Near-field multi-building light storage direct-flexible system integrated control system

Abstract

The utility model discloses an integrated control system of a near-field multi-building optical storage direct-current flexible system, which is characterized in that the near-field multi-building optical storage direct-current flexible system is connected with an alternating current bus through a bidirectional AC / DC converter, and the near-field multi-building optical storage direct-current flexible system is connected with a cluster direct current bus through a bidirectional DC / DC converter; the cluster controller is connected with the data acquisition device through the data processing device, and the data acquisition device is connected with the bidirectional DC / DC converter and the flexible regulation and control energy manager. The bidirectional DC / DC converter is further connected with an input controller, one input end of the input controller is connected with the cluster direct current bus, and the other input end of the input controller is connected with the near-field multi-building light storage direct current flexible system. The utility model discloses a near-field multi-building optical storage direct-flexible system integrated control system, which can effectively manage and control optical storage direct-flexible systems in buildings, realize energy distribution and utilization, improve energy utilization efficiency and ensure stability and reliability of system operation.

Description

Technical Field

[0001] The utility model relates to the technical field of automation equipment, and in particular to an integrated control system for a near-field multi-building solar storage direct-flexible system. Background Art

[0002] In existing technologies, PV-storage, direct-flexible systems typically operate independently, lacking cluster control technology. Some low-voltage substation interconnection technologies, such as the patent application with publication number "CN117879044A" and titled "Low-Voltage Substation PV-storage, direct-flexible interconnection system," only provide interconnection devices and technical solutions, but fail to disclose PV-storage system allocation and management. This makes it difficult to manage and control PV-storage, direct-flexible systems in buildings, and makes it impossible to achieve energy distribution and utilization, resulting in low efficiency. Furthermore, the patent lacks a cluster control device, making it impossible to maximize system energy efficiency. Utility Model Content

[0003] The utility model overcomes the shortcomings of the existing technology and provides a local multi-building photovoltaic storage direct and flexible system integrated control system, which can effectively manage and control the photovoltaic storage direct and flexible systems in the building, realize the distribution and utilization of energy, improve energy utilization efficiency, and ensure the stability and reliability of system operation.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is: a local multi-building photovoltaic storage direct and flexible system integrated control system, comprising: a plurality of local multi-building photovoltaic storage direct and flexible systems; each local multi-building photovoltaic storage direct and flexible system is connected to the AC bus through a bidirectional AC / DC converter, and the local multi-building photovoltaic storage direct and flexible system is connected to the cluster DC bus through a bidirectional DC / DC converter; the cluster controller is connected to a plurality of data acquisition devices through a data processing device, and the data acquisition devices are respectively connected to the bidirectional DC / DC converter and the flexible control energy manager; it is characterized in that one end of the bidirectional DC / DC converter is connected to a branch of the cluster DC bus through a control switch, and the DC bus of the other end of the bidirectional DC / DC converter is connected to the local multi-building photovoltaic storage direct and flexible system monitored by the flexible control energy management system, and the bidirectional DC / DC converter is also connected to an access controller, the access controller is interconnected with the control switch, at least one access end of the access controller is connected to the cluster DC bus, and at least one input end is connected to the local multi-building photovoltaic storage direct and flexible system.

[0005] In a preferred embodiment of the present invention, the cluster DC bus is connected to the bidirectional DC / DC converter via a DC contactor CZ.

[0006] In a preferred embodiment of the present invention, an access controller is connected in parallel at both ends of each bidirectional DC / DC converter, and the access controller is interconnected with the DC contactor CZ to realize the on / off control of the control switch of the DC contactor CZ.

[0007] In a preferred embodiment of the present utility model, the access controller includes a voltage-stabilizing triode. The input ends of the voltage-stabilizing triode respectively lead out two access ends as access points through a resistor R1 and a resistor R2. The LED lamp and a resistor R3 connected in series at the output end of the voltage-stabilizing triode are connected to the control end of a thyristor Q2. The forward end of the thyristor Q2 is connected to a bidirectional DC / DC converter. The reverse end of the thyristor Q2 is grounded through a resistor R4, and a KM coil is also connected between the grounded end of the resistor R4 and the bidirectional DC / DC converter. The KM coil is interconnected with a DC contactor CZ.

[0008] In a preferred embodiment of the present utility model, the load or socket interface of the near-field multi-building optical storage direct-current flexible system is connected to the direct-current busbar led out by the bidirectional DC / DC converter.

[0009] In a preferred embodiment of the present utility model, the direct-current busbar of the near-field multi-building optical storage direct-current flexible system is connected to a photovoltaic system.

[0010] In a preferred embodiment of the present utility model, the direct-current busbar of the near-field multi-building optical storage direct-current flexible system is connected to an energy storage system.

