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感性电网阻抗下的微网稳定性分析

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由于电网中感性阻抗和本地负载的影响,使得逆变器输出电流不能满足入网标准.建立了弱电网下考虑本地负载和电网阻抗的光伏并网逆变器控制模型,包括电网阻抗和公共耦合点处负载,并通过阻抗分析法,较精确地描述了系统的稳定裕量.研究不同电网阻抗下系统控制参数的整定,以提高光伏并网控制系统的稳定性.通过仿真验证此模型下参数整定的有效性.
Stability Analysis of Microgrid dhder Inductive Network Impedance
Due to a certain degree of inductive impedance in the power grid,it can not be regarded as an ideal voltage source.The impedance will affect the control performance of the inverter,and even lead to the instability of the system,which makes the output current of the inverter can not meet the network access standard.The existence of local load will also affect the analysis of system stability to a certain extent.Therefore,the control model of PV grid connected inverter considering local load and grid impedance is established,including grid impedance and load at common coupling point.The stability margin of the system is described more accurately by impedance analysis method.Based on this model,the tuning of system control parameters under different grid impedances is studied to improve the stability of photovoltaic grid connected control system.The effectiveness of parameter tuning is verified by simulation.

weak power gridgrid impedancegrid-connected inverterPCC

江勇、王绍帅

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辽港控股(营口)有限公司水电分公司,辽宁 营口 115007

弱电网 电网阻抗 并网逆变器 公共耦合点

2024

电气开关
沈阳电气传动研究所

电气开关

影响因子:0.281
ISSN:1004-289X
年,卷(期):2024.62(6)