Expandable light storage and charging modular combination device

Abstract

An expandable optical storage and charging modular combination device is applied to access of various types of equipment in a source network load storage micro-grid, and is characterized by comprising an alternating current power supply module, an alternating current load module, an energy storage module, a charging pile module, a direct current load module and power distribution cabinets with the same structure and size, any type of modules and any number of modules can be directly combined and assembled pairwise; a bus, a bus circuit breaker, a converter, a converter circuit breaker, a controller and a CAN bus are arranged in each power distribution cabinet; the buses between every two modules are flexibly connected through copper bars, and the CAN buses between every two modules are connected through shielded twisted pairs; the controllers configured in the modules have the same functions and models, and can acquire and control the operation data of bus circuit breakers, converters and converter open circuits of the respective modules; the controller adopts a CAN to communicate with controllers of all other modules, and can be set as a main controller to regulate and control other controllers.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of expandable light storage and charging modular combination device, belong to distributed energy storage power grid equipment field. BACKGROUND

[0002] With the development of new energy and energy storage technology, industrial and commercial users are also gradually developing distributed photovoltaic, energy storage charging pile equipment construction, but the scale, nature of different users is different, the type and configuration scheme of equipment used is different, the professional and meticulous research and planning of equipment selection, equipment deployment scheme for users or design units, especially the upgrading of original light storage and charging system, will face the matching and compatibility of original electrical system and communication system, often cannot benefit old or custom equipment, extremely cumbersome.For the following problems, a light storage and charging combination device that can be modularized, support expansion and mutual compatibility is needed to facilitate the access of distributed photovoltaic, energy storage equipment and charging equipment. SUMMARY

[0003] To solve the above problems, the utility model provides a kind of expandable light storage and charging modular combination device, using the modular structure of various light storage and charging access cabinets, the same structure, any number, any kind of module can be directly combined, to facilitate the access and capacity expansion of various types of equipment in source network load storage microgrid.

[0004] A kind of expandable light storage and charging modular combination device, the electrical cabinet is applied to the access of various types of equipment in source network load storage microgrid, characterized by, including AC power module, AC load module, energy storage module, photovoltaic module, charging pile module, DC load module;

[0005] The AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module and the DC load module adopt the same structure and size distribution cabinet, and any type of module and any number of modules can be directly combined and assembled between each other.

[0006] The AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module and the DC load module are each configured with a busbar 1, a busbar circuit breaker 2, a converter 3, a converter circuit breaker 4, a controller 5 and a CAN bus 6.

[0007] The converter 3 of the AC power module and the AC load module adopts AC-AC conversion.

[0008] The converter 3 of the energy storage module, the photovoltaic module, the charging pile module and the DC load module adopts AC-DC conversion.

[0009] The bus 1 between the AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module and the DC load module is connected by copper bar soft connection 11, and the CAN bus 6 between two of them is connected by shielded twisted pair 12.

[0010] The controller 5 configured in the AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module and the DC load module is the same in function and model, has operation data acquisition and operation control on the bus circuit breaker 2, the converter 3 and the converter circuit breaker 4 of the respective module, the controller 5 communicates with the controllers of all other modules through CAN, and can be set as a master controller to regulate and control other controllers.

[0011] The bus 1 in the power distribution cabinet is connected with the input end of the bus circuit breaker 2 through a conductor, the output end of the bus circuit breaker 2 is connected with the input end of the converter 3 through a conductor, the output end of the converter 3 is connected with the input end of the converter circuit breaker 4 through a conductor, and the output end of the converter circuit breaker 4 is connected with external equipment.

[0012] The controller 5 in the power distribution cabinet is connected with the CAN bus 6 through a communication line, and the controller 5 is connected with the bus circuit breaker 2, the converter 3 and the converter circuit breaker 4 through a signal line.

[0013] The controller 5 collects the on-off state of the bus circuit breaker 2 and controls the on-off action of the bus circuit breaker 2, collects the on-off state of the converter circuit breaker 4 and controls the on-off action of the converter circuit breaker 4, and collects the running state of the converter 3 and controls the start-stop, running mode and running parameter of the converter 3.

[0014] The master controller collects the running data of the bus circuit breaker 2, the converter 3 and the converter circuit breaker 4 collected by other controllers 5, and issues control instructions to other controllers 5 according to a preset program and strategy.