[0011] In a preferred embodiment of the present utility model, the photovoltaic system, the energy storage system and the load are all connected to the direct-current busbar of the near-field multi-building optical storage direct-current flexible system through the bidirectional DC / DC converter.

[0012] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0013] A near-field multi-building optical storage direct-current flexible system integrated control system can effectively manage and control the optical storage direct-current flexible system in a building, realize the optimal distribution and utilization of energy, improve the energy utilization efficiency, and at the same time ensure the stability and reliability of the system operation.

[0014] 1. The present utility model discloses an optimized energy utilization efficiency: in the case of power self-sufficiency, the device preferentially ensures the power consumption requirements of each subsystem, and at the same time feeds the surplus power back to the superior power grid; in the case of power shortage, the device preferentially utilizes distributed power generation and relies on the power grid to supply the remaining power load, maximizing the energy utilization efficiency.

[0015] 2. Enhance system stability: when a certain subsystem fails or needs to be overhauled, the device can disconnect the connection with the cluster busbar through the bidirectional DC / DC converter of the subsystem, avoiding affecting the operation of the entire system and ensuring the overall stability and safety of the system.

[0016] 3. Promote communication between subsystems: The technology and device realize effective communication and coordination between each sub-optical storage direct-current flexible system, ensuring the efficient operation of the overall system. Brief Description of the Drawings

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0018] Figure 1 It is a schematic installation structure diagram of the integrated control system and device of the near-field multi-building optical storage direct soft system of the present application;

[0019] Figure 2 It is a schematic structural diagram of the access controller of the present application.

[0020] Figure 3 It is a schematic structural diagram of the additional cluster control system and the flexible regulation (energy manager) of each subsystem running in parallel. Detailed Embodiments

[0021] The following details the technical solution of the present utility model through the drawings and specific embodiments. It should be understood that the embodiments of the present utility model and the specific features in the embodiments are detailed descriptions of the technical solution of the present utility model, rather than limitations on the technical solution of the present utility model. Without conflict, the embodiments of the present utility model and the technical features in the embodiments can be combined with each other.

[0022] The term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " generally represents an "or" relationship between the front and rear associated objects. Embodiment 1

[0023] As Figure 1 、 Figure 2 shown, a near-field multi-building optical storage direct soft system integrated control system includes: a plurality of near-field multi-building optical storage direct soft systems; each near-field multi-building optical storage direct soft system is connected to the AC bus through a bidirectional AC / DC converter (bidirectional AC-DC converter), and the near-field multi-building optical storage direct soft system is connected to the cluster DC bus through a bidirectional DC / DC converter; the cluster controller is connected to a plurality of data acquisition devices through a data processing device, and the data acquisition devices are respectively connected to the bidirectional DC / DC converter and the flexible regulation energy manager; characterized in that one end of the bidirectional DC / DC converter is connected to the branch of the cluster DC bus through a control switch, the DC bus at the other end of the bidirectional DC / DC converter is connected to the near-field multi-building optical storage direct soft system monitored by the flexible regulation energy management system, and the bidirectional DC / DC converter is also connected to an access controller, the access controller is interconnected with the control switch, at least one access end of the access controller is connected to the cluster DC bus, and at least one input end is connected to the near-field multi-building optical storage direct soft system.

[0024] Specifically, the cluster DC bus is connected to the bidirectional DC / DC converter through the DC contactor CZ. An access controller is connected in parallel at both ends of each bidirectional DC / DC converter. The access controller is interconnected with the DC contactor CZ to realize the on-off control of the control switch of the DC contactor CZ. More specifically, the access controller includes a voltage-regulating triode. The input ends of the voltage-regulating triode are respectively led out through a resistor R1 and a resistor R2 to form two access points as access terminals. The LED lamp and the resistor R3 connected in series at the output end of the voltage-regulating triode are connected to the control terminal of the thyristor Q2. The forward end of the thyristor Q2 is connected to the bidirectional DC / DC converter. The reverse end of the thyristor Q2 is grounded through a resistor R4, and a KM coil is also connected between the grounding end of the resistor R4 and the bidirectional DC / DC converter. The KM coil is interconnected with the DC contactor CZ. The load or socket interface of the near-field multi-building photovoltaic energy storage DC flexible system is connected to the DC bus led out by the bidirectional DC / DC converter. Further, the model of the voltage-regulating triode is the L7824 voltage-regulating triode.

[0025] Specifically, the DC bus of the near-field multi-building photovoltaic energy storage DC flexible system is connected to a photovoltaic system and an energy storage system. Moreover, the photovoltaic system, the energy storage system, and the load are all connected to the DC bus of the near-field multi-building photovoltaic energy storage DC flexible system through bidirectional DC / DC converters.

