Research and application of multiple STATCOMs to improve the stability of AC/DC power systems in China Southern Grid

Hong Rao; Shukai Xu; Yong Zhao; Chao Hong; Wei Wei; Xiaolin Li; Jianshe Zhang; Qiang Song

Research and application of multiple STATCOMs to improve the stability of AC/DC power systems in China Southern Grid

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Author(s): Hong Rao ¹ ; Shukai Xu ¹ ; Yong Zhao ¹ ; Chao Hong ¹ ; Wei Wei ¹ ; Xiaolin Li ¹ ; Jianshe Zhang ¹ ; Qiang Song ²
- Affiliations: 1: Electric Power Research Institute of Southern Grid of China, Guang zhou 510080, People's Republic of China ;
  2: Department of Electrical Engineering, Tsinghua University, Beijing 100084, People's Republic of China
Source: Volume 10, Issue 13, 06 October 2016, p. 3111 – 3118
DOI: 10.1049/iet-gtd.2015.0675 , Print ISSN 1751-8687, Online ISSN 1751-8695

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Received 01/06/2015, Accepted 02/03/2016, Revised 27/02/2016, Published 06/10/2016

This study presents the research and application of multiple static synchronous compensators (STATCOMs) in the China Southern Grid (CSG) to enhance the stability of its receiving-end power system. In this research, a practical methodology is developed for the optimal allocation of STATCOMs in a complex power system through both static and dynamic approaches. The allocation scheme for installing multiple STATCOMs in the CSG is determined using the proposed process. ±200 MVAr STATCOMs are developed based on cascaded H-bridge converters connected in the delta structure. A special system-level control strategy for fast voltage recovery applications is introduced in this study, and field test results and application effects are presented. Results of the real-time digital simulation are introduced to verify the application effects in the case where multiple STATCOMs are connected to the grid. Field test results and analysis of the recorded data for the system faults during actual operation also verify the application effects of multiple STATCOMs in the CSG.

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Research and application of multiple STATCOMs to improve the stability of AC/DC power systems in China Southern Grid

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