A 10kv station type DC ice melting device
A DC ice melting, station-type technology, applied in overhead installation, cable installation, electrical components, etc., can solve the problem of short ice melting distance, etc., to achieve the effect of long line length, reduced volume, and high control accuracy
Inactive Publication Date: 2016-10-05
广西宏湖水利电业科技发展有限公司 +1
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Problems solved by technology
Power frequency AC ice melting, due to the limitation of transmission line reactance, under the same ice melting power capacity, the ice melting distance is shorter than DC ice melting
Method used
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[0039] As shown in the figure, a 10KV station-use DC ice-melting device is used to rectify 10KV AC power into DC power to de-ice transmission lines. It is mainly composed of circuit breaker 1, reactor 2, and rectifier unit 3. , ice-melting circuit changeover switch 6, pulse power amplifying isolation unit 8, and DSP pulse controller 7; one side of the circuit breaker 1 introduces the 10KV power supply of the substation, and the other side is connected with the reactor 2, and the outlet of the reactor 2 is connected to the The power input line of the rectification unit 3 is connected, the DC output line of the rectification unit 3 is connected with the ice-melting line switch 6, and the other side of the ice-melting line switch 6 is connected with the ice-melting line; between the circuit breaker 1 and the reactor 2 A three-phase current transformer CT and a voltage transformer PT are also installed on the line, and a Hall current sensor 5 is also installed on the DC outlet of t...
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The invention discloses a 10KV station-used type DC ice melting device which is used for rectifying a 10KV AC power supply into a DC power supply to perform deicing operation for a power transmission line. The 10KV station-used type DC ice melting device is mainly composed of a breaker, an electric reactor, a rectification unit, an ice melting line switching switch, a pulse power amplification isolation unit and a DSP pulse controller. The 10KV power supply of a transformer station is introduced from one side of the breaker, and the other side is connected with the electric reactor. An outgoing wire of the electric reactor is connected with a power supply incoming wire of the rectification unit. The DC outgoing wire of the rectification unit is connected with the ice melting line switching switch, and the other side of the ice melting line switching switch is connected with an ice melting line. The DC ice melting device is simple in system structure, reliable in operation, large in capacity and low in price. Controlling is realized by adopting a digital signal processor so that the DC ice melting device is high in accuracy and rapid in speed. Besides, the DC ice melting device has ice melting current open and closed loop control functions and a pulse detection function and the like so that the power transmission line ice melting operation can be reliably and effectively performed.
Description
technical field [0001] The invention relates to an ice-melting device used for ice-melting operations when a power transmission line walks on ice, in particular to a DC ice-melting device used in a 10KV substation. Background technique [0002] In many areas in southern my country, due to geographical location, climate and other reasons, there are different degrees of icing on transmission lines every year. Icing on lines will cause disasters such as tower collapse and insulation drop on the transmission network, directly endangering the operation safety of the power system. . Among them, 2008 was the most serious. This ice disaster caused serious damage to my country's southern, central, and eastern power grids, and directly led to large-scale and long-term outages of many transmission lines in Guangdong, Guangxi, Yunnan, Guizhou, Jiangxi, and Hunan. Seriously affected the normal production and life of the people, and caused huge economic losses. [0003] In order to deal ...
Claims
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IPC IPC(8): H02G7/16
Inventor 黄有斌兰飞彭庆良王庆华李广岩陈新苗黄任韦刚毅曾建
Owner 广西宏湖水利电业科技发展有限公司