[0015] The utility model contains AC power module, AC load module, energy storage module, charging pile module, DC load module, can access to existing light storage and filling system various equipment, the cabinet body structure of each module is same, two two direct butt joint, complete electrical, communication, control system's connection, each controller can communicate, and by selected controller as master controller, unified control, dispatch other controller and module's operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Electrical system diagram;

[0017] Figure 2The internal arrangement of the power distribution cabinet; wherein, 1 is configured with a busbar, 2 is a busbar circuit breaker, 3 is a converter, 4 is a converter circuit breaker, 5 is a controller 5, and 6 is a CAN bus.

[0018] Figure 3 Modular direct interface structure The figure; wherein, 11 is a copper bar soft connection, and 12 is a shielded twisted pair.

[0019] Figure 4 The control system diagram; DETAILED DESCRIPTION

[0020] As Figure 1 shown, the expandable light storage and charging modular combination device includes an AC power module, an AC load module, an energy storage module, a photovoltaic module, a charging pile module, and a DC load module; any two modules can form a power grid through an AC bus, and the types of modules are not limited, and the number of each type is not limited.

[0021] The input end of the AC power module is connected to an AC power source, the input end of the AC load module is connected to an AC load, the input end of the energy storage module is connected to a DC line of energy storage, the input end of the charging pile module is connected to a charging gun, and the input end of the DC load module is connected to a DC load.

[0022] The AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module, and the DC load module adopt a power distribution cabinet with the same structure and size.

[0023] As Figure 2 shown, all modules are configured with a busbar 1, a busbar circuit breaker 2, a converter 3, a converter circuit breaker 4, a controller 5, and a CAN bus 6. The busbar 1 is connected to the input end of the busbar circuit breaker 2 through a conductor; the output end of the busbar circuit breaker 2 is connected to the input end of the converter 3 through a conductor; the output end of the converter 3 is connected to the input end of the converter circuit breaker 4 through a conductor; the output end of the converter circuit breaker 4 is connected to an external device. The controller 5 inside the power distribution cabinet is connected to the CAN bus 6 through a communication line; the controller 5 is connected to the busbar circuit breaker 2, the converter 3, and the converter circuit breaker 4 through a signal line.

[0024] All busbar circuit breakers 2 are AC circuit breakers with rated voltage matching the voltage of the busbar 1 and rated current matching the converter of the respective module; the converters 3 of the AC power module and the AC load module adopt AC-AC conversion; the converters 3 of the energy storage module, the charging pile module, and the DC load module adopt AC-DC conversion; the converter circuit breakers 4 of the AC power module and the AC load module are AC circuit breakers with rated current matching the converter of the respective module and rated voltage matching the voltage of the AC power source and the AC load.

[0025] The capacity of the converter is selected according to the system function and the power of the power supply, load, new energy and charging device to be connected. The primary condition is that the capacity of the converter should be greater than the power of the power supply, load, new energy and charging device connected respectively; the second condition is that, according to the type and function of the combination device connected to the power grid, if it is used for off-grid micro-grid power supply, the sum of the capacities of the energy storage modules is greater than the sum of the capacities of the photovoltaic modules, the sum of the capacities of the AC load modules, charging pile modules and DC load modules is greater than the sum of the capacities of the photovoltaic modules, and the sum of the capacities of the energy storage modules is greater than the sum of the capacities of the AC load modules, charging pile modules and DC load modules; if it is a grid-connected type, the sum of the capacities of the AC power supply modules is greater than the sum of the capacities of the AC load modules, charging pile modules and DC load modules, the sum of the capacities of the AC power supply modules is greater than the sum of the capacities of the photovoltaic modules, and the sum of the capacities of the AC power supply modules is greater than the sum of the capacities of the energy storage modules.

[0026] The controller 5 collects the on-off state of the bus breaker 2 and controls the on-off action of the bus breaker 2; the controller 5 collects the on-off state of the converter breaker 4 and controls the on-off action of the converter breaker 4; the controller 5 collects the running state of the converter 3 and controls the start-stop, running mode and running parameters of the converter 3.

[0027] As shown in FIG. 3, the bus 1 between the modules is connected by copper bar soft connection 11, and the CAN bus 6 between the modules is connected by shielded twisted pair 12.

[0028] As shown in FIG. 3, the bus 1 between the modules is connected by copper bar soft connection 11, and the CAN bus 6 between the modules is connected by shielded twisted pair 12. Figure 4 As shown in FIG. 3, the bus 1 between the modules is connected by copper bar soft connection 11, and the CAN bus 6 between the modules is connected by shielded twisted pair 12.

