Generator set wireless synchronization grid-connected system and method based on edge computing

Abstract

The application relates to a wireless synchronization and grid connection system and method of a generator set based on edge computing, and relates to the technical field of grid connection control of a power system. Phase difference calculation and closing decision are completed locally at a power supply side operation and maintenance terminal, an extremely fast control closed loop is constructed, the influence of wireless communication delay on closing precision is avoided, a "difference direct transmission" mode is adopted, only light adjustment instructions are transmitted, the requirement for communication bandwidth is reduced, the system anti-interference performance and reliability are improved, a multi-mode grid connection mechanism is introduced, different modes can be flexibly switched according to on-site equipment conditions, the system has high efficiency, safety and wide adaptability, and the problems of high operation risk of a traditional wired scheme and large delay and poor precision of an existing wireless waveform transmission scheme are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power system grid-connected control, in particular to a wireless synchronization grid-connected system and method for generator sets based on edge computing. BACKGROUND

[0002] In the non-power-off operation of a low-voltage distribution network, in order to realize the grid connection of a generator set and a power supply, it is necessary to ensure that the voltage, frequency and phase of the two sides are synchronized. The traditional method relies on laying two large-section quick cables to be connected to the power supply side and the load side of the total incoming line switch of a transformer area, so as to obtain the electrical parameters of the two sides and realize control. However, this method has the problems of complicated operation, heavy and easy-to-damage cable, insulation breakage and risk of electric shock. In addition, the space on the power supply side of many old transformer areas is small, and it is not possible to safely and reliably install a quick interface or a bus clamp, which makes it difficult to implement or extremely risky to implement the traditional wired grid connection scheme. At present, the closest alternative scheme on the market is a waveform transmission type synchronization system based on wireless communication. This scheme transmits the voltage waveform sampling data of the power supply side to the generator set controller in real time through a wireless network (such as 4G / 5G or LoRa), and the controller reconstructs the waveform and makes a synchronization judgment. However, this scheme has the following defects: data transmission delay and uncertainty: the high bandwidth and stability requirements of a large amount of waveform data on the wireless network, communication delay leading to phase deviation; delay of closing instruction leading to missed opportunity: the closing instruction needs to be transmitted back through the wireless network, and the delay is uncontrollable, which is easy to miss the best closing window; complex system and low reliability: a large amount of calculation is introduced in the process of waveform restoration and data alignment, which makes the system complex and prone to errors. Therefore, it is necessary to provide a wireless synchronization grid-connected system and method with low delay, high reliability and high precision. SUMMARY

[0003] Therefore, it is necessary to provide a wireless synchronization grid-connected system and method with low delay, high reliability and high precision.

[0004] In a first aspect, a wireless synchronization grid-connected method for generator sets based on edge computing is provided, which comprises the following steps:

[0005] obtaining a first target parameter, wherein the first target parameter comprises a first voltage and a first frequency signal of the power supply collected based on the power supply side;

[0006] obtaining a second target parameter, wherein the first target parameter comprises a second voltage and a second frequency signal of the generator collected based on the generator set side;

[0007] processing the first target parameter and the second target parameter based on the operation and maintenance terminal of the power supply side to determine a target difference parameter of the power supply side and the generator set side, wherein the target difference parameter comprises a phase difference, a voltage difference and a frequency difference.

[0008] Based on the micro-power wireless communication network, the target difference parameter obtained by the operation and maintenance terminal on the side of the power grid is sent to the intelligent controller on the side of the generator set;

[0009] Based on the received target difference parameter, the speed governor and pressure regulator on the side of the generator set are adjusted through a closed-loop control mechanism, and at the same time, the phase difference is monitored based on the operation and maintenance terminal on the side of the power grid;

[0010] When the phase difference meets the preset closing condition, a closing control operation is performed.

[0011] Optionally, obtaining the first target parameter comprises:

[0012] Based on the voltage transformer, the AC voltage signal on the side of the power grid is collected, and the AC voltage signal is converted into a first low-voltage isolated analog signal;

[0013] The first low-voltage isolated analog signal is sampled and processed by an analog-to-digital converter to obtain a first target digital signal sequence;

[0014] Based on the first target digital signal sequence, the first frequency on the side of the power grid is determined through a zero-crossing detection mechanism, and the first voltage effective value on the side of the power grid is determined through a root mean square calculation mechanism;

[0015] The first frequency and the first voltage effective value are defined as the first target parameter.

[0016] Optionally, obtaining the second target parameter comprises:

[0017] The generator output voltage signal on the side of the generator set is collected, and the generator output voltage signal is converted into a second low-voltage isolated analog signal;

[0018] The second low-voltage isolated analog signal is sampled and processed by an analog-to-digital converter to obtain a second target digital signal sequence;

[0019] Based on the second target digital signal sequence, the second frequency on the side of the generator set is determined through a zero-crossing detection mechanism, and the second voltage effective value on the side of the generator set is determined through a root mean square calculation mechanism;

[0020] The second voltage effective value and the second frequency are encapsulated into a data packet, and sent to the operation and maintenance terminal on the side of the power grid through a wireless communication network;

[0021] In response to receiving the data packet, the operation and maintenance terminal on the side of the power grid analyzes the data packet to obtain the analyzed second voltage effective value and the second frequency;

[0022] The second voltage effective value and the second frequency after analysis are defined as the second target parameter.

