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Study On The Influence Of PV Grid-connected System On Relay Protection

Posted on:2017-11-26Degree:MasterType:Thesis
Country:ChinaCandidate:K WangFull Text:PDF
GTID:2322330512953742Subject:Control engineering
Abstract/Summary:PDF Full Text Request
Entering the 21 st century, fossil fuel reserves are getting lower and lower, new energy development and research more and more attention. As the solar energy with environmental protection, pollution-free, sustainable development and other favorable advantages of gradually becoming the new energy field in the development of the highest level, the most mature, the most widely used renewable energy.Solar photovoltaic power generation is the world’s largest application of distributed power. With the photovoltaic power generation and the network, the total distribution network to bring a greater impact, the normal operation of the system to bring a series of technical problems, this paper on the distribution of photovoltaic power system voltage distribution, automatic reclosing, electrical automation and the impact of relay protection made an analysis and discussion.In this paper, the concept of photovoltaic power generation, classification, and the way and the current research and development of the status quo were combed. The grid-connected photovoltaic power generation system model is established. The photovoltaic power generation grid-connected system model is built up by MATLAB/ SIMULINK software platform, including photovoltaic cell, maximum power point tracking model and inverter module. The simulation results show the effectiveness of the photovoltaic cell, the maximum power tracking algorithm and the system model.The influence of PV grid-connected system on the power flow and voltage distribution of distribution network is analyzed. The influence of PV system on the distribution network voltage and current distribution in different positions and capacities and operating conditions was studied. The technical measures and control strategies of reactive power regulation and voltage regulation were put forward according to the law of influence. Finally, the influence of PV system on short-circuit current under fault condition is studied. The influence of different access position,different capacity and different fault location of PV system on short-circuit current and line protection are analyzed.
Keywords/Search Tags:PV grid-connected system, distribution network, relay protection, distribution automation
PDF Full Text Request
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