Influence of series compensated double circuits on the same tower zerosequence component to relay protection

Huadian Technology ›› 2017, Vol. 39 ›› Issue (9): 6-9.

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Influence of series compensated double circuits on the same tower zerosequence component to relay protection

1.Guodian Nanjing Automation Company Limited, Nanjing 210003, China; 2.Nanjing Guodian Nanzi Automation Company Limited, Nanjing 211153, China

Online:2017-09-25 Published:2017-10-10

Abstract

Abstract:

Utilizing installed series capacitor double circuits on the same tower grounding failure zero sequence network, the influence of the zerosequence power direction element and zero sequence differential protection on the two sides protection installation is analyzed in the case of high resistance failure at the outlet of the string and the failure of the MOV. Analysis indicated that series compensation capacitor may lead to far away from the side of series compensation protection of zero sequence power direction relay from action, as a protection of high resistance earth fault zerosequence differential protection sensitivity and the lower even refused to move. The simulation test verifies the correctness of the theoretical analysis and puts forward the principle of the main protection.

Key words:

series capacitor compensation, double circuits on the same tower, zero sequence power direction, zerosequence differential protection, high resistance fault

XUE Mingjun1,2, WANG Yuting1,2, CHEN Fufeng1,2, ZOU Lei1,2, ZHANG Xiang1,2, CHEN Shi1,2.

Influence of series compensated double circuits on the same tower zerosequence component to relay protection

[J]. Huadian Technology, 2017, 39(9): 6-9.

Influence of series compensated double circuits on the same tower zerosequence component to relay protection

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