A Study on Intelligent Electric Power Network and Creation Principle of Order in Power Flow Profile

近年来，世界范围内对发电和输电的监管改革促进了独立电力生产商（ipp）参与电力市场。如果在市场上进行大量的电力交易，那么部分输电网出现潮流堵塞或线路过载的风险就会很高。本课题研究了一种克服此类潮流问题的新策略。该策略基于移相变压器、串联电容器或储能装置对潮流的智能控制。项目取得的主要成果如下：为了通过分布在输电网中的移相变压器的自治分散动作来控制潮流，需要在移相变压器的每个局部控制器中嵌入控制目标的自创建和动作之间的协调等智能控制能力。提出了一种基于特征分析的新方法，可以用最少的移相变压器个数找到可控制的潮流曲线。剖面取决于移相变压器的配置。提出了一种利用非线性优化技术确定输电网线路阻抗或储能装置充放电动作，从而将潮流曲线修正为指定曲线的基本方法。

Recently, worldwide regulatory reform for electric power generation and transmission promotes the participation of IPPs (Independent Power Producers) into electric power markets. If a great deal of electricity is traded on the markets, then the risk of power flow congestion or line overloading in part of transmission network becomes high.In this research project, a new strategy which overcomes such power flow problems was studied. The strategy is based on intelligent control of power flow by phase shifting transformers, series capacitors or electric energy storage devices. The major results of the projects are as follows.1.In order to control power flow by autonomous decentralized actions of phase shifting transformers distributed over transmission networks, intelligent control abilities such as self-creation of control target and coordination among the actions should be embedded in each local controller for phase shifting transformer.2.A novel technique based on eigenanalysis was devised which can find out power flow profiles controllable with minimum number of phase shifting transformers. The profiles depend on the allocations of phase shifting transformers.3.A fundamental method using non-linear optimization techniques was developed which determines line impedance of transmission networks or charge/discharge action of electric energy storage devices so as to modify power flow profiles to specified ones.