多虚拟同步发电机独立微网的多目标分布式二次控制方法  

Multi-objective Distributed Secondary Control Method for Multi-VSG Independent Microgrid

作　　者：黄敏灵 程静[1,2] 胡健雄 HUANG Minling;CHENG Jing;HU Jianxiong(School of Electrical Engineering,Xinjiang University,Urumqi 830047,Xinjiang Uygur Autonomous Region,China;Renewable Energy Power Generation and Grid-connected Control Engineering Research Center of the Ministry of Education,Urumqi 830047,Xinjiang Uygur Autonomous Region,China)

机构地区：[1]新疆大学电气工程学院,新疆维吾尔自治区乌鲁木齐市830047 [2]可再生能源发电与并网控制教育部工程研究中心,新疆维吾尔自治区乌鲁木齐市830047

出　　处：《现代电力》2025年第2期256-262,共7页Modern Electric Power

基　　金：新疆维吾尔自治区重大科技专项(2022A01001-4);国家自然科学基金资助项目(52267005)。

摘　　要：当由多虚拟同步发电机(virtual synchronous generator,VSG)组成的电网遭受外部扰动时,传统的VSG控制会引起频率电压的偏移、无功功率均分精度低以及有功功率振荡等问题,容易引发系统的过载和失稳。针对以上问题,首先,分析了VSG的下垂特性和功率振荡的原因,然后,提出了一种多目标协调的二次控制策略,利用有功功率的一致性频率恢复控制策略,自适应调节有功功率的参考值,实现频率恢复和有功功率的精确比例均分;利用无功功率的一致性和平均电压恢复控制策略,自适应补偿电压,实现电压恢复和无功功率的精确比例均分。最后,通过仿真验证了该控制策略的有效性和鲁棒性。When a power grid composed of multiple virtual synchronous generators(abbr.VSGs)experiences external disturbances,traditional VSG control can lead to issues such as frequency and voltage deviations,low accuracy in reactive power sharing,and active power oscillations,which can easily cause system overload and instability.To address these problems,firstly,the droop characteristics and reasons for power oscillations of VSGs were analyzed.Secondly,a multi-objective coordinated secondary control strategy was proposed.In this strategy,the consistency frequency restoration control strategy for active power was used to adaptively adjust the reference value of active power to achieve frequency restoration and accurate proportional sharing of active power,the consistency and average voltage restoration control strategy for reactive power was used to adaptively compensate for voltage to achieve voltage restoration and accurate proportional sharing of reactive power.Finally,the effectiveness and robustness of this control strategy are verified through simulation.

关 键 词：虚拟同步机 分布式控制 功率振荡抑制 频率电压恢复 功率分配 微电网 

分 类 号：TM73[电气工程—电力系统及自动化]