含构网型MMC的受端电网暂态稳定解析分析方法  

Analytical method for transient stability of receiving power system with grid-forming MMC

作　　者：陆秋瑜 郑建平 杨银国 于珍 刘洋 薛翼程 张哲任[2] 徐政[2] LU Qiuyu;ZHENG Jianping;YANG Yinguo;YU Zhen;LIU Yang;XUE Yicheng;ZHANG Zheren;XU Zheng(Power Dispatching Control Center of Guangdong Power Grid Corporation,Guangzhou 510600,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]广东电网有限责任公司电力调度控制中心,广东广州510600 [2]浙江大学电气工程学院,浙江杭州310027

出　　处：《电力自动化设备》2023年第4期69-77,共9页Electric Power Automation Equipment

基　　金：中国南方电网有限责任公司科技项目(036000KK52210042(GDKJXM20212057))。

摘　　要：针对新型电力系统中,构网型非同步机电源和同步机电源之间可能发生的暂态失稳现象,提出了适用于含构网型模块化多电平换流器(MMC)的受端电网暂态稳定解析分析方法。在故障期间和故障清除后系统中分别采用电流源和电压源对构网型MMC进行建模,并据此模型提出了临界切除角和临界切除时间的解析计算方法。基于所提解析分析方法,研究了MMC故障期间注入电流幅值和相角、故障位置、同步机和MMC对负荷的供电占比等关键因素对系统暂态稳定的影响机理。基于PSCAD/EMTDC搭建的电磁暂态仿真模型验证了所提解析分析方法的有效性、准确性和鲁棒性。In the new-type power systems,the grid-forming non-synchronous machine sources can lose tran⁃sient stability with the synchronous generator(SG).Therefore,an analytical method for transient stability of receiving system with grid-forming modular multilevel converter(MMC)is proposed.The grid-forming MMC is modeled as the current source and voltage source respectively during the fault and after the fault.Based on the model,the analytical calculation method of the critical clearing angle and critical clearing time is illustrated.According to the proposed analytical method,the influence of several critical factors on the system transient stability are analyzed,including the MMC injected current amplitude and phase angle,fault locations,load power sharing between the SG and MMC.Based on the PSCAD/EMTDC,the built electromagnetic transient simulation model verifies the effectiveness,accuracy and robustness of the proposed analytical method.

关 键 词：构网型MMC 同步机电源 暂态稳定性 临界切除时间 

分 类 号：TM712[电气工程—电力系统及自动化] TM46