[0023] Optionally, based on the operation and maintenance terminal of the power side, the first target parameter and the second target parameter are processed to determine the target difference parameter of the power side and the generator set side, including:

[0024] Based on the first target parameter and the second target parameter, difference operation is performed.

[0025] The difference operation includes: calculating a first difference of the first voltage effective value and the second voltage effective value, calculating a second difference of the first frequency and the second frequency, and calculating a phase difference based on the waveform signals of the first voltage effective value and the second voltage effective value.

[0026] The first difference is defined as the voltage difference, and the second difference is defined as the frequency difference.

[0027] Based on the phase difference, the frequency difference and the voltage difference, the target difference parameter is constructed.

[0028] Optionally, before the target difference parameter obtained based on the operation and maintenance terminal of the power side is sent to the intelligent controller of the generator set side based on the micro-power wireless communication network, the method includes:

[0029] Obtain real-time evaluation parameters, determine a first evaluation score based on the real-time evaluation parameters and a comprehensive evaluation model, and the comprehensive evaluation model is determined based on historical evaluation parameters training, and the comprehensive evaluation model includes:

[0030]

[0031] Among them, represents a comprehensive evaluation value, and respectively represent the phase error caused by delay, the phase error caused by asynchronous sampling, the phase error caused by harmonic distortion, the phase error caused by noise interference and the system fixed phase deviation, represents the system frequency, represents the total delay time, represents the maximum time deviation of the sampling time of the two-way voltage signal.

[0032] Based on the first mapping relationship between the comprehensive evaluation value and the evaluation score, the first evaluation score corresponding to the comprehensive evaluation value is determined.

[0033] Determine fixed error terms and random error terms, and based on the fixed error terms and random error terms, determine a first error reference value. At the same time, obtain second error reference values ​​corresponding to historical fixed error terms and historical random error terms.

[0034] The second evaluation score is determined based on the first error reference value and the second error reference value;

[0035] Based on the first evaluation score and the second evaluation score, the deviation adjustment parameter is determined;

[0036] Based on the deviation adjustment parameters, the target difference parameter is adjusted, and the adjusted target difference parameter is sent to the intelligent controller on the generator set side.

[0037] Optionally, a fixed error term and a random error term are determined; based on the fixed error term and the random error term, a first error reference value is determined; simultaneously, a second error reference value corresponding to historical fixed error terms and historical random error terms is obtained; and based on the first error reference value and the second error reference value, a second evaluation score is determined, including:

[0038] Based on the error reference value calculation function, the first error reference value and the second error reference value are calculated and determined respectively, wherein the error reference value calculation function includes:

[0039]

[0040] in, Indicates the error reference value. Indicates a fixed error term. Represents the random error term. Indicates the confidence factor;

[0041] The first error reference value and the second error reference value are defined as the y coordinate and z coordinate in the three-dimensional coordinate system, respectively, and the time nodes corresponding to the first error reference value and the second error reference value are defined as the x coordinate, wherein the time nodes corresponding to the first error reference value and the second error reference value are the same;

[0042] The second evaluation score is determined based on a scoring function, which includes:

[0043]

[0044] in, Indicates the evaluation value. These represent the current time node. The second error reference value and the first error reference value, Representing time nodes The second error reference value and the first error reference value, respectively represent a second error reference value and a first error reference value of a time node

[0045] determine a second evaluation score corresponding to the evaluation value based on a second mapping relationship between the evaluation value and the evaluation score.

[0046] Optionally, determining the deviation adjustment parameter based on the first evaluation score and the second evaluation score comprises:

[0047] determining an absolute value of a difference between the first evaluation score and the second evaluation score;

[0048] in response to the absolute value of the difference being greater than or equal to a preset threshold, determining the deviation adjustment parameter corresponding to the absolute value of the difference based on a mapping relationship between the absolute value of the difference and the deviation adjustment parameter.

[0049] Optionally, adjusting the speed governor and the voltage regulator on the generator set side based on the received target difference parameter through a closed-loop control mechanism comprises:

[0050] receiving the target difference parameter, the target difference parameter at least including a voltage difference and a frequency difference;

[0051] inputting the voltage difference and the frequency difference into a closed-loop control loop, the closed-loop control loop including a voltage control loop and a frequency control loop, comprising:

[0052] inputting the voltage difference into the voltage control loop to generate a first control signal to adjust the output voltage of the generator;

[0053] inputting the frequency difference into the frequency control loop to generate a second control signal to adjust the speed of the engine and the output frequency of the generator;

[0054] outputting the first control signal to the voltage regulator and the second control signal to the speed governor to drive the generator set to perform output adjustment operation.

