CN206135210U - Two bus section's novel main wiring - Google Patents

Abstract

The utility model provides a new type of main wiring with double bus bars segmented. By setting at least one power electronic transformer, comprehensive control functions such as two-way on-demand deployment of power flow, active and reactive composite support, power quality isolation and control, and fault current limiting are realized. . A breaking controller is set between two busbars and between adjacent subsection buses of each busbar. When the busbar flexible controller is used for the breaking controller, it can not only control the The on-off status between the adjacent sub-section buses of the busbar can realize the flexible distribution of the power flow. When the breaking device connected with the transformer adopts the power electronic quick breaking device, the system fault can be removed quickly. Compared with the main wiring of the traditional substation double-bus section, the utility model integrates power electronic equipment on the basis of the traditional main wiring, has the advantages of flexible controllability, rapid response, etc., and realizes a series of comprehensive control functions.

Description

A New Type of Main Wiring with Double Busbar Segmentation

technical field

The utility model relates to the technical field of electric power, in particular to a novel main connection with double bus bars segmented.

Background technique

With the accelerated pace of smart grid construction, substations are gradually changing from a single voltage conversion node to a grid regulation node. In the future, substations need to complete comprehensive control functions such as flexible distribution of grid power flow, rapid control and protection.

In the double-bus section main wiring structure of traditional substations, traditional primary equipment, such as ferromagnetic transformers and mechanical circuit breakers, are usually used. First of all, ferromagnetic transformers are generally used in the main wiring of existing double busbar sections. This transformer can only realize voltage transformation, but cannot realize a series of comprehensive controls such as flexible power flow control, active and reactive power support, power quality control, and fault current limiting. function; secondly, in the traditional main wiring mode, the bus tie switch between two busbars and between the adjacent section busbars of each busbar only has two states of "opening and closing", which cannot realize the power flow between two busbars and The flexible allocation of adjacent sub-sections of each bus; thirdly, the opening delay of mechanical circuit breakers is long, which cannot meet the actual needs of future substations for rapid fault removal.

Therefore, in order to meet the functional requirements of the future smart grid for substations, it is necessary to set up a new main wiring form.

Utility model content

The first technical problem to be solved by the utility model is to overcome the defect that the traditional transformer in the prior art cannot realize comprehensive control functions such as flexible power flow control;

In addition, the second technical problem to be solved by the utility model lies in the defect that the bus tie switch in the prior art cannot realize the flexible distribution of power flow between two bus bars and between the adjacent section bus bars of each bus bar;

In addition, the third technical problem to be solved by the utility model lies in the defect that the traditional circuit breaker in the prior art cannot quickly remove the fault.

In view of this, the utility model provides a new type of main wiring with double bus bars segmented, including a first bus bar and a second bus bar, the second bus bar includes a plurality of segmented bus bars, the first bus bar and the second bus bar Each segmented bus of the bus is connected to at least one outgoing line, including at least:

A first transformer, the first transformer is a power electronic transformer, the first transformer is connected to one end of the first breaking device, and the other end of the first breaking device is connected to the first bus through a first isolating switch Connected, connected to a segmented bus in the second bus through a second isolating switch;

The two segmented buses at both ends of the second bus are respectively connected to the first bus through a first breaking controller;

A second breaking controller for connecting adjacent segmented buses is arranged between adjacent segmented buses of the second busbar.

Preferably, it also includes one or more second transformers, the second transformer is connected to one end of the second breaking device, and the other end of the second breaking device is connected to the first bus through a third disconnector . Connect to another section bus of the second bus through the fourth disconnector.

Preferably, the second transformer is a conventional transformer or a power electronic transformer.

Preferably, the first busbar includes a plurality of segmented busbars, and the number of segmented busbars of the first busbar is the same as the number of segmented busbars of the second busbar, and each segmented busbar of the first busbar is respectively connected to At least one outgoing line, the other end of the first breaking device is connected to a segmented bus in the first bus through the first isolating switch, and connected to the corresponding segmented bus in the second bus through the second isolating switch connect.

Preferably, a third breaking controller for connecting the first bus and the second bus is provided between the section bus of the first bus and the corresponding section bus of the second bus.

Preferably, a fourth breaking controller for connecting adjacent segmented buses is provided between adjacent segmented buses of the first busbar.

Preferably, part or all of the first breaking device and the second breaking device use power electronic quick disconnecting devices or conventional circuit breakers.

Preferably, some or all of the first breaking controller, the second breaking controller, the third breaking controller and the fourth breaking controller use power electronic quick breaking devices or conventional circuit breakers.

Preferably, the first breaking controller and the third breaking controller use a bus-tie flexible controller, and the bus-tie flexible controller is used to adjust the power flow between the first bus and the second bus.

