Parallel operation control method, power generation equipment, energy storage equipment and range extending system

Abstract

The invention provides a parallel operation control method, power generation equipment, energy storage equipment and a range extending system, and relates to the field of electrical engineering and control. In the application, when it is determined that the voltage of a first parallel operation port is a first preset threshold value, a first parallel operation switch is controlled to be closed; in response to closing of the first parallel operation switch, controlling the voltage adjusting circuit to adjust the first voltage output by the rectifying circuit to a target voltage value so as to enable the power generation equipment and the energy storage equipment to be in parallel operation; the target voltage value is greater than a first preset threshold value and greater than or equal to a parallel operation control demand voltage of the power generation equipment; when it is determined that the voltage of the first parallel operation port is the target voltage value, waiting for receiving a first control instruction sent by the energy storage equipment; in response to the first control instruction, controlling the voltage regulation circuit to regulate the first voltage to a target voltage value; and after the voltage regulation circuit outputs the target voltage value, the first parallel operation switch is controlled to be closed, so that the power generation equipment and the energy storage equipment are subjected to parallel operation. In this way, parallel operation control of the range extending system under different working conditions is achieved.

Description

Technical Field

[0001] This application relates to the field of electrical engineering and control, and in particular to a parallel control method, power generation equipment, energy storage equipment and range extender system. Background Technology

[0002] In range extender systems (such as generator systems), the generator and energy storage devices are connected by cables (e.g., power cables, signal cables, or grounding cables). Both the generator's port circuit and the energy storage device's port circuit are equipped with relays for switching the port circuits on and off. Therefore, when both the relays in the generator's port circuit and the energy storage device's port circuit are closed, the electrical energy generated by the generator can be transferred to the energy storage device for storage. However, how to achieve parallel control between the generator and energy storage devices under different operating conditions is a problem that urgently needs to be solved. Summary of the Invention

[0003] This application provides a parallel control method, a power generation device, an energy storage device, and a range extender system to achieve parallel control between the power generation device and the energy storage device under different operating conditions.

[0004] In a first aspect, embodiments of this application provide a parallel operation control method applied to a controller of a power generation device in a range extender system. The range extender system further includes an energy storage device electrically connected to the power generation device. The power generation device includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel operation switch, all electrically connected in sequence. One end of the first parallel operation switch is connected to a first parallel operation port of the power generation device. The first parallel operation port is used to connect to a second parallel operation port of the energy storage device via a cable. The parallel operation control method includes: Receive a start signal, and start the engine and the generator according to the start signal, so that the rectifier circuit outputs a first voltage; When the voltage of the first parallel port is determined to be a first preset threshold, the first parallel switch is controlled to close; in response to the closure of the first parallel switch, the voltage adjustment circuit is controlled to adjust the first voltage to a target voltage value so that the power generation equipment and the energy storage equipment can be paralleled; wherein, the target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation equipment; When the voltage of the first parallel port is determined to be the target voltage value, the system waits to receive the first control command sent by the energy storage device; in response to the first control command, the system controls the voltage adjustment circuit to adjust the first voltage to the target voltage value; after the voltage adjustment circuit outputs the target voltage value, the system controls the first parallel switch to close so that the power generation device and the energy storage device can be connected in parallel.

[0005] Secondly, embodiments of this application provide a parallel operation control method applied to a controller of an energy storage device in a range extender system. The range extender system further includes a power generation device electrically connected to the energy storage device. The energy storage device includes an energy storage circuit and a second parallel operation switch connected in sequence. One end of the second parallel operation switch is electrically connected to a second parallel operation port of the energy storage device. The second parallel operation port is connected to a first parallel operation port of the power generation device via a cable. The parallel operation control method includes: After the energy storage device is started, and when the voltage at the second parallel port is at a first preset threshold, the second parallel switch is controlled to close so that the voltage at the second parallel port reaches a target voltage value; wherein the target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation device; In response to the voltage at the second parallel port reaching the target voltage value, a start signal is sent to the power generation equipment to start the engine and generator in the power generation equipment; Send a first control command to the power generation equipment to enable the power generation equipment and the energy storage equipment to operate in parallel.

[0006] Thirdly, embodiments of this application provide a parallel operation control method applied to a range extender system. The range extender system includes an energy storage device and a power generation device. The power generation device includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel operation switch connected in sequence. One end of the first parallel operation switch is connected to a first parallel operation port of the power generation device. The energy storage device includes an energy storage circuit and a second parallel operation switch connected in sequence. One end of the second parallel operation switch is connected to a second parallel operation port of the energy storage device. The first parallel operation port is electrically connected to the second parallel operation port via a cable. The parallel operation control method includes: After the energy storage device is started, and when the voltage at the second parallel port is at a first preset threshold, the second parallel switch is controlled to close so that the voltage at the second parallel port reaches a target voltage value; wherein the target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation device; In response to the voltage at the second parallel port reaching the target voltage value, a start signal is sent to the power generation equipment; The power generation equipment receives the start signal and starts the engine and generator according to the start signal, so that the rectifier circuit outputs a first voltage; When the power generation equipment determines that the voltage at the first parallel port is the target voltage value, it waits to receive the first control command sent by the energy storage device. The energy storage device sends the first control command to the power generation device; In response to the first control command, the power generation equipment controls the voltage adjustment circuit to adjust the first voltage to the target voltage value; After the voltage adjustment circuit outputs the target voltage value, the power generation equipment controls the first parallel switch to close, so that the power generation equipment and the energy storage equipment can operate in parallel.

[0007] Fourthly, embodiments of this application provide a power generation device for connection to an energy storage device. The power generation device includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel switch connected in sequence. One end of the first parallel switch is connected to a first parallel port of the power generation device. The first parallel port is used to connect to a second parallel port of the energy storage device via a cable. The power generation device also includes a controller for executing the parallel control method according to the first aspect.

