微网模拟实验系统的设计
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摘要
随着能源、环境等问题的日益凸显,人们越来越重视分布式发电技术。然而具有功率不可控性的分布式电源的接入,对电网产生了诸多不利影响,制约了分布式发电技术的发展。为解决分布式电源接入带来的负面影响,微网作为一种新型的分布式能量管理系统被提出。目前,微网的运行管理控制以及继电保护方案是前沿的研究领域。为了研究微网保护与控制理论的可行性与实用性,建立一套微网模拟实验系统具有重要的意义。
本文设计了一套微网模拟实验系统,并以此为基础对微网的继电保护方案和能量管理策略进行了设计。主要内容有：
首先,对微网模拟实验系统进行了设计。微网模拟实验系统包含：同步发电系统、双馈风力发电系统、直驱风力发电系统、光伏发电系统、储能系统、可调负载、监控系统和模拟输电线路等8个子系统。
其次,根据微网模拟实验系统各个子系统的特性,结合分布式电源的接入对继电保护的影响,设计了一种微网继电保护方案,该继电保护方案采用带方向闭锁的过电流I段保护、过电压保护和广域后备保护。
最后,结合负荷预测、分布式电源功率预测、储能电池容量在线监测,采用了最小二乘法、非线性规划等方法,对该微网模拟实验系统的能量管理方案进行了设计。
As the energy utilization and environmental pollution problems become increasingly prominent, people paying attention to the DG technology. However a large number of accessing to the tradition power grid by DG which power is uncontrollable may brought a host of negative effects and the development of DG is also restricted. Microgrid is the most effective way to make use of DG technology. As a frontier area of research, Microgrid is the hottest issue which focused on energy management and relay protection. In order to study the microgrid protection and the control theory feasibility and the usability, it is necessary to build microgrid simulation system to do some research on the hot topics.
This thesis based on microgrid simulation system, and carried out research on its relay protection & energy management. The main contents include:
Firstly, I have designed first and second electric circuits of microgrid simulation system.Microgrid simulation system including 8 systems:synchronous generator units, doubly-fed induction generator units, direct-driven wind turbine generators units, photovoltaic power system units, storage units, the tunable load, the supervisory system, and analog transmission lines.
Secondly, I have discussed the difference between microgrid with normal grid, the affection which brought by distributed power generation to normal grid. The relay protection scheme including take direction atresia over-current section I protection, the over-voltage protection. Meanwhile, the wide-area backup protection was designed.
Finally, a new energy management algorithm which based on microgrid simulation system designed. According to super short-term load forecasting methods, DG's power prediction formula, battery state-of-charge & the least square method, nonlinear programming to designed a energy management of microgrid simulation system.
本文设计了一套微网模拟实验系统,并以此为基础对微网的继电保护方案和能量管理策略进行了设计。主要内容有：
首先,对微网模拟实验系统进行了设计。微网模拟实验系统包含：同步发电系统、双馈风力发电系统、直驱风力发电系统、光伏发电系统、储能系统、可调负载、监控系统和模拟输电线路等8个子系统。
其次,根据微网模拟实验系统各个子系统的特性,结合分布式电源的接入对继电保护的影响,设计了一种微网继电保护方案,该继电保护方案采用带方向闭锁的过电流I段保护、过电压保护和广域后备保护。
最后,结合负荷预测、分布式电源功率预测、储能电池容量在线监测,采用了最小二乘法、非线性规划等方法,对该微网模拟实验系统的能量管理方案进行了设计。
As the energy utilization and environmental pollution problems become increasingly prominent, people paying attention to the DG technology. However a large number of accessing to the tradition power grid by DG which power is uncontrollable may brought a host of negative effects and the development of DG is also restricted. Microgrid is the most effective way to make use of DG technology. As a frontier area of research, Microgrid is the hottest issue which focused on energy management and relay protection. In order to study the microgrid protection and the control theory feasibility and the usability, it is necessary to build microgrid simulation system to do some research on the hot topics.
This thesis based on microgrid simulation system, and carried out research on its relay protection & energy management. The main contents include:
Firstly, I have designed first and second electric circuits of microgrid simulation system.Microgrid simulation system including 8 systems:synchronous generator units, doubly-fed induction generator units, direct-driven wind turbine generators units, photovoltaic power system units, storage units, the tunable load, the supervisory system, and analog transmission lines.
Secondly, I have discussed the difference between microgrid with normal grid, the affection which brought by distributed power generation to normal grid. The relay protection scheme including take direction atresia over-current section I protection, the over-voltage protection. Meanwhile, the wide-area backup protection was designed.
Finally, a new energy management algorithm which based on microgrid simulation system designed. According to super short-term load forecasting methods, DG's power prediction formula, battery state-of-charge & the least square method, nonlinear programming to designed a energy management of microgrid simulation system.
引文
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