Energy storage converter safety monitoring system based on double controllers

Abstract

The utility model provides an energy storage converter safety monitoring system based on double controllers, which relates to the technical field of power electronics and comprises a first controller, a second controller, a safety monitoring module, a battery management system, an intelligent charging and discharging module, a plurality of sensors, a plurality of field control units, a state evaluation module and a remote monitoring center. Wherein the first controller is respectively connected with the second controller, the safety monitoring module, the battery management system and the intelligent charging and discharging module; the second controller is respectively connected with a plurality of field control units, a state evaluation module and a remote monitoring center; each sensor is connected with at least one field control unit. According to the utility model, by designing a double-controller architecture, real-time state evaluation of the energy storage converter and real-time control of the battery pack can be considered at the same time, so that more comprehensive technical guarantee is provided for safe and stable operation of the energy storage converter, and the practicability is strong.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, especially, it relates to a kind of energy storage converter safety monitoring system based on double controller. BACKGROUND

[0002] In new energy power generation system, electrochemical energy storage system is used to store and release energy to balance power output, enhance the stability of power grid. Network type electrochemical energy storage converter as a kind of electrochemical energy storage system, is the core device of new energy power generation system, and it needs to work under high load and high overload condition for a long time, so it is particularly necessary to carry out safety monitoring. But the existing monitoring system can only collect basic parameters, cannot evaluate safety state, and the practicality is poor. UTILITY MODEL CONTENT

[0003] The utility model embodiment aims at providing a kind of energy storage converter safety monitoring system based on double controller, can simultaneously give consideration to the real-time state evaluation of energy storage converter and the real-time control of battery pack, to provide more comprehensive technical guarantee for the safe and stable operation of energy storage converter, and the practicality is strong.

[0004] To achieve the above object, the utility model embodiment provides an energy storage converter safety monitoring system based on double controller, comprising first controller, second controller, safety monitoring module, battery management system, intelligent charge-discharge module, a plurality of sensors, a plurality of field control units, state evaluation module and remote monitoring center, wherein:

[0005] The first controller is connected with the second controller, the safety monitoring module, the battery management system and the intelligent charge-discharge module respectively;

[0006] The second controller is connected with the plurality of field control units, the state evaluation module and the remote monitoring center respectively;

[0007] Each sensor is connected with at least one field control unit.

[0008] As the improvement of the above scheme, the safety monitoring module includes solid-state relay and opto-coupler isolation circuit, and the solid-state relay and the opto-coupler isolation circuit are connected with the first controller respectively.

[0009] As the improvement of the above scheme, the intelligent charge-discharge module includes MOSFET switch control circuit and equalization charging circuit, and the MOSFET switch control circuit and the equalization charging circuit are connected with the first controller respectively, and the MOSFET switch control circuit and the equalization charging circuit are connected with battery monomer respectively.

[0010] As an improvement of the above-mentioned scheme, the first controller is further connected to the semiconductor power device inside the energy storage converter.

[0011] As an improvement of the above-mentioned scheme, the double-controller-based energy storage converter safety monitoring system further comprises an operator workstation and a communication module, and the operator workstation is connected to the second controller through the communication module.

[0012] As an improvement of the above-mentioned scheme, the sensors comprise current sensors, voltage sensors and temperature sensors.

[0013] As an improvement of the above-mentioned scheme, the current sensors are Hall effect current sensors, the voltage sensors are ferrite capacitor sensors, and the temperature sensors are NTC thermistors.

[0014] As an improvement of the above-mentioned scheme, the first controller is a programmable logic controller.

[0015] Compared with the prior art, the double-controller-based energy storage converter safety monitoring system provided by the embodiments of the present application comprises a first controller, a second controller, a safety monitoring module, a battery management system, an intelligent charging and discharging module, a plurality of sensors, a plurality of field control units, a state evaluation module and a remote monitoring center, wherein the first controller is connected to the second controller, the safety monitoring module, the battery management system and the intelligent charging and discharging module respectively; the second controller is connected to the plurality of field control units, the state evaluation module and the remote monitoring center respectively; and each of the sensors is connected to at least one of the field control units. The double-controller architecture can simultaneously consider the real-time state evaluation of the energy storage converter and the real-time control of the battery pack, thereby providing more comprehensive technical support for the safe and stable operation of the energy storage converter, and the step-by-step architecture is adopted to collect the data of the energy storage converter, so that the parallel collection of data is supported, and the fault tolerance of the system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic view of a double-controller-based energy storage converter safety monitoring system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] Referring to Figure 1 The utility model embodiment provides a kind of energy storage converter safety monitoring system based on double controller, including first controller 1, second controller 2, safety monitoring module 3, battery management system 4, intelligent charge-discharge module 5, several sensors 6, several field control units 7, state evaluation module 8 and remote monitoring center 9, wherein:

[0020] The first controller 1 is connected with the second controller 2, the safety monitoring module 3, the battery management system 4 and the intelligent charge-discharge module 5 respectively.