[0008] Fifthly, embodiments of this application provide an energy storage device for electrical connection with a power generation device. The energy storage device includes an energy storage circuit and a second parallel switch connected in sequence. One end of the second parallel switch is electrically connected to a second parallel port of the energy storage device. The second parallel port is connected to a first parallel port of the power generation device via a cable. The energy storage device also includes a controller for executing the parallel control method according to the second aspect.

[0009] Sixthly, embodiments of this application provide a range extender system, the range extender system comprising: an energy storage device and a power generation device; wherein, The power generation equipment includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel switch connected in sequence. One end of the first parallel switch is connected to a first parallel port of the power generation equipment. The first parallel port is electrically connected to a second parallel port of the energy storage device via a cable. The power generation equipment also includes a controller for executing the parallel control method according to the first aspect. The energy storage device includes an energy storage circuit and a second parallel switch connected in sequence. One end of the second parallel switch is electrically connected to the second parallel port. The energy storage device also includes a controller for executing the parallel control method according to the second aspect.

[0010] The beneficial effects of this application are as follows: In the parallel operation control method provided in this application embodiment, applied to the controller of the power generation equipment in a range extender system, the range extender system further includes an energy storage device electrically connected to the power generation equipment. The power generation equipment includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel operation switch connected in sequence. One end of the first parallel operation switch is connected to a first parallel operation port of the power generation equipment. The first parallel operation port is used to connect to a second parallel operation port of the energy storage device via a cable. The parallel operation control method executed by the controller of the power generation equipment in the range extender system includes: receiving a start signal, starting the engine and generator according to the start signal to make the rectifier circuit output a first voltage; determining the voltage of the first parallel operation port... When the voltage is at the first preset threshold, the first parallel switch is closed. In response to the closure of the first parallel switch, the voltage adjustment circuit adjusts the first voltage to the target voltage value, enabling the power generation equipment and the energy storage equipment to operate in parallel. The target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation equipment. Alternatively, when the voltage at the first parallel port is determined to be the target voltage value, the system waits to receive a first control command from the energy storage equipment. In response to the first control command, the voltage adjustment circuit adjusts the first voltage to the target voltage value. After the voltage adjustment circuit outputs the target voltage value, the first parallel switch is closed, enabling the power generation equipment and the energy storage equipment to operate in parallel. Therefore, the controller of the power generation equipment in the range extender system can use the corresponding parallel switch control method to close the first parallel switch when the voltage at the first parallel port is at different values ​​(e.g., the voltage at the first parallel port is the first preset threshold or the target voltage value), enabling the power generation equipment and the energy storage equipment to operate in parallel. This achieves parallel control between the power generation equipment and the energy storage equipment under different operating conditions.

[0011] Furthermore, other features and advantages of this application will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described herein are used to provide a further understanding of this application, constitute a part of this application, and do not constitute an improper limitation of this application. In the accompanying drawings: Figure 1 This is a schematic diagram of the system architecture of a range extender system provided in an embodiment of this application.

[0013] Figure 2 This is a schematic diagram illustrating the implementation process of a parallel control method provided in an embodiment of this application.

[0014] Figure 3 This is a schematic diagram of the system architecture of another range extender system provided in an embodiment of this application.

[0015] Figure 4 This is a schematic diagram illustrating the implementation process of a parallel control method under a first operating condition, as provided in an embodiment of this application.

[0016] Figure 5 This is a schematic diagram illustrating the implementation process of a parallel control method under a second operating condition, provided in an embodiment of this application.

[0017] Figure 6 This is a schematic diagram illustrating the implementation process of a parallel control method under a third operating condition, provided in an embodiment of this application.

[0018] Figure 7 This is a schematic diagram illustrating the implementation process of a parallel control method under a fourth operating condition, provided in an embodiment of this application.

[0019] Figure 8 This is a schematic diagram illustrating the implementation process of another parallel control method provided in this application embodiment.

[0020] Reference numerals: 11 - Power generation equipment; 111 - Engine; 112 - Generator; 113 - Rectifier circuit; 114 - Voltage regulation circuit; 115 - First parallel switch; 116 - First parallel port; 117 - Controller of power generation equipment; 118 - First auxiliary power supply circuit; 119 - First pre-charge circuit; 12 - Energy storage equipment; 121 - Second parallel port; 122 - Energy storage circuit; 123 - Second parallel switch; 124 - Controller of energy storage equipment; 125 - Second pre-charge circuit; 126 - Second auxiliary power supply circuit; 13 - Cable; R1 - First protection resistor; R2 - Second protection resistor; K1 - First pre-charge switch; K2 - Second pre-charge switch. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the embodiments of this application, it should be noted that, in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0023] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] In the description of the embodiments of this application, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this application is not to be construed as being better or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner. In addition, "multiple" in the embodiments of this application refers to two or more. Therefore, "multiple" can also be understood as "at least two" in the embodiments of this application. "At least one" can be understood as one or more, such as one, two, or more. For example, including at least one means including one, two, or more, and is not limited to which ones are included. For example, including at least one of A, B, and C, then it can include A, B, C, A and B, A and C, B and C, or A and B and C.

