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一种集成锁相环的同步坐标系多变量控制器以增强三相并网逆变器在弱电网下的性能

A Multivariable Controller in Synchronous Frame Integrating Phase-Locked Loop to Enhance Performance of Three-Phase Grid-Connected Inverters in Weak Grids

语言:

中文摘要

本文提出了一种同步参考坐标系下的新型电流控制器及其设计方法,旨在提升三相并网逆变器在弱电网条件下的运行性能。现有控制器在高阻抗电网条件下表现不佳,易因锁相环与逆变器控制器的交互作用导致振荡及失稳。该研究通过多变量控制策略有效增强了系统的稳定性与鲁棒性。

English Abstract

This article presents a new current controller in the synchronous reference frame and its associated design for enhancing the performance of three-phase grid-connected inverters, especially against weak-grid conditions. The existing controllers do not perform strongly during high-impedance grid conditions and lead to oscillations and instability issues due to the interactions between the synchroni...
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SunView 深度解读

该研究直接针对阳光电源组串式及集中式光伏逆变器在弱电网(高阻抗)环境下的并网稳定性痛点。随着全球光伏装机容量提升,电网强度普遍下降,该多变量控制策略可有效抑制锁相环与控制回路间的耦合振荡,提升逆变器在复杂电网环境下的适应能力。建议研发团队将其集成至iSolarCloud智能运维平台下的高级控制算法库中,并应用于大型地面电站及工商业逆变器产品,以增强产品在弱电网区域的竞争力,减少因电网波动导致的停机风险。