Synchronous grid-connected control box

Abstract

The utility model provides a synchronous grid-connected control box which comprises a box body, and a grid-connected controller and a molded case circuit breaker are respectively integrated in the box body. The molded case circuit breaker comprises an MCB switch and an MGCB switch. One end of the MGCB switch is provided with a power generation incoming line bus copper bar; one end of the MCB switch is provided with a mains supply bus copper bar; the power generation incoming line copper busbar is electrically connected with the low-voltage power generation vehicle through a first power generation incoming line quick plug; the commercial power bus copper bar is electrically connected with the low-voltage power distribution system through a commercial power inlet wire quick plug; the other end of the MCB switch and the other end of the MGCB switch are connected in parallel and then are electrically connected with a low-voltage power distribution system through a second power generation incoming line quick plug. According to the utility model, a single unit is connected with the commercial power, and the reverse synchronization of the MCB switch and the synchronous closing and opening of the MGCB switch are controlled, so that the secondary grid-connected function of the single unit and the grid-connected power control are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of grid-connected control boxes, in particular to a synchronous grid-connected control box. Background Art

[0002] With the continuous development of power systems, the demand for power supply reliability is becoming increasingly stringent. To reduce power outages for users during equipment maintenance, it is necessary to install generator trucks in public power distribution rooms. Low-voltage generator trucks are connected to low-voltage equipment via flexible cables. This effectively ensures that power is maintained during line and equipment outages for maintenance, minimizing the impact of power outages on customers.

[0003] During the power supply maintenance operation of low-voltage generator trucks, short-term power outages are required to ensure the connection and disconnection of low-voltage equipment due to operational procedures and safety regulations. However, factors such as complex construction site environments, aging equipment, and varying equipment types add additional difficulties to the operation, resulting in prolonged short-term power outages and unnecessary economic losses. This has long been a problem that has plagued power supply bureaus in ensuring power supply quality and improving user satisfaction. Therefore, a synchronous grid-connected control box is needed to solve this technical problem. Utility Model Content

[0004] The utility model aims to provide a synchronous grid-connected control box, which adopts a single machine to connect to the mains, controls the anti-synchronization of the MCB switch and the synchronous closing and opening of the MGCB switch, and realizes the secondary grid-connected function of the single unit and the grid-connected power control.

[0005] In order to achieve the above-mentioned object, the present invention is implemented through the following technical solution: a synchronous grid-connected control box, comprising a box body, wherein: a grid-connected controller and a molded case circuit breaker are respectively integrated in the box body; the molded case circuit breaker includes an MCB switch and an MGCB switch; one end of the MGCB switch is provided with a generator incoming line busbar; one end of the MCB switch is provided with a mains busbar; the generator incoming line busbar is electrically connected to a low-voltage generator vehicle through a first generator incoming line quick plug; the mains busbar is electrically connected to a low-voltage power distribution system through a mains incoming line quick plug; the other end of the MCB switch and the other end of the MGCB switch are connected in parallel and electrically connected to the low-voltage power distribution system through a second generator incoming line quick plug.

[0006] As a further improvement of the technical solution of the present invention, the low-voltage generator vehicle includes a parallel controller and a GCB switch; the parallel controller is electrically connected to the GCB switch; the GCB switch is electrically connected to the generator incoming line busbar through the first generator incoming line quick plug.

[0007] As a further improvement of the technical solution of the present invention, the low-voltage power distribution system includes a mains power supply and a mains incoming line switch; the mains power supply is electrically connected to the mains incoming line quick plug through the mains incoming line switch.

[0008] As a further improvement to the technical solution of the present utility model, an air switch is also integrated in the box.

[0009] As a further improvement to the technical solution of the present invention, a plurality of heat dissipation slots are arranged and distributed on the side walls of the box.

[0010] As a further improvement to the technical solution of the present utility model, the front of the box is provided with an MCB switch closing indicator light, an MCB switch opening indicator light, a generator side power indicator light and a mains side power indicator light; the MCB switch closing indicator light and the MCB switch opening indicator light are electrically connected to the MCB switch respectively; the generator side power indicator light is electrically connected to the low-voltage generator car; and the mains side power indicator light is electrically connected to the low-voltage power distribution system.

[0011] As a further improvement to the technical solution of the present invention, an incoming line insulation packaging plate is provided at the bottom of the box; and a plurality of incoming line holes for cables to enter are provided on the incoming line insulation packaging plate.

