CN201868899U

CN201868899U - Double-loop network wiring mode of middle and low-voltage distribution network

Info

Publication number: CN201868899U
Application number: CN201020616886XU
Authority: CN
Inventors: 刘光辉; 王志杰; 王素玲
Original assignee: Anyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Anyang Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2010-11-22
Filing date: 2010-11-22
Publication date: 2011-06-15
Anticipated expiration: 2020-11-22

Abstract

The utility model discloses a double-loop network wiring mode of a middle and low-voltage distribution network, which comprises two transformer substations, wherein at least one middle and low-voltage distribution network site is arranged between the two transformer substations; two distribution loops are respectively arranged on each transformer substation; two groups of terminals are respectively arranged in each middle and low-voltage distribution network site; the first group of terminals in each middle and low-voltage distribution network site are connected together by the first loop to form a ring; the second group of terminals in each middle and low-voltage distribution network site are connected together by the second loop to form a ring; and two loops form two rings. The double-loop network wiring mode adopting the technical scheme has the advantages that: (1) the middle and low-voltage distribution network has sufficient power supply capability and can meet the requirement for increasing various power consumption loads; and (2) the relevant specified requirements for the power supply quality, the economy and the reliability can be met.

Description

The low and medium voltage distribution network dual-ring network mode of connection

Technical field

The utility model relates to the improvement to the mode of connection of low and medium voltage distribution network.

Background technology

Because the power supply deficiency of layouting, cause that rate of qualified voltage is low, line loss is big, reliability is low in the low and medium voltage distribution network, supply power mode is dumb; Rack is built lack of standardization, causes some areas contact not enough, and some areas contact is too much, and the artificial origin causes power failure; Part hand in hand circuit does not have and is made for usefulness mutually, get in touch with unreasonable, contact too much, moves to dispatching of power netwoks and brings difficulty.

Summary of the invention

The purpose of this utility model provides a kind of low and medium voltage distribution network dual-ring network mode of connection that improves utilization rate of equipment and installations, improves power supply reliability.

For achieving the above object, the utility model is by the following technical solutions:

The utility model comprises two transformer stations, at least one low and medium voltage distribution network point is set between described two transformer stations, each transformer station all is provided with two loops, two groups of terminals all are set in each low and medium voltage distribution network point, wherein first loop links together first group of terminal in each low and medium voltage distribution network point and constitutes ring, second links together second group of terminal in each low and medium voltage distribution network point constitutes ring, and two loops constitute two rings altogether.

In two the low and medium voltage distribution network points adjacent with two transformer stations, two groups of terminals interconnect.

Adopt the utility model of technique scheme, have the following advantages:

1) low and medium voltage distribution network has sufficient power supply capacity, can satisfy all kinds of power loads and increase needs;

2) power supply quality, economy, reliability reach the requirement of pertinent regulations;

3) optimize network configuration, appropriateness improves the distribution network planning construction criteria, the guarantor who improves the city responsible consumer measure of powering, and electric network composition is reasonable, subregion is clear, possesses stronger adaptability, and possesses certain accident of resisting and the ability of preventing and reducing natural disasters.

4) improve network configuration by transformation, progressively optimize the voltage level, improve performance driving economy, coordinate mutually with the social environment and the level of economic development.

Description of drawings

Fig. 1 is the utility model dual-ring network winding diagram.

Fig. 2 is the utility model list mother partition dual-ring network winding diagram.

Embodiment

As shown in Figure 1, the utility model comprises two transformer stations, and at least one low and medium voltage distribution network point is set between two transformer stations, and each low and medium voltage distribution network point is the inner city in city, important block or the like.Be example with four in the present embodiment, can certainly be five, six or even more a plurality of.Each transformer station all is provided with two loops, and promptly first transformer station 1 is provided with loop A line, B line, and second transformer station is provided with loop C line, D line; Two groups of terminals all are set in each low and medium voltage distribution network point, promptly among the first low and medium voltage distribution network point K1 terminal I and terminal II are set, by that analogy.When connecting, first loop linked together first group of terminal in each low and medium voltage distribution network point constitute ring, second links together second group of terminal in each low and medium voltage distribution network point constitutes ring, and two loops constitute two rings altogether, and dual-ring network wiring pattern as shown in Figure 1.If the pattern that the looped network station adopts double-bus not establish block switch, dual-ring network are two Single-ring networks of independently handing in hand in essence.Under the prerequisite that satisfies " N-1 ", utilization rate of equipment and installations is 50%.

In addition, the utility model can also be done following improvement: in two the low and medium voltage distribution network points adjacent with two transformer stations, two groups of terminals interconnect.In order to improve the utilization rate of equipment and installations of dual-ring network, can make two looped network stations of close power supply point into single mother partition pattern, can form single mother partition dual-ring network wiring as shown in Figure 2 like this.Under the prerequisite that satisfies " N-1 ", utilization rate of equipment and installations 67%.

To sum up, as the target rack, transitionality and flexibility are all very good with dual-ring network for the utility model, and load develops into mid-term and can adopt the dual-ring network wiring, can adopt the wiring of single mother partition dual-ring network when saturated.

Claims

1. low and medium voltage distribution network dual-ring network mode of connection, it comprises two transformer stations, at least one low and medium voltage distribution network point is set between described two transformer stations, it is characterized in that: each transformer station all is provided with two loops, two groups of terminals all are set in each low and medium voltage distribution network point, wherein first loop links together first group of terminal in each low and medium voltage distribution network point and constitutes ring, second links together second group of terminal in each low and medium voltage distribution network point constitutes ring, and two loops constitute two rings altogether.

2. the low and medium voltage distribution network dual-ring network mode of connection according to claim 1 is characterized in that: in two the low and medium voltage distribution network points adjacent with two transformer stations, two groups of terminals interconnect.