CN216355978U - Multi-power supply conversion system - Google Patents

Abstract

The utility model discloses a multi-power conversion system, which comprises: the system comprises a first commercial power circuit breaker, a second commercial power circuit breaker, a first power generation circuit breaker, a second power generation circuit breaker, a junction circuit breaker, a first transformer, a second transformer, a first power generator, a second power generator, a first load and a second load; the first transformer is connected with a first load through a first commercial power breaker, the second transformer is connected with a second load through a second commercial power breaker, the first generator is connected with the first load through a first power generation breaker, the second transformer is connected with the second load through a second power generation breaker, and the first load is connected with the second load through a coupling breaker. The multi-power-supply conversion system can keep power supply for loads of each low-voltage power distribution system by using fewer circuit breakers, is simple and convenient to install, and reduces the cost.

Description

Multi-power supply conversion system

Technical Field

The utility model relates to the technical field of power supply control systems, in particular to a multi-power supply conversion system.

Background

In order to ensure uninterrupted power supply of the power system, a multi-power conversion system is required. At present, a three-in-two power conversion system with double-transformer commercial power and a commercial power supply mutually serving as a standby is realized by adopting three circuit breakers, and on the basis, when a generator is additionally arranged to maintain power supply for loads of each low-voltage distribution system, multiple circuit breakers are required to be additionally arranged, so that the installation is inconvenient and the cost is high.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a multi-power-supply conversion system which can keep power supply for loads of each low-voltage distribution system by using fewer circuit breakers, is simple and convenient to install and reduces the cost.

An embodiment of the present invention provides a multi-power conversion system, including: the system comprises a first commercial power circuit breaker, a second commercial power circuit breaker, a first power generation circuit breaker, a second power generation circuit breaker, a junction circuit breaker, a first transformer, a second transformer, a first power generator, a second power generator, a first load and a second load; the first transformer is connected with the first load through the first commercial power circuit breaker, the second transformer is connected with the second load through the second commercial power circuit breaker, the first generator is connected with the first load through the first power circuit breaker, the second transformer is connected with the second load through the second power circuit breaker, and the first load is connected with the second load through the connecting circuit breaker.

The multi-power-supply conversion system provided by the embodiment of the utility model has at least the following beneficial effects: the multi-power-supply conversion system can realize that a plurality of power supplies are the power supply conversion system of the standby power supply through the first commercial power circuit breaker, the second commercial power circuit breaker, the first power circuit breaker, the second power circuit breaker and the connecting circuit breaker, reduces the number of the circuit breakers, is convenient to install, reduces the circuit cost, can switch different power supplies under different power failure conditions to continuously supply power for the first load and the second load, and improves the operation and maintenance efficiency.

According to some embodiments of the utility model, the system further comprises a first interlock device for preventing the first mains circuit breaker and the first power generation circuit breaker from being closed simultaneously, the first interlock device being connected between the first mains circuit breaker and the first power generation circuit breaker to prevent the first transformer and the first power generator from supplying power to the first load simultaneously.

According to some embodiments of the utility model, the system further comprises a second interlock device for preventing the second mains breaker and the second power generation breaker from being closed simultaneously, the second interlock device being connected between the second mains breaker and the second power generation breaker, avoiding a second transformer and a second generator from supplying power to a second load simultaneously.

According to some embodiments of the utility model, the system further comprises a third interlock device for preventing the simultaneous closing of the junction breaker, the first generation breaker and the second generation breaker, the junction breaker being connected to the first generation breaker and the second generation breaker respectively through the third interlock device, avoiding that the first generator and the second generator supply power to the first load and the second load simultaneously in case of a connection of the first load and the second load.

According to some embodiments of the present invention, the third interlocking device includes a first contact, a second contact, a third contact and a fourth contact, the first generating breaker is connected to the first contact, the second generating breaker is connected to the fourth contact, the connecting breakers are respectively connected to the second contact and the third contact, the first contact corresponds to the second contact, and the third contact corresponds to the fourth contact, so that the control is convenient and the operation and maintenance efficiency is improved.

According to some embodiments of the utility model, the power supply further comprises a first driver, and when the first transformer fails, the first driver is respectively connected with the second contact, the first commercial power circuit breaker and the first power generation circuit breaker, so as to drive the second contact and the first commercial power circuit breaker to be opened and drive the first power generation circuit breaker to be closed, thereby realizing power supply conversion and improving operation and maintenance efficiency.

