CN214069584U - Combined electrical apparatus of double-bus sectional wiring form - Google Patents

Combined electrical apparatus of double-bus sectional wiring form Download PDF

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Publication number
CN214069584U
CN214069584U CN202120125447.7U CN202120125447U CN214069584U CN 214069584 U CN214069584 U CN 214069584U CN 202120125447 U CN202120125447 U CN 202120125447U CN 214069584 U CN214069584 U CN 214069584U
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Prior art keywords
bus
isolating switch
bus bar
connection wire
switch
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CN202120125447.7U
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柳如见
邓东印
梁孝峰
高瑞东
张凯
陈旭
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Shandong Taikai High Volt Switchgear Co Ltd
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Shandong Taikai High Volt Switchgear Co Ltd
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Abstract

The utility model relates to a double-bus sectional wiring type combined electrical apparatus, which comprises 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 with a bus-tie spacing mechanism; the bus-tie spacing mechanism comprises a first connection wire for connecting the second bus and the fourth bus, a second connection wire for connecting the first bus and the third bus, and a third connection wire for connecting the first connection wire and the second connection wire. The wiring form is only provided with 1 set of bus coupler interval, the effect of two sets of bus coupler intervals is realized, and the bus coupler intervals can also be used as the bus coupler intervals of the second bus and the third bus and the bus coupler intervals of the first bus and the fourth bus on the basis of meeting the requirement of the bus coupler intervals of the first bus and the second bus and the third bus and the fourth bus.

