电力系统保护与控制Issue(3)：14-20,7.
基于电力系统二次调频原理的微电源频率控制策略
A novel frequency control strategy of micro-grid based on the secondary frequency regulation of power system
摘要
Abstract
Because of the characteristic of small capacity and low inertia of the inverter based micro-generation, the load changing in islanded micro-grid has large impact on frequency and voltage. A novel frequency control strategy of micro-grid based on the secondary frequency regulation of power system is proposed. Traditional droop control strategy of micro-grid is not a no-error adjustment. It can’t guarantee the frequency of micro-grid operate at rated state when the load changes. Besides the P-f droop control strategy, the proposed frequency control strategy introduces the proportional-integral (PI) control into control flow. The process is a no-error adjustment, which is similar to the secondary frequency regulation of power system. In order to overcome the disadvantage of low inertia of micro-grid, a first-order inertia link which imitates the motion equation of rotor of synchronous generator is added to the proposed frequency control strategy. So the stability of frequency in micro-grid is greatly improved. The typical operation states of micro-grid such as loads change, loads shock, the random loads fluctuation in islanded mode, and the operation states transform are simulated based on MATLAB/Simulink. Simulation results verify the correctness and validity of the proposed frequency control strategy.关键词
微电网/孤岛运行/二次调频/无差调节/频率控制Key words
micro-grid/islanded operation/secondary frequency regulation/no-error adjustment/frequency control分类
信息技术与安全科学引用本文复制引用
徐诚,刘念,赵泓,朱桂萍,肖先勇,赵正龙..基于电力系统二次调频原理的微电源频率控制策略[J].电力系统保护与控制,2013,(3):14-20,7.基金项目
国家自然科学基金资助项目(50823001) （50823001）
