基于基频调制电流源换流器的海上风电送出系统的启动控制策略  

Startup control strategy for offshore wind power transmission system based on fundamental frequency modulation-based current source converter

作　　者：李晓博[1] 冯定腾 姚辰昊 熊小玲 赵成勇[1] LI Xiaobo;FENG Dingteng;YAO Chenhao;XIONG Xiaoling;ZHAO Chengyong(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电力自动化设备》2024年第9期65-72,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金联合基金资助项目(U23B20119)。

摘　　要：基频调制电流源换流器(FFM-CSC)可以显著提高海上风电送出系统的功率密度和经济性,现有黑启动方法需要在交流侧投切黑启动电阻,但该方式会增大海上平台的建设成本。为此,提出一种利用FFM-CSC交流侧LC滤波器的启动方法,可以提高系统黑启动方案的经济性。分析了海上风电送出系统的结构和稳态控制策略。为了分析黑启动原理,建立了送端CSC交流侧空载时的数学模型,并提出了其交流侧等效的基波和谐波通路。在此基础上,提出了海上风电送出系统的黑启动控制策略。在PSCAD/EMTDC进行仿真验证,结果表明:所提黑启动策略可以在交流侧空载时建立起风电场电网电压,平稳完成海上风电场黑启动。Fundamental frequency modulation-based current source converter(FFM-CSC)can significantly improve the power density and economy of offshore wind power transmission system.Existing black start methods require switching black start resistors on the AC side,but this method will increase the construction cost of offshore platforms.Therefore,a start-up method using FFM-CSC at AC side LC filter is proposed,which can improve the economy of the system’s black start scheme.The structure and steady-state control strategy of the offshore wind power transmission system are analyzed.In order to analyze the black start principle,a mathematical model is established for the sending-end CSC under no-load conditions at AC side,and the equivalent fundamental and harmonic paths at AC side are proposed.On this basis,a black start control strategy for the offshore wind power transmission system is proposed.The simulation verification is conducted based on PSCAD/EMTDC,and the results show that the proposed black start strategy can establish the wind farm grid voltage when the AC side is unloaded,and smoothly complete the black start of offshore wind farm.

关 键 词：海上风电 直流输电 电流源换流器 黑启动 谐波通路 

分 类 号：TM46[电气工程—电器]