Energy storage coordination management device of off-grid alternating current collection direct current power transmission system

Abstract

The utility model discloses an energy storage coordination management device of an off-grid alternating current collection direct current power transmission system, which comprises an alternating current energy storage controller, a first photoelectric conversion interface, a direct current energy storage controller, a second photoelectric conversion interface and an energy storage coordination controller, the direct current energy storage controller is connected with a direct current system through a second photoelectric conversion interface, and the signal transmission end of the alternating current energy storage controller and the signal transmission end of the direct current energy storage controller are both connected with the signal transmission end of the energy storage coordination controller. According to the utility model, the off-grid system can be rapidly adjusted, the influence of new energy power supply fluctuation on the off-grid system is reduced, the continuity of the off-grid direct current power transmission system and the stability of the voltage frequency of the off-grid alternating current power transmission system are comprehensively ensured, and the stability and the economic operation level of the off-grid system are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy transmission technology field, concretely relates to a kind of energy storage coordination management device of off-grid ac collection dc transmission system. BACKGROUND

[0002] With the progress of renewable energy technology, especially the development of solar energy, wind energy and energy storage technology, the efficiency and reliability of off-grid power systems have been significantly improved, and in remote areas, disaster areas and areas with high environmental protection requirements, off-grid power systems have gradually become an important research and application field worldwide.

[0003] Currently, off-grid transmission systems have been widely used in remote rural areas, islands, scientific research sites, disaster areas and emergency power supply fields, providing reliable power supply for places without power grids or unstable power grids. At the same time, with the progress of modern battery technology (such as lithium batteries, sodium ion batteries), energy storage system management technology and network construction technology, off-grid systems can better balance supply and demand, and further improve reliability.

[0004] Off-grid new energy technology mainly develops in the following two directions: on the one hand, by reasonably configuring energy storage systems and designing advanced optimization algorithms, the reliability of the system is improved under the premise of limited investment; on the other hand, through industry demand analysis, industrial systems with as low as possible power supply reliability requirements are configured at the load end of off-grid systems, off-grid new energy systems are first put into commercial operation, and then through system optimization and technology iteration, industrial upgrading is completed.

[0005] However, with the continuous increase of new energy transmission capacity, off-grid energy has gradually shifted from dispersed consumption to centralized consumption, and long-distance power transmission has taken shape, requiring high coordination and management of energy. Currently, the energy coordination of off-grid transmission systems is only for AC transmission systems or DC transmission systems, without combining both for energy storage coordination management, which cannot achieve precise control and optimal scheduling of electric energy. SUMMARY

[0006] The purpose of the utility model is to solve the deficiencies in the above background technology, and to provide an energy storage coordination management device for off-grid ac collection dc transmission system.

[0007] The technical scheme of the utility model is: a kind of energy storage coordination management device of off-grid alternating current collection direct current transmission system, including alternating current energy storage controller, first photoelectric conversion interface, direct current energy storage controller, second photoelectric conversion interface and energy storage coordination controller, the alternating current energy storage controller is connected alternating current system by first photoelectric conversion interface, the direct current energy storage controller is connected direct current system by second photoelectric conversion interface, the signal transmission end of alternating current energy storage controller and direct current energy storage controller is connected the signal transmission end of energy storage coordination controller.

[0008] Further, the alternating current energy storage controller and direct current energy storage controller and energy storage coordination controller adopt GOOSE communication protocol for signal transmission.

[0009] Further, the model of first photoelectric conversion interface and second photoelectric conversion interface is S5735S-L24P4X-A1.

[0010] Further, the model of alternating current energy storage controller, direct current energy storage controller and energy storage coordination controller is i7-14700k.

[0011] Further, the alternating current system includes at least one of new energy plant station and alternating current energy storage plant station.

[0012] Further, the alternating current energy storage plant station includes at least one of electrochemical energy storage, compressed air energy storage, flywheel flow energy storage and pumped storage.

[0013] Further, the direct current system includes at least one of direct current transmission control system and direct current energy storage device.

[0014] Further, the direct current transmission control system is active energy control transmission system using full-bridge sub-module or full-half bridge hybrid sub-module.

[0015] The utility model has the advantages that:

[0016] The utility model arranges energy storage coordination management device at new energy alternating current collection station, and energy storage coordination management device contains alternating current energy storage controller, direct current energy storage controller, energy storage coordination controller and corresponding conversion interface, carries out information collection, instruction transmission etc. to alternating current transmission system and direct current transmission system of off-grid of alternating current energy storage controller, direct current energy storage controller, energy storage coordination controller, to realize the quick adjustment of off-grid system, reduce the influence that new energy power supply fluctuation brings to off-grid system, guarantee the continuity of off-grid direct current transmission system, voltage frequency stability of off-grid alternating current transmission system, improve off-grid system stability and economic operation level. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the principle schematic diagram of the utility model.

[0018] Figure 2 This is a schematic diagram of the application of this utility model to an off-grid AC-DC power transmission system.