Preferably, the second breaking controller and the fourth breaking controller use a bus-tie flexible controller, and the bus-tie flexible controller is used to adjust the power flow between two adjacent bus sections.

The technical scheme of the utility model has the following advantages:

1. This utility model provides a new type of main wiring with double bus bars segmented. By setting at least one power electronic transformer, it can realize two-way on-demand deployment of power flow, composite support of active and reactive power, isolation and control of power quality, fault current limiting, etc. Comprehensive control functions. Compared with the main wiring form of the traditional substation double-bus section, the utility model integrates power electronic equipment on the basis of the traditional main wiring form, has the advantages of flexible controllability, rapid response, etc., and realizes a series of comprehensive control functions.

2. The utility model provides a new type of main wiring with double bus bars segmented, and a break controller is set between the two bus bars and between the adjacent segmented bus bars of each bus bar. When the break controller uses a bus-connected flexible controller, it can not only control the on-off state between two buses and the adjacent section buses of each bus, but also realize the power flow between two buses. And the flexible allocation between the adjacent segment busbars of each busbar.

3. The utility model provides a new type of main wiring with double busbar segments. The first transformer is connected to the first breaking device, and the second transformer is connected to the second breaking device. When the breaking device adopts When the power electronic quick disconnect device is used, the quick removal of system faults can be realized.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Figure 1 is a schematic diagram of a new type of main wiring of a double bus section;

Figure 2 is a schematic diagram of a new type of main wiring connecting two transformers with double busbar segments;

Fig. 3 is a schematic diagram of a new type of main wiring connecting two transformers with double busbars and double segments.

Wherein, reference sign is:

11-the first transformer, 12-the first breaking device, 13-the first isolating switch, 14-the second isolating switch;

21-the second transformer, 22-the second breaking device, 23-the third isolating switch, 24-the fourth isolating switch;

15, 17, 25, 27- first bus isolating switch;

16, 18, 26, 28-second bus disconnector;

3- the first busbar;

6-the first section of the first busbar, 7-the second section of the first busbar;

4- the first section of the second busbar, 5- the second section of the second busbar;

34, 35-the first breaking controller;

45 - the second breaking controller;

46, 57-the third breaking controller;

36 - Fourth disconnect controller.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, or it can be the internal communication of two components, it can be wireless connection, or it can be wired connection. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

This embodiment provides a new type of main wiring with double bus sections, as shown in Figure 1, including the first section 4 of the first bus 3 and the second bus and the second section 5 of the second bus, the first bus 3 is connected 7 outgoing lines, the first section 4 of the second busbar and the second section 5 of the second busbar are respectively connected to 4 outgoing lines. The first transformer 11 is a power electronic transformer, the first transformer 11 is connected to one end of the first breaking device 12, the other end of the first breaking device 12 is connected to the first bus 3 through the first isolating switch 13, and the second isolating A switch 14 is connected to the first section 4 of the second busbar.

First bus isolating switches 15, 17, 25 and 27 are respectively arranged between the first bus 3 and its corresponding outgoing lines. Second bus isolating switches 16 and 18 are respectively arranged between the first section 4 of the second bus and its corresponding outlets, and second bus isolating switches are respectively arranged between the second section 5 of the second bus and its corresponding outlets 26 and 28.

One end of the first bus isolating switch 15 and the second bus isolating switch 16 are respectively connected to the first section 4 of the first bus 3 and the second bus, and the other ends are connected in parallel to load equipment, power supply or energy storage equipment; One end of the first bus isolating switch 17 and the second bus isolating switch 18 are respectively connected to the first section 4 of the first bus 3 and the second bus, and the other ends are connected in parallel to load equipment, power supply or energy storage equipment. One end of the first bus isolating switch 25 and the second bus isolating switch 26 are respectively connected to the first bus 3 and the second section 5 of the second bus, and after the other ends are connected in parallel, they are connected to load equipment, power supply or energy storage equipment; One end of the first bus isolating switch 27 and the second bus isolating switch 28 are respectively connected to the first bus 3 and the second section 5 of the second bus, and the other ends are connected in parallel to load equipment, power supply or energy storage equipment. Furthermore, more outgoing lines can be set for each segmented bus to connect load equipment, power supply or energy storage equipment.

The first transformer 11 adopts a power electronic transformer. In addition to realizing the traditional voltage conversion function, it can also realize comprehensive control functions such as two-way on-demand deployment of power flow, composite support of active and reactive power, isolation and control of power quality, and fault current limiting.

