满足充裕性指标的电力系统可接纳风电容量评估

Assessment of Wind Power Capacity in Power Systems to Meet the Adequacy Indexes

立足于风电功率的统计特性,提出一种计及充裕性指标的系统接纳风电能力的评估方法。该方法基于历史的运行数据进行统计,通过模拟计算不同风电容量、储能容量下系统的调峰不足概率、调峰不足期望、发电不足概率以及发电不足期望4种充裕性指标,评估满足给定充裕性水平下的系统可接纳风电的容量。此外,提出一种含风、储系统的综合净负荷以及调峰需求的实用计算方法,基于双线性插值理论,建立了充裕性水平、可接纳风电容量、储能容量的函数关系,为风电容量、储能容量的规划设计提供了参考依据。最后,以实际电网接纳风电能力评估为例,对比了不含储能、含不同储能容量等多种情景下的风电接纳能力,对所提方法进行了分析和说明。

Aiming at the statistical characteristics of wind power, this paper proposes a method to access the wind power accommodation by considering adequacy indexes. On the basis of the statics of historical operating data, four adequacy indexes, namely Peak-Load Regulation Not Enough Probability （PRNEP）, Peak-Load Regulation Not Enough Expectation （PRNEE）, Loss of Load Probability （LOLP） and Loss of Energy Expectation （LOEE）, are simulated, according to the computing results of adequacy indexes, the wind power accommodation is chosen to meet the preset adequacy level. Besides, a practical method for calculating requirement of comprehensive net load and peak-.load regulation for wind- energy storage system （ESS） is presented. Based on the bilinear interpolation theory, the relationship function of adequacy level, wind power accommodation and ESS capacity is obtained, which offers valuable reference for wind power and ESS capacity planning and scheduling. Finally, taking a practical system for example, the wind power accommodations without ESS and with different capacity of ESS are compared and analyzed, and the proposed method is illustrated.