独立微网下频率和电压自恢复的二次调节及功率分配控制方法
摘要：传统的虚拟同步机控制策略在独立微网运行情况下系统出现大容量负载投切时，系统频率和电压会偏离额定值，严重时将会发生频率和电压越限，影响系统的安全运行。为解决这个问题，首先基于虚拟同步机控制策略提出一种在独立微网下频率和电压二次自恢复调节控制方法，实现变流器的频率和电压自治恢复调节。其次，针对变流器线路阻抗参数不一致，导致变流器输出有功功率和无功功率分配不均的问题，分析产生此现象的原因，提出功率均分控制策略，实现功率的分配控制。最后，采用单母线和网状2种结构对提出的控制算法进行验证。算例结果证明该控制策略的有效性和通用性。
Abstract:When large capacity load switching-over takes place in the islanded microgrid, in which the traditional control strategy for virtual synchronous generator is being utilized, the voltage and frequency of the microgrid might deviate rated values, and in severe case the out-of-limit of frequency and voltage may occur, thus the secure operation of microgrid will be affected. To solve this problem, firstly, based on virtual synchronous generator control strategy a secondary self-recovery regulation and control method for voltage and frequency under the environment of islanded microgrid was proposed to implement autonomous recovery and regulation of converter’s frequency and voltage. Secondly, in allusion to the fact that the inconsistency of converter line impedance parameters led to uneven distribution of active and reactive power output from converters, the reason of this phenomenon was analyzed, and a control strategy for the uniform distribution of active and reactive power was put forward to realize the distribution control of active and reactive power. Finally, two structures, i.e., single busbar structure and meshy structure, were utilized to verify the proposed control algorithm, and both effectiveness and universality of the proposed control strategy were proved.
标题：独立微网下频率和电压自恢复的二次调节及功率分配控制方法
英文标题：A Secondary Control Strategy for Frequency and Voltage Recovery and Power Sharing Control Method in Island Microgrid
作者：马俊杰, 李永刚, 李建文, 李广地, 贺鹏康,
关键词：碳中和, 虚拟同步机控制, 二次调频, 二次调压, 功率分配控制,
发表日期：2022-06-10
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