Method and device for melting ice by feeding direct current to ice-coated lines
A technology of direct current and ice-melting method, which is applied in cable installation, electrical components, overhead installation, etc., can solve problems such as concentrated heating, achieve the effect of preventing excessive temperature, uniform and stable temperature range, and satisfying stability
Active Publication Date: 2018-09-07
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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[0004] The purpose of the present invention is to provide a method and device for melting ice by passing direct current to the ice-coated line, so as to solve the problem of localized heat generation, thereby ensuring the stability of line performance for a long time
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[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] like Figure 1-5 As shown, the object of the present invention is to provide a method and system for melting ice by feeding DC current to the ice-coated line, so as to improve the efficiency of melting ice on the ice-covered line, and solve the problem of local concentrated heating, so as to ensure the long-term protection of the line performance stability.
[0047] In order to make the above objects, features and advantages of the present invention mo...
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The invention discloses a deicing method and apparatus for connecting a direct current to an ice-covered circuit. The deicing method comprises the steps of determining a current range of the connected direct current according to the specification of the ice-covered circuit to obtain a peak current; connecting the direct current to the ice-covered circuit; increasing the current value of the direct current from zero to the current value of the peak current after a first time interval; maintaining the current value of the peak value for a second time interval, and then reducing the current value of the peak value in a third time interval to obtain a low-low current value; maintaining the low-low current value for a fourth time interval; judging whether the ice-covered circuit achieves an expected deicing degree or not, if not, not connecting the direct current; and if so, returning to execute the step of increasing the direct current from zero to the peak current after the first time interval. By adoption of the deicing method and apparatus disclosed by the invention, the deicing efficiency is effectively improved.
Description
technical field [0001] The invention relates to the field of direct current ice melting, in particular to an ice melting method and device for feeding direct current to ice-coated lines. Background technique [0002] DC icing mainly applies DC voltage to the transmission line and short-circuits the end of the transmission line to make the wire heat up and melt the ice of the transmission line, so as to avoid the line being broken due to icing. The principle of DC ice melting technology is to use the ice-coated line as a load, apply a DC power supply, and use a lower voltage to provide a short-circuit current to heat the wire to melt the ice. However, the selection of DC current ice-melting operating parameters such as the applied current power and duration is mainly based on the DC power and the resistivity of the target line to roughly convert a DC current ice-melting technical specification, and through the melting of the relevant DC current Ice experience to operate. Fo...
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IPC IPC(8): H02G7/16
CPCH02G7/16
Inventor代发明蒋欣张仁奇王凌旭陈涛李波梁宇
OwnerELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD