents an overview according to the status of the analog and digital inputs and the digital outputs of the motion controller(main window I/O)5.2.2.1Main window(Axis)Fig.5.6:Main window with examplePossibilities:1.Browse with and2.Display operating data for marked axis with Enter or e.g.M3(in the window asdisplayed above)for blade2(axis2/4).Fig.5.7:Operating data(Blade2)Explanations of the display:•Velocity(a/n)=actual and nominal speed•DeltaS=control deviation=difference between the calculated nominal value from the feedback control and the actual value•Voltage=control voltage on the analog output(here for Blade2at terminal block A2)•The drive can be operated manually(jog)or calibrated by means of certain function keys if the corresponding blade parameters have been correctlyconfigured(see Reference Manual of motion controller)F1:Fast jog in backward directionF2:Slow jog in backward directionF3:Calibration(see below)F4:Fast jog in forward directionF5:Slow jog in forward directionM1:Return to the MAIN WINDOW(AXES)3.Call information about the inputs and outputs of the Motion Controller:Change to theWINDOW(I/O)by means of F1;see next section4.Call device information or configure system parameters:Change to the MAIN MENUby means of M1Calibration(see also chapter5.3Homing routine axis/blade)Fig.5.8:Calibration(blade2)With the key F3an actual value correction can be activated for a specific blade(encoder group A and B).The value is to be defined at the blade parameters for the concerning axis (see Reference Manual motion controller).Condition:high level at terminal E1.2("/Stop")).5.2.2.2Main window(I/O)Fig.5.9:Main window(I/O)1.Digital inputs0…7on terminal block I22.Logic states of the8inputs in bit form,LSB(right)state of I2.0;1=High approx.24V3.Logic states in hexadecimal formatPossibilities:1.Browse with and2.Display actual values of axes:Change to MAIN WINDOW(AXES)with F1;3.Call device information or configure system parameters:Change to MAIN