[0055] Optionally, performing the closing control operation in response to the phase difference meeting a preset closing condition comprises:

[0056] monitoring a real-time phase difference and comparing the real-time phase difference with the preset closing condition;

[0057] ​In response to the real-time phase difference meeting the preset closing condition, a closing control operation is triggered and performed, wherein the closing control operation comprises: in a wireless automatic synchronization mode, the operation and maintenance terminal sends a closing instruction to an electric operating mechanism of the power side circuit breaker; in a wireless manual visual synchronization mode, the operation and maintenance terminal provides a closing prompt information to an operator, and the circuit breaker is closed manually based on the prompt information.

[0058] In a second aspect, an edge computing-based wireless synchronization and grid-connection system for a generator set is provided, and the system comprises:

[0059] A first acquisition module is configured to acquire a first target parameter, wherein the first target parameter comprises a first voltage and a first frequency signal of a power grid collected on a power side;

[0060] A second acquisition module is configured to acquire a second target parameter, wherein the first target parameter comprises a second voltage and a second frequency signal of a generator collected on a generator set side;

[0061] A processing module is configured to process the first target parameter and the second target parameter based on an operation and maintenance terminal on the power side, to determine a target difference parameter of the power side and the generator set side, wherein the target difference parameter comprises a phase difference, a voltage difference and a frequency difference;

[0062] A transmission module is configured to send the target difference parameter obtained based on the operation and maintenance terminal on the power side to an intelligent controller on the generator set side based on a micro-power wireless communication network;

[0063] An adjustment module is configured to adjust a speed regulator and a voltage regulator on the generator set side based on the received target difference parameter through a closed-loop control mechanism, and simultaneously monitor the phase difference based on the operation and maintenance terminal on the power side;

[0064] An execution module is configured to perform a closing control operation in response to the phase difference meeting a preset closing condition.

[0065] In a third aspect, a computer device is provided, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the following steps when executing the computer program:

[0066] A first target parameter is acquired, wherein the first target parameter comprises a first voltage and a first frequency signal of a power grid collected on a power side;

[0067] A second target parameter is acquired, wherein the first target parameter comprises a second voltage and a second frequency signal of a generator collected on a generator set side;

[0068] determining a target difference parameter of the power grid side and the generator set side based on the first target parameter and the second target parameter, the target difference parameter including a phase difference, a voltage difference and a frequency difference;

[0069] sending the target difference parameter obtained by the operation and maintenance terminal of the power grid side to the intelligent controller of the generator set side based on a micro-power wireless communication network;

[0070] adjusting the speed governor and the voltage regulator of the generator set side based on the received target difference parameter through a closed-loop control mechanism, and simultaneously monitoring the phase difference based on the operation and maintenance terminal of the power grid side;

[0071] performing a closing control operation in response to the phase difference meeting a preset closing condition.

[0072] In a fourth aspect, a computer readable storage medium is provided, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to implement the following steps:

[0073] obtaining a first target parameter, the first target parameter including a first voltage and a first frequency signal of a power grid collected based on a power grid side;

[0074] obtaining a second target parameter, the first target parameter including a second voltage and a second frequency signal of a generator collected based on a generator set side;

[0075] determining a target difference parameter of the power grid side and the generator set side based on the first target parameter and the second target parameter, the target difference parameter including a phase difference, a voltage difference and a frequency difference;

[0076] sending the target difference parameter obtained by the operation and maintenance terminal of the power grid side to the intelligent controller of the generator set side based on a micro-power wireless communication network;

[0077] adjusting the speed governor and the voltage regulator of the generator set side based on the received target difference parameter through a closed-loop control mechanism, and simultaneously monitoring the phase difference based on the operation and maintenance terminal of the power grid side;

[0078] performing a closing control operation in response to the phase difference meeting a preset closing condition.

[0079] In a fifth aspect, a computer program product is provided, and the computer program product includes a computer program, and the computer program is executed by a processor to implement the following steps:

[0080] obtaining a first target parameter, the first target parameter including a first voltage and a first frequency signal of a power grid collected based on a power grid side;

[0081] obtaining a second target parameter, the first target parameter comprising a second voltage and a second frequency signal of the generator collected based on the generator set side;

[0082] processing the first target parameter and the second target parameter based on the operation and maintenance terminal of the power side to determine a target difference parameter of the power side and the generator set side, the target difference parameter comprising a phase difference, a voltage difference and a frequency difference;

[0083] based on the micro-power wireless communication network, transmitting the target difference parameter obtained based on the operation and maintenance terminal of the power side to the intelligent controller of the generator set side;

[0084] based on the received target difference parameter, adjusting the speed governor and the pressure regulator of the generator set side through a closed-loop control mechanism, and simultaneously monitoring the phase difference based on the operation and maintenance terminal of the power side;

[0085] in response to the phase difference meeting a preset closing condition, performing a closing control operation.

