CN117032066A - PLC control method of mobile energy storage system - Google Patents
PLC control method of mobile energy storage system Download PDFInfo
- Publication number
- CN117032066A CN117032066A CN202311294332.0A CN202311294332A CN117032066A CN 117032066 A CN117032066 A CN 117032066A CN 202311294332 A CN202311294332 A CN 202311294332A CN 117032066 A CN117032066 A CN 117032066A
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- energy storage
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- mobile energy
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- 238000004146 energy storage Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 11
- 230000003993 interaction Effects 0.000 claims abstract description 9
- 230000000875 corresponding effect Effects 0.000 claims abstract description 7
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000006870 function Effects 0.000 abstract description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
Abstract
The invention discloses a PLC control method of a mobile energy storage system, and relates to the technical field of mobile energy storage. The invention controls the whole mobile energy storage system through the PLC, which comprises the steps of adopting the PLC to communicate with a human-computer interaction screen HMI, a remote I/O module, an energy storage converter, a battery management system, a bidirectional electric energy meter, an air conditioner and fire control, and collecting data; performing internal program operation by reading the collected various data, and then issuing the data to each device to execute corresponding actions; the real-time data of each device are read through the energy storage converter and displayed on the human-machine interaction screen HMI. The mobile energy storage method based on PLC control provided by the invention has the advantages of high reliability, strong anti-interference capability, complete matching, perfect functions, strong practicability, easy learning and understanding of programming language, more convenient later maintenance, and most of communication protocols are mainstream bus standard protocols, and is suitable for large-scale popularization and use.
Description
Technical Field
The invention relates to the technical field of mobile energy storage, in particular to a PLC control method of a mobile energy storage system.
Background
Most of the existing mobile energy storage systems adopt integrated circuit systems developed by taking a singlechip as a core, and the energy mobilization of the system is realized by carrying developed EMS control software, so that the system has the characteristics of high integration level, small volume and lower cost;
however, the system has the defects of poor expansibility and general compatibility, and also has the defects of poor environmental adaptability, anti-interference performance, shock resistance and the like, and the running stability is often poor; therefore, we propose a PLC control method of the mobile energy storage system.
Disclosure of Invention
The invention aims to provide a PLC control method of a mobile energy storage system, which has the characteristic of high stability, and adopts a standard industrial bus protocol to apply the PLC to mobile energy storage or fixed energy storage.
The invention is realized by the following technical scheme:
the invention relates to a PLC control method of a mobile energy storage system, which controls the whole mobile energy storage system through a PLC and comprises the following steps:
s1: adopting a PLC to communicate with a human-computer interaction screen HMI, a remote I/O module, an energy storage converter, a battery management system, a bidirectional electric energy meter, an air conditioner and fire control, and collecting data;
s2: performing internal program operation by reading the collected various data, and then issuing the data to each device to execute corresponding actions;
s3: the real-time data of each device are read through the energy storage converter and displayed on the human-machine interaction screen HMI.
And the S1 also comprises a voltage sensor and a current transformer, and current voltage and power data of the system are obtained through the voltage sensor and the current transformer which are connected with the bidirectional electric energy meter.
The PLC is communicated with the BMS through protocol conversion Modbus-TCP/can to read the total voltage and current and SOC data of the current battery, and the method further comprises the steps of reading the voltage and temperature data of each battery core, triggering the opening and closing of an air conditioner, controlling the fire protection of the system and controlling the operation of the system to stop.
In the step S2, the PLC performs program operation according to the mode function of the application scene by obtaining the AC/DC data of the system, so as to control the energy storage converter to charge and discharge the system.
The PLC controls the remote I/O module to receive an external dry contact signal and controls the opening and closing of the AC/DC circuit breaker, so that the aim of remote starting is fulfilled, and meanwhile, the remote I/O module is connected with an alarm operation indicator lamp of the energy storage system.
