A Study on Operation Optimization of Chain SVG in Stabilized Voltage of Rural Power Grid 220kV Transformer Substation

Abstract:

In a rural power grid 220kV transformer substation in Liaoning Province, because of the appearance of a lot of new impact loads in the power supply area, the original reactive power repertory can not meet the existing load need. As a result, the output 66kV voltage fluctuation affects the power supply security of the users. After a comprehensive evaluation, it is planned to set up a set of ±100M SVG to increase the reactive power repertory to stabilize the system voltage. The electrical system of 220kV transformer substation is huge and often meets with sudden failure; and the capacity of this set of SVG is large, so it may worsen the situation in case of improper control. This paper discusses several operational modes that SVG should have and designs a scheme that can be flexibly switched in several operational modes, which is specifically executed by an overall coordination module. This method has passed the preliminary field operation verification.

• Periodical: Applied Mechanics and Materials (Volumes 713-715)
• Pages: 1306-1308
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.713-715.1306
• Online since: January 2015
• Authors: Kun Ya Guo*, Peng Jin, Shu Han Wang, Jian Sun
• Keywords: 220kV Transformer Substation, Short-Circuit Fault, SVG Operational Mode

References

[1] Li Chun, Jiang Qirong, Wang Zhonghong, STATCOM Voltage Control System Performance Analysis [J],; Proceedings of the CSEE; 2000, (08).

[2] Luo Chenglian Principle and Realization of Static Reactive Synchronous Compensator (STATCOM), [M]. Beijing: China Electric Power Press, (2005).

[3] Yang Yihan. Fundamental of Electrical Power System [M]. Beijing: China Water & Power Press, (1986).

[4] Cheng Haozhong, Wu Hao. Electric Power System and Voltage Stability [M]. Beijing: China Electric Power Press, (2004).

[5] Shu Zeliang, Guo Yuhua, Tang Jian. Implementation of Three-Phase Phase-Locked Loop Based on FPGA [J]. Power and electronic technology, 2005, 39(6): 126-128.