Wireless remote self-synchronizing parallel operation and grid connection control system and control method

Abstract

The invention discloses a wireless long-distance self-synchronizing parallel operation and grid connection control system and a control method. The system comprises a first device, a first wireless detection device, a second device, a second wireless detection device and a network connection platform, the first device and the first wireless detection device transmit power grid electric energy parameter signals through wireless communication; real-time signal transmission is carried out between the first device and the network connection platform through a network, and an electric energy parameter signal and a voltage frequency adjustment and power distribution control signal of the first device are transmitted; the second device is in wireless communication with the second wireless detection device; the second device and the network connection platform carry out real-time signal transmission through a network, and electric energy parameter signals and voltage frequency adjustment and power distribution control signals of the second device are transmitted. According to the invention, remote parallel-operation wireless communication of multiple devices can be realized for parallel-operation and grid-connected synchronous control and load distribution control, and the field working efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent control of power generation device parallel connection and grid connection, and in particular to a wireless long-distance self-synchronous parallel connection and grid connection control system and a control method. Background Art

[0002] In recent years, in order to improve the reliability of power supply and reduce the number of households affected by power outages, power grid companies have increased the requirements for the application of power supply vehicles and non-stop maintenance. At present, the conventional equipment is mainly medium-voltage power supply vehicles, with power mainly between 1000kW and 2000kW, and voltage levels mainly 10kV and 20kV. With the continuous expansion of the scope of operation, power grid companies have increased the requirements for the application of low-voltage power supply vehicles in the field of non-stop maintenance. With the large-scale application of medium and low voltage power supply vehicles, some problems in the use process have gradually emerged. At present, the existing diesel generator power supply vehicles in China, both medium-voltage and low-voltage generator vehicles, are gradually equipped with the functions of parallel connection and secondary grid connection. The function of parallel connection is to expand the capacity of multiple generator vehicles, and the main function of the grid connection and secondary grid connection function is to be used for non-stop maintenance; in the actual operation process of parallel connection, it is necessary to connect the communication lines of multiple vehicles and match the communication parameters; in the actual operation process of grid connection and secondary grid connection, there are problems such as thick power cables, inconvenient live connection, and the secondary grid connection point is far away from the operation position and cannot be used for secondary grid connection signal collection, etc., resulting in high intensity of non-stop maintenance work, and it is impossible to promote and apply on a large scale, and some cannot even realize real non-stop maintenance operations. The above problems are the key obstacles to the promotion and application of functions such as grid connection and capacity expansion operations of generator vehicles and non-stop maintenance operations. Summary of the invention

[0003] The technical problem to be solved by the present invention is: currently, more and more mobile or fixed power generation equipment is required to have parallel and grid-connected control functions. The existing technical mode adopts a relatively primitive wired detection method of power cables or control cables, and the actual operation is relatively troublesome. It is necessary to adopt a more complicated live operation method, which cannot solve the problem of long-distance access points. The power generation equipment needs to be near the access point, which cannot meet the actual needs of existing power equipment for parallel and grid-connected operation. Therefore, a wireless long-distance self-synchronous parallel and grid-connected control system and control method are provided.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A wireless long-distance self-synchronization parallel machine and grid control system, comprising:

[0006] A first device, a first wireless detection device, a second device, a second wireless detection device and a networked platform.

[0007] The first device and the first wireless detection device transmit the power parameter signal of the power grid through wireless communication; the first device and the networked platform transmit real-time signals through the network, transmitting the power parameter signal of the first device and the voltage and frequency adjustment, and power distribution control signal; the second device and the second wireless detection device communicate wirelessly; the second device and the networked platform transmit real-time signals through the network, transmitting the power parameter signal of the second device and the voltage and frequency adjustment, and power distribution control signal.

[0008] Among them, the first device includes a first speed controller, a first voltage controller, a first switch, a first mutual inductor, a first synchronous controller, a second mutual inductor, a first network terminal module, a first wireless receiver, a second synchronous controller and a first synchronous follower module.

