Electric power system

Abstract

An electric power system, comprising a new energy power generation module and a conventional energy power generation module. A first input end of a transfer switch module is adapted to be connected to the conventional energy power generation module, a second input end of the transfer switch module is adapted to be connected to a power grid, and the transfer switch module is adapted to close the first input end or the second input end; a first power interface of a control device is connected to the new energy power generation module, a second power interface of the control device is connected to the transfer switch module, and a power supply interface of the control device is adapted to be connected to electric loads; the control device is used for controlling an operation mode of the new energy power generation module on the basis of a first power supply load parameter of an output end of the transfer switch module and a second power supply load parameter of the input end of the transfer switch module.

Description

Power System

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 2024102179005 and application date of February 27, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present disclosure relates to the technical field of power systems, and in particular to a power system, an inverter, and a control method for the power system. Background Art

[0004] In areas with unstable power grids, renewable energy generation systems are often used to ensure reliable power during grid outages. Traditional energy systems, such as diesel generators, are also used as backup power sources. For systems with multiple power sources, an automatic transfer switch (ATS) is often installed to facilitate switching between them.

[0005] Currently, ATS is usually set up independently in the system, and additional wiring and connection are required when connecting to the power supply, which makes the wiring of the multi-source system complicated. In addition, the existing multi-source system cannot adjust the operating mode according to the power generation status of the system, resulting in low system stability.

[0006] Summary of the Invention

[0007] The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes a power system, an inverter, and a control method for the power system, which can ensure stable operation of the power system and reduce the wiring complexity and cost of the power system.

[0008] The present disclosure provides a power system, the system comprising:

[0009] New energy power generation module and traditional energy power generation module;

[0010] A transfer switch module, wherein a first input end of the transfer switch module is used to connect to the traditional energy generation module, a second input end of the transfer switch module is used to connect to the power grid, and the transfer switch module is used to close toward the first input end or toward the second input end;

[0011] A power supply load collection device, the power supply load collection device comprising a first power supply load collection device and a second power supply load collection device, the first power supply load collection device being arranged at the output end of the conversion switch module, for collecting a first power supply load parameter at the output end of the conversion switch module, the second power supply load collection device being arranged at the input end of the conversion switch module, for collecting a second power supply load parameter at the input end of the conversion switch module;

[0012] A control device, wherein the first power interface of the control device is connected to the new energy power generation module, the second power interface of the control device is connected to the conversion switch module, the power supply interface of the control device is used to connect to the power load, and the control device is also communicatively connected to the power supply load acquisition device;

[0013] The control device is used to control the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter, and the operation mode includes a grid-connected operation mode and an off-grid anti-backflow mode.

[0014] According to one embodiment of the present disclosure, the second power supply load parameter is the power supply load parameter corresponding to the first input end, and the control device is used to control the new energy power generation module to operate in the off-grid anti-backflow mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, or the control device is used to control the new energy power generation module to operate in the grid-connected operation mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error.

[0015] According to one embodiment of the present disclosure, the second power supply load parameter is the power supply load parameter corresponding to the second input end, and the control device is used to control the new energy power generation module to operate in the grid-connected operation mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, or the control device is used to control the new energy power generation module to operate in the off-grid anti-backflow mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error.

[0016] According to one embodiment of the present disclosure, the control device is used to reduce the operating power of the new energy power generation module and perform fault detection on the new energy power generation module when it is determined that the first power supply load parameter is less than or equal to the sampling accuracy error.

[0017] According to an embodiment of the present disclosure, the power supply load parameter is a current value, the first power supply load acquisition device is a first current sensor, and the second power supply load acquisition device is a second current sensor.

[0018] According to an embodiment of the present disclosure, the power supply load parameter is a power value, the first power supply load collection device is a first electricity meter, and the second power supply load collection device is a second electricity meter.

[0019] According to one embodiment of the present disclosure, the power supply load parameter is a power value, the first power supply load acquisition device is a third current sensor, and the second power supply load acquisition device is a fourth current sensor;

[0020] The control device is used to determine the corresponding power value based on the current values ​​collected by the third current sensor and the fourth current sensor;

[0021] Alternatively, a third electric meter is arranged between the control device and the conversion switch module, and the third electric meter is connected to the third current sensor and the fourth current sensor. The third electric meter is used to determine the corresponding power value based on the current values ​​collected by the third current sensor and the fourth current sensor, and output the power value to the control device.

