CN205864047U - A kind of outdoor 10kV Switching Station four supplies two for electric power system - Google Patents

Abstract

The utility model belongs to the technical field of power supply systems, and specifically relates to a four-supply and two-standby power supply system for an outdoor 10kV switching station; And the problem of high power supply reliability; the technical solution adopted is: an outdoor 10kV switch station four-supply and two-standby power supply system, including 10kV switch station, 110kV A substation, 110 kV B substation and 10kV switch station, also includes The first ring network cabinet, the second ring network cabinet and the third ring network cabinet, the 10kV switching station is equipped with a first incoming and outgoing line cabinet and a second incoming and outgoing line cabinet; it is suitable for distribution networks.

Description

A four-supply and two-standby power supply system for an outdoor 10kV switching station

technical field

The utility model belongs to the technical field of power supply systems, in particular to a four-supply and two-standby power supply system for an outdoor 10kV switching station.

Background technique

At present, most of the county-level urban networks are powered radially by several 10kV lines with a single power source, which cannot meet the requirements of any component in the power system, such as lines, transformers, or a system that is fault-free or disconnected due to a fault. It should still be able to maintain stable operation and normal power supply requirements. For users who require high reliability of power supply, even if the mutual supply of dual power supply ring networks is realized, it still cannot meet their high reliability power supply needs.

Utility model content

The utility model overcomes the deficiencies in the prior art, and the technical problem to be solved is: to provide a problem that can realize urban grid grid, multi-power supply, high multi-section and high power supply reliability.

In order to solve the above technical problems, the technical solution adopted by the utility model is: an outdoor 10kV switching station with four supplies and two backup power supply systems, including a 10kV switching station, a 110kV substation A, a 110kV substation B and a 10kV switching station, and Including the first ring network cabinet, the second ring network cabinet and the third ring network cabinet, the 10kV switching station is equipped with a first incoming and outgoing line cabinet and a second incoming and outgoing line cabinet;

The normally open contact Q1.1 of the first incoming and outgoing line cabinet circuit breaker Q1 is connected to the normally open contact Q2.1 of the second incoming and outgoing line cabinet circuit breaker Q2, and the normally open contact Q3 of the 110kV A substation circuit breaker Q3. 1 is connected to one end of No. 1 outgoing line, the other end of No. 1 outgoing line is connected to the normally open contact Q2.2 of the circuit breaker Q2 of the second incoming and outgoing cabinet, and the normally open contact Q3.2 of the circuit breaker Q3 of 110kV Substation A One end of the No. 2 outlet is connected, the other end of the No. 2 outlet is connected with the normally open contact Q5.1 of the circuit breaker Q5 of the first ring network cabinet, and the normally open contact Q5.2 of the circuit breaker Q5 is connected with one end of the No. 5 outlet. The other end of the No. 5 outgoing line is connected to the normally open contact Q6.1 of the circuit breaker Q6 of the second ring network cabinet, and the normally open contact Q5.3 of the circuit breaker Q5 is connected to one end of the No. 6 outgoing line;

The other end of the outgoing line No. 6 is connected to the normally open contact Q1.2 of the circuit breaker Q1 of the first incoming and outgoing line cabinet, the normally open contact Q1.3 of the circuit breaker Q1 is connected to one end of the outgoing line No. 3, and the other end of the outgoing line No. 3 Connect with normally open contact Q4.1 of circuit breaker Q4 of 110 kV substation B, connect normally open contact Q4.2 of circuit breaker Q4 with one end of No. The normally open contact Q8.1 of Q8 is connected, the normally open contact Q8.2 of the circuit breaker Q8 is connected with one end of the No. 7 outgoing line, and the other end of the No. 7 outgoing line is connected with the normally open contact Q6.2 of the circuit breaker Q6. The normally open contact Q8.3 of the circuit breaker Q8 is connected to one end of the No. 8 outgoing line, and the other end of the No. The contact Q7.2 is connected with one end of the No. 9 outgoing line, and the other end of the No. 9 outgoing line is connected with the normally open contact Q2.3 of the circuit breaker Q2.

The normally open contact Q1.1 of the first incoming and outgoing line cabinet circuit breaker Q1 is connected to the normally open contact Q2.1 of the second incoming and outgoing line cabinet circuit breaker Q2 through a cable.

The No. 1 outgoing line, No. 2 outgoing line, No. 3 outgoing line, No. 4 outgoing line, No. 5 outgoing line, No. 6 outgoing line, No. 7 outgoing line, No. 8 outgoing line and No. 9 outgoing line are all 10kV connecting lines.

