有源配电网分布式保护方案及装置实现

发布时间：2018-05-26 03:18

本文选题：有源配电网 + 分布式电源　；参考：《山东大学》2017年硕士论文

【摘要】：随着世界能源、环境问题日益突出,作为清洁能源的一种高效利用方式,分布式电源(DG,Distributed Generation)被越来越多的接入到配电网中。DG的接入在为配电网带来诸多优势的同时,也给配电网的保护与控制带来了全新的挑战。因此,积极开展有源配电网保护与控制技术研究,开发实际有效的有源配电网保护与控制装置,将具有良好的应用前景。论文所作的主要工作如下:(1)提出了基于智能终端(SmartTerminal Unit,STU)对等通信的有源配电网分布式智能保护控制方案。该方案包括分布式馈线故障定位、隔离及恢复方法;考虑分布式电源低电压穿越的防孤岛保护方案;以及一种基于TCP/IP协议的网络拓扑识别方法。在馈线上发生故障时,通过智能终端间的信息交互,可以快速地完成馈线故障的隔离及非故障区段的供电恢复;对于有源配电网运行中可能出现的非计划孤岛运行情况,通过馈线及公共耦合点(Point of Common Coupling,PCC)智能终端间的相互配合,可以实现对分布式电源低电压穿越、防孤岛保护以及馈线故障自愈的综合控制。(2)开发出有源配电网分布式保护控制样机。保护样机硬件由微处理器、现场可编程逻辑阵列(FPGA)、模数转换器(ADC)以及存储器等构成,具有强大的数据处理能力,为分布式保护控制程序提供了有力支持。基于层次化、模块化和多任务的软件设计理念,设计了实现有源配电网分布式保护控制功能的高级应用程序,可实现数据处理、保护控制、防孤岛保护等多项功能。(3)利用RTDS搭建了有源配电网测试模型,完成对所开发保护样机的闭环测试。根据现场实际参数,搭建了含逆变型DG的有源配电网系统模型,针对不同故障条件,对4台有源配电网保护样机进行了功能及性能测试。测试结果表明,所提分布式保护控制方案能够满足有源配电网快速故障自愈的要求;所开发保护样机性能稳定,动作可靠,具有一定的工程应用前景。
[Abstract]:With the increasingly prominent energy and environmental problems in the world, as a kind of efficient use of clean energy, DGG distributed Generation (DG) has been more and more connected to the distribution network. DG has brought many advantages to the distribution network at the same time. It also brings a new challenge to the protection and control of distribution network. Therefore, the active distribution network protection and control technology research, the development of practical and effective active distribution network protection and control devices, will have a good application prospects. The main work of this paper is as follows: (1) A distributed intelligent protection control scheme for active distribution network based on Smart Terminal Unit Unit (STU) peer-to-peer communication is proposed. The scheme includes distributed feeder fault location, isolation and recovery method, anti-islanding protection scheme considering low voltage traversing of distributed power supply, and a network topology identification method based on TCP/IP protocol. When the fault occurs on the feeder line, the isolation of the feeder fault and the recovery of the power supply in the non-fault section can be completed quickly by the information exchange between the intelligent terminals, and for the unplanned isolated island operation situation that may occur in the operation of the active distribution network, The low voltage traversing of distributed power can be realized through the mutual cooperation between the feeder and the common coupling point Point of Common coupling PCCs. The distributed protection control prototype of active distribution network is developed. The hardware of the protection prototype is composed of microprocessor, FPGA, A / D converter ADCand memory. It has powerful data processing ability and provides powerful support for distributed protection control program. Based on the idea of hierarchical, modular and multi-task software design, the advanced application program is designed to realize the distributed protection control function of active distribution network, which can realize data processing and protection control. Using RTDS, the active distribution network test model is built, and the closed-loop test of the developed prototype is completed. According to the actual field parameters, the active distribution network system model with inverter DG is built, and the function and performance of four active distribution network protection prototypes are tested according to different fault conditions. The test results show that the proposed distributed protection control scheme can meet the requirements of fast fault self-healing of active distribution network, and the developed prototype has stable performance, reliable operation and has a certain engineering application prospect.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM77

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