CN104852286A

CN104852286A - Double-loop network distribution system

Info

Publication number: CN104852286A
Application number: CN201510279686.7A
Authority: CN
Inventors: 刘孝刚; 常华; 段正玉; 梅晓辉; 杨俊广; 赵海洲; 宋鹰; 杨海跃; 高冰
Original assignee: North China Electric Power University; Hengshui Power Supply Co of State Grid Hebei Electric Power Co Ltd
Current assignee: North China Electric Power University; Hengshui Power Supply Co of State Grid Hebei Electric Power Co Ltd
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2015-08-19

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

Dual-ring network distribution system

Technical field

The present invention relates to distribution network technology field, particularly relate to dual-ring network distribution system.

Background technology

In Electric Power Network Planning, space truss project has great impact for the high-quality of electric power system, safety, economical operation, and science, effective programme are then its basic places.110kV Net Frame of Electric Network is planned, should start with from investigation planning region high-voltage fence present situation, data based on the result of power load distributing prediction, reasonable Arrangement high voltage substation site, solve electrical network weak link, optimize electric network composition, improve the power supply capacity of electrical network, adaptability and automatization level.Planning will be accomplished to combine with long term in the recent period, newly-builtly combines with transformation, realizes power network wiring standardization and facility standardization.At safe operation of electric network under the reliable prerequisite with ensureing the quality of power supply, reach the advanced technology of power grid construction and the target of economical rationality.

For 110kV Electric Power Network Planning, its emphasis is goal in research rack, namely studies and formulate the overall of electrical network and long term growth target.Target net should reach following requirement:

(1) network configuration is reasonable, and layout is simple and clear, reliable, clear layer, flexible operation, is conducive to preventing regionality to collapse net or large-area power-cuts;

(2) there is sufficient power supply capacity, adapt to the long-range needs of load and power construction development;

(3) between the power transformation total capacity of each step voltage and power load, defeated, become, eurythmy between controller switching equipment capacity, between meritorious and reactive capability, economical rationality;

(4) security and stability of electrical network, should meet the requirement of " guiding rules of power system safety and stability ".The power supply reliability of electrical network at different levels should meet the regulation of " power supply safety criterion ";

(5) in long-term plan framework, the layout of buildings of electrical network should the development of suitable advanced load, should consider far and near combination, reasonable arrangement.

Current domestic 110KV electrical network mainly contains chain type, radiant type, the hand in hand mode of connection such as formula and T-shaped, wherein T-shaped wiring has and is divided into single T, double T and 3T, existing 110KV electrical network, based on double back chain type, has the following disadvantages: 1, power transformation station equipment is many, and operation and maintenance is complicated; 2, some circuit is extension wire, causes the wasting of resources; 3, transformer station's power supply is single exists no-voltage of entire station risk, and reliability is low.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of dual-ring network distribution system, interconnection switch is utilized to be connected with the first transformer station and the second transformer station by circuit breaker with the second major loop by the first major loop, interconnection switch connects load, arrange and overlap interconnection switch more, can sectional power supply be realized, by controlling the circuit breaker of the first transformer station and the second substation bus bar end, can separately to whole loop power supply, avoid causing the whole network to have a power failure because of during wherein a set of transformer station's dead electricity, improve reliability.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of dual-ring network distribution system, comprise two major loops that the first transformer station, the second transformer station, the first transformer station and second transformer station's output are formed and at least one cover interconnection switch be arranged on every bar major loop, form the first major loop between first substation bus bar A and the second substation bus bar A, between the first substation bus bar B and the second substation bus bar B, form the second major loop.

Described first substation bus bar A and the second substation bus bar A all and between the first major loop arranges circuit breaker, and described first substation bus bar B and the second substation bus bar B all and between the second major loop arranges circuit breaker.

Described interconnection switch output connects load.

The beneficial effect adopting technique scheme to produce is: utilize interconnection switch to be connected with the first transformer station and the second transformer station by circuit breaker with the second major loop by the first major loop, interconnection switch connects load, arrange and overlap interconnection switch more, sectional power supply can be realized, by controlling the circuit breaker of the first transformer station and the second substation bus bar end, can separately to whole loop power supply, avoid causing the whole network to have a power failure because of during wherein a set of transformer station's dead electricity, improve reliability.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

In the accompanying drawings: 1, the first substation bus bar A; 2, the first substation bus bar B; 3, circuit breaker; 4, interconnection switch; 5, the first major loop; 6, the second major loop; 10, second station bus B is cashed; 11, second station bus A is cashed.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.

For solving the low problem of existing electric network reliability; the invention provides a kind of dual-ring network distribution system as shown in Figure 1; comprise two major loops that the first transformer station, the second transformer station, the first transformer station and second transformer station's output are formed and at least one cover interconnection switch 4 be arranged on every bar major loop; formed between first substation bus bar A1 and the second substation bus bar A11 between the first major loop 5, first substation bus bar B2 and the second substation bus bar B10 and form the second major loop 6; Described first substation bus bar A1 and the second substation bus bar A11 all and between the first major loop 5 arranges circuit breaker 3, and described first substation bus bar B2 and the second substation bus bar B10 all and between the second major loop 6 arranges circuit breaker 3; Described interconnection switch 4 output connects load.

In embody rule process, after first transformer station and the second transformer station formation dual-ring network are powered, rack is more stable, electrical network layout is more scientific and reasonable, dispatch more flexible, the stability of safe operation and power supply quality obtain further raising, are highly suitable for requiring high, not allow power failure responsible consumer to power supply reliability.

In a word, the present invention utilizes interconnection switch to be connected with the first transformer station and the second transformer station by circuit breaker with the second major loop by the first major loop, interconnection switch connects load, arrange and overlap interconnection switch more, can sectional power supply be realized, by controlling the circuit breaker of the first transformer station and the second substation bus bar end, can separately to whole loop power supply, avoid causing the whole network to have a power failure because of during wherein a set of transformer station's dead electricity, improve reliability.

Claims

1. a dual-ring network distribution system, it is characterized in that: comprise two major loops that the first transformer station, the second transformer station, the first transformer station and second transformer station's output are formed and at least one cover interconnection switch (4) be arranged on every bar major loop, first substation bus bar A(1) and the second substation bus bar A(11) between form the first major loop (5), the first substation bus bar B(2) and the second substation bus bar B(10) between form the second major loop (6).

2. dual-ring network distribution system according to claim 1, it is characterized in that: described first substation bus bar A(1) and the second substation bus bar A(11) circuit breaker (3) is set, described first substation bus bar B(2 between all and the first major loop (5)) and the second substation bus bar B(10) circuit breaker (3) is set between all and the second major loop (6).

3. dual-ring network distribution system according to claim 2, is characterized in that: described interconnection switch (4) output connects load.