基于直流侧电压的风电输出功率平滑控制策略比较与研究  

Comparison and Research of the Output Power Smoothing Control Strategy for Wind Power Generation Systems based on DC Voltage

作　　者：张庆富 成云朋 李斌[2] 张志强 李明刚 隋茹 朱瑛[2] ZHANG Qingfu;CHENG Yunpeng;LI Bin;ZHANG Zhiqiang;LI Minggang;SUI Ru;ZHU Ying(Yancheng Power Supply Company of State Grid Jiangsu Electric Power Co.,Ltd.,Yancheng 224008,China;College of Electrical and Power Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]国网江苏省电力有限公司盐城供电分公司,江苏盐城224008 [2]河海大学电气与动力工程学院,南京211100

出　　处：《大电机技术》2024年第6期117-129,共13页Large Electric Machine and Hydraulic Turbine

基　　金：国网江苏省电力有限公司科技项目(J2023035);国家自然科学基金联合基金项目(U1966205)。

摘　　要：风电系统输出功率受风速间歇性和随机性的影响将随机波动,从而影响电能质量及电网运行的稳定性。无需储能装置,依靠风机自身平滑输出功率的直接功率控制方法得到了广泛的研究,基于风电变换器直流侧电容电压控制便是其中的一种。首先,本文总结了现有文献中提出的两种直流母线电压控制方法的优缺点,提出了一种新型有效的基于分段区间电压控制的功率平滑策略。然后,通过采用低通滤波器得到平滑功率的参考值,在设置了直流母线电压范围的基础上,分析并研究了低通滤波时间常数τ可取的最大值。最后,以永磁直驱风电系统为仿真研究对象,将所提控制策略与以往的控制方法进行比较,结果表明本文提出的控制策略具有更好的跟踪平滑指令和风机启动能力。The output power of wind power system fluctuates randomly due to the intermittency and randomness of wind speed,thus affecting power quality and stable operation of the power grid.Direct power control methods relying on the smoothing ability of the wind turbine itself without energy storage device have been widely studied and the voltage control based on the DC side capacitance of the wind power converter is one of them.Firstly,in this paper,advantages and disadvantages of two DC bus voltage control methods proposed by now are summarized,and a new effective power smoothing strategy based on interval voltage control is proposed.Then,the low-pass filter is used to get the reference value of the smoothing power,and the maximum value of time constant is analyzed and studied based on the range of DC bus voltage being determined.Finally,the proposed control strategy is compared with the previous control methods,and the results show that the proposed control strategy has better ability of tracing smoothing instruction and start-up ability of the wind turbine.

关 键 词：永磁同步发电机 风力发电 功率平滑 直流母线电压控制 

分 类 号：TM341[电气工程—电机]