新能源孤岛柔直送出系统耗能电阻优化配置研究  

Study on optimal configuration of energy-dissipating resistors in VSC-HVDC system for new energy island

作　　者：冯燕波 王姗姗 吴广禄 赵兵 尹睿 任永浩 彭红英 FENG Yanbo;WANG Shanshan;WU Gangu;ZHAO Bing;YIN Rui;REN Yonghao;PENG Hongying(State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Beijing 100192,China)

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院有限公司),北京100192

出　　处：《浙江电力》2024年第7期94-102,共9页Zhejiang Electric Power

基　　金：国家自然科学基金联合基金项目(XT71-21-001)。

摘　　要：在新能源孤岛经柔直送出系统中,通过投入等容量分组交流耗能电阻可实现故障穿越期间系统盈余功率的消纳。当单组耗能电阻功率过大时,会对系统造成严重冲击。因此,提出了一种基于进制转换的非等容量交流耗能电阻优化配置方法及其投切策略。首先,分析了等容量分组交流耗能电阻的动作特性。然后,为柔直系统配置单组容量各不相同但总容量与柔直系统容量相等的多组交流耗能电阻,并对不同容量的耗能电阻进行组合,以获得不同的耗能功率。最后,在PSCAD/EMTDC仿真平台上搭建并网模型进行验证。仿真结果表明,采用该方法及投切策略提高了耗能电阻的投切精度,降低了对系统的冲击,缩短了故障恢复时间,实现了对故障穿越期间盈余功率的精准消纳。In VSC-HVDC system for new energy island,surplus power consumption in the system during fault ridethrough(FRT)is achieved by employing grouped AC energy-dissipating resistors of equal capacity.However,the presence of an excessively powered resistor group can inflict severe impacts on the system.Therefore,a novel opti⁃mal configuration method for energy-dissipating resistors with different capacities based on progression conversion and the switching strategy are proposed.Firstly,the operational characteristics of the grouped AC energy-dissipating resistors of equal capacity are analyzed.Subsequently,multiple groups of AC energy-dissipating resistors with vary⁃ing capacities,collectively equivalent to the total capacity of the VSC-HVDC system,are configured,and different combinations of the resistors are employed to obtain varying dissipating powers.Finally,a model of the integrated grid is constructed and validated using the PSCAD/EMTDC simulation platform.Simulation results demonstrate that the proposed method and switching strategy enhance the precision of resistor switching,mitigate system impacts,shorten fault recovery time,and precisely consumes surplus power during fault ride-through.

关 键 词：柔直 故障穿越 盈余功率 耗能装置 二进制 

分 类 号：TM721.1[电气工程—电力系统及自动化]