110kV湖润变电站注入式混合型有源滤波器的研制

发布时间：2018-02-12 15:41

本文关键词： 注入式有源滤波器谐波功率电压平方实时数字仿真工程应用　出处：《湖南大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文以 35kV混合型有源电力滤波器关键技术及工程应用‖项目为背景，针对我国在中高压配电网的动态谐波抑制技术的不足和无功功率补偿技术水平有待提高的现状，研制了适用于110kV湖润变电站35kV母线负荷特性的注入式混合型有源电力滤波器（Hybrid Active Power Filter with Injection Circuit：HAPFIC）。论文对110kV湖润变电站近5年来的谐波污染情况、无功补偿情况、功率因素、电压水平以及故障发生情况等多方面进行了分析，提出了在变电站35kV母线处对无功和谐波进行集中治理的补偿方案。介绍了HAPFIC的拓扑结构，建立其谐波域等效电路，从理论上分析了其滤波原理，提出了利用谐波有功功率来稳定直流侧电压的方法；提出了谐波电压矢量定向的相位获取法和以电压平方为控制量的直流侧电压的快速跟踪控制方法；推导了电流内环的无差拍跟踪控制策略，建立了HAPFIC整体控制策略框图，并通过与传统PI控制方法对比仿真,验证了本文所提控制策略的正确性和有效性。提出了35kV注入式混合型有源电力滤波器成套装置的RTDS闭环仿真试验技术，开展了装置的控制与保护单元在正常运行工况、检修工况、故障工况等不同运行条件下的RTDS实物闭环仿真试验。提出了HAPFIC装置控制与保护单元的RTDS闭环仿真试验整体方案，搭建了RTDS闭环试验模型，并对模型进行了基波潮流验证。提出了在10kHz高频脉冲模式下，RTDS虚拟IGBT开关器件与控制单元接口电路的交互响应策略和IGBT触发脉冲信号重组并构成控制字的技术。验证了HAPFIC装置的谐波治理效果和无功补偿效果，控制与保护单元的动态性能，为装置的设计、调试、现场投运等工作提供了有力的依据。在HAPFIC系统理论研究的基础上，研制出35kV注入式混合型有源电力滤波器成套装置，，并在110kV湖润变电站进行了试点应用。装置现场投运结果表明，投运后35kV公用电网连接点的功率因数明显提高，谐波电流和谐波电压从严重超标降低到远低于国标限值，困扰变电站多年的谐波和无功问题得到了根治，站内设备的无功和谐波损耗显著降低，产生了显著的经济和社会效益。实践证明，本文研制的HAPFIC装置能满足高压配电网无功功率补偿和谐波电流抑制的要求，证实了文中提出的直流侧电压快速跟踪控制方法和电流内环无差拍跟踪控制策略的正确性、有效性和可行性。不仅为变电站的优质供电、节能降耗、降低设备事故率做出了突出贡献，同时给变电站所在供电区域的经济发展带来了深远的有利影响。
[Abstract]:In this paper, based on the key technology of 35kV hybrid active power filter and the project of engineering application, aiming at the deficiency of dynamic harmonic suppression technology and the technical level of reactive power compensation in the medium and high voltage distribution network in China, the technical level of reactive power compensation needs to be improved. A hybrid Active Power Filter with Injection circuit: hybrid Active Power Filter with Injection circuit for 35kV bus load characteristics in 110 kV Hurun substation has been developed. In this paper, the harmonic pollution, reactive power compensation, power factor, voltage level and fault occurrence of 110kV Hulun substation in recent 5 years are analyzed. The compensation scheme for reactive power and harmonics at 35 kV bus in substation is put forward. The topological structure of HAPFIC is introduced, the equivalent circuit in harmonic domain is established, the filtering principle is analyzed theoretically, and the method of stabilizing DC side voltage by using active harmonic power is put forward. The phase acquisition method of harmonic voltage vector orientation and the fast tracking control method of DC side voltage with voltage squared as control quantity are proposed, the beat free tracking control strategy of current inner loop is deduced, and the block diagram of HAPFIC control strategy is established. The correctness and effectiveness of the proposed control strategy are verified by comparing with the traditional Pi control method. The RTDS closed-loop simulation test technology of 35kV injection hybrid active power filter is presented. The control and protection unit of the device is carried out under normal operation condition and maintenance condition. This paper presents the overall scheme of RTDS closed-loop simulation test of HAPFIC device control and protection unit, and builds the RTDS closed-loop test model. The model is verified by fundamental power flow, and the interactive response strategy of RTDS virtual IGBT switch and control unit interface circuit under 10kHz high frequency pulse mode is put forward, and the technology of IGBT trigger pulse signal recombination and construction of control word is presented. The harmonic control effect and reactive power compensation effect of HAPFIC device are verified. The dynamic performance of the control and protection unit provides a powerful basis for the design, debugging and field operation of the device. Based on the theoretical study of HAPFIC system, a 35kV injection hybrid active power filter is developed and applied in 110kV Hulun substation. After being put into operation, the power factor of the connection point of 35kV public power network has been obviously increased, the harmonic current and harmonic voltage have been reduced from serious overstandard to far below the national standard limit, and the harmonic and reactive power problems that haunt the substation for many years have been completely cured. The reactive power and harmonic loss of the equipment in the station are reduced significantly, and the economic and social benefits are remarkable. The practice shows that the HAPFIC device developed in this paper can meet the requirements of reactive power compensation and harmonic current suppression in high voltage distribution network. The correctness, validity and feasibility of the proposed DC side voltage fast tracking control method and current inner loop deadbeat tracking control strategy are verified, which not only provide high quality power supply for substation, but also save energy and reduce consumption. Reducing the accident rate of equipment has made a great contribution to the economic development of the power supply area in which the substation is located.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761;TM63

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