Multivibrators Operated Anti⁃Islanding Protection Scheme with Frequency and Voltage Control for A Utility⁃Grid Integrated SPV / Battery Energy System  

作　　者：Harvinder Singh Akhil Gupta Surbhi Gupta 

机构地区：[1]Electrical Engineering Department,Chandigarh University,Mohali 140413,Punjab,India [2]Electrical Engineering Department,I.K.Gujral Punjab Technical University Main Campus,Kapurthala144603,Punjab,India

出　　处：《Journal of Harbin Institute of Technology(New Series)》2025年第2期38-54,共17页哈尔滨工业大学学报(英文版)

摘　　要：The utilization of hybrid energy systems has necessitated to address the various Power Quality(PQ)concerns in Distributed Generation(DG)networks.Owing to the emergence of DG networks in recent times,it is envisaged for every utility⁃grid⁃tied system to generate and utilize harmonic⁃less electric power.Therefore,the present research critically evaluates the operation of a utility⁃grid coordinated DG system and studies its islanding operation under faulted conditions.To achieve this,an Anti⁃Islanding Protection(AIP)scheme is developed which is capable of controlling the frequency and voltage variations.This scheme is operated by a coordinated operation of multivibrators.Their operation continuously traces the pre⁃defined limits of voltage,reactive,and real power,and matches with their reference values to avoid mismatch.It is revealed that,if the mismatched values of real and reactive power exceeded its threshold value of 0.1 p.u.,then the islanding condition is detected.Especially,the proposed system is assessed in two modes:utility⁃grid and islanding modes.In utility⁃grid mode,reactive power compensation is obtained by the control of voltage and frequency signals.However,in islanding mode,the real power requirement of the connected load is obtained with reduced harmonics under unsymmetrical faulted conditions.Incremental Conductance(IC)based Maximum Power Point Tracking(MPPT)technique ensures the extraction of maximum power under varying and stochastically atmospheric conditions.Simulation results reveal that the AIP scheme promptly disconnects the utility grid from the DG network in the minimum time during dynamic variations in frequency and voltage to prevent islanding.It is justified that there is violation of the considered threshold limits even under the faulted condition.The strategy of the switchgear scheme ensures the minimum detection time of the islanding operation.Total Harmonic Distortion(THD)is 0.26%for grid voltage.It validates according to the IEEE⁃1547 standard which stipulates th

关 键 词：AIP control frequency power quality Soar Photovoltanic(SPV) voltage 

分 类 号：TM6[电气工程—电力系统及自动化]