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DC distribution network switch characteristic test system and method

A switching characteristic and testing system technology, applied in the field of DC distribution network switch characteristic testing system, can solve the problems of the overall action characteristic, action logic and working mode of the DC distribution network switch without a good test method, so as to reduce the amount of calculation, Eliminates quantization errors and has strong versatility

Pending Publication Date: 2021-11-09
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the test of the DC distribution network switch can only rely on the observation of the current change of the electronic current transformer to measure the action time of the switch, but the overall operating characteristics, action logic, and working mode of the DC distribution network switch are not very good. means of testing

Method used

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  • DC distribution network switch characteristic test system and method
  • DC distribution network switch characteristic test system and method
  • DC distribution network switch characteristic test system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0060] An embodiment of the present invention provides a DC distribution network switch characteristic testing system, such as figure 2 shown, including:

[0061] The first in-situ acquisition unit (ie figure 2 The local acquisition unit 1) in the figure 1 The mechanical switch branch in the DC distribution network switch is connected;

[0062] The second on-site acquisition unit (ie figure 2 The local acquisition unit 2) in the figure 1 The transfer branch in the DC distribution network switch is connected;

[0063] The third on-site acquisition unit (ie figure 2 The local acquisition unit 3) in the figure 1 The energy-consuming branches in the DC distribution network switch are connected;

[0064] The test host is connected to the first on-site acquisition unit, the second on-site acquisition unit and the third on-site acquisition unit respectively, and is also used to communicate with figure 1 The electronic current transformer in the DC distribution network swi...

Embodiment 2

[0098] An embodiment of the present invention provides a method for testing the characteristics of a DC distribution network switch, including:

[0099] Use the test host to send a trip command to the DC switch control and protection module in the DC distribution network switch based on the preset distribution network control and protection trip protocol, and record the trip time t of the trip command 0 ;

[0100] Using the first on-site acquisition unit, the second on-site acquisition unit, and the third on-site acquisition unit to collect the current of the corresponding branch in the DC distribution network switch, and send it to the test host;

[0101] Use the test host to calculate the step time of each branch based on the received current of each branch;

[0102] Using the test host to calculate the step moment of the electronic current transformer based on the received current data sent by the electronic current transformer in the DC distribution network switch;

[01...

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Abstract

The invention discloses a DC distribution network switch characteristic test system and method, wherein the system comprises a first in-situ collection unit which is connected with a mechanical switch branch in a DC distribution network switch; a second in-situ acquisition unit which is used for being connected with a transfer branch in the direct-current distribution network switch; a third on-site acquisition unit which is used for being connected with an energy consumption branch in the direct-current distribution network switch; and a test host which is respectively connected with the first in-situ acquisition unit, the second in-situ acquisition unit and the third in-situ acquisition unit, and is also used for being connected with an electronic current transformer and a direct-current switch control and protection module in the direct-current distribution network switch. According to the invention, a non-contact sensor, such as a TMR sensor or an open Hall, is additionally arranged in the DC distribution network switch; then, a test system of the direct current distribution network switch is built and the on-off time sequence of a plurality of branches in the direct current distribution network switch is tested by taking the current step time as the action completion time of the switch; and a flexible and comprehensive test means is provided for the DC distribution network switch.

Description

technical field [0001] The invention belongs to the technical field of DC distribution network testing, and in particular relates to a DC distribution network switch characteristic testing system and method. Background technique [0002] With the continuous development of power electronics technology, the DC distribution network is the main form of the future AC-DC hybrid grid. The DC distribution network is relative to the AC distribution network. It provides the load with the DC bus. The DC load can be directly powered by the DC bus, and the AC load needs to be powered by the inverter equipment. If the DC load in the load is proportional Larger, the DC power distribution will have a greater advantage. [0003] The DC distribution network switch is the main technical bottleneck in the development of the DC distribution network. At present, the DC distribution network switch generally adopts a hybrid DC circuit breaker, such as figure 1 As shown, including the primary circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 王晨清高磊罗飞李鹏孔祥平杨毅张弛郑俊超林金娇
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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