CN217010745U - Photovoltaic energy storage integrated system - Google Patents
Photovoltaic energy storage integrated system Download PDFInfo
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- CN217010745U CN217010745U CN202220662444.1U CN202220662444U CN217010745U CN 217010745 U CN217010745 U CN 217010745U CN 202220662444 U CN202220662444 U CN 202220662444U CN 217010745 U CN217010745 U CN 217010745U
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- 230000005611 electricity Effects 0.000 description 5
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Abstract
The utility model provides a photovoltaic energy storage integrated system which comprises an energy storage system and a photovoltaic system, wherein the energy storage system is used for receiving and storing electric energy of the photovoltaic system, the photovoltaic system comprises a photovoltaic assembly, a local management unit, a main control unit and a temperature sensor, the local management unit is in communication connection with the main control unit, and the main control unit controls the local management unit to turn off the photovoltaic assembly or reduce the output voltage of the photovoltaic assembly when the temperature sensor detects an abnormal temperature signal. The utility model utilizes the temperature sensor to monitor the photovoltaic energy storage integrated system, thereby being capable of manually or automatically cutting off a circuit in the system at any time in emergency, reducing the maximum voltage output of the system to the human safety voltage and ensuring that an operator is not shocked by high voltage.
Description
Technical Field
The utility model relates to a photovoltaic energy storage integrated system, and belongs to the technical field of photovoltaic energy storage.
Background
The existing household photovoltaic energy storage integrated system can adjust and store electric energy through the energy storage system, so that the power supply quality is greatly improved, a user can use the electric energy with lower storage cost of the energy storage system according to the self electricity utilization condition, and the electric energy is used by the user or sold to a national power grid when the electricity price is higher, so that the electricity utilization cost is reduced, and the income is improved. However, the existing photovoltaic energy storage integrated system is easy to break down and cannot be turned off in time under the unattended condition.
In view of the above, it is necessary to provide a photovoltaic energy storage integrated system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a photovoltaic energy storage integrated system which can reduce the electricity cost and improve the income.
In order to achieve the above object, the present invention provides a photovoltaic energy storage integrated system, which comprises an energy storage system and a photovoltaic system, the energy storage system is used for receiving and storing the electric energy of the photovoltaic system, the energy storage system comprises an energy storage battery, an energy storage converter device used for controlling the charging and discharging of the energy storage battery, an energy storage energy management system and a monitoring and scheduling management system used for energy scheduling, the photovoltaic system comprises a photovoltaic module, a local management unit connected with the photovoltaic module, a main control unit connected with the local management unit and a temperature sensor connected with the main control unit, the local management unit is in communication connection with the main control unit, when the temperature sensor detects an abnormal temperature signal, the main control unit controls the local management unit to switch off the photovoltaic module or reduce the output voltage of the photovoltaic module.
As a further improvement of the present invention, the local management unit includes a voltage monitor, and the voltage monitor is configured to detect an output voltage of the photovoltaic module periodically or after a control state of the local management unit changes, and feed the output voltage back to the main control unit to determine whether the photovoltaic module is turned off or the output voltage is reduced.
As a further improvement of the present invention, the photovoltaic module and the local management unit are connected by a main line, the local management unit includes a local controller and a switch, and the local controller is configured to receive a turn-off signal sent by the main control unit and control the switch to be closed or opened according to the turn-off signal, so that the photovoltaic module is connected to or disconnected from the main line.
As a further improvement of the present invention, the local management unit includes a local controller and a voltage regulator, and the local controller is configured to receive a shutdown signal sent by the main control unit and control the voltage regulator to regulate the output voltage of the photovoltaic module according to the shutdown signal.
As a further improvement of the utility model, the voltage regulator is a DC/DC power converter.
As a further development of the utility model, the temperature sensor is arranged in one or more of the photovoltaic module, the local management unit and the main control unit.
As a further improvement of the present invention, a plurality of photovoltaic modules and a plurality of local management units are provided, the photovoltaic modules are connected with the local management units one by one, and the plurality of local management units are connected with the main control unit.
As a further improvement of the present invention, the main control unit is configured to query a detection result of the temperature sensor and determine whether to send a shutdown signal to the local management unit.
As a further improvement of the present invention, the photovoltaic system further includes an inverter, and the photovoltaic system connects the user terminal and the commercial power and supplies power to the user terminal and the commercial power through the inverter.
