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This paper presents a method which can equivalently arrange the capacitance distribution along with the winding of the generator on the terminal and neutral respectively in a reasonable partition, particularly for a type of high-voltage graded insulated cable wound generator, Powerformer. This method can be used to compensate the capacitive current wholly to improve the reliability of the differential...
This paper presents a self-adaptive compensated differential protection of ac synchronous generators, particularly a type of high-voltage graded insulated cable wound generator, powerformer. The phase voltages at the terminals are utilized to estimate the capacitive currents when the generator is synchronized and no fault is detected. With the calculated capacitive current the capacitance distribution...
In this paper, a new principle of stator single-phase ground fault protection for powerformers is proposed, based on the energy function of the fault component. Different from the traditional protection schemes, which need measurements of the zero-sequence fundamental frequency voltage and the zero-sequence third-harmonic voltage at both the neutral and the terminals, the proposed approach detects...
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