面向大容量风电并网的VSC-MTDC功率协调控制  

Power Coordination Control Strategy of VSC-MTDC System for Large-scale Wind Power Grid Connection

作　　者：于滨 傅晓帆[1] 龙凌[1] 熊国江 YU Bin;FU Xiaofan;LONG Ling;XIONG Guojiang(College of Electrical Engineering,Guizhou University,Guiyang 550025,China;Guizhou University Institute of Engineering Investigation and Design Co.,Ltd.,Guiyang 550025,China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025 [2]贵州大学勘察设计研究院有限责任公司,贵州贵阳550025

出　　处：《机械与电子》2024年第6期16-21,共6页Machinery & Electronics

基　　金：国家自然科学基金资助项目(52167007);贵州大学勘察设计研究院有限责任公司创新基金(贵大勘察[2022]03号)。

摘　　要：基于电压源换流站的多端直流输电(VSC-MTDC)已成为大容量风电远距离传输并网的首要选择。针对含大规模风电场的VSC-MTDC系统的功率协调控制策略进行了深入研究。首先,分析大规模风电并网时下垂系数对有功功率分配的影响,指出采用固定下垂系数存在优先级电网功率缺额的可能性和缺乏有功功率分配灵活性等问题。然后,针对此类问题,提出一种基于主从控制与自适应下垂控制相结合的功率协调控制策略,该策略根据风电功率情况制定3种控制模式,从而实现风电功率灵活分配。最后,在MATLAB/Simulink上构建了风电并网的四端柔性直流输电系统,仿真结果验证了所提控制策略的可行性和有效性。The voltage source converter-based multi-terminal DC power transmission system(VSC-MTDC)has become the primary choice for achieving long-distance power transmission and grid connection of large capacity wind power.This paper mainly focuses on the improved power coordination control strategy of VSC-MTDC systems with large-scale wind farms.Firstly,this paper analyzes the influence of sag coefficient on active power distribution when large-scale wind power is connected to the grid,and points out that the fixed droop coefficient has drawbacks such as the possibility of priority grid power shortage and lack of flexibility in allocating active power.To address these issues,this paper proposes a coordinated control strategy based on the combination of master-slave control and adaptive droop control,which formulates three control modes according to the wind power situation,so as to realize the flexible distribution of wind power.Finally,a four-terminal flexible DC transmission system for wind power connected to the grid is built on MATLAB/Simulink,and the simulation results verify the feasibility and effectiveness of the proposed control strategy.

关 键 词：多端柔性直流输电 有功功率分配 协调控制策略 自适应下垂控制 风电并网 

分 类 号：TM74[电气工程—电力系统及自动化]