【作者】 鲍鹏；

【导师】 王奔；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2009， 硕士

【摘要】 统一电能质量调节器(UPQC)是从有源电力滤波器(APF)发展而来的。它将串联有源滤波器和并联有源滤波器结合起来,从而可以充分发挥串、并联有源滤波器在电力系统应用中的优势,具备综合的电能质量调节功能。在电能质量问题日益严重的今天,UPQC无疑拥有着广阔的应用前景。本文首先对电网中的电能质量问题进行了说明,然后简要介绍了有源滤波技术的发展和现状,并在此基础上,对UPQC的拓扑结构和补偿原理进行了分析。接着,针对影响UPOC补偿效果的两个重要环节——检测和控制方法,进行了较为详细的研究和探讨。在检测方面,对当前谐波检测的各类方法进行了介绍和比较,并在此基础上,结合UPQC的补偿思想,理论推导了基于Park变换的UPQC电压电流综合检测算法。在畸变量不含谐波时,对检测方法做了改进,使检测的实时性更好。对检测方法进行了相应的仿真研究,以验证其有效性。在控制方法上,首先对现有的滞环控制和三角载波比较控制进行了说明,然后对UPQC的数学模型进行了详细的推导和分析。在dq坐标系下,UPQC的数学模型是一个耦合的非线性系统,针对该系统,本文采用了两种方法来设计控制器,一种是采用PI调节的前馈解耦控制方法,另一种是采用逆系统解耦的变结构控制方法。最后对这两种方法进行仿真比较。UPOC直流侧电容电压的稳定是由PI调节来实现的。更多还原

【Abstract】 The Unified Power Quality Conditioner(UPQC)is an evolvement of The Active Power Filter (APF). It can bring the advantages of both the series active filter and the shunt active filter into play in power system, which provides comprehensive power quality compensations, by combining the series part with the shunt part. For this reason, it is considered to have extensive prospect nowadays when power quality problem is more seriously concerned.Power quality problem in the system is recounted firstly in this thesis, the development and actuality of APF are introduced afterward, in the basis of which, this thesis explains the topology and the function of the UPQC. Then, the detection method and the control strategy, which are the important parts affecting the compensation effect of the UPQC, are discussed and investigated in detail.In the detection part, several kinds of methods are introduced and compared with. Integrating the compensating theory of the UPQC, this paper deduces the detecting method of voltage and current based on Park transformation in theory. The method is improved on to get the detection results in good time when the harmonics are not included in the abnormal content. Then, some relevant research is done in simulation to testify the validity of the detecting method.In the control part, the hysteresis control and the triangle carrier wave control are firstly introduced. Afterward, the model of UPQC is deduced detailedly. Considering that UPQC is a coupling nonlinear system in synchronous rotating dq coordinate system, two methods are adopted to design the controller. One is state-feedback decouple control method with PI adjustment, while the other is variable structure control method using inverse-system technique. Some relevant research and comparison are made in simulation.The stabilization of capacitance voltage in the direct current side is realized by PI control.更多还原