[0009] The first wireless detection device includes a third mutual inductor and a first transmitter.

[0010] The second device includes a second speed controller, a second voltage controller, a second switch, a fourth mutual inductor, a third synchronous controller, a fifth mutual inductor, a second network terminal module, a second wireless receiver, a fourth synchronous controller and a second synchronous follower module.

[0011] The second wireless detection device includes a sixth mutual inductor and a second transmitter.

[0012] Furthermore, the first networked terminal module and the networked platform perform real-time signal transmission through the network; the second networked terminal module and the networked platform perform real-time signal transmission through the network.

[0013] Furthermore, the third mutual inductor is connected to the first transmitter via a connecting conductor and performs signal transmission; the third mutual inductor includes a lead-out conductor, which is connected to a power grid.

[0014] Furthermore, the sixth mutual inductor is connected to the second transmitter via a connecting conductor and performs signal transmission; the sixth mutual inductor includes a lead-out conductor, which is connected to a power grid.

[0015] Furthermore, the first speed controller is connected to the first voltage regulating controller, and is respectively connected to the first synchronous controller, the first networked terminal module, the first wireless receiver and the second synchronous controller; the first synchronous controller is respectively connected to the first switch, the first mutual inductor, the second mutual inductor, the first networked terminal module, the first wireless receiver and the second synchronous controller; the first networked terminal module is respectively connected to the first wireless receiver and the second synchronous controller; the first wireless receiver is connected to the second synchronous controller; and the first synchronous follower module is connected to the second synchronous controller.

[0016] Furthermore, the second speed controller is connected to the second voltage regulating controller, and is respectively connected to the third synchronous controller, the second networked terminal module, the second wireless receiver and the fourth synchronous controller; the third synchronous controller is respectively connected to the second switch, the fourth mutual inductor, the fifth mutual inductor, the second networked terminal module, the second wireless receiver and the fourth synchronous controller; the second networked terminal module is respectively connected to the second wireless receiver and the fourth synchronous controller; the second wireless receiver is connected to the fourth synchronous controller; and the second synchronous follower module is connected to the fourth synchronous controller.

[0017] Furthermore, the first synchronous controller is respectively connected to the first speed controller, the first voltage controller, the first switch, the first mutual inductor, and the second mutual inductor through connecting conductors.

[0018] The second synchronization controller is connected to the first synchronization follower module and the first wireless receiver respectively through connecting conductors.

[0019] The third synchronous controller is connected to the second speed regulating controller, the second voltage regulating controller, the second switch, the fourth mutual inductor and the fifth mutual inductor respectively through connecting conductors.

[0020] The fourth synchronization controller is connected to the third synchronization follower module and the second wireless receiver respectively through connecting conductors.

[0021] Furthermore, the first wireless detection device communicates wirelessly with the first device via the first transmitter and the first wireless receiver; the second wireless detection device communicates wirelessly with the second device via the second transmitter and the second wireless receiver.

[0022] Furthermore, the present invention also proposes a wireless long-distance self-synchronization and grid-connection control method, which includes three modes:

[0023] Wireless self-synchronous grid-connected control mode, wireless self-synchronous parallel control mode and wireless self-synchronous parallel grid-connected control mode; wherein the wireless self-synchronous parallel grid-connected control mode is a combination of the wireless self-synchronous grid-connected control mode and the wireless self-synchronous parallel control mode.

[0024] In the wireless self-synchronous grid-connected control mode, the first mutual inductor is connected to the grid load through a connecting conductor; the first wireless detection device is connected to the grid power supply by being hung on the line; the first mutual inductor detects the mains signal to obtain the mains voltage and frequency, the second mutual inductor detects the electrical signal of the generator to obtain the unit voltage and frequency, the obtained voltage and frequency are transmitted to the first synchronous controller for quasi-synchronous control, the mains voltage is compared with the unit voltage, the mains frequency is compared with the unit frequency, the speed regulation and voltage regulation electrical signals are obtained, and the first speed regulation controller and the first voltage regulation controller are respectively controlled to adjust the output voltage and frequency of the generator to keep them consistent with the voltage and frequency of the grid; the first synchronous controller captures the phase angle, outputs the switch closing control electrical signal, and controls the first switch to perform grid-connected operation; at this time, the online switch is disconnected.