As a further improvement of the utility model, the local management unit is in communication connection with the main control unit through a wireless network or a PLC.
The utility model has the beneficial effects that: the utility model utilizes the temperature sensor to monitor the photovoltaic energy storage integrated system, thereby being capable of manually or automatically cutting off a circuit in the system at any time in an emergency, reducing the maximum voltage output of the system to the safe voltage of a human body and ensuring that an operator is not shocked by high voltage.
Drawings
Fig. 1 is a schematic structural diagram of a photovoltaic energy storage integrated system of the utility model.
Fig. 2 is a schematic diagram of the energy storage system of fig. 1.
Fig. 3 is a schematic diagram of the photovoltaic system of fig. 1.
Fig. 4 is a schematic flow diagram of the shutdown of the photovoltaic system shown in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1 to 4, the utility model discloses a photovoltaic energy storage integrated system, which mainly comprises an energy storage system and a photovoltaic system, wherein the energy storage system is used for receiving and storing electric energy of the photovoltaic system. The energy storage system can store redundant heat energy, kinetic energy, electric energy, potential energy, chemical energy and the like so as to change the output capacity, the output place, the output time and the like of the energy. In this embodiment, the energy storage system is used for storing electric energy, so as to reasonably utilize energy and improve the utilization rate of energy. Of course, in other embodiments of the present invention, the energy storage system may store other forms of energy, which are not described in detail herein, and are not intended to be limiting.
As shown in fig. 2, the energy storage system includes an energy storage battery, an energy storage converter device, a local storage, an energy storage energy management system, and a monitoring and scheduling management system, wherein the energy storage battery is a lithium battery or a sodium battery, and is connected in series or in parallel; the energy storage converter device is used for controlling the charging and discharging processes of the energy storage battery, performing AC/DC conversion and directly supplying power to an AC load under the condition of no power grid; the local memory is used for collecting information of each detection device in the local control area, wherein the information comprises switching value, analog quantity and serial device information; the energy storage energy management system is used for data acquisition, data analysis and display and energy scheduling; the monitoring and scheduling management system is used for energy scheduling or used as a management center.
In a preferred embodiment of the present invention, the energy storage battery includes at least one battery unit, and the number of the battery units may be set according to needs, and is not limited herein. It is understood that the battery cells may be connected in series or in parallel or in series and parallel with each other. For example, the energy storage battery includes m groups of energy storage battery packs, where each group of energy storage battery packs includes n battery units, the battery units in each group of energy storage battery packs are connected in series, and adjacent energy storage battery packs are connected in series or in parallel. When adjacent energy storage battery packs are connected in series and any one of the battery units is offline, the external output voltage of the energy storage system is reduced; when adjacent energy storage battery packs are connected in parallel, when any one of the battery units is offline, the external output voltage of the energy storage system is unchanged. In the present embodiment, the battery unit is a lithium battery or a sodium battery, but the battery unit may also be a storage battery or other types of batteries as long as the storage of electric energy is achieved, and the present invention is not limited thereto.
In another embodiment of the utility model, two adjacent battery units are connected in a hot plug manner, so that after any one of the battery units is offline, the normal operation of other battery units is not affected.
In another embodiment of the present invention, the energy storage system further includes a manual switch, the manual switch belongs to a physical switch, and the manual switch may include a main switch for switching off the energy storage system and a branch switch for respectively controlling each of the photovoltaic modules, so as to ensure that the energy storage system can be manually turned off when the local management unit fails or is abnormal, so as to ensure safety and improve stability of the entire energy storage system.
In a preferred embodiment of the present invention, the photovoltaic energy storage integrated system is configured to supply power to a user side and a commercial power, and the photovoltaic energy storage integrated system may be arranged at a home of a user, continuously supply power to the user side through the photovoltaic system, and store redundant electric quantity in the energy storage system; meanwhile, whether the energy storage system is connected with the mains supply or not can be determined according to the selection of a user so as to transmit the electric quantity stored in the energy storage system.
As shown in fig. 3 and 4, in particular, the photovoltaic system includes a photovoltaic module, a local management unit, a main control unit, a temperature sensor, and an inverter, the photovoltaic module is used for generating electricity, and is preferably a photovoltaic solar panel; the local management unit is connected with the photovoltaic module and is used for managing the photovoltaic module, including but not limited to detecting input and output information of the photovoltaic module; the inverter is electrically connected with the photovoltaic assembly through a main line, one end of the local management unit is connected with the photovoltaic assembly, the other end of the local management unit is connected to the main line, and the local management unit is in communication connection with the main control unit to control the connection of the photovoltaic assembly and the main line.