[0022] According to one embodiment of the present disclosure, the control device is a control unit of the power system, or the control device is a control unit of an inverter to which the new energy power generation module is connected.

[0023] The present disclosure provides an inverter, wherein a first power interface of the inverter is connected to a new energy power generation module, a second power interface of the inverter is connected to a conversion switch module, and a power supply interface of the inverter is used to connect to an electrical load;

[0024] The first input end of the conversion switch module is used to connect to the traditional energy generation module, and the second input end of the conversion switch module is used to connect to the power grid. The conversion switch module is used to close to the first input end or to the second input end;

[0025] The inverter is further communicatively connected to a power supply load acquisition device, which includes a first power supply load acquisition device and a second power supply load acquisition device. The first power supply load acquisition device is provided at the output end of the conversion switch module and is used to acquire a first power supply load parameter at the output end of the conversion switch module. The second power supply load acquisition device is provided at the input end of the conversion switch module and is used to acquire a second power supply load parameter at the input end of the conversion switch module.

[0026] The inverter is used to control the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter, and the operation mode includes a grid-connected operation mode and an off-grid anti-backflow mode.

[0027] The present disclosure provides a control method for the above-mentioned power system, the method comprising:

[0028] Acquire a first power supply load parameter of an output end of a transfer switch module and a second power supply load parameter of an input end of the transfer switch module;

[0029] Based on the first power supply load parameter and the second power supply load parameter, the operation mode of the new energy power generation module is controlled, and the operation mode includes a grid-connected operation mode and an off-grid anti-backflow mode.

[0030] According to one embodiment of the present disclosure, the second power supply load parameter is a power supply load parameter corresponding to the first input end, and controlling the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter includes:

[0031] When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, controlling the new energy power generation module to operate in the off-grid anti-backflow mode;

[0032] Alternatively, when the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, the new energy power generation module is controlled to operate in the grid-connected operation mode.

[0033] According to one embodiment of the present disclosure, the second power supply load parameter is a power supply load parameter corresponding to the second input terminal, and controlling the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter includes:

[0034] When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, controlling the new energy power generation module to operate in the grid-connected operation mode;

[0035] Alternatively, when the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, the new energy power generation module is controlled to operate in the off-grid anti-backflow mode.

[0036] The present disclosure provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned power system control method when executing the computer program.

[0037] The present disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the control method of the power system as described above is implemented.

[0038] The present disclosure provides a computer program product, including a computer program, which implements the above-mentioned power system control method when executed by a processor.

[0039] The above-mentioned one or more technical solutions in the present disclosure have at least the following technical effects: by setting a power supply load acquisition device at the output end of the conversion switch module and the input end of the conversion switch module, a first power supply load parameter of the output end of the conversion switch module and a second power supply load parameter of the input end of the conversion switch module are collected, and the control device determines whether the current power system is connected to a traditional energy generation module or a power grid based on the first power supply load parameter and the second power supply load parameter, and adjusts the operation mode of the new energy generation module, which can ensure the stable operation of the power system, and the conversion switch module can be built into a traditional energy generation module such as a diesel generator, which can reduce the number of wiring corresponding to the conversion switch module, reduce the wiring complexity of the power system, and reduce costs. Additional aspects and advantages of the present disclosure will be partially given in the following description, and part will become obvious from the following description, or be understood through the practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] FIG1 is a schematic diagram of a structure of a power system according to an embodiment of the present disclosure;

[0042] FIG2 is a second structural diagram of a power system provided by an embodiment of the present disclosure;

[0043] FIG3 is a flow chart of a method for controlling a power system according to an embodiment of the present disclosure;

[0044] FIG4 is a second flow chart of a method for controlling a power system according to an embodiment of the present disclosure;

[0045] FIG5 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.

[0046] Reference numerals: power system 100 , new energy power generation module 110 , traditional energy power generation module 120 , transfer switch module 130 , control device 140 , power load 150 , first power supply load collection device 160 , second power supply load collection device 170 , power grid 200 , third electric meter 300 . DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0048] The terms "first", "second", etc. in the specification and claims of the present disclosure are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present disclosure can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects related to each other are in an "or" relationship.

