考虑不同线阻的直流微电网多储能单元荷电状态均衡控制策略

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关键词：直流微电网；多储能单元；荷电状态；等效线路阻抗；下垂控制；变速因子；母线电压中图分类号：TN743-34；TM743 文献标识码：A 文章编号：1004-373X（2025）20-0087-08

SOC balancing control strategy of multiple energy storage units in DC microgrid considering different line resistance

HEZhiyuan，XIWANGAbuduwayiti （College of Electrical Engineering，XinjiangUniversity，Urumqi83oo17，China）

Abstract：Animproveddroopcontrol strategyconsidering diferentlineimpedances isproposedtoaddress theissueof reduced stateofcharge（SOC）balance levelsinmultipleenergystorageunitsinisolatedDCmicrogrids.Onthebasisof traditionaldroopcontrol，linresistancecompensationvoltageandvariablespedfactorareaddedtoalocatethecurrntofach energystorageunitreasonably，therebyrealizingrapidSOCbalance.Byimprovingthedroopcontrol，equivalentlineimpedance isintroducedtoconsiderbalancingthecurrentoftheenergystorageunitwhensuddenlyconnectedtothelocalload，achieving SOCbalance under disturbanceconditions.The bus voltagecompensation controlstrategy wasadded to compensate for the DC busvoltageandmaintainitattheratedvalue.ThesimulationmodelinMatlab/Simulinkisbuilt.Thesimulationresultsshowthat theproposedimproveddroopcontrolstrategycan eliminate theinfluenceof lineresistanceandachieveacuratecurrent distributionandfastSOCbalancingundervarious disturbanceconditions，whichhasacertain theoretical significanceforSOC balancing of multiple energy storage units.

Keywords：DCmicrogrid;multienergystorage;stateofcharge;equivalent lineimpedance;sagcontrol;variablespeed factor; bus voltage

0 引言

随着分布式能源的大力发展，微电网作为利用分布式能源供电的重要方式而备受关注。（剩余8898字）