Description

Combined electrical apparatus of double-bus sectional wiring form
Technical Field
The utility model relates to a combined electrical apparatus especially relates to a combined electrical apparatus of two generating lines segmentation wiring forms.
Background
The existing double-bus double-section wiring form is shown in the attached drawing figure 1 of the specification, and comprises 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 connected through a connection partition mechanism. Taking the connection form of the third bus bar and the fourth bus bar as an example, the interconnection spacing mechanism comprises a main transformer spacing for connecting the third bus bar and the fourth bus bar, a line spacing for connecting the third bus bar and the fourth bus bar, and a bus-interconnection spacing for connecting the third bus bar and the fourth bus bar. And respective PT intervals are respectively connected to the first bus bar, the second bus bar, the third bus bar and the fourth bus bar. The second bus bar and the fourth bus bar and the first bus bar and the third bus bar are connected through a subsection interval.
The double-bus double-subsection wiring form has the following technical defects in the use process: the four buses need to be provided with two sets of bus-coupler intervals, so that the equipment structure is complex, and the manufacturing cost is increased; when one of the first bus and the second bus has a fault, the bus-bar reversing operation can be realized through the bus-bar connection interval connected with the first bus and the second bus, namely, the load on the fault bus is transferred to the non-fault bus. When one of the third bus bar and the fourth bus bar is in failure, the bus bar reversing operation can be realized through the bus-bar connection interval connected with the third bus bar and the fourth bus bar. However, the bus bar reversing operation is only realized by switching and using the bus bars on the same side, and the cross bus bar reversing operation of the lines cannot be realized, that is, the bus bars of the second bus bar and the third bus bar and the bus bars of the first bus bar and the fourth bus bar cannot be reversed. For example, the second bus and the third bus need to be overhauled at the same time, and in the wiring form, because the breakers of the bus-tie interval and the sectionalizing interval connected with the second bus and the third bus are equally switched off, the interval on the first bus and the fourth bus is disconnected for operation, so that the first bus and the fourth bus cannot realize bus inversion, and the limitation is large during use.
In addition to the above drawbacks, in the above dual-bus dual-segment wiring form, the second bus and the fourth bus realize bus disconnection of the second bus and the fourth bus through the segment space, and the first bus and the third bus realize bus disconnection of the first bus and the third bus through the segment space. The bus on the same side can only be disconnected at the sectional intervals, the bus cross disconnection cannot be realized, and the limitation is large during use.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a through following technical scheme realize, provide a combined electrical apparatus of double bus segmentation wiring form.
The utility model provides a double-bus sectional wiring type combined electrical apparatus, which comprises 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 with a bus-tie spacing mechanism; the bus-bar spacing mechanism comprises a first connection wire for connecting the second bus bar and the fourth bus bar, a second connection wire for connecting the first bus bar and the third bus bar, and a third connection wire for connecting the first connection wire and the second connection wire; a first isolating switch, a first grounding maintenance switch and a second isolating switch are sequentially connected to the first connection wire from near to far away from the second bus; a third isolating switch, a second grounding maintenance switch and a fourth isolating switch are sequentially connected to the second connection wire from near to far away from the first bus; and a fifth isolating switch, a third grounding maintenance switch, a first current transformer, a circuit breaker, a second current transformer, a fourth grounding maintenance switch and a sixth isolating switch are sequentially connected to the third wiring.
Preferably, a PT space corresponding to the second bus bar is connected to the first connection line between the first disconnecting switch and the second bus bar.
Preferably, a PT space corresponding to the fourth bus bar is connected to the first connection line between the second disconnecting switch and the fourth bus bar.
Preferably, a PT space corresponding to the first bus bar is connected to the second connection line between the third disconnecting switch and the first bus bar.
Preferably, a PT space corresponding to the third bus bar is connected to the second connection line between the fourth disconnecting switch and the third bus bar.
Preferably, the connection position of the third connection wire and the first connection wire is positioned between the first grounding maintenance switch and the second isolating switch; and the connecting position of the third connection wire and the second connection wire is positioned between the third isolating switch and the second grounding maintenance switch.
Preferably, the third busbar and the fourth busbar are connected by a main transformer bay and a line bay, and the first busbar and the second busbar are connected by a main transformer bay and a line bay.
The utility model has the advantages that:
1. the wiring form is only provided with 1 set of bus coupler interval, the effect of two sets of bus coupler intervals is realized, and the bus coupler intervals can also be used as the bus coupler intervals of the second bus and the third bus and the bus coupler intervals of the first bus and the fourth bus on the basis of meeting the requirement of the bus coupler intervals of the first bus and the second bus and the third bus and the fourth bus.
2. The bus-tie compartment of the present wiring form simultaneously achieves the functions of being a section compartment of the second bus bar and the fourth bus bar, being a section compartment of the first bus bar and the third bus bar, being a section compartment of the first bus bar and the fourth bus bar, and being a section compartment of the second bus bar and the third bus bar. The flexibility of power supply selection during the maintenance of any bus is provided, and multiple possibilities are provided.
3. According to the wiring form, the first bus, the second bus, the third bus and the fourth bus are connected at the bus-coupler interval at the same time, so that the bus operation of all incoming and outgoing line intervals can be realized.
4. Because this bus-tie interval has indirectly connected all 4 generating lines, can realize multiple wiring form in theory, like single busbar segmentation, cross space double bus wiring and the wiring of two busbar pair sections, the flexibility is very strong in the actual operation.
5. Adopt single bus-tie interval, all link up 4 generating lines through this interval, acted as the bus-tie interval of 4 generating lines, when needs the operation of falling the generating line (overhauls and switches the generating line), only can accomplish through this bus-tie interval of closure.
6. The circuit breakers and the current transformers are cancelled at the sectional intervals, the isolating switches are used as bus sections, 2 circuit breakers are saved, and the effect of disconnecting the buses at the sectional intervals during bus maintenance on one side of the isolating sections is met.
7. 4 PT intervals are placed in two isolated subsection intervals through changing the structure and the arrangement form, and the space of 4 interval intervals is saved.
Drawings
FIG. 1 is a schematic diagram of a conventional double busbar sectionalized wiring;
FIG. 2 is a schematic diagram of the double bus bar sectional wiring of the present invention;
FIG. 3 is a schematic diagram of the bus-tie spacing mechanism of the present invention;