[0049] The power system 100, inverter, control method of the power system 100, electronic device and readable storage medium provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0050] The power system 100 is a local system for producing and distributing electric energy. The power system 100 can operate independently of the grid 200 or in parallel with the grid, transmitting excess electric energy to the grid 200 or obtaining electric energy from the grid 200.

[0051] As shown in FIG1 , the power system 100 of the embodiment of the present disclosure includes a new energy power generation module 110 , a traditional energy power generation module 120 , a transfer switch module 130 , a power supply load collection device and a control device 140 .

[0052] The new energy power generation module 110 is a module used to convert new energy into electrical energy. The new energy power generation module 110 may include an energy conversion module and an inverter, etc. The new energy may be solar energy, wind energy, hydropower, etc. Accordingly, the new energy power generation module 110 may be a solar power generation module, a wind power generation module, a hydropower generation module, etc.

[0053] The traditional energy generation module 120 is a module that uses traditional energy to generate electricity. Traditional energy is mainly fossil fuels, such as coal, natural gas, oil, etc. The traditional energy generation module 120 can be a diesel generator.

[0054] In actual implementation, in the power system 100 , when the new energy power generation module 110 does not convert enough electricity, the traditional energy power generation module 120 can cooperate with the new energy power generation module 110 to provide power.

[0055] In this embodiment, the transfer switch module 130 may be an automatic transfer switch (ATS).

[0056] The first input end of the conversion switch module 130 is used to connect to the traditional energy generation module 120 , and the second input end of the conversion switch module 130 is used to connect to the power grid 200 .

[0057] The output end of the conversion switch module 130 can be connected to the grid-connected port of the new energy power generation module 110 .

[0058] It should be noted that the transfer switch module 130 can be built into the traditional energy generation module 120. For example, the traditional energy generation module 120 is a diesel generator, and the transfer switch module 130 is an automatic transfer switch provided by the diesel generator.

[0059] In this embodiment, the conversion switch module 130 is used to close to the first input end, or to close to the second input end, so that the traditional energy generation module 120 cooperates with the new energy generation module 110 to supply power, or to connect the power grid 200 to the power system 100, thereby realizing energy exchange between the power system 100 and the power grid 200.

[0060] It is understandable that the operation of the traditional energy generation module 120 and the access of the power grid 200 to the power system 100 do not occur at the same time. Of course, the new energy generation module 110 can also be powered independently without relying on the traditional energy generation module 120 and the power grid 200.

[0061] In actual implementation, the conversion switch module 130 is closed to the first input terminal, the traditional energy generation module 120 works, and is closed to the second input terminal, so that the power grid 200 is connected to the power system 100 .

[0062] For example, as shown in FIG. 1 , the transfer switch module 130 is closed toward the second input terminal, and the grid 200 is connected to the power system 100 .

[0063] In this embodiment, the power supply load collection device includes a first power supply load collection device 160 and a second power supply load collection device 170. The first power supply load collection device 160 is arranged at the output end of the conversion switch module 130, and is used to collect the first power supply load parameter of the output end of the conversion switch module 130. The second power supply load collection device 170 is arranged at the input end of the conversion switch module 130, and is used to collect the second power supply load parameter of the input end of the conversion switch module 130.

[0064] Among them, the power supply load acquisition device is a device for acquiring the power supply load parameters in the circuit. The power supply load parameters can characterize the power supply characteristics of the corresponding circuit. The power supply load parameters can be power values ​​or current values. Accordingly, the power supply load acquisition device can be a current acquisition device or a power acquisition device.

[0065] It should be noted that the power value may be the power value of each phase or the total power value, and the current value may be the current value of each phase or the total current value.

[0066] It should be noted that the second power supply load acquisition device 170 can be provided at the first input terminal of the conversion switch module 130, and the second power supply load parameter acquired is the power supply load parameter corresponding to the first input terminal;

[0067] The second power supply load acquisition device 170 may be provided at the second input end of the conversion switch module 130 , and the acquired second power supply load parameter is the power supply load parameter corresponding to the second input end.

[0068] For example, as shown in FIG1 , the second power supply load acquisition device 170 is provided at the second input end of the conversion switch module 130 to acquire power supply load parameters corresponding to the second input end.

[0069] In this embodiment, the first power interface of the control device 140 is connected to the new energy power generation module 110, the second power interface of the control device 140 is connected to the conversion switch module 130, and the power supply interface of the control device 140 is used to connect the power load 150.

