A combined electrical appliance with double busbar segmented wiring and its operation method

Abstract

The present invention relates to a combined electrical appliance in a double-bus segmented wiring form, comprising a first bus, a second bus, a third bus and a fourth bus, wherein the first bus, the second bus, the third bus and the fourth bus are all connected to a bus-coupling spacing mechanism; the bus-coupling spacing mechanism comprises a first connection connecting the second bus and the fourth bus, a second connection connecting the first bus and the third bus, and a third connection connecting the first connection and the second connection. This wiring form is only equipped with one set of bus-coupling spacing, realizing the functions of two sets of bus-coupling spacings, and the bus-coupling spacing can also serve as a bus-coupling spacing between the second bus and the third bus and a bus-coupling spacing between the first bus and the fourth bus on the basis of satisfying the requirements of serving as a connection spacing between the first bus and the second bus and a connection spacing between the third bus and the fourth bus.

Description

Technical Field

[0001] The invention relates to a combined electrical appliance, in particular to a combined electrical appliance in a double-busbar segmented wiring form and an operating method thereof. Background Art

[0002] The existing double busbar double segment wiring form is shown in the attached figure of the specification Figure 1 As shown, it includes a first busbar, a second busbar, a third busbar and a fourth busbar, and the first busbar and the second busbar, as well as the third busbar and the fourth busbar, are all connected by a connecting interval mechanism. Taking the connection form of the third busbar and the fourth busbar as an example, the connecting interval mechanism includes a main transformer interval connecting the third busbar and the fourth busbar, a line interval connecting the third busbar and the fourth busbar, and a bus coupling interval connecting the third busbar and the fourth busbar. The first busbar, the second busbar, the third busbar and the fourth busbar are respectively connected to their respective PT intervals. The second busbar and the fourth busbar, as well as the first busbar and the third busbar, are all connected by segmented intervals.

[0003] The above-mentioned double-bus double-segment wiring form has the following technical defects during use: two sets of busbar intervals are required for the four busbars, which makes the equipment structure complicated and increases the manufacturing cost; when one of the first busbar and the second busbar fails, the busbar reversal operation can be realized through the busbar interval connected to the first busbar and the second busbar, that is, the load on the faulty busbar is transferred to the non-faulty busbar. When one of the third busbar and the fourth busbar fails, the busbar reversal operation can also be realized through the busbar interval connected to the third busbar and the fourth busbar. However, the busbar reversal operation only realizes the switching use of the busbars on the same side, and cannot realize the cross-busbar reversal operation of the line, that is, it is impossible to realize the mutual busbar reversal of the second busbar and the third busbar and the mutual busbar reversal of the first busbar and the fourth busbar. For example, if the second busbar and the third busbar need to be repaired at the same time, the above wiring form, because the circuit breakers of the bus-tie interval and the segment interval connected to the second busbar and the third busbar are all opened, will cause the intervals on the first busbar and the fourth busbar to be disconnected and operate, making it impossible for the first busbar and the fourth busbar to be reversed with each other, which greatly restricts their use.

[0004] In addition to the above defects, in the above double-busbar double-segment wiring form, the second busbar and the fourth busbar are disconnected by the segmented interval, and the first busbar and the third busbar are disconnected by the segmented interval. The segmented interval can only disconnect the busbar on the same side, and cannot achieve cross-bus disconnection, which is greatly limited in use. Summary of the invention

[0005] The present invention is implemented through the following technical scheme, which provides a combined electrical appliance in the form of double-busbar segmented wiring and an operating method thereof.

[0006] According to a first aspect of the present invention, there is provided a combined electrical appliance in a double-bus segmented wiring form, comprising a first bus, a second bus, a third bus and a fourth bus, wherein the first bus, the second bus, the third bus and the fourth bus are all connected to a bus-tie spacing mechanism; the bus-tie spacing mechanism comprises a first connection connecting the second bus and the fourth bus, a second connection connecting the first bus and the third bus, and a third connection connecting the first connection and the second connection; on the first connection, a first isolating switch, a first grounding inspection switch and a second isolating switch are connected in sequence from near to far from the second bus; on the second connection, a third isolating switch, a second grounding inspection switch and a fourth isolating switch are connected in sequence from near to far from the first bus; on the third connection, a fifth isolating switch, a third grounding inspection switch, a first current transformer, a circuit breaker, a second current transformer, a fourth grounding inspection switch and a sixth isolating switch are connected in sequence.