The first breaking device 12 is used together with the first isolating switch 13 and the second isolating switch 14 to control whether the first transformer 11 is connected to the first section 4 of the first bus 3 and the second bus. For example, when the first breaking device 12 is turned on and the first isolating switch 13 is closed, the first transformer 11 is connected to the first bus bar 3 to transmit power to the first bus bar 3, and is implemented as a load for other outgoing lines of the first bus bar 3 power supply to the equipment; or, power is supplied to the first transformer 11 through the first isolating switch 13 and the first breaking device 12 from the power supply or the energy storage equipment of other outgoing lines of the first bus bar 3 . When the first breaking device 12 is disconnected, the first transformer 11 stops supplying power to the first section 4 of the first bus 3 and the second bus; or, the first section 4 of the first bus 3 and the second bus stops supplying power to the first section 4 of the second bus. A transformer 11 supplies power. In order to realize the two-way flow of the trend.

The two segmented buses at both ends of the second bus, namely the first section 4 of the second bus and the second section 5 of the second bus, are connected to the first bus 3 through the first breaking controllers 34 and 35 respectively. When the first breaking controllers 34 and 35 use power electronic quick disconnecting devices or conventional circuit breakers, it is possible to control the first busbar 3 and the first section 4 of the second busbar, and the second section 5 of the second busbar. on-off state. For example, when the first breaking controller 34 is disconnected, the first section 4 of the first bus 3 and the second bus run separately; when the first breaking controller 34 is closed, the first bus 3 and the second bus The first segment 4 runs in parallel. When the power electronic quick disconnect device is used, the quick removal of system faults can be realized.

Further, the first breaking controllers 34 and 35 can also use bus-tie flexible controllers. For example, when the first breaking controller 34 uses a bus-connected flexible controller, it can not only control the on-off state between the first bus bar 3 and the first section 4 of the second bus bar, but also realize the power flow in the first bus bar 3 and flexible allocation between the first section 4 of the second busbar.

Between the adjacent section busbars of the second busbar, that is, between the first section 4 of the second busbar and the second section 5 of the second busbar, a second breaking control for connecting adjacent section busbars is provided device 45. When the second breaking controller 45 uses a power electronic quick breaking device or a conventional circuit breaker, it can control the on-off state between the first section 4 of the second busbar and the second section 5 of the second busbar. For example, when the second breaking controller 45 was disconnected, the first section 4 of the second busbar and the second section 5 of the second busbar operated in parallel; when the second breaking controller 45 was closed, the second section 5 of the second busbar The first section 4 runs in parallel with the second section 5 of the second busbar. When the power electronic quick disconnect device is used, the quick removal of system faults can be realized.

Further, the second breaking controller 45 can also use a bus-tie flexible controller. When the flexible controller of the bus is used, it can not only control the on-off state between the first section 4 of the second busbar and the second section 5 of the second busbar, but also realize the power flow between the first section 4 of the second busbar and the second section 5 of the second busbar. Flexible allocation between the second section 5 of the second busbar.

As another implementation manner, on the basis of setting one transformer above, more transformers may be further extended. For example, the new main connection of the double bus section also includes one or more second transformers 21 , as shown in FIG. 2 . The second transformer 21 is connected to one end of the second breaking device 22, the other end of the second breaking device 22 is connected to the first bus 3 through the third disconnector 23, and connected to the second bus 3 through the fourth disconnector 24. Segment 5 is connected.

The second transformer 21 is a conventional transformer or a power electronic transformer. When a power electronic transformer is used, in addition to the traditional voltage conversion function, it can also realize comprehensive control functions such as two-way on-demand deployment of power flow, active and reactive composite support, power quality isolation and control, and fault current limiting.

The second breaking device 22 is used together with the third isolating switch 23 and the fourth isolating switch 24 to control whether the second transformer 21 is connected to the first bus 3 and the second section 5 of the second bus. For example, when the second breaking device 22 is turned on and the third isolating switch 23 is closed, the second transformer 21 is connected to the first bus bar 3 to transmit power to the first bus bar 3, which is implemented as a load for other outgoing lines of the first bus bar 3 or, the second transformer 21 is powered by the power supply or the energy storage equipment of other outlets of the first bus bar 3 via the third isolating switch 23 and the second breaking device 22 . When the second breaking device 22 is disconnected, the second transformer 21 stops supplying power to the first bus 3 and the second section 5 of the second bus; or, the first bus 3 and the second section 5 of the second bus stop supplying power to the first bus 3 and the second section 5 of the second bus. The second transformer 21 supplies power. In order to realize the two-way flow of the trend.

The first breaking device 12 and the second breaking device 22 may partly or entirely use power electronic quick breaking devices or conventional circuit breakers. When the power electronic quick disconnect device is used, the quick removal of system faults can be realized.