[0070] Among them, the first power interface of the control device 140 is connected to the new energy power generation module 110 to perform energy scheduling control on the new energy power generation module 110, and the second power interface of the control device 140 is connected to the conversion switch module 130 to control the start and stop of the conversion switch module 130. In addition, the control device 140 can adjust the power supply output to the power load 150 according to the received power supply load parameters to ensure the stability and continuity of the power supply.

[0071] The power supply interface of the control device 140 is connected to the power load 150, and the power supply output to the power load 150 is controlled through the power supply interface. The power load 150 is an electrical device that consumes electric energy, such as household appliances, production equipment, security monitoring systems, etc.

[0072] In this embodiment, the control device 140 is further connected to the power supply load acquisition device for communication, and the power supply load parameters acquired by the power supply load acquisition device can be transmitted to the control device 140 .

[0073] In this embodiment, the control device 140 is used to control the operation mode of the new energy power generation module 110 based on the first power supply load parameter and the second power supply load parameter. The operation modes include a grid-connected operation mode and an off-grid anti-backflow mode.

[0074] In actual implementation, based on the first power supply load parameter and the second power supply load parameter, it is determined whether the traditional energy power generation module 120 is currently working or the power grid 200 is connected to the power system 100. When the traditional energy power generation module 120 is working, the operation mode of the new energy power generation module 110 is controlled to be an off-grid anti-backflow mode. When the power grid 200 is connected to the power system 100, the operation mode of the new energy power generation module 110 is controlled to be a grid-connected operation mode.

[0075] The grid-connected operation mode is a mode in which the new energy power generation module 110 is connected to the power grid 200 for joint operation. The new energy power generation module 110 can feed back excess electric energy to the power grid 200 .

[0076] The off-grid anti-backflow mode is an operation mode adopted to prevent the current from flowing back to the grid 200 when the generated power is greater than the load power, thereby protecting the grid 200 from being damaged by overcurrent.

[0077] According to the power system 100 disclosed in the present invention, a power supply load collection device is set at the output end of the conversion switch module 130 and the input end of the conversion switch module 130 to collect the first power supply load parameter of the output end of the conversion switch module 130 and the second power supply load parameter of the input end of the conversion switch module 130. The control device 140 determines whether the current power system 100 is connected to the traditional energy generation module 120 or the power grid 200 based on the first power supply load parameter and the second power supply load parameter, and adjusts the operation mode of the new energy generation module 110, which can ensure the stable operation of the power system 100. The conversion switch module 130 can be built into the traditional energy generation module 120 such as the diesel generator, which can reduce the number of wiring corresponding to the conversion switch module 130, reduce the wiring complexity of the power system 100, and reduce the cost.

[0078] In some embodiments, the second power supply load parameter is the power supply load parameter corresponding to the first input end, and the control device 140 is used to control the new energy power generation module 110 to operate in an off-grid anti-backflow mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, or the control device 140 is used to control the new energy power generation module 110 to operate in a grid-connected operation mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error.

[0079] The second power supply load parameter is the corresponding power supply load parameter collected by the second power supply load collection device 170 at the first input end of the conversion switch module 130 . The second power supply load parameter can characterize the power supply characteristics of the circuit where the traditional energy generation module 120 is located.

[0080] In this embodiment, errors will inevitably occur when collecting the power supply load parameter. When the first power supply load parameter is greater than the sampling accuracy error, the first power supply load parameter is considered to be a reliable value.

[0081] In this embodiment, the parameter difference threshold is a pre-set value close to 0. When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold, it indicates that the current value or power value of the circuit where the traditional energy power generation module 120 is located is close to the current value or power value between the control device 140 and the conversion switch module 130, indicating that the conversion switch module 130 is closed to the first input end at this time, and the traditional energy power generation module 120 is working.

[0082] When the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold, it indicates that the current value or power value of the circuit where the traditional energy power generation module 120 is located and the current value or power value between the control device 140 and the conversion switch module 130 are significantly different, and there may be no current passing through the circuit where the traditional energy power generation module 120 is located, indicating that at this time the conversion switch module 130 is closed to the second input end, and the power grid 200 is connected to the power system 100.

[0083] In some embodiments, the second power supply load parameter is the power supply load parameter corresponding to the second input end, and the control device 140 is used to control the new energy power generation module 110 to operate in a grid-connected operation mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, or the control device 140 is used to control the new energy power generation module 110 to operate in an off-grid anti-backflow mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error.

