摘要
提出了一种改进的OPA模型,该模型由内外2层循环组成,其中内循环综合考虑电网潮流、调度、自动化和继电保护等因素的影响,能够描述系统的快动态;外循环则计及电网升级、运行方式、规划等因素的作用,能够刻画电网长期慢动态行为。进一步提出利用风险价值(VaR)和条件风险价值(CVaR)估计电力系统大停电风险,可以准确描述不同运行参数下电网安全运行水平,并给出总体预防灾变措施。对东北电网的仿真分析结果证明了改进OPA模型的正确性。
An improved OPA model is proposed. This model contains two layers of iteration. The inner iteration which describes the fast dynamic of the system considers the influence of the power flow, the dispatching, the automation, and the relay protection, etc, while the outer one which describes the long term slow dynamics of the system considers the impact from power grid upgrade, network operation, planning and other factors. Furthermore, based on the VaR and CVaR, a method which could be used to evaluate the blackout risk of the power system quantitatively is presented. Appropriate preventive control measures are proposed as well. The effectiveness of the improved OPA model is verified by the simulation results concerning the northeast power grid of China.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第13期1-5,57,共6页
Automation of Electric Power Systems
基金
国家重点基础研究发展计划(973计划)资助项目(200493217902)
国家自然科学基金资助项目(50525721,50595411)~~
关键词
OPA模型
风险价值
条件风险价值
OPA model
value at risk （VaR）
conditional value at risk （CVaR）
