蒙古输电网SVC场谐波测量与计算机仿真

Choidorj Adiyabazar, M. Acosta, F. Gonzalez-Longatt
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引用次数: 0

摘要

静态无功补偿器主要由晶闸管控制电抗器(TCR)和固定电容(FC)组成。2020年,SVC装机容量为30 MV Ar,接入蒙古电力系统(MPS)的南方能源系统(SES)。SVC的主要目的是补偿无功功率,提高电压稳定性,减少电压波动。然而,由于可控硅的发射角控制,TCR产生了高水平的谐波电流。因此,有必要确定SVC产生的谐波对电力系统及其组成部分的影响。为了进行这些分析,需要确定SVC连接点电网的谐波特性、现有的谐波水平以及有关电力系统中可接受的谐波水平的适当标准。为了计算和设计谐波,需要在仿真软件中建立精确的谐波模型。例如,DIg SILENT PowerFactory的6脉冲变换器模型没有考虑系统不平衡的相位角。因此,谐波角度建模、测量仪器、各种波形分析的重要性是所有工程师都感兴趣的。因此,本文认为谐波模型是实际系统测量的谐波电流相角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Field Harmonics Measurements and Computer Simulation of an SVC at the Mongolian Transmission Network
The static var compensator (SVC) mainly consists of a thyristor-controlled reactor (TCR) and a fixed capacitor (FC). In 2020, the install capacity of SVC was 30 MV Ar, which was connected to the South Energy System (SES) of the Mongolian power system (MPS). The primary purpose of the SVC is to compensate reactive power, increase voltage stability and reduce voltage fluctuations. However, TCR generates a high level of harmonic currents because of the thyristor's firing angle control. Therefore it is necessary to determine the effect of harmonics generated by the SVC on the power system and its components. To perform these analyses, it is needed to determine the harmonic characteristics of the grid at the point of SVC connection, existing levels of harmonics, and appropriate standards regarding acceptable harmonic levels in the power system. To calculate and design harmonics, an accurate harmonic model should be created in the simulation software. For example, the 6-pulse converter model of the DIg SILENT PowerFactory has not considered phase angles for unbalancing the system. Hence, the importance of modelling angles of the harmonics, measuring instrument, analysis of various waveforms are of interest to all engineers. Hence, in this paper, a harmonic model is considered harmonic current phase angles measured by a real system.
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