The first ring network cabinet, the second ring network cabinet and the third ring network cabinet are all 10kV ring network cabinets.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model constructs the 110kV A substation and the 110kV B substation as the main power supply, constructs the outdoor 10kV switching station, the 10kV indoor switching station, the first ring network cabinet, and the second ring network cabinet connected by cables or 10kV connecting wires. The power supply network of the network cabinet and the third ring network cabinet enables the substation to divert load, mutual supply of ring network cabinets, mutual supply of switching stations, and flexible operation mode grid power supply structure, which improves the reliability of power supply and fully satisfies customers electricity demand, forming a strong county distribution network.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail;

Fig. 1 is the structural representation of the utility model;

In the figure: 1 is the 10kV switching station, 2 is the 110kV substation A, 3 is the 110kV substation B, 4 is the 10kV switching station, 5 is the first ring main unit, 6 is the second ring main unit, and 7 is the third Ring network cabinet, 8 is the first incoming and outgoing line cabinet, 9 is the second incoming and outgoing line cabinet, 10 is the cable, 11 is the No. 1 outgoing line, 12 is the No. 3 outgoing line, 13 is the No. 2 outgoing line, 14 is the No. 6 outgoing line, and 15 is 5th, 16th for 7th, 17th for 4th, 18th for 8th, and 19th for 9th.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention , not all embodiments; based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present utility model.

As shown in Figure 1, an outdoor 10kV switching station four-supply and two-backup power supply system includes 10kV switching station 1, 110kV A substation 2, 110kV B substation 3 and 10kV switching station 4, and the first ring network Cabinet 5, the second ring network cabinet 6 and the third ring network cabinet 7, the 10kV switching station 1 is provided with a first incoming and outgoing line cabinet 8 and a second incoming and outgoing line cabinet 9, the first incoming and outgoing line cabinet 8 is equivalent to I section busbar, the second incoming and outgoing line cabinet 9 is equivalent to section II busbar;

The normally open contact Q1.1 of the first incoming and outgoing line cabinet 8 circuit breaker Q1 is connected to the normally open contact Q2.1 of the second incoming and outgoing line cabinet 9 circuit breaker Q2, and the normally open contact of the 110kV A substation 2 circuit breaker Q3 Point Q3.1 is connected to one end of No. 1 outgoing line 11, the other end of No. 1 outgoing line 11 is connected to the normally open contact Q2.2 of the second incoming and outgoing line cabinet 9 circuit breaker Q2, and the normally open contact of 110kV A substation 2 circuit breaker Q3 Contact Q3.2 is connected to one end of No. 2 outlet 13, and the other end of No. 2 outlet 13 is connected to the normally open contact Q5.1 of the circuit breaker Q5 of the first ring main unit 5, and the normally open contact Q5 of the circuit breaker Q5 .2 Connect with one end of No. 5 outgoing line 15, the other end of No. 5 outgoing line 15 is connected with the normally open contact Q6.1 of the circuit breaker Q6 of the second ring network cabinet 6, and the normally open contact Q5.3 of the circuit breaker Q5 is connected with One end of No. 6 outgoing line 14 is connected;

The other end of No. 6 outgoing line 14 is connected to the normally open contact Q1.2 of the circuit breaker Q1 of the first incoming and outgoing line cabinet 8, and the normally open contact Q1.3 of the circuit breaker Q1 is connected to one end of No. 3 outgoing line 12. No. 3 outgoing line The other end of 12 is connected to the normally open contact Q4.1 of circuit breaker Q4 of 110 kV B substation 3, the normally open contact Q4.2 of circuit breaker Q4 is connected to one end of No. 4 outgoing line 17, and the other end of No. 4 outgoing line 17 It is connected to the normally open contact Q8.1 of the circuit breaker Q8 of the 10kV switching station 4, the normally open contact Q8.2 of the circuit breaker Q8 is connected to one end of the No. 7 outgoing line 16, and the other end of the No. 7 outgoing line 16 is connected to the circuit breaker Q6 The normally open contact Q6.2 of the circuit breaker Q8 is connected with one end of the No. The contact Q7.1 is connected, the normally open contact Q7.2 of the circuit breaker Q7 is connected with one end of the No. 9 outgoing line 19, and the other end of the No. 9 outgoing line 19 is connected with the normally open contact Q2.3 of the circuit breaker Q2.

The normally open contact Q1.1 of the circuit breaker Q1 of the first incoming and outgoing line cabinet 8 is connected to the normally open contact Q2.1 of the second incoming and outgoing line cabinet 9 circuit breaker Q2 through a cable 10 .