According to some embodiments of the utility model, the power supply further comprises a second driver, and when the second transformer fails, the second driver is respectively connected with the third contact, the second commercial power circuit breaker and the second power generation circuit breaker, so as to drive the third contact and the second commercial power circuit breaker to be opened and drive the second power generation circuit breaker to be closed, thereby realizing power supply conversion and improving operation and maintenance efficiency.

According to some embodiments of the present invention, the power supply system further comprises a third driver, and in a case that both the first transformer and the first generator have a fault, the third driver is connected to the first contact, the fourth contact, the first commercial circuit breaker, the second commercial circuit breaker and the junction circuit breaker, so as to drive the first contact, the fourth contact and the first commercial circuit breaker to be opened, and drive the second commercial circuit breaker and the junction circuit breaker to be closed, thereby implementing multi-power conversion and maintaining power supply of the first load and the second load.

According to some embodiments of the present invention, the power supply system further comprises a fourth driver, and in a case that both the second transformer and the second generator have a fault, the fourth driver is connected to the first contact, the fourth contact, the first commercial circuit breaker, the second commercial circuit breaker and the junction circuit breaker, so as to drive the first contact, the fourth contact and the second commercial circuit breaker to be opened, and drive the first commercial circuit breaker and the junction circuit breaker to be closed, thereby implementing multi-power conversion and maintaining power supply of the first load and the second load.

According to some embodiments of the utility model, the system further comprises a fourth interlock device for preventing the joint circuit breaker, the first mains circuit breaker and the second mains circuit breaker from closing simultaneously, the joint circuit breaker being connected to the first mains circuit breaker and the second mains circuit breaker respectively through the fourth interlock device, avoiding that the first transformer and the second transformer supply power to the first load and the second load simultaneously in case of connection of the first load and the second load.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of the structural connections of a multiple power conversion system according to some embodiments of the utility model;

FIG. 2 is a schematic diagram of the structural connections of a multiple power conversion system according to further embodiments of the present invention;

fig. 3 is a schematic structural connection diagram of a multi-power conversion system according to another embodiment of the present invention.

Reference numerals: a multi power conversion system 100, a first mains circuit breaker 110, a second mains circuit breaker 120, a first generation circuit breaker 130, a second generation circuit breaker 140, a junction circuit breaker 150, a first transformer 160, a second transformer 170, a first generator 180, a second generator 190, a first load 200, a second load 210, a first interlock device 220, a second interlock device 230, a third interlock device 240, a first contact 241, a second contact 242, a third contact 243, a fourth contact 244.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The utility model provides a multi-power-supply conversion system, wherein a first transformer is connected with a first load through a first commercial power circuit breaker, a second transformer is connected with a second load through a second commercial power circuit breaker, a first generator is connected with the first load through a first power circuit breaker, the second transformer is connected with the second load through a second power circuit breaker, and the first load is connected with the second load through a connecting circuit breaker, so that the power conversion system with a plurality of power supplies as standby power supplies is realized, the power supply for the loads of various low-voltage power distribution systems can be kept by using fewer circuit breakers, the installation is simple and convenient, and the cost is reduced.

The embodiments of the present invention will be further explained with reference to the drawings.

The present invention provides a multiple power conversion system 100.