[0026] Working principle:

[0027] A near-field multi-building photovoltaic energy storage DC flexible system integrated control system and device can effectively manage and control the photovoltaic energy storage DC flexible system in a building, realize the optimal allocation and utilization of energy, improve the energy use efficiency, and at the same time ensure the stability and reliability of the system operation. Embodiment 2

[0028] On the basis of Embodiment 1, the load is powered by the photovoltaic system or / and the energy storage system, or the redundant electric energy on the cluster bus or the photovoltaic system is stored through the energy storage system. The cluster controller is interconnected with the flexible regulation energy manager through the communication module. The control device in the data communication device includes a control unit connected to the data acquisition device. The control unit includes a microprocessor or a PLC (programmable logic controller); the control unit receives the data from the data acquisition device; and according to the preset control strategy and algorithm, preliminarily processes and analyzes the data; the control device intelligently adjusts the operation state of the photovoltaic energy storage DC flexible system according to the real-time data to optimize the allocation and utilization of energy. The data communication module includes sensor communication devices and metering instrument communication devices. The control device in the data acquisition device is connected to the bidirectional DC / DC converter (bidirectional power converter) of each near-field multi-building photovoltaic energy storage DC flexible system and can control the disconnection of the subsystem from the cluster bus.

[0029] Working principle:

[0030] A near-field multi-building integrated control system for photovoltaic energy storage direct current and flexible power systems can effectively manage and control the photovoltaic energy storage direct current and flexible power systems in buildings, achieve optimal energy allocation and utilization, improve energy utilization efficiency, and ensure the stability and reliability of system operation. The utility model discloses an optimization of energy utilization efficiency: in the case of power self-sufficiency, the device preferentially ensures the power consumption requirements of each subsystem, and at the same time feeds back the excess power to the superior power grid; in the case of power shortage, the device preferentially utilizes distributed power generation and relies on the power grid to supply the remaining power load, maximizing energy utilization efficiency. Enhance system stability: when a certain subsystem fails or needs to be overhauled, the device can disconnect the connection with the cluster bus through the bidirectional DC / DC converter of the subsystem, avoiding affecting the operation of the entire system and ensuring the overall stability and safety of the system. Promote communication between subsystems: The technology and device achieve effective communication and coordination between each sub-photovoltaic energy storage direct current and flexible power system, ensuring the efficient operation of the overall system. Embodiment III

[0031] On the basis of Embodiment I or Embodiment II, as Figures 1-3 shown, a control method for a near-field multi-building integrated control system for photovoltaic energy storage direct current and flexible power systems:

[0032] Data communication and its control method: The installation location of the data communication device is as shown in the appendix Figure 1 shown, and the energy manager data of each sub-photovoltaic energy storage direct current and flexible power system is collected in real time, including but not limited to the building load data of the subsystem, distributed power generation (photovoltaic power generation, wind power generation, etc.) data, and energy storage device status data. These data will be collected by the data collection device and uploaded to the data processing device in real time to further achieve energy control and coordinated operation of each subsystem.

[0033] The near-field multi-building integrated control system for photovoltaic energy storage direct current and flexible power systems is interconnected with the DC cluster bus through bidirectional power converters respectively, that is, each individual building integrated control system for photovoltaic energy storage direct current and flexible power is connected to the DC cluster bus through a bidirectional power converter. The cluster controller is interconnected with the building integrated control system for photovoltaic energy storage direct current and flexible power through a communication module.

[0034] The control device in the data communication device mainly includes a control unit connected to the data collection device, such as a microprocessor or a PLC (programmable logic controller), which is responsible for receiving the data from the data collection device and performing preliminary processing and analysis on the data according to the preset control strategies and algorithms. The core function of the control device is to intelligently adjust the operation state of the integrated control system for photovoltaic energy storage direct current and flexible power according to the real-time data to optimize the energy allocation and utilization.

[0035] The data communication module includes sensor communication devices, metering instrument communication devices, but is not limited to the above two.

[0036] The control device within the data acquisition device is connected to the bidirectional DC / DC converters of each subsystem, and can control the disconnection of the subsystem from the cluster system (cluster bus) when necessary.

[0037] Data processing and its processing method:

[0038] The installation location of the data communication device is as shown in the attached drawings. It is responsible for collecting relevant data from the corresponding data acquisition devices of each sub-photovoltaic, energy storage, DC grid-connected, and flexible load system, including information provided by sensors and meters. This data provides a basis for the intelligent decision-making and optimal control of the system.

[0039] The data processor includes a server, network equipment, and database, but is not limited to these three.

[0040] Through facilities such as servers, network equipment, and databases, the collected data is analyzed and processed in real time, and control instructions are output to each subsystem.