[0086] The above-mentioned edge computing-based generator set wireless synchronization grid connection system and method, the method comprising: obtaining a first target parameter, the first target parameter comprising a first voltage and a first frequency signal of the power collected based on the power side; obtaining a second target parameter, the first target parameter comprising a second voltage and a second frequency signal of the generator collected based on the generator set side; processing the first target parameter and the second target parameter based on the operation and maintenance terminal of the power side to determine a target difference parameter of the power side and the generator set side, the target difference parameter comprising a phase difference, a voltage difference and a frequency difference; based on the micro-power wireless communication network, transmitting the target difference parameter obtained based on the operation and maintenance terminal of the power side to the intelligent controller of the generator set side; based on the received target difference parameter, adjusting the speed governor and the pressure regulator of the generator set side through a closed-loop control mechanism, and simultaneously monitoring the phase difference based on the operation and maintenance terminal of the power side; in response to the phase difference meeting a preset closing condition, performing a closing control operation. The application completes phase difference calculation and closing decision locally on the power side operation and maintenance terminal, constructs an ultra-fast control closed loop, avoids the influence of wireless communication delay on closing accuracy, adopts a "difference direct transmission" mode, only transmits lightweight adjustment instructions, reduces the requirement for communication bandwidth, improves system anti-interference and reliability, introduces a multi-modal grid connection mechanism, can flexibly switch between different modes according to on-site device conditions, has high efficiency, safety and wide adaptability, and effectively solves the problems of high operation risk of traditional wired schemes and large delay and poor accuracy of existing wireless waveform transmission schemes. BRIEF DESCRIPTION OF DRAWINGS

[0087] Figure 1 An application environment diagram of the wireless synchronization grid-connected method of the generator set based on edge computing in an embodiment;

[0088] Figure 2 A flowchart of the wireless synchronization grid-connected method of the generator set based on edge computing in an embodiment;

[0089] Figure 3 A structural block diagram of the wireless synchronization grid-connected system of the generator set based on edge computing in an embodiment;

[0090] Figure 4 An internal structural diagram of the computer device in an embodiment. DETAILED DESCRIPTION

[0091] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0092] It should be understood that, in the description of the present application, unless the context clearly requires otherwise, the terms "comprise", "comprise", and the like in the entire specification should be interpreted as inclusive meaning rather than exclusive or exhaustive meaning; that is, the meaning of "including but not limited to".

[0093] It should also be understood that the terms "first", "second", and the like are only for the purpose of description, and should not be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0094] It should be noted that the terms "S1", "S2", and the like are only for the purpose of describing the steps, and do not specifically refer to the order or position, nor limit the present application. It is only for the convenience of describing the method of the present application, and should not be understood as indicating the order of the steps. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of those of ordinary skill in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0095] The wireless synchronization grid-connected method of the generator set based on edge computing provided by the present application can be applied to, for example Figure 1In the application environment shown, terminal 102 communicates with a data processing platform set on server 104 via a network. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, and portable wearable devices. Server 104 can be implemented as a standalone server or a server cluster consisting of multiple servers.

[0096] In one embodiment, such as Figure 2 As shown, a method for wireless synchronization and grid connection of generator sets based on edge computing is provided, which is applied to... Figure 1 Taking the terminal in the example, the explanation includes the following steps:

[0097] S1: Obtain the first target parameter, which includes the first voltage and first frequency signal of the mains power collected from the mains power side.

[0098] It should be noted that the mains power side refers to the power supply side from the public power grid, specifically the power input terminal of the main incoming switch of the transformer substation. It represents the voltage, frequency, and phase reference of the power grid system and is the target reference source for generator sets to synchronize. During grid connection operations, all parameters must be compared and adjusted with the mains power side as the reference. The first frequency signal refers to the real-time frequency value of the AC voltage of the mains power, which is directly collected and calculated by the operation and maintenance terminal located on the mains power side through its local voltage transformer and signal processing circuit.

[0099] S2: Obtain the second target parameters, the first target parameters including the second voltage and second frequency signals of the generator collected from the generator set side.

[0100] It should be noted that the generator set side refers to the distributed generation equipment to be connected to the grid and its control system, including the generator, intelligent controller and related measurement units. It is responsible for collecting its own output voltage and frequency, receiving adjustment commands from the operation and maintenance terminal, and driving the speed regulation and voltage regulation mechanism to make its output parameters approach the grid reference. The second frequency signal is the real-time frequency value of the generator output voltage, which is locally collected and calculated by the intelligent controller on the generator set side.

[0101] S3: Based on the maintenance terminal on the mains side, process the first target parameter and the second target parameter to determine the target difference parameter between the mains side and the generator set side. The target difference parameter includes phase difference, voltage difference and frequency difference.