[0021] The second controller 2 is connected with the several field control units 7, the state evaluation module 8 and the remote monitoring center 9 respectively.

[0022] Each of the sensors 6 is connected with at least one of the field control units 7.

[0023] As one of the optional embodiments, the first controller 1 is a programmable logic controller.

[0024] Specifically, the first controller 1 can be a PLC (Programmable Logic Controller), because the PLC can quickly respond to the control requirements under high load conditions and ensure the stability of the system; the second controller 2 can be an ARM Cortex-M4 microprocessor. The utility model embodiment can effectively balance the real-time control of the battery and the safety state monitoring of the electrochemical energy storage device by setting two controllers, i.e., by double-kernel (controller) design, which has strong practicability.

[0025] As one of the optional embodiments, the sensors 6 include current sensors 61, voltage sensors 62 and temperature sensors 63.

[0026] As one of the optional embodiments, the current sensor 61 is a Hall effect current sensor, the voltage sensor 62 is a ferrite capacitance sensor, and the temperature sensor 63 is an NTC (Negative Temperature Coefficient) thermistor.

[0027] It can be understood that the current sensor 61, the voltage sensor 62, and the temperature sensor 63 are responsible for monitoring the current, voltage, and temperature of the energy storage converter. Further, the current sensor 61, the voltage sensor 62, and the temperature sensor 63 are connected to the field control unit (FCU) 7 through a CAN (Controller Area Network) bus to transmit the collected current, voltage, and temperature to the field control unit 7.

[0028] It is worth noting that one field control unit 7 can be connected to one sensor 6, or can be connected to multiple sensors 6 (for example, when the number of sensors 6 is greater than the number of field control units 7), which is not limited herein.

[0029] The field control unit 7 is responsible for real-time data acquisition, that is, for collecting data from the sensor 6. At the same time, the field control unit 7 also has local processing capability and can quickly respond to parameter changes in the equipment operation at the field level. Finally, the field control unit 7 also uploads the (preliminarily processed) data to the second controller 2 to realize efficient data acquisition.

[0030] Referring to Figure 1 , the second controller 2 is connected to multiple field control units 7, thereby constituting a step-by-step architecture data acquisition system, that is, a DCS (Distributed Control System). Specifically, the step-by-step data acquisition system includes the sensor 6 (the current sensor 61, the voltage sensor 62, and the temperature sensor 63), the field control unit 7, and the second controller 2.

[0031] Further, the second controller 2 is responsible for summarizing and centrally processing the data of the energy storage converter and communicating with the remote monitoring center 9 through the CAN bus to ensure real-time monitoring and recording of the system state. Further, the second controller 2 also transmits the summarized data to the state evaluation module 8 to evaluate the health state of the energy storage converter through the state evaluation module 8.

[0032] Compared with the prior art, the embodiments of the utility model collect data through a distributed architecture, can support parallel operation of multiple field control units, and through redundant design can also guarantee the integrity of the data and the fault tolerance capability of the system.

[0033] As one of the optional embodiments, the dual-controller-based energy storage converter safety monitoring system further comprises an operator workstation 10 and a communication module (not shown in the figure), and the second controller 2 is connected to the operator workstation 10 through the communication module.

[0034] Specifically, the state evaluation module 8 predicts the health state of the energy storage converter, such as the failure risk of the device, according to the data transmitted by the second controller 2 in combination with a big data analysis algorithm, and then transmits the health state evaluation result to the operator workstation 10 through the second controller 2 to generate and display a device health state report on the operator workstation 10. Compared with the prior art, the embodiment of the utility model can realize dynamic monitoring and failure prediction of the energy storage converter by setting the state evaluation module 8, so that potential operation problems can be found in time, and long-term monitoring and analysis can be performed through the data recording function.

[0035] Exemplarily, the communication module can also be connected to a remote monitoring center 9 through a CAN bus, and communicate with a cloud platform through an Ethernet interface.

[0036] Further, in addition to setting the second controller to control data acquisition and state evaluation of the energy storage converter, the utility model also sets the first controller 1 to control power conversion and charging and discharging of the battery pack of the energy storage converter.

[0037] As one of the optional embodiments, the first controller 1 is also connected to the semiconductor power devices inside the energy storage converter.

[0038] Specifically, the first controller 1 is connected to power semiconductor devices inside the energy storage converter, such as IGBT (Insulate-Gate Bipolar Transistor, Insulated Gate Bipolar Transistor), MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, Metal-Oxide-Semiconductor Field-Effect Transistor) and the like, and controls the size of power conversion by controlling the switching frequency and pulse width modulation (PWM, Pulse Width Modulation) signal of the power semiconductor devices.

[0039] Further, the first controller 1 of the utility model is connected to the battery management system (BMS, Battery Management System) 4 through a high-speed CAN bus and controls it in real time to manage the charging and discharging process and current regulation of the battery.