The PLC packages the collected data and the running information of the system to the HMI through an RS232 or RS485 communication protocol, displays the running state, the running time and the running mode of the current system on the HMI, checks the alarm fault information and the corresponding time, and inquires the specific data of each piece of sub-equipment;
the PLC packs the data through communication with each device and then transmits the data to the cloud end through the RS485 communication protocol, so that the platform end can monitor the running state of the energy storage system and the later operation and maintenance conveniently.
The invention has the following beneficial effects:
the PLC control method of the mobile energy storage system adopts the PLC with mature market and wider application range as the control terminal of the energy storage system, and utilizes the strong environmental adaptability and universality of the PLC and the strong stability and standard industrial bus protocol to ensure that the PLC is very suitable for mobile energy storage and application in severe environments.
According to the PLC control method of the mobile energy storage system, the fire protection, air conditioning, PCS, BMS and the bidirectional electric energy meter in the energy storage system are read through PLC control, data collection and issuing of each unit are achieved, operation real-time data of the lithium battery cell are mastered, stable operation in a severe environment can be achieved, protection can be achieved at the first time when abnormality occurs, and an alarm can be given.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a PLC control method of a mobile energy storage system of the present invention;
FIG. 2 is a diagram of a PLC control system of the mobile energy storage system of the present invention;
fig. 3 is a schematic diagram illustrating an application of PLC control of the mobile energy storage system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the PLC control method of the mobile energy storage system of the present invention controls the whole mobile energy storage system through a PLC, and the PLC communicates with a human-computer interaction screen HMI, a remote I/O module, an energy storage converter (PCS), a Battery Management System (BMS), a bidirectional electric energy meter, etc., an air conditioner, fire protection, etc., performs internal program operation by reading collected various data, and then issues the data to each device to perform corresponding actions, and real-time data of each device is read through the PCS and displayed on the HMI.
As shown in fig. 2, the current voltage and power data of the system can be obtained through the voltage sensor and the current transformer connected with the bidirectional electric energy meter;
in the control system of FIG. 2, the PACK is a battery module, which is formed by serial and parallel connection of single battery cells, the GO1-GON is a cluster formed by serial connection of PACK modules, the BCU is a single battery cluster battery management system, the BMS is a multi-cluster battery management system, the Q1 is a battery cluster direct current breaker, the Q2 is an alternating current side breaker, the PLC is an editable logic controller, the I/O module is the digital input and output of the PLC, the bidirectional metering ammeter is the sampling of the voltage and current power of the system, the HMI is the man-machine interaction and display of the system, the indicator lamp is used for displaying the running state of the system, the DTU is a 4G wireless transparent transmission module for transmitting the local data to the cloud,
the connection mode is as follows: the battery PACK is connected in series to form a cluster, a plurality of clusters adopt a direct current parallel connection mode, a direct current breaker is connected to an energy storage system PCS, a BMU (primary management system) sampling module is arranged in the battery PACK, the battery PACK is communicated to a BCU (secondary management system) through CAN, the plurality of BCUs transmit data to the BMS (tertiary management system), the BMS packages and transmits the monitored data to a PLC, the PLC reads equipment such as an air conditioner, fire protection, bidirectional metering, an indicator lamp and the like on the mobile energy storage system through RS485 communication to acquire information to the interior of the PLC for program processing, the start and stop of the air conditioner CAN be controlled through the read data, the I/O module is controlled to close the direct current breaker Q1 through PROFINET communication, and then the PCS is started through communication control PCS after the direct current side is electrified;
the control system uses the PLC to control the movable energy storage, the stability is greatly improved, the protocols are all industry standard bus protocols, the applicability and the universality are good, the method is suitable for large-scale popularization, the system flow operation is simpler, and the one-key starting effect can be achieved.
