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事故备用分散转移的效益评估
作者:
作者单位:

1.电力传输与功率变换教育部重点实验室(上海交通大学),上海市 200240;2.国网湖南省电力有限公司电力调度控制中心,湖南省长沙市 410004;3.国网上海市电力公司电力调度控制中心,上海市 200122;4.国家电网有限公司国家电力调度控制中心,北京市 100031;5.电力系统及发电设备控制和仿真国家重点实验室(清华大学),北京市 100084

作者简介:

通讯作者:

基金项目:

国家自然科学基金资助项目(51877134)。


Benefit Assessment of Decentralized Transfer of Contingency Reserve
Author:
Affiliation:

1.Key Laboratory of Control of Power Transmission and Conversion (Shanghai Jiao Tong University), Ministry of Education, Shanghai 200240, China;2.Electric Power Dispatching and Control Center of State Grid Hunan Electric Power Company Limited, Changsha 410004, China;3.Electric Power Dispatching and Communication Center of State Grid Shanghai Municipal Electric Power Company, Shanghai 200122, China;4.National Electric Power Dispatching and Control Center of State Grid Corporation of China, Beijing 100031, China;5.State Key Laboratory of Control and Simulation of Power System and Generation Equipments (Tsinghua University), Beijing 100084, China

Fund Project:

This work is supported by National Natural Science Foundation of China (No. 51877134).

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    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、降低网损,单位时刻效益率可达0.34%~12%,典型日总效益可达发电成本的2.5%。

    Abstract:

    Due to the increasing proportion of the installed renewable energy capacity, conventional units have to undertake massive contingency reserves, which leads to poor economics of unit operation. To resolve this issue, this paper proposes the concept of decentralized transfer of contingency reserve (DTCR), which refers to the transfer of part of the centralized contingency reserve from the supply side to the demand side. Then, the benefit assessment method of DTCR as well as reference indicators are developed. 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 size, benefit mechanism, impacting factors and applicable scenarios of DTCR are analyzed using 5 IEEE standard systems of 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. The benefit rate at a single hour can reach 0.34%~12%, and the total benefit in a typical day can reach 2.5% of the total generation cost.

    表 1 IEEE算例的DTCR效益初步测算(ractive=10%)Table 1 Preliminary calculation of DTCR benefits for IEEE systems (ractive=10%)
    图 不同机组负载率和分散备用率下的DTCR效益率Fig. DTCR benefit rate with respect to various unit load rates and decentralized reserve rates in case 57
    表 2 计及DR和风机影响的典型日DTCR效益对比(ractive=10%)Table 2 Comparison of DTCR benefits of the typical day considering impact of DR and wind power generators (ractive=10%)
    图 机组有功出力-成本曲线Fig. Function curves of power and cost of units
    图 DTCR前后机组出力及网损对比Fig. Comparison of unit output and power loss before and after DTCR
    图 DTCR前后case300线路潮流变化率Fig. Change rate of power flow of case 300 before and after DTCR
    图 DTCR前后case57线路潮流变化率Fig. Change rate of power flow of case 57 before and after DTCR
    图 典型日总负荷及风机出力上限变化曲线Fig. Curves of typical daily total load and output limit of wind power generators
    图 分散备用率的实时变化曲线Fig. Real-time curve of decentralized reserve rate
    图 考虑DR和风机影响下的DTCR经济效益Fig. Economic benefits of DTCR considering the impacting of DR and wind power generators
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引用本文

肖居承,何光宇,张思远,等.事故备用分散转移的效益评估[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20191027004.
XIAO Jucheng,HE Guangyu,ZHANG Siyuan,et al.Benefit Assessment of Decentralized Transfer of Contingency Reserve[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20191027004.

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  • 收稿日期:2019-10-27
  • 最后修改日期:2020-04-12
  • 录用日期:2020-03-09
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