【摘要】 电网侧电压发生不对称跌落时，为保证光储系统的并网安全，基于逆变器运行约束构建安全运行域，并提出输出控制策略。阐述正、负序分离的控制原理，在满足并网标准规定的无功电流基础上，以相电流幅值、相电压幅值和有功波动幅值为约束，构建各工况下的安全运行域；提出正、负序有功电流固定比例控制和最大化输出有功控制策略，满足并网要求且提升系统的稳定性。基于Matlab/Simulink仿真平台，构建光储系统仿真模型，验证所提策略的有效性。更多还原

【Abstract】 In order to ensure the safe operation of the photovoltaic storage system, novel output control strategies are proposed and corresponding safe operation domains are constructed, as considering the cases that the voltage on the grid side drops asymmetrically. The control principle of positive and negative sequence separation is simply elucidated at first. Safe operation domains under each working condition are constructed, which are constrained by phase current amplitude, phase voltage amplitude and active fluctuation amplitude and meet the reactive current specified in the grid-connected standard. A fixed proportion control strategy for positive and negative sequence active current and a strategy for maximizing output active power control are proposed to satisfy the grid connection requirements and improve system stability. A simulation model of optical output system is created on Matlab/Simulink simulation platform, whose running results verify the effectiveness of the proposed strategy.更多还原