电力电子混杂系统多模态谐振机理及其多功能复合有源阻尼抑制技术

项目名称： 电力电子混杂系统多模态谐振机理及其多功能复合有源阻尼抑制技术

项目编号： No.51277086

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 电工技术

项目作者： 戴珂

作者单位： 华中科技大学

项目金额： 81万元

中文摘要： 电能质量问题由电源、线路和负载共同产生，并联型电能质量调节装置能够补偿无功和抑制谐波。大部分研究主要针对实验室典型应用环境：电源短路容量大，线性、非线性阻感型负载。但是，实际现场应用环境复杂：电源等效内部阻抗非线性，存在以无功补偿电容器组、无源电力滤波器、电磁干扰抑制电容器、电压源型非线性负载等为代表的容性负载。各种线性、非线性容性负载容易产生混杂系统多模态谐振，谐振频段可能与补偿频段部分重叠，形成正反馈导致谐波放大，必须实施适时、适式的有源阻尼控制。本项目拟搭建模块化多电平变换器和动态电容器实验样机，研究混杂系统参数辨识方法与多模态谐振产生机理，探索对电压源型非线性负载的极限补偿能力，获得分别基于谐波虚拟电阻方法、谐波电流分解技术以及谐波能量闭环调节方式的三种多功能复合有源阻尼抑制技术，以及利用电力电子技术对无功补偿电容器组进行改进形成动态电容器以提升无功补偿、谐波抑制和谐振阻尼性能。

中文关键词： 谐波抑制；谐振阻尼；有源电力滤波器；模块化多电平变换器；动态电容器

英文摘要： All power quality problems come from the interaction between power source, line and load. In general, shunt power quality conditioner is used to compensate reactive and harmonic currents. Most researches are carried out in ordinary laboratory supposing strong power supply with big enough short circuit capacity and linear/nonlinear load combination with resistor and inductor. However, the electrical environment in actual site for shunt conditioner is really complicated. For example, the equivalent internal impedance of power source is nonlinear. In addition, there are kinds of capacitive loads such as power capacitor bank for var compensation, passive power filter, distributed capacitors for EMC (electromagnetic compatibility) and voltage source type diode rectifier. All of these linear/nonlinear capacitive loads may trigger multimode resonance in power electronic hybrid system. The compensation band of the conditioner may be overlapped partly by the resonant band of the whole system, which will induce positive feedback and harmonic amplification. Therefore, the multimode resonance should be damped actively by suitable damping control strategy in time. In this proposal, by means of MMC (modular multilevel converter) setup and dynamic capacitor prototype, both parameter identification method and multimode resonanc

英文关键词： Harmonic Suppression；Resonance Damping；Active Power Filter；Modular Multilevel Converter；Dynamic Capacitor