含跟网型VSC的交流系统暂态稳定解析模型及协调控制  

Transient stability analytical model and coordination control of AC system with GFL-VSC

作　　者：薛翼程 张哲任[1] 徐政[1] XUE Yicheng;ZHANG Zheren;XU Zheng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]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9期63-70,111,共9页Electric Power Automation Equipment

摘　　要：电压源换流器(VSC)型高压直流输电系统接入,可能引起交流系统暂态稳定特性发生变化.因此,针对含跟网型VSC的交流系统开展暂态稳定解析分析.建立了故障前、故障期间和故障后系统的暂态稳定解析模型,并提出了一种基于离散积分的系统故障临界清除时间解析计算方法.基于解析模型,分析了故障期间VSC注入电流相位和幅值、故障位置对交流系统暂态稳定的影响.提出了一种增强交流系统暂态稳定性的协调控制策略,其利用广域测量系统获取临界同步机群的转子角频率,实现VSC的有功、无功电流动态调制.基于PSCAD/EMTDC搭建的多机系统电磁暂态仿真模型,验证了理论分析的正确性、所提控制策略的有效性和鲁棒性.The integration of voltage source converter-based high voltage direct current(VSC-HVDC)can change the transient stability characteristics of AC system.Therefore,an analytical analysis of the AC sys⁃tem with grid-following voltage source converter(GFL-VSC)is presented.The transient stability analytical models of the pre-fault,fault-on and post-fault systems are built.An analytical calculative method based on discrete integration for calculating the critical clearing time of the system fault is proposed.Based on the analytical model,the influence of the phase and magnitude of the VSC injection current and fault location on the transient stability of AC system is studied.A coordination control strategy is proposed for transient stability enhancement of AC system.It acquires the rotor angular frequency of critical synchronous generators through wide area measurement system to achieve active and reactive current dynamic adjustment of VSC.The electromagnetic transient simulation model of a multi-machine system built based on PSCAD/EMTDC verifies the correctness of theoretical analysis and the robustness and effectiveness of the proposed control strategy.

关 键 词：跟网型电压源换流器 同步机电源 暂态功角稳定性 临界切除时间 协调控制 

分 类 号：TM712[电气工程—电力系统及自动化] TM46