FIG. 4 is a cross-sectional view of the integrated assembly of the present invention;
shown in the figure:
1. the first bus, 2, the second bus, 3, the third bus, 4, the fourth bus, 5, main transformer interval, 6, circuit interval, 7, PT interval, 8, bus-coupler interval mechanism, 9, the first isolating switch, 10, the first grounding maintenance switch, 11, the third grounding maintenance switch, 12, the fifth isolating switch, 13, the first current transformer, 14, the circuit breaker, 15, the second current transformer, 16, the third isolating switch, 17, the fourth grounding maintenance switch, 18, the sixth isolating switch, 19, the second grounding maintenance switch, 20, the fourth isolating switch, 21, the second isolating switch, 22, the first connection, 23, the third connection, 24, the second connection.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in fig. 2 and 3, the utility model discloses a first generating line 1, second generating line 2, third generating line 3 and fourth generating line 4, first generating line 1, second generating line 2, third generating line 3 and fourth generating line 4 all are connected with female spacer 8 that allies oneself with. The bus tie spacing mechanism 8 includes a first connection 22 connecting the second bus bar 2 and the fourth bus bar 4, a second connection 24 connecting the first bus bar 1 and the third bus bar 3, and a third connection 23 connecting the first connection 22 and the second connection 24.
The first disconnecting switch 9, the first grounding service switch 10 and the second disconnecting switch 21 are connected to the first connection 22 in this order from the near side to the far side from the second bus bar 2. The first connection 22 between the first disconnector 9 and the second busbar 2 is connected to the PT space 7 of the corresponding second busbar 2. A PT space 7 corresponding to the fourth busbar 4 is connected to a first connection 22 between the second disconnector 21 and the fourth busbar 4.
A third disconnector 16, a second earthing service switch 19 and a fourth disconnector 20 are connected in series from near to far from the first busbar 1 in a second connection 24. A PT compartment 7 corresponding to the first busbar 1 is connected to a second connection 24 between the third disconnector 16 and the first busbar 1. A PT compartment 7 corresponding to the third busbar 3 is connected to a second connection 24 between the fourth disconnector 20 and the third busbar 3.
The fifth disconnecting switch 12, the third grounding inspection switch 11, the first current transformer 13, the circuit breaker 14, the second current transformer 15, the fourth grounding inspection switch 17 and the sixth disconnecting switch 18 are connected to the third connection wire 23 in sequence. The connection position of the third connection 23 and the first connection 22 is located between the first grounding service switch 10 and the second disconnecting switch 21. The connection position of the third connection 23 and the second connection 24 is between the third disconnector 16 and the second earthing service switch 19.
In this embodiment, the PT interval is an existing structure, and the detailed structure of the PT interval is not described again.
In the present exemplary embodiment, the third busbar 3 and the fourth busbar 4 are connected via a main bay 5 and a line bay 6, and the first busbar 1 and the second busbar 2 are connected via a main bay 5 and a line bay 6. The main transformer interval 5 and the line interval 6 are both of the conventional structure.
The present application only occupies 3 interval bays by performing structural integration on PT intervals, segment intervals and bus tie intervals, see in particular fig. 4. In the conventional wiring form, four PT intervals corresponding to four buses need to occupy 4 interval positions, bus-coupler intervals occupy 1 interval position, and two sets of subsection intervals occupy 2 interval positions, namely the conventional wiring form needs to occupy 7 interval positions. Therefore, the space size of the combined electrical appliance is greatly reduced, and the advantages are very obvious.
The utility model discloses a when most generating line overhauls, circuit interval 6 and main transformer interval 5 all can normally be put into operation, when first generating line 1, second generating line 2, third generating line 3, fourth generating line 4, when wherein 1 overhauls, all can realize through operation mother ally oneself with 8 spacer mechanisms that the maintenance generating line withdraws from operation and circuit interval 6 and main transformer interval 5 normal operating. If the first bus 1 is overhauled, the fourth isolating switch 20 is opened to disconnect the first bus 1 and the third bus 3 in the sectional interval, 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, the third isolating switch 16 is closed, all the isolating switches of the line interval 6 and the main transformer interval 5 on the first bus 1 are disconnected, the load of the first bus 1 is totally poured to the second bus 2, and the overhauling bus quitting operation and the normal operation of the line interval 6 and the main transformer interval 5 are realized. And the maintenance of the rest buses can be realized by the method. For another example, the second bus bar 2 and the third bus bar 3 need to be overhauled at the same time, and since the bus coupling spacing mechanism 8 is connected with the first bus bar 1, the second bus bar 2, the third bus bar 3 and the fourth bus bar 4 at the same time, the first bus bar 1 and the fourth bus bar 4 can be connected through the bus coupling spacing mechanism 8, so that all incoming and outgoing line intervals can be operated by the same bus bar (connected through the first bus bar 1 and the fourth bus bar 4). Similarly, when the first bus bar 1 and the fourth bus bar 4 are overhauled simultaneously, all the incoming and outgoing line intervals can be operated by a common bus bar (connected by the second bus bar 2 and the third bus bar 3).
The operation method of the double-bus sectional wiring type combined electrical apparatus comprises the following steps:
firstly, a first isolating switch 9 is closed, a fifth isolating switch 12 is closed, a breaker 14 is closed, a sixth isolating switch 18 is closed, a third isolating switch 16 is closed, a second isolating switch 21 is opened, a fourth isolating switch 20 is opened, and a bus tie spacing mechanism 8 is used as a bus tie spacing of a first bus 1 and a second bus 2;
closing a second isolating switch 21, closing a fifth isolating switch 12, closing a breaker 14, closing a sixth isolating switch 18, closing a fourth isolating switch 20, opening a first isolating switch 9, opening a third isolating switch 16, and taking a bus-tie spacing mechanism 8 as a bus-tie spacing of a third bus 3 and a fourth bus 4;
thirdly, 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 is used as a bus tie spacing of the second bus 2 and the third bus 3;
closing a second isolating switch 21, closing a fifth isolating switch 12, closing a breaker 14, closing a sixth isolating switch 18, closing a third isolating switch 16, opening a first isolating switch 9, opening a fourth isolating switch 20 and taking a bus-tie spacing mechanism 8 as a bus-tie spacing of a fourth bus 4 and a first bus 1;
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-tie spacing mechanism 8 is used as a sectional spacing of the second bus 2 and the fourth bus 4;
sixthly, 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-tie spacing mechanism 8 is used as a sectional spacing of the first bus 1 and the third bus 3;
the first isolating switch 9 is closed, the fifth isolating switch 12 is closed, the 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-bar spacing mechanism 8 is used as the sectional spacing of the second bus bar 2 and the third bus bar 3;
closing the second isolating switch 21, closing the fifth isolating switch 12, closing the circuit breaker 14, closing the sixth isolating switch 18, closing the third isolating switch 16, opening the first isolating switch 9, opening the fourth isolating switch 20, and taking the bus tie spacing mechanism 8 as the section spacing of the fourth bus 4 and the first bus 1.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims (7)

