基于混合储能的微电网多电源协调控制研究

发布时间：2018-01-05 12:30

本文关键词：基于混合储能的微电网多电源协调控制研究　出处：《燕山大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着微电网容量的不断增大，越来越多的分布式电源被加入到微电网中。在含有多种分布式电源的微电网中，针对不同微电源的不同特性进行研究，利用其优势之处，弥补其他微电源的不足，以实现整个微电网的持久、稳定、高效运行。为了提高微电网的稳定运行，改善微电网的能量利用效率，本文在基于含有混合储能等多种电源的微电网系统中对他们之间的协调控制进行了研究。本文首先介绍了光伏发电系统、铅酸蓄电池、超级电容的基本原理和数学模型，建立了光伏并网逆变器的理想数学模型、铅酸蓄电池三阶动态数学模型、超级电容RC模型，对光伏电池并网、蓄电池和超级电容的充放电特性进行了仿真分析。接着对混合储能系统的结构及其协调控制策略进行了介绍，研究了双向DC/DC变换器结构及其原理、滞环电流计算原理、电流控制器。在此基础上对混合储能系统的充放电过程进行了优化，，与只有蓄电池储能的充放电过程进行了仿真对比和分析。进而对微电网的协调控制策略作了详细介绍，设计了双向DC/AC变换器，介绍了电压主从下垂控制策略和恒定功率控制策略，分别确定了储能系统、光伏发电系统、柴油发电系统等的能量调用和功率输出原则，介绍了负载检测和并网控制策略，结合各个电源的能量管理原则提出了适合本文微电网的多电源功率协调策略。最后，通过在MATLAB/Simulink中搭建的含多电源的微电网仿真模型，对孤岛运行情况下储能系统正常和储能系统过放电时的微电网协调控制策略进行了仿真分析。此外，对并网运行情况下微电网向大电网反馈功率和储能系统过充电时并网运行进行了仿真分析。
[Abstract]:With the increase of the capacity of the micro - grid , more and more distributed power supplies are added to the micro - grid . In the micro - grid with multiple distributed power sources , the disadvantages of other micro - power sources are researched by using the advantages of the micro - grid system . In order to improve the stable operation of the micro - grid and improve the energy utilization efficiency of the micro - grid , the coordination control among them is studied in the micro - grid system based on the hybrid energy storage . In this paper , the basic principle and mathematical model of photovoltaic power generation system , lead - acid storage battery and super capacitor are introduced . The ideal mathematical model of photovoltaic grid - connected inverter , the third - order dynamic mathematical model of lead - acid storage battery and the super capacitor RC model are established , and the charge - discharge characteristics of photovoltaic cell grid , storage battery and super capacitor are simulated and analyzed . The structure of hybrid energy storage system and its coordination control strategy are introduced . The structure and principle of bi - directional DC / DC converter and its principle , hysteresis current calculation principle and current controller are studied . In this paper , the coordinated control strategy of micro - grid is introduced in detail . Two - way DC / AC converter is designed , the energy calling and power output principle of voltage master - slave droop control strategy and constant power control strategy are introduced , the energy calling and power output principle of energy storage system , photovoltaic power generation system , diesel power generation system and so on are introduced , the load detection and grid control strategy are introduced , and the multi - power supply power coordination strategy suitable for the micro - grid is put forward based on the principle of energy management of each power supply . Finally , through the simulation model of micro - grid with multiple power supply built in MATLAB / Simulink , the micro - grid coordinated control strategy of the energy storage system and the energy storage system under the condition of isolated island is simulated and analyzed . In addition , the feedback power and the energy storage system of the micro - grid to the large power grid are simulated and analyzed under the condition of grid operation .

【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM727

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