In connection with fig. 1, it can be understood that the multiple power supply conversion system 100 includes a first utility breaker 110, a second utility breaker 120, a first generation breaker 130, a second generation breaker 140, a junction breaker 150, a first transformer 160, a second transformer 170, a first generator 180, a second generator 190, a first load 200, and a second load 210. The first transformer 160 is connected to the first load 200 through the first utility power breaker 110, the second transformer 170 is connected to the second load 210 through the second utility power breaker 120, the first generator 180 is connected to the first load 200 through the first generation breaker 130, the second transformer 170 is connected to the second load 210 through the second generation breaker 140, and the first load 200 is connected to the second load 210 through the junction breaker 150. Therefore, the multi-power conversion system 100 can realize a power conversion system in which a plurality of power supplies are mutually standby power supplies through the first utility power circuit breaker 110, the second utility power circuit breaker 120, the first power generation circuit breaker 130, the second power generation circuit breaker 140 and the coupling circuit breaker 150, reduce the number of circuit breakers, facilitate installation, reduce circuit cost, and can switch different power supplies to continuously supply power to the first load 200 and the second load 210 under different power failure conditions, thereby improving operation and maintenance efficiency. For example, when the first transformer 160 is failed, the first utility breaker 110 is opened, the first generator breaker 130 is closed, and the first generator 180 is continuously powered, so that the multi power conversion system 100 can supply power to the first load 200 through the first generator breaker 130 by using the first generator 180, and maintain the normal operation of the first load 200. For another example, when the first transformer 160 is recovered to be normal and can supply power to the first load 200, the first generator circuit breaker is opened, the first generator 180 stops working, and the first utility power circuit breaker 110 is closed, so that the multi-power-supply conversion system 100 can continue to supply power to the first load 200 through the first utility power circuit breaker 110 by using the first transformer 160. The second transformer 170 is connected to the second load 210 through the second commercial power breaker 120, and the second generator 190 is connected to the second load 210 through the second power breaker 140, so that the power supply of the second load 210 can be adjusted by adjusting the on/off state of the second commercial power breaker 120 or the second power breaker 140. In addition, the junction breakers 150 are connected to the first and second loads 200 and 210, respectively, so that power can be independently and simultaneously supplied to the first and second loads 200 and 210 through one of the first transformer 160, the first generator 180, the second transformer 170, or the second generator 190. For example, when the required voltage, current and power of the first load 200 are small and the required voltage, current and power of the second load 210 are small, the first mains breaker 110 may be opened and the junction breaker 150 and the second mains breaker 120 are closed, so that the multi power supply conversion system 100 can simultaneously supply power to the first load 200 and the second load 210 through the second transformer 170. Therefore, the first load 200 is connected in parallel through the first utility breaker 110 and the first power generation breaker 130, the second load 210 is connected in parallel through the second utility breaker 120 and the second power generation breaker 140, and the first load 200 and the second load 210 are connected through the junction breaker 150, so that the switching of the power supply of the first load 200 and the second load 210 can be realized through a small number of breakers, the installation is simple and convenient, and the cost is saved. And the first utility power circuit breaker 110, the second utility power circuit breaker 120, the first power generation circuit breaker 130, the second power generation circuit breaker 140 and the junction circuit breaker 150 can maintain the power supply of the first load 200 and the second load 210, shorten the time for the first load 200 and the second load 210 to recover the power supply, reduce the power failure time of the first load 200 and the second load 210, and improve the operation and maintenance efficiency of the power system. Meanwhile, under the condition that the voltage, current and power required by the first load 200 and the second load 210 are low, the first load 200 and the second load 210 can be simultaneously supplied with power through one transformer or one generator, so that the power supply system is suitable for various use scenes and is convenient for users to use.

With reference to fig. 2, it can be understood that the multi-power conversion system 100 further includes a first interlock device 220, the first interlock device 220 is connected between the first mains circuit breaker 110 and the first power generation circuit breaker 130, the first interlock device 220 may be a mechanical interlock device, for example, the first interlock device 220 is a steel cable interlock device, the first interlock device 220 can limit the switches of the first mains circuit breaker 110 and the first power generation circuit breaker 130, so as to prevent the first mains circuit breaker 110 and the first power generation circuit breaker 130 from being closed at the same time, which results in that the first transformer 160 and the first power generation motor 180 supply power to the first load 200 at the same time, the power supply is short-circuited, the operation of the first load 200 is affected, and even the multi-power conversion system 100 is damaged, thereby improving safety and stability.

It can be understood that the multi power conversion system 100 is further provided with a second interlock device 230, the second mains circuit breaker 120 is connected with the second power generation circuit breaker 140 through the second interlock device 230, the second interlock device 230 may be a mechanical interlock device, and the second mains circuit breaker 120 is disposed at one side of the second power generation circuit breaker 140, so that the second interlock device 230 may limit the second mains circuit breaker 120 and the second power generation circuit breaker 140 from being closed at the same time, which results in the second transformer 170 and the second power generator 190 supplying power to the second load 210 at the same time, and a power short occurs, which affects the power supply of the multi power conversion system 100, even damages the multi power conversion system 100, and improves safety and stability.

In connection with fig. 3, it can be understood that the multiple power conversion system 100 further includes a third interlock device 240, and the interlock circuit breaker 150 is connected to the first and second power generation circuit breakers 130 and 140, respectively, through the third interlock device 240. The third interlock device 240 may be an electrical interlock device, which may prevent the junction breaker 150, the first generation breaker 130, and the second generation breaker 140 from being closed at the same time, and since the first load 200 and the second load 210 are communicated when the junction breaker 150 is closed, and the first generation breaker 130 and the second generation breaker 140 are in a closed state, the first generator 180 and the second generator 190 supply power to the first load 200 and the second load 210 at the same time, which may cause a short-circuit fault to occur in the first generator 180 and the second generator 190, which may affect the operation of the multi power conversion system 100, and improve the stability of power supply of the multi power conversion system 100.

