高比例风电接入的电力系统灵活性评估与优化

doi:10.3969/j.issn.1000-7229.2019.09.001

摘要/Abstract

摘要： 针对含高比例风电接入的电力系统灵活性评估问题，建立了动、静态指标相结合的灵活性综合评估体系。其中，基于发电资源技术特性的灵活性静态指标用于评价系统中各类发电资源所固有的灵活性供给能力；基于电力系统运行特性的灵活性动态指标侧重针对风电和负荷的波动性和随机性，定量评估系统在不同运行状态下的灵活性不足程度。在此基础上，提出了灵活容量缺额最小化的机组组合优化模型，在兼顾系统运行成本最优的基础上，构建了电力系统应对高比例风电接入的灵活容量缺额动态优化模型，可为系统灵活性的改造与规划提供参考。基于某省级实际系统数据的算例验证了所提指标与方法的有效性。

Abstract: For the flexibility assessment of power systems with high proportion of wind power, a comprehensive assessment system of flexibility combining dynamic and static indicators is proposed in this paper. Among them, the static flexibility indicator based on the technical characteristics of generation resources is used to evaluate the inherent flexibility supply capacity of various generation resources in the system. The dynamic flexibility indicator based on the operation characteristics of the power system focuses on the uncertainty and variability of wind power and load, and quantitatively assesses the lack of flexibility of the power system under different operating conditions. On this basis, a unit optimization model for minimizing flexible capacity shortage is proposed. Taking into account the optimal operation cost of the system, a dynamic optimization model for the flexible capacity shortage of power system to cope with high proportion of wind power access is constructed, which can provide reference for the transformation and planning of system flexibility. With the case study of a certain power grid, the effectiveness and rationality of the proposed composite assessment system and method of the flexibility assessment are verified.

Key words: power system flexibility, high proportion of wind power, flexible capacity shortage, composite assessment indicator

刘英琪，谢敏，韦薇，张悦，刘明波. 高比例风电接入的电力系统灵活性评估与优化[J]. 电力建设, 2019, 40(9): 1-10.

LIU Yingqi, XIE Min, WEI Wei, ZHANG Yue, LIU Mingbo. Assessment and Optimization for Power System Flexibility with High Proportion of Wind Power[J]. Electric Power Construction, 2019, 40(9): 1-10.

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