[0102] It should be noted that the maintenance terminal on the mains side is a portable intelligent control device installed on the incoming side of the power grid. It is responsible for collecting the mains voltage and frequency, receiving the generator side parameters, and locally calculating the phase difference, voltage difference and frequency difference between the two sides. Based on this, it makes a decision to close the circuit or issues an adjustment command. It is the core edge computing unit for achieving precise wireless synchronization.

[0103] S4: Based on the micro-power wireless communication network, the target difference parameter obtained by the operation and maintenance terminal on the power side is sent to the intelligent controller on the generator set side.

[0104] It should be noted that the micro-power wireless communication network is a low-power, low-data-rate wireless data transmission system, typical representatives include LoRa, Zigbee, etc. In the grid-connected system, it is responsible for establishing a stable and reliable wireless link between the operation and maintenance terminal on the power side and the intelligent controller on the generator set side, and is specially used to transmit lightweight difference instructions and state information, replacing heavy cables. The intelligent controller is the core processing unit installed on the generator set side, responsible for collecting the output voltage and frequency of the generator, receiving the difference parameter from the operation and maintenance terminal, and driving the governor and voltage regulator through the closed-loop algorithm to accurately adjust the unit output, so that the electrical parameters dynamically track the power reference.

[0105] S5: Based on the received target difference parameter, the governor and voltage regulator on the generator set side are adjusted through the closed-loop control mechanism, and the phase difference is monitored based on the operation and maintenance terminal on the power side.

[0106] It should be noted that the closed-loop control mechanism is an automatic adjustment principle based on real-time feedback. The system continuously monitors the output results (such as generator frequency) and compares them with the target value (such as power frequency) to obtain the error (frequency difference). The controller adjusts the actuator (such as the governor) in real time based on the error, forming a "monitoring-comparison-adjustment" cycle until the error is eliminated. The governor is a control component of the prime mover (such as a diesel engine) of the generator, which adjusts the fuel or air intake to change the engine speed and thus control the generator output frequency. The voltage regulator is a control component of the generator excitation system, which adjusts the excitation current to change the generator terminal voltage and thus stabilize the output voltage at the set value. Both of them realize accurate control of the generator power output.

[0107] S6: In response to the phase difference meeting the preset closing condition, a closing control operation is performed.

[0108] It should be noted that the preset closing condition is an accurate phase threshold for the operation and maintenance terminal to determine whether to issue a closing instruction. It is usually set to trigger when the phase difference enters a small negative interval (such as -8° to -5°) and approaches 0°. This preset value has already compensated for the mechanical action time of the circuit breaker, ensuring that the main contact is closed at the moment when the phase difference is 0°. The closing control operation is the final execution action of the operation and maintenance terminal to drive or instruct the circuit breaker to close. In automatic mode, the terminal directly sends a closing pulse to the circuit breaker electric operating mechanism. In manual mode, it sends a clear closing prompt to the operator for manual execution, thereby completing the grid connection of the generator set and the power.

[0109] In some embodiments, obtaining the first target parameter comprises:

[0110] Based on the voltage transformer, the AC voltage signal of the power side is collected, and the AC voltage signal is converted into a first low-voltage isolated analog signal;

[0111] The first low-voltage isolated analog signal is sampled and processed by an analog-to-digital converter to obtain a first target digital signal sequence;

[0112] Based on the first target digital signal sequence, the first frequency of the power side is determined through a zero-crossing detection mechanism, and the first voltage effective value of the power side is determined through a root mean square calculation mechanism;

[0113] The first frequency and the first voltage effective value are defined as the first target parameter.

[0114] In some embodiments, obtaining the second target parameter comprises:

[0115] The generator output voltage signal of the generator set side is collected, and the generator output voltage signal is converted into a second low-voltage isolated analog signal;

[0116] The second low-voltage isolated analog signal is sampled and processed by an analog-to-digital converter to obtain a second target digital signal sequence;

[0117] Based on the second target digital signal sequence, the second frequency of the generator set side is determined through a zero-crossing detection mechanism, and the second voltage effective value of the generator set side is determined through a root mean square calculation mechanism;

[0118] The second voltage effective value and the second frequency are encapsulated into a data packet and sent to the operation and maintenance terminal of the power side through a wireless communication network;

[0119] In response to receiving the data packet, the operation and maintenance terminal of the power side analyzes the data packet to obtain the analyzed second voltage effective value and the second frequency;

[0120] The analyzed second voltage effective value and the second frequency are defined as the second target parameter.

[0121] In some embodiments, based on the operation and maintenance terminal of the power side, the first target parameter and the second target parameter are processed to determine the target difference parameter of the power side and the generator set side, comprising:

[0122] Based on the first target parameter and the second target parameter, difference operation is performed;

[0123] The difference operation includes: calculating a first difference value determined by the first voltage effective value and the second voltage effective value, calculating a second difference value determined by the first frequency and the second frequency, and calculating a phase difference based on waveform signals of the first voltage effective value and the second voltage effective value, wherein the above difference values are all the difference between the power side parameter and the generator side parameter, and the phase difference is calculated by the terminal using the power and generator voltage waveform data (or the zero-crossing time stamp) it holds at the same time, through the zero-crossing detection method, to calculate the time difference of the zero-crossing points of the two voltage waveforms In combination with the period T, the real-time phase difference is calculated by the formula: phase difference = (Δt / T)*360°.

