Optimal dispatch after security correction control based on steady-state security region of AC/DC hybrid system

被引：0
|
作者：
Chen Z. [1 ,2 ]
Zhu Z. [3 ]
Yan J. [1 ,2 ]
Lu C. [1 ,2 ]
机构：
[1] School of Electrical Engineering, Southeast University, Nanjing
[2] Jiangsu Key Laboratory of Smart Grid Technology and Equipment, Nanjing
[3] State Grid Jiangsu Electric Power Engineering Consulting Co., Ltd., Nanjing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 04期
关键词：
AC/DC hybrid system; N-1 fault of heavy load line; Optimal dispatch; Security distance sensitivity; Steady-state security region;
D O I：
10.16081/j.epae202103007
中图分类号：
学科分类号：
摘要：
The security correction control of large-scale AC/DC hybrid system often results in system located in a critical security state. Therefore, it is urgent to study the optimal dispatch strategy of AC/DC hybrid system after security correction control. Based on the steady-state security region theory, a mathematical model of steady-state security region considering N-1 fault constrain is built, and its depicting method of optimal dispatch security sub-region is given. The economics and security of the optimal dispatch model are comprehensively evaluated with the system generation cost, voltage deviation and security margin. By calculating the security distance sensitivity, the sensitive generators and DC lines that have a significant effect on the crucial section are determined, and the security sub-region projections of different dimensions are depicted under the constraints of different security margin, providing richer and more accurate operation information and strategic guidance for optimal dispatch. The analysis of cases shows that the optimal dispatch security sub-region can improve the economics and effectiveness of the system, avoiding the impact of N-1 fault of heavy load line on the secure operation of the system. © 2021, Electric Power Automation Equipment Press. All right reserved.
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页码：139 / 147and169
相关论文
共 20 条
  • [1] LIU Zhenya, ZHANG Qiping, Study on the development mode of national power grid of China, Proceedings of the CSEE, 33, 7, pp. 1-10, (2013)
  • [2] SHU Yinbiao, ZHANG Wenliang, ZHOU Xiaoxin, Et al., Security evaluation of UHV synchronized power grid, Proceedings of the CSEE, 27, 34, pp. 1-6, (2007)
  • [3] TU Jingzhe, ZHANG Jian, WU Ping, Et al., Mechanism analysis on instability caused by sending-side contingencies of multiple HVDC sending systems, Automation of Electric Power Systems, 39, 20, pp. 146-151, (2015)
  • [4] XU Tao, WU Xuelian, LI Zhaowei, Et al., Coordinated control strategy of multi-DC emergency power support to improve frequency stability of power systems, Automation of Electric Power Systems, 42, 22, pp. 69-77, (2018)
  • [5] CHEN Zhong, ZHU Zhengguang, YAN Jun, Security correction strategy of AC/DC hybrid system based on security distance sensitivity, Electric Power Automation Equipment, 39, 9, pp. 144-150, (2019)
  • [6] YUAN Sen, CHEN Dezhi, LUO Yazhou, Et al., Stability characteristics and coordinated control measures of multi-resource for DC blocking fault impacting weak AC channel, Electric Power Automation Equipment, 38, 8, pp. 203-210, (2018)
  • [7] WANG Ying, LIU Bing, LIU Tianbin, Et al., Coordinated optimal dispatching of emergency power support among provinces after UHVDC transmission system block fault, Proceedings of the CSEE, 35, 11, pp. 2695-2702, (2015)
  • [8] QIU Wei, ZHANG Jianhua, LIU Nian, Et al., Multi-objective optimal generation dispatch with consideration of operation risk, Proceedings of the CSEE, 32, 22, pp. 64-72, (2012)
  • [9] CHEN S J, KANG C Q, XIA Q, Et al., Steady-state security assessment method based on distance to security region boun-daries, IET Generation, Transmission & Distribution, 7, 3, pp. 288-297, (2013)
  • [10] YU Yixin, Review of study on methodology of security regions of power system, Journal of Tianjin University, 41, 6, pp. 635-646, (2008)
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