改善直流换相失败的储能STATCOM技术仿真研究  

Simulation of Energy Storage STATCOM to Improve HVDC Commutation Failure

作　　者：徐志 奚鑫泽 卢佳 XU Zhi;XI Xinze;LU Jia(Power Research Institute of Yunnan Power Grid,Kunming 650217,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南昆明650217

出　　处：《电工技术》2021年第19期42-46,50,共6页Electric Engineering

摘　　要：针对常规STATCOM在交流系统故障时,交流电压跌落导致电容电压大幅下跌,引起STATCOM保护动作,导致其退出运行,抑制LCC-HVDC换相失败效果不理想的问题,结合储能技术与无功补偿技术,提出基于储能的STATCOM技术来避免直流换相失败。首先,分析了储能STATCOM工作原理和数学模型;其次,在模型基础上提出了控制方法;最后,基于实际工程建立了储能STATCOM电磁暂态模型,并进行了仿真分析。仿真结果验证了储能STATCOM对受端母线电压提供了有效的支撑作用,能避免高压直流输电系统换相失败,提高交直流系统运行的稳定性。When the conventional STATCOM fails in the AC system,the AC voltage drop causes the capacitor voltage to drop sharply,causing the STATCOM protection action,resulting in its out of operation,and the effect of restraining the LCC-HVDC commutation failure is not ideal.Combined with energy storage technology and reactive power compensation technology,STATCOM technology based on energy storage is proposed to avoid DC commutation failure.Firstly,the working principle and mathematical model of energy storage STATCOM are analyzed.Secondly,the control method is proposed based on the model.Finally,the electromagnetic transient model of energy storage STATCOM is established based on the actual project,and the simulation analysis is carried out.The results show that the energy storage STATCOM can effectively support the bus voltage at the receiving end,inhibit the commutation failure of HVDC transmission system,and improve the operation stability of AC/DC system.

关 键 词：STATCOM 储能 直流输电 换相失败 

分 类 号：TM721.1[电气工程—电力系统及自动化]