[0025] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following associated objects have an "or" relationship. It should be pointed out that in the embodiments of this application, "connection" can be understood as an electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0026] Furthermore, the names of the messages or information exchanged between the multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0027] The design concept of the embodiments of this application is briefly introduced below: In existing range extender systems, power generation equipment and energy storage equipment are connected via various cables. Each of the power generation and energy storage equipment has corresponding port circuits equipped with relays for switching the port circuits on and off. Specifically, when both the relays in the power generation equipment's port circuit and the energy storage equipment's port circuit are closed, the electrical energy generated by the power generation equipment can be transferred to the energy storage equipment for storage. Therefore, how to achieve parallel control between the power generation equipment and energy storage equipment under different operating conditions is a pressing problem that needs to be solved. To address or improve the aforementioned problems, this application provides a parallel operation control method applied to the controller of a power generation device in a range extender system. Specifically, it includes: receiving a start signal; starting the engine and generator according to the start signal to cause the rectifier circuit to output a first voltage; controlling the first parallel operation switch to close when the voltage of the first parallel operation port is determined to be a first preset threshold; responding to the closing of the first parallel operation switch, controlling a voltage adjustment circuit to adjust the first voltage to a target voltage value, so that the power generation device and the energy storage device can operate in parallel; wherein the target voltage value is greater than the first preset threshold and greater than or equal to the parallel operation control voltage required by the power generation device; or, when the voltage of the first parallel operation port is determined to be the target voltage value, waiting to receive a first control command sent by the energy storage device; responding to the first control command, controlling the voltage adjustment circuit to adjust the first voltage to the target voltage value; and after the voltage adjustment circuit outputs the target voltage value, controlling the first parallel operation switch to close, so that the power generation device and the energy storage device can operate in parallel. In this way, the controller of the power generation equipment in the range extender system can control the first parallel switch to close under different voltage values ​​at the first parallel port, i.e., under different operating conditions of the range extender system, so as to enable the power generation equipment and the energy storage equipment to operate in parallel. That is, parallel control between the power generation equipment and the energy storage equipment is realized under different operating conditions.

[0028] In particular, the preferred embodiments of this application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments of this application and the features in the embodiments can be combined with each other unless otherwise specified.

[0029] See Figure 1 The diagram shown is a system architecture schematic of a range extender system provided in an embodiment of this application. The range extender system may include: a power generation device 11, an energy storage device 12, and a cable 13. The power generation device 11 can be connected to the energy storage device 12 via the cable 13, meaning the energy storage device 12 can be connected to the power generation device 11 via the cable 13.

[0030] Optional, as before Figure 1 As shown, the power generation device 11 may include: an engine 111, a generator 112, a rectifier circuit 113, a voltage regulation circuit 114, and a first parallel switch 115, which are connected in sequence. One end of the first parallel switch 115 is connected to a first parallel port 116 of the power generation device 11. The first parallel port 116 is used to connect to a second parallel port 121 of the energy storage device 12 via a cable 13. The power generation device 11 may also include a controller 117. It should be understood that the controller 117 of the power generation device 11 may be connected to the engine 111, generator 112, rectifier circuit 113, voltage regulation circuit 114, and first parallel switch 115 via wired or wireless communication, respectively. This embodiment of the application does not limit this.

[0031] The energy storage device 12 may include an energy storage circuit 122 and a second parallel switch 123 connected in sequence. One end of the second parallel switch 123 is electrically connected to a second parallel port 121 of the energy storage device 12. The second parallel port 121 is connected to a first parallel port 116 of the power generation device 11 via a cable 13. The energy storage device 12 may also include a controller 124. It should be understood that the controller 124 of the energy storage device 12 may be connected to the energy storage circuit 122 and the second parallel switch 123 via wired or wireless communication, respectively; this embodiment does not limit this connection.

[0032] Because the voltage at the first parallel port 116 and the voltage at the second parallel port 121 differ under different operating conditions of the range extender system, the controller 117 of the generator 11 controls the opening and closing of the first parallel switch 115 based on the voltage at the first parallel port 116, and the controller 124 of the energy storage device 12 controls the opening and closing of the second parallel switch 123 based on the voltage at the second parallel port 121, thus enabling parallel control between the generator 11 and the energy storage device 12. Optionally, the operating conditions of the range extender system may include: the energy storage device 12 being in a dormant / off state and the generator 11 being in an operating state (or powered on state), i.e., the first operating condition; the energy storage device 12 being in an operating state and the generator 11 being in an operating state, i.e., the second operating condition; the generator 11 being in a dormant / off state and the energy storage device 12 being in an operating state, i.e., the third operating condition; and the generator 11 being in a standby state and the energy storage device 12 being in an operating state, i.e., the fourth operating condition.

[0033] The parallel control method provided by the exemplary embodiments of this application will be described below in conjunction with the above system architecture and with reference to the accompanying drawings. It should be noted that the above system architecture is only shown for the purpose of understanding the spirit and principles of this application, and the embodiments of this application are not limited in any way.

[0034] See Figure 2 The diagram shown illustrates the implementation flow of a parallel control method provided in this application. The executing entity is taken as the controller of a power generation device. For ease of description and understanding, the controller of the power generation device will be referred to as the first controller, and the controller of the energy storage device will be referred to as the second controller. The specific implementation flow of this method is as follows: S201: Receives a start signal and starts the engine and generator according to the start signal so that the rectifier circuit outputs the first voltage.

[0035] The aforementioned start-up signal can originate from the energy storage device or the second controller. For example, the second controller sends a start-up signal to the first controller to start the engine and generator. Correspondingly, the first controller receives the start-up signal from the power generation device.

[0036] Optionally, the aforementioned activation signal may also come from other devices, such as cloud devices, terminal devices, or relay devices, and this application embodiment does not specifically limit this.

[0037] For example, during step S201, after receiving the start signal, the first controller can start the engine and generator according to the start signal. After starting, the engine and generator can generate AC power and output AC voltage. Further, the rectifier circuit can convert the AC voltage to DC voltage and output DC voltage, i.e., the first voltage, such as 200V.

[0038] S202: When the voltage of the first parallel port is determined to be the first preset threshold, the first parallel switch is controlled to close.

[0039] It should be noted that if the voltage (or first voltage value) at the first parallel port is at the first preset threshold (e.g., 0V), the first controller can determine that the energy storage device is in a dormant / shutdown state and that the power generation device is in a working state, thus determining that the range extender system is in the first operating condition. Conversely, the first controller can determine that the range extender system is not in the first operating condition.

[0040] For example, when performing step S202, the first controller may output a drive signal for controlling the closing of the first parallel switch, so that the first parallel switch closes when the voltage at the first parallel port is a first preset threshold.

