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1.新型电力系统运行与控制全国重点实验室(清华大学电机工程与应用电子技术系),北京市 100084
2.国家电网公司东北分部,辽宁省沈阳市 110180
Received:17 March 2025,
Revised:2025-08-11,
Online First:10 November 2025,
Published:25 February 2026
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骆舒婕,夏德明,陈磊等.考虑低电压穿越锁相稳定与暂态过电压的VSC参数安全域[J].电力系统自动化,2026,50(4):163-172.
LUO Shujie,XIA Deming,CHEN Lei,et al.Security Region of Voltage Source Converter Parameters Considering Phase-locked Stability During Low Voltage Ride-through and Transient Overvoltage[J].Automation of Electric Power Systems,2026,50(4):163-172.
骆舒婕,夏德明,陈磊等.考虑低电压穿越锁相稳定与暂态过电压的VSC参数安全域[J].电力系统自动化,2026,50(4):163-172. DOI: 10.7500/AEPS20250317005.
LUO Shujie,XIA Deming,CHEN Lei,et al.Security Region of Voltage Source Converter Parameters Considering Phase-locked Stability During Low Voltage Ride-through and Transient Overvoltage[J].Automation of Electric Power Systems,2026,50(4):163-172. DOI: 10.7500/AEPS20250317005.
电网短路故障导致电压源型变流器(VSC)进入低电压穿越状态,穿越期间的锁相环稳定性与恢复后的暂态过电压是这个过程中关键的2个安全稳定问题。锁相环参数和低电压穿越期间电流参考值是其中的关键影响参数。文中提出一种综合考虑低电压穿越期间锁相稳定与恢复后暂态过电压的参数安全域计算方法。首先,针对初始点和平衡点之间的偏离量影响传统小扰动稳定判据有效性的问题,提出了考虑初始点偏离量的锁相稳定解析分析方法与参数安全域。其次,定义暂态过电压约束条件,并基于全过程机端电压解析表达式,计算暂态过电压约束下的参数安全域。最后,取交集得到综合考虑锁相稳定与暂态过电压的参数安全域。MATLAB/Simulink仿真结果验证了所得参数安全域的有效性。
Short-circuit faults of power grid cause voltage source converters (VSCs) to be in the low voltage ride-through (LVRT) state. During this process
the stability of the phase-locked loop (PLL) and the transient overvoltage after recovery are two critical problems of security and stability. The PLL parameters and the current reference values during the LVRT process are key influencing parameters. This paper proposes a method for calculating the parameter security region that comprehensively considers PLL stability during the LVRT process and transient overvoltage after recovery. Firstly
to address the issue of deviation between the initial point and the equilibrium point affecting the effectiveness of traditional small-disturbance stability criteria
a phase-locked stability analytical analysis method and a parameter security region considering initial point deviation are proposed. Secondly
transient overvoltage constraints are specified
and the parameter security region under transient overvoltage constraints is calculated based on the analytical expression of the terminal voltage throughout the entire process. Finally
the intersection is found to obtain the parameter security region that comprehensively considers PLL stability and transient overvoltage. The effectiveness of the derived parameter security region is validated by MATLAB/Simulink simulation results.
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