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考虑电网载荷均衡度及 N-1 安全约束的防灾经济调度
作者:
作者单位:

1.广东工业大学自动化学院;2.东南大学电气工程学院;3.国网河南焦作供电公司

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基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Economic Dispatch for Disaster Prevention Considering Load Rate Homogeneity of Power Grid and N-1 Security Constraints
Author:
Affiliation:

1.School of Automation,Guangdong University of technology;2.School of Electrical Engineering, Southeast University

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    摘要:

    极端气象灾害的日益频发,给电网安全稳定运行带来了极大的威胁。传统电力系统的经济 调度方法为了追求发电成本的经济性而忽略了电网载荷分布状况,在恶劣天气条件下重载或是满载线路的停运都可能引发电力系统连锁故障大停电事故。为此,提出了一种恶劣天气条件下考虑 电网载荷均衡度及 N - 1 安全约束的防灾经济调度方法。该方法在传统经济调度模型的基础上,综合考虑全网和恶劣天气影响区域输电线路载荷的状况,通过降低全网输电线路载荷率的平均绝 对偏差以及恶劣天气下区域输电线路载荷率,改善电网的载荷均衡度,并提高系统的运行安全。为保证调度模型在恶劣天气条件下的鲁棒性及求解高效性,基于支路开断分布因子以及校验添加再 校验思想,提出了一种新的 N - 1 安全约束动态校核及添加方法。最后,基于现有的考虑隐性故障的连锁故障仿真模型,提出了在台风灾害下电力系统防灾经济调度策略的可靠性评估方法。IEEE RTS-79 系统的仿真结果表明,相比于传统经济调度方法,所提出的防灾经济调度方法能够有效地提高电网载荷均衡度,改善恶劣天气条件下电力统的停电分布,并可提高系统运行安全性及可靠性

    Abstract:

    The increasing occurring frequency of extreme metrological disasters is posing a great threat to the safe and stable operation of power grid. The traditional power system economic dispatch method aims at pursuing the economics of the generation costs, while ignoring the load distribution condition of power grid. The outage of heavy or full loading lines will lead to the cascading failure and blackout of power system. To solve this problem, a blackout-prevention economic dispatch method considering load rate homogeneity of power grid and N-1 security constraints is proposed for severer whether conditions. Based on the traditional economic dispatching model, and considering comprehensively the load rate distribution of the whole power grid and the transmission lines affected by extreme weather, the load rate distribution balance is improved by reducing the average absolute deviation of the load rate of the entire power grid and the load rate of transmission lines in severer weather areas, the operation security of power system is consequently enhanced. To ensure the robustness and high solving efficiency of the model in severer weather, a novel method for dynamically checking and adding N-1 security constraints of transmission lines is proposed based on a check-feed-back-check idea and the outage distribution factor (LODF) of transmission lines. Finally, a reliability evaluation method for power system dispatching strategies in typhoon disaster is proposed based on the existing cascading failure simulation model considering hidden failures. Simulation results of IEEE RTS-79 test system show that compared with the traditional economic dispatch method, the proposed dispatching method can effectively increase the load rate homogeneity of power grid, and improve the blackout distribution of the power system under severer whether condition, thus improving the system operation safety and reliability

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黄丽平,王逸飞,郭俊韬,等.考虑电网载荷均衡度及 N-1 安全约束的防灾经济调度[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190923003.
HUANG Liping,WANG Yifei,GUO Juntao,et al.Economic Dispatch for Disaster Prevention Considering Load Rate Homogeneity of Power Grid and N-1 Security Constraints[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190923003.

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历史
  • 收稿日期:2019-09-23
  • 最后修改日期:2020-04-27
  • 录用日期:2020-03-10
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