[0041] S203: In response to the closing of the first parallel switch, the control voltage adjustment circuit adjusts the first voltage to the target voltage value so that the power generation equipment and the energy storage equipment can be paralleled.

[0042] The target voltage value is greater than a first preset threshold and is greater than or equal to the parallel control voltage required by the power generation equipment. Optionally, the parallel control voltage required by the power generation equipment can be the start-up voltage or enable voltage of the first controller.

[0043] Based on the control method of the first parallel switch described in steps S202 to S203 above, after the first parallel switch is closed, the first controller outputs a voltage adjustment signal to control the voltage adjustment circuit to adjust the first voltage to the target voltage value (e.g., 400V), ensuring that parallel control between the power generation equipment and the energy storage equipment can be realized under the first operating condition of the range extender system.

[0044] Furthermore, when the voltage at the second parallel port reaches the target voltage value, the second controller can control the second parallel switch to close, enabling the power generation equipment and the energy storage equipment to operate in parallel. Optionally, after confirming that the energy storage equipment has been successfully connected to the power generation equipment, the second controller can also send a parallel operation success command to the first controller.

[0045] In this way, once the first controller receives the parallel operation success command from the second controller, it can stop executing the parallel operation control between the energy storage device and the power generation device, thereby reducing the load on the first controller and saving computing resources.

[0046] When the power generation equipment is in a dormant / shutdown state, i.e., when the generator and engine are not started, if the voltage at the first parallel port is the target voltage value from the beginning, the first controller can determine that the energy storage device is in an active state, and thus determine that the range extender system is in the third operating condition. In other words, the target voltage value can be used to determine whether the range extender system is in the third operating condition.

[0047] S204: When the voltage of the first parallel port is determined to be the target voltage value, wait to receive the first control command sent by the energy storage device.

[0048] For example, when performing step S204, in order to ensure that the power generation equipment can be safely connected to the energy storage equipment, the energy storage equipment (or the second controller) usually sends a first control command to the first controller to control the closing of the first parallel switch only after the energy storage equipment is started (i.e., the energy storage equipment is powered on) and when the voltage of the second parallel port (or the second voltage value) is the target voltage value (or the voltage of the first parallel port is equal to the voltage of the second parallel port).

[0049] Therefore, the first controller needs to wait for the energy storage device to start, and will only receive the first control command when the second controller adjusts the voltage of the second parallel port to the target voltage value.

[0050] Correspondingly, after the energy storage device is started and the voltage at the second parallel port is at the first preset threshold, the second controller can control the second parallel switch to close, so that the voltage at the second parallel port reaches the target voltage value, making the voltage at the first parallel port equal to the voltage at the second parallel port. At this time, the second controller can send a first control command to the power generation device or the first controller, so that the power generation device and the energy storage device can operate in parallel.

[0051] Furthermore, if the generator and engine of the power generation equipment are not started, the first controller can also send a start signal to the power generation equipment in response to the voltage at the second parallel port reaching the target voltage value, so as to start the engine and generator in the power generation equipment. Optionally, after starting the engine and generator, the first controller can also send a start success signal to the second controller.

[0052] It should also be noted that when the first controller determines that the voltage of the first parallel port is the target voltage value, and if the power generation equipment is in a hibernation / shutdown state, the range extender system can be determined to be in the third operating condition.

[0053] S205: In response to the first control command, the control voltage adjustment circuit adjusts the first voltage to the target voltage value.

[0054] Specifically, when executing step S206, after receiving the first control command from the second controller (or energy storage device), the first controller can first control the voltage adjustment circuit to adjust the first voltage to the target voltage value to ensure that the output voltage of the voltage adjustment circuit is equal to the voltage of the first parallel port. This reduces the risk that the first parallel switch may be damaged or its service life reduced due to a large voltage difference across the first parallel switch when the first parallel switch is closed.

[0055] S206: After the voltage adjustment circuit outputs the target voltage value, it controls the first parallel switch to close so that the power generation equipment and the energy storage equipment can be connected in parallel.

[0056] By controlling the closing of the first and second parallel switches according to the parallel control method described in steps S204 to S206 above, parallel control between the power generation equipment and the energy storage equipment can be realized in the third operating condition of the range extender system.

[0057] It should be noted that there is no clear sequential relationship between the parallel control methods in steps S202 to S203 and the parallel control methods in steps S204 to S206. That is, steps S202 to S203 can be executed before or after steps S204 to S206. This application embodiment does not make specific limitations in this regard.

[0058] In one optional implementation, after the first controller adjusts the first voltage to the target voltage value using the voltage adjustment circuit, but before the power generation equipment and energy storage equipment are paralleled, if the range extender system is in the second operating condition (i.e., not only is the power generation equipment operating, but the energy storage equipment is also operating), the circuit between the energy storage circuit and the second parallel switch is in a conducting state. At this time, the second parallel port will have a voltage due to the output voltage of the energy storage circuit. Therefore, if the first parallel switch is also closed, and the first parallel port also has a voltage, the voltage at the second parallel port will be unequal to the voltage at the first parallel port, potentially causing a circuit safety issue. To avoid this problem, after the energy storage equipment starts up, and when the voltage at the second parallel port is unequal to the voltage at the first parallel port, the second controller can send a second control command to the power generation equipment to make the voltage at the first parallel port reach a first preset threshold, thus ensuring that the first parallel port is not affected by the output voltage of the voltage adjustment circuit. Correspondingly, the first controller can receive the second control command sent by the energy storage equipment (or the second controller) and, in response to the received second control command, control the first parallel switch to open. The first controller can also send an indication signal to the second controller to indicate that the voltage of the first parallel port is a first preset threshold.

