Bifunctional direct current ice melting apparatus based on voltage source type current converter and ice melting method thereof

A voltage source type, DC ice-melting technology, applied in cable installation, output power conversion device, AC power input conversion to DC power output, etc., can solve the high reactive power demand of ice-melting power supply and the influence of system stability Large, difficult system power flow and other problems, to achieve the effect of reducing reactive power, improving power quality, and improving power factor
CN102496898AInactive Publication Date: 2012-06-13SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2012-06-13
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a bifunctional direct current ice melting apparatus based on a voltage source type current converter and an ice melting method thereof. The direct current ice melting apparatus is characterized in that: the apparatus is in a bifunctional working mode. More particularly, in an ice-melting mode, the apparatus is in a rectification working state and can provide enough direct currents to carry out ice melting on an icing line; and in a non-ice melting mode, a corresponded switch switching and controlling strategy is utilized, so that the apparatus is in an inversion working state and is used as a static synchronous compensator (STATCOM) for operation; and thus, system reactive compensation is realized. Compared with a current source type ice melting apparatus, the provided novel apparatus enables an ice melting power to be increased, reactive power consumption to be reduced and harmonic output to be optimized; besides, the main characteristic of the apparatus is as follows: a dual mode working performance is designed; that is, energy-saving economic objectives of three-phase uniform ice melting and ice melting current minimization can be achieved in minimum ice melting time under an ice melting mode.
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Description

technical field

[0001] The invention relates to a dual-function DC deicing device based on a voltage source type converter and a deicing method thereof, belonging to the field of long-distance AC and DC power transmission. Background technique

[0002] The icing of transmission lines in winter is one of the major natural disasters of the power system. Severe icing will lead to a sharp decline in the mechanical and electrical performance of transmission lines, causing power supply interruptions, and even serious accidents such as grid disconnection, and the repair work is difficult and takes a long time. ,big influence. Therefore, it is of great significance to strengthen the research on the ice melting technology of transmission lines to improve the stability of the power system and promote the development of the national economy.

[0003] At present, the deicing methods of transmission lines at home and abroad can be divided into AC deicing method and DC deicing method. T...

Claims

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