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静止同步补偿器(STATCOM)与含串补弱交直流输电系统间的次/超同步相互作用

Sub- and Super-Synchronous Interactions Between STATCOMs and Weak AC/DC Transmissions With Series Compensations

语言:

中文摘要

随着电力电子变换器大规模接入,变换器与电网间的交互引发了新型振荡问题。本文研究了南方电网中发现的STATCOM与弱交直流电网之间的新型次/超同步相互作用(S2SI),揭示了此类振荡的机理,为电力电子设备在复杂电网环境下的稳定运行提供了理论支撑。

English Abstract

With the increasing integration of power electronic converters into the power system, the interactions between converters and their adjacent transmissions bring emerging oscillation issues. A new type of sub- and super-synchronous interactions (S2SI) between STATCOMs and the weak AC/DC grid were detected in China Southern Grid. As an oscillation incident never reported before, as far as the author...
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SunView 深度解读

该研究涉及电力电子设备在弱电网下的稳定性问题,对阳光电源的组串式/集中式光伏逆变器及储能变流器(PCS)业务具有重要参考价值。随着新能源渗透率提升,电网强度降低,逆变器与电网的交互振荡风险增加。建议研发团队在控制策略中引入阻抗重塑技术,优化锁相环(PLL)参数,并积极探索构网型(GFM)控制算法,以增强设备在弱电网下的适应性。此外,该研究成果可用于优化iSolarCloud平台的电网监测功能,提前预警潜在的振荡风险,保障电站安全稳定运行。