[0041] Usage method of the connector between the subsystem and the cluster bus within the cluster system:

[0042] When a certain subsystem (or multiple subsystems) fails or is under maintenance, the device can disconnect the connection with the cluster bus through the bidirectional DC / DC converter of the subsystem, avoiding affecting the cluster system.

[0043] Working principle:

[0044] As Figures 1-3 shown, a near-field multi-building photovoltaic, energy storage, DC grid-connected, and flexible load system integrated control system can effectively manage and control the photovoltaic, energy storage, DC grid-connected, and flexible load system in the building, achieve the optimal allocation and utilization of energy, improve energy utilization efficiency, and at the same time ensure the stability and reliability of the system operation. The optimization of energy utilization efficiency disclosed in the present utility model: In the case of power self-sufficiency, the device preferentially ensures the power consumption requirements of each subsystem, and at the same time feeds the excess power back to the superior power grid; in the case of power shortage, the device preferentially utilizes distributed power generation and relies on the power grid to supply the remaining power load, maximizing energy utilization efficiency. Enhancing system stability: When a certain subsystem fails or needs to be maintained, the device can disconnect the connection with the cluster bus through the bidirectional DC / DC converter of the subsystem, avoiding affecting the operation of the entire system and ensuring the overall stability and safety of the system. Promoting communication between subsystems: This technology and device achieve effective communication and coordination between each sub-photovoltaic, energy storage, DC grid-connected, and flexible load system, ensuring the efficient operation of the overall system.

[0045] Based on the inspiration of the ideal embodiments of the present utility model, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A near-field multi-building integrated control system for a photovoltaic-storage-direct-current-flexible system, comprising: Several near-field multi-building photovoltaic energy storage DC-AC flexible systems; each near-field multi-building photovoltaic energy storage DC-AC flexible system is connected to the AC bus through a bidirectional AC / DC converter, and the near-field multi-building photovoltaic energy storage DC-AC flexible system is connected to the cluster DC bus through a bidirectional DC / DC converter; The cluster controller is connected to several data acquisition devices through a data processing device, and the data acquisition devices are respectively connected to the bidirectional DC / DC converter and the flexible regulation energy manager; it is characterized in that: one end of the bidirectional DC / DC converter is connected to the branch of the cluster DC bus through a control switch, the DC bus at the other end of the bidirectional DC / DC converter is connected to the near-field multi-building photovoltaic energy storage DC-AC flexible system monitored by the flexible regulation energy management system, and the bidirectional DC / DC converter is also connected to an access controller, the access controller is interconnected with the control switch, at least one access end of the access controller is connected to the cluster DC bus, and at least one input end is connected to the near-field multi-building photovoltaic energy storage DC-AC flexible system.

2. The integrated control system of a near-field multi-building optical storage direct-current flexible system according to claim 1, wherein: The cluster DC bus is connected to the bidirectional DC / DC converter through a DC contactor CZ.

3. The integrated control system of a near-field multi-building photovoltaic energy storage DC-AC flexible system according to claim 2, characterized in that: An access controller is connected in parallel at both ends of each bidirectional DC / DC converter, and the access controller is interconnected with the DC contactor CZ to realize the on-off control of the control switch of the DC contactor CZ.

4. The integrated control system of a near-field multi-building optical storage direct current flexible system according to claim 3, characterized in that: The access controller includes a voltage-stabilizing triode, the input end of the voltage-stabilizing triode respectively leads out two access ends as access points through a resistor R1 and a resistor R2, the LED lamp and the resistor R3 connected in series at the output end of the voltage-stabilizing triode are connected to the control end of the thyristor Q2, the forward end of the thyristor Q2 is connected to the bidirectional DC / DC converter, the reverse end of the thyristor Q2 is grounded through a resistor R4, and a KM coil is also connected between the grounding end of the resistor R4 and the bidirectional DC / DC converter, and the KM coil is interconnected with the DC contactor CZ.

5. The integrated control system of a near-field multi-building optical storage direct current flexible system according to claim 4, characterized in that: The load or socket interface of the near-field multi-building photovoltaic energy storage DC-AC flexible system is connected to the DC bus led out by the bidirectional DC / DC converter.

6. The integrated control system of a near-field multi-building optical storage direct current flexible system according to claim 5, characterized in that: The DC bus of the near-field multi-building photovoltaic energy storage DC-AC flexible system is connected to a photovoltaic system.

7. The integrated control system of a near-field multi-building optical storage direct current flexible system according to claim 6, characterized in that: The DC bus of the near-field multi-building photovoltaic energy storage DC-AC flexible system is connected to an energy storage system.

8. An integrated control system for a near-field multi-building photovoltaic energy storage direct current flexible system according to claim 7, characterized in that: The photovoltaic system, the energy storage system and the load are all connected to the DC bus of the near-field multi-building photovoltaic energy storage DC-AC flexible system through a bidirectional DC / DC converter.

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