[0059] Next, the second controller, responding to the voltage at the first parallel port being a first preset threshold, controls the second parallel switch to close, raising the voltage at the second parallel port to the target voltage value. Then, it sends a first control command to the power generation equipment, ensuring that the voltage at the first parallel port is equal to the voltage at the second parallel port; that is, both the voltage at the second parallel port and the output voltage of the power adjustment circuit are at the target voltage value. Since the energy storage device requires a certain amount of time to adjust the voltage at the second parallel port, the first controller, after opening the first parallel switch, waits to receive the first control command from the energy storage device. Upon receiving the first control command, it responds by controlling the voltage adjustment circuit to adjust the first voltage to the target voltage value. After the voltage adjustment circuit outputs the target voltage value, it controls the first parallel switch to close.

[0060] In this way, parallel control between the power generation equipment and the energy storage equipment is realized in the second operating condition of the range extender system.

[0061] In one alternative implementation, see [link to relevant documentation]. Figure 3 As shown, the power generation equipment 11 may further include a first auxiliary power supply circuit 118. The first terminal of the first auxiliary power supply circuit 118 is connected to the first parallel port 116, and the second terminal of the first auxiliary power supply circuit 118 is electrically connected to the controller 117 (i.e., the first controller) of the power generation equipment 11.

[0062] If the range extender system is in the third operating condition, that is, the power generation equipment is in a dormant / shutdown state, the first controller needs to establish communication with the energy storage device before receiving the start signal of the power generation equipment.

[0063] Specifically, when the voltage at the first parallel port is the target voltage value, the first auxiliary power supply circuit starts after receiving the voltage at the first parallel port and provides auxiliary power to the first controller to start the first controller. After the first auxiliary power supply circuit starts, the first controller establishes communication with the energy storage device. In other words, the power generation device responds to the start of the first controller and establishes communication with the energy storage device to enable subsequent parallel control between the power generation device and the energy storage device.

[0064] Still Figure 3 As shown, the first terminal of the first auxiliary power supply circuit 118 is also electrically connected between the rectifier circuit 113 and the voltage adjustment circuit 114. At this time, the first auxiliary power supply circuit 118 is supplied with power by a voltage competition between the voltage of the first parallel port 116 and the first voltage output by the rectifier circuit 113. Specifically, the maximum voltage between the voltage of the first parallel port 116 and the first voltage output by the rectifier circuit 113 is the supply voltage of the first auxiliary power supply circuit 118.

[0065] To prevent backflow of current between the first auxiliary power supply circuit 118, the first parallel port 116, and the rectifier circuit 113 due to abnormal voltage reversal, diodes can be installed in the circuits between the first auxiliary power supply circuit 118 and the rectifier circuit 113, and between the first parallel port 116 and the first auxiliary power supply circuit 118. (Not in) Figure 3 As shown in the figure, the output terminal of the diode (i.e., the negative terminal of the diode) is connected to the first auxiliary power supply circuit 118.

[0066] In addition, as Figure 3 As shown, the first terminal of the first auxiliary power supply circuit 118 is also electrically connected to the output terminal of the voltage adjustment circuit 114. At this time, the first auxiliary power supply circuit 118 is powered by the voltage of the first parallel port 116, the voltage of the output terminal of the voltage adjustment circuit 114, and the first voltage output by the rectifier circuit 113.

[0067] Similarly, the maximum voltage among the voltage of the first parallel port 116, the voltage of the output terminal of the voltage adjustment circuit 114, and the first voltage output by the rectifier circuit 113 is the supply voltage of the first auxiliary power supply circuit 118.

[0068] Therefore, before executing step S204, the first controller can also respond to the second control command and control the output voltage of the voltage adjustment circuit to a second preset threshold. The aforementioned second preset threshold (e.g., 470) is greater than the target voltage value, thus ensuring that the voltage of the first parallel port is not affected when the first controller controls the first parallel switch to close.

[0069] Furthermore, a diode can also be installed in the circuit between the first auxiliary power supply circuit and the voltage adjustment circuit (not in...). Figure 3 As shown in the diagram, the output terminal of the diode (i.e., the negative terminal of the diode) is connected to the first auxiliary power supply circuit to prevent the current between the first auxiliary power supply circuit and the voltage regulation circuit from flowing back due to abnormal voltage reversal.

[0070] In one alternative implementation, after executing step S204, if the first controller does not receive the first control command within a set time period (e.g., 5 seconds or 10 seconds), it outputs a shutdown signal to the generator and engine to shut them down. This timely shutdown of the engine and generator reduces energy consumption.

[0071] Since the port circuits of power generation equipment or energy storage equipment usually contain capacitors (such as filter capacitors or parasitic capacitors), when the relays in the port circuit (such as the first parallel switch and the second parallel switch) are directly closed, the instantaneous charging of the capacitors will generate a large current, which will cause the parallel switches to stick or affect the service life of the parallel switches.

[0072] Therefore, it remains the same. Figure 3 As shown, the power generation equipment 11 may further include a first pre-charging circuit 119 connected in parallel with the first parallel switch 115. The first pre-charging circuit 119 includes a first protection resistor R1 and a first pre-charging switch K1 connected in series.

[0073] Therefore, the first controller can control the first pre-charge switch to close when the voltage difference across the first parallel switch is greater than a preset first difference threshold, and control the first parallel switch to close and the first pre-charge switch to open when the voltage difference across the first parallel switch is less than or equal to a preset second difference threshold. The voltage difference across the first parallel switch is also the difference between the voltage at the first parallel port and the output voltage of the voltage adjustment circuit. Thus, by using the first pre-charge switch and the first difference threshold, the problem of the first parallel switch sticking together due to a large voltage difference when directly closing it is avoided, thereby improving the service life of the first parallel switch.

[0074] Still Figure 3 As shown, the energy storage device 12 may further include a second pre-charge circuit 125 connected in parallel with the second parallel switch 123. The second pre-charge circuit 125 includes a second protection resistor R2 and a second pre-charge switch K2 connected in series.