[0124] The first difference value is defined as the voltage difference, and the second difference value is defined as the frequency difference.

[0125] Based on the phase difference, the frequency difference and the voltage difference, the target difference parameter is constructed.

[0126] In some embodiments, before sending the target difference parameter obtained by the power side operation and maintenance terminal to the intelligent controller of the generator side based on the micro-power wireless communication network, the method includes:

[0127] Obtaining real-time evaluation parameters, determining a first evaluation score based on the real-time evaluation parameters and a comprehensive evaluation model, wherein the comprehensive evaluation model is determined based on historical evaluation parameters, and the comprehensive evaluation model includes:

[0128]

[0129] wherein, represents the comprehensive evaluation value, and respectively represent the phase error caused by delay, the phase error caused by asynchronous sampling, the phase error caused by harmonic distortion, the phase error caused by noise interference and the system fixed phase deviation, represents the system frequency, represents the total delay time, The maximum time deviation of two voltage signal sampling moments is represented, wherein the phase error caused by delay refers to the error caused by the "outdated" phase measurement value due to the time-consuming process of data processing, transmission, etc. between the signal is sampled and the phase difference result is calculated, the phase error caused by sampling asynchronization refers to the small time deviation of the sampling time of the power supply voltage and the generator voltage signal by the operation and maintenance terminal, which directly converts into a fixed phase error, the phase error caused by harmonic distortion refers to the error caused by the shift of the "zero-crossing point" found based on the zero-crossing detection method due to the high-order harmonics (such as 3rd, 5th harmonics) contained in the power grid and the generator output voltage waveform which distort the shape of the waveform, the phase error caused by noise interference refers to the random electromagnetic interference superimposed on the voltage signal, which makes the voltage value of the signal near the zero-crossing point jump randomly, resulting in unstable zero-crossing time determined by each zero-crossing detection, thereby generating random fluctuation error, and the system fixed phase deviation refers to a fixed, time-varying phase deviation introduced by the inherent characteristics of the hardware circuit itself (such as the angle difference of the voltage transformer, the phase shift of the operational amplifier, the filter group delay, etc.);

[0130] Based on the first mapping relationship between the comprehensive evaluation value and the evaluation score, a first evaluation score corresponding to the comprehensive evaluation value is determined, wherein the mapping relationship is set by experts and saved in the database, and can be directly called;

[0131] A fixed error term and a random error term are determined, and based on the fixed error term and the random error term, a first error reference value is determined, and at the same time, a second error reference value corresponding to a historical fixed error term and a historical random error term is obtained, wherein the fixed error term can include system zero deviation, sensor angle difference and fixed calculation delay, etc., and the random error term can include noise interference error, harmonic fluctuation error and quantization error, etc.

[0132] Based on the first error reference value and the second error reference value, a second evaluation score is determined;

[0133] Based on the first evaluation score and the second evaluation score, a deviation adjustment parameter is determined;

[0134] Based on the deviation adjustment parameter, the target difference value parameter is adjusted, and the adjusted target difference value parameter is sent to the intelligent controller on the generator set side.

[0135] In some specific embodiments, the fixed error term and the random error term are determined, the first error reference value is determined based on the fixed error term and the random error term, and at the same time, the second error reference value corresponding to the historical fixed error term and the historical random error term is obtained, and the second evaluation score is determined based on the first error reference value and the second error reference value.

[0136] Based on the error reference value calculation function, the first error reference value and the second error reference value are calculated and determined respectively, wherein the error reference value calculation function includes:

[0137]

[0138] in, Indicates the error reference value. Indicates a fixed error term. Represents the random error term. Indicates the confidence factor;

[0139] The first error reference value and the second error reference value are defined as the y-coordinate and z-coordinate in a three-dimensional coordinate system, respectively. The time nodes corresponding to the first error reference value and the second error reference value are defined as the x-coordinate. The time nodes corresponding to the first error reference value and the second error reference value are the same. The same time node means the same time node in different time periods, such as the time node being 3 o'clock in a one-day period. The three-dimensional coordinate system includes (x, y, z) coordinates. The time node is defined as the x-coordinate, and the first error reference value and the second error reference value are defined as the y-coordinate and z-coordinate in a three-dimensional coordinate system, respectively. Based on this, coordinate nodes in the three-dimensional coordinate system can be generated.

