The invention provides a ground grid fault diagnosis method based on a self-adaptive particle swarm optimization algorithm. A fault diagnosis equation is established according to a node voltage analytical method in an electric network theory, then a target optimization function is obtained according to a minimum energy principle, the problem of ground grid fault diagnosis is converted into the problem of target optimization with constraint conditions, then the self-adaptive particle swarm optimization algorithm is adopted to solve the optimization problem, and a diagnosis result is obtained. In the ground grid fault diagnosis method based on the self-adaptive particle swarm optimization algorithm in the invention, through establishing a mathematical model for ground grid fault diagnosis, and using the optimization target function, the ill-condition degree of the diagnosis equation is lowered, and the global optimization capability of the self-adaptive particle swarm optimization algorithm is called, thereby improving the efficiency and the accuracy of solving the optimization model, and enabling the diagnosis result to be accurate and reliable.

Ground grid fault diagnosis method based on self-adaptive particle swarm algorithm

A grounding grid breakpoint diagnostic method for a transient electromagnetic method, based on a transient electromagnetic detection apparatus. The method comprises: (101) disposing a test line at a position above a grounding grid to be diagnosed on the ground, and determining coordinates of a detection point; (102) obtaining information about coordinates of the detection point, and coinciding the center of the transient electromagnetic detection apparatus with the coordinates of the detection point; (103) performing, by the transient electromagnetic detection apparatus, measurement along the test line point by point, so as to obtain measurement data; (104) processing, by using diagram forming software, the measurement data to form a longitudinal resistivity cross-section diagram of the detection point according to a preset formula; (105) determining whether a breakpoint occurs at the detection point according to the longitudinal resistivity cross-section diagram. The method does not depend on a design material of a grounding grid, and can implement non-excavation grounding grid breakpoint diagnosis without outage, thereby reducing economic losses in a diagnosis process.

Grounding grid breakpoint diagnostic method for transient electromagnetic method

The invention discloses a grounding grid corrosion diagnostic method and device. The method comprises the steps of injecting sinusoidal alternating currents the frequency of which is not 50 Hz into a grounding grid, measuring the potential rise and reference supply bus voltage of an observation point, calculating the percentage of the reference supply bus voltage of the observation point, simulating an intact grounding grid with simulation software and calculating the percentage of the reference supply bus voltage of the observation point, obtaining the difference value between the percentage of the reference supply bus voltage of the actual observation point and the percentage of the reference supply bus voltage calculated by the simulation software, and judging whether the percentage difference value of the reference supply bus voltage of the observation point meets a preset condition. According to the grounding grid corrosion diagnostic method and device, large-area excavation of the grounding grid is not needed, huge waste of labor, material resources and financial resources is avoided, limitation of operating conditions on site is eliminated, normal operation of an electric system is guaranteed, the application prospect is wide, and market value is high.

Grounding grid corrosion diagnostic method and device

The invention discloses a device for detecting a corrosion state of a grounding grid. The device comprises a microcontroller module, a data acquisition device, an excitation current source and a data communication device, wherein the excitation current source injects current into accessible nodes of the grounding grid; the data acquisition device acquires the potential of the accessible nodes; and the microcontroller module controls the excitation current source module and the data acquisition device and processes the acquired data, and the treated data is uploaded to an upper computer by virtue of the data communication device. According to the device disclosed by the invention, the grounding grid does not need to be excavated in large area, waste of lots of manual labor, material resources and financial resources is avoided, the device is not limited by field operating conditions, normal operation of an electric power system is guaranteed, and the device has wide application prospects and great market values.

Device and method for detecting corrosion state of grounding grid

The invention relates to a transformer station grounding network fault diagnosis method based on synthesis of surface potential and magnetic induction strength, which comprises the steps of: a first step, calculating the theoretical surface potential and the magnetic induction strength of a transformer station grounding network; a second step, respectively measuring the surface potential and an induction voltage along a path above a grounding conductor, and furthermore calculating the magnetic induction strength according to the induction voltage; a third step, according to the surface potential of a measuring point and a measured value of the magnetic induction strength, respectively calculating the surface potential and the magnetic induction strength of each conductor according to a robustness least square method for acquiring the surface potential and the magnetic induction strength of the grounding network conductor; and a fourth step, comparing the surface potential and the magnetic induction strength of an actual grounding network with the surface potential and the magnetic induction strength which are theoretically calculated in a normal working state, and calculating a comprehensive grey absolute correlation degree ADI. Compared with the prior art, the transformer station grounding network fault diagnosis method has advantages of improving operation reliability of the transformer station grounding network, etc.

Transformer station grounding network fault diagnosis method based on synthesis of surface potential and magnetic induction strength

Intelligent diagnosis method for corrosion failure point of transformer substation grounding grid

The utility model provides a corrosion fault point diagnosis system for substation grounding grids. The system comprises an alternating-current signal collection sensor used for acquiring a node current and a voltage signal of the substation grounding grid, an alternating-current/direct-current signal collector used for receiving the node current and the voltage signal and carrying out data processing and display, a data processing terminal used for receiving data and carrying out fault point analysis and processing, and a communication terminal used for sending the processed data to external information management equipment. With the system, it can be known to what extent every conductor of the grounding grid is corroded and whether every conductor of the grounding grid is broken or not without cutting power or excavating the grounding grid so that safe and reliable operation of a power system can be ensured. The corrosion fault point diagnosis system for substation grounding grids has the advantages of being simple, accurate and unrestrained by field operation conditions.

Corrosion fault point diagnosis system for substation grounding grids

Insulating sleeve cleaner

The utility model discloses an insulating sleeve cleaning device which comprises a connecting rod with length adjustable. One end of the connecting rod is connected with a motor brush head, the other end of the connecting rod is connected with a controller of the motor brush head, and the controller is electrically connected with the motor brush head. The middle of the connecting rod is arranged on a support, and the connecting rod is connected with the support through a universal ball joint. The support bears the main weight of the cleaning device, an operator can easily control motion of a motor by holding the controller by hand, the connecting rod can be rotated under the effect of the universal ball joint to clean any angular positions of an insulating sleeve, the motor brush head is flexible and convenient to use, and insulating sleeves in transformer substations can be conveniently cleaned.

Insulating sleeve cleaning device

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Intelligent diagnosis method for corrosion failure point of transformer substation grounding grid

Corrosion fault point diagnosis system for substation grounding grids

Insulating sleeve cleaner

Insulating sleeve cleaning device