混合系统中、长期节能调度发电计划的蒙特卡罗模拟

Monte carlo simulation of medium and long-term generation plan in hybrid power system based on environmental/economic dispatch

发电计划是电力市场运转的中心环节,是电网调度的前提条件和重要手段,具有十分重要的经济效益和社会效益。重点论述了节能调度下兼顾环境保护和经济效益的多目标混合电力系统发电计划模型。鉴于节能、环保的要求,提出在节能调度下风、水、火电混合系统的中长期发电计划模型。该模型同时考虑系统能耗、氮氧化物排放量和电网购电费用三个目标。首先利用蒙特卡罗随机方法,处理风能、水能的随机特性。然后对各个单目标确定性模型求解得到目标函数值,其次对目标值进行一定程度的伸缩,并且定义目标隶属函数将确定性问题模糊化。接着采用最大满意度法将多目标问题转化为单目标非线性规划问题求解,得到火电机组的月度发电计划。仿真结果表明该策略对节能问题和经济问题的解决具有重要现实意义。

Generation Scheduling is the center of power market operation, and is the important precondition and measure of the gird dispatch in power system, which may bring out great benefit both in economy and in society. This paper has studied a novel bi-objective fuzzy optimal generation plan model, in which both environmental and pool purchase cost are considered. To focus on the requirement of environment protection, this paper also presents a dispatch model in integrated power system of wind-hydro-thermal. Energy consumption, gas displacement and purchase cost are considered in this model. First of all, the randomicity of wind power and hydropower is deal with by Monte carlo stochastic simulation. Then each single-objective deterministic model is solved so that its objective value is got along with the results of power dispatch. Secondly, every objective function is fuzzed through defining objective membership function, then, bi-objective programming problem is reformulated into nonlinear single objective programming problem by means of fuzzy satisfaction-maximizing. The numerical results demonstrate this model can better deal with environmental and economic problems.