摘要
从域的角度研究大型光伏电站对电力系统暂态稳定性的影响,用等容量的光伏电站替换常规发电机,计算含大型光伏电站的动态安全域(LPV-DSR)。通过对典型电力系统的大量仿真发现LPV-DSR边界仍可以用超平面拟合。通过与接入光伏电站前系统的DSR进行比较,得出3条经验规律:LVP-DSR边界与接入光伏电站前系统的DSR边界近似平行;从利于系统暂态稳定性的角度看,光伏电站换流器的最佳控制策略为定有功功率控制和定交流电压控制;同一种控制策略下,DSR范围随着接入系统光伏容量的增大而单调变化。
The influence of large-scale photovoltaic plant on transient stability of power system is researched from the perspective of domain,and the conventional generator is replaced by the photovoltaic plant with equal capacity to calculate the LPV-DSR(Dynamic Security Region with Large-scale PhotoVoltaic plant). Extensive simulations of typical power system show that the boundary of LPV-DSR can still be fitted by hyperplane. Three conclusions are obtained by the comparison with DSR of the system before the connection of photovoltaic plant: the boundary of LPVDSR is approximately parallel to the DSR boundary of the system before the photovoltaic plant connected;from the perspective of system transient stability,the optimal control strategy of photovoltaic converter is constant active power control and constant AC voltage control;the DSR range changes monotonously with the increase of grid-connected photovoltaic capacity under the same control strategy.
作者
方伟
刘怀东
秦婷
王锦桥
冯志强
FANG Wei;LIU Huaidong;QIN Ting;WANG Jinqiao;FENG Zhiqiang(Department of Electrical Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China;State Grid Suzhou Power Supply Company,Suzhou 215004,China;State Grid Qinhuangdao Power Supply Company,Qinhuangdao 066000,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2019年第3期189-193,199,共6页
Electric Power Automation Equipment
关键词
大型光伏电站
暂态
稳定性
动态安全域
拟合法
时域仿真
换流器控制策略
large-scale photovoltaic plant
transients
stability
dynamic security region
fitting method
time-domain simulation
converter control strategy
作者简介
方伟(1994—),男,湖北麻城人,硕士研究生,主要研究方向为电力系统安全性稳定性分析与控制(E-mail:1151460139@qq.com);刘怀东(1963—),男,山东东明人,副教授,硕士,主要研究方向为电力系统安全稳定性以及电力市场等(E-mail:hdliu@tju.edu.cn);秦婷(1993—),女,江苏南通人,硕士研究生,研究方向为电力系统安全性稳定性分析与控制(E-mail:qinting888@tju.edu.cn)。