MENU withM1;see following section5.2.2.3Main menuMenu key M1activation in one of the two main windows:Fig.5.10:Main menuPossibilities:1.Browse with and2.Activate marked menu point with“Enter”and process the next sub-point(seefollowing sections);one of the menu keys M2...M4can also be used for activating3.Change to the MAIN WINDOW(AXES)or MAIN WINDOW(I/O)with F1,M1or ESC;5.2.2.4Device informationThis window informs about the hardware and software versions of the MotionControllers and about the cumulated runtime of the device as shown as an example:Fig.5.10:Device information5.2.2.5Stored failuresThis window displays a list with up to20failures occurred(most recent on top).Principle of memory management is a ring buffer.Fig.5.11:Fault memory("1.05"->axle1,fault code5)The following failures will be recognized:•DeltaS>DeltaS max. Drag error exceeds its maximum value when moving in forward direction(see blade parameters in the reference manual motioncontroller)•DeltaS<DeltaS min. Drag error exceeds its maximum value when moving in the reverse direction•General data transmission failure(stop bit,parity,overwriting or checksum error) and Error in the LB2protocol(see reference manual motion controller)Fig.5.13:Blade-specific window(in this case blade2)By selecting M1you return again to the main menu.(See also Chapter4.1.4)5.3Homing routine axis /bladeWarningOnly one blade should be moved out of the parking position.Consequently,before moving a second blade,it must be ensured that the first blade is in parking position again.The axis to be referenced must first be directly selected in the main window by use of the keys M2-axis1,M3-axis2and M4-axis3.When an axle is selected the following windowopens:Fig.5.14:Blade 2operating dataThe blade to be referenced must now be moved manually to the mechanical zero point of the blade.When this is done,in order to exclude a counting range overflow,the sensor must be set to the counting range mean value by