计及风电功率预测误差与需求响应的电力系统滚动调度

Rolling Dispatch of Power System Considering Wind Power Prediction Error and Demand Response

风电的不确定性对电力系统的调度运行带来诸多影响,为减轻该影响,考虑到风电功率预测误差与需求响应均具有时间尺度特性,本文提出一种日前-日内滚动调度策略。风电的不确定性采用基于场景分析法的随机规划理论处理,并将不同类型需求响应按照时间尺度特性进行区分,在日前调度计划阶段引入1类激励型需求响应和基于日前小时电价的价格型需求响应,在日内滚动调度计划阶段,将风电功率更新为最新的风电短期预测数据并利用2类激励型需求响应对其波动性进行补偿。最后通过算例对比分析了不同调度模式下的运行成本以及弃风率,验证了所提调度策略的有效性,结果显示滚动调度可以降低系统运行成本并促进风电的消纳。

The uncertainty of wind power has a lot of influences on the power system operation.This paper presents a rolling dispatch strategy from the day-ahead plan to the intraday plan in order to mitigate the influences,considering that both the prediction error of wind power and demand responses have the time-scale characteristics.The uncertainty of wind power is managed by the stochastic programming theory based on the scenario analysis.The demand responses are differentiated according to the time scale characteristics.The type 1 incentive based demand response and the demand response based on day-ahead hourly varying price are introduced in the day-ahead dispatch.In the intraday rolling dispatch,the type 2 incentive based demand response is used to compensate the volatility of the updated short term wind power prediction.Finally,the operating cost and wind power curtailment rate of the different dispatch schemes are compared with the case study,and the effectiveness of the proposed dispatch strategy is verified.The result shows that rolling dispatch can reduce the operating cost of the system and promote wind power integration.