【作者】 王刚；

【导师】 罗安；

【作者基本信息】 湖南大学 ， 电气工程， 2012， 硕士

【摘要】 注入式混合型有源电力滤波器（injection type hybrid active power filter, IHAPF)由于可以对配电网中的谐波进行动态治理，同时补偿大容量的无功功率，因而得到广泛使用。然而，由于IHAPF采用基波谐振支路降低了有源部分承受的基波电压，有源滤波器难以从电网中获得能量来稳定直流侧电压。故工程应用中常采用不可控整流电源来给有源滤波器的直流侧供电。当电网电压波动或电网频率偏移时，IHAPF的基波谐振支路的谐振点将会发生偏移，基波谐振支路产生震荡，对有源滤波器的直流侧冲击较大。由于IHAPF采用不可控整流电源供电，并未对有源滤波器的直流侧电压进行控制，存在安全隐患，严重的降低了整个设备的可靠性。现场运行过程中，多次发生有源电力滤波器损坏及不可控整流电源爆炸事故，因此迫切需要对该结构进行改进，使其更好的应用到工程中去。本文以广西某变电站35kV高压配电网的谐波抑制以及无功补偿项目为背景，根据现场的工况分析，给出了具体的解决方案，并做了以下几个方面的研究：针对传统的IHAPF的不足，提出了一种新型注入式混合型有源电力滤波器（Novelinjection type hybrid active power filter，N-IHAPF）。本文对其拓扑结构、运行机理、谐波抑制原理、有源部分注入能力以及控制系统稳定性进行了分析，并给出了N-IHAPF系统的注入支路参数优化设计方法。通过对N-IHAPF系统的结构及运行机理的分析，提出了基于有限次谐波检测的改进i p iq检测算法。该方法可以有效的降低有源部分的容量，同时避免APF与无源滤波器之间的谐波环流。针对传统的电网基波电压相位获取方法的不足，本文提出了一种采用基于电网电压定向的相位获取法。该方法不依赖于元件的具体参数，检测精度高。针对N-IHAPF系统的控制问题，本文采用基于无差拍控制的电压电流双闭环控制方法。仿真结果表明该方法可以有效的实现有源滤波器的直流侧稳压并具有较好的动态跟踪效果。在此基础上，研发了一套适用于高压配电网电能质量治理的N-IHAPF系统。N-IHAPF系统现场投运后，变电站的35kV高压配电网的电能质量得到了极大的改善，完全符合设计要求。更多还原

【Abstract】 The injection type hybrid active power filter(IHAPF) is widely used, owing to itcan suppress the harmonics dynamically and compensate large capacity of reactivepower in the mean time. However, as the injection type hybrid active power filterreduces the active part’s fundamental voltage with fundamental resonance branch, theactive power filter is difficult to get enough energy from the grid to maintain thestability of the DC voltage, so the non-controlled rectifier is often used to supply theenergy of DC side practically. When the grid voltage fluctuates or frequency drifts,the fundamental resonance point of the injection type hybrid active power filter slips,and the fundamental resonance branch shocks, which impact the DC side of activepower filter greatly. As the injection type hybrid active power filter is supplied withnon-controlled rectifier, without the control of DC voltage, which is a security risk,and reduces the reliability of the entire device. Active power filter damaged andnon-controlled rectifier power explode are running several times, there is an urgentneed to improve the structure, to make a better application in projects.With the background of the harmonic control and reactive power compensationprojects in a substation of35kV high voltage distribution network, basing on theanalysis of the condition,the solutions are presented in this paper. The emphasis andachievement of the paper mainly manifests in the following aspects:a novel injectiontype hybrid active power filter(N-IHAPF) was proposed in this paper, aiming on theshortage of the traditional injected type hybrid active power filter. The analysis ofnovel injection type hybrid active power filter’s topology, operating mechanism,harmonic control principle, active power filter’s injectability and the stability ofcontrol system are carried out. Parameters optimization design method is also given inthis paper. With the analysis of the structure and operation mechanism, the improvedi p iqdetection algorithm is proposed,basing on the harmonic detection with limitedtimes.This method can effectively reduce the capacity of the active part, and at thesame time avoid the harmonic circulation between APF and PPF.Aiming on theshortage of the traditional method to get the fundamental voltage phase for power grid,this paper proposes a novel method, basing on the grid voltage phase directional. Thismethod has high accuracy and doesn’t rely on the accurate parameters ofcomponents.Aiming on the control strategy of the novel injection type hybrid active power filter, this paper adopts the voltage and current dual-loop control method,basing on the deadbeat control.The simulation results show that this method canmaintain the stability of the DC voltage and has good dynamic tracking performance.On this basis, we developed a novel injection type hybrid active power filter forthe power quality control of high voltage distribution network. The operation resultsof the novel injection type hybrid active power filter show that the35kV high voltagedistribution network’s power quality has been improved greatly and fully comply withdesign requirements.更多还原