WINGREEN's pitch system product range covers low-temperature type (dow↕n to -40℃), high-altitude type (up to 4000m) and intertidal zone ty​pe, which can be applied in harsh environments including low-temperature areas in Inner Mo≥ngolia, high-humidity and high-altitude areas in Yunnan and Guizh"ou, and coastal areas in Nantong and Yancheng.

Power Class

Drive

Motor

Back-up source

1.5MW

DC drive

/Low-voltage AC drive

/High-voltage AC drive

DC series excitation

/Communication

/AC asynchronous

Battery pack/

Super-capacitor bank

2.0MW

2.5MW

High-voltage AC drive

/Low-voltage AC drive

Ac servo

/AC asynchronous

Super-capacitor bank

3.0MW

5.0MW

High-voltage AC drive

Ac servo

Super-capacitor bank

Features of WINGREEN Series Pitch Control System


1. Software and hardware double safety chain circuit
Software safety chain control circuit: Fault points such as system communicatio✔n fault, internal fault of pitch PLC, pitch overspeed signal,↕ encoder hopping, and charger fault are connected in series inside the sof•tware to form a safety chain circuit for safety protection.
Hardware safety chain control circuit: Fault points such as mastπer control EFC signal and driver status signal feedback are connected to form a safety c≠hain circuit for safety protection.

2. Optimized emergency feathering control
In case of normal operation of pitch controller PLC and AC power supply: The controll™er PLC controls the driver to retract the blades according to a predetermined curve. It can r♠educe the speed in advance when approaching the limit switch to re>duce the load of the unit.
In case of abnormal operation of controller PLC and AC power supply&: The wind turbine automatically switches to the super-capacitor bank of back-up source to power‌ the driver, and drives the pitch motor to retract the blades according to the built-in retrac®ting curve until it reaches the limit switch.

3. Built-in UPS power supply mode
24VDC UPS is built in pitch control system, and redundant switchingα power supply is designed to realize seamless switching between AC power supply ÷and DC back-up source.

4. Sophisticated fault record diagnosis
The pitch controller PLC can record and save the fault codes, parameters', operation curves and other information of the pitch system in rea l time, and can quickly and accurately troubleshoot and deal with the faults during the o≥verhaul and maintenance of the system.

5. Abundant and friendly debugging interface
The pitch control HMI debugging interface has the advantages of functionalit≥y, intuition and accuracy. It can implement customi↓zed functions, and carry out debugging and detection, parameter modificat→ion and maintenance, troubleshooting and other operations on the pitch control sys♥tem.

6. Superior equipment performance
u    Position steady-state error: ≤ 0.02
u    Position dynamic response delay: ≤100ms
u    Normal pitch tracking deviation: ≤2
u    Control mode: Position control or speed control

7. Modular and integrated design
The pitch control system is optimized and integrated by control module, driver module, and chargπing management module, so as to reduce maintenance problems.