According to the PLC (programmable logic controller) control method of the mobile energy storage system, the PLC can read the data such as the total voltage current, the SOC and the like of the current battery through communication between Modbus-TCP/can and the BMS, and can also read the voltage, the temperature and the like of each battery core, so that the opening and the closing of an air conditioner are triggered, and the operation of a system fire protection and control system is stopped; the PLC performs program operation according to the mode function of an application scene by obtaining AC/DC data of the system so as to control an energy storage converter (PCS) to charge and discharge the system; meanwhile, the PLC remote I/O module receives an external dry contact signal (such as fire control) and controls the opening and closing of the AC/DC circuit breaker, so that the remote starting effect is achieved, and an alarm operation indicator lamp of the energy storage system can be connected, so that the operation condition of equipment can be observed on site by operation and maintenance personnel conveniently;
in addition, the PLC (programmable logic controller) packages the collected data and the running information of the system to the HMI through an RS232/RS485 communication protocol, the running state, the running time and the running mode of the current system can be displayed on the HMI, alarm fault information and corresponding time can be checked, and specific data of each piece of sub-equipment can be queried; data are packaged through communication between the PLC and each device and then are transmitted to the cloud through the DTU (4G wireless transparent transmission module) through RS485 communication, and the platform end can conveniently monitor the running state of the energy storage system and the operation and maintenance of the later stage.
As shown in fig. 3, the system is controlled by a PLC (programmable logic controller) as a core, and comprises an energy storage converter (PCS), a Battery Management System (BMS), fire protection, air conditioning, human-computer interaction (HMI), an I/O module, a bidirectional metering ammeter and the like, and the system can be applied to mobile energy storage and industrial and commercial energy storage scenes because the PLC has extremely high versatility reliability and anti-interference performance, and is suitable for large-scale popularization.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. The PLC control method of the mobile energy storage system is characterized by controlling the whole mobile energy storage system through a PLC, and comprises the following steps:
s1: adopting a PLC to communicate with a human-computer interaction screen HMI, a remote I/O module, an energy storage converter, a battery management system, a bidirectional electric energy meter, an air conditioner and fire control, and collecting data;
s2: performing internal program operation by reading the collected various data, and then issuing the data to each device to execute corresponding actions;
s3: the real-time data of each device are read through the energy storage converter and displayed on the human-machine interaction screen HMI.
2. The PLC control method of a mobile energy storage system according to claim 1, wherein the S1 further comprises a voltage sensor and a current transformer, and the current voltage and power data of the system are obtained through the voltage sensor and the current transformer connected to the bidirectional electric energy meter.
3. The PLC control method of a mobile energy storage system according to claim 1, wherein the PLC reads the total voltage and current and SOC data of the current battery by communicating with the BMS through protocol conversion Modbus-TCP/can, and further includes reading the voltage and temperature data of each battery cell, triggering the on/off of the air conditioner, controlling the fire protection of the system, and controlling the operation of the system to stop.
4. The PLC control method of a mobile energy storage system according to claim 1, wherein in S2, the PLC performs a program operation according to a mode function of an application scenario by obtaining ac/dc data of the system, so as to control the energy storage converter to perform charging and discharging of the system.
5. The PLC control method of a mobile energy storage system according to claim 1, wherein the PLC controls the remote I/O module to receive an external dry contact signal and control the switching on/off of the ac/dc circuit breaker, thereby achieving the purpose of remote power on, and simultaneously accessing an alarm operation indicator lamp of the energy storage system.
6. The PLC control method of a mobile energy storage system according to claim 1, wherein the PLC packages the collected data and the operation information of the system to the HMI through an RS232 or RS485 communication protocol, displays the current operation state, operation duration and operation mode of the system on the HMI, checks the alarm fault information and the corresponding time, and simultaneously inquires the specific data of each sub-device.
7. The method for controlling the PLC of the mobile energy storage system according to claim 1, wherein the PLC packages data through communication with each device and then transmits the data to the cloud through the wireless terminal DTU through an RS485 communication protocol, so that a platform end can monitor the running state of the energy storage system and the later operation and maintenance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311294332.0A CN117032066A (en) | 2023-10-09 | 2023-10-09 | PLC control method of mobile energy storage system |
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| CN202311294332.0A CN117032066A (en) | 2023-10-09 | 2023-10-09 | PLC control method of mobile energy storage system |
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