[0075] Therefore, the second controller can control the second pre-charge switch to close when the voltage difference across the second parallel switch is greater than a preset second difference threshold, and control the second parallel switch to close and the second pre-charge switch to open when the voltage difference across the second parallel switch is less than or equal to the preset second difference threshold. The voltage difference across the second parallel switch is the difference between the output voltage of the energy storage circuit and the voltage at the second parallel port. Thus, by using the second pre-charge switch and the second difference threshold, the problem of the second parallel switch sticking together due to a large voltage difference when directly closing it is avoided, thereby improving the service life of the second parallel switch.

[0076] In addition, as Figure 3 As shown, the energy storage device 12 may further include a second auxiliary power supply circuit 126. The first terminal of the second auxiliary power supply circuit 126 is electrically connected to the second parallel port 121, and the second terminal of the second auxiliary power supply circuit 126 is electrically connected to the controller 124 (i.e., the second controller) of the energy storage device 12.

[0077] Therefore, before the energy storage device starts up, when the voltage at the second parallel port is at the target voltage value, the second auxiliary power supply circuit starts up after receiving the voltage at the second parallel port and provides auxiliary power to the second controller to start the second controller. After the second auxiliary power supply circuit starts up, the second controller establishes communication with the power generation equipment.

[0078] In other words, the energy storage device responds to the activation of the second controller and establishes communication with the power generation device in order to subsequently realize parallel control between the power generation device and the energy storage device.

[0079] Based on the above-mentioned parallel control methods for power generation equipment, parallel control methods for energy storage equipment, and such Figure 3 The range extender system shown can achieve parallel control between the power generation equipment and the energy storage equipment under four operating conditions.

[0080] See Figure 4 The diagram shown illustrates the implementation flow of a parallel control method under a first operating condition provided in this application embodiment. The specific parallel control method executed by the first controller (or power generation equipment) and the second controller (or energy storage equipment) under the first operating condition is as follows: S401: The first controller starts the engine and generator, and outputs the first voltage through the rectifier circuit.

[0081] The first voltage mentioned above can be 200V.

[0082] S402: When there is no voltage at the first parallel port, the first controller controls the first parallel switch to close.

[0083] In other words, when the voltage at the first parallel port is a first preset threshold (i.e., 0V), the first controller controls the first parallel switch to close.

[0084] S403: The first controller boosts the first voltage to the target voltage value through the voltage adjustment circuit.

[0085] The target voltage value mentioned above can be 400V.

[0086] S404: When the voltage at the second parallel port is the target voltage value, the second controller activates the second auxiliary power supply circuit and closes the second pre-charge switch.

[0087] In this way, the current gradually increases the voltage at the output terminal of the energy storage circuit through the second protective resistor.

[0088] S405: When the voltage difference across the second parallel switch is less than or equal to the preset second difference threshold, the second controller closes the second parallel switch and opens the second precharge switch.

[0089] At this point, both the first and second parallel switches are closed, meaning the energy storage device has been successfully connected to the power generation equipment.

[0090] See Figure 5The diagram shown illustrates the implementation flow of a parallel control method under a second operating condition provided in this application embodiment. The specific parallel control method executed by the first controller and the second controller under the second operating condition is as follows: S501: The first controller starts the engine and generator, and outputs the first voltage through the rectifier circuit.

[0091] S502: When there is no voltage at the first parallel port, the first controller controls the first parallel switch to close.

[0092] S503: The first controller boosts the first voltage to the target voltage value through the voltage adjustment circuit.

[0093] S504: When the voltage at the first parallel port is the target voltage value, the second controller sends a second control command to the first controller.

[0094] The aforementioned second control command can be used to instruct the first parallel switch to be disconnected and the first voltage to be boosted to a second preset threshold. The aforementioned second preset threshold can be 470V.

[0095] S505: The first controller disconnects the first parallel switch and boosts the first voltage to the second preset threshold.

[0096] S506: When there is no voltage at the second parallel port, the second controller closes the second precharge switch.

[0097] In this way, the current gradually increases the voltage at the second parallel port through the second protection resistor.

[0098] S507: When the voltage difference across the second parallel switch is less than or equal to the preset second difference threshold, the second controller closes the second parallel switch and opens the second precharge switch.

[0099] S508: The second controller sends a first control command to the first controller.

[0100] The aforementioned first control command is used to instruct the first controller to close the first parallel switch.

[0101] S509: The first controller closes the first parallel switch.

[0102] At this point, both the first and second parallel switches are closed, meaning the power generation equipment has been successfully connected to the energy storage equipment.

[0103] See Figure 6 The diagram shown illustrates the implementation flow of a parallel control method under a third operating condition provided in this application. The specific parallel control method executed by the first controller and the second controller under the third operating condition is as follows: S601: The second controller receives a request to wake up the power generation equipment for parallel connection.

[0104] The aforementioned requirement for parallel access of the wake-up power generation equipment can come from cloud devices, terminal devices, or relay devices, etc., and this application embodiment does not specifically limit this.

[0105] S602: When there is no voltage at the second parallel port, the second controller closes the second precharge switch.

[0106] In this way, the voltage at the second parallel port is gradually increased through the second protection resistor.

[0107] S603: When the voltage difference across the second parallel switch is less than or equal to the preset second difference threshold, the second controller closes the second parallel switch and opens the second precharge switch.

[0108] S604: When the voltage at the first parallel port is the target voltage value, the first controller activates the first auxiliary power supply circuit and establishes communication with the second controller.

[0109] S605: When the voltage difference across the first parallel switch is less than or equal to a preset first difference threshold, the first controller controls the first parallel switch to close.

[0110] At this point, both the first and second parallel switches are closed, meaning the power generation equipment has been successfully connected to the energy storage equipment.

[0111] See Figure 7 The diagram shown illustrates the implementation flow of a parallel control method under a fourth operating condition provided in this application. The specific parallel control method executed by the first controller and the second controller under the fourth operating condition is as follows: S701: The second controller receives a request to wake up the power generation equipment for parallel connection.

