基于全功率变流器的失速型风电机组低电压穿越改造  

Low Voltage Ride-through Improvement for Fixed-speed Wind Turbines Based on Full Power Converters

作　　者：黄伟煌[1,2,3] 付勋波[1,3] 胡书举[1,3] 许洪华[1,3] 

机构地区：[1]中国科学院电工研究所,北京市100190 [2]中国科学院研究生院,北京市100080 [3]中国科学院风能利用重点实验室,北京市100190

出　　处：《电力系统自动化》2013年第6期1-6,共6页Automation of Electric Power Systems

基　　金：国家科技支撑计划资助项目(2012BAA01B00)~~

摘　　要：提出了一种基于变流器的失速型风电机组低电压穿越改造方案。该方案采用全功率背靠背变流器,机侧变流器稳定定子电压,网侧变流器稳定直流母线电压并发出无功电流,实现了机组在电压跌落期间的有功平衡和无功补偿。结合失速型风电机组的特点,提出了一种以稳定定子电压为控制目标的机侧控制策略,并设计了电压电流双闭环控制来抑制机侧滤波电路带来的振荡。在MATLAB/Simulink中建立了780kW失速型风电机组仿真模型,并在110kW电机平台上进行了实验,验证了方案的可行性。A new low voltage ride-through（LVRT） improvement scheme for fixed-speed wind turbines（FSWTs） based on converters is proposed.The scheme adopts back-to-back full power converters.The generator-side converter is used to stabilize the stator voltage while the grid-side converter is used to stabilize the DC bus voltage and export reactive current.Active power balance and reactive power compensation of FSWTs under fault conditions are realized.A new control strategy for generator-side converter is proposed considering the characteristic of FSWTs,which takes the stator voltage as control target and uses double closed-loop control of voltage and current to restrain the oscillation caused by the generator-side filter circuit.Simulation model of the 780 kW FSWT is developed with MATLAB/Simulink,and the experiment is carried out on a 110 kW motor platform.The results validate the proposed scheme.

关 键 词：失速型风电机组 全功率变流器 低电压穿越 定子电压控制 双闭环控制 

分 类 号：TM461[电气工程—电器]