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DC interference test control system

A DC interference and test line technology, which is applied in the field of DC interference testing, can solve problems such as major power grid accidents, substation or power plant shutdown accidents, and no simulation environment has been established, so as to ensure safe operation, huge economic and social benefits, and improve Effect of Immunity to DC Interference

Inactive Publication Date: 2011-10-05
NORTH CHINA GRID +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the interference on the DC secondary circuit is light, it will cause incorrect action due to the relay protection device getting wrong information; if the interference on the DC secondary circuit is heavy, it will cause multiple switches to trip without fault at the same time, resulting in substation failure. Or the power plant is completely shut down, which will cause a major accident in the power grid
[0003] In the existing technology, the research on the anti-interference of relay protection DC system is basically theoretical analysis and derivation, and no special experimental research has been carried out in the laboratory, and no simulation environment for the experiment has been established.

Method used

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Examples

Experimental program
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Embodiment 1

[0024] like figure 1 Shown is the DC interference test control system of the embodiment. The system includes: a DC interference simulation device 100 and a host control device 200 ; the DC interference simulation device 100 includes: a control board 101 and an implementation circuit 102 . The host control device 200 is connected to the DC interference simulation device 100 through an Ethernet port. The battery pack 301 provides power for the DC interference simulation device 100 , and the charging device 302 charges the battery pack 301 . The device under test is connected to the test interface of the DC interference simulation device 100 .

[0025] like figure 2 As shown, the implementation circuit 102 further includes: a DC positive interface, used to connect the positive pole of the external DC power supply; a DC negative pole interface, used to connect the negative pole of the external DC power supply; a positive pole interface of the device under test, used to connect ...

Embodiment 2

[0051] like Figure 8 As shown, the DC interference test system of this embodiment includes: a plurality of DC interference simulation devices (100a, 100b and 100c) and a host computer 200 as a host control device; the DC interference simulation devices (100a, 100b and 100c) are controlled through a network The box 500 is connected to the host computer 200 . Each DC interference simulation device includes: a control board and a realization circuit. The battery pack 301 provides power for the DC interference simulation devices ( 100 a , 100 b and 100 c ), and the charging device 302 charges the battery pack 301 . The devices under test (400a, 400b and 400c) are connected to the test interfaces of the corresponding DC interference simulation devices (100a, 100b and 100c).

[0052] The circuit connection relationship of the DC interference test system with three DC interference simulation devices is as follows: Figure 9 shown. Wherein, the implementation circuit of each DC i...

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PUM

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Abstract

The embodiment of the invention provides a DC interference test control system. The system comprises a DC interference simulation device and an upper control device, wherein the DC interference simulation device comprises a control panel and a realization circuit, and the control panel comprises an upper machine communication unit and a component driving unit; and the upper control device comprises a lower machine communication unit, a quick contact adjusting unit, a simulation resistance adjusting unit, an equivalent capacity adjusting unit and a grounding resistance adjusting unit. The upper control device sends a generated control instruction to the control panel of the DC interference simulation device, and the control panel controls components in the realization circuit of the DC interference simulation device according to the control instruction. The DC interference test control system is used for carrying out relay protection DC interference test detection, and the DC groundingresistance and the AC entering resistance of tested secondary equipment are increased.

Description

technical field [0001] The invention relates to the DC interference testing technology of the electric power system, in particular to the relay protection DC interference test detection technology, specifically a DC interference testing control system. Background technique [0002] The accidents caused by the relay protection profession in recent years show that the most likely cause of major accidents in the power grid is the problem of the secondary circuit of the relay protection, especially the problem of the DC system of the relay protection. If the interference on the DC secondary circuit is light, it will cause incorrect action due to the relay protection device getting wrong information; if the interference on the DC secondary circuit is heavy, it will cause multiple switches to trip without fault at the same time, resulting in substation failure. Or the power plant is completely shut down, and then causes a major accident in the power grid. [0003] In the existing...

Claims

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Application Information

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IPC IPC(8): H02J1/00G01R31/327H02J13/00
CPCY02B90/228Y04S20/18Y02B90/20
Inventor 向前周晓阳冯辰虎李钢孙集伟王宁刘蔚赵淑珍杨心平庄博秦俊杰刘平
Owner NORTH CHINA GRID
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