[0012] Beneficial effects of the utility model:

[0013] The utility model is provided with a grid connection controller and a molded case circuit breaker; the molded case circuit breaker includes an MCB switch and an MGCB switch. The utility model realizes the secondary grid connection function of the single unit and the grid connection power control by controlling the anti-synchronization of the MCB switch and the synchronous closing and opening of the MGCB switch through the connection of a single unit to the mains. Therefore, when the line and equipment are shut down for inspection and maintenance, the power supply can be guaranteed by the low-voltage generator truck, thereby avoiding the impact on customers caused by power outages, ensuring the power supply quality and improving customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of a synchronous grid-connected control box according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of a synchronous grid-connected control box according to an embodiment of the present utility model;

[0017] Figure 3 This is a single-line diagram of a mains power unit in a synchronous grid-connected control box according to an embodiment of the present invention.

[0018] In the attached figure: 1- cabinet; 2- grid-connected controller; 3- molded case circuit breaker; 4- air switch; 5- heat sink; 6- MCB switch closing indicator light; 7- MCB switch opening indicator light; 8- generator side power indicator light; 9- mains side power indicator light; 10- incoming line insulation packaging board. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0020] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In this utility model, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0022] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one such feature. Furthermore, the technical solutions of various embodiments may be combined with each other, but only on the basis that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions contradicts or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 3As shown, a synchronous grid-connected control box includes a box body 1, wherein: a grid-connected controller 2 and a molded case circuit breaker 3 are respectively integrated in the box body 1; the molded case circuit breaker 3 includes an MCB switch and an MGCB switch; one end of the MGCB switch is provided with a generator incoming line busbar; one end of the MCB switch is provided with a mains busbar; the generator incoming line busbar is electrically connected to a low-voltage generator vehicle through a first generator incoming line quick plug; the mains busbar is electrically connected to a low-voltage power distribution system through a mains incoming line quick plug; the other end of the MCB switch and the other end of the MGCB switch are connected in parallel and electrically connected to the low-voltage power distribution system through a second generator incoming line quick plug. The utility model is provided with a grid connection controller 2 and a molded case circuit breaker 3; the molded case circuit breaker 3 includes an MCB switch and an MGCB switch. The utility model realizes the secondary grid connection function and grid connection power control of a single unit by connecting a single unit to the mains, controlling the anti-synchronization of the MCB switch and the synchronous closing and opening of the MGCB switch, thereby realizing the power supply of a single unit and the grid connection power control, thereby realizing the power supply guarantee by a low-voltage generator vehicle when the line or equipment is shut down for inspection and maintenance, avoiding the impact on customers caused by power outages, ensuring the power supply quality, and improving customer satisfaction.

[0025] Specifically, in this embodiment, the low-voltage generator vehicle includes a parallel controller and a GCB switch; the parallel controller is electrically connected to the GCB switch; and the GCB switch is electrically connected to the generator incoming line busbar through the first generator incoming line quick plug.

[0026] Specifically, in this embodiment, the low-voltage power distribution system includes a mains power supply and a mains incoming line switch; the mains power supply is electrically connected to the mains incoming line quick plug via the mains incoming line switch.

[0027] Specifically, in this embodiment, an air switch 4 is also integrated in the box body 1 .

[0028] Specifically, in this embodiment, a plurality of heat dissipation slots 5 are arranged and distributed on the side wall of the box 1. It should be noted that by providing the heat dissipation slots 5 on the box 1, the heat generated inside the box 1 is effectively dissipated, ensuring the normal operation of the equipment or electronic devices in the box 1.

[0029] Specifically, in this embodiment, the front of the box 1 is provided with an MCB switch closing indicator light 6, an MCB switch opening indicator light 7, a generator side power indicator light 8 and a mains side power indicator light 9; the MCB switch closing indicator light 6 and the MCB switch opening indicator light 7 are electrically connected to the MCB switch, respectively; the generator side power indicator light 8 is electrically connected to the low-voltage generator car; and the mains side power indicator light 9 is electrically connected to the low-voltage power distribution system.

[0030] Specifically, in this embodiment, an incoming line insulation packaging plate 10 is provided at the bottom of the box body 1; and a plurality of incoming line holes for cables to enter are provided on the incoming line insulation packaging plate 10.

