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A charged ice-melting topological system based on step-down capacitor and its ice-melting method

A technology of step-down capacitor and ice-melting method, which is applied in the installation of cables, electrical components, overhead lines/cable equipment, etc. narrow problem

Active Publication Date: 2021-01-15
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 DC voltage is respectively connected to different sub-conductors of the split conductors based on the live ice-melting access method of the split conductors, but this method is only applicable to two-split conductors and above, and the insulation transformation of the split conductor spacer must be carried out. Large amount; the live DC ice-melting access method based on double-circuit lines between substations requires double-circuit lines between the two substations, and one of the substations must have a side bus, and the scope of application is narrow; live DC ice-melting access based on high-frequency excitation The method requires the access part to match the line frequency at any time, and it is difficult to develop the access device
Therefore, none of the existing live-line ice-melting access methods are well suited for the access of live DC ice-melting devices in existing power grids.

Method used

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  • A charged ice-melting topological system based on step-down capacitor and its ice-melting method
  • A charged ice-melting topological system based on step-down capacitor and its ice-melting method

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Embodiment 1

[0035] see figure 1 , this embodiment provides a charged ice-melting topological system based on a step-down capacitor, including an ice-melting access part 12, and the ice-melting access part 12 includes a series resonant circuit composed of a step-down capacitor 2 and a resonant inductor 3, and a step-down capacitor The deicing device 1 with piezocapacitor 2 connected in parallel, and the series resonant circuit is connected to the transmission line 13 through a three-phase switch.

[0036] In the above-mentioned charged ice melting topology system, the resonant inductor 3 and step-down capacitor 2 are used to form a resonant circuit, the external impedance is basically zero, and it will not affect the normal power transmission of the original transmission line 13, and the live melting of the transmission line 13 can be realized. Ice, easy to design, can directly use the existing DC ice melting device, low cost, easy to implement, and can effectively improve the anti-icing l...

Embodiment 2

[0047] Corresponding to the above-mentioned embodiments, this embodiment provides a charging ice-melting method, including the following steps:

[0048] S1: Detect the ice coating on the transmission line 13, when the ice coating value on the transmission line 13 is greater than or equal to the ice coating warning value, connect the melting ice to the component 12 through a three-phase switch and connect it to the transmission line 13 to start melting ice;

[0049] S2: When the ice coating on the power transmission line 13 falls and the ice coating value is less than the ice coating warning value, disconnect the ice melting access component 12 .

[0050] In this embodiment, in S1, the ice-melting access part 12 is connected to the power transmission line 13 through a three-phase switch, specifically:

[0051] A first single-pole three-throw switch 4 and a second single-pole three-throw switch 5 are respectively connected in series on both sides of the series resonant circuit;...

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PUM

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Abstract

The invention relates to the technical field of electrical engineering, and discloses a topological system of charged melting ice based on a voltage reduction capacitor and a melting method thereof, so as to realize the reliable access of charged direct current melting ice, realize charged melting ice, remarkably improve the melting level of a power network, and enhance the ability of a transmission line to cope with large-scale rain and snow freezing disasters. The system of the invention comprises an ice melting access part which comprises a series resonant circuit composed of a voltage reduction capacitor and a resonant inductor, and an ice melting device connected in parallel with the voltage reduction capacitor, and the series resonant circuit is connected in parallel on a transmission line through a three-phase switch.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a charged ice-melting topological system based on a step-down capacitor and an ice-melting method thereof. 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 sequen...

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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