Setting coordination of field loss protection with admittance and excitation device low excitation limit

Abstract

Abstract:

To prevent the generator field loss protection from being misoperated, it must coordinated with excitation device low excitation limit.Based on the calculation formula of power, it deduced the process of transformation from P-Q plane into admittance plane, and introduced the principle of field loss protection with admittance and the principle of low excitation limit of ABB U6800 excitation device. Taking the No.3 generator of Shanghai Shenergy Lingang CCGT Power Generation Company Limited as an example, the calculation of generator field loss protection was set up. The actual capability of leading phase of the No.3 generator was tested, and the exact parameters of the low excitation limit of the excitation device were obtained. At the end, the setting coordination of generator field loss protection and excitation device low excitation limit was checked, so as to ensure low excitation limit to precede field loss protection, and prevent the field loss protection from being misoperated.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">generator, leading phase, excitation, font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">P-Qfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt"> plane, admittance plane, field loss protection, low excitation limit

ZHANG Bo.

Setting coordination of field loss protection with admittance and excitation device low excitation limit [J]. Huadian Technology, 2019, 41(9): 63-66.

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Setting coordination of field loss protection with admittance and excitation device low excitation limit

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