operating the yellow pushbutton.The button is located at the rear of the sensor under a screw cap.Fig.5.15: Sensor pushbuttonThe referencing of the blade can now be started with the F3key.After “Carrying out the calibration”has been confirmed with F1,the current angle value is automatically accepted as the zero point and stored in axis parameter 53.The displayed actual angle value must now be 0°.The referencing is now completed.Return to the main window using M1.6MaintenanceGeneralBecause of the varied operating conditions in which the plant operates(depending on the climatic environment and the load of the wind energy plant),only general recommendations concerning the required maintenance intervals can be given.Regular and careful inspection is required as well as maintenance in order to prevent malfunctions and to detect and remedy faults as they occur,before serious damage happens.In these operating instructions,as regards the maintenance interval,there is only a recommendation which has no effect on contractually specified agreements(especially in relation to the warranty).Before starting any work on the pitch system,especially before opening the covers of live parts,you must ensure that the components and the plant are disconnected in accordance with regulations.In addition to the main circuits also look out for possible boosting or auxiliary circuits,especially standstill heating systems!Here the"5Safety Rules"are(e.g.as per DIN VDE0105):•isolate•secure against restarting•establish isolation from supply•grounding and short-circuiting(for voltages above1000V)•safeguard or cover adjacent live parts.NoteThe supplied operating instructions for the components in question are always applicable for the maintenance intervals and the replacement of components.Always quote the plant number when returning faulty components to SSB.Warning/CautionBecause of the heavy dead weight of a cover or components(such as battery container, pitch motor,transformer,etc.)they must always be removed with great caution,so that they are not damaged during removal,do not damage other components or cause injuries.。
