摘要
由于可再生能源装机比例增大,传统机组预留大量事故备用,运行经济性显著降低。为此,首先提出了事故备用分散转移(DTCR)的概念:将原本集中在发电侧和电网侧的部分事故备用向用电侧分散转移。然后,提出了DTCR的效益评估方法和参考指标:观测到DTCR的边际效益递减现象可作为选取合理分散备用容量的参考;提出经济负载率阈值,可用于定量评估产生DTCR效益的经济负载率区间。最后,结合14节点至300节点等5个IEEE标准系统,并计及风机和需求响应的影响,分析了DTCR的效益大小、产生机理、影响因素和适用场景。结果表明,DTCR能够在日常调度中持续产生经济效益,优化潮流分布和降低网损。
Due to the increasing proportion of the installed renewable energy capacity,conventional generation units have to keep massive contingency reserves,which leads to poor economy of unit operation.To solve this issue,this paper proposes the concept of decentralized transfer of contingency reserve(DTCR),which refers to transferring part of the centralized contingency reserve from the supply side to the demand side.Then,the benefit assessment method and reference indicators of DTCR are proposed.The observed diminishing marginal benefit(DMB)of DTCR serves as a reference to select a reasonable capacity of decentralized reserve.The economic load rate threshold(ELRT)is proposed to quantitatively assess the economic load rate range of producing DTCR benefits.Finally,the benefit,its mechanism,impact factors and application scenarios of DTCR are analyzed using 5 IEEE standard systems with 14 buses to 300 buses and considering wind power generators and demand response.Results indicate that the proposed DTCR system can continuously generate economic benefits,optimize power flow distribution,and reduce network loss in daily dispatching.This work is supported by National Natural Science Foundation of China(No.51877134).
作者
肖居承
何光宇
张思远
王治华
常乃超
卢强
XIAO Jucheng;HE Guangyu;ZHANG Siyuan;WANG Zhihua;CHANG Naichao;LU Qiang(Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education(Shanghai Jiao Tong University),Shanghai 200240,China;Electric Power Dispatching and Control Center of State Grid Hunan Electric Power Company Limited,Changsha 410004,China;Electric Power Dispatching and Communication Center of State Grid Shanghai Municipal Electric Power Company,Shanghai 200122,China;National Electric Power Dispatching and Control Center of State Grid Corporation of China,Beijing 100031,China;State Key Laboratory of Control and Simulation of Power System and Generation Equipments(Tsinghua University),Beijing 100084,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2020年第13期9-16,共8页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51877134)。
关键词
事故备用分散转移
效益评估
机组经济运行
经济负载率阈值
边际效益
decentralized transfer of contingency reserve
benefit assessment
economic operation of generation unit
economic load rate threshold
marginal benefit