[0007] Preferably, the first connection between the first disconnector and the second busbar is connected to the PT bay corresponding to the second busbar.

[0008] Preferably, the first connection between the second disconnector and the fourth busbar is connected to a PT bay corresponding to the fourth busbar.

[0009] Preferably, the second connection between the third disconnector and the first busbar is connected to the PT bay corresponding to the first busbar.

[0010] Preferably, the second connection between the fourth disconnector and the third busbar is connected to the PT bay corresponding to the third busbar.

[0011] Preferably, the connection position between the third wiring and the first wiring is located between the first grounding maintenance switch and the second isolating switch; the connection position between the third wiring and the second wiring is located between the third isolating switch and the second grounding maintenance switch.

[0012] Preferably, the third busbar and the fourth busbar are connected via the main transformer bay and the line bay, and the first busbar and the second busbar are connected via the main transformer bay and the line bay.

[0013] In a second aspect of the present invention, a method for operating the above-mentioned combined electrical appliance is provided, comprising the following steps:

[0014] ① The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the second isolating switch is open, the fourth isolating switch is open, and the busbar spacing mechanism serves as the busbar spacing between the first busbar and the second busbar;

[0015] ② The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the first isolating switch is opened, the third isolating switch is opened, and the busbar spacing mechanism serves as the busbar spacing between the third busbar and the fourth busbar;

[0016] ③ The first disconnector is closed, the fifth disconnector is closed, the circuit breaker is closed, the sixth disconnector is closed, the fourth disconnector is closed, the second disconnector is opened, the third disconnector is opened, and the busbar spacing mechanism serves as the busbar spacing between the second busbar and the third busbar;

[0017] ④ The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the busbar spacing mechanism serves as the busbar spacing between the fourth busbar and the first busbar;

[0018] ⑤ The first disconnector is closed, the fifth disconnector is opened, the second disconnector is closed, the third disconnector is opened, the fourth disconnector is opened, and the busbar spacing mechanism serves as the segmented spacing between the second busbar and the fourth busbar;

[0019] ⑥ The first isolating switch is open, the second isolating switch is open, the third isolating switch is closed, the fourth isolating switch is closed, the sixth isolating switch is open, and the busbar spacing mechanism serves as the segmented spacing between the first busbar and the third busbar;

[0020] ⑦ The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the second isolating switch is opened, the third isolating switch is opened, and the busbar spacing mechanism serves as the segmented interval between the second busbar and the third busbar;

[0021] ⑧The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the bus-tie spacing mechanism serves as a segmented interval between the fourth bus and the first bus.

[0022] The beneficial effects of the present invention are:

[0023] 1. This wiring form is only equipped with one set of bus-tie intervals, which realizes the role of two sets of bus-tie intervals. This bus-tie interval can not only serve as the connection interval between the first bus and the second bus and the connection interval between the third bus and the fourth bus, but also serve as the bus-tie interval between the second bus and the third bus and the bus-tie interval between the first bus and the fourth bus.

[0024] 2. The busbar bay of this connection form can simultaneously function as the segmented bay between the second busbar and the fourth busbar, as the segmented bay between the first busbar and the third busbar, as the segmented bay between the first busbar and the fourth busbar, and as the segmented bay between the second busbar and the third busbar. This provides flexibility in power supply selection when overhauling any busbar, and provides multiple possibilities.

[0025] 3. Since the busbar interval of this connection form is connected to the first busbar, the second busbar, the third busbar and the fourth busbar at the same time, it ensures that all incoming and outgoing line intervals can run on the same busbar.

[0026] 4. Since this busbar interval indirectly connects all four busbars, various wiring forms can be realized in theory, such as single busbar segmentation, cross-space double busbar wiring and double busbar double segmentation wiring, which is very flexible in actual operation.