[0140] The second evaluation score is determined based on a scoring function, which includes:

[0141]

[0142] in, Indicates the evaluation value. These represent the current time node. The second error reference value and the first error reference value, Representing time nodes The second error reference value and the first error reference value, Representing time nodes The second error reference value and the first error reference value;

[0143] Based on the second mapping relationship between the evaluation value and the evaluation score, the second evaluation score corresponding to the evaluation value is determined. This mapping relationship is preset by expert scoring and stored in the database, and can be directly accessed.

[0144] In some specific implementations, determining the deviation adjustment parameter based on the first evaluation score and the second evaluation score includes:

[0145] Determine the absolute value of the difference between the first evaluation score and the second evaluation score;

[0146] In response to the absolute value of the difference being greater than or equal to a preset threshold, a deviation adjustment parameter corresponding to the absolute value of the difference is determined based on a mapping relationship between the absolute value of the difference and the deviation adjustment parameter, wherein the mapping relationship is set by a preset expert score and saved in a database and can be directly called, and the preset threshold can be set according to actual needs. The voltage difference and the frequency difference are adjusted according to the deviation adjustment parameter.

[0147] In some embodiments, based on the received target difference parameter, the speed governor and the voltage regulator on the generator set side are adjusted through a closed-loop control mechanism, including:

[0148] The target difference parameter is received, and the target difference parameter includes at least a voltage difference and a frequency difference;

[0149] The voltage difference and the frequency difference are input into a closed-loop control loop, and the closed-loop control loop includes a voltage control loop and a frequency control loop, including:

[0150] The voltage difference is input into the voltage control loop to generate a first control signal to adjust the output voltage of the generator, that is, the voltage difference is input into the voltage control loop, and a first control signal for driving the voltage regulator is calculated by the control algorithm of the loop to adjust the output voltage of the generator;

[0151] The frequency difference is input into the frequency control loop to generate a second control signal to adjust the speed of the engine and the output frequency of the generator, that is, the frequency difference is input into the frequency control loop, and a second control signal for driving the speed governor is calculated by the control algorithm of the loop to adjust the speed of the engine and the output frequency of the generator;

[0152] The first control signal is output to the voltage regulator, and the second control signal is output to the speed governor to drive the generator set to perform output adjustment operation.

[0153] In some embodiments, in response to the phase difference meeting the preset closing condition, a closing control operation is performed, including:

[0154] The real-time phase difference is monitored, and the real-time phase difference is compared with the preset closing condition;

[0155] In response to the real-time phase difference meeting the preset closing condition, a closing control operation is triggered and performed, wherein the closing control operation includes: in the wireless automatic synchronization mode, the operation and maintenance terminal sends a closing instruction to the electric operating mechanism of the power side circuit breaker; in the wireless manual visual synchronization mode, the operation and maintenance terminal provides a closing prompt information to the operator, and manually operates the circuit breaker to close based on the prompt information.

[0156] The above-mentioned edge computing-based method for wireless synchronization of generator sets includes: acquiring a first target parameter, the first target parameter including a first voltage and a first frequency signal of the mains power source collected from the mains power source; acquiring a second target parameter, the first target parameter including a second voltage and a second frequency signal of the generator collected from the generator set; processing the first target parameter and the second target parameter using a maintenance terminal on the mains power source to determine a target difference parameter between the mains power source and the generator set, the target difference parameter including a phase difference, a voltage difference, and a frequency difference; sending the target difference parameter obtained from the maintenance terminal on the mains power source to the intelligent controller on the generator set based on a low-power wireless communication network; and based on the received target difference parameter, [further processing is required]. Through a closed-loop control mechanism, the speed governor and voltage regulator on the generator side are adjusted. Simultaneously, the phase difference is monitored by the maintenance terminal on the mains side. When the phase difference meets the preset closing conditions, a closing control operation is executed. This application constructs a high-speed control closed loop by completing the phase difference calculation and closing decision locally on the mains-side maintenance terminal, avoiding the impact of wireless communication delay on closing accuracy. It adopts a "difference direct transmission" mode, transmitting only lightweight adjustment commands, reducing the communication bandwidth requirements, improving the system's anti-interference and reliability. It introduces a multi-mode grid connection mechanism, which can flexibly switch between different modes according to the field equipment conditions, combining high efficiency, safety, and wide adaptability. It effectively solves the problems of high operational risk in traditional wired solutions and large delay and poor accuracy in existing wireless waveform transmission solutions.

[0157] It should be understood that, although Figure 2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 2 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0158] In one embodiment, such as Figure 3 As shown, a wireless synchronization grid-connection system for generator sets based on edge computing is provided, comprising: a first acquisition module, a second acquisition module, a processing module, a transmission module, an adjustment module, and an execution module, wherein:

[0159] The first acquisition module is configured to acquire a first target parameter, wherein the first target parameter comprises a first voltage and a first frequency signal of commercial power collected on a commercial power side;

[0160] The second acquisition module is configured to acquire a second target parameter, wherein the first target parameter comprises a second voltage and a second frequency signal of a generator collected on a generator set side;

[0161] The processing module is configured to process the first target parameter and the second target parameter based on an operation and maintenance terminal on the commercial power side, to determine a target difference parameter of the commercial power side and the generator set side, wherein the target difference parameter comprises a phase difference, a voltage difference and a frequency difference;

[0162] The transmission module is configured to transmit the target difference parameter obtained based on the operation and maintenance terminal on the commercial power side to an intelligent controller on the generator set side based on a micro-power wireless communication network.