[0025] When power is restored, the third mutual inductor is used to detect the voltage and frequency of the power grid, and the voltage and frequency signals are transmitted to the first wireless receiver through the first transmitter; the first wireless receiver receives the signal and converts the signal into an electrical signal recognized by the controller, and then transmits it to the second synchronous controller; the second synchronous controller obtains the electrical signal of the power generation device of the second mutual inductor from the first synchronous controller by communication, compares the difference between the signal and the electrical signal recognized by the controller, and outputs speed regulation and voltage regulation control signals to control the first speed regulation controller and the first voltage regulation controller to adjust the output voltage and frequency of the power generation device respectively; the second synchronous controller captures the phase angle, outputs the switch closing control electrical signal, and controls the first synchronous follower module to perform synchronous following; at this time, the online switch is closed.

[0026] In the wireless self-synchronous parallel control mode, the first device and the second device are adaptively matched in parallel on the network platform through the first network terminal module and the second network terminal module respectively; the first switch of the first device and the second switch of the second device are connected to the grid load respectively; the first device and the second device are started, the first switch is closed, and the second mutual inductor transmits the electrical signal of the first power generation device to the network platform through the network using the first synchronous controller and the first network terminal module, and the fifth mutual inductor transmits the electrical signal of the second power generation device to the network platform through the network using the third synchronous controller and the second network terminal module; the network platform outputs a control electrical signal by comparing the difference between the electrical signals of the two power generation devices; the control electrical signal is transmitted to the network platform through the network. The signal is transmitted to the first synchronous controller and the third synchronous controller through the first network terminal module and the second network terminal module, and the signal is converted and output to control the first speed regulating controller and the second speed regulating controller to adjust the speed, the first voltage regulating controller and the second voltage regulating controller to adjust the voltage, and then adjust the voltage and frequency of the first device and the second device so that the voltage and frequency of the first device and the second device are consistent; the phase angle is captured, and the network platform outputs an electrical signal to control the switch to control the closing of the second switch. After the closing is completed, the electrical signal of the control switch controls the first synchronous controller and the third synchronous controller to distribute the grid load, and the grid load distribution is automatically proportionally distributed according to the capacity of the first device and the second device.

[0027] In the wireless self-synchronous parallel-machine and grid-connected control mode, the first device and the second device are connected to the power grid, and the electrical signal for controlling load distribution output by the network connection platform controls the first synchronous controller and the third synchronous controller to distribute the power grid load and disconnect the online switch; when power is restored, the voltage and frequency signals are transmitted through the first wireless detection device or the second wireless detection device, and the grid is connected through the second synchronous controller or the fourth synchronous controller, and the synchronization is followed by the first synchronous follower module or the second synchronous follower module, and the online switch is closed; the parallel-machine and grid-connected operation is realized.

[0028] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0029] 1. The present invention can complete automatic matching and parallel communication using wireless signals, and can realize long-distance wireless communication of multiple devices for parallel synchronization and load distribution; in addition, wireless signals are used for secondary grid-connected signal collection, and there is no need to connect power cables for signal collection and grid-connected operations, thereby improving on-site work efficiency.

[0030] 2. When the grid connection point is far away from the operation location, the secondary grid connection operation can be completed, which can expand the existing operation scenarios and application scope of parallel operation and enable this operation method to be promoted and applied on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a principle block diagram of the wireless self-synchronous grid-connected control system of the present invention.

[0032] Figure 2 It is a principle block diagram of the wireless self-synchronous parallel control system of the present invention.

