一种用于储能系统的动态电压-频率复合控制方法  

A Dynamic Voltage-frequency Combined Control Method for Energy Storage System

作　　者：宋朋飞 汪马翔 杨桂兴 李吉晨 亢朋朋 温胜寒 SONG Pengfei;WANG Maxiang;YANG Guixing;LI Jichen;KANG Pengpeng;WEN Shenghan(State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi,Xinjiang 830047,China;State Grid Electric Power Research Institute,Nanjing,Jiangsu 210000,China)

机构地区：[1]国网新疆电力有限公司,新疆乌鲁木齐830047 [2]国网电力科学研究院有限公司,江苏南京210000

出　　处：《广东电力》2023年第8期8-14,共7页Guangdong Electric Power

基　　金：国家电网有限公司总部科技项目(5419-202040493A-0-0-00)。

摘　　要：利用基于电力电子变流器接入电网的储能系统的快速响应能力,在故障事件发生后为系统提供紧急频率、电压支撑,改善电网动态特性,已成为提升高比例新能源电力系统动态安全稳定的重要技术路径。频率-电压解耦控制是传统电力系统的经典控制方法,但随着电力系统电力电子化程度加深,频率-电压耦合性增强,复合控制展现出更好的发展潜力。通过分析电力系统中有功、无功、频率、电压四者间的耦合特性,提出一种适用于储能系统的动态电压-频率复合控制的方案。该方案在传统解耦控制的基础上,通过引入频率-无功、电压-有功控制,在并未复杂化选参和控制回路的前提下实现了电力系统整体动态稳定性的提升。仿真结果表明,所提储能系统复合控制方案在应对“N-1”故障事件时,相较于通用频率-电压解耦合控制,具有更优越的动态调节效果。The use of energy storage systems based on power electronic converters with fast response capability has become an important technical method to improve dynamic security and stability of the high-proportion renewable energy power systems by providing emergency frequency and voltage support after contingencies.Frequency and voltage decoupling control is the classical control strategy in traditional power systems,but with the deepening of the electrification degree of power systems,the coupling between frequency and voltage has increased,and the composite control of frequency and voltage has shown better development potential.Thus,this paper analyzes the coupling characteristics among active power,reactive power,frequency,and voltage in the high-voltage power systems and proposes a dynamic voltage-frequency composite control scheme suitable for energy storage systems.Based on the traditional decoupling control,this proposed scheme improves the overall dynamic stability of the power system by introducing frequency-reactive power and voltage-active power control without complicating the selection of the parameters as well as the loop of the controller.Simulation results show that the proposed composite control scheme for energy storage systems has better effect on improving dynamic security of the power system compared with commonly used frequency and voltage decoupling control when responding to N-1 contingencies.

关 键 词：储能系统 频率控制 电压控制 有功/无功功率控制 潮流方程 

分 类 号：TM761[电气工程—电力系统及自动化]