[0112] S702: When there is no voltage at the second parallel port, the second controller closes the second precharge switch.

[0113] In this way, the voltage at the second parallel port is gradually increased through the second protection resistor.

[0114] S703: When the voltage difference across the second parallel switch is less than or equal to the preset second difference threshold, the second controller closes the second parallel switch and opens the second precharge switch.

[0115] S704: When the voltage difference across the first parallel switch is less than or equal to a preset first difference threshold, the first controller controls the first parallel switch to close.

[0116] At this point, both the first and second parallel operation switches are closed, meaning the power generation equipment has successfully been connected to the energy storage device in parallel. It should be noted that the parallel operation control methods between the power generation equipment and the energy storage device are similar in the third and fourth operating conditions.

[0117] In summary, based on the above... Figures 4-7 The parallel control methods for power generation equipment and energy storage equipment shown realize parallel control between power generation equipment and energy storage equipment under different operating conditions of the range extender system.

[0118] Furthermore, based on the same technical concept, embodiments of this application also provide a parallel control method, applicable to, for example... Figure 1 or Figure 3 The range extender system shown includes an energy storage device and a power generation device. The power generation device includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel switch, all electrically connected in sequence. One end of the first parallel switch is connected to a first parallel port of the power generation device. The energy storage device includes an energy storage circuit and a second parallel switch, all electrically connected in sequence. One end of the second parallel switch is connected to a second parallel port of the energy storage device. The first parallel port is electrically connected to the second parallel port via a cable. This range extender system can perform [refer to the previous section]. Figure 8 The parallel control method shown below has the following specific implementation process: S801: After the energy storage device is started, and when the voltage at the second parallel port is at the first preset threshold, the second parallel switch is controlled to close so that the voltage at the second parallel port reaches the target voltage value.

[0119] The target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation equipment.

[0120] S802: The energy storage device sends a start signal to the power generation device in response to the voltage at the second parallel port reaching the target voltage value.

[0121] The aforementioned start signal is used to instruct the power generation equipment to control the engine and generator.

[0122] S803: The power generation equipment receives a start signal and starts the engine and generator according to the start signal so that the rectifier circuit outputs the first voltage.

[0123] S804: When the power generation equipment determines that the voltage of the first parallel port is the target voltage value, it waits to receive the first control command sent by the energy storage equipment.

[0124] The aforementioned first control command is used to instruct the power generation equipment to close the first parallel switch.

[0125] S805: The energy storage device sends the first control command to the power generation device.

[0126] S806: In response to the first control command, the power generation equipment controls the voltage adjustment circuit to adjust the first voltage to the target voltage value.

[0127] S807: After the power generation equipment outputs the target voltage value in the voltage adjustment circuit, it controls the first parallel switch to close so that the power generation equipment and the energy storage equipment can operate in parallel.

[0128] Based on the parallel control method described in steps S801 to S807 above, the range extender system can achieve parallel control between power generation equipment and energy storage equipment under different operating conditions. Furthermore, it should be understood that the above disclosure is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution described in this application shall still fall within the scope of the technical solution of this application.

Claims

1. A parallel control method, characterized in that, In a controller for a power generation device used in a range extender system, the range extender system further includes an energy storage device electrically connected to the power generation device. The power generation device includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel switch, which are connected in sequence. One end of the first parallel switch is connected to a first parallel port of the power generation device. The first parallel port is used to connect to a second parallel port of the energy storage device via a cable. The parallel control method includes: Receive a start signal, and start the engine and the generator according to the start signal, so that the rectifier circuit outputs a first voltage; When the voltage of the first parallel port is determined to be a first preset threshold, the first parallel switch is controlled to close; in response to the closure of the first parallel switch, the voltage adjustment circuit is controlled to adjust the first voltage to a target voltage value so that the power generation equipment and the energy storage equipment can be paralleled; wherein, the target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation equipment; When the voltage of the first parallel port is determined to be the target voltage value, the system waits to receive the first control command sent by the energy storage device; in response to the first control command, the system controls the voltage adjustment circuit to adjust the first voltage to the target voltage value; after the voltage adjustment circuit outputs the target voltage value, the system controls the first parallel switch to close so that the power generation device and the energy storage device can be connected in parallel.

2. The parallel control method according to claim 1, characterized in that, After the voltage adjustment circuit adjusts the first voltage to the target voltage value, and before the power generation equipment and the energy storage equipment are connected in parallel, the method further includes: In response to the second control command received from the energy storage device, the first parallel switch is controlled to disconnect; Waiting to receive the first control command sent by the energy storage device, and upon receiving the first control command, controlling the voltage adjustment circuit to adjust the first voltage to the target voltage value in response to the first control command; After the voltage adjustment circuit outputs the target voltage value, it controls the first parallel switch to close.

3. The parallel control method according to claim 2, characterized in that, The power generation equipment further includes a first auxiliary power supply circuit, a first terminal of which is connected to the first parallel port, and a second terminal of which is electrically connected to the controller of the power generation equipment. Before receiving the start signal, the parallel control method further includes: When the voltage at the first parallel port is the target voltage value, the first auxiliary power supply circuit starts after receiving the voltage at the first parallel port and provides auxiliary power to the controller of the power generation equipment. In response to the activation of the controller of the power generation equipment, communication is established with the energy storage device.

4. The parallel control method according to claim 3, characterized in that, The first terminal of the first auxiliary power supply circuit is also electrically connected to the output terminal of the voltage adjustment circuit. Before waiting to receive the first control command sent by the energy storage device, the circuit further includes: In response to the second control command, the voltage adjustment circuit outputs a voltage that is a second preset threshold value; the second preset threshold value is greater than the target voltage value.

5. The parallel control method according to any one of claims 1-4, characterized in that, After waiting to receive the first control command sent by the energy storage device, the parallel operation control method further includes: If the first control command is not received within the set time period, a shutdown signal is output to the generator and the engine to shut down the engine and the generator.