[0031] Reference Figure 3 , the working principle of this utility model:

[0032] The operation steps for the non-sensing access of a single generator vehicle:

[0033] Complete the electrical connections and the communication cables of each controller according to the single-line diagram of a single AC unit;

[0034] Complete the operating parameter settings of the parallel controller for a single generator vehicle;

[0035] Complete the setting of operating parameters of the synchronous grid-connected transfer box and grid controller 2;

[0036] Start the generator car and enter the hot standby state. After the unit stabilizes, the parallel controller issues a command to control the GCB switch to close.

[0037] After the synchronous grid-connected transfer box and grid controller 2 complete the synchronization check with the system power supply, it controls the transfer box MGCB switch to close;

[0038] The grid-connected controller 2 adjusts and controls the output power of the grid-connected generator set according to the current operating load;

[0039] Manually operate the mains power incoming line switch to open and complete the temporary power generation vehicle's seamless access.

[0040] Single generator car non-sensing exit operation steps:

[0041] The grid-connected controller 2 detects that the power supply side of the mains incoming line switch has been restored, and the anti-synchronous control transfer box MCB switch is closed;

[0042] At the same time, control the switch of the transfer box MGCB to open;

[0043] After the grid controller 2 completes the communication with the generator vehicle parallel controller, the parallel controller issues a stop signal.

[0044] Machine instructions, control the GCB switch opening of the generator car, and the unloading and shutdown of the generator car;

[0045] Manually operate the mains power incoming line switch to close;

[0046] The grid-connected controller 2 detects that the load side of the mains incoming line switch (load current is flowing) has restored power supply, and issues a command to control the MCB switch to open, completing the temporary generator car's sensorless exit;

[0047] Remove the electrical connections of the generator truck for temporary access to the debugging system.

[0048] This utility model connects a single unit to the mains, controls the anti-synchronization of the MCB switch and the synchronous closing and opening of the MGCB switch, and achieves the secondary grid connection function and grid power control of the single unit. This allows the low-voltage generator truck to maintain power supply during line and equipment power outages for inspection and maintenance, thus avoiding the impact of power outages on customers, ensuring power supply quality, and improving customer satisfaction. The utility model has a reliable and durable structure and can be processed and manufactured in a standardized manner.

[0049] The above is a detailed introduction to the technical solutions provided by the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A synchronous grid-connected control box, comprising a box body, characterized in that: The box is respectively integrated with a grid-connected controller and a molded case circuit breaker; the molded case circuit breaker includes an MCB switch and an MGCB switch; one end of the MGCB switch is provided with a generator incoming line busbar; one end of the MCB switch is provided with a mains busbar; the generator incoming line busbar is electrically connected to the low-voltage generator vehicle through a first generator incoming line quick plug; the mains busbar is electrically connected to the low-voltage power distribution system through a mains incoming line quick plug; the other end of the MCB switch and the other end of the MGCB switch are connected in parallel and electrically connected to the low-voltage power distribution system through a second generator incoming line quick plug.

2. A synchronous grid-connected control box according to claim 1, characterized in that: The low-voltage generator vehicle includes a parallel controller and a GCB switch; the parallel controller is electrically connected to the GCB switch; the GCB switch is electrically connected to the generator incoming line busbar through the first generator incoming line quick plug.

3. A synchronous grid-connected control box according to claim 1, characterized in that: The low-voltage power distribution system includes a mains power supply and a mains incoming line switch; the mains power supply is electrically connected to the mains incoming line quick plug through the mains incoming line switch.

4. The synchronous grid-connected control box according to claim 1, characterized in that: An air switch is also integrated in the box.

5. The synchronous grid-connected control box according to claim 1, characterized in that: A plurality of heat dissipation slots are arranged and distributed on the side wall of the box body.

6. The synchronous grid-connected control box according to claim 1, characterized in that: The front of the box is distributed with an MCB switch closing indicator light, an MCB switch opening indicator light, a generator side power indicator light and a mains side power indicator light; the MCB switch closing indicator light and the MCB switch opening indicator light are electrically connected to the MCB switch respectively; the generator side power indicator light is electrically connected to the low-voltage generator car; and the mains side power indicator light is electrically connected to the low-voltage power distribution system.

7. The synchronous grid-connected control box according to claim 1, characterized in that: An inlet insulation packaging plate is provided at the bottom of the box body; a plurality of inlet holes for cables to enter are provided on the inlet insulation packaging plate.

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