[0029] Typical configuration and operation cases are as follows:

[0030] The grid-connected operation model has an AC power supply module with a capacity of 300kW, an AC power supply of 380V, a bus power supply of 380V; an AC load module with a capacity of 100kW, a load voltage of 380V; an energy storage module A with a capacity of 100kW, an energy storage voltage of 450V; an energy storage module B with a capacity of 150kW, an energy storage voltage of 650V; a photovoltaic module A with a capacity of 120kW, a photovoltaic DC voltage of 480V; a photovoltaic module A with a capacity of 160kW, a photovoltaic DC voltage of 700V; a charging pile module with a capacity of 75kW, a charging gun DC voltage of 690V; and a DC load module with a capacity of 50kW, a photovoltaic DC voltage of 220V.

[0031] The power distribution cabinets of the AC power module, the AC load module, the energy storage module A, the energy storage module B, the photovoltaic module A, the photovoltaic module B, the charging pile module and the DC load module can be placed in turn to butt the busbar and the CAN bus. The busbar line loss or the busbar current carrying capacity can be considered, the AC power module is placed in the middle, the load, the new energy and the energy storage are symmetrically arranged, the energy storage module A and the energy storage module B are located on the two sides of the AC power module, the photovoltaic module A and the photovoltaic module B are located on the two sides of the AC power module, and the AC load module, the charging pile module and the DC load module are located on the two sides of the AC power module. If the system is increased in capacity or upgraded, new modules are added according to the same switch cabinet structure, and are accessed in parallel.

[0032] When the controller of the AC power module is used as the master controller, communication is performed with other controllers, and the operation of equipment is monitored. If it is found that the AC power module supplies power to the AC power supply, the photovoltaic module A or B is generating power, the energy storage devices connected to the energy storage module A and B are not full and the charging power does not reach the quota power, the master controller takes 0 as the target of the power supply of the AC power module, calculates the charging power value to be reached by the energy storage module A and B, communicates with the controllers of the energy storage module A and B through the CAN bus of the AC power module, and issues control instructions. The converters of the energy storage module A and B receive the instructions of the respective controllers and adjust the charging power.

[0033] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. An expandable light storage and charging modular combination device, the device is applied to the access of various types of equipment in the source network load storage micro-grid, characterized in that, The AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module, and the DC load module adopt the same structure and size of power distribution cabinet, and any two of the modules can be directly combined and assembled. The AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module, and the DC load module are each configured with a bus 1, a bus circuit breaker 2, a converter 3, a converter circuit breaker 4, a controller 5, and a CAN bus 6. The converter 3 of the AC power module and the AC load module adopts AC-AC conversion. The converter 3 of the energy storage module, the photovoltaic module, the charging pile module, and the DC load module adopts AC-DC conversion. The buses 1 between any two of the AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module, and the DC load module are connected by copper bar soft connection 11, and the CAN buses 6 between any two of the modules are connected by shielded twisted pair 12. The controllers 5 configured in the AC power module, the AC load module, the energy storage module, the photovoltaic module, the charging pile module, and the DC load module have the same function and model, and have the functions of collecting and operating the bus circuit breaker 2, the converter 3, and the converter circuit breaker 4 of the respective modules. The controller 5 communicates with the controllers of all other modules through CAN, and can be set as a master controller to control other controllers. The bus 1 in the power distribution cabinet is connected to the input end of the bus circuit breaker 2 through a conductor; the output end of the bus circuit breaker 2 is connected to the input end of the converter 3 through a conductor; the output end of the converter 3 is connected to the input end of the converter circuit breaker 4 through a conductor; and the output end of the converter circuit breaker 4 is connected to external equipment.

2. The scalable light storage and charging modular combination device according to claim 1, wherein, The controller 5 in the power distribution cabinet is connected to the CAN bus 6 through a communication line; and the controller 5 is connected to the bus circuit breaker 2, the converter 3, and the converter circuit breaker 4 through signal lines.

3. The scalable light storage and charging modular combination device according to claim 1, wherein, The controller 5 collects the opening and closing states of the bus circuit breaker 2, controls the opening and closing actions of the bus circuit breaker 2, collects the opening and closing states of the converter circuit breaker 4, controls the opening and closing actions of the converter circuit breaker 4, and collects the running state of the converter 3, controls the start and stop, running mode, and running parameters of the converter 3. The master controller collects the running data of the bus circuit breaker 2, the converter 3, and the converter circuit breaker 4 collected by other controllers 5, and gives control instructions to other controllers 5 according to preset programs and strategies.

4. The scalable light storage and charging modular combination device according to claim 1, wherein, ​

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