风电变桨系统标准
风电变桨系统标准
1.通用要求
风电变桨系统应满足以下通用要求：
1.1.系统应符合国家相关标准和规范，并经过权威机构的认证。
1.2.系统应具有高可靠性，能够保证长期稳定运行。
1.3.系统应具有高效率，能够最大限度地利用风能资源。
1.4.系统应具有良好的可维护性，便于日常维护和检修。
1.5.系统应具有高安全性，能够保证人员和设备安全。
2.性能要求
风电变桨系统应满足以下性能要求：
2.1.系统应具有宽广的调速范围，能够适应不同风速条件下的变桨控制。
2.2.系统应具有快速响应能力，能够及时调整桨叶角度以适应风速变化。
2.3.系统应具有高精度控制能力，能够保证桨叶角度的准确性和稳定性。
2.4.系统应具有智能控制功能，能够根据风速、转速等参数自动调整桨叶角度。
3.安全性要求
风电变桨系统应满足以下安全性要求：
3.1.系统应具有完善的安全保护措施，包括过载保护、欠载保护、过速保护、低速保护等。
3.2.系统应具有故障报警功能，能够及时发现并提示故障类型和位置。
3.3.系统应具有可靠的电气隔离措施，防止不同电气回路之间的相互干扰。
3.4.系统应具有安全防护装置，能够防止意外人员接近桨叶旋转区域。
4.环境适应性要求
风电变桨系统应满足以下环境适应性要求：
4.1.系统应能够在恶劣的环境条件下稳定运行，如高温、低温、强风、沙尘暴等。
4.2.系统应具有良好的防雷击和抗电磁干扰能力。
4.3.系统应适应不同的电网条件，如电压波动、频率变化等。
变桨系统的基本操作
变桨系统的基本操作变桨系统是一种高效利用风能的技术工具，它能够根据风速和风向的变化，自动调整桨叶的角度和转速，以使风能被最大程度地转化为电能。
下面将介绍变桨系统的基本操作。
一、变桨系统的概述变桨系统主要由变桨控制器、变桨驱动机构和变桨机构组成。
变桨控制器负责监测风速和风向，根据设定的参数控制变桨驱动机构的动作，进而调整桨叶的角度。
变桨驱动机构根据控制器的指令，通过液压或电动机等手段实现桨叶的转动。
变桨机构则是桨叶和驱动机构的连接部分，它能够使桨叶绕轴心转动。
二、变桨系统的基本操作步骤1.初始化：启动变桨系统前，需要对系统进行初始化。
包括检查并确保变桨控制器和驱动机构的工作状态良好，检查桨叶和机构的连接是否牢固，以及确认各通信线路是否连接正确。
2.监测环境：变桨系统需要实时监测环境中的风速和风向，通常会配备风速风向传感器。
传感器将风速和风向信息传递给变桨控制器。
3.判断风速：变桨控制器接收到风速信息后，根据预设的参数判断当前风速是否超过了设定值。
如果风速低于设定值，则不需要调整桨叶的角度；如果风速高于设定值，则需要根据参数设定的规则调整桨叶的角度。
4.调整桨叶角度：当风速超过设定值时，变桨控制器会通过信号传递给变桨驱动机构。
驱动机构根据控制器的指令，调整桨叶的角度。
如果风速过大，驱动机构会将桨叶的角度调整为最佳状态，以减小风对桨叶的影响，保证风能的最大利用率。
如果风速逐渐减小，则桨叶的角度也会随之调整。
5.监测桨叶状态：变桨系统还需要监测桨叶的工作状态，包括桨叶的转速、角度以及叶片表面的磨损程度等。
如果发现桨叶存在异常情况，如转速过高、角度偏差过大或磨损过度等，需要及时修复或更换。
同时，系统也应该随时准备好进行维护和保养。
6.停止系统：当风力不足或需要对系统进行检修时，可以选择停止变桨系统的运行。
这时，变桨控制器会发送停止信号给变桨驱动机构，桨叶会被固定在一些角度上，不再调整。
三、变桨系统的注意事项1.变桨系统的操作和维护需要由专业人员进行。
海装机组变桨控制系统基础知识讲解
元件篇
1F2、1F3（2F4、2F5）——单相 防雷器
三级防雷保护器，标称电压 为255V,标称放电电流为3KA。
元件篇
2F1-2F5(X4)——模拟量过压 保护模块
用于对24V信号的防 雷及过压保护， 标称电压24V， 标称电流10A，启动电压33V。
蓄电池维护
"LC-"系列 Figure No: 1 2 3 4 5 6 7 8 9 10 11 12 Model No: LC-*********
报警动作指示灯
电源指示灯
元件篇
1F2(3F1)——热继电器
