DTU-based energy storage management and control method

Abstract

The invention relates to a DTU-based energy storage management and control method. The method comprises the following steps: firstly, allocating a slave address which can be identified by a DTU to equipment to be accessed to the DTU; then the DTU is powered on, the DTU searches and identifies the on-line slave device through the slave address, and after the on-line slave device is searched and identified, real-time field collection is carried out on the on-line slave device and collected real-time field information is transmitted to the monitoring platform; and finally, the monitoring platform judges according to the received real-time field information. When it is judged that the received real-time field information accords with a triggering collection starting condition, changing real-time field collection of the DTU into triggering field collection; the DTU collects trigger fields and transmits the collected trigger field information to the monitoring platform, and the monitoring platform judges the equipment state according to the received trigger field information and issues a corresponding instruction for operation and control. The system can be matched with different devices, can monitor in real time, and protects the safety of a station.

Description

Technical Field

[0001] The present invention relates to the application field of DTU, and in particular to a DTU-based energy storage control method. Background Art

[0002] DTU (Switch Terminal Equipment) is generally installed in conventional switchgear (stations), outdoor small switchgear, ring network cabinet, small substation, box substation, etc., to complete the collection and calculation of the position signal, voltage, current, active power, reactive power, power factor, electric energy and other data of the switchgear, and to perform the opening and closing operation of the switch to realize the fault identification, isolation and restoration of power supply to the non-fault section of the feeder switch; some DTUs also have the function of automatic input of protection and backup power supply, that is, the energy storage industry. Such DTUs are often used in some remote outdoor base stations, mainly composed of CPU control module, wireless communication module and power module. The equipment connected to it for energy storage mainly includes BMS combination battery, electric meter, air conditioner, etc. The data communication of DTU energy storage industry is based on 4G Internet of Things. The bottom layer monitors each BMS board (battery management system circuit board) and electric meter equipment, air conditioning equipment and other equipment in real time through modbus, and sends real-time collection data to the platform at the agreed time and responds to platform-related instructions in real time. However, in actual applications, since different brands and models use different BMS boards, the existing energy storage management and control using DTU cannot effectively identify and match equipment of different brands and models, and its use is limited. In addition, there is a delay in the rapid charging and discharging switching of the BMS board. For some remote locations or where people are not at the base station, real-time monitoring cannot be performed to protect the safety of the site. Summary of the invention

[0003] In view of the existing deficiencies, the present invention provides a DTU-based energy storage management and control method.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a DTU-based energy storage control method, the steps are as follows:

[0005] S1, assign a slave address that can be recognized by DTU to the device to be connected to DTU;

[0006] S2, power on the DTU, and the DTU finds and identifies the online slave device through the slave address. After finding and identifying the online slave device, the DTU collects the real-time field information of the online slave device and transmits the collected real-time field information to the monitoring platform;

[0007] S3, the monitoring platform makes a judgment based on the received real-time field information; when it is judged that the received real-time field information meets the conditions for starting trigger collection, the real-time field collection of DTU is changed to trigger field collection; DTU performs trigger field collection and transmits the collected trigger field information to the monitoring platform, and the monitoring platform judges the device status based on the received trigger field information and issues corresponding instructions for control.

[0008] Preferably, the real-time field collection is performed every 60 seconds, each collection time is 2-4 seconds and the collection starts at the 0th second of each minute.

[0009] Preferably, the trigger field acquisition is performed multiple times continuously, and each acquisition time is 3-5 seconds.

[0010] Preferably, the slave addresses are classified and set according to the device feature information of the device to be connected to the DTU and form an address database which is stored in the DTU.

[0011] Preferably, after power-on, the DTU polls the slave address of the address database by category and issues a read command. When a response is received, it is determined that the slave device is online, and the DTU performs real-time field acquisition on the online slave device.

[0012] Preferably, the fields collected by the real-time field collection and the triggered field collection are any one or more of voltage, current, electric quantity and temperature.

[0013] Preferably, the triggering condition for starting collection is that the real-time field information collected for multiple consecutive times exceeds a set threshold range.

