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A charged ice-melting topological system based on resonant circuit and its ice-melting method

A technology of resonant circuit and ice melting method, which is applied in the installation of cables, electrical components, overhead lines/cable equipment, etc., can solve the problems of narrow application range, large system consumption, and high requirements for line structure, and achieves easy design and reduced device size. Loss, the effect of improving ice resistance

Active Publication Date: 2020-02-04
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the live ice-melting topology system based on the unified power flow controller consumes a lot of energy and easily leads to system instability; the live-line ice-melting topology structure based on double-circuit lines between substations has high requirements on the line structure and narrow application range; based on load current transfer The charged ice-melting topology can only be applied to 4-split and above conductors, and the ice-melting efficiency is low
The current topological structure of electrified ice melting cannot be well promoted and used, and cannot solve the adverse consequences caused by the power outage and ice melting of the existing system

Method used

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  • A charged ice-melting topological system based on resonant circuit and its ice-melting method
  • A charged ice-melting topological system based on resonant circuit and its ice-melting method
  • A charged ice-melting topological system based on resonant circuit and its ice-melting method

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Effect test

Embodiment 1

[0033] like figure 1 As shown, this embodiment provides a live ice melting topology system based on a resonant circuit, including an ice melting switch 7 connected in parallel to the power transmission line 3, and an ice melting switch 7 connected in series to the outside of the ice melting switch 7 for generating ice melting voltage A deicing device 8, a parallel resonant circuit 4 connected in parallel to the power transmission line 3 for short-circuiting the power transmission line 3, a first series resonant circuit 2 and a second series resonant circuit 5 connected in series on the power transmission line 3;

[0034] Wherein, the first series resonant circuit 2 is arranged between the first substation 1 and the ice melting switch 7 , and the second series resonant circuit 5 is arranged between the parallel resonant circuit 4 and the second substation 6 .

[0035] In the above system, the resonant circuit is used to melt the ice. On the one hand, it can effectively reduce t...

Embodiment 2

[0050] Corresponding to the above-mentioned embodiments, this embodiment provides a resonant circuit-based electrified deicing method, including the following steps:

[0051] S1: Detect the icing situation on the transmission line 3. When the icing value on the transmission line 3 is greater than or equal to the icing warning value, short-circuit the parallel resonant circuit 4 and the transmission line 3, and disconnect the first series resonant circuit 2 and The transmission line 3, and disconnect the second series resonant circuit 5 and the transmission line 3;

[0052] S2: Adjust the gear of the ice-melting device 8, close the ice-melting switch 7 to start melting the ice until the ice on the transmission line 3 falls off, and then turn off the ice-melting switch 7.

[0053] In this embodiment, in S1, the parallel resonant circuit 4 and the power transmission line 3 are short-circuited, the first series resonant circuit 2 and the power transmission line 3 are disconnected,...

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Abstract

The invention relates to the technical field of electrical engineering, and discloses a resonance circuit-based charged ice melting topology system and an ice melting method thereof, aiming at realizing ice melting of multiple lines without affecting the normal power supply of the power transmission lines, thus further improving the ice endurance level of a power grid. The system provided by the invention comprises ice melting change-over switches connected with the power transmission lines in parallel, an ice melting device which is connected with the outer sides of the ice melting change-over switches in series and is used for generating an ice melting voltage, a parallel resonant circuit connected with the power transmission lines in parallel and is used for short connection with the power transmission lines, and a first series resonant circuit and a second series resonant circuit which are connected with the power transmission lines in series, wherein the first series resonant circuit is arranged between a first substation and the ice melting change-over switches, and the second series resonant circuit is arranged between the parallel resonant circuit and a second substation.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a resonant circuit-based charged ice-melting topological system and an ice-melting method. Background technique [0002] In recent years, rain, snow and freezing disasters have occurred frequently in the southern region, which has seriously affected the operation of the power grid. Current ice melting is currently the most direct and effective measure to deal with power grid ice disasters. However, the existing ice melting methods are mainly based on power outages. On the one hand, a large number of users will be cut off after a power outage, which will affect the quality service of the power supply company and affect people’s daily life; on the other hand, when multiple lines When the line needs to melt ice, in order to ensure the safety of power supply, the power cannot be cut off at the same time to melt the ice, and it must be carried out sequentially, so that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/16H02G1/02
CPCH02G1/02H02G7/16
Inventor 陆佳政朱远李波谭艳军朱思国黄清军毛新果
Owner STATE GRID HUNAN ELECTRIC POWER
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