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System debug method of movable type direct current ice melting apparatus based on gate turn-off (GTO) device

A technology of DC ice melting and debugging method, which is applied in the direction of measuring devices, instruments, electrical components, etc., can solve the problems of narrow application scope of power electronic technology and low efficiency of debugging methods.

Active Publication Date: 2015-05-13
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional DC ice melting device narrows the application range of power electronics technology, and the traditional debugging method is inefficient

Method used

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  • System debug method of movable type direct current ice melting apparatus based on gate turn-off (GTO) device
  • System debug method of movable type direct current ice melting apparatus based on gate turn-off (GTO) device
  • System debug method of movable type direct current ice melting apparatus based on gate turn-off (GTO) device

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Embodiment

[0061] Relying on the Mengshan-Yongxiu I / II circuit (4×LGJ-400) at the outlet of the Jiangxi Mengshan 500KV substation, the method of the present invention is used to debug the ice-melting device. For wiring, see figure 1 with figure 2 . The line is 53 kilometers long. After the two phases of A and B are short-circuited, the impedance of one to two circuits is about 1.34 ohms. When the line flow is increased to 4000A, the output voltage of the converter is 5360, and the duty ratio of the chopper output circuit is about 0.95.

[0062] Ice-melting device Each power trolley consists of 35kV input power switchgear, 35kV / 520V multi-winding transformer, 5MW capacity 5MW IGBT-based four-quadrant full-bridge rectifier, output switchgear, water / air cooling device and container type for loading the above equipment trailer composition.

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Abstract

The invention relates to a system debug method of a movable type direct current ice melting apparatus based on a gate turn-off (GTO) device. The method comprises the following steps: (1) a direct current ice melting apparatus carries out a low voltage signal test without an ice melting line; (2) the direct current ice melting apparatus carries out a zero load test without the ice melting line; (3) the direct current ice melting apparatus carries out an undercurrent test without the ice melting line; (4) the direct current ice melting apparatus carries out heavy current test and ice melting load line temperature rise test. Thereby, the invention can guarantee that the system debug can examine the performance of the apparatus. The system debug method provided in the invention is reliable and feasible.

Description

technical field [0001] The invention relates to a debugging method in the field of DC deicing of ultra-high voltage transmission lines, in particular to a system debugging method based on a mobile DC deicing device that can be shut off. Background technique [0002] my country is a country with severe icing on transmission lines of the power system. Icing on high-voltage transmission lines is a serious hazard to my country's power system, and the DC ice-melting device has played a huge role in improving the anti-icing and disaster reduction capabilities of ultra-high voltage AC power grids. [0003] Traditional DC deicing devices use converters composed of uncontrollable valves (diodes) and semi-controlled valves (thyristors) to melt the ice by using the heat generated by the large DC current in the wire resistance. The debugging method of the device is also these types. The traditional DC ice melting device narrows the application range of power electronics technology, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/16G01R31/00
Inventor 贺之渊刘栋黄学平范瑞祥胡道明易荣庞辉杨岳峰赵岩
Owner CHINA ELECTRIC POWER RES INST
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