关于风电不确定性对电力系统影响的评述

A Review on Impacts of Wind Power Uncertainties on Power Systems

风电的波动和间歇行为都具有强烈的不确定性,其对电力可靠性、电能质量、经济性及社会福利的影响随着渗透率的增加而越发突出。为此,讨论风电波动性、间歇性与随机性的关系;归纳风电不确定性因素的构成、描述,及其对电力系统功角稳定性、频率与电压可接受性、充裕性、电能质量、电力市场及减排等方面的影响;并将其纳入广义阻塞的框架。回顾对其机理的研究现状;讨论发电侧、电网、需求侧及其综合的不确定性分析及协调控制;提出计及风电不确定性的电网三道防线;强调量化和风险观点在上述研究中的重要性。

With the everAncreasing penetration level of wind power, its impacts on power system reliability, power quality, economical efficiency and social welfare are becoming more and more significant mainly due to the uncertainty nature of the fluctuation and intermittence of wind. Thus, the relationships between fluctuation, intermittence and randomness are discussed. The causes and mathematical description of uncertain factors of wind power and the impacts on the acceptability of power frequency/voltage, stability and adequacy of power systems, power quality, electricity power market and emission reduction are concluded. Studying the problem in the generalized congegtion framework of power systems is suggested. Also, the state-of-art and development of wind power uncertainties are reviewed. The solutions to cope with wind power uncertainties, as well as their optimization and coordination, are discussed through aspects of generation side, grid side and demand side. And also, the impacts caused by wind power uncertainties are considered in the three-defense-lines of power systems. The importance of quantitative analysis and risk-based decision-making are emphasized and suggested for further researches.