In this embodiment, the main control unit is connected to the local management unit, the photovoltaic modules and the local management unit are provided with a plurality of units, the photovoltaic modules and the local management unit are connected one by one, and each of the local management units is in communication connection with the main control unit through a wireless network or a PLC, so that the main control unit can control the photovoltaic modules independently through the local management unit. The inverter may convert the variable dc voltage generated by the photovoltaic module into a utility frequency Alternating Current (AC) to power the customer premises and the utility.
Of course, in other embodiments, the number of the local management units may also be set to be less than the number of the photovoltaic modules, and in this case, one local management unit may be used to control the on/off of a plurality of photovoltaic modules, which is not limited herein. The main control unit can also be independently arranged at any position of the photovoltaic system, and is not limited herein.
The temperature sensor is connected with the main control unit and used for monitoring the temperature of the photovoltaic system in real time, the temperature sensor is arranged in one or more of the photovoltaic module, the local management unit and the main control unit and sends an abnormal temperature signal to the corresponding local management unit or the main control unit when monitoring that any one of the photovoltaic module, the local management unit or the main control unit is at abnormal temperature, and the local management unit or the main control unit controls the photovoltaic module to be switched off or reduce the external output voltage of the photovoltaic module until the external output voltage is lower than a preset safety value. Specifically, when the temperature sensor monitors that the temperature of the photovoltaic module continuously or repeatedly exceeds a preset temperature within a certain time, it is determined that the photovoltaic module is in an abnormal temperature state. The temperature sensor may also be disposed in the local management unit, or at any position in the photovoltaic system, as long as it can be communicatively connected with the main control unit, which is not limited herein.
Of course, in other embodiments of the present invention, the main control unit may also directly query the detection result of the temperature sensor, determine whether the detection result is abnormal and send a shutdown signal to the local management unit, and then turn off or reduce the output voltage of the photovoltaic module.
It should be noted that the temperature sensor is an early warning sensor, including but not limited to a voltage sensor, a current sensor, an electric quantity sensor, a smoke sensor, or a fire sensor. The specific arrangement positions and number of the temperature sensors are not limited, and the temperature sensors may be arranged in the local management unit, the main control unit, or any position in the photovoltaic system, and may be specifically arranged as required, and no limitation is made herein. It can be understood that when the voltage or current of the photovoltaic module monitored by the voltage sensor or the current sensor continuously or repeatedly exceeds a preset value within a certain time, the photovoltaic module is judged to be in an abnormal state of voltage or current. And when the light receiver of the smoke sensor detects that the light quantity from the light receiver is reduced, the photocurrent is reduced, and the energy storage system is judged to be in an environment abnormal state. In the present invention, the structure and operation principle of other sensors are similar, and are not described in detail herein.
In the above embodiment, the local management unit includes a local controller and a switch, the photovoltaic module is connected to the local management unit through a main line, and the local controller is configured to receive a shutdown signal sent by the main control unit and control the switch to be turned on or off according to the shutdown signal, so that the photovoltaic module is connected to the main line or disconnected from the main line, and thus the photovoltaic module can be timely turned off when an abnormality occurs. The switch is an electric control switch, and can be a relay or other types of structures.
Of course, the local management unit may further include a voltage regulator, the local controller is configured to receive a shutdown signal sent by the main control unit and control the voltage regulator to regulate the output voltage of the photovoltaic module according to the shutdown signal, and similarly, after obtaining the turn-on signal from the main control unit, the local controller connects the photovoltaic module to the main line or restores the output voltage of the photovoltaic module to normal. It can be understood that the switches and the voltage regulators are provided in plurality and in one-to-one correspondence with the photovoltaic modules so as to control the photovoltaic modules individually. In particular, the voltage regulator is a DC/DC power converter.
In another preferred embodiment of the present invention, the local management unit further includes a voltage monitor, and the voltage monitor is configured to detect an output voltage of the photovoltaic module periodically or after a control state of the local management unit changes, and feed the output voltage back to the main control unit to determine whether the photovoltaic module is turned off or the output voltage is reduced. It should be noted that the control state of the local management unit refers to a state change of the local management unit after receiving a shutdown signal or a startup signal from the main control unit, that is, the local management unit generates an action of operating the state of the photovoltaic module.