[0084] The second power supply load parameter is a corresponding power supply load parameter collected by the second power supply load collection device 170 at the second input end of the conversion switch module 130 . The second power supply load parameter can represent the power supply characteristics of the circuit where the power grid 200 is located.

[0085] In this embodiment, errors will inevitably occur when collecting the power supply load parameter. When the first power supply load parameter is greater than the sampling accuracy error, the first power supply load parameter is considered to be a reliable value.

[0086] In this embodiment, the parameter difference threshold is a pre-set value. When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold, it indicates that the current value or power value of the circuit in which the power grid 200 is located is close to the current value or power value between the control device 140 and the conversion switch module 130, indicating that the conversion switch module 130 is closed to the second input end at this time, and the power grid 200 is connected to the power system 100.

[0087] When the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold, it indicates that the current value or power value of the circuit where the power grid 200 is located and the current value or power value between the control device 140 and the conversion switch module 130 are significantly different, and there may be no current passing through the circuit where the power grid 200 is located, indicating that at this time the conversion switch module 130 is closed to the first input end and the traditional energy generation module 120 is working.

[0088] In some embodiments, the control device 140 is used to reduce the operating power of the new energy power generation module 110 and perform fault detection on the new energy power generation module 110 when it is determined that the first power supply load parameter is less than or equal to the sampling accuracy error.

[0089] In this embodiment, when the first power supply load parameter is less than or equal to the sampling accuracy error, the first power supply load parameter is considered unreliable. After reducing the operating power of the new energy power generation module 110, a fault detection is performed on the new energy power generation module 110 to check whether the first power supply load parameter is less than or equal to the sampling accuracy error due to a fault in the new energy power generation module 110.

[0090] In actual implementation, when the new energy power generation module 110 is in operation, the output power of the new energy power generation module 110 can be reduced. If there is a battery in the power system 100, the battery can be charged with low power for fault detection.

[0091] In some embodiments, the power supply load parameter is a current value, the first power supply load acquisition device 160 is a first current sensor, and the second power supply load acquisition device 170 is a second current sensor.

[0092] The current sensor is a device that can collect the current value in the circuit, such as a current transformer (CT).

[0093] In this embodiment, the control device 140 controls the operation mode of the new energy power generation module 110 based on the current value collected by the first current sensor and the current value collected by the second current sensor.

[0094] It should be noted that when the current sensor collects the current value, the current sensor may be reversely connected. When the current sensor is reversely connected, the absolute value of the collected current value is taken for calculation.

[0095] In some embodiments, the power supply load parameter is a power value, the first power supply load collection device 160 is a first electric meter, and the second power supply load collection device 170 is a second electric meter.

[0096] Among them, the electric meter is a device that can collect the power value in the circuit.

[0097] In this embodiment, the control device 140 controls the operation mode of the new energy power generation module 110 based on the power value collected by the first electricity meter and the power value collected by the second electricity meter.

[0098] In some embodiments, the power supply load parameter is a power value, the first power supply load acquisition device 160 is a third current sensor, and the second power supply load acquisition device 170 is a fourth current sensor;

[0099] The control device 140 is configured to determine a corresponding power value based on the current values ​​collected by the third current sensor and the fourth current sensor;

[0100] Alternatively, a third electric meter 300 is arranged between the control device 140 and the conversion switch module 130, and the third electric meter 300 is connected to the third current sensor and the fourth current sensor. The third electric meter 300 is used to determine the corresponding power value based on the current value collected by the third current sensor and the fourth current sensor, and output the power value to the control device 140.

[0101] In actual implementation, the control device 140 may have a built-in electric meter, which determines the corresponding power value according to the current values ​​collected by the third current sensor and the fourth current sensor.

[0102] In this embodiment, as shown in FIG2 , the third electric meter 300 is an electric meter external to the control device 140 . The third electric meter 300 can receive current values ​​collected by the third current sensor and the fourth current sensor, and determine a power value corresponding to the current value.

[0103] In actual implementation, after the third electric meter 300 determines the power value corresponding to the current value, it can transmit the power value to the control device 140 via a communication standard such as RS485.

[0104] In some embodiments, the control device 140 is a control unit of the power system 100 , or the control device 140 is a control unit of an inverter to which the new energy power generation module 110 is connected.