[0033] Figure 3 It is a principle block diagram of the wireless self-synchronous parallel machine and grid-connected control system of the present invention.

[0034] Figure numerals: 1, grid load; 2, online switch; 3, grid power supply; 16, first device; 17, second device; 18, network platform; 19, first wireless detection device; 20, second wireless detection device; 1-4, third transformer; 1-5, first transmitter; 1-6, first speed controller; 1-7, first voltage controller; 1-8, first switch; 1-9, first transformer; 1-10, first synchronization controller; 1-11, second transformer; 1-12, first network terminal module; 1-1 3. The first wireless receiver; 1-14. The second synchronous controller; 1-15. The first synchronous follower module; 2-4. The sixth mutual inductor; 2-5. The second transmitter; 2-6. The second speed control controller; 2-7. The second voltage control controller; 2-8. The second switch; 2-9. The fourth mutual inductor; 2-10. The third synchronous controller; 2-11. The fifth mutual inductor; 2-12. The second network terminal module; 2-13. The second wireless receiver; 2-14. The fourth synchronous controller; 2-15. The second synchronous follower module. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0036] To achieve the above object, the present invention proposes a wireless long-distance self-synchronization parallel machine and grid control system, comprising:

[0037] The first device 16 , the first wireless detection device 19 , the second device 17 , the second wireless detection device 20 and the network platform 18 .

[0038] The first device 16 and the first wireless detection device 19 transmit the power parameter signal of the power grid through wireless communication; the first device 16 and the networked platform 18 perform real-time signal transmission through the network, transmitting the power parameter signal of the first device and the voltage and frequency adjustment, and power distribution control signal; the second device 17 and the second wireless detection device 20 communicate wirelessly; the second device 17 and the networked platform 18 perform real-time signal transmission through the network, transmitting the power parameter signal of the second device and the voltage and frequency adjustment, and power distribution control signal.

[0039] Among them, the first device 16 includes a first speed controller 1-6, a first voltage controller 1-7, a first switch 1-8, a first transformer 1-9, a first synchronous controller 1-10, a second transformer 1-11, a first networked terminal module 1-12, a first wireless receiver 1-13, a second synchronous controller 1-14 and a first synchronous follower module 1-15.

[0040] The first wireless detection device 19 includes a third mutual inductor 1-4 and a first transmitter 1-5. The third mutual inductor 1-4 is connected to the first transmitter 1-5 via a connecting conductor and performs signal transmission. The third mutual inductor 1-4 includes a lead-out conductor, which is connected to the power grid 3.

[0041] The second device 17 includes a second speed controller 2-6, a second voltage controller 2-7, a second switch 2-8, a fourth mutual inductor 2-9, a third synchronous controller 2-10, a fifth mutual inductor 2-11, a second network terminal module 2-12, a second wireless receiver 2-13, a fourth synchronous controller 2-14 and a second synchronous follower module 2-15.

[0042] The second wireless detection device 20 includes a sixth mutual inductor 2-4 and a second transmitter 2-5. The sixth mutual inductor 2-4 is connected to the second transmitter 2-5 via a connecting conductor and performs signal transmission. The sixth mutual inductor 2-4 includes a lead-out conductor, which is connected to the power grid 3.

[0043] The first networked terminal module 1-12 and the networked platform 18 perform real-time signal transmission via the network. The second networked terminal module 2-12 and the networked platform 18 perform real-time signal transmission via the network.

[0044] The first speed regulating controller 1-6 is connected to the first voltage regulating controller 1-7, and is respectively connected to the first synchronous controller 1-10, the first networked terminal module 1-12, the first wireless receiver 1-13 and the second synchronous controller 1-14; the first synchronous controller 1-10 is respectively connected to the first switch 1-8, the first mutual inductor 1-9, the second mutual inductor 1-11, the first networked terminal module 1-12, the first wireless receiver 1-13 and the second synchronous controller 1-14; the first networked terminal module 1-12 is respectively connected to the first wireless receiver 1-13 and the second synchronous controller 1-14; the first wireless receiver 1-13 is connected to the second synchronous controller 1-14; the first synchronous follower module 1-15 is connected to the second synchronous controller 1-14.