[0014] Preferably, the instructions include an alarm instruction and / or a control instruction for the device when the trigger field information collected for multiple consecutive times exceeds a set threshold range, and an instruction to change the DTU field collection mode when the trigger field information collected for multiple consecutive times does not exceed the set threshold range.

[0015] Preferably, the DTU is provided with a storage unit.

[0016] Preferably, the DTU is further provided with a clock synchronization module.

[0017] The beneficial effects of the present invention are as follows: the present invention utilizes the allocation of slave addresses to different devices so that they can be converted into the self-defined fields of the DTU, and then the DTU automatically finds and identifies the connected online slave devices through the slave addresses, and can effectively adapt to different external devices. The real-time field collection and trigger field collection of the DTU can effectively monitor the status of the connected devices, and can also cut off the risks in real time in the event of abnormal alarms, which can effectively solve the safety of the site when people are not at the base station site. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the principle of an embodiment of the present invention; DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments below for a clear and complete description. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0020] Embodiments of the present invention Figure 1 As shown in the figure, a DTU-based energy storage control method has the following steps:

[0021] S1, assign a slave address that can be recognized by DTU to the device to be connected to DTU; at this time, the slave address is classified and set according to the device feature information of the device to be connected to DTU and forms an address database stored in DTU. The device feature information includes the brand, type, model, etc. of the device. Before each device is connected to the bus, that is, before connecting to DTU, the specified slave address range value is pre-assigned according to the type of device, and then for the same type of device, different brands and different models are assigned corresponding slave addresses in the corresponding slave address range from small to large. For example, a multi-digit number is used as the slave address of the device to be connected to DTU. If the assigned slave address range is a three-digit number, the hundreds digit is the number of the device type and the tens digit is the brand. The unit digit is the model number, so that all the products with the same hundreds digit belong to the same category, and the same tens digit are the same brand, and the units digit are different models of the same brand. For example, for BMS boards of the same brand but different models, the slave address can be assigned as follows. The starting value of the BMS board slave address is 214, BMS1 is preset to 214, BMS2 is preset to 215, BMS3 is preset to 216..... The starting value of the meter slave address starts from 10. If there are multiple meters, meter 1 is preset to 10, meter 2 is preset to 11, meter 3 is preset to 12.... And so on, air conditioners and other equipment also follow the same logic to assign slave addresses; after the slave address is assigned, an address database is stored in the DTU.

[0022] S2, power on the DTU, DTU finds and identifies online slave devices through slave addresses, and after finding and identifying online slave devices, collects real-time fields of online slave devices and transmits the collected real-time field information to the monitoring platform. The search and identification of online slave devices is that DTU polls the slave addresses of the address database by category after powering on and issues a read command. When a response is received, it is determined that the slave device is online, that is, after DTU is powered on, it will start polling and initiate a read command from the starting address according to the range value of the slave address of each major category. If a device response is received, it means that the current slave device is online, and then find and identify each online slave device. Finally, DTU collects real-time fields for each online slave device. The collected fields are any one or more of voltage, current, power and temperature, and the collected real-time field information is transmitted to the monitoring platform. At this time, the real-time field collection is carried out in a manner of collecting once every 60 seconds, each collection time is 2-4 seconds, and the collection starts at the 0th second of each minute. For example, 3 seconds of field information is collected each time, and the collection starts at the 0th second of each minute. The collected real-time data is transmitted to the monitoring platform.