[0105] The control unit 140 of the power system 100 is a control unit independent of the inverter. The control unit of the inverter is a control unit arranged inside the inverter. The control unit may be integrated with a corresponding algorithm for controlling the operation mode of the power system 100 .

[0106] The embodiment of the present disclosure also provides an inverter.

[0107] The first power interface of the inverter is connected to the new energy power generation module, the second power interface of the inverter is connected to the conversion switch module, and the power supply interface of the inverter is used to connect to the power load;

[0108] The first input end of the conversion switch module is used to connect to the traditional energy generation module, and the second input end of the conversion switch module is used to connect to the power grid. The conversion switch module is used to close to the first input end or to close to the second input end;

[0109] The inverter is also in communication connection with a power supply load acquisition device, which includes a first power supply load acquisition device and a second power supply load acquisition device. The first power supply load acquisition device is provided at the output end of the conversion switch module and is used to acquire a first power supply load parameter at the output end of the conversion switch module. The second power supply load acquisition device is provided at the input end of the conversion switch module and is used to acquire a second power supply load parameter at the input end of the conversion switch module.

[0110] The inverter is used to control the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter. The operation modes include a grid-connected operation mode and an off-grid anti-backflow mode.

[0111] According to the inverter disclosed in the present invention, a power supply load collection device is provided at the output end of the conversion switch module 130 and the input end of the conversion switch module 130 to collect a first power supply load parameter of the output end of the conversion switch module 130 and a second power supply load parameter of the input end of the conversion switch module 130. The control device 140 determines whether the current power system 100 is connected to the traditional energy generation module 120 or the power grid 200 based on the first power supply load parameter and the second power supply load parameter, and adjusts the operation mode of the new energy generation module 110, thereby ensuring the stable operation of the power system 100. The conversion switch module 130 can be built into the traditional energy generation module 120 such as the diesel generator, which can reduce the number of wiring corresponding to the conversion switch module 130, reduce the wiring complexity of the power system 100, and reduce the cost.

[0112] The embodiment of the present disclosure also provides a control method based on the above-mentioned power system 100.

[0113] The control method of the power system 100 may be applied to a terminal, and may be specifically executed by hardware or software in the terminal.

[0114] The control method of the power system 100 provided in the embodiment of the present disclosure may be executed by an electronic device or a functional module or functional entity in the electronic device that can implement the control method of the power system 100. The electronic devices mentioned in the embodiment of the present disclosure include but are not limited to computers, etc. The control method of the power system 100 provided in the embodiment of the present disclosure is described below using the electronic device as an example of the execution subject.

[0115] As shown in FIG3 , the control method of the power system 100 includes steps 310 and 320 .

[0116] Step 310: Acquire a first power supply load parameter of the output end of the transfer switch module 130 and a second power supply load parameter of the input end of the transfer switch module 130;

[0117] Step 320: Based on the first power supply load parameter and the second power supply load parameter, the operation mode of the new energy power generation module 110 is controlled. The operation modes include a grid-connected operation mode and an off-grid anti-backflow mode.

[0118] According to the power system 100 disclosed in the present invention, a power supply load collection device is set at the output end of the conversion switch module 130 and the input end of the conversion switch module 130 to collect the first power supply load parameter of the output end of the conversion switch module 130 and the second power supply load parameter of the input end of the conversion switch module 130. The control device 140 determines whether the current power system 100 is connected to the traditional energy generation module 120 or the power grid 200 based on the first power supply load parameter and the second power supply load parameter, and adjusts the operation mode of the new energy generation module 110, which can ensure the stable operation of the power system 100. The conversion switch module 130 can be built into the traditional energy generation module 120 such as the diesel generator, which can reduce the number of wiring corresponding to the conversion switch module 130, reduce the wiring complexity of the power system 100, and reduce the cost.

[0119] In some embodiments, the second power supply load parameter is a power supply load parameter corresponding to the first input end. Based on the first power supply load parameter and the second power supply load parameter, controlling the operation mode of the new energy power generation module 110 includes:

[0120] When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, the new energy power generation module 110 is controlled to operate in the off-grid anti-backflow mode;

[0121] Alternatively, when the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, the new energy power generation module 110 is controlled to operate in the grid-connected operation mode.