As a specific implementation manner, the first busbar may also include multiple segmented busbars, as shown in FIG. 3 . The first section 6 of the first busbar and the second section 7 of the first busbar are respectively connected to at least one outgoing line, and the other end of the first breaking device 12 is connected to the first section 6 of the first busbar through the first isolating switch 13, through The second isolating switch 14 is connected to the first section 4 of the second busbar. A third breaking controller for connecting the first bus and the second bus is arranged between the section bus of the first bus and the corresponding section of the second bus. That is, between the first section 6 of the first busbar and the first section 4 of the second busbar, between the second section 7 of the first busbar and the second section 5 of the second busbar, there are respectively provided for connecting the first busbar and the second section 5 of the second busbar. Third breaking controllers 46 and 57 for the second busbar. Between the adjacent section buses of the first busbar, that is, between the first section 6 of the first busbar and the second section 7 of the first busbar, a fourth breaking controller for connecting adjacent section busbars is arranged 36.

When the third breaking controller uses a power electronic quick breaking device or a conventional circuit breaker, it can control the on-off state between the segmented bus bars of the first bus bar and the corresponding segmented bus bars of the second bus bar. When the power electronic quick disconnect device is used, the quick removal of system faults can be realized. Further, the third breaking controller can also use a bus-tie flexible controller. When using the flexible controller of the bus tie, it can not only control the on-off state between the segment bus of the first bus and the corresponding segment bus of the second bus, but also realize the power flow between the segment bus of the first bus and the second bus. Flexible allocation between the corresponding section busbars of the busbar.

Between the adjacent subsection buses of the first busbar, a fourth breaking controller for connecting adjacent subsection busbars is arranged. When the fourth breaking controller uses a power electronic quick breaking device or a conventional circuit breaker, it can control the on-off state between the adjacent section bus bars of the first bus bar. When the power electronic quick disconnect device is used, the quick removal of system faults can be realized. Further, the fourth breaking controller can also use a bus-tie flexible controller. When using the flexible controller of the bus tie, it can not only control the on-off state between the adjacent sub-buses of the first bus, but also realize the flexible distribution of the power flow between the adjacent sub-buses of the first bus.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. the new main electrical scheme that a kind of double-bus is segmented, including the first bus and the second bus, second bus includes a plurality of Every sectionalized busbar of sectionalized busbar, first bus and second bus is respectively connecting to a few outlet, its feature It is at least to include：

First transformator, first transformator is electric power electric transformer, first transformator and the first breaking device One end connects, and the other end of first breaking device is connected with first bus by the first disconnecting switch, by second Disconnecting switch is connected with a sectionalized busbar in second bus；

Two sectionalized busbars at the second bus two ends, are cut-off controller by first respectively and are connected with first bus；

For getting in touch with adjacent sectional bus second is provided between the adjacent sectional bus of second bus and cut-offs control Device.

2. main electrical scheme according to claim 1, it is characterised in that also including one or more the second transformators, described Two transformators are connected with one end of the second breaking device, and the other end of second breaking device passes through the 3rd disconnecting switch and institute State the connection of the first bus, be connected with another article of sectionalized busbar of second bus by the 4th disconnecting switch.

3. main electrical scheme according to claim 2, it is characterised in that second transformator is conventional transformer or electric power electricity Sub- transformator.

4. main electrical scheme according to claim 1, it is characterised in that first bus includes a plurality of sectionalized busbar, and The bar number of one bus section bus is identical with the bar number of the second bus section bus, every sectionalized busbar point of first bus Outlet do not connected at least one, the other end of first breaking device is by the first disconnecting switch and first bus One sectionalized busbar is connected, is connected with the corresponding segment bus in second bus by the second disconnecting switch.

5. main electrical scheme according to claim 4, it is characterised in that in the sectionalized busbar and described second of first bus Between the corresponding segment bus of bus, it is provided with for getting in touch with the first bus and the second bus the 3rd and cut-offs controller.

6. main electrical scheme according to claim 4, it is characterised in that set between the adjacent sectional bus of first bus It is equipped with for getting in touch with adjacent sectional bus the 4th and cut-offs controller.

7. the main electrical scheme according to any one of claim 1-6, it is characterised in that first breaking device and second is opened Disconnected device partly or entirely uses power electronics rapid on-off apparatus or regular circuit breakers.

8. the main electrical scheme according to any one of claim 1-6, it is characterised in that described first cut-off controller, second Cut-off controller, the 3rd cut-off controller, the 4th cut-off controller partly or entirely use power electronics rapid on-off apparatus or Regular circuit breakers.

9. the main electrical scheme according to any one of claim 1-6, it is characterised in that described first cut-offs controller and the 3rd Cut-offfing controller uses mother flexible controller, the mother flexible controller to be used to adjust between the first bus and the second bus Trend.

10. the main electrical scheme according to any one of claim 1-6, it is characterised in that described second cut-offs controller and Four cut-off controller uses mother flexible controller, the mother flexible controller to be used to adjust the tide between adjacent two sections of buses Stream.