Virtual interface-based energy storage programmable control system and method

Abstract

The invention relates to the technical field of energy storage control, in particular to an energy storage programmable control system and method based on a virtual interface. The system comprises a master controller, a field controller and a station controller, and the master controller, the field controller and the station controller are respectively communicated through optical fibers. By adopting a hierarchical design scheme, general control, field control and station control are interconnected and intercommunicated, so that the requirements of overall arrangement and overall scheduling are met, the capacity expansion of the system is more convenient, and a large-capacity, super-volume and wide-area energy storage control system is easy to establish. Through application of the virtual interface technology, standardized processing of equipment access is realized, free combination and rapid butt joint of equipment can be realized according to actual business volume, different equipment market prices, market shares and the like, the equipment is not limited by equipment models any more, and binding sales of manufacturers is avoided, so that the degree of freedom is improved, and the system cost is reduced. The current situation that after a traditional energy storage system is delivered, control logic is solidified and cannot be adjusted autonomously, and equipment addition, deletion, modification and replacement need to be customized and developed is changed, and the system is more flexible and variable in use.

Description

Technical Field

[0001] The present invention relates to the field of programming control technology, and in particular to a virtual interface-based energy storage programmable control system and method. Background Art

[0002] Energy storage technology is one of the most critical technologies for the development of new energy. It can eliminate the difference between peak and valley power, realize the smooth output of new energy such as photovoltaic and wind power, peak and frequency regulation and spare capacity, and become an important means to solve the balance of energy supply and demand and improve energy utilization efficiency. Similarly, peripheral equipment related to energy storage, such as PCS, BMS, access control, fire protection, air conditioning, etc., is also growing and developing, with more and more types, and the diversity of the combination of related equipment is richer. How to quickly carry out optimization measures such as adding, deleting, changing and replacing equipment to maximize benefits requires a relatively complete solution; in addition, with the continuous advancement of technology, the capacity of energy storage systems is also constantly increasing, and its distributed characteristics are becoming increasingly prominent. There is an urgent need for a reasonable system architecture to solve problems such as rapid implementation, efficient operation and maintenance, overall arrangement, and reasonable scheduling.

[0003] Traditional energy storage control system docking equipment has great limitations and cannot meet the rapid development of current new energy storage systems. In addition, the access equipment and process control logic are generally solidified internally when leaving the factory. If dynamic adjustments are required during the process, the source code needs to be changed and the firmware needs to be updated. In addition, the equipment selection is relatively limited, the system expansion is more difficult, the cycle is long, the efficiency is low, and the cost is high. Summary of the invention

[0004] Once a traditional energy storage control system is deployed and implemented, the on-site control logic and the devices that can be connected are fixed. For later adjustments, only R&D personnel can intervene to carry out customized product development by modifying codes, updating firmware, etc. The present invention provides a programmable energy storage control system and method based on a virtual interface.

[0005] In a first aspect, the present invention provides a virtual interface energy storage programmable control system, which adopts the following technical solution: A programmable control system for energy storage based on a virtual interface, comprising: The main control, field control and station control communicate with each other through optical fiber; the main control is used to monitor the operating status of the entire system and process scheduling control; the field control is used to manage and control various types of station controls, and upload corresponding data to the main control, and receive scheduling instructions issued by the main control; the station control is used to connect to various types of equipment, execute process control logic, and perform online debugging.

[0006] Furthermore, the master control includes a master control server, and the master control server is connected to a master control database and a firewall respectively.

[0007] Furthermore, the field control includes a plurality of field control consoles, which are respectively connected to the field control database and the field control operator station. Furthermore, the station control includes an independently operated energy storage cabinet, and the energy storage cabinet is composed of EMS, PCS, BMS and peripheral equipment.

[0008] Furthermore, the station control also includes various virtual boards, and the virtual boards include different channels for docking device parameters.

[0009] In a second aspect, a programmable control method for energy storage based on a virtual interface includes: Configure the logic algorithm blocks in the station; According to the control logic on site, select the corresponding logic algorithm block for online compilation; The constructed process control logic is sent to various devices using virtual interfaces.

[0010] Furthermore, configuring the logic algorithm block in the station includes configuring the logic algorithm block including a time function, a control function, an input / output function, a selection function, a logic function and a mathematical algorithm in the station.

[0011] Furthermore, the method selects corresponding logic algorithm blocks for online compilation according to the control logic on site, including selecting corresponding logic algorithm blocks according to the control logic on site, and combining the input and output and process control connections in combination with the configuration of the virtual board, building the process control logic, and performing online compilation of the control logic according to preset constraints.

[0012] Furthermore, the compiled logic algorithm block is sent to various devices using a virtual interface, including configuring a virtual board for the station control through the field control, each virtual board contains a specific number of channels, and each channel corresponds to a data actually accessed.