As shown in fig. 4, taking a photovoltaic module as an example, under a normal condition, the photovoltaic module is connected to a main line and normally works, when the temperature sensor detects that the temperature is abnormal, information is fed back to the main control unit, the main control unit sends a shutdown signal to the local management unit, and after receiving the shutdown signal, the local management unit controls the switch to disconnect the photovoltaic module from the main line or controls the voltage regulator to reduce the output voltage of the photovoltaic module, and similarly, the local management unit may also directly receive a manual operation instruction to perform shutdown. Of course, it can be understood that when the local management unit and the main control unit are in an abnormal condition, the local management unit and the main control unit may also directly control the photovoltaic module to disconnect from the main line or reduce the output voltage of the photovoltaic module, so that the maximum voltage output of the photovoltaic energy storage integrated system is reduced to the human body safety voltage, which is not described herein again.
In summary, the utility model monitors the photovoltaic energy storage integrated system by using the temperature sensor and the voltage monitor, so that the circuit in the system can be manually cut off or automatically cut off at any time in an emergency, the maximum voltage output of the system is reduced to the human safety voltage, and the operator is ensured not to be shocked by high voltage.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a photovoltaic energy storage integrated system, includes energy storage system and photovoltaic system, energy storage system is used for receiving the electric energy of photovoltaic system and stores which characterized in that: the energy storage system comprises an energy storage battery, an energy storage converter device used for controlling charging and discharging of the energy storage battery, an energy storage energy management system and a monitoring and scheduling management system used for energy scheduling, the photovoltaic system comprises a photovoltaic assembly, a local management unit connected with the photovoltaic assembly, a main control unit connected with the local management unit and a temperature sensor connected with the main control unit, the local management unit is in communication connection with the main control unit, so that when the temperature sensor detects an abnormal temperature signal, the local management unit is controlled to turn off or reduce the photovoltaic assembly or the output voltage of the photovoltaic assembly.
2. The integrated photovoltaic energy storage system of claim 1, wherein: the local management unit comprises a voltage monitor, and the voltage monitor is used for detecting the output voltage of the photovoltaic module and feeding the output voltage back to the main control unit periodically or after the control state of the local management unit changes so as to judge whether the photovoltaic module is turned off or the output voltage is reduced.
3. The integrated photovoltaic energy storage system of claim 1, wherein: the photovoltaic module is connected with the local management unit through a main line, the local management unit comprises a local controller and a switch, and the local controller is used for receiving a turn-off signal sent by the main control unit and controlling the switch to be closed or opened according to the turn-off signal so that the photovoltaic module is connected to the main line or disconnected from the main line.
4. The integrated photovoltaic energy storage system of claim 1, wherein: the local management unit comprises a local controller and a voltage regulator, wherein the local controller is used for receiving a shutdown signal sent by the main control unit and controlling the voltage regulator to regulate the output voltage of the photovoltaic module according to the shutdown signal.
5. The integrated photovoltaic energy storage system according to claim 4, wherein: the voltage regulator is a DC/DC power converter.
6. The integrated photovoltaic energy storage system of claim 1, wherein: the temperature sensor is disposed in one or more of the photovoltaic module, the local management unit, and the master control unit.
7. The integrated photovoltaic energy storage system of claim 1, wherein: the photovoltaic module with local management unit all is equipped with a plurality ofly, just photovoltaic module with local management unit links to each other one by one, and is a plurality of local management unit all with main control unit links to each other.
8. The integrated photovoltaic energy storage system of claim 1, wherein: the main control unit is used for inquiring the detection result of the temperature sensor and judging whether to send a turn-off signal to the local management unit.
9. The integrated photovoltaic energy storage system of claim 1, wherein: the photovoltaic system further comprises an inverter, and the photovoltaic system is connected with the user side and the commercial power and supplies power to the user side and the commercial power through the inverter.
10. The integrated photovoltaic energy storage system of claim 1, wherein: and the local management unit is in communication connection with the main control unit through a wireless network or a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220662444.1U CN217010745U (en) | 2022-03-25 | 2022-03-25 | Photovoltaic energy storage integrated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220662444.1U CN217010745U (en) | 2022-03-25 | 2022-03-25 | Photovoltaic energy storage integrated system |
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| CN217010745U true CN217010745U (en) | 2022-07-19 |
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| CN202220662444.1U Active CN217010745U (en) | 2022-03-25 | 2022-03-25 | Photovoltaic energy storage integrated system |
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