主要用作对电机进行过 载保护，它的工作原理是过载 电流通过热继的双金属热元件 后，由于材质不同产生不同的 加热特性，弯曲变形带动机械 连锁机构使辅助触点动作，实 现报警信号的上传，最终断开 电动机供电主电路。 鉴于双金属片受热弯曲过程中， 热量的传递需要较长的时间， 因此，热继电器不能用作短路 瞬时保护，而只能用作过载保 护。
C： 电流输出减小到限流点 M： 电流输出减小到额定电
流
二位数码管
元件篇
6A3（1A1)——三相电压监控继电器
REL：设为”us”档，使用过/欠压检测、 相序检测功能
min:-30%当电网电压跌落至AC280V时输 出报警信号，辅助触点断开
Max:-20%当电网电压升高至480V时，输 出报警信号，辅助触点断开
呼吸孔 直流电池组
呼吸孔
恒温加热器
PT100
直流制动器 （同轴）
测速发电机 （同轴）
冷却风扇
电路连接口
法兰盘
电枢主轴
绝对值A编码器 （同轴）
PT100
PTC元件
（定子槽内） （定子槽内）
金风1.5MW风力发电机组Vensys变桨系统介绍
名称
开关电源
型号
ZIVAN
功能及端口定义
功能：将50HZ线电压400V(三相)交流电输入转换为60V直流电输出。 AUX1 C\AUX1 NO=开关电源正常输出信号
额定60V/80A
ON/OFF=开关电源工作/停止工作信号 LSENSE 电流检测通道
变频器
SW:AC2T2IFWMF145_HYSO4
功能：采集超级电容高低电压； X4:4=／X4:3分别采集电容高低60V／30V直流输入电压； X4:5=模块24V电源的接口；X4:9／X4:10=电压检测模拟量输出； X4:11=电流检测模拟量输出
A10自制模块
旋转编码器
1=旋边电源；3/7=正/负向SSI脉冲输入；5=清零端；8/9=速度和位移 反馈；10=反馈旋边工作正常信号；
功能：将60VDC转换成三相频率可变的29VAC BATT/-BATT为直流输入,U V W为交流电输出；
额定48V/450A
F3/F9控制变桨电机刹车电磁阀； E5=自动变桨控制信号；F4=自动变桨使能； E12=叶片向0度方向变桨信号；E13=叶片向90度方向变桨信号； F6/F12外部过载信号；
0° 接近开关
电机控制 及信号线
电机控制 及信号线
电机控制 及信号线
3.1 变桨系统驱动原理
Profibus DP 状态 自动/手动切换 Beckhoff I/O system 向0度变桨 向90度变桨 手动 控制 状 态 信 息 控 制 命 令 A10电压/ 电流转换 电压 电流 信号 DC 24V DC/DC 变换 风扇 温 度 信 号 Pt100 状 态 信 号 控 制 命 令 变 桨 速 度
20
发电机转速 （Ω—rpm）
金风变桨系统
包括电源故障、传感器故障、执行器故障等，可能导致系统无法 正常工作或误动作。
机械故障
如轴承磨损、齿轮断裂、液压泄漏等，可能导致系统运行异常或 停机。
控制系统故障
包括控制器故障、通信故障等，可能导致系统失控或无法远程监 控。
诊断方法和步骤
观察法
通过观察系统运行状态、指示灯、故 障代码等信息，初步判断故障类型和 范围。
海上风电市场潜力巨大
随着海上风电技术的不断成熟和成本降低，海上风电市场将迎来爆发式增长。金风变桨系统凭借其先进的技术和可靠 性，将在海上风电领域占据重要地位。
国际市场拓展
金风科技作为国内风电行业的领军企业，积极拓展国际市场，参与全球竞争。其变桨系统凭借卓越的性能和品质，将 在国际市场上获得更多认可和应用。
通过采用高强度轻质材料和优化结构设计，金风变桨系统实现了轻 量化，降低了机组的载荷和疲劳损伤。
高扭矩密度
金风变桨系统具有高扭矩密度的特点，能够在低风速下提供足够的 扭矩，确保风电机组在复杂风况下的稳定运行。
稳定性与可靠性
冗余设计
金风变桨系统采用冗余设计，关 键部件如传感器、控制器等均有 备份，确保在单一部件故障时，
航空航天领域
金风变桨系统的高精度、高可靠性特点使其在航空航天领域具有潜在应用价值 ，如无人机、飞行器等。
典型案例分析
1 2 3
某大型风电场项目
该项目采用金风变桨系统，实现了风能的高效利 用和机组的稳定运行，提高了风电场的经济效益 。
某海上风电示范项目
该项目采用金风变桨系统，成功应对了海上恶劣 环境的挑战，为海上风电项目的开发提供了有力 支持。
加强人员培训，提高操作和维护人员的技能水平，确保系统安全稳定运行。
风力发电机组变桨系统设计与控制
风力发电机组变桨系统设计与控制近年来，随着全球能源危机的爆发以及对环境保护的重视，风力发电作为一种可再生的清洁能源正日益受到广泛关注。
风力发电机组的变桨系统是其中一个重要的组成部分，它通过调整桨叶的角度来控制风机的转速和输出功率，以实现最佳风能利用率。