[0027] 5. Use a single busbar interval to connect the four busbars through the interval, which serves as the busbar interval for the four busbars. When the busbar needs to be reversed (busbar switching for maintenance), it can be completed by simply closing the busbar interval.

[0028] 6. The circuit breakers and current transformers are eliminated in the segmented intervals, and the isolating switches are used as busbar segments, saving two circuit breakers. At the same time, when the busbar on one side of the isolation segment is under maintenance, the segmented interval can disconnect the busbar to meet the actual needs.

[0029] 7. By changing the structure and layout of the 4 PT compartments, the 4 PT compartments are placed in two isolation segmented compartments, saving the space of 4 compartments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of conventional double busbar segmented wiring;

[0031] Figure 2 This is a schematic diagram of double busbar segmented wiring of the present invention;

[0032] Figure 3 This is a wiring diagram of the busbar spacing mechanism of the present invention;

[0033] Figure 4 It is a cross-sectional view of the combined partition after integration of the present invention;

[0034] As shown in the figure:

[0035] 1. The first busbar, 2. The second busbar, 3. The third busbar, 4. The fourth busbar, 5. The main transformer compartment, 6. The line compartment, 7. The PT compartment, 8. The bus tie compartment mechanism, 9. The first disconnector, 10. The first grounding maintenance switch, 11. The third grounding maintenance switch, 12. The fifth disconnector, 13. The first current transformer, 14. The circuit breaker, 15. The second current transformer, 16. The third disconnector, 17. The fourth grounding maintenance switch, 18. The sixth disconnector, 19. The second grounding maintenance switch, 20. The fourth disconnector, 21. The second disconnector, 22. The first connection, 23. The third connection, 24. The second connection. DETAILED DESCRIPTION

[0036] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0037] like Figure 2 , 3 As shown, the present invention includes a first busbar 1, a second busbar 2, a third busbar 3 and a fourth busbar 4, and the first busbar 1, the second busbar 2, the third busbar 3 and the fourth busbar 4 are all connected to a busbar spacing mechanism 8. The busbar spacing mechanism 8 includes a first connection 22 connecting the second busbar 2 and the fourth busbar 4, a second connection 24 connecting the first busbar 1 and the third busbar 3, and a third connection 23 connecting the first connection 22 and the second connection 24.

[0038] The first disconnector 9, the first grounding inspection switch 10 and the second disconnector 21 are sequentially connected on the first connection 22 from near to far from the second busbar 2. The first connection 22 between the first disconnector 9 and the second busbar 2 is connected to the PT bay 7 corresponding to the second busbar 2. The first connection 22 between the second disconnector 21 and the fourth busbar 4 is connected to the PT bay 7 corresponding to the fourth busbar 4.

[0039] The third disconnector 16, the second grounding inspection switch 19 and the fourth disconnector 20 are sequentially connected on the second connection 24 from near to far from the first busbar 1. The second connection 24 between the third disconnector 16 and the first busbar 1 is connected to the PT bay 7 corresponding to the first busbar 1. The second connection 24 between the fourth disconnector 20 and the third busbar 3 is connected to the PT bay 7 corresponding to the third busbar 3.

[0040] The fifth disconnector 12, the third grounding maintenance switch 11, the first current transformer 13, the circuit breaker 14, the second current transformer 15, the fourth grounding maintenance switch 17 and the sixth disconnector 18 are sequentially connected to the third connection 23. The connection position of the third connection 23 and the first connection 22 is located between the first grounding maintenance switch 10 and the second disconnector 21. The connection position of the third connection 23 and the second connection 24 is located between the third disconnector 16 and the second grounding maintenance switch 19.

[0041] In this embodiment, the PT interval is an existing structure, and the specific structure of the PT interval is not described again.

[0042] In this embodiment, the third busbar 3 and the fourth busbar 4 are connected via the main transformer bay 5 and the line bay 6, and the first busbar 1 and the second busbar 2 are connected via the main transformer bay 5 and the line bay 6. Both the main transformer bay 5 and the line bay 6 are existing structures.

[0043] This application only occupies 3 bays by structurally integrating the PT bay, segment bay and busbar bay. Figure 4In the conventional wiring form, the four PT bays corresponding to the four busbars need to occupy 4 bays, the busbar bay occupies 1 bay, and the two sets of segment bays occupy 2 bays, that is, the conventional wiring form needs to occupy 7 bays. Therefore, the space size of the combined electrical appliance is greatly reduced, and the advantage is very obvious.