[0122] In some embodiments, the second power supply load parameter is a power supply load parameter corresponding to the second input terminal. Based on the first power supply load parameter and the second power supply load parameter, controlling the operation mode of the new energy power generation module 110 includes:

[0123] When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, controlling the new energy power generation module 110 to operate in the grid-connected operation mode;

[0124] Alternatively, when the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, the new energy power generation module 110 is controlled to operate in an off-grid anti-backflow mode.

[0125] A specific embodiment of the control method of the power system 100 is given below.

[0126] As shown in FIG4 , step 1 is to obtain the current value I at the output end of the switching module 130. CT1, and the current value I of the second input terminal of the conversion switch module 130 CT2 , and calculate the absolute value |I CT1 |、|I CT2 |.

[0127] Step 2: Determine whether |I CT1 |-|I CT2 | is less than the parameter difference threshold, and |I CT1 |Greater than the sampling precision error.

[0128] Step 3: In |I CT1 |-|I CT2 | is less than the parameter difference threshold and |I CT1 When the error is greater than the sampling accuracy error, it is determined that the power grid 200 is connected to the power system 100, and the new energy power generation module 110 is controlled to operate in the grid-connected operation mode.

[0129] Step 4: In |I CT1 |-|I CT2 |greater than or equal to the parameter difference threshold and |I CT1 When the error is greater than the sampling accuracy error, it is determined that the traditional energy generation module 120 cooperates with the new energy generation module 110 to supply power, and the new energy generation module 110 is controlled to operate in an off-grid anti-backflow mode.

[0130] In some embodiments, as shown in Figure 5, the embodiment of the present disclosure also provides an electronic device 500, including a processor 501, a memory 502, and a computer program stored in the memory 502 and executable on the processor 501. When the program is executed by the processor 501, each process of the control method embodiment of the above-mentioned power system 100 is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0131] It should be noted that the electronic devices in the embodiments of the present disclosure include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0132] For example, the electronic device 500 can be a data acquisition device for collecting power supply load parameters, the electronic device 500 can be a communication device for transmitting the power supply load parameters to a unit such as the control device 140, and the electronic device 500 can be an energy efficiency management device for performing energy management on the power system 100 based on the power supply load parameters.

[0133] The electronic device 500 can also be a power conversion device for adjusting the motor speed of the generator in the power system 100. The electronic device 500 can also be an energy integration device for integrating new energy into the power grid. The electronic device 500 can also be an energy storage management device for monitoring and managing the performance of the power system, etc.

[0134] The embodiment of the present disclosure also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the control method embodiment of the above-mentioned power system 100 are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0135] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0136] The embodiment of the present disclosure further provides a computer program product, including a computer program, which implements the control method of the power system 100 when executed by a processor.

[0137] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0138] An embodiment of the present disclosure further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned control method embodiment of the power system 100, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0139] It should be understood that the chip mentioned in the embodiments of the present disclosure can also be called a system-level chip, a system chip, a chip system, or a system-on-chip chip, etc.

[0140] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present disclosure is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0141] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present disclosure.

[0142] The embodiments of the present disclosure are described above in conjunction with the accompanying drawings, but the present disclosure is not limited to the above-mentioned specific implementation methods. The above-mentioned implementation methods are merely illustrative and not restrictive. Under the guidance of the present disclosure, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present disclosure and the claims, all of which are protected by the present disclosure.

[0143] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0144] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A power system, wherein: include: New energy power generation module and traditional energy power generation module; A transfer switch module, wherein a first input end of the transfer switch module is used to connect to the traditional energy generation module, a second input end of the transfer switch module is used to connect to the power grid, and the transfer switch module is used to close toward the first input end or toward the second input end; A power supply load collection device, the power supply load collection device comprising a first power supply load collection device and a second power supply load collection device, the first power supply load collection device being arranged at the output end of the conversion switch module, for collecting a first power supply load parameter at the output end of the conversion switch module, the second power supply load collection device being arranged at the input end of the conversion switch module, for collecting a second power supply load parameter at the input end of the conversion switch module; A control device, wherein the first power interface of the control device is connected to the new energy power generation module, the second power interface of the control device is connected to the conversion switch module, the power supply interface of the control device is used to connect to the power load, and the control device is also communicatively connected to the power supply load acquisition device; The control device is used to control the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter, and the operation mode includes a grid-connected operation mode and an off-grid anti-backflow mode.

