摘要
电网频率特性是电力系统运行机理分析和控制策略研究的基础,主要研究微电网中涉及双向储能设备的频率特性分析问题。首先,对变流器的功频特性和调频原理进行总结和分析。在此基础之上,针对传统频率特性分析法存在的参考值问题、单电源问题和单维度问题,提出双象限频率特性(dual quadrant frequency characteristic,DQFC)分析方法。该方法构建统一的功率参考体系,不但能实现传统分析方法的功能,而且可对双向储能设备和复杂多电源系统的一次调频、二次调频机理进行定性和定量分析。该多电源系统可由发电机组、无穷大电网、实际电网和多种控制策略下发电机模式/电动机模式运行的双向储能设备组合而成。最后,基于Matlab/Simulink仿真平台验证DQFC分析方法的正确性和可行性。
The frequency characteristic of the power grid is the basis of the research on the operation mechanism analysis and control strategy of the power system. This paper mainly studies the problem of frequency characteristic analysis in microgrid involving bidirectional energy storage devices. First of all,the frequency characteristic and frequency regulation principle of the converter are summarized and analyzed. On that basis,aiming at the reference value problem,single power problem and single dimension problem of traditional frequency characteristic analysis method,a dual quadrant frequency characteristic analysis method is proposed. The method established a unified power reference system,which can not only realize the functions of traditional analysis methods,but also can analyze the primary frequency regulation and secondary frequency regulation mechanisms of bidirectional energy storage devices and complex multi-power supply system qualitatively and quantitatively. The multi-power supply system can be composed of generator sets,infinite grid,practical grid and bidirectional energy storage devices operating in generator mode/motor mode under various control strategies.Finally,the correctness and feasibility of DQFC analysis method is verified based on MATLAB/Simulink simulation platform.
作者
吕志鹏
张雪原
张波
颜湘武
Lyu Zhipeng;Zhang Xueyuan;Zhang Bo;Yan Xiangwu(State Grid Shanghai Energy Internet Research Institute,Shanghai 200120,China;State Grid Shanghai Jiading Electric Power Supply Company,Shanghai 201800,China;Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province,North China Electric Power University,Baoding 071003,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第8期41-50,共10页
Acta Energiae Solaris Sinica
基金
国家电网有限公司总部科技项目-混合供能系统集成功率变换装备关键技术(5442SH190011)。
关键词
频率调节
AC-DC变流器
电动汽车
双象限频率特性分析方法
双向储能设备
electric frequency regulation
AC-DC power converters
electric vehicles
DQFC analysis method
bidirectional energy storage device