[0023] S3, the monitoring platform makes a judgment based on the received real-time field information; when it is judged that the received real-time field information meets the conditions for starting the trigger collection, the real-time field collection of the DTU is changed to the trigger field collection. When the conditions for starting the trigger collection are not met, the real-time field collection mode is maintained; the fields collected by the trigger field collection are the same as the real-time field collection, and are any one or more of voltage, current, power and temperature, such as the charging and discharging voltage, current and cell voltage, cell temperature, SOC and other fields of each BMS board; the real-time current, voltage and power value of the meter; the return air temperature of the air conditioner; the trigger field collection is carried out for multiple consecutive collections, each collection time is 3-5 seconds, and the real-time field collection is restored when the trigger field information collected for multiple consecutive times does not exceed the set threshold range; the DTU performs trigger field collection and transmits the collected trigger field information to the monitoring platform, and the monitoring platform collects the trigger field information based on the received The received trigger field information determines the device status and issues corresponding instructions for control. The device status is determined based on the trigger field information for multiple consecutive times. For example, three times in a row, when the trigger field information collected for multiple consecutive times exceeds the set threshold range, the alarm instruction and / or the control instruction for the device are issued. At this time, it means that there is a problem with the online slave device connected to the DTU. The instruction issued at this time is an alarm instruction for alarm, or a control instruction to directly power off or stop the online slave device, or the alarm instruction and the control instruction are issued at the same time. After receiving the instruction, the DTU will perform corresponding control on the online slave device. When the alarm instruction appears, the DTU and the monitoring platform will alarm at the same time; at the same time, when the trigger field information collected for multiple consecutive times does not exceed the set threshold range, the trigger field collection will issue a change instruction for the DTU field collection mode, that is, the trigger field collection will be changed to the real-time field collection. The trigger collection condition is that the real-time field information collected for multiple consecutive times exceeds the set threshold range, such as the trigger field collection starts when the real-time field information collected for three consecutive times exceeds the threshold range.

[0024] As a further improvement, the DTU is provided with a storage unit, which can store the corresponding information in the DTU itself while transmitting the field information to the monitoring platform, so as to facilitate subsequent tracking and viewing. At the same time, the DTU is also provided with a clock synchronization module, which can synchronize the time of the slave device, and the clock synchronization module is implemented by using a clock generation circuit and a clock synchronization protocol. The clock generation circuit and the clock synchronization protocol are both existing technologies and will not be elaborated in detail here, such as the IEEE1588 protocol, the IEEE 802.1AS protocol, etc.

[0025] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A DTU-based energy storage control method, characterized in that: Here are the steps: S1, assign a slave address that can be recognized by DTU to the device to be connected to DTU; S2, power on the DTU, and the DTU finds and identifies the online slave device through the slave address. After finding and identifying the online slave device, the DTU collects the real-time field information of the online slave device and transmits the collected real-time field information to the monitoring platform; S3, the monitoring platform makes a judgment based on the received real-time field information; When it is determined that the received real-time field information meets the conditions for starting trigger collection, the real-time field collection of the DTU is changed to trigger field collection; the DTU performs trigger field collection and transmits the collected trigger field information to the monitoring platform, and the monitoring platform determines the device status based on the received trigger field information and issues corresponding instructions for control.

2. According to the DTU-based energy storage control method of claim 1, it is characterized in that The real-time field collection is performed every 60 seconds, each collection time is 2-4 seconds and starts at the 0th second of each minute.

3. According to the DTU-based energy storage control method of claim 1, it is characterized in that : The trigger field acquisition is performed multiple times continuously, and each acquisition time is 3-5 seconds.

4. The DTU-based energy storage control method according to claim 1 is characterized in that : The slave address is classified and set according to the device feature information of the device to be connected to the DTU and forms an address database stored in the DTU.

5. The DTU-based energy storage control method according to claim 4 is characterized in that : After power-on, the DTU polls the slave address of the address database by category and issues a read command. When a response is received, it is determined that the slave device is online, and the DTU performs real-time field collection on the online slave device.

6. The DTU-based energy storage control method according to claim 1 is characterized in that : The fields collected by the real-time field collection and the triggered field collection are any one or more of voltage, current, power and temperature.

7. The DTU-based energy storage control method according to claim 1 is characterized in that The triggering condition for starting the collection is that the real-time field information collected for multiple consecutive times exceeds the set threshold range.

8. According to claim 1, the DTU-based energy storage device control method is characterized in that : The instructions include an alarm instruction and / or a control instruction for the device when the trigger field information collected by the trigger field collection for multiple consecutive times exceeds the set threshold range, and an instruction to change the DTU field collection mode when the trigger field information collected by the trigger field collection for multiple consecutive times does not exceed the set threshold range.

9. The DTU-based energy storage control method according to claim 1 is characterized in that : The DTU is provided with a storage unit.

10. The DTU-based energy storage control method according to claim 1 is characterized in that : The DTU is also provided with a clock synchronization module.

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