[0045] The second speed controller 2-6 is connected to the second voltage regulating controller 2-7, and is respectively connected to the third synchronous controller 2-10, the second networked terminal module 2-12, the second wireless receiver 2-13 and the fourth synchronous controller 2-14; the third synchronous controller 2-10 is respectively connected to the second switch 2-8, the fourth mutual inductor 2-9, the fifth mutual inductor 2-11, the second networked terminal module 2-12, the second wireless receiver 2-13 and the fourth synchronous controller 2-14; the second networked terminal module 2-12 is respectively connected to the second wireless receiver 2-13 and the fourth synchronous controller 2-14; the second wireless receiver 2-13 is connected to the fourth synchronous controller 2-14; the second synchronous follower module 2-15 is connected to the fourth synchronous controller 2-14.

[0046] The first synchronous controller 1-10 is connected to the first speed controller 1-6, the first voltage controller 1-7, the first switch 1-8, the first mutual inductor 1-9, and the second mutual inductor 1-11 through connecting conductors. The second synchronous controller 1-14 is connected to the first synchronous follower module 1-15 and the first wireless receiver 1-13 through connecting conductors.

[0047] The third synchronous controller 2-10 is connected to the second speed controller 2-6, the second voltage controller 2-7, the second switch 2-8, the fourth mutual inductor 2-9, and the fifth mutual inductor 2-11 through connecting conductors. The fourth synchronous controller 2-14 is connected to the third synchronous follower module and the second wireless receiver 2-13 through connecting conductors.

[0048] The first wireless detection device 19 performs wireless communication with the first device 16 via the first transmitter 1 - 5 and the first wireless receiver 1 - 13 .

[0049] The second wireless detection device 20 communicates wirelessly with the second device 17 via the second transmitter 2 - 5 and the second wireless receiver 2 - 13 .

[0050] The wireless long-distance self-synchronous parallel-connected control method includes a wireless self-synchronous parallel-connected control method, a wireless self-synchronous parallel-connected control method and a wireless self-synchronous parallel-connected control method. The wireless self-synchronous parallel-connected control method is a combination of the wireless self-synchronous parallel-connected control method and the wireless self-synchronous parallel-connected control method.

[0051] like Figure 1As shown, in the wireless self-synchronous grid-connected control method, the first mutual inductor is connected to the grid load through a connecting conductor; the first wireless detection device is directly connected to the line and connected to the grid power supply; the first mutual inductor detects the mains signal to obtain the mains voltage and frequency, the second mutual inductor detects the electrical signal of the generator to obtain the unit voltage and frequency, the obtained voltage and frequency are transmitted to the first synchronous controller to perform quasi-synchronous control, the mains voltage is compared with the unit voltage, the mains frequency is compared with the unit frequency, the speed regulation and voltage regulation electrical signals are obtained, the first speed regulation controller and the first voltage regulation controller are respectively controlled to adjust the output voltage and frequency of the generator to make them consistent with the grid voltage and frequency, after the adjustment is completed, the first synchronous controller captures the phase angle, outputs the switch closing control electrical signal, and controls the first switch to perform grid-connected operation; the online switch is disconnected.

[0052] When power is restored, the third mutual inductor of the first wireless detection device is used to detect the voltage and frequency of the power grid, and the voltage and frequency signals are transmitted to the first device through the first transmitter; the first wireless receiver of the first device receives the signal and converts the signal into an electrical signal that can be recognized by the controller, and then transmits it to the second synchronous controller; the second synchronous controller obtains the electrical signal of the power generation device of the second mutual inductor from the first synchronous controller by communication, compares the difference between the signal and the electrical signal that can be recognized by the controller, outputs speed regulation and voltage regulation control signals, and controls the first speed regulation controller and the first voltage regulation controller to adjust the output voltage and frequency of the power generation device respectively; after the adjustment is completed, the second synchronous controller captures the phase angle, outputs the switch closing control electrical signal, and controls the first synchronous follower module to perform synchronous follow; at this time, the online switch is closed to achieve uninterrupted power supply for the entire process.