1. A combined electrical apparatus of double bus bar sectional connection form is characterized in that: the bus bar comprises a first bus bar, a second bus bar, a third bus bar and a fourth bus bar, wherein the first bus bar, the second bus bar, the third bus bar and the fourth bus bar are all connected with a bus-bar spacing mechanism; the bus-bar spacing mechanism comprises a first connection wire for connecting the second bus bar and the fourth bus bar, a second connection wire for connecting the first bus bar and the third bus bar, and a third connection wire for connecting the first connection wire and the second connection wire; a first isolating switch, a first grounding maintenance switch and a second isolating switch are sequentially connected to the first connection wire from near to far away from the second bus; a third isolating switch, a second grounding maintenance switch and a fourth isolating switch are sequentially connected to the second connection wire from near to far away from the first bus; and a fifth isolating switch, a third grounding maintenance switch, a first current transformer, a circuit breaker, a second current transformer, a fourth grounding maintenance switch and a sixth isolating switch are sequentially connected to the third wiring.
2. The double busbar sectionalized wiring type combined electrical apparatus according to claim 1, wherein: and a first connection wire between the first isolating switch and the second bus is connected with a PT interval corresponding to the second bus.
3. The double busbar sectionalized wiring type combined electrical apparatus according to claim 2, wherein: and a first connection wire between the second isolating switch and the fourth bus is connected with a PT interval corresponding to the fourth bus.
4. A double busbar sectionalized wiring type combined electrical apparatus according to claim 3, wherein: and a second connection wire between the third isolating switch and the first bus is connected with a PT interval corresponding to the first bus.
5. The double busbar sectionalized wiring type combined electrical apparatus according to claim 4, wherein: and a second connection wire between the fourth isolating switch and the third bus is connected with a PT interval corresponding to the third bus.
6. The double busbar sectionalized wiring type combined electrical apparatus according to claim 1, wherein: the connecting position of the third connecting wire and the first connecting wire is positioned between the first grounding maintenance switch and the second isolating switch; and the connecting position of the third connection wire and the second connection wire is positioned between the third isolating switch and the second grounding maintenance switch.
7. The double busbar sectionalized wiring type combined electrical apparatus according to claim 1, wherein: the third bus and the fourth bus are connected through a main transformer interval and a line interval, and the first bus and the second bus are connected through the main transformer interval and the line interval.
CN202120125447.7U 2021-01-18 2021-01-18 Combined electrical apparatus of double-bus sectional wiring form Active CN214069584U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120125447.7U CN214069584U (en) 2021-01-18 2021-01-18 Combined electrical apparatus of double-bus sectional wiring form

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120125447.7U CN214069584U (en) 2021-01-18 2021-01-18 Combined electrical apparatus of double-bus sectional wiring form

Publications (1)

Publication Number Publication Date
CN214069584U true CN214069584U (en) 2021-08-27

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Application Number Title Priority Date Filing Date
CN202120125447.7U Active CN214069584U (en) 2021-01-18 2021-01-18 Combined electrical apparatus of double-bus sectional wiring form

Country Status (1)

Country Link
CN (1) CN214069584U (en)

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