摘要
中国风资源与负荷中心逆向分布的特点客观上形成了含集群风电的多电源联运源端系统,其中最典型的是风火联运源端系统,提高其发电的控制灵活性对于促进风电消纳十分重要。针对"三北"地区风火联运源端系统特点,提出在调度中心和源端发电单元之间建立有功优化运行层,对局部分散的风电场和火电机组进行协调控制,从而提高源端电力的控制灵活性,充分利用消纳空间以提高风电利用率;其中,异特性多类型机组联运的控制复杂性问题、强刚性风火联运源端系统应对可再生能源发电波动性难题是实现源端系统有功优化运行的关键难题。文中从区域风电场群协调模式、多空间尺度分层协调模式以及多时间尺度逐级精细化策略3个方面提出了相应的解决思路;在此基础上,提出多时空尺度分层协调有功优化运行体系,并梳理相应的运行性能评价指标;最后,着重从体系中风火协调层、集群风电协调层两个角度阐述关键技术问题。
The reverse distribution of wind resource and electrical load center forms the regional transmission systems with multiple types of power sources and high penetration of wind power in the Northwest,North and Northeast China.Of those systems,the wind and thermal power bundled transmission system is the most typical one. Improving its generation controllability is the key issue to increase the proportion of wind power accommodation.First,based on an understanding of characteristics of the wind and thermal power bundled transmission system,an idea of building a new optimal operation layer between the generation units and dispatch center is proposed,which is responsible for the coordinated control between local scattered wind farms and thermal units to make the total generation more controllable and increase the wind power utilization rate.The control complexity of the combined multiple types of units with different characteristics,and dealing with the variability from renewable energy in such strong rigid generation systems are the main challenges to this optimal operation layer.The entire operation control schemes are described from three aspects,i.e.the wind farm clusters coordinated control mode,the hierarchical control mode over multiple spatial scales and the detailed coordinated control over multiple temporal scales.Finally,the hierarchical coordinated optimal operation system and corresponding operation performance evaluation indices are proposed.Moreover,the key technical problems of the optimal operation system are discussed from two aspects:the coordinated layer between wind and thermal power and that inside wind power clusters.
出处
《电力系统自动化》
EI
CSCD
北大核心
2014年第20期1-8,共8页
Automation of Electric Power Systems
基金
国家高技术研究发展计划(863计划)资助项目(2012AA050203)
国家自然科学基金重大项目(51190101)~~
关键词
风火联运
源端系统
集群风电
分层协调
多时空尺度
wind and thermal power bundled
power transmission system
wind farm clusters
hierarchical coordination
multiple spatial and temp oralscales
