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Pitch System NES5420

This product is a control device specially designed for independent electric pitch of wind unit. In order to adapt the sever operation condition in hub, this product has conduct sufficient consideration and test proving in the structure and electric design. It is able to operate reliably under extreme environment and feather the pitch fast and reliable under fault condition thus to guarantee the safe operation of unit.

This product is a control device specially designed for independent electric pitch of wind unit. In order to adapt the sever operation condition in hub, this product has conduct sufficient consideration and test proving in the structure and electric design. It is able to operate reliably under extreme environment and feather the pitch fast and reliable under fault condition thus to guarantee the safe operation of unit.

  • Applicable machine type: 1~3 MW double-fed wind turbine group
  • Operating ambient temperature: -20℃~ +40C
  • Storage ambient temperature: -40℃~ +50C
  • Above sea level: <2000m
  • Degree of protection: control cabinet IP65
  • Range of pitch angle (°) : 0 ~ 91 (subject to the installation of sensor)
  • Accuracy of control (°): 0.01
  • Response speed (s): ≤0.1
  • Max. pitch speed (°/s): 10
  • Back-up power: lead-acid storage battery / Super capacitor
  • Pitch speed when supplied by back-up power (°/s): 7
  • Service life of whole equipment: >20 years
  • Standard of insulation: GB 3859/93
  • Environment humidity: 0~95%
  • Driving generator: AC permanent magnet servo motor
  • Requirement for transportation package: could be transported in national 2 class roads
  • The designed service life of system structure is 20 years; the standard of mean time between failures (MTBF) of component is no less than 30000 hours; able to guarantee the requirement of the pitch regulation in wind turbine, the pitch speed when supplied by main power is 10°/s while the pitch speed when supplied by back-up power is 7°/s; the operation time of back-up power is no less than 40s; with complete security protection chain
  • Independent generator driver, drives the rotation of blade though reduction gears, fix control the blade
  • Ensure the emergency response of startup pitch motor and execute pitch feather procedure safely in case of servo motor failure
  • Guarantee limit seating in mechanical limit
  • Carry out pitch feathering procedure safely and stably when the controller is fault or communication is fault
  • Reliable and automatic feather the pitch in case of emergency fault
  • High pitch location accuracy and fast dynamic response
  • Energy management technology of back-up power
  • Strong interference resistance in system, good vibration resistance, lightning protection
  • Select different bus communication plan according to the demand of client
  • Design with high grade of protection; the overall grade of protection of pitch system is IP65

NARI Technology Co., Ltd.   Add: NO.19 Chengxin Avenue, Nanjing, CHINA
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