摘要
新能源大规模并网会给电力系统的动态安全稳定带来新影响,因此新能源的安全、稳定、高效利用是能源未来的发展方向之一。不同种类的新能源对电力系统的暂态稳定影响各不相同,采用“域”的分析法能够较好地解决这一问题。首先,提出了基于改进的动态差分进化-内点法(dynamic differential evolution-interior point method,DDE-IPM)进行动态安全域构建和分析,该方法与传统方法相比,具有速度快、误差小、准确率高等优点。其次,在DIgSILENT/PowerFactory进行时域仿真,对故障下不同种类新能源、不同渗透率下系统动态安全域进行校验,并分析系统在不同渗透率下的低电压穿越能力,得出以下结论:在系统各新能源渗透率下,系统的动态安全域超平面具有平行的性质且边界距离与新能源的容量增量成正比;新能源的补偿设备对系统的暂态安全性在一定范围内起到支撑作用,系统的动态安全域有所外扩;系统风电机组和光伏电站均满足并网运行的低电压穿越能力。
The large-scale grid-connection of new energy sources will bring new impact on the dynamic safety and stability of the power system,so the safe,stable and efficient utilization of new energy sources is one of the future directions of energy development.Different types of new energy sources have different effects on the transient stability of power systems,and this problem can be better solved by using the“region”analysis method.This paper proposes to construct and analyze the dynamic safety region applying the improved dynamic differential evolution-interior point method(DDE-IPM),which has the advantages of high speed,low error and high accuracy compared with the traditional method.The time-domain simulation in DIgSILENT/PowerFactory calibrates the dynamic safety region of the system under different types of new energy and different penetration rate under fault,and analyzes the low voltage ride-through capability of the system under different penetration rates,and draws the following conclusions:the dynamic safety region hyperplane of the system is parallel in nature and the boundary distance is proportional to the capacity of the new energy under each penetration rate of the system.The compensation equipment of the new energy source supports the transient safety of the system within a certain range,and the dynamic safety region of the system is expanded;both wind power and PV plants of the system have the LVRT capability of grid-connected operation.
作者
杨金海
武家辉
王海云
姚磊
YANG Jinhai;WU Jiahui;WANG Haiyun;YAO Lei(Engineering Research Center of Education Ministry for Renewable Energy Power Generation and Grid Control,Xinjiang University,Urumqi 830047,China;State Grid Xinjiang Integrated Energy Service Co.,Ltd.,Urumqi 830011,China)
出处
《电力建设》
CSCD
北大核心
2022年第4期58-68,共11页
Electric Power Construction
基金
新疆维吾尔自治区自然科学基金(2020D01C068)。
关键词
渗透率
超平面系数
时域仿真
实用拟合
动态安全域
permeability
hyperplane coefficient
time domain simulation
practical fitting
dynamic security region
