电力市场中火电机组自组合的模糊优化方法

Fuzzy optimization method based self-commitment of thermal unit in electricity market

机组启停机计划是发电公司参与电力市场竞争的重要决策依据。市场环境下,出清价格具有高度不确定性,必须在机组自组合决策中给予考虑。在市场出清价格模糊描述的基础上,提出不确定环境下含有启停机爬坡速率和升降出力爬坡速率约束的火电机组自组合模糊优化方法,通过分析真实市场参与者的决策取向,提出一种新的精确化方法,并采用动态规划模型求解精确优化问题,同时给出了精确化过程中多目标偏好系数的选择建议。算例分析表明,模糊机组自组合方法能灵活反映决策目标,是市场环境下一种新的不确定性决策方法。

Unit commitment plan is crucial to decision-making for generating companies to participate in electricity market. Under the market environment, market clearing price has high uncertainty, which should be considered in self-unit commitment. Based on the fuzzy description of the market clearing price, fuzzy self-unit commitment optimization method of the coal-fired unit with startup/shutdown ramping rate and ramping up/down rate constraints is presented under the uncertainty environment. A new precision method convening fuzzy optimization problem to a rigorous one is proposed through the analysis of decision-making proneness of the real market participants. The, resulting rigorous optimization problem has been solved via dynamic programming model. Simultaneously, advices for the preference coefficients have been suggested. Finally, an example shows that the proposed fuzzy self-unit commitment method refleets the decision-making objective flexibly and qualified as a new uncertainty decision-making method under the market environment.