It is to be understood that the third interlock device 240 may be an electrical interlock device, the third interlock device 240 including a first contact 241, a second contact 242, a third contact 243, and a fourth contact 244, the first generation breaker 130 being connected to the first contact 241, the second generation breaker 140 being connected to the fourth contact 244, and the junction breaker 150 being connected to the second contact 242 and the third contact 243, respectively. The first contact 241 corresponds to the second contact 242, the third contact 243 corresponds to the fourth contact 244, and two corresponding contacts cannot be closed simultaneously, that is, only one of the first contact 241 and the second contact 242 can be closed at the same time, and only one of the third contact 243 and the fourth contact 244 can be closed, so that four contacts in the third interlock device 240 cannot be closed simultaneously, and the purpose of preventing the connection breaker 150, the first generation breaker 130, and the second generation breaker 140 from being closed simultaneously is achieved, that is, the first generator 180 and the second generator 190 cannot supply power to the same load at the same time, so that a power short circuit occurs, power supply of the multi-power conversion system 100 is affected, and safety and stability of the multi-power conversion system 100 are improved.

It is understood that the multi-power conversion system 100 further includes a first driver, and in case that the first transformer 160 fails to supply power to the first load 200 normally, the first driver is connected to the second contact 242, the first mains breaker 110 and the first power generation breaker 130, respectively, so as to drive the second contact 242 and the first mains breaker 110 to be opened and drive the first power generation breaker 130 to be closed. Therefore, the first generator 180 can provide power for the first load 200, thereby reducing the time for the first load 200 to recover power supply and improving the operation and maintenance efficiency. In case the first transformer 160 is not faulty, the first driver may be connected with the second contacts 242, the first mains breaker 110 and the first power generation breaker 130. In addition, when the first transformer 160 is recovered to normal, the first driver drives the first power generation breaker 130 to open, and drives the first commercial power breaker 110 and the second contact 242 to close, so that the first transformer 160 can provide power for the first load 200, complete the switching of the power supply, and can maintain the power supply for the first load 200, thereby maintaining the normal operation of the first load 200.

It is understood that the multi-power conversion system 100 further includes a second driver, and in case that the second transformer 170 fails to supply power to the second load 210 normally, the second driver is connected to the third contact 243, the second mains breaker 120 and the second generation breaker 140, respectively, so as to drive the third contact 243 and the second mains breaker 120 to be opened and drive the second generation breaker 140 to be closed. Therefore, the second generator 190 can provide power for the second load 210, reducing the time for the second load 210 to recover power, and improving the operation and maintenance efficiency. Under the condition that the second transformer 170 is recovered to be normal, the second driver drives the second power generation breaker 140 to be opened, and drives the second commercial power breaker 120 and the third contact 243 to be closed, so that the second transformer 170 can provide power for the second load 210, complete the switching of the power supply, and can keep providing power for the second load 210, and maintain the normal operation of the second load 210. In addition, in case the second transformer 170 is not faulty, a second driver may be connected with the third contact 243, the second mains breaker 120 and the second power generation breaker 140.

It is understood that the multi power conversion system 100 further includes a third driver, in case of a failure of both the first transformer 160 and the first generator 180, or in case of a low voltage required by the first load 200 and the second load 210, the third driver is connected to the first contact 241, the fourth contact 244, the first mains breaker 110, the second mains breaker 120 and the junction breaker 150, respectively, such that the third driver drives the first contact 241, the fourth contact 244 and the first mains breaker 110 to be opened, avoids the junction breaker 150, the first generator breaker 130 and the second generator breaker 140 to be closed simultaneously, drives the second mains breaker 120 and the junction breaker 150 to be closed, can connect the first load 200 and the second load 210, and simultaneously supplies power to the first load 200 and the second load 210 through the second transformer 170, and thus, the multi power conversion system 100 can improve the operation and maintenance efficiency, the operation and maintenance personnel can operate and use conveniently, and the power cost is saved.