本文将详细介绍风力发电机组变桨系统的设计原理和控制策略。
首先，风力发电机组的变桨系统设计需要考虑多个因素。
其中包括风速、风向、风场条件以及机组的工作状况等。
在设计变桨系统时，需要确定合适的桨叶数目、桨叶形状、桨叶材料以及桨叶安装方式等。
同时，还需要考虑叶片的结构强度以及在高风速情况下的耐用性。
这些设计要素将直接影响到风机的性能和寿命。
其次，风力发电机组的变桨系统需要采用合适的控制策略来实现最佳风能利用效率。
一般来说，风机的控制策略可以分为两种类型：定常控制和非定常控制。
定常控制是基于恒定的控制策略，根据风场条件和机组负荷，设定固定的桨叶角度来实现最佳功率输出。
非定常控制则是基于实时测量的风速和机组运行状态，动态调整桨叶角度来实现最佳风能利用效率。
根据不同的需求和场地条件，可以选择合适的控制策略。
在风力发电机组变桨系统的实际控制中，通常采用闭环控制的方式。
这意味着需要传感器来实时测量风速、机组运行状态以及环境参数，并将这些数据反馈给控制系统。
控制系统会根据这些反馈数据，不断调整桨叶角度，以实现最佳风能利用效率。
同时，还需要考虑到系统的安全性和鲁棒性，以应对突发情况和异常工况。
除了设计和控制策略，风力发电机组变桨系统还需要考虑到系统的维护和保养。
定期的维护和保养可以延长系统的寿命并提高系统的性能。
在维护和保养过程中，需要检查桨叶的磨损情况、润滑系统的工作状态以及传感器的准确性等。
同时，还需要定期进行系统的校准和参数调整，以保证系统的稳定性和准确性。
尽管风力发电机组变桨系统的设计和控制存在一定的挑战和难点，但通过合理的设计和有效的控制策略，可以实现风能资源的最佳利用。
金风1.5MW风力发电机组的变桨系统介绍
90度限位开关 0度接近开关 变桨电机3 旋转编码器 电磁刹车 动力电源线 变桨柜1
线路连接
滑环
3× 2.5mm2
DP总线 (3)
安 全 链
DP总线 (3)
DP总线 (3)
安 全 链
DP总线 (3)
DP总线 （3）
3× 400V AC 供电 x5c 4× 2.5mm
2
x5b x5a
x10a x10b Pitchbox1 x10c x9 x8 x6 x7
BC3150有一个 PROFIBUS-DP 现场总线接口，可在 PROFIBUS-DP 系统中作为智能从站使用。 “紧凑型”总线端子控制器 BC3150 比较小巧而且经济BC3150 通过 K-BUS 总线扩展技术，可连接 多达 255 个总线端子。 KL1104 数字量输入端子从现场设备获得二进制控制信号，并以电隔离的信号形式将数据传输到 更高层的自动化单元。每个总线端子含 4 个通道，每个通道都有一个 LED 指示其信号状态。 KL2408（正极变换）数字量输出模块将自动化控制层传输过来的二进制控制信号以电隔离的信 号形式传到设备层的执行机构。 KL2408有反向电压保护功能。其负载电流输出有过载和短路保护功 能。每个总线端子含 8 个通道，每个通道都有一个 LED 指示其信号状态。 KL3404模拟量输入端子可处理 -10 V 和 +10 V 或 0 V 和 10 V 范围的信号。分辨率为 12 位，在 电隔离的状态下被传送到上一级自动化设备。在 KL3404总线端子中，有 4 个输入端为 2 线制型，并 有一个公共的接地电位端。输入端的内部接地为基准电位。
名称
开关电源
型号
ZIVAN
功能及端口定义
功能：将50HZ线电压400V(三相)交流电输入转换为60V直流电输出。 AUX1 C\AUX1 NO=开关电源正常输出信号
1.5MW变桨系统
基本原理图
绝对式旋转编码器GM 400
• 25位分辨率，8192脉冲/4096 圈 • 格雷码或二进制码输出 • 自诊断功能 • 电子清零 • 可选组件：增量通道A，B；
旋转编码器
温度传感器 （Pt 100）
这种温度传感器是利用导体铂 （pt）的电阻值随温度的变化 而变化的特性来测量温度的。 通常这样的温度传感器可以测 量负200到正500摄氏度的范围， 而且在这个温度范围下，铂的 电阻值和温度具有良好的线性 关系。
电 机 温 度
DC 60V 开关电源 U 电源开关 DC 0V
变桨逆变器 叶 片 桨 距 角
V
W
电 机 刹 车
电机 转速 反馈
变桨电机
旋转编码器 90 度 限 位 开 关 0 度 接 近 开 关
