Title :
A new approach to winding capacitance dividing method for the generator with considerable winding distributed capacitance
Author :
Tian, Qing ; Liu, Zhijun ; Lin, Xiangning
Author_Institution :
State Grid Oper. Co. Ltd., Beijing
Abstract :
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 protection. It is proved that the capacitive current in the case of normal operation, external fault and internal fault can be calculated using the same dividing method. The formula of the partition coefficient is provided and the characteristic of the coefficient is explored by MATLAB software.
Keywords :
electric generators; machine windings; capacitive current; high-voltage graded insulated cable wound generator; powerformer; winding capacitance dividing method; winding distributed capacitance; Cable insulation; Capacitance; Distributed power generation; Power cable insulation; Power cables; Power generation; Power system protection; Power transmission lines; Stator windings; Voltage; Powerformer; cable capacitance; graded insulation;
Conference_Titel :
Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on
Conference_Location :
Nanjuing
Print_ISBN :
978-7-900714-13-8
Electronic_ISBN :
978-7-900714-13-8
DOI :
10.1109/DRPT.2008.4523674
