【作者】 张静刚；

【导师】 曾光；

【作者基本信息】 西安理工大学 ， 电力电子与电力传动， 2008， 硕士

【摘要】 本文首先介绍了动态无功补偿技术、国内外研究开发和应用情况以及在电网应用中所发挥的作用和功能,简要分析了用于不平衡系统的无功补偿器的基本原理和工作特点。在深入分析了对称化补偿原理的基础上,推导出用于SVC的数字化无功补偿算式。针对TCR的非线性特点,设计了PI调节器;根据控制电路与TCR电路的特点,推导出系统的数学模型,为PI调节器的设计提供理论依据;利用MATLAB的SIMULINK仿真环境对所设计的PI调节器进行仿真。采用以工控机为控制核心的硬件控制平台,包括采样电路、滤波电路、触发同步电路等外围电路,编制相应的软件,完成了试验样机的联调。仿真和实验结果证明采用PI控制算法的SVC控制器不仅可实现对电压、无功功率、等多个因素的综合补偿,而且具有较好的响应速度和补偿精度。总的看来,具有一定的先进性和合理性,可应用于工程实践。论文的最后,给出了试验装置各部分的实测波形。更多还原

【Abstract】 The development of Var compensation technology research and development in recent years is given in this paper international situation as well as the function which displays in the electrical network application, analyzed briefly has used in the balanced system the idle work compensator basic principle and the work characteristic. In has thoroughly analyzed in the symmetries compensation principle foundation, infers uses in SVC the digitized idle work compensation mathematical formula. The design of the PI controller is provided which aims to the nonlinear character of the system. According to the controlling circuit and the TCR circuit the mathematic model is established which can provide the academic gist for the design of PI controller. The two controlling methods are compared by simulating in SIMULINK environment of MATLAB software. The hardware control system based on industrial computer is designed, which includes sampling circuit, filter circuit, phase. Compensated circuit and so on. The program of the system is compiled and a prototype is made and tested. The simulation and experimental results show that the SVC with PI controller can compensate Var on real time for unbalanced load which has fleetly reaction, preferable controlling precision and robust character. In a word, the PI controlling method can be used in the project which is reasonable and advanced. In the end of this paper, the corresponding real waves with Var compensation are provided.更多还原