变桨控制系统实现风力发电机组的变桨控制，在额定功率以上通过控制叶片桨 距角使输出功率保持在额定状态。变桨控制柜主电路采用交流--直流--交流回 路，由逆变器为变桨电机供电，变桨电机采用交流异步电机，变桨速率由变桨 电机转速调节。 每个叶片的变桨控制柜，都配备一套由超级电容组成的备用电源，超级电容储 备的能量，在保证变桨控制柜内部电路正常工作的前提下，足以使叶片以 7°/s的速率，从0°顺桨到90°。当来自滑环的电网电压掉电时，备用电源直 接给变桨控制系统供电，仍可保证整套变桨电控系统正常工作。相比密封铅酸 蓄电池作为备用电源的变桨系统，采用超级电容的变桨控制系统具有下列优点： a、充电时间短； b、交流变直流的整流模块同时作为充电器，无须再单独配置充放电管理电路； c、超级电容随使用年限的增加，容量减小的非常小； d、寿命长； e、无须维护； f、体积小，重量轻等优点； g、充电时产生的热量少。
三、变桨系统的硬件组成
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华锐风电科技有限公司 风力发电机组培训教材 变桨部分 1.变桨控制系统简介 变桨控制系统包括三个主要部件，驱动装置－电机，齿轮箱和变桨轴承。从额定功率起，通过控制系统将叶片以精细的变桨角度向顺桨方向转动，实现风机的功率控制。如果一个驱动器发生故障，另两个驱动器可以安全地使风机停机。 变桨控制系统是通过改变叶片迎角，实现功率变化来进行调节的。通过在叶片和轮毂之间安装的变桨驱动电机带动回转轴承转动从而改变叶片迎角，由此控制叶片的升力，以达到控制作用在风轮叶片上的扭矩和功率的目的。在90度迎角时是叶片的工作位置。在风力发电机组正常运行时，叶片向小迎角方向变化而达到限制功率。一般变桨角度范围为0～86度。采用变桨矩调节，风机的启动性好、刹车机构简单，叶片顺桨后风轮转速可以逐渐下降、额定点以前的功率输出饱满、额定点以的输出功率平滑、风轮叶根承受的动、静载荷小。 变桨系统作为基本制动系统，可以在额定功率范围内对风机速度进行控制。 变桨控制系统有四个主要任务： 1. 通过调整叶片角把风机的电力速度控制在规定风速之上的一个恒定速度。 2. 当安全链被打开时，使用转子作为空气动力制动装置把叶子转回到羽状位置（安全运行）。 3. 调整叶片角以规定的最低风速从风中获得适当的电力。 4. 通过衰减风转交互作用引起的震动使风机上的机械载荷极小化。
2.变桨轴承 2.1安装位置 变桨轴承安装在轮毂上，通过外圈螺栓把紧。其内齿圈与变桨驱动装置啮合运动，并与叶片联接 2.2工作原理
当风向发生变化时，通过变桨驱动电机带动变桨轴承转动从而改变叶片对风向地迎角，使叶片保持最佳的迎风状态，由此控制叶片的升力，以达到控制作用在叶片上的扭矩和功率的目的。 2.3变桨轴承的剖面图 从剖面图可以看出，变桨轴承采用深沟球轴承深沟球轴承主要承受纯径向载荷，也可承受轴向载荷。承受纯径向载荷时，接触角为零。 位置1：变桨轴承外圈螺栓孔，与轮毂联接。 位置2：变桨轴承内圈螺栓孔，与叶片联接。 位置3：S标记，轴承淬硬轨迹的始末点，此区轴承承受力较弱，要避免进入工作区。 位置4：位置工艺孔。 位置5：定位销孔，用来定位变桨轴承和轮毂。 位置6：进油孔，在此孔打入润滑油，起到润滑轴承作用。 位置7：最小滚动圆直径的标记（啮合圆）。 2.4变桨轴承基本维护 1.检查变桨轴承表面清洁度。 2.检查变桨轴承表面防腐涂层。 3.检查变桨轴承齿面情况。 4.变桨轴承螺栓的紧固。 5.变桨轴承润滑。
2.5变桨系统工作环境 安装地点 内陆和沿海地区 工作寿命 20年 环境温度范围 -35°C 到 +45°C 机舱内温度范围 -35°C 到 +55°C 工作过程中环境温度范围 -35°C 到 +55°C 露天环境要求 腐蚀性，盐雾，流砂 相对湿度 在+40°C时为5% 到 95%，露点 3.变桨驱动装置
3.1安装位置
变桨驱动装置通过螺柱与轮毂配合联接。变桨齿轮箱前的小齿轮与变桨轴承内圈啮合，并要保证啮合间隙应在0.2～0.5mm之间，间隙由加工精度保证，无法调整 3.2组成部件 变桨驱动装置由变桨电机和变桨齿轮箱两部分组成。 3.3工作原理 变桨齿轮箱必须为小型并且具有高过载能力。齿轮箱不能自锁定以便小齿轮驱动。为了调整变桨，叶片可以旋转到参考位置，顺桨位置，在该位置叶片以大约双倍的额定扭矩瞬间压下止挡。这在一天运行之中可以发生多次。通过短时间使变频器和电机过载来达到要求的扭矩。齿轮箱和电机是直联型。变桨电机是含有位置反馈和电热调节器的伺服电动机。电动机由变频器连接到直流母线供给电流。 3.4变桨驱动装置平面图 位置1：压板用螺纹孔，用于安装小齿轮压板。 位置2：驱动器吊环，用于起吊安装变桨驱动器。 位置3：螺柱。与轮毂联接用。 位置4：电机接线盒。 3.5变桨驱动装置的基本维护 1.检查变将驱动装置表面清洁度。 2.检查变将驱动装置表面防腐层。 3.