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考虑水电库容弹性的电力系统经济调度
作者:
作者单位:

1.输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市 400044;2.广西大学电气工程学院,广西壮族自治区南宁市530004;3.国网重庆市电力公司,重庆市 400015

摘要:

随着负荷的增长与新能源的接入,电网运行的安全域不断减小。为此可充分挖掘电网的运行弹性空间,扩大电网运行安全域,实现资源的优化配置。文中提出水电库容弹性空间概念,并建立了考虑来水不确定性和风险成本的库容运行弹性模型;基于此提出了考虑库容弹性空间的经济调度模型,以用于评估考虑库容弹性后的电网运行效益。此外,基于KKT(Karush-Kuhn-Tucker)条件,推导了库容弹性与电网运行状态量之间的灵敏度关系,并提出了关键库容弹性的灵敏度辨识方法,进而在电力系统运行时优先利用关键库容弹性。最后,通过IEEE 30节点系统和某地区的实际电网验证了所提方法的有效性。仿真结果表明,所提方法能够在考虑水库防洪风险控制需求的基础上,有效利用水电库容弹性空间来灵活地调整库存水量,促进水电、风电消纳,降低电网运行成本。

关键词:

基金项目:

国家自然科学基金资助项目(51807014);重庆市自然科学基金博士后科学基金资助项目(cstc2019jcyj-bshX0081)。

通信作者:

作者简介:

温世杨(1995—),男,硕士研究生,主要研究方向:电力系统优化、电力规划、机组组合优化算法。
余娟(1980—),女,通信作者,博士,教授,主要研究方向:电力与能源经济优化运行、风险评估、深度学习。E-mail:yujuancqu@cqu.edu.cn
代伟(1990—),男,博士,助理教授,主要研究方向:综合能源系统优化运行、静态等值理论。E-mail:weidai2019@163.com


Economic Dispatch of Power System Considering Capacity Flexibility of Hydropower Reservoir
Author:
Affiliation:

1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University), Chongqing 400044, China;2.School of Electrical Engineering, Guangxi University, Nanning 530004, China;3.State Grid Chongqing Electric Power Company, Chongqing 400015, China

Abstract:

With the increase of load and the integration of renewable energy, the operation security region of power grid is decreasing. Therefore, the operation flexibility space of power grid should be fully exploited to expand the operation security region of power grid, so as to achieve the optimal allocation of resources. In this paper, a concept of capacity flexibility space of hydropower reservoir is proposed, and the operation flexibility model for capacity of reservoir considering the uncertainty of water inflow and risk cost is established. On this basis, an economic dispatch model is proposed to evaluate the operation benefit of power grid considering the capacity flexibility of reservoir. In addition, based on Karush-Kuhn-Tucker (KKT) conditions, the sensitivity relationship between capacity flexibility of reservoir and operation state variables of power grid is deduced, and a sensitivity identification method for critical capacity flexibility space of reservoir is proposed to utilize the critical capacity flexibility space of reservoir preferentially in power grid operation. Finally, the effectiveness of the proposed method is verified on IEEE 30-bus system and an actual regional power grid. The simulation results dedicate that, on the basis of considering the demand of flood risk control of a reservoir,the proposed method can effectively utilize the capacity flexibility space of reservoir to adjust the reservoir water storage flexibly, promote the hydropower and wind power consumption, as well as reduce the operation cost of power grid.

Keywords:

Foundation:
This work is supported by National Natural Science Foundation of China (No. 51807014) and Postdoctoral Science Foundation of Chongqing Natural Science Foundation of China (No. cstc2019jcyj-bshX0081).
引用本文
[1]温世杨,余娟,代伟,等.考虑水电库容弹性的电力系统经济调度[J].电力系统自动化,2020,44(19):73-82. DOI:10.7500/AEPS20200329003.
WEN Shiyang, YU Juan, DAI Wei, et al. Economic Dispatch of Power System Considering Capacity Flexibility of Hydropower Reservoir[J]. Automation of Electric Power Systems, 2020, 44(19):73-82. DOI:10.7500/AEPS20200329003.
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  • 收稿日期:2020-03-29
  • 最后修改日期:2020-06-29
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  • 在线发布日期: 2020-10-15
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