A comparative study of voltage stability NVSI Index and load margin index

Zhikui Zhang; Yuan Gao; Xin Wang

doi:10.30574/gjeta.2023.17.1.0209

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A comparative study of voltage stability NVSI Index and load margin index

Zhikui Zhang ^*, Yuan Gao and Xin Wang

School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing, Jiangsu, China.

Research Article

Global Journal of Engineering and Technology Advances, 2023, 17(01), 094–103.

Article DOI: 10.30574/gjeta.2023.17.1.0209

DOI url: https://doi.org/10.30574/gjeta.2023.17.1.0209

Publication history

Received on 02 September 2023; revised on 08 October 2023; accepted on 11 October 2023

Abstract

With the development of new energy generation technologies, photovoltaic (PV) power generation has gained widespread application as a clean and sustainable source of electricity. However, the intermittency and variability of PV generation pose new challenges to power system secure and stable operation. The WSCC 9-bus system is used in this paper to investigate the effect of PV integration on static voltage stability in power systems. An improved voltage stability index (NVSI) considering the new energy was used to measure the voltage stability of the access point of PV plant. Compared with the P-V curve and the classic load margin index (ILM), even if the index value is less than 0, the NVSI index has still a better measure effect on voltage stability.

Keywords

Voltage stability; Photovoltaic generation; P-V curve; NVSI index; Load margin index

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How to cite this article

Zhikui Zhang, Yuan Gao and Xin Wang. A comparative study of voltage stability NVSI Index and load margin index. Global Journal of Engineering and Technology Advances, 2023, 17(1), 094-103. Article DOI: https://doi.org/10.30574/gjeta.2023.17.1.0209

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