基于MMC-BESS的风电场功率及电压综合调节策略  

Integrated regulation strategy of wind farm power and PCC voltage based on MMC-BESS

作　　者：程从智 徐晨 戴珂[1] 黄永烁 潘非 Cheng Congzhi;Xu Chen;Dai Ke;Huang Yongshuo;Pan Fei(Key Laboratory of Power Electronics and Energy Management for Ministry of Education of China,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Nanning Power Supply Company,Guangxi Power Grid Co.,Ltd.,Nanning 530229,China;Shanghai Surpass Sun Electric Co.,Ltd.,Shanghai 200331,China)

机构地区：[1]华中科技大学电气与电子工程学院电力电子与能量管理教育部重点实验室,武汉430074 [2]广西电网有限责任公司南宁供电局,南宁530229 [3]上海追日电气有限公司,上海200331

出　　处：《电测与仪表》2023年第12期59-64,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51807073)。

摘　　要：风电并网存在功率及公共耦合点(Point of Common Coupling,PCC)电压波动问题,常规方法为采用储能装置与无功补偿装置分别进行调节,但会导致系统结构复杂。文中研究了一种基于模块化多电平变换器拓扑的电池储能系统(Modular Multilevel Converter Based Battery Energy Storage System,MMC-BESS),可对风电场功率及电压进行综合调节。由于风速的随机性导致风电场输出功率波动,提出将风电场有功功率输入到一阶低通滤波器中,滤波器输出与输入的差作为MMC-BESS有功参考信号,以平滑风电场并网功率。由于风电场负荷突变导致PCC电压波动,提出将PCC电压的d轴分量与额定值作差,通过PI调节生成无功参考电流,实现PCC电压调节,在模拟风电场场景下进行实验,实验结果验证了风电场中MMC-BESS四象限功率补偿能力。Wind farm grid-connection has power and point of common coupling(PCC)voltage fluctuation problems.The conventional method is to adopt energy storage and reactive power compensation device to adjust separately,but it will lead to complex system structure.In this paper,a battery energy storage system based on modular multilevel converter(MMC-BESS)is studied,which can comprehensively regulate the power and voltage of wind farms.Aiming at the fluctuations of output power due to the random wind speed,it is input into a first-order low-pass filter,and the difference between the filter output and the input is used as the MMC-BESS reference signal to smooth the wind farm grid-connected power.In order to suppress PCC voltage fluctuations due to load mutation,the difference between the d-axis component of PCC voltage and the rated value is made.And then,the reactive power current reference is generated by proportional integral(PI)controller to adjust the PCC voltage,experiments are carried out in a simulated wind farm scene,and the experimental results verify the power compensation capability of MMC-BESS four-quadrant in the wind farm.

关 键 词：模块化多电平变换器 电池储能系统 风电场 波动功率抑制 PCC电压调节 

分 类 号：TM761[电气工程—电力系统及自动化]