基于GSNSC的风电系统故障穿越能力研究  

Research on GSNSC Based Fault Ride Through Capability of Wind Power System

作　　者：陈烁 唐彬伟 郭江涛 黄丽玲 CHEN Shuo;TANG Binwei;GUO Jiangtao;HUANG Liling(Mingyang Smart Energy Group Limited,Zhongshan 528437,China)

机构地区：[1]明阳智慧能源集团股份公司,广东中山528437

出　　处：《电器与能效管理技术》2022年第9期26-31,共6页Electrical & Energy Management Technology

摘　　要：为改善风电系统故障穿越能力,采用一种九开关变换器代替传统网侧变换器的解决方案。在对网侧九开关变换器(GSNSC)的数学模型、控制策略及零序分量注入的正弦脉宽调制策略理论分析的基础上,建立系统仿真模型。模拟多种并网点电压故障工况,对GSNSC运行特性进行深入分析。GSNSC可在电网电压故障工况下,灵活向电网注入补偿电压,维持风电系统输出电压稳定,并向电网快速注入无功电流,实现风电系统柔性故障穿越。仿真结果验证了GSNSC改善风电系统故障穿越能力的有效性。In order to improve the fault ride through capacity of wind power system,a nine-switch converter is adopted to replace the traditional grid side converter.Based on the theoretical analysis of the mathematical model,control strategy and zero-sequence component injection sinusoidal pulse width modulation strategy of grid side nine-switch converter(GSNSC),a simulation model of the system is established.The operation characteristics of GSNSC are analyzed in depth by simulating a variety of the grid connection point voltage fault conditions.GSNSC can flexibly inject compensation voltage into the power grid under the voltage fault condition to maintain the output voltage stability of the wind power system,and quickly inject reactive current into the power grid to realize the flexible fault crossing of the wind power system.The simulation results verify the effectiveness of GSNSC in improving the fault through capacity of wind power system.

关 键 词：网侧九开关变换器 零序分量注入 补偿电压 无功电流 

分 类 号：TM614[电气工程—电力系统及自动化]