光储型微电网运行控制仿真分析

发布时间：2018-04-14 09:37

本文选题：微电网 + 光伏发电系统　；参考：《东南大学》2015年硕士论文

【摘要】：随着环境问题日益严峻,人们对清洁能源并网技术进行了深入的研究。但是配电网的稳定性及电能质量等指标由于随机性高的可再生能源接入势必会降低,并带来其它不利影响。为了充分吸收可再生能源的能量并同时稳定电网,提出了微电网技术。微电网是由可再生能源、分布式发电及并网电力电子装置及控制机构组成的有机整体,既可以作为电网的可控负荷参与调度,必要时也可以脱网,实现孤岛自治运行。在此背景下,本文针对典型微电网—光储型微电网,从分布式电源模型、分布式电源并网及微电网应用几个方面进行工程性研究,为微电网示范工程应用提供理论依据,具体的研究工作如下：1)分析了光伏发电系统及储能系统的结构,建立了光伏组件及储能电池的工程化应用模型,并对模型的动态外特性进行仿真,结合实际产品的特性曲线,对模型进行参数辨识并比较,为建立工程化模型做准备。2) 分析了直流变换器和并网逆变器的结构及控制技术,重点对恒功率控制,恒压/恒频控制,下垂控制进行了分析,并建立相应的算法控制策略。对光伏发电组件的PQ控制及储能系统的PQ控制及U/F控制进行了仿真测试。3) 概括了微电网协调控制方法及运行模式,分析了主从控制、对等控制及分层分布式控制的优缺点及不同运行模式下需要解决的问题,基于主从控制方法,本文建立了包含光伏发电及储能系统的工程化微电网模型。4) 基于PSCAD电磁仿真软件,建立光储型微电网模型,研究分布式电源的PQ、U/f控制策略,并设计了并网、离网、并离网切换等应用场景,仿真分析不同场景下的微电网运行控制效果,验证了所设计的策略的有效性及稳定性,为示范工程的建立提供基础。
[Abstract]:With the increasingly serious environmental problems, people have conducted in-depth research on clean energy grid technology. But the distribution network stability and power quality indexes such as the renewable energy access high randomness is bound to reduce, and other adverse effects. In order to fully absorb the renewable energy and power grid stability, are proposed grid technology. Micro grid is an organic whole by renewable energy, distributed generation and grid connected power electronic device and control mechanism, which can be used as a controllable load in grid scheduling, when necessary, can also be off the network, realize the autonomous island operation. Under this background, aiming at the typical micro grid light storage type micro grid, from the distributed power model, distributed power grid and micro grid application on engineering research, provide a theoretical basis for the micro grid demonstration projects, specific research The work is as follows: 1) analysis of the structure of photovoltaic power generation system and energy storage system, established the engineering application model of photovoltaic module and storage battery, and the dynamic characteristics of the model simulation, combined with the characteristic curve of the actual product, the model parameters were identified and compared, to prepare for the establishment of the.2 project model) analysis of the structure and control technology of DC converter and inverter, focus on the control of constant power, constant voltage / frequency control and droop control are analyzed, and establish the corresponding control strategy. The PQ control algorithm and U/F control PQ control and storage of photovoltaic power generation component system to carry out the simulation test.3) summarizes the micro grid coordinated control method and operation mode, analyzes the advantages and disadvantages of master-slave control, and different operation mode of peer control and distributed control of the need to solve the problem, based on the main control methods from, This paper built a photovoltaic power generation and energy storage system engineering micro grid model.4) PSCAD electromagnetic simulation software based on the establishment of light storage type micro grid model of distributed power supply PQ, U/f control strategy, and design the grid, from the network, and from the network handoff scenarios, simulation analysis of different scenarios micro grid operation control effect and verify the validity and stability of the design strategy, provide the basis for the establishment of the demonstration project.

【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM732

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