[0019] In the diagram: 1-AC energy storage controller; 2-DC energy storage controller; 3-energy storage coordination controller; 4-first photoelectric conversion interface; 5-second photoelectric conversion interface; 6-AC energy storage plant; 7-new energy plant; 8-DC energy storage equipment; 9-DC power transmission control system. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] like Figure 1 , Figure 2 As shown, this utility model provides an energy storage coordination management device for an off-grid AC-DC power transmission system, including an AC energy storage controller 1, a first photoelectric conversion interface 4, a DC energy storage controller 2, a second photoelectric conversion interface 5, and an energy storage coordination controller 3. The AC energy storage controller 1 is connected to the AC system through the first photoelectric conversion interface 4, and the DC energy storage controller 2 is connected to the DC system through the second photoelectric conversion interface 5. The signal transmission terminals of both the AC energy storage controller 1 and the DC energy storage controller 2 are connected to the signal transmission terminal of the energy storage coordination controller 3.

[0022] This utility model deploys an energy storage coordination and management device at a new energy AC collection station. The energy storage coordination and management device includes an AC energy storage controller 1, a DC energy storage controller 2, an energy storage coordination controller 3, and corresponding conversion interfaces. Through the management architecture composed of the AC energy storage controller, DC energy storage controller, and energy storage coordination controller, the AC and DC systems are connected, realizing functions such as information collection and command transmission between the off-grid AC transmission system and the DC transmission system. This enables rapid adjustment of the off-grid system, reduces the impact of new energy power fluctuations on the off-grid system, comprehensively ensures the continuity of the off-grid DC transmission system and the voltage and frequency stability of the off-grid AC transmission system, and improves the stability and economic operation level of the off-grid system.

[0023] It is understood that the AC energy storage controller 1 and DC energy storage controller 2 communicate with the energy storage coordination controller 3 using corresponding optical cables, electrical cables and the GOOSE communication protocol. This eliminates the need to modify the existing energy storage control system's communication interface, thus reducing the complexity of the energy storage coordination management device.

[0024] It can be understood that the first photoelectric conversion interface 4 and the second photoelectric conversion interface 5 are both used for signal conversion and transmission functions, and have similar functions, so the same device can be used, and the preferred product model is S5735S-L24P4X-A1; the direct current energy storage controller 1, the alternating current energy storage controller 3 and the energy storage coordination controller 3 also have similar functions, and are used for signal acquisition, transmission and other functions, so the same processor device can be used, and the preferred product model is i7-14700k.

[0025] It should be noted that the alternating current system includes but is not limited to a new energy plant 6 and an alternating current energy storage plant 7, wherein the new energy plant 6 includes but is not limited to a wind power plant, a solar power plant or similar power generation equipment; the alternating current energy storage plant 7 includes but is not limited to alternating current energy storage batteries, electrochemical energy storage, compressed air energy storage, flywheel energy storage, pumped storage, alternating current collection equipment, alternating current collection and transformation equipment, etc. According to the types and quantities of alternating current system equipment, one or more corresponding alternating current energy storage controllers and corresponding first photoelectric conversion interfaces can be arranged, and the arrangement is specifically according to actual needs.

[0026] It should be noted that the direct current system includes but is not limited to a direct current energy storage device 8 with energy storage capability and a direct current transmission control system 9, wherein the direct current energy storage device 8 includes but is not limited to a battery and a super capacitor; the direct current transmission control system 9 includes but is not limited to an active energy control transmission system using full-bridge sub-modules or full-half bridge hybrid sub-modules. According to the types and quantities of direct current transmission system equipment, one or more corresponding direct current energy storage controllers and corresponding second photoelectric conversion interfaces can be arranged, and the arrangement is specifically according to actual needs.

[0027] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. The contents not described in detail in the specification belong to the existing technology known by the professional technicians in the art.

Claims

1. An energy storage coordination management device of an off-grid alternating current (AC) aggregation direct current (DC) power transmission system, characterized in that: The AC energy storage controller, the first photoelectric conversion interface, the DC energy storage controller, the second photoelectric conversion interface and the energy storage coordination controller are included, the AC energy storage controller is connected with an AC system through the first photoelectric conversion interface, the DC energy storage controller is connected with a DC system through the second photoelectric conversion interface, and the signal transmission ends of the AC energy storage controller and the DC energy storage controller are connected with the signal transmission end of the energy storage coordination controller.

2. The energy storage coordinating management device of the off-grid AC collection DC transmission system according to claim 1, characterized in that: The AC energy storage controller and the DC energy storage controller adopt a GOOSE communication protocol to transmit signals with the energy storage coordination controller.

3. The energy storage coordinating management device of the off-grid AC collection DC transmission system according to claim 1, characterized in that: The first photoelectric conversion interface and the second photoelectric conversion interface are both S5735S-L24P4X-A1.

4. The energy storage coordinating management device of the off-grid AC collection DC transmission system according to claim 1, characterized in that: The AC energy storage controller, the DC energy storage controller and the energy storage coordination controller are all i7-14700k.

5. The energy storage coordinating management device of an off-grid AC collection DC transmission system according to claim 1, characterized in that: The AC system includes at least one of a new energy plant station and an AC energy storage plant station.

6. The energy storage coordinating management device of the off-grid AC collection DC transmission system according to claim 5, characterized in that: The AC energy storage plant station includes at least one of electrochemical energy storage, compressed air energy storage, flywheel energy storage and pumped storage.

7. The energy storage coordinating management device of an off-grid AC collection DC transmission system according to claim 1, characterized in that: The DC system includes at least one of a DC power transmission control system and a DC energy storage device.

8. The energy storage coordinating management device of the off-grid AC collection DC transmission system according to claim 7, characterized in that: The DC power transmission control system is an active energy control power transmission system adopting a full-bridge sub-module or a full-half-bridge hybrid sub-module.

Images