Applying Synchronous Condenser for Damping Provision in Converter-dominated Power System

Journal of Modern Power Systems and Clean Energy

Ha Thi Nguyen¹  Arne Hejde Nielsen¹  Bikash Pal²  Peter Hojgaard Jensen³  Guangya Yang⁴ 

[1] Danmarks Tekniske Universitet,Department of Electrical Engineering,Roskilde,Denmark;Imperial College London,Department of Electrical and Electronic Engineering,London,UK;Siemens AG Sektor Energie,Ballerup,Denmark;Technical University of Denmark,Electrical Engineering,Lyngby,Denmark;

关键词: Power oscillation;    Prony analysis;    low-inertia system;    supplementary controller;    synchronous condenser (SC);   

DOI  :  10.35833/MPCE.2020.000207

来源: DOAJ

【 摘 要 】

The dynamic characteristics of converter-dominated systems are governed by controlling power converters and the interactions between converter systems and conventional alternators. Frequency oscillations can appear under dynamic operation conditions caused by the phase-locked loop dynamics and interactions among the converter control systems. The oscillations may be poorly damped, which can result in reduced power generation, longer settling time, or disconnections of sensitive components. It is foreseeable that damping services will be critical for power grid stabilization in the future with high penetration of renewable generation. In this work, synchronous condensers (SCs) are evaluated and applied to provide damping services to the power grid under post-event conditions. An innovative supplementary controller for the automatic voltage regulator of SCs is proposed to improve the frequency stabilization in a converter-dominated system after disturbances. Using local and remote measurements, SCs are able to modulate the reactive power output and hence, the terminal bus voltage, which further impacts the power flow in the system; therefore, damping can be provided to the frequency oscillations. The control is implemented on an industrial-level hardware platform, and the performance is verified by the hardware-in-the-loop simulation.

【 授权许可】

Unknown