[0013] Furthermore, the field control configures the virtual board for the station control, including adding the station control and selecting the corresponding station control to add the virtual board, adding the virtual board according to the actually connected equipment and process data, and then configuring the channel for each virtual board to complete the equipment access.

[0014] In summary, the present invention has the following beneficial technical effects: 1. The application of virtual interface technology realizes the standardized processing of device access. It can be freely combined according to the actual business volume, market price and market share of different devices, and quickly connect devices. It is no longer restricted by device models and avoids manufacturer-bound sales, thereby increasing freedom and reducing system costs.

[0015] 2. It has changed the status quo that after the delivery of traditional energy storage systems, the control logic is solidified and cannot be adjusted independently, and the addition, deletion, and replacement of equipment all require customized development. The system is more flexible and variable.

[0016] 3. The system adopts a hierarchical design scheme, with the master control, field control, and station control interconnected to meet the needs of overall planning and overall dispatch. The system is more convenient to expand and it is easy to build a large-capacity, ultra-volume, and wide-area energy storage control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a hierarchical control system of an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of a programmable control method based on virtual interface energy storage according to an embodiment of the present invention. Figure 3 It is a schematic diagram of a device access method based on a virtual interface according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] Example 1 Reference Figure 1 A programmable control system based on virtual interface energy storage in this embodiment includes master control, field control, and station control; the master control is used to monitor the operating status and process scheduling control of the entire system; the field control manages various types of station controls, and uploads corresponding data to the master control, and at the same time receives various types of scheduling instructions issued by the master control, dynamically adjusts the station control logic, and the inter-station collaborative operation logic, and coordinates the scheduling of station controls; the station control includes various types of virtual boards to connect to various types of equipment, and executes process control logic at the same time, and supports online debugging and other functions.

[0021] The system supports the dynamic addition and deletion of station control, as well as the dynamic addition and deletion of virtual boards within the station control. After the content is changed, only database synchronization is required, so as to cope with the addition, modification and replacement of different types of equipment, as well as subsequent optimization and upgrades.

[0022] Virtual boards include analog input, analog output, digital input, and digital output. Each type of virtual board contains different channels to connect device parameters; virtual boards have no actual meaning, they are just data input and output; the communication process is addressed according to the virtual board type, address, and channel; virtual boards are dynamically configured according to actual functional requirements.

[0023] The various protocols, interfaces and types of equipment in the energy storage system are divided according to control parameters and virtualized into different board data. According to the interface protocol, the equipment data is mapped to the board in the agreed format to complete the collection of equipment data.

[0024] like Figure 1 As shown, The energy storage control system is designed using a layered design and hierarchical cascading approach. The basic components of the system include master control, field control, and station control. Each part communicates through optical fiber dedicated lines, wired networks, 4G / 5G wireless communications, etc., and corresponding communication protocol standards are planned and formulated to ensure the interconnection of each part and the security and stability of the data.

[0025] The master control is the core part of the energy storage control system. Its main functions include real-time monitoring of the operation of the entire energy storage system, statistical analysis of the operation efficiency of the energy storage system, receiving grid dispatching instructions, and forming dispatching strategies for each station, and coordinating and controlling the entire energy storage system. In terms of control scope, the master control is a regional control, which controls various energy storage systems connected to the master control in the region. Each energy storage system is uniformly dispatched and operated by the master control to ensure the stability and reliability of the regional power grid while achieving the maximum energy storage benefits in the region.

[0026] Field control is the middle link of the entire energy storage control system. It connects to each station control through wired means and maintains interconnection with the master control through dedicated lines or wireless communications such as 4G / 5G. At the same time, field control supports the virtual interface configuration of each station control, builds process control logic through logical control components, and sends it to the corresponding station control. At the same time, it can debug each station control device online and display the control logic and the operating status of the virtual board in a graphical way. It has functions such as alarm system, report system, curve trend, system synchronization, station control logic clearing, equipment restart, etc.

[0027] The station control is each independently operated energy storage cabinet, the lowest execution unit in the entire system, and is composed of EMS, PCS, BMS and peripheral equipment. According to the control logic and virtual device interface issued by the field control, data collection, calculation, and control are performed. Through a specific interface, process operation information is fed back in real time and the received dispatch instructions are executed.

[0028] Example 2. This embodiment provides a programmable energy storage control method, such as Figure 2 As shown, including the following: This method can be used to complete the design of the process control logic of the station control system and online debugging in the field control system. The field control and station control process logics can be downloaded and uploaded for synchronization, which completely changes the problems of the original control system's solidified control logic and inability to debug online.

[0029] The implementation method of the programmable energy storage control system is to deploy it in the field station, with built-in various logic control algorithms, such as time control, PID regulation, integral calculation, differential calculation, step response, input and output, median selection, maximum selection, alarm module and other logic algorithm blocks. According to the major categories, it can be subdivided into: time function, control function, input and output function, selection function, logic function, mathematical algorithm and other major categories.