The 1st outgoing line 11, the 2nd outgoing line 13, the 3rd outgoing line 12, the 4th outgoing line 17, the 5th outgoing line 15, the 6th outgoing line 14, the 7th outgoing line 16, the 8th outgoing line 18 and the 9th outgoing line 19 are all 10kV connections Wire.

The first ring network cabinet 5, the second ring network cabinet 6 and the third ring network cabinet 7 are all 10kV ring network cabinets.

According to the distribution network operation mode, determine a power supply normal operation mode 110 kV B substation 3 enters the first incoming and outgoing line cabinet 8, the first incoming and outgoing line cabinet 8 and the second incoming and outgoing line cabinet 9 in the 10kV switching station 1 through the No. 3 outgoing line 12 Parallel running through cables 10, No. 1 outgoing line 11 enters the second incoming and outgoing line cabinet 9, the second incoming and outgoing line cabinet 9 circuit breaker Q2 normally open contact Q2.2 is in the disconnected position, and No. 6 outgoing line 14 enters the first incoming and outgoing line cabinet 8. The circuit breaker Q1 normally open contact Q1.2 of the first incoming and outgoing line cabinet 8 is in the disconnected position, that is, the 10kV switching station 1 is powered by the 110kV B substation 3 main power supply;

The first ring network cabinet 5 is connected as the main power supply by the 110kV A substation 2 through the No. 2 outlet 13, the first ring main unit 5 supplies power to the second ring main unit 6 through the No. 5 outlet 15, and the 10kV switching station 4 passes through No. 7 The outgoing line 16 is connected to the second ring network cabinet 6, and the normally open contact Q6.1 of the circuit breaker Q6 of the second ring network cabinet 6 is in the disconnected position;

The third ring network cabinet 7 is connected to the 10kV switching station 1 through No. 9 outlet 19 as the main power supply, and the 10kV switching station 4 is connected to the third ring network cabinet 7 through No. 8 outlet 18. The circuit breaker of the third ring network cabinet 7 The normally open contact Q7.1 of Q7 is in the disconnected position;

The 10kV switching station 4 is connected to the 110kV B substation 3 through the No. 4 outgoing line 17 as the main power supply.

When the power supply capacity of 10kV switching station 1 is not enough to meet the load demand of customers, the busbars of section I and section II respectively represented by the first incoming and outgoing line cabinet 8 and the second incoming and outgoing line cabinet 9 in the 10kV switching station 1 start to operate in sections. The normally open contact Q1.1 of the first incoming and outgoing line cabinet 8 circuit breaker Q1 and the normally open contact Q2.1 of the second incoming and outgoing line cabinet 9 circuit breaker Q2 are in the disconnected position, that is, the first incoming and outgoing line cabinet 8 is powered by 110 kV The No. 3 outgoing line 12 connected to the B substation 3 supplies power, and the second incoming and outgoing line cabinet 9 is powered by the No. 1 outgoing line 11 connected to the 110kV A substation 2;

When the line 11 of No. 1 outgoing line (or 12 of No. 3 outgoing line) loses power due to maintenance or failure, the normal line of No. 3 outgoing line 12 (or No. 1 outgoing line 12) can be used to supply power to the 10kV switching station 1. The first incoming and outgoing line cabinet 8 and The second incoming and outgoing line cabinet 9 runs in parallel through the cables 10;

When line 11 of line 1 and line 12 of line 3 lose power due to maintenance or failure, the first ring network cabinet 5 supplies power to 10kV switching station 1 through line 14 of line 6, or the third ring network cabinet 7 passes line 19 of line 9 The 10kV switching station 1 supplies power, and the first incoming and outgoing line cabinet 8 and the second incoming and outgoing line cabinet 9 run in parallel through cables 10;

When the No. 2 outgoing line 13 is overhauled or power failure occurs, the first ring main unit 5 supplies power to the 10kV switching station 1 through the No. 6 outgoing line 14, but the No. 5 outgoing line 15 enters the normally open contact of the first ring main unit 5 circuit breaker Q5 Q5.2 is in the off position;

The first ring network cabinet 5 and the second ring network cabinet 6 can supply each other through the No. 5 outgoing line 15 .

The power supply system consists of 110kV A substation 2 and 110kV B substation 3 to 10kV switching station 1, 10kV switching station 4, the first ring through No. Network cabinet 5, the second ring network cabinet 6 and the third ring network cabinet 7 supply power, and the operation mode of the distribution network has been further optimized. The operation mode is flexible, the power supply reliability is high, the load distribution is reasonable, and the wiring is simple and clear. The four-supply and two-standby power supply mode with mutual supply of network and hands. This power supply system greatly improves the reliability of power supply, but attention should be paid to the safe current carrying capacity of the power supply line, the breaking capacity of the outlet circuit breaker of the switching station or the ring network cabinet must not exceed the rated load capacity, and the revision of the on-site operating procedures should be done. , to ensure the operation and execution in strict accordance with the operating procedures, so as to ensure the safety and reliability of the power supply system.