[0040] As one of the optional embodiments, the intelligent charging and discharging module 5 includes a MOSFET switch control circuit 51 and a balancing charging circuit 52, which are respectively connected to the first controller 1 and the battery monomers.

[0041] Specifically, the MOSFET switch control circuit 51 is connected to the first controller 1 and the battery monomers (not shown), and opens or closes the charging and discharging path according to the instructions of the first controller 1. Figure 1 The balancing charging circuit 52 is connected to the first controller 1 and the battery monomers (not shown), and distributes the charging current between each battery monomer according to the instructions of the first controller 1, thereby ensuring the consistency and stability of the battery pack voltage. Figure 1

[0042] Further, the intelligent charging and discharging control module 5 also communicates with the battery management system 4 through the CAN bus to monitor the voltage and temperature of each battery monomer in real time, and transmits these data to the first controller 1 to help the first controller 1 make optimal decisions during charging and discharging, ensuring the safe operation of the battery pack and preventing overcharging or overdischarging.

[0043] As one of the optional embodiments, the safety monitoring module 3 includes a solid-state relay 31 and an optocoupler isolation circuit 32, which are respectively connected to the first controller 1.

[0044] Specifically, the safety monitoring module 3 realizes over-limit protection of current, voltage and temperature by setting the solid-state relay 31 and the optocoupler isolation circuit 32. When the system parameters exceed the preset safety range, the first controller 1 quickly cuts off the power supply through the solid-state relay 31 to ensure system safety. In addition, the second controller 2 is responsible for recording and analyzing fault data and feeding it back to the remote monitoring center 9 to ensure the integrity of fault troubleshooting.

[0045] ​Compared with the prior art, the energy storage converter safety monitoring system based on double controllers provided by the utility model embodiment, which comprises a first controller 1, a second controller 2, a safety monitoring module 3, a battery management system 4, an intelligent charge-discharge module 5, a plurality of sensors 6, a plurality of field control units 7, a state evaluation module 8 and a remote monitoring center 9, wherein the first controller 1 is connected with the second controller 2, the safety monitoring module 3, the battery management system 4 and the intelligent charge-discharge module 5 respectively; the second controller 2 is connected with the plurality of field control units 7, the state evaluation module 8 and the remote monitoring center 9 respectively; and each sensor 6 is connected with at least one field control unit 7. The utility model can simultaneously consider the real-time state evaluation of the energy storage converter and the real-time control of the battery pack by designing the double controller framework, thereby providing more comprehensive technical support for the safe and stable operation of the energy storage converter, and the utility model has strong practicability; and the utility model can support parallel data acquisition and improve the fault tolerance of the system by using the step-by-step framework to collect the data of the energy storage converter.

[0046] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the utility model, and these improvements and refinements are also regarded as the protection scope of the utility model.

Claims

1. A dual-controller-based energy storage converter safety monitoring system, characterized in that, The system comprises a first controller, a second controller, a safety monitoring module, a battery management system, an intelligent charging and discharging module, a plurality of sensors, a plurality of field control units, a state evaluation module and a remote monitoring center, wherein: The first controller is connected to the second controller, the safety monitoring module, the battery management system and the intelligent charging and discharging module respectively. The second controller is connected to the plurality of field control units, the state evaluation module and the remote monitoring center respectively. Each of the sensors is connected to at least one of the field control units.

2. The dual-controller based energy storage converter safety monitoring system of claim 1, wherein, The safety monitoring module comprises a solid-state relay and an opto-isolator circuit, and the solid-state relay and the opto-isolator circuit are connected to the first controller respectively.

3. The dual-controller based energy storage inverter safety monitoring system of claim 1, wherein, The intelligent charging and discharging module comprises a MOSFET switch control circuit and an equalization charging circuit, and the MOSFET switch control circuit and the equalization charging circuit are connected to the first controller respectively, and the MOSFET switch control circuit and the equalization charging circuit are connected to battery cells respectively.

4. The dual-controller based energy storage inverter safety monitoring system of claim 1, wherein, The first controller is further connected to semiconductor power devices inside an energy storage converter.

5. The dual-controller based energy storage inverter safety monitoring system of claim 1, wherein, The safety monitoring system of the energy storage converter based on the double controllers further comprises an operator workstation and a communication module, and the operator workstation is connected to the second controller through the communication module.

6. The dual-controller based energy storage inverter safety monitoring system of claim 1, wherein, The sensors comprise current sensors, voltage sensors and temperature sensors.

7. The dual-controller based energy storage inverter safety monitoring system of claim 6, wherein, The current sensors are Hall effect current sensors, the voltage sensors are ferrite capacitor sensors, and the temperature sensors are NTC thermistors.

8. The dual-controller based energy storage inverter safety monitoring system of claim 1, wherein, The first controller is a programmable logic controller.

Images