基于统一潮流控制器的汽轮发电机与海上风电场混合系统次同步共振阻尼

Li Wang, Shi-Ying Zeng, Wen-Kai Feng, A. Prokhorov, H. Mokhlis, Chua Kein Huat
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引用次数: 8

摘要

本文提出了一种统一潮流控制器(UPFC),用于抑制通过串联电容补偿线连接到无限母线的混合发电系统中发生的次同步谐振(SSR)。该混合发电系统包括一个蒸汽涡轮发电机(STG)和一个基于双馈感应发电机(DFIG)的海上风电场(OWF)。推导了三相平衡负载条件下的d-q轴等效电路模型,建立了包括STG组、基于dfig的OWF、串联电容补偿线、UPFC等完整的系统模型。采用基于模态控制理论的极点配置方法设计了UPFC的阻尼控制器,有效地抑制了系统的不稳定STG模态。系统地完成了系统的小信号稳定性和暂态仿真结果。仿真结果表明,所提出的UPFC与所设计的阻尼控制器相结合,可以有效抑制所研究电力系统的不稳定STG模式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Damping of Subsynchronous Resonance in a Hybrid System with a Steam-Turbine Generator and an Offshore Wind Farm Using a Unified Power-Flow Controller
This paper proposes a unified power-flow controller (UPFC) to suppress subsynchronous resonance (SSR) occurred in a hybrid power-generation system connected to an infinite bus through a series-capacitor compensated line. The hybrid power-generation system contains a steam-turbine generator (STG) and an offshore wind farm (OWF) based on doubly-fed induction generator (DFIG). The d-q axis equivalent-circuit model under three-phase balanced loading conditions is derived to establish the complete system model including the STG set, the DFIG-based OWF, the series-capacitor compensated line, the UPFC, etc. A damping controller of the proposed UPFC is designed by using pole-assignment approach based on modal control theory to effectively damp out unstable STG modes of the studied system. Both small-signal stability and transient simulation results of the studied system are systematically performed. The simulation results show that the proposed UPFC joined with the designed damping controller can effectively suppress unstable STG modes of the studied power system.
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