[0163] The adjustment module is configured to adjust a speed governor and a voltage regulator on the generator set side based on the received target difference parameter through a closed-loop control mechanism, and simultaneously monitor the phase difference based on the operation and maintenance terminal on the commercial power side.

[0164] The execution module is configured to perform a closing control operation in response to the phase difference meeting a preset closing condition.

[0165] The specific limitations of the generator set wireless synchronization grid-connected system based on edge computing can refer to the limitations of the generator set wireless synchronization grid-connected method based on edge computing described above, and will not be repeated here. Each module in the above generator set wireless synchronization grid-connected system based on edge computing can be realized by software, hardware and combinations thereof, in whole or in part. The above each module can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0166] In one embodiment, a computer device is provided, which can be a terminal, and an internal structure diagram thereof can be as shown in Figure 4As shown in the figure. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The network interface of the computer device is used to communicate with the external terminal through the network connection. The computer program is executed by the processor to implement an edge computing-based generator set wireless synchronization and grid connection method. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc.

[0167] Those skilled in the art can understand that, Figure 4 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0168] In one embodiment, a computer device is provided, including a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the following steps:

[0169] S1: acquiring a first target parameter, the first target parameter including a first voltage and a first frequency signal of the commercial power collected based on the commercial power side;

[0170] S2: acquiring a second target parameter, the first target parameter including a second voltage and a second frequency signal of the generator collected based on the generator set side;

[0171] S3: based on the operation and maintenance terminal of the commercial power side, processing the first target parameter and the second target parameter to determine a target difference parameter of the commercial power side and the generator set side, the target difference parameter including a phase difference, a voltage difference and a frequency difference;

[0172] S4: based on the micro-power wireless communication network, sending the target difference parameter obtained based on the operation and maintenance terminal of the commercial power side to the intelligent controller of the generator set side;

[0173] S5: based on the received target difference parameter, adjusting the speed regulator and the voltage regulator of the generator set side through a closed-loop control mechanism, and at the same time, monitoring the phase difference based on the operation and maintenance terminal of the commercial power side;

[0174] S6: performing a closing control operation in response to the phase difference meeting a preset closing condition.

[0175] In one embodiment, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the following steps:

[0176] S1: obtaining a first target parameter, the first target parameter including a first voltage and a first frequency signal of a commercial power collected based on a commercial power side;

[0177] S2: obtaining a second target parameter, the first target parameter including a second voltage and a second frequency signal of a generator collected based on a generator set side;

[0178] S3: processing the first target parameter and the second target parameter based on an operation and maintenance terminal of the commercial power side to determine a target difference parameter of the commercial power side and the generator set side, the target difference parameter including a phase difference, a voltage difference, and a frequency difference;

[0179] S4: sending the target difference parameter obtained based on the operation and maintenance terminal of the commercial power side to an intelligent controller of the generator set side based on a micro-power wireless communication network;

[0180] S5: adjusting a speed regulator and a voltage regulator of the generator set side based on the received target difference parameter through a closed-loop control mechanism, and monitoring the phase difference based on the operation and maintenance terminal of the commercial power side;

[0181] S6: performing a closing control operation in response to the phase difference meeting a preset closing condition.

[0182] In one embodiment, a computer program product is provided, and the computer program product includes a computer program, and the computer program is executed by a processor to implement the following steps:

[0183] S1: obtaining a first target parameter, the first target parameter including a first voltage and a first frequency signal of a commercial power collected based on a commercial power side;

[0184] S2: obtaining a second target parameter, the first target parameter including a second voltage and a second frequency signal of a generator collected based on a generator set side;

[0185] S3: processing the first target parameter and the second target parameter based on an operation and maintenance terminal of the commercial power side to determine a target difference parameter of the commercial power side and the generator set side, the target difference parameter including a phase difference, a voltage difference, and a frequency difference;

[0186] S4: transmitting, based on the micro-power wireless communication network, a target difference parameter obtained by the operation and maintenance terminal on the side of the power grid to the intelligent controller on the side of the generator set;

[0187] S5: based on the received target difference parameter, adjusting the speed governor and pressure regulator on the side of the generator set through a closed-loop control mechanism, and simultaneously monitoring the phase difference based on the operation and maintenance terminal on the side of the power grid;

[0188] S6: in response to the phase difference meeting a preset closing condition, performing a closing control operation.

[0189] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. Any reference to memory, storage, database or other medium used in the embodiments provided by the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0190] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0191] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are within the scope of the present application.

