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

fYear

2008

fDate

6-9 April 2008

Firstpage

1672

Lastpage

1677

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/DRPT.2008.4523674

Filename

4523674