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Elimination method of dead zone defect between primary equipment and secondary equipment in smart substation

A technology of smart substation and primary equipment, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of incomplete inspection of the dead zone of primary equipment and secondary equipment, failure of intelligent substation operation, misoperation, etc., to avoid Potential safety hazards and defects, improving the effect of strong intelligence and ensuring safe operation

Active Publication Date: 2019-04-23
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +2
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since various professional tests are carried out independently, there is no complete inspection of the dead zone between the primary equipment and the secondary equipment, and defects or malfunctions occur when the new smart substation is live and put into operation, resulting in the failure of the smart substation to be put into operation. Therefore, it is of great significance to carry out research on the overall matching degree between primary equipment and secondary equipment in smart substations.

Method used

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  • Elimination method of dead zone defect between primary equipment and secondary equipment in smart substation

Examples

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Effect test

Embodiment 1

[0022] figure 1 It is a schematic flowchart of a method for eliminating dead zone defects between primary equipment and secondary equipment in a smart substation in this embodiment. The method for eliminating dead zone defects between primary equipment and secondary equipment in a smart substation includes:

[0023] Step S11, applying a three-phase electrical signal with a preset phase and a preset amplitude to the primary equipment of the smart substation so that the smart substation is in a live running state. Before implementing this elimination method, the smart substation has completed various professional tests such as high voltage, metering, and chemical rings, and the secondary commissioning has been completed, and the smart substation is in a state of preparation before being put into operation.

[0024] The dead zone defects between primary equipment and secondary equipment in smart substation include current defects and voltage defects. When eliminating current def...

Embodiment 2

[0030] continue to refer figure 1 , the difference between this embodiment and embodiment 1 is that it also includes:

[0031]Step S17, reading the actual sampling data of the IED sampling device. Specifically, the IED sampling device includes a protection device, a measurement and control device, a network analysis tester, a fault recording device, a watt-hour meter, and an electric energy collection device. The smart substation is divided into primary equipment and secondary equipment. Through the voltage transformer and current transformer installed on the primary equipment, the high voltage and high current on the primary equipment can be converted by a certain transformation ratio to obtain the secondary sampling value for the secondary Device sampling monitoring to protect primary device status. When eliminating current defects, read the actual current sampling data on protection devices, measurement and control devices, network analysis testers, fault recording device...

Embodiment 3

[0035] Compared with Embodiment 2, this embodiment also includes: judging whether the polarity of the current transformer and the current phase relationship are correct according to the three-phase current waveform on the network analysis tester and the fault recorder, and according to the network analysis tester and the fault The three-phase voltage waveform on the wave recording device judges whether the voltage phase relationship is correct. If the phase relationship between the three-phase electrical signal waveforms on the network analysis tester and the fault recorder is consistent with the applied three-phase electrical signal of preset phase and preset amplitude, it means that the current phase relationship / voltage phase relationship is correct And the polarity of the current transformer is correct, otherwise it is necessary to rule out and eliminate the loop defect.

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Abstract

The invention discloses an elimination method of a dead zone defect between primary equipment and secondary equipment in an intelligent substation. The method comprises the steps that a three-phase electrical signal of a preset phase and a preset amplitude is applied to intelligent substation primary equipment, so that the intelligent substation is in a live running state; the actual sampling data of a secondary circuit are measured; theoretical sampling data are acquired according to the preset amplitude and transformer ratio; whether the actual sampling data of the secondary circuit are consistent with the theoretical sampling data is judged; and if the actual sampling data of the secondary circuit are consistent with the theoretical sampling data, the transformer ratio is correct, and otherwise a loop defect is checked and eliminated. According to the invention, whether the actual sampling data of the secondary circuit and the calculated theoretical sampling data is judged by measuring the actual sampling data of the secondary circuit; whether the transformer ratio is correct is judged; and the problem of failed operation, which is caused by incorrect transformer ratio of a new intelligent substation, is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of intelligent substation debugging, in particular to a method for eliminating dead zone defects between primary equipment and secondary equipment in an intelligent substation. Background technique [0002] With the implementation of the country's vigorous development of clean energy strategies, the construction of smart grids as a clean energy transmission channel has kicked off, and the construction of smart substations, which are the hubs of smart grids, is particularly important. Smart substation adopts advanced, reliable, integrated and environment-friendly intelligent equipment, with the basic requirements of digitalization of station information, networking of communication platform, and standardization of information sharing, and automatically completes basic functions such as information collection, measurement, control, protection, measurement and detection. At the same time, it is a substation wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 王大兴林波何彬王东石涛刘学文李廷宾钟威李汶蒿杨康黄迎
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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