[0044] The present invention realizes that when most of the busbars are under maintenance, the line interval 6 and the main transformer interval 5 can be put into operation normally. When one of the first busbar 1, the second busbar 2, the third busbar 3, and the fourth busbar 4 is under maintenance, the maintenance busbar can be taken out of operation and the line interval 6 and the main transformer interval 5 can be operated normally by operating the bus tie interval mechanism 8. For example, when the first busbar 1 is under maintenance, the fourth isolating switch 20 is opened to disconnect the first busbar 1 and the third busbar 3 segmented intervals, the second isolating switch 21 is opened, the first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, and the third isolating switch 16 is closed. The isolating switches of all the line intervals 6 and the main transformer interval 5 on the first busbar 1 are disconnected, and the load of the first busbar 1 is completely transferred to the second busbar 2, so that the maintenance busbar is taken out of operation and the line interval 6 and the main transformer interval 5 are operated normally. Similarly, the maintenance of the remaining busbars can be achieved according to this method. For another example, the second busbar 2 and the third busbar 3 need to be repaired at the same time. Since the busbar spacing mechanism 8 simultaneously connects the first busbar 1, the second busbar 2, the third busbar 3, and the fourth busbar 4, the first busbar 1 and the fourth busbar 4 can be connected through the busbar spacing mechanism 8, ensuring that all incoming and outgoing line intervals can operate on the same busbar (connected by the first busbar 1 and the fourth busbar 4). Similarly, when the first busbar 1 and the fourth busbar 4 are repaired at the same time, all incoming and outgoing line intervals can operate on the same busbar (connected by the second busbar 2 and the third busbar 3).

[0045] The above-mentioned double busbar segmented wiring combination electrical equipment operation method comprises the following steps:

[0046] ① The first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the third isolating switch 16 is closed, the second isolating switch 21 is opened, the fourth isolating switch 20 is opened, and the bus-coupling interval mechanism 8 serves as the bus-coupling interval between the first busbar 1 and the second busbar 2;

[0047] ② The second isolating switch 21 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the fourth isolating switch 20 is closed, the first isolating switch 9 is opened, the third isolating switch 16 is opened, and the bus-coupling interval mechanism 8 serves as the bus-coupling interval of the third busbar 3 and the fourth busbar 4;

[0048] ③ The first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the fourth isolating switch 20 is closed, the second isolating switch 21 is opened, the third isolating switch 16 is opened, and the bus-coupling interval mechanism 8 serves as the bus-coupling interval of the second busbar 2 and the third busbar 3;

[0049] ④ The second isolating switch 21 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the third isolating switch 16 is closed, the first isolating switch 9 is opened, the fourth isolating switch 20 is opened, and the bus-coupling interval mechanism 8 serves as the bus-coupling interval between the fourth busbar 4 and the first busbar 1;

[0050] ⑤ The first isolating switch 9 is closed, the fifth isolating switch 12 is opened, the second isolating switch 21 is closed, the third isolating switch 16 is opened, the fourth isolating switch 20 is opened, and the bus-coupler spacing mechanism 8 serves as a segmented spacing between the second busbar 2 and the fourth busbar 4;

[0051] ⑥ The first isolating switch 9 is opened, the second isolating switch 21 is opened, the third isolating switch 16 is closed, the fourth isolating switch 20 is closed, the sixth isolating switch 18 is opened, and the bus-coupler spacing mechanism 8 serves as a segmented spacing between the first busbar 1 and the third busbar 3;

[0052] ⑦ The first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the fourth isolating switch 20 is closed, the second isolating switch 21 is opened, the third isolating switch 16 is opened, and the bus-tie spacing mechanism 8 serves as a segmented spacing between the second busbar 2 and the third busbar 3;

[0053] ⑧The second isolating switch 21 is closed, the fifth isolating switch 12 is closed, the circuit breaker 14 is closed, the sixth isolating switch 18 is closed, the third isolating switch 16 is closed, the first isolating switch 9 is opened, the fourth isolating switch 20 is opened, and the bus-tie spacing mechanism 8 serves as a segmented interval between the fourth bus 4 and the first bus 1.

