宽频域谐波谐振劣化机理及其抑制措施  

Resonance Degradation Mechanism of Wide-Band Frequency Harmonics and the Elimination Strategy

作　　者：帅智康[1] 肖凡[1] 涂春鸣[1] 沈征[1] 尹新[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《电工技术学报》2013年第12期16-23,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金青年基金(51207048);国家自然科学基金(51377051);湖南省自然科学基金(11JJ2023)资助项目

摘　　要：随着智能电网的大力发展以及变流技术的大量使用,电网的谐波特征将由过去的较低频谐波为主,特定次谐波含量较多这一特点逐渐呈现为宽频域特征,系统高压长距离输电线路分布电容与变压器杂散电容的影响不容忽视。本文在分析智能电网谐波问题新特征的基础上,对高频次、宽频带谐波引起的谐波谐振等劣化问题进行了详细研究。建立了考虑输电线路分布电容与变压器杂散电容时的电流型谐波与电压型谐波谐振劣化问题分析模型,揭示了宽频域谐波谐振的内在机理。现场实际测试数据验证了本文理论分析的正确性。最后根据智能电网宽频域谐波的特点,提出了针对宽频域谐波特点的谐波治理拓扑及其控制策略,仿真结果表明了本文所提出治理措施的正确性。With the development of smart grid, PWM control technique is widely used, which leads to wide-band frequency harmonics. The influence of capacitor of long-distance high-voltage transmission line and power transformer can not be neglected any more. Based on the analysis of new features of harmonic problems in smart grid, the harmonic resonance deterioration problem caused by high-frequency and wide-band frequency harmonics is studied in this paper. The analysis model of harmonic resonance degradation problem is established when the influence of transmission line and power transformer is considered, which reveals the inherent mechanism of resonance degradation problem. Experimental results validate the validity of the theoretical analysis. Then, a reasonable topology and control strategy for the characteristics of smart grid broadband domain harmonic is proposed. Simulation results analvze the validitv of this topology and control and control strategy in this paper.

关 键 词：电能质量 宽频域谐波 谐波谐振 分析方法 

分 类 号：TM13[电气工程—电工理论与新技术] TM76