Double-loop network distribution system

Abstract

The present invention discloses a double-loop network distribution system which comprises a first substation, a second substation, two main loops formed at the output ends of the first substation and the second substation, and at least one set of contact switch installed at each of the main loops. A first main loop is formed between a first substation bus A and a second substation bus A, and a second main loop is formed between a first substation bus B and a second substation bus B. By using the contact switches, the first main loop and the second main loop are connected to the first substation and the second substation through circuit breakers. The contact switches are connected to a load. Through arranging multiple sets of contact switches, the grade power supply can be realized, through controlling the circuit breakers at the bus ends of the first substation and the second substation, the whole loop can be powered separately, the power cut of a whole network caused by the power failure of one set of substation is avoided, and the reliability is improved.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a double-ring network distribution system. Background technique [0002] Grid planning in power grid planning has a significant impact on the high-quality, safe, and economical operation of the power system, and scientific and effective planning schemes are its foundation. The planning of 110kV grid structure should start with the investigation and study of the current situation of the high-voltage grid in the planning area, and use the results of load distribution prediction as the basic data to rationally arrange the site of high-voltage substations, solve the weak links of the grid, optimize the grid structure, and improve the power supply capacity and adaptability of the grid and level of automation. Planning should be combined with short-term and long-term, and new construction and renovation, so as to realize the standardization of power grid wiring and facil...

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Problems solved by technology

[0009] At present, the domestic 110KV power grid mainly has chain, radial, hand-in-hand and T-shaped wiring methods. Among them, T-shaped wiring is divided into single T, double T and 3T. The existing 110KV power grid is mainly double-circuit chained. There are the following deficiencies: 1. There are many devices in the substation, and the operation and maintenance are complicated; 2. Some lines are backup lines, resulting in waste of resources; 3. The single power supply of the substation has the risk of voltage loss in the whole station and low reliability

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