A AC/DC hybrid power distribution system with important loads

Abstract

The invention discloses an important load-containing AC (Alternating Current) / DC (Direct Current) hybrid power distribution system. The important load-containing AC / DC hybrid power distribution system comprises a transformer substation, an AC / DC bidirectional converter, a total switch piece, a filter capacitor, at least one AC load, at least one power distribution box connected with a first branch switch piece and an electric vehicle charging station, wherein the electric vehicle charging station comprises a smoothing reactor, a DC bus, an in-station load connected with a DC / AC inverter and at least one electric vehicle charging pile connected with a DC / DC converter. According to the important load-containing AC / DC hybrid power distribution system disclosed by the invention, DC of a distributed generation can be fed into an AC power distribution network without erecting a new circuit, so that not only are the running cost and the investment cost reduced, but also the advantages of AC power supplying and DC power supplying of the power distribution network are synthesized, and the important load-containing AC / DC hybrid power distribution system has the obvious advantage and a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of increasing the transmission power of a distribution network, in particular to an AC / DC hybrid power distribution system with important loads. Background technique [0002] In order to optimize the energy structure, alleviate the pressure of environmental protection, and make the development of the power grid more in line with the development requirements of a conservation-minded society, the "Twelfth Five-Year Plan" of the power industry comprehensively considers the long-term power grid development strategy and the economy of various power structures, and proposes The policy of "prioritizing the development of hydropower, optimizing the development of coal power, vigorously developing nuclear power, actively promoting new energy power generation, moderately developing centralized natural gas power generation, and developing distributed power generation according to local conditions". However, with the ra...

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the existing technology, the present invention solves the problems of high cost, large engineering quantity, long construction period and serious impact on users in the existing scheme of transmitting AC and DC in the distribution network, and proposes an AC with important loads. The DC hybrid power distribution system can directly feed the DC power of the distributed power into the AC distribution network without erecting new lines

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