The utility model constructs the 110kV A substation and the 110kV B substation as the main power supply, constructs the outdoor 10kV switching station, the 10kV indoor switching station, the first ring network cabinet, and the second ring network cabinet connected by cables or 10kV connecting wires. The power supply network of the network cabinet and the third ring network cabinet enables the substation to divert load, mutual supply of ring network cabinets, mutual supply of switching stations, and flexible operation mode grid power supply structure, which improves the reliability of power supply and fully satisfies customers electricity demand, forming a strong county distribution network.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the embodiments of the present utility model Scope of technical solutions.

Claims (4)

1. outdoor 10kV Switching Station four for two for an electric power system, including 10kV Switching Station (1), 110kV first transformer station (2), 110 kV second transformer station (3) and 10kV switching station (4), it is characterised in that: also include the first ring main unit (5), the second ring main unit (6) With the 3rd ring main unit (7), in described 10kV Switching Station (1), it is provided with the first line cabinet (8) and the second line cabinet (9)；

The normally opened contact Q1.1 of described first line cabinet (8) circuit breaker Q 1 and the second line cabinet (9) circuit breaker Q 2 normally opened Contact Q2.1 is connected, and the normally opened contact Q3.1 of 110kV first transformer station (2) circuit breaker Q 3 and one end of No. 1 outlet (11) are connected, and 1 The other end of number outlet (11) and the normally opened contact Q2.2 of the second line cabinet (9) circuit breaker Q 2 are connected, 110kV first transformer station (2) the normally opened contact Q3.2 of circuit breaker Q 3 and one end of No. 2 outlets (13) are connected, the other end of No. 2 outlets (13) and the first ring The normally opened contact Q5.1 of net cabinet (5) circuit breaker Q 5 is connected, the normally opened contact Q5.2 of circuit breaker Q 5 and one end phase of No. 5 outlets (15) Even, the other end of No. 5 outlets (15) is connected with the normally opened contact Q6.1 of the second ring main unit (6) circuit breaker Q 6, circuit breaker Q 5 normal The one end opening contact Q5.3 and No. 6 outlets (14) is connected；

The other end of No. 6 outlets (14) and the normally opened contact Q1.2 of the first line cabinet (8) circuit breaker Q 1 are connected, circuit breaker Q 1 One end of normally opened contact Q1.3 and No. 3 outlets (12) is connected, and the other end of No. 3 outlets (12) and 110 kV second transformer station (3) break The normally opened contact Q4.1 of road device Q4 is connected, and one end of the normally opened contact Q4.2 of circuit breaker Q 4 and No. 4 outlets (17) is connected, and No. 4 go out The other end of line (17) is connected with the normally opened contact Q8.1 of 10kV switching station (4) circuit breaker Q 8, the normally opened contact of circuit breaker Q 8 One end of Q8.2 and No. 7 outlets (16) is connected, and the other end of No. 7 outlets (16) is connected with the normally opened contact Q6.2 of circuit breaker Q 6, One end of the normally opened contact Q8.3 of circuit breaker Q 8 and No. 8 outlets (18) is connected, the other end of No. 8 outlets (18) and the 3rd ring main unit (7) the normally opened contact Q7.1 of circuit breaker Q 7 is connected, and one end of the normally opened contact Q7.2 of circuit breaker Q 7 and No. 9 outlets (19) is connected, and 9 Number other end of outlet (19) is connected with the normally opened contact Q2.3 of circuit breaker Q 2.

A kind of outdoor 10kV Switching Station four the most according to claim 1 for two for electric power system, it is characterised in that: described the The normally opened contact Q1.1 of one line cabinet (8) circuit breaker Q 1 is normal by cable (10) and the second line cabinet (9) circuit breaker Q 2 Open contact Q2.1 to be connected.

A kind of outdoor 10kV Switching Station four the most according to claim 1 supplies two for electric power system, it is characterised in that: described 1 Number outlet (11), No. 2 outlets (13), No. 3 outlets (12), No. 4 outlets (17), No. 5 outlets (15), No. 6 outlets (14), No. 7 go out Line (16), No. 8 outlets (18) and No. 9 outlets (19) are 10kV connecting line.

A kind of outdoor 10kV Switching Station four the most according to claim 1 for two for electric power system, it is characterised in that: described the One ring main unit (5), the second ring main unit (6) and the 3rd ring main unit (7) are 10kV ring main unit.