[0053] like Figure 2As shown, in the wireless self-synchronous parallel control method, the first device and the second device are respectively parallel-adaptively matched on the network platform through the first network terminal module and the second network terminal module; the first switch of the first device and the second switch of the second device are respectively connected to the grid load; the first device and the second device are started, the first switch is closed, and the second mutual inductor transmits the electrical signal of the first power generation device to the network platform through the network using the first synchronization controller and the first network terminal module, and the fifth mutual inductor transmits the electrical signal of the first power generation device to the network platform through the network using the third synchronization controller and the second network terminal module; the network platform outputs a control electrical signal by comparing the difference between the electrical signals of the two power generation devices; the control electrical signal is respectively transmitted through The first network terminal module and the second network terminal module are transmitted to the first synchronous controller and the third synchronous controller, and the signal is converted and output to control the first speed controller and the second speed controller to adjust the speed, the first voltage controller and the second voltage controller to adjust the voltage, and then adjust the voltage and frequency of the first device and the second device, so that the voltage and frequency of the first device and the second device are consistent; after the adjustment is completed, the phase angle is captured, and the network platform outputs the electrical signal of the control switch to control the closing of the second switch. After the closing is completed, the electrical signal of the control switch controls the first synchronous controller and the third synchronous controller to distribute the grid load, and the grid load distribution is automatically proportionally distributed according to the capacity of the first device and the second device. This control method is also applicable to the application scenario of multiple devices in parallel.

[0054] like Figure 3 As shown, in the wireless self-synchronous parallel and grid-connected control method, the first device and the second device are connected to the power grid, and the electrical signal for controlling load distribution output by the network connection platform controls the first synchronization controller and the third synchronization controller to distribute the power grid load and disconnect the online switch; when the power is restored, the voltage and frequency signals are transmitted through the first wireless detection device or the second wireless detection device, and the grid is connected through the second synchronization controller or the fourth synchronization controller, and the synchronization is followed by the first synchronization follower module or the second synchronization follower module, and the online switch is closed; the parallel and grid-connected operation is realized; this control method is also applicable to the application scenario of parallel and grid-connected multiple devices.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wireless long-distance self-synchronous parallel machine and grid control system, characterized in that: include: A first device (16), a first wireless detection device (19), a second device (17), a second wireless detection device (20) and a networked platform (18); The first device (16) and the first wireless detection device (19) transmit the power parameter signal of the power grid through wireless communication; the first device (16) and the network connection platform (18) perform real-time signal transmission through the network, transmitting the power parameter signal of the first device and the voltage frequency adjustment and power distribution control signal; the second device (17) and the second wireless detection device (20) communicate wirelessly; the second device (17) and the network connection platform (18) perform real-time signal transmission through the network, transmitting the power parameter signal of the second device and the voltage frequency adjustment and power distribution control signal.

2. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 1 is characterized in that: The first device (16) comprises a first speed control device (1-6), a first voltage control device (1-7), a first switch (1-8), a first mutual inductor (1-9), a first synchronous controller (1-10), a second mutual inductor (1-11), a first network terminal module (1-12), a first wireless receiver (1-13), a second synchronous controller (1-14) and a first synchronous follower module (1-15); The first networked terminal module (1-12) and the networked platform (18) perform real-time signal transmission via a network.

3. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 2 is characterized in that: The first wireless detection device (19) comprises a third mutual inductor (1-4) and a first transmitter (1-5); The third mutual inductor (1-4) is connected to the first transmitter (1-5) via a connecting conductor and performs signal transmission; the third mutual inductor (1-4) comprises a lead-out conductor, and the lead-out conductor is connected to a power grid (3); The first wireless detection device (19) performs wireless communication with the first device (16) via the first transmitter (1-5) and the first wireless receiver (1-13).

4. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 1 is characterized in that: The second device (17) comprises a second speed controller (2-6), a second voltage controller (2-7), a second switch (2-8), a fourth mutual inductor (2-9), a third synchronous controller (2-10), a fifth mutual inductor (2-11), a second network terminal module (2-12), a second wireless receiver (2-13), a fourth synchronous controller (2-14) and a second synchronous follower module (2-15); The second networked terminal module (2-12) and the networked platform (18) perform real-time signal transmission via the network.

5. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 4 is characterized in that: The second wireless detection device (20) comprises a sixth mutual inductor (2-4) and a second transmitter (2-5); The sixth mutual inductor (2-4) is connected to the second transmitter (2-5) via a connecting conductor and performs signal transmission; the sixth mutual inductor (2-4) comprises a lead-out conductor, and the lead-out conductor is connected to a power grid (3); The second wireless detection device (20) communicates wirelessly with the second device (17) via the second transmitter (2-5) and the second wireless receiver (2-13).

6. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 2 is characterized in that: The first speed regulating controller (1-6) is connected to the first voltage regulating controller (1-7), and is respectively connected to the first synchronous controller (1-10), the first network terminal module (1-12), the first wireless receiver (1-13) and the second synchronous controller (1-14); the first synchronous controller (1-10) is respectively connected to the first switch (1-8), the first mutual inductor (1-9), the second mutual inductor (1-11), the first network terminal module (1-12), the first wireless receiver (1-13) and the second synchronous controller (1-14); the first network terminal module (1-12) is respectively connected to the first wireless receiver (1-13) and the second synchronous controller (1-14); the first wireless receiver (1-13) is connected to the second synchronous controller (1-14); and the first synchronous follower module (1-15) is connected to the second synchronous controller (1-14).

7. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 4 is characterized in that: The second speed regulating controller (2-6) is connected to the second voltage regulating controller (2-7), and is respectively connected to the third synchronous controller (2-10), the second network terminal module (2-12), the second wireless receiver (2-13) and the fourth synchronous controller (2-14); the third synchronous controller (2-10) is respectively connected to the second switch (2-8), the fourth mutual inductor (2-9), the fifth mutual inductor (2-11), the second network terminal module (2-12), the second wireless receiver (2-13) and the fourth synchronous controller (2-14); the second network terminal module (2-12) is respectively connected to the second wireless receiver (2-13) and the fourth synchronous controller (2-14); the second wireless receiver (2-13) is connected to the fourth synchronous controller (2-14); and the second synchronous follower module (2-15) is connected to the fourth synchronous controller (2-14).

8. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 2 is characterized in that: The first synchronous controller (1-10) is respectively connected to the first speed regulating controller (1-6), the first voltage regulating controller (1-7), the first switch (1-8), the first mutual inductor (1-9), and the second mutual inductor (1-11) through connecting conductors; The second synchronous controller (1-14) is respectively connected to the first synchronous follower module (1-15) and the first wireless receiver (1-13) through connecting conductors.

9. The wireless long-distance self-synchronization parallel machine and grid control system according to claim 4 is characterized in that: The third synchronous controller (2-10) is respectively connected to the second speed regulating controller (2-6), the second voltage regulating controller (2-7), the second switch (2-8), the fourth mutual inductor (2-9), and the fifth mutual inductor (2-11) through connecting conductors; The fourth synchronous controller (2-14) is connected to the third synchronous follower module and the second wireless receiver (2-13) respectively through connecting conductors.

