GIS double-bus distribution equipment fault detection method and system
A technology for power distribution equipment and fault detection, applied in the field of electric power, can solve problems such as inability to detect, and achieve the effect of improving safety
Active Publication Date: 2015-08-19
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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Problems solved by technology
[0005] Based on this, it is necessary to provide a technical solution for the current distribution of the parallel knife switch to judge the fault of the power distribution equipment when the current of the corresponding circuit can only be checked in the prior art, and the GIS double bus switching operation cannot be detected. A GIS double-bus power distribution equipment fault detection method and system
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[0023] The specific implementation of the GIS double-bus power distribution equipment fault detection method and system provided by the present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] refer to figure 1 , figure 1 Shown is a flow chart of a GIS double-bus power distribution equipment fault detection method of an embodiment, including the following steps:
[0025] S10, detecting the state of the circuit breaker of the bus coupler and each outgoing line and the bus coupler knife switch; wherein, the states of the circuit breaker and the knife switch include a closed state and an open state;
[0026] refer to figure 2 , figure 2 Shown is a schematic diagram of the structure of the GIS double-bus power distribution equipment in this embodiment. As shown in the figure, the GIS double-bus power distribution equipment includes two buses: the first bus and the second bus, and four outgoing lines: the first outgoing line a...
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The invention relates to a GIS double-bus distribution equipment fault detection method and system. The GIS double-bus distribution equipment fault detection method comprises the following steps: detecting the state of a busbar and the state of a breaker and a busbar disconnecting link of each outlet wire, wherein the state of the breaker and the disconnecting link comprises a closed state and a broken state; according to the breaker, the disconnecting link and the state, constructing a physical model of GIS double-bus distribution equipment; respectively obtaining each outlet wire current, and substituting each outlet wire current into the physical model to determine current prediction values of busbar current and two disconnecting link braches of outlet wires side by side; respectively measuring current measuring values of the busbar current and the two disconnecting link braches of the outlet wires side by side; calculating differences between the current prediction values of the busbar current and the two disconnecting link braches of the outlet wires side by side and the corresponding current measuring values, and determining the differences by use of a preset criterion; and according to a determination result, determining a fault state of the GIS double-bus distribution equipment.
Description
technical field [0001] The invention relates to the field of electric power technology, in particular to a GIS double-bus distribution equipment fault detection method and system. Background technique [0002] Fully enclosed combined electrical appliances GIS are widely used in substations. Since the metal of the GIS equipment is fully enclosed, it is difficult to use direct visual observation and infrared temperature measurement during operation to judge the insertion depth of the connector conductor, the opening and closing of the circuit breaker and the knife switch, and the contact status of each contact surface. During operation, the insertion depth of the joint conductor is insufficient and the contact is poor; the position indication of the circuit breaker and the isolating switch is in place, but the actual moving contact is not in place, and the moving and static contacts are in poor contact or even open circuit. The existence of these defects seriously threatens th...
Claims
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IPC IPC(8): G01R31/00
Inventor 张健能谭梓荣谭家勇陈溢华何宇琪周志红劳锦富
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID