Medium voltage cable network networking method

A technology of cable network and networking, which is applied in the field of electric power, can solve problems such as power supply reliability of distribution network, and achieve the effects of flexible operation mode, improved reliability, and simple wiring mode

Inactive Publication Date: 2016-01-13
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In practical applications, in high-reliability power supply areas, affected by factors such as historical grids and external construction conditions, the networking mode of the medium-voltage cable network cannot transition to the standard double-ring network, and the power supply reliability of the distribution network is limited. serious problem

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Embodiment Construction

[0016] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as image 3 As shown, the networking method of the medium-voltage cable network involved in the present invention includes the following steps:

[0018] Step 1: Take 10KV busbars from two substations in the same power supply area or different 10KV busbars in the same substation as the power supply, and connect each circuit to form a ring network for open-loop operation, such as image 3 Shown in step S1 in.

[0019] Step 2: Set the contact normally open point at each ring network point, that is, two load switches or circuit breakers, such as image 3 Shown in step S2 in.

[0020] Step 3: Set the two contact normally open points of each circuit in different ring network cabinets, and set the contact normally open point in the middle section of the line at the position of the line load equalization point, such as image 3 Shown...

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Abstract

The invention provides a medium voltage cable network networking method. The method comprises the steps that 1, a 10KV bus of two substations or different 10KV buses of the same substation in the same power supply area are used as a power supply, wherein lines contact with each other to form a looped network and carry out open-loop operation; 2, a contact normally open point is arranged at each looped network point; and 3, two contact normally open points of each line are arranged in different ring main units, and a contact normally open point in the middle of the line is arranged at the halving point of a line load. When a cable network provided by the invention is in normal operation, each line load is connected with the accessed bus. When a fault occurs, the contact normally open points of the looped network points on both sides of the fault point carry out fault isolation. A load in front of the fault point is connected with an originally accessed bus. A load behind the fault point is connected with a bus which accesses a group line. In a high-reliability power supply area, if a medium voltage cable network networking method is unable to transit to a standard double looped network, the power supply reliability can be improved through the networking method provided by the invention.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a networking method for a medium-voltage cable network with simple wiring, flexible operation and high power supply reliability. Background technique [0002] With the development of cities and the improvement of people's living standards, the demand for electric energy is increasing day by day. For this reason, my country's distribution network has undergone years of construction and transformation, but the foundation of the distribution network is still relatively weak. The network of the medium-voltage distribution network The lack of standardized management of the rack structure, the contradiction between the reliability of the power supply of the distribution network and the needs of users has become increasingly prominent, and the typical wiring modes of the medium-voltage cable network in the prior art include radial type and single (double) ring type. [0003] Among them, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 徐有琳李峰龚俊祥李荣超孔亮曲庭余
Owner STATE GRID CORP OF CHINA
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