大容量调相机PSVR参数调整-《郑州大学学报(工学版)》

文章信息/Info

Author(s):: CHEN Qiang1; Wang Hua1; Kevin Wang2; Liu Yanhong2; 1. State Grid Henan Electric Power Research Institute 2. School of Electrical Engineering, Zhengzhou University

Keywords:: Excitation control system' target="_blank" rel="external">">Excitation control system; power system voltage regulators; synchronous condenser; small interference stability; Eigenvalue;

摘要:: 加装电力系统电压调节器PSVR的大容量同步调相机可为特高压直流输电提供有效的暂态电压支撑。以河南电网新增的两台大容量同步调相机为例，从调相机动态特性和小干扰稳定性角度，进行PSVR参数调整。分析调相机无功出力、PSVR参数对电压特性和功角特性的影响，提出针对调相机PSVR的参数调整方法；以调相机电压幅角特性曲线的均方根最小化为目标，调整PSVR移相环节时间常数；通过全网小干扰稳定特征值计算，确定调相机参与的电压振荡模式；依据不同系统运行方式、不同调相机无功出力下的电压振荡模式，结合功角振荡模式的核算，确定PSVR增益系数调整范围。所述方法能降低PSVR对功角的影响，有利于PSVR增益的灵活调整，为参数整定提供参考。

Abstract:: The large capacity synchronous condenser equipped with power system voltage regulator PSVR can provide effective transient voltage support for UHV DC transmission. Taking two new large capacity synchronous condensers in Henan power grid as an example, PSVR parameters are adjusted from the point of view of condenser dynamic characteristics and small disturbance stability. The influence of condenser reactive power output and PSVR parameters on voltage characteristics and power angle characteristics is analyzed, and a approach for adjusting PSVR parameters is proposed. Time constant s in PSVR phase shifting segments are adjusted to minimize the root mean square of voltage amplitude angle characteristic curve. Voltage oscillation modes relevant to condensers are determined by the eigenvalue calculation of small disturbance stability on whole system. According to voltage oscillation modesunder different system operation modes and different condenser reactive power outputs, and combining with power angle oscillation mode check calculation, the adjustment ranges of PSVR gain coefficient s are determined. The presented approach can reduce the influence of PSVR on power angle, facilitate the flexible adjustment of PSVR gain, and provide reference for parameter tuning.