一种快速跟踪功率参考值的光伏并网低电压穿越控制策略
摘要:为了解决传统光伏并网低电压穿越控制策略动态响应慢导致直流母线电压失稳的问题，提出了一种基于图形法和模型预测控制的快速跟踪功率参考值的低电压穿越策略。该策略首先根据网侧电压跌落程度，算出交直流侧的参考功率，然后直接控制光伏阵列和逆变器输出相应参考功率，达到交直流侧的快速平衡。仿真结果表明，当功率参考值发生改变时，传统控制策略直流侧响应时间为200 ms，交流侧有功响应时间为16.5 ms，无功响应时间为17 ms，而本文所提策略响应时间为5.000、0.140、0.135 ms，验证了所提控制策略的快速性。
Abstract：In order to solve the problem of DC bus voltage instability caused by slow dynamic response of traditional grid-connected PV low voltage crossing control strategy, a fast tracking power reference value low voltage crossing strategy based on graph method and model predictive control is proposed. The strategy firstly calculates the reference power of the AC and DC side according to the voltage drop degree of the grid side, and then controls the photovoltaic array and the inverter to output the corresponding reference power to achieve the fast balance of the AC and DC side. The simulation results show that when the power reference value changes, the response time of the traditional control strategy is 200 ms on the DC side, 16.5 ms on the AC side, and 17 ms on the reactive side, while the response time of the strategy proposed in this paper is 5.000, 0.140, 0.135 ms, which verifies the speediness of the proposed control strategy.
标题：一种快速跟踪功率参考值的光伏并网低电压穿越控制策略
title:A Low Voltage Traversal Control Strategy for Grid-Connected PV Based on Fast Tracking of Power Reference Values
作者：黎泽宇,苏小玲
authors:LI Zeyu,SU Xiaoling
关键词：两级式光伏并网,快速跟踪功率参考值,动态响应,控制策略,低电压穿越,
keywords:two-stage grid-connected PV,fast tracking power reference value,dynamic response,control strategy,low voltage crossing,
发表日期：2023-11-17
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