Generator local discharge on-line monitoring device and monitoring method thereof
A partial discharge and monitoring device technology, applied in the field of generator partial discharge on-line monitoring device, can solve problems such as single anti-interference means, low measurement bandwidth, and reduced sensitivity and reliability of measurement results, so as to achieve good anti-dry effect and improve reliability High safety and high effect
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Embodiment 1
[0042] An online monitoring method for partial discharge of generators, including the following steps:
[0043] In the first step, a ceramic capacitance sensor 1 and a ceramic capacitance sensor 2 are installed on the generator bus. The ceramic capacitance sensor 1 is installed at the outlet end of the generator bus. The ceramic capacitance sensor 2 is installed in the same direction 15m away from the ceramic capacitance sensor 1. Place, while satisfying the formula
[0044] L 2 V a = L 1 V a + L V
[0045] Among them, the distance between the signal acquisition device and the ceramic capacitance sensor 1 is L 1 Is 35m, the distance between the signal acquisition device and the ceramic capacitance sensor 2 is L 2 Is 50m, the distance between ceramic capacitance sensor 1 and ceramic capacitance sensor 2 is 15m, V a Is the transmission speed of the signal in the cable, V is the transmission speed of the signal in the bus, and V is known a =0.8...
Embodiment 2
[0050] An online monitoring method for partial discharge of generators, including the following steps:
[0051] In the first step, a ceramic capacitance sensor 1 and a ceramic capacitance sensor 2 are installed on the generator bus. The ceramic capacitance sensor 1 is installed at the outlet end of the generator bus. The ceramic capacitance sensor 2 is installed in the same direction 8m away from the ceramic capacitance sensor 1. Place, while satisfying the formula
[0052] L 2 V a = L 1 V a + L V
[0053] Among them, the distance between the signal acquisition device and the ceramic capacitance sensor 1 is L 1 Is 25m, the distance between the signal acquisition device and the ceramic capacitance sensor 2 is L 2 Is 33m, the distance between ceramic capacitance sensor 1 and ceramic capacitance sensor 2 is 8m, V a Is the transmission speed of the signal in the cable, V is the transmission speed of the signal in the bus, and V is known a =0.8V,...
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