2. The power system according to claim 1, wherein: The second power supply load parameter is the power supply load parameter corresponding to the first input end. The control device is used to control the new energy power generation module to operate in the off-grid anti-backflow mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error. Alternatively, the control device is used to control the new energy power generation module to operate in the grid-connected operation mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error.

3. The power system according to claim 1, wherein: The second power supply load parameter is the power supply load parameter corresponding to the second input end. The control device is used to control the new energy power generation module to operate in the grid-connected operation mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error. Alternatively, the control device is used to control the new energy power generation module to operate in the off-grid anti-backflow mode when it is determined that the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error.

4. The power system according to any one of claims 1 to 3, wherein: The control device is used to reduce the operating power of the new energy power generation module and perform fault detection on the new energy power generation module when it is determined that the first power supply load parameter is less than or equal to the sampling accuracy error.

5. The power system according to any one of claims 1 to 4, wherein: The power supply load parameter is a current value, the first power supply load acquisition device is a first current sensor, and the second power supply load acquisition device is a second current sensor.

6. The power system according to any one of claims 1 to 4, wherein: The power supply load parameter is a power value, the first power supply load acquisition device is a first electric meter, and the second power supply load acquisition device is a second electric meter.

7. The power system according to any one of claims 1 to 4, wherein: The power supply load parameter is a power value, the first power supply load acquisition device is a third current sensor, and the second power supply load acquisition device is a fourth current sensor; The control device is used to determine the corresponding power value based on the current values ​​collected by the third current sensor and the fourth current sensor; Alternatively, a third electric meter is arranged between the control device and the conversion switch module, and the third electric meter is connected to the third current sensor and the fourth current sensor. The third electric meter is used to determine the corresponding power value based on the current values ​​collected by the third current sensor and the fourth current sensor, and output the power value to the control device.

8. The power system according to any one of claims 1 to 7, wherein: The control device is a control unit of the power system, or the control device is a control unit of an inverter connected to the new energy power generation module.

9. An inverter, wherein: The first power interface of the inverter is connected to the new energy power generation module, the second power interface of the inverter is connected to the conversion switch module, and the power supply interface of the inverter is used to connect to the power load; The first input end of the conversion switch module is used to connect to the traditional energy generation module, and the second input end of the conversion switch module is used to connect to the power grid. The conversion switch module is used to close to the first input end or to the second input end; The inverter is further communicatively connected to a power supply load acquisition device, which includes a first power supply load acquisition device and a second power supply load acquisition device. The first power supply load acquisition device is provided at the output end of the conversion switch module and is used to acquire a first power supply load parameter at the output end of the conversion switch module. The second power supply load acquisition device is provided at the input end of the conversion switch module and is used to acquire a second power supply load parameter at the input end of the conversion switch module. The inverter is used to control the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter, and the operation mode includes a grid-connected operation mode and an off-grid anti-backflow mode.

10. A control method for a power system according to any one of claims 1 to 8, wherein: include: Acquire a first power supply load parameter of an output end of a transfer switch module and a second power supply load parameter of an input end of the transfer switch module; Based on the first power supply load parameter and the second power supply load parameter, the operation mode of the new energy power generation module is controlled, and the operation mode includes a grid-connected operation mode and an off-grid anti-backflow mode.

11. The method for controlling the electric power system according to claim 10, wherein: The second power supply load parameter is a power supply load parameter corresponding to the first input end, and controlling the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter includes: When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, controlling the new energy power generation module to operate in the off-grid anti-backflow mode; Alternatively, when the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, the new energy power generation module is controlled to operate in the grid-connected operation mode.

12. The method for controlling the electric power system according to claim 10, wherein: The second power supply load parameter is a power supply load parameter corresponding to the second input end, and controlling the operation mode of the new energy power generation module based on the first power supply load parameter and the second power supply load parameter includes: When the difference between the first power supply load parameter and the second power supply load parameter is less than the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, controlling the new energy power generation module to operate in the grid-connected operation mode; Alternatively, when the difference between the first power supply load parameter and the second power supply load parameter is greater than or equal to the parameter difference threshold and the first power supply load parameter is greater than the sampling accuracy error, the new energy power generation module is controlled to operate in the off-grid anti-backflow mode.

13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the control method of the power system according to any one of claims 10 to 12 is implemented.

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