svg type DC ice melting device
A DC deicing and deicing technology, applied in overhead installation, irreversible AC power input conversion to DC power output, cable installation, etc., can solve the problems of high cost, poor economy, large converter capacity, etc., to achieve Improved economy, high reliability, reduced cost and volume
Active Publication Date: 2020-12-04
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology
As a result, the converter has large capacity, high cost, and poor economy, making it difficult to popularize and apply
Method used
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[0023] Such as figure 1 Shown is the circuit schematic diagram of the ice-melting device of the present invention: the SVG type DC ice-melting device provided by the present invention includes an ice-melting switch, a filter capacitor, and two groups of filter reactances (each group of filter reactances includes three reactors) , transformer and two sets of rectification circuits; the primary side of the transformer is connected to the power grid and takes power; the secondary side of the transformer outputs the power-taking signal and is connected to two sets of filter reactances at the same time, the output end of the filter reactance is connected to the input end of the rectification circuit, and the output of the rectification circuit The filter capacitors are connected in parallel between the terminals, and at the same time, the output terminals of the two sets of rectification circuits are connected to the ice-melting switch, which is used as the output terminal of the SV...
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The invention discloses a SVG type direct current de-icing system. The system includes a transformer, two sets of filter reactors, two sets of chain type current conversion chains, output ice meltingisolator, and a high frequency capacitor; each of the current conversion chains and the filter reactors form star connection SVGs, alternating current sides of the two SVGs are connected in parallel and then connected to a secondary side of the transformer, neutral points are respectively led out as positive and negative poles of a direct current and then connected to a circuit through the ice melting isolator, and the high frequency capacitor is connected in parallel between the positive and negative poles; and a phase voltage of the secondary side of the transformer is equal to half of an output direct current ice melting voltage, and the capacity of the transformer is equal to the ice melting power. The device can minimize the capacity of a converter when an output ice melting demand isconstant, thereby improving the economy of the de-icing device.
Description
technical field [0001] The invention belongs to the technical field of deicing of transmission lines in electrical engineering, and in particular relates to a DC deicing device. Background technique [0002] With the development of economy and technology, electric energy has become an indispensable secondary energy source in people's production and life, bringing endless convenience to people's production and life. Because of this, the stable and reliable operation of the power system has become one of the most important tasks of the power system. [0003] Meteorological disasters, especially ice and snow disasters, are one of the important reasons that affect the stable and reliable operation of transmission lines. Ice-covered transmission lines are likely to cause disconnection and pole down, which seriously threatens the safe operation of the power grid and the reliability of power supply. For this reason, various types of DC ice-melting devices have been developed at h...
Claims
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IPC IPC(8): H02G7/16H02M7/04
CPCH02G7/16H02M7/04
Inventor 陆佳政黄清军李波谭艳军朱思国朱远毛新果
Owner STATE GRID HUNAN ELECTRIC POWER