摘要
为了改善飞轮储能阵列系统网侧变换器在充放电模式下的稳态性能、减少网侧三相电流的谐波含量、加快系统的动态响应,以三相两电平电压型变换器为研究对象,提出了一种基于模型预测算法的网侧变换器改进直接功率控制策略。首先建立了网侧功率预测模型,然后根据上述预测模型计算出了相应的交流侧参考输出电压以使下一采样周期中的功率偏差为零,最后经空间矢量脉宽调制模块生成开关信号控制网侧变换器。此外,该策略采用了直流母线电压平方的外环结构,控制目标是迅速稳定直流母线电压。同时在PSCAD/EMTDC仿真平台对所提控制策略进行了验证。结果表明:与传统直接功率控制策略相比,所提控制策略不仅稳态性能优越、电能质量与预期相符,而且动态响应迅速。
To improve the steady state performance of the grid-side converter of the flywheel energy storage array system(FESAS)in charge-discharge mode,reduce the harmonic content of the three-phase current on the grid side and accelerate the dynamic response of the system,taking three-phase two-level voltage type converter as the research object,an improved direct power control strategy for grid-side converter based on model predictive algorithm was proposed.Firstly,the grid-side power prediction model was established.And then the corresponding AC-side reference output voltage was calculated according to the above prediction model so that the power deviation in the next sampling period is zero.The switching signal was generated by the space vector pulse width modulation module to control the grid-side converter.In addition,the strategy adopted the outer loop structure of the square of the DC bus voltage,and the control goal was to quickly stabilize the DC bus voltage.Finally,the proposed control strategy was verified on the PSCAD/EMTDC simulation platform,and the results show that,compared with the traditional direct power control strategy,the proposed control strategy not only has superior steady state performance,power quality is consistent with the expected,but also has fast dynamic response.
作者
周云飞
孟克其劳
温彩凤
姜宏伟
李超峰
ZHOU Yunfei;MENG Keqilao;WEN Caifeng;JIANG Hongwei;LI Chaofeng(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,Inner Mongolia Autonomous Region,China;Key Laboratory of Wind Energy and Solar Energy Utilization Technology of Ministry of Education,Hohhot 010051,Inner Mongolia Autonomous Region,China;Inner Mongolia Wind Power Technology and Detection Engineering Technology Research Center,Hohhot 010051,Inner Mongolia Autonomous Region,China;Taiyuan Heavy Industry New Energy Equipment Co.,Ltd.,Taiyuan 030024,Shanxi Province,China)
出处
《分布式能源》
2021年第3期47-54,共8页
Distributed Energy
基金
内蒙古自治区科技重大专项项目(2020ZD0016)。
关键词
飞轮储能阵列系统
网侧变换器
模型预测算法
直接功率控制
空间矢量脉宽调制
flywheel energy storage array system
grid-side converter
model predictive algorithm
direct power control
space vector pulse width modulation
