基于超级电容的直驱风电功率和电压平抑控制  

Power and Voltage Suppression Control for Direct Drive Wind Power Generation Based on Supercapacitor

作　　者：庄英超 赵培峰 樊毅 赵金 ZHUANG Ying-chao;ZHAO Pei-feng;FAN Yi;ZHAO Jin(State Grid Shanxi Electric Power Company Yuncheng Branch,Yuncheng 044000,China;不详)

机构地区：[1]国网山西省电力公司运城供电公司,山西运城044000 [2]国网山西省电力公司,山西太原030021

出　　处：《电力电子技术》2024年第12期82-86,共5页Power Electronics

基　　金：国网山西省电力公司科技项目(5205M0220001)。

摘　　要：传统基于永磁直线发电机(PMLG)的直驱风力发电装置随风速波动会导致发电机输出功率的大范围频繁波动,对电网电能质量造成不良影响,并大大降低了电力电子功率转换装置的利用率。此处提出一种基于超级电容储能的功率波动平抑策略,通过在直驱风力发电并网的直流母线上并联由超级电容和双向DC/DC变换器组成的储能单元,设计了带储能单元的PMLG直驱风力发电并网系统各部分协调控制策略,实现了电机侧变流器最大风力能跟踪、电网侧变流器单位功率因数并网和超级电容单元对直驱风力发电并网功率波动的平抑,最后通过构建基于RTDS的硬件在环实验平台,验证了协调控制策略的正确性。Direct drive wind power generation devices based on permanent magnet linear generator(PMLG)fluctuate with wind speed,resulting in a wide range of frequent generator output power fluctuations,which has adverse effects on power quality of the grid and greatly reduces the utilization rate of power electronic power conversion devices.A power fluctuation suppression strategy based on supercapacitor energy storage is proposed.By paralleling the energy storage unit composed of supercapacitor and bidirectional DC/DC converter on the direct current bus of direct drive wind power grid connection,the coordinated control strategy of each part of PMLG direct drive wind power grid connection system with energy storage unit is designed.The maximum wind energy tracking of the motor side converter,grid-connected power factor of the grid side converter and the suppression of grid-connected power fluctuations by the supercapacitor unit are realized.Finally,the correctness of the coordinated control strategy is verified by constructing a hardware-in-the-loop experimental platform based on RTDS.

关 键 词：永磁直线发电机 直驱风力发电 超级电容 

分 类 号：TM351[电气工程—电机]