【作者】 王连符；

【导师】 肖峻；

【作者基本信息】 天津大学 ， 电力系统及其自动化， 2007， 硕士

【摘要】 配电网的谐波抑制和无功补偿是一个比较新的研究和实践领域,随着对电能质量要求不断提高,这一领域愈加引起电力工作人员的重视。由于静止同步补偿器(STATCOM)比静止无功补偿器(SVC)具有响应快、提高电压暂态稳定性效果好以及谐波含量低等优点,STATCOM的应用已迅速从输电网扩展到配电网,即配电静止同步补偿器(DSTATCOM),DSTATCOM代表了配电网的谐波抑制和无功补偿技术的发展方向。本文围绕直接电流控制的DSTATCOM的设计和应用展开研究,主要内容如下:1、DSTATCOM设计方面对于变流器的拓扑结构,采用各相桥的两支路由不同类型的电力电子器件组合而成的新结构,同时采用分时处理技术驱动相并联的器件,这种设计方案提高了基本单元变流器的输出精度和可靠性。为提高无功电流的实时检测精度,用基于park变换的电压电流综合检测法(即id-iq法)取代需用锁相环的ip-iq法。应用电力电子仿真软件PSIM6.0,对基于新型拓扑结构DSTATCOM的运行进行仿真,仿真结果证明了新型拓扑结构以及相应测控方法的正确性和有效性。2、DSTATCOM应用方面对DSTATCOM与电容器并联应用方案即容性混合DSTATCOM,提出了DSTATCOM参数选择方法以及串接电抗器的电容器参数选择方法,并给出相应实例。更多还原

【Abstract】 Reactive power compensation and harmonic suppression of distribution network is a quite new research and practical domain, and along with unceasing enhancement of customer demand for electrical energy quality, it has caused more attention. Because STATCOM has more merits than SVC, such as responding much faster、the effect of raising voltage momentary stability better and with less harmony, it has been applied from transmission network to distribution network(namely DSTATCOM) now. At present, DSTATCOM has represented development direction of reactive power compensation and harmonic suppression of distribution network.This thesis revolves design and application of the direct electric current control DSTATCOM.The main contents are as follows:1. Design of DSTATCOMFirstly, In order to enhance precision and reliability of high power convert,A novel circuit structure of hybrid-type-component is established, and time-sharing method is added to parallel-connected devices.Secondly, In order to enhance the precision of real-time measure of reactive current, id-iq method is used in the place of ip-iq method.Based on these designs, a series of simulations are performed, and the simulation results have proved all above feasible and effective .2. Application of DSTATCOMParameter selection method for STATCOM parallel-connected by capacitor(or capacitor series-connected with reactor) is proposed with corresponding example.更多还原