电力市场环境下的输电系统规划方法初探

输电系统在电力市场运营中扮演着十分重要的角色,因为它提供了实现公平竞争的场所.输电系统的运行状况如容量充裕性对电力市场的竞争性有重要的影响.适当地扩展或加强输电系统对满足发电公司和用户的需要,消除或缓解输电系统阻塞以促进电力市场竞争进而提高整个电力系统的运行效率具有重要作用.与传统的垂直一体化的垄断电力工业中的输电系统规划相比,电力市场环境下的输电系统规划更加复杂,需要处理的不确定性因素更多.特别地,输电系统规划期内新建的发电厂的位置及装机容量在市场环境下成了不确定性因素.在此背景下,针对水平年输电系统规划问题,作者构造了解决电力市场环境下输电系统规划问题的通用方法框架,提出了一种基于蒙特卡罗仿真和遗传算法的输电系统灵活规划方法.最后,用算例系统对所提出的方法作了说明.

A PRELIMINARY RESEARCH ON TRANSMISSION SYSTEM PLANNING METHODOLOGY IN ELECTRICITY MARKET ENVIRONMENT

Transmission system plays an important role in electricity market operations as it provides a level playing field for all market participants. The operation status of the transmission system such as capacity adequacy has an important influence on the electricity market competition. It is important to reasonably expand or reinforce the transmission system to meet the need of generation companies and consumers, eliminate or relieve transmission congestions to promote competition in the electricity market and then to improve the operation efficiency of the whole power system. Compared with the transmission system planning in the traditional vertically integrated monopoly industry, the transmission system planning in the electricity market environment is more complicated and there are more uncertain factors to be dealt with. Especially, the locations and capacities of new power plants to be built in the planning period become uncertain factors. Considering this background, a versatile methodological framework for horizontal year transmission system planning under market environment is established and a flexible transmission system planning method based on the Monte-Carlo simulation and genetic algorithm is presented. Finally, the essential features of the proposed method are illustrated by numerical examples.