[0030] According to the on-site control logic, select the corresponding logic algorithm block, combine the configuration of the virtual board, connect and combine the input and output and process control, build the process control logic, and support online compilation of the control logic according to specific constraints to ensure the correctness and compliance of the process logic.

[0031] The process control logic supports online debugging. By setting the corresponding input information, adjusting the algorithm block parameters, and monitoring the output information or the equipment operation status, the correctness of the process control logic can be monitored. The process control algorithm logic supports multi-page drawing, and can also be quickly viewed and debugged by switching pages.

[0032] The process control logic supports the modification and adjustment of compiled algorithms. It only needs to be issued through the station control logic in the field control system to update the control logic of the corresponding station control and realize remote upgrading.

[0033] like Figure 3 FIG. 1 is a device access method based on a virtual interface.

[0034] Among them, the main implementation process of the device access method based on the virtual interface is as follows: 1. The device access method based on virtual interface is deployed and implemented in the field control. It mainly virtualizes various boards inside the subordinate station control, including analog input, analog output, digital input, digital output and reference between station control, which are used for data collection of access equipment and output of control quantity after logical calculation. Each board has corresponding address information and configuration attributes of sampling time interval. Each station control can add 128 virtual boards and support up to 2048 point information, and the field station can support 64 groups of station control information configuration to meet the application requirements of large-capacity energy storage systems.

[0035] 2. Each virtual board contains a specific number of channels. Each channel corresponds to a piece of data of the actual connected device. The type of virtual board corresponds to the input and output data of the device. The same type of data is placed in the same virtual board. According to the type, parameters, functions, protocols, etc. of the access device data, the channel information is configured, including address information, index information, alarm status, data processing methods, etc., and the channel information is configured in the corresponding station control system to form a virtual processing process of the real physical device, decoupling the top-level control logic from the actual physical device to improve the device access capability.

[0036] 3. The entire adding method is to first add the station control, then select the corresponding station control to add the virtual board, add the virtual board according to the actual connected equipment and process data, and after adding the corresponding virtual board, configure the channel for each virtual board to complete the device access.

[0037] The system will control the device according to the set sampling period or control period, and also supports forced output of the device, that is, forcing a certain information of the control device to be output to a specified state, so as to verify whether the device is normal or verify the correctness of the process control logic.

[0038] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A programmable control system for energy storage based on a virtual interface, characterized in that: include: The main control, field control and station control communicate with each other through optical fiber; the main control is used to monitor the operating status of the entire system and process scheduling control; the field control is used to manage and control various station controls, and upload corresponding data to the main control, and receive scheduling instructions issued by the main control; the station control is used to connect to various devices, execute process control logic, and perform online debugging.

2. A virtual interface energy storage programmable control system according to claim 1, characterized in that: The master control includes a master control server, and the master control server is connected to a master control database and a firewall respectively.

3. A virtual interface energy storage programmable control system according to claim 2, characterized in that: The field control includes a plurality of field control consoles, and the field control consoles are respectively connected to a field control database and a field control operator station.

4. A virtual interface energy storage programmable control system according to claim 3, characterized in that: The station control includes an independently operated energy storage cabinet, which is composed of EMS, PCS, BMS and peripheral equipment.

5. A virtual interface energy storage programmable control system according to claim 4, characterized in that: The station control also includes various virtual boards, and the virtual boards include different channels for docking device parameters.

6. A programmable control method for energy storage based on a virtual interface, characterized in that: include: Configure the logic algorithm blocks in the station; According to the control logic on site, select the corresponding logic algorithm block for online compilation; The constructed process control logic is sent to various devices using virtual interfaces.

7. A method for programmable control of energy storage based on virtual interface according to claim 6, characterized in that: The configuring of the logic algorithm block in the station includes configuring the logic algorithm block including time function, control function, input and output function, selection function, logic function and mathematical algorithm in the station.

8. A method for programmable control of energy storage based on virtual interface according to claim 7, characterized in that: The method of selecting corresponding logic algorithm blocks for online compilation according to the control logic on site includes selecting corresponding logic algorithm blocks according to the control logic on site, and combining the input and output and process control connections in combination with the configuration of the virtual board, building the process control logic, and performing online compilation of the control logic according to preset constraints.

9. A method for programmable control of energy storage based on virtual interface according to claim 8, characterized in that: The compiled logic algorithm blocks are sent to various devices using virtual interfaces, including configuring virtual boards for station control through field control, each virtual board contains a specific number of channels, and each channel corresponds to a piece of data actually accessed.

10. A method for programmable control of energy storage based on virtual interface according to claim 9, characterized in that: The field control configures the virtual board for the station control, including adding the station control and selecting the corresponding station control to add the virtual board, adding the virtual board according to the actually connected equipment and process data, and then configuring the channel for each virtual board to complete the equipment access.

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