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Research of over-voltage of coal mine power system
- Source :
- Gong-kuang zidonghua, Vol 39, Iss 2, Pp 107-111 (2013)
- Publication Year :
- 2013
- Publisher :
- Editorial Department of Industry and Mine Automation, 2013.
-
Abstract
- In view of problem that 35 kV power system of a Coal Mine often happens over-voltage at thunderstorm day, the paper analyzed causes of over-voltage, indicated that over-voltage was induced by fraction frequency resonance and the fraction frequency resonance was induced by PT and capacitance to earth of overhead line. Through analyzing parameters of resonance over-voltage of the power system, it gave corresponding reform scheme, namely replacing PT with better excitation voltammetry characteristic, adding nonlinear harmonic eliminator at neural point of high-voltage side of PT and installing intelligent resonance eliminating device with multifunction. The actual application showed that 35 kV power system has not happened resonance over-voltage with reliable running after using the reform scheme.
Details
- Language :
- Chinese
- ISSN :
- 1671251X
- Volume :
- 39
- Issue :
- 2
- Database :
- Directory of Open Access Journals
- Journal :
- Gong-kuang zidonghua
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.f8ef58cf50614a31b17a870e1c5a3394
- Document Type :
- article