[0054] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. An operating method for a combined electrical appliance in a double busbar segmented wiring form, characterized in that: The combined electrical appliance of the double-busbar segmented wiring form comprises a first busbar, a second busbar, a third busbar and a fourth busbar, and the first busbar, the second busbar, the third busbar and the fourth busbar are all connected to a busbar spacing mechanism; the busbar spacing mechanism comprises a first connection connecting the second busbar and the fourth busbar, a second connection connecting the first busbar and the third busbar, and a third connection connecting the first connection and the second connection; on the first connection, the first disconnector, the first grounding inspection switch and the second disconnector are sequentially connected from near to far from the second busbar; on the second connection, the third disconnector, the second grounding inspection switch and the fourth disconnector are sequentially connected from near to far from the first busbar; on the third connection, the fifth disconnector, the third grounding inspection switch, the first current transformer, the circuit breaker, the second current transformer, the fourth grounding inspection switch and the sixth disconnector are sequentially connected; The connection position of the third wiring and the first wiring is located between the first grounding maintenance switch and the second isolating switch; the connection position of the third wiring and the second wiring is located between the third isolating switch and the second grounding maintenance switch; The operating method comprises the following steps: ① The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the second isolating switch is open, the fourth isolating switch is open, and the busbar spacing mechanism serves as the busbar spacing between the first busbar and the second busbar; ② The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the first isolating switch is opened, the third isolating switch is opened, and the busbar spacing mechanism serves as the busbar spacing between the third busbar and the fourth busbar; ③ The first disconnector is closed, the fifth disconnector is closed, the circuit breaker is closed, the sixth disconnector is closed, the fourth disconnector is closed, the second disconnector is opened, the third disconnector is opened, and the busbar spacing mechanism serves as the busbar spacing between the second busbar and the third busbar; ④ The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the busbar spacing mechanism serves as the busbar spacing between the fourth busbar and the first busbar; ⑤ The first disconnector is closed, the fifth disconnector is opened, the second disconnector is closed, the third disconnector is opened, the fourth disconnector is opened, and the busbar spacing mechanism serves as the segmented spacing between the second busbar and the fourth busbar; ⑥ The first isolating switch is open, the second isolating switch is open, the third isolating switch is closed, the fourth isolating switch is closed, the sixth isolating switch is open, and the busbar spacing mechanism serves as the segmented spacing between the first busbar and the third busbar; ⑦ The first isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the fourth isolating switch is closed, the second isolating switch is opened, the third isolating switch is opened, and the busbar spacing mechanism serves as the segmented interval between the second busbar and the third busbar; ⑧The second isolating switch is closed, the fifth isolating switch is closed, the circuit breaker is closed, the sixth isolating switch is closed, the third isolating switch is closed, the first isolating switch is opened, the fourth isolating switch is opened, and the bus-tie spacing mechanism serves as a segmented interval between the fourth bus and the first bus.

2. The operating method of a combined electrical appliance in a double busbar segmented wiring form according to claim 1 is characterized in that: The first connection between the first disconnector and the second busbar is connected to a PT bay corresponding to the second busbar.

3. The operating method of a combined electrical appliance in a double busbar segmented wiring form according to claim 2 is characterized in that: The first connection between the second disconnector and the fourth busbar is connected to a PT bay corresponding to the fourth busbar.

4. The operating method of a combined electrical appliance in a double busbar segmented wiring form according to claim 3 is characterized in that: The second connection between the third disconnector and the first busbar is connected to the PT bay corresponding to the first busbar.

5. The operating method of a combined electrical appliance in a double busbar segmented wiring form according to claim 4, characterized in that: The second connection between the fourth disconnector and the third busbar is connected to the PT bay corresponding to the third busbar.

6. The operating method of a combined electrical appliance in a double busbar segmented wiring form according to claim 1, characterized in that: The third busbar and the fourth busbar are connected through the main transformer bay and the line bay, and the first busbar and the second busbar are connected through the main transformer bay and the line bay.

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