含多电压源型换流器配网的谐波问题研究

项目名称： 含多电压源型换流器配网的谐波问题研究

项目编号： No.51307061

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 电工技术

项目作者： 钟庆

作者单位： 华南理工大学

项目金额： 24万元

中文摘要： 随着基于电压源型换流器（VSC）的电力电子装备在现代配网中的应用日增，其产生的谐波及谐波在配网中的传播和相互耦合问题日趋复杂，对配网电能质量的影响越来越大，因此迫切需要深入研究含多VSC配网中的谐波问题，为构建优质配网提供重要理论支撑。本项目基于VSC序分量动态相量谐波分析模型，采用图论求解法精确量化VSC交直流侧电压电流各次谐波非线性相互作用关系，科学定量揭示VSC的谐波产生机理。基于VSC谐波产生机理，建立VSC的正、负和零序等值电路模型及研究序参数计算方法。利用VSC的等值电路模型建立含多VSC配网的谐波分析数学模型，探索其解析求解方法，揭示网络中谐波产生与传播耦合机理。在此基础上，充分利用含多VSC配网的特性，提出行之有效的谐波抑制策略，降低配网中的谐波含有率。从而建立含多VSC配网谐波问题研究的理论体系，推动VSC在配网中的应用。

中文关键词： 配网；电能质量；电压源型换流器；谐波；

英文摘要： With the more applications of power electronic devices based on voltage source converter (VSC) in modern distribution network, the production, propagation and interaction of harmonics caused by VSCs in the network become more complicated and put more significant effect on the power quality. The studies on the harmonics of distribution network with multiple VSCs are very important to construct the distribution network with high quality. Firstly, based on harmonic analysis model of VSC with the sequence dynamic phasors, the nonlinear interactions among voltage and current harmonics on ac and dc side are quantified and mechanism of the harmonic productions is discovered with the graph theory. Secondly, the equivalent circuits of VSC have developed on the positive, negative and zero sequences based on the quantified mechanism of the harmonic productions. Thirdly, the related harmonic analysis model of the distribution network with multiple VSCs is developed with the equivalent circuits of VSCs. The approaches to solve the network harmonic analysis model are researched to discover the harmonic propagations and interactions in the network. Finally, with the characteristics of distribution network with multiple VSCs, the effective strategies are given to mitigate the harmonics in the distribution network. The theories

英文关键词： Distribution Network；Power Quality；Voltage Source Converter；Harmonic；