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Automatic feeder testing method based on secondary signals

A feeder automation and secondary signal technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of exposure and timely resolution, affecting the confidence and waste of distribution automation systems, and avoiding safety measures and primary equipment. damage effect

Inactive Publication Date: 2019-05-17
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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Problems solved by technology

In the last round of power distribution automation pilot upsurge from the end of the 20th century to the beginning of the 21st century, due to the lack of testing methods, the FA function was not strictly tested, and the fault handling process could only be checked by waiting for the fault to occur after long-term operation, resulting in problems that could not be fully exposed and resolved in the early stage. Timely solution has seriously affected the actual operation level and the confidence of operators in the distribution automation system, making many distribution automation systems gradually abandoned or left idle as decorations, resulting in huge waste

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  • Automatic feeder testing method based on secondary signals
  • Automatic feeder testing method based on secondary signals
  • Automatic feeder testing method based on secondary signals

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Embodiment Construction

[0024] The FA test model based on secondary signals mainly includes centralized, local and distributed FA tests. The main equipment includes power sources, switches, lines, terminals, master stations and communication networks.

[0025] Such as figure 1 Shown is a typical 10kV rural power distribution network topology, the line uses the local type FA. S is the power supply, Bus is the substation busbar, F1 is the primary switch, F2 and F3 are section switches, Z1-Z4 are boundary switches, and FL is the contact switch.

[0026] Such as figure 2 As shown, if a fault occurs at point F, according to the local FA logic, F1 and related switches will be switched on and off sequentially to isolate the faulty area and restore the power supply to the non-faulty area.

[0027] In practical applications, if it is necessary to verify the FA logic, the difficulty is that the fault current on the 10kV line reaches thousands of amperes, which is not only difficult to simulate the fault, bu...

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Abstract

The invention relates to an automatic feeder testing method based on secondary signals. The automatic feeder testing method is characterized in that the same power distribution network secondary signal model is built according to a to-be-tested power distribution network topology graph, wherein the power distribution network secondary signal model comprises (1) an analog power supply, (2) an analog switch, (3) an analog load, (4) an analog wire, and (5) a power distribution terminal. The invention provides the automatic feeder testing method based on the secondary signals, verification can beconducted before the FA function of a power distribution automation system is put into use, and whether FA action logic of related equipment such as a main station and a terminal conforms to theoretical design or not is checked. The model based on the power distribution network secondary signals does not need a 10 kV high voltage and high-current signal, and safety measures and the concern of damage to primary equipment are avoided.

Description

technical field [0001] The invention relates to a feeder automatic testing method based on a secondary signal. Background technique [0002] Distribution automation (DA) is an important means to improve the reliability of power supply. FA is one of the advanced applications of distribution automation, which can automatically identify faulty areas, isolate faulty areas and restore power supply to non-faulty areas. In the last round of power distribution automation pilot upsurge from the end of the 20th century to the beginning of the 21st century, due to the lack of testing methods, the FA function was not strictly tested, and the fault handling process could only be checked by waiting for the fault to occur after long-term operation, resulting in problems that could not be fully exposed and resolved in the early stage. Timely solution has seriously affected the actual operation level and the confidence of operators in the distribution automation system, making many distribut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 祁升龙黄鸣宇芦翔刘海涛尹亮栗磊梁亚波
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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