It is understood that the multi power conversion system 100 further includes a fourth driver, and in case of a failure of both the second transformer 170 and the second power generator 190, or in case of a low voltage requirement of the first load 200 and the second load 210, the fourth driver is respectively connected to the first contact 241, the fourth contact 244, the first mains breaker 110, the second mains breaker 120 and the junction breaker 150, so that the fourth driver drives the first contact 241, the fourth contact 244 and the second mains breaker 120 to be opened, the junction breaker 150, the first power generation breaker 130 and the second power generation breaker 140 to be closed at the same time, the first mains breaker 110 and the junction breaker 150 to be closed, the first load 200 and the second load 210 can be communicated, the first load 200 and the second load 210 are simultaneously supplied with power through the first transformer 160, the operation and maintenance efficiency is improved, and the operation and use of operation and maintenance personnel are facilitated, and the power supply cost is saved.

It is understood that the multiple power conversion system 100 further comprises a fourth interlock device, by which the interlock circuit breaker 150 is connected with the first and second mains circuit breakers 110 and 120, respectively. The fourth interlock device may be an electrical interlock device, which may prevent the junction breaker 150, the first utility power breaker 110, and the second utility power breaker 120 from being closed simultaneously, and when the junction breaker 150 is closed, the first load 200 and the second load 210 are communicated, and the first utility power breaker 110 and the second utility power breaker 120 are in a closed state, the first transformer 160 and the second transformer 170 supply power to the first load 200 and the second load 210 simultaneously, which may cause a short-circuit fault to occur in the first transformer 160 and the second transformer 170, thereby affecting the operation of the multi-power-supply conversion system 100, and improving the stability of power supply of the multi-power-supply conversion system 100.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A multiple power conversion system, comprising: the system comprises a first commercial power circuit breaker, a second commercial power circuit breaker, a first power generation circuit breaker, a second power generation circuit breaker, a junction circuit breaker, a first transformer, a second transformer, a first power generator, a second power generator, a first load and a second load;

the first transformer is connected with the first load through the first commercial power circuit breaker, the second transformer is connected with the second load through the second commercial power circuit breaker, the first generator is connected with the first load through the first power circuit breaker, the second transformer is connected with the second load through the second power circuit breaker, and the first load is connected with the second load through the connecting circuit breaker.

2. The multiple power conversion system of claim 1, further comprising a first interlock device for preventing simultaneous closing of the first utility circuit breaker and the first power generation circuit breaker, the first interlock device being connected between the first utility circuit breaker and the first power generation circuit breaker.

3. The multiple power conversion system of claim 1, further comprising a second interlock device for preventing simultaneous closing of the second mains circuit breaker and the second power generation circuit breaker, the second interlock device being connected between the second mains circuit breaker and the second power generation circuit breaker.

4. The multiple power conversion system of claim 1, further comprising a third interlock device for preventing simultaneous closing of the junction breaker, the first generation breaker, and the second generation breaker, the junction breaker being connected to the first generation breaker and the second generation breaker through the third interlock device, respectively.

5. The multiple power conversion system of claim 4, wherein the third interlock device includes a first contact, a second contact, a third contact, and a fourth contact, the first power generation circuit breaker being connected with the first contact, the second power generation circuit breaker being connected with the fourth contact, the coupling circuit breakers being connected with the second contact and the third contact, respectively, the first contact corresponding to the second contact, the third contact corresponding to the fourth contact.

6. The multi power conversion system according to claim 5, further comprising a first driver connected to the second contact, the first mains breaker and the first power generation breaker, respectively, in case of failure of the first transformer, thereby driving the second contact and the first mains breaker to open and the first power generation breaker to close.

7. The multi power conversion system according to claim 5, further comprising a second driver connected to the third contact, the second mains breaker and the second power generation breaker, respectively, in case of failure of the second transformer, so as to drive the third contact and the second mains breaker to open and the second power generation breaker to close.

8. The multi-power-supply conversion system according to claim 5, further comprising a third driver connected to the first contact, the fourth contact, the first mains circuit breaker, the second mains circuit breaker and the junction circuit breaker, respectively, in case of failure of both the first transformer and the first generator, so as to drive the first contact, the fourth contact and the first mains circuit breaker to open and drive the second mains circuit breaker and the junction circuit breaker to close.

9. The multi power conversion system according to claim 5, further comprising a fourth driver connected to the first contact, the fourth contact, the first mains breaker, the second mains breaker and the junction breaker, respectively, in case of failure of both the second transformer and the second generator, thereby driving the first contact, the fourth contact and the second mains breaker to open and driving the first mains breaker and the junction breaker to close.

10. The multiple power conversion system according to claim 4, further comprising a fourth interlock device for preventing simultaneous closing of the junction breaker, the first mains breaker and the second mains breaker, the junction breaker being connected to the first mains breaker and the second mains breaker respectively through the fourth interlock device.

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