6. The parallel control method according to any one of claims 1-4, characterized in that, The power generation equipment further includes a first pre-charging circuit connected in parallel with the first parallel switch, the first pre-charging circuit including a first protection resistor and a first pre-charging switch connected in series, and the parallel control method further includes: When the voltage difference across the first parallel switch is greater than a preset first difference threshold, the first precharge switch is controlled to close. When the voltage difference across the first parallel switch is less than or equal to the preset first difference threshold, the first parallel switch is controlled to close and the first precharge switch is controlled to open.

7. A parallel control method, characterized in that, In a controller for an energy storage device used in a range extender system, the range extender system further includes a power generation device electrically connected to the energy storage device. The energy storage device includes an energy storage circuit and a second parallel switch connected in sequence. One end of the second parallel switch is electrically connected to a second parallel port of the energy storage device. The second parallel port is connected to a first parallel port of the power generation device via a cable. The parallel control method includes: After the energy storage device is started, and when the voltage at the second parallel port is at a first preset threshold, the second parallel switch is controlled to close so that the voltage at the second parallel port reaches a target voltage value; wherein the target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation device; In response to the voltage at the second parallel port reaching the target voltage value, a start signal is sent to the power generation equipment to start the engine and generator in the power generation equipment; Send a first control command to the power generation equipment to enable the power generation equipment and the energy storage equipment to operate in parallel.

8. The parallel control method according to claim 7, characterized in that, The parallel control method further includes: After the energy storage device is started, and when the voltage of the second parallel port is not equal to the voltage of the first parallel port, a second control command is sent to the power generation device so that the voltage of the first parallel port is the first preset threshold. In response to the voltage of the first parallel port being equal to the first preset threshold, the second parallel switch is closed, and the voltage of the second parallel port is raised to the target voltage value. Then, a first control command is sent to the power generation equipment so that the voltage of the first parallel port is equal to the voltage of the second parallel port.

9. The parallel control method according to claim 7, characterized in that, The energy storage device further includes a second pre-charging circuit connected in parallel with the second parallel switch, the second pre-charging circuit including a second protection resistor and a second pre-charging switch connected in series, and the parallel control method further includes: When the voltage difference across the second parallel switch is greater than a preset second difference threshold, the second pre-charge switch is controlled to close. When the voltage difference across the second parallel switch is less than or equal to the preset second difference threshold, the second parallel switch is controlled to close and the second precharge switch is controlled to open.

10. The parallel control method according to claim 7, characterized in that, The energy storage device further includes a second auxiliary power supply circuit, a first terminal of which is electrically connected to the second parallel port, and a second terminal of which is electrically connected to the controller of the energy storage device. Before the energy storage device is started, the parallel control method further includes: When the voltage at the second parallel port is the target voltage value, the second auxiliary power supply circuit starts after receiving the voltage at the second parallel port and provides auxiliary power to the controller of the energy storage device. In response to the activation of the controller of the energy storage device, communication is established with the power generation device.

11. A parallel control method, characterized in that, This system is applied to a range extender system, which includes an energy storage device and a power generation device. The power generation device includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel switch, all electrically connected in sequence. One end of the first parallel switch is connected to a first parallel port of the power generation device. The energy storage device includes an energy storage circuit and a second parallel switch, all electrically connected in sequence. One end of the second parallel switch is electrically connected to a second parallel port of the energy storage device. The first parallel port is electrically connected to the second parallel port via a cable. The parallel control method includes: After the energy storage device is started, and when the voltage at the second parallel port is at a first preset threshold, the second parallel switch is controlled to close so that the voltage at the second parallel port reaches a target voltage value; wherein the target voltage value is greater than the first preset threshold and is greater than or equal to the parallel control voltage required by the power generation device; In response to the voltage at the second parallel port reaching the target voltage value, a start signal is sent to the power generation equipment; The power generation equipment receives the start signal and starts the engine and generator according to the start signal, so that the rectifier circuit outputs a first voltage; When the power generation equipment determines that the voltage at the first parallel port is the target voltage value, it waits to receive the first control command sent by the energy storage device. The energy storage device sends the first control command to the power generation device; In response to the first control command, the power generation equipment controls the voltage adjustment circuit to adjust the first voltage to the target voltage value; After the voltage adjustment circuit outputs the target voltage value, the power generation equipment controls the first parallel switch to close, so that the power generation equipment and the energy storage equipment can operate in parallel.

12. A power generation device, characterized in that, For connection to an energy storage device, the power generation device includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel switch connected in sequence. One end of the first parallel switch is connected to a first parallel port of the power generation device. The first parallel port is used to connect to a second parallel port of the energy storage device via a cable. The power generation device also includes a controller for executing the parallel control method according to any one of claims 1-6.

13. An energy storage device, characterized in that, For electrical connection with power generation equipment, the energy storage device includes an energy storage circuit and a second parallel switch connected in sequence. One end of the second parallel switch is electrically connected to a second parallel port of the energy storage device. The second parallel port is connected to a first parallel port of the power generation equipment via a cable. The energy storage device also includes a controller for the energy storage device. The controller of the energy storage device is used to execute the parallel control method according to any one of claims 7-10.

14. A range extender system, characterized in that, The range extender system includes energy storage equipment and power generation equipment; wherein... The power generation equipment includes an engine, a generator, a rectifier circuit, a voltage regulation circuit, and a first parallel switch connected in sequence. One end of the first parallel switch is connected to a first parallel port of the power generation equipment. The first parallel port is electrically connected to a second parallel port of the energy storage device via a cable. The power generation equipment also includes a controller for the power generation equipment, which is used to execute the parallel control method according to any one of claims 1-6. The energy storage device includes an energy storage circuit and a second parallel switch connected in sequence. One end of the second parallel switch is electrically connected to the second parallel port. The energy storage device also includes a controller for the energy storage device, which is used to execute the parallel control method according to any one of claims 7-10.

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