10. The control method applied to the wireless long-distance self-synchronous parallel machine and grid-connected control system according to claim 1, characterized in that: Includes three modes: Wireless self-synchronous grid-connected control mode, wireless self-synchronous parallel control mode and wireless self-synchronous parallel grid-connected control mode; wherein the wireless self-synchronous parallel grid-connected control mode is a combination of the wireless self-synchronous grid-connected control mode and the wireless self-synchronous parallel control mode; In the wireless self-synchronous grid-connected control mode, the first mutual inductor is connected to the grid load through a connecting conductor; the first wireless detection device is connected to the grid power supply by being hung on the line; the first mutual inductor detects the mains signal to obtain the mains voltage and frequency, the second mutual inductor detects the electrical signal of the generator to obtain the unit voltage and frequency, the obtained voltage and frequency are transmitted to the first synchronous controller for quasi-synchronous control, the mains voltage is compared with the unit voltage, the mains frequency is compared with the unit frequency, the speed regulation and voltage regulation electrical signals are obtained, and the first speed regulation controller and the first voltage regulation controller are respectively controlled to adjust the output voltage and frequency of the generator to keep them consistent with the voltage and frequency of the grid; the first synchronous controller captures the phase angle, outputs the switch closing control electrical signal, and controls the first switch to perform grid-connected operation; at this time, the online switch is disconnected; When power is restored, the voltage and frequency of the power grid are detected by the third mutual inductor, and the voltage and frequency signals are transmitted to the first wireless receiver through the first transmitter; the first wireless receiver receives the signal and converts the signal into an electrical signal recognized by the controller, and then transmits it to the second synchronous controller; the second synchronous controller obtains the electrical signal of the power generation device of the second mutual inductor from the first synchronous controller by means of communication, compares the difference between the signal and the electrical signal recognized by the controller, outputs the speed regulation and voltage regulation control signals, and respectively controls the first speed regulation controller and the first voltage regulation controller to adjust the output voltage and frequency of the power generation device; the second synchronous controller captures the phase angle, outputs the switch closing control electrical signal, and controls the first synchronous follower module to perform synchronous following; at this time, the online switch is closed; In the wireless self-synchronous parallel control mode, the first device and the second device are adaptively matched in parallel on the network platform through the first network terminal module and the second network terminal module respectively; the first switch of the first device and the second switch of the second device are connected to the grid load respectively; the first device and the second device are started, the first switch is closed, and the second mutual inductor transmits the electrical signal of the first power generation device to the network platform through the network using the first synchronous controller and the first network terminal module, and the fifth mutual inductor transmits the electrical signal of the second power generation device to the network platform through the network using the third synchronous controller and the second network terminal module; the network platform outputs a control electrical signal by comparing the difference between the electrical signals of the two power generation devices; the control electrical signal is transmitted to the network platform through the network. The signal is transmitted to the first synchronous controller and the third synchronous controller through the first network terminal module and the second network terminal module, and the signal is converted and output to control the first speed regulating controller and the second speed regulating controller to adjust the speed, the first voltage regulating controller and the second voltage regulating controller to adjust the voltage, and then adjust the voltage and frequency of the first device and the second device so that the voltage and frequency of the first device and the second device are consistent; the phase angle is captured, and the network platform outputs an electrical signal to control the switch to control the closing of the second switch. After the closing is completed, the electrical signal of the control switch controls the first synchronous controller and the third synchronous controller to distribute the grid load, and the grid load distribution is automatically proportionally distributed according to the capacity of the first device and the second device; In the wireless self-synchronous parallel-connection and grid-connection control mode, the first device and the second device are connected to the grid, and the electrical signal for controlling load distribution output by the network connection platform controls the first synchronous controller and the third synchronous controller to distribute the grid load and disconnect the online switch; when the power is restored, the voltage and frequency signal are transmitted through the first wireless detection device or the second wireless detection device, and the grid is connected through the second synchronous controller or the fourth synchronous controller, and the synchronization is followed by the first synchronous follower module or the second synchronous follower module, and the online switch is closed; Realize parallel operation.

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