Neutral point indirectly grounded ground fault detection system
A ground fault and detection system technology, applied in fault location, fault detection by conductor type, short circuit test, etc., can solve the problem that the steady-state characteristics of the line are not obvious, the ground current is small, and the field line selection problem has not been completely solved, etc. question
Pending Publication Date: 2021-01-22
JIANGSU ELECTRIC POWER CO +1
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Problems solved by technology
For the neutral point indirect grounding system, after a grounding fault occurs, because the grounding current is small, the steady-state characteristic change of each line is not obvious, and the problem of field line selection has not been completely solved.
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[0016] The specific embodiments of a ground fault detection system with an indirectly grounded neutral point of the present invention will be described in detail below with reference to the accompanying drawings.
[0017] like figure 1 As shown in the figure, the ground fault detection system of the present invention includes a signal acquisition unit, a signal conditioning unit, a control processing unit, a display unit and a communication unit, and the signal acquisition unit is sequentially connected with the signal conditioning unit and the control processing unit. The control processing unit is also connected with the display unit and the communication unit respectively; the ground fault detection system controls whether the bus tie switch is disconnected according to the information collected by the signal collection unit, and then determines the specific The grounding line is connected, and fault display is performed through the display unit, and uploaded to the remote ...
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The invention provides a neutral point indirectly grounded ground fault detection system. The ground fault detection system comprises a signal acquisition unit, a signal conditioning unit, a control processing unit, a display unit and a communication unit; the ground fault detection system controls whether a bus tie switch is switched off or not according to the information acquired by the signalacquisition unit, judges a specific grounding line according to the subsequently acquired information, displays faults through the display unit and uploads the faults to a remote monitoring center through the communication unit. The invention provides the neutral point indirectly grounded ground fault detection system, which can timely and accurately determine a fault line and a fault type and ensure the working reliability of a power distribution network.
Description
technical field [0001] The invention belongs to the technical field of electric power detection, and in particular relates to a ground fault detection system with a neutral point indirectly grounded. Background technique [0002] With more and more power users, the power distribution network has become more and more complex, and there are more and more lines. Although the single-phase grounding of the line can continue to supply power for a short time, if the fault cannot be eliminated in time, it will continue for a long time. Running with faults for a long time is very easy to aggravate and expand the faults, causing more serious short-circuit faults, thereby causing system tripping, and in some cases, it may cause overvoltage of the entire power grid, affecting the normal operation of the power system. Therefore, when a single-phase ground fault occurs, it is of great significance to find the fault line as soon as possible to ensure the safe and reliable operation of the ...
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IPC IPC(8): G01R31/52G01R31/08
CPCG01R31/52G01R31/086
Inventor 张超陈平黄海泉顾文栋何东伟
Owner JIANGSU ELECTRIC POWER CO