面向互联电网连锁故障安全防控的关键支路辨识

doi:10.12204/j.issn.1000-7229.2023.01.002

电力建设 ›› 2023, Vol. 44 ›› Issue (1): 12-20.doi: 10.12204/j.issn.1000-7229.2023.01.002

面向互联电网连锁故障安全防控的关键支路辨识

段忠峰¹(), 王亚松²(), 白茂金¹(), 刘威¹(), 朱春萍¹(), 王成福²(), 董晓明²()

1.山东电力工程咨询院有限公司,济南市 250013
2.电网智能化调度与控制教育部重点实验室(山东大学),济南市 250061

收稿日期:2022-08-12 出版日期:2023-01-01 发布日期:2022-12-26
通讯作者: 段忠峰 E-mail:dzf_3027@163.com;1209475471@qq.com;baimaojin@sdepci.com;liuwei3@sdepci.com;zhuchunping@sdepci.com;wangcf@sdu.edu.cn;dongxiaoming@sdu.edu.cn
作者简介:王亚松(1997),男,硕士研究生,主要研究方向为电力系统安全稳定评估与控制,E-mail:1209475471@qq.com。
白茂金(1978),男,硕士,高级工程师,主要研究方向为电力系统规划,E-mail:baimaojin@sdepci.com。
刘威(1981),男,硕士,高级工程师,主要研究方向为电力系统规划,E-mail:liuwei3@sdepci.com。
朱春萍(1985),女,硕士,高级工程师,主要研究方向为电力系统规划,E-mail:zhuchunping@sdepci.com。
王成福(1984),男,博士,副教授,主要研究方向为可再生能源发电并网的调度与控制、综合能源系统运行规划与控制,E-mail:wangcf@sdu.edu.cn。
董晓明(1980),男,博士,副教授,主要研究方向为电力系统运行与分析,E-mail:dongxiaoming@sdu.edu.cn。
基金资助:
国家重点研发计划项目(2018YFE0208400);山东省自然科学基金项目(ZR2020ME195)

Identification of Key Branches for Safety Prevention and Control of Cascading Failures in Interconnected Power Grids

DUAN Zhongfeng¹(), WANG Yasong²(), BAI Maojin¹(), LIU Wei¹(), ZHU Chunping¹(), WANG Chengfu²(), DONG Xiaoming²()

1. Shandong Electric Power Engineering Consulting Institute Co., Ltd., Jinan 250013, China
2. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University), Jinan 250061, China

Received:2022-08-12 Online:2023-01-01 Published:2022-12-26
Contact: DUAN Zhongfeng E-mail:dzf_3027@163.com;1209475471@qq.com;baimaojin@sdepci.com;liuwei3@sdepci.com;zhuchunping@sdepci.com;wangcf@sdu.edu.cn;dongxiaoming@sdu.edu.cn

摘要/Abstract

摘要：

随着电网互联紧密程度的提高,抵御连锁性故障成为关键问题。在一定场景下,电网关键载流支路故障会引发过载型连锁反应,威胁系统安全运行,对于此类关键线路的筛选和辨识具有重要意义。据此,在考虑无功电压的改进直流潮流模型的基础上,推导和构建了过载型连锁故障动态演化模型。该模型考虑连锁故障过程中系统功率平衡和电压稳定装置的调节作用以及系统的校正控制措施,并较为准确地模拟支路失效后互联系统连锁故障的动态演化过程,进而研判连锁故障对系统功能和结构的影响。在此基础上,提出了电网载流支路的重要度评估指标,通过大规模连锁故障模拟计算,获得各载流支路的重要度指标,最终实现电网关键支路的有效辨识。以IEEE 39节点系统为算例,验证了所提模型和方法的有效性。

关键词: 电网互联, 过载型连锁故障, 关键支路, 改进直流潮流, 校正控制

Abstract:

With the improvement of the interconnection of power grid, resisting the cascading faults becomes a key problem. In a certain scenario, the key current-carrying branch accidents of power grid will lead to overload cascading faults, threatening the safe operation of the system, which is of great significance to the screening and identification of such critical lines. On the basis of improving the DC power flow model of reactive voltage, the dynamic evolution model of overload-type cascading faults is deduced and constructed. The model takes into account the adjusting effects of power balance and voltage stability devices and the corrective control measures of the system, and accurately simulates the dynamic evolution of the cascading faults of the interconnected system after branch failures, so as to analyze the influence of cascading faults on the system function and structure. On this basis, the importance evaluation index of current-carrying branches of power grid is proposed, and the importance index of each current-carrying branch is obtained through large-scale cascading fault simulation calculation, and finally the effective identification of key branches of power grid is realized. Taking the IEEE 39-bus system as an example, the effectiveness of the proposed model and method is verified.

This work is supported by National Key R&D Program of China (No. 2018YFE0208400) and Shandong Provincial Natural Science Foundation(No.ZR2020ME195).

Key words: interconnected grid, overload cascading fault, key branch, improve DC power flow, calibration control

中图分类号:

TM715

段忠峰, 王亚松, 白茂金, 刘威, 朱春萍, 王成福, 董晓明. 面向互联电网连锁故障安全防控的关键支路辨识[J]. 电力建设, 2023, 44(1): 12-20.

DUAN Zhongfeng, WANG Yasong, BAI Maojin, LIU Wei, ZHU Chunping, WANG Chengfu, DONG Xiaoming. Identification of Key Branches for Safety Prevention and Control of Cascading Failures in Interconnected Power Grids[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(1): 12-20.

图/表 7

图1 过载型连锁故障动态演化过程流程

Fig.1 Flow chart of dynamic evolution process of overload cascading fault

图2 故障过程中的功率平衡策略

Fig.2 Power balance strategy in fault process

图3 IEEE 39节点系统结构图

Fig.3 IEEE 39-bus system structure diagram

图4 PQ节点电压幅值计算结果

Fig.4 Result of voltage amplitudes at PQ buses

表1 电压幅值计算误差及算法计算时间比较

Table 1 Comparison of voltage amplitude calculation error and algorithm calculation time

表2 载流支路重要度评估结果

Table 2 Evaluation results of the current-carrying branches

图5 支路Fbra和Tbra指标数据图

Fig.5 Index data of Fbra and Tbra

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面向互联电网连锁故障安全防控的关键支路辨识

Identification of Key Branches for Safety Prevention and Control of Cascading Failures in Interconnected Power Grids

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