检查变桨电机是否过热、有异常噪声等。 4.检查变桨齿轮箱润滑油。 5.检查变桨驱动装置螺栓紧固。 3.6变桨电机技术参数 电机类型 异步电机 数量 每个叶片一个，总共3个 额定功率 3KW 极数 可选择 额定电压 -3相400VAC 频率 50HZ 防护等级 ≥IP55 齿轮输入速度 取决于极对数 旋转方向 双向，均布 温度等级 F，在环境温度为+55℃时能力为F级 冷却 用一个风扇强制风冷 温度检测 一个内置在定子绕组中的Pt-100 工作模式 变频器操作，增加du/dt值，增加铁芯损耗，增加电压峰值 电机连接 单传动，闭合环路 工作时间 100%，当制动器有飞轮时，电机必须继续保持叶片在工作位置 动态工作 最大加速度125 1 rpm/s 扭矩限制 最大扭矩限制到65 Nm 电缆长度 ≥3.0 m 使用寿命 ≥ 20 年, 6000 小时/年,70% 静态 和 30% 动态位置控制,采用脉动负荷。
3.7变桨齿轮箱技术参数 数量 每个叶片一个，共3个 额定输出扭矩 7500 Nm 最大输出扭矩（静态） 9300 Nm 额定传动速度 取决于电机中的极对数 传动比 取决于电机中的极对数 额定输出速度 9.09 1/rpm 相对于输出端（低速轴），电机和齿轮箱的最大惯性矩 320 kgm²
额定驱动功率 3 kW 优选润滑剂（脂） MOBILITH SHC 460如果使用其它润滑剂，必须提供与优选润滑剂的相容证明 维护周期（脂） ≥ 20 年 优选润滑剂（油） MOBILGEAR SHC XMP 320如果使用其它润滑剂，必须提供与优选润滑剂的相容证明 维护周期（油） ≥ 5 年
4.雷电保护装置 4.1安装位置 雷电保护装置在变桨装置中的具体位置见图1，在大齿圈下方偏左一个螺栓孔的位置装第一个保护爪，然后120等分安装另外两个雷电保护爪。 4.2组成部件 雷电保护爪主要由三部分组成,按照安装顺序从上到下依次是垫片压板，炭纤维刷和集电爪。 4.3工作原理 雷电保护装置可以有效的将作用在轮毂和叶片上的电流通过集电爪导到地面，避免雷击使风机线路损坏。炭纤维刷是为了补偿静电的不平衡，雷击通过风机的金属部分传导。在旋转和非旋转部分的过渡处采用火花放电器。这个系统有额外的电刷来保护轴承和提供静电平衡的方法。 4.4雷电保护装置的基本维护 1.检查雷电保护装置的表面清洁。 2.检查炭刷纤维的是否完好。 3.检查雷电保护装置螺栓的紧固。 5.顺桨接近撞块和变桨限位撞块 变桨限位撞块 5.1安装位置 变桨限位撞块安装在变桨轴承内圈内侧，与缓冲块配合使用。 5.2工作原理 当叶片变桨趋于最大角度的时候，变桨限位撞块会运行到缓冲块上起到变桨缓冲作用，以保护变桨系统，保证系统正常运行。 位置1：变桨限位撞块与变桨轴承连接时定位导向螺钉孔。 位置2：顺桨接近撞块安装螺栓孔，与变桨限位撞块连接。 位置3：变桨限位撞块安装螺栓孔，与变桨轴承连接。 顺桨接近撞块 5.3安装位置 顺桨接近撞块安装在变桨限位撞块上，与顺桨感光装置配合使用。 5.4工作原理 当叶片变桨趋于顺桨位置时，顺桨接近撞块就会运行到顺桨感光装置上方，感光装置接受信号后会传递给变桨系统，提示叶片已经处于顺桨位置。 5.5 顺桨接近撞块和变桨限位撞块的基本维护 1.检查顺桨感光装置的清洁度，以保证能够正常接受感光信号。 2.检查易损件缓冲块，做到及时更换。 3.检查各撞块螺栓的紧固。 6.极限工作位置撞块和限位开关 极限工作位置撞块 6.1安装位置 极限工作位置撞块安装在内圈内侧两个对应的螺栓孔上。 6.2工作原理 当变桨轴承趋于极限工作位置时，极限工作位置撞块就会运行到限位开关上方，与限位开关撞杆作用，限位开关撞杆安装在限位开关上，当其受到撞击后，限位开关会把信号通过电缆传递给变频柜，提示变桨轴承已经处于极限工作位置。 6.3限位开关的基本维护 1.检查开关灵敏度，是否有松动。 2.检查限位开关接线是正常，手动刹车测试。 3.检查螺栓紧固。 7.变频柜和电池柜 7.1安装位置
变频柜和电池柜安装在柜子支架上，柜子支架安装在轮毂上。 7.2工作原理 电池柜系统的目的是保证变桨系统在外部电源中断时可以安全操作。电池柜是通过二极管连接到变频器共用的直流母线供电装置，在外部电源中断时由电池供应电力保证变桨系统的安全工作。每一个变频器都有一个制动断路器在制动状态时避免过高电压。变频器应留有与PLC的通讯接口。 位置1：柜子支架安装螺纹孔。 位置2：连接板安装螺纹孔。
7.3变频柜和电池柜基本维护 1.变浆控制柜/轮毂之间缓冲器是否有磨损。 2.变浆控制柜内接线是否有松动。 3.柜子支架及柜子的螺栓紧固。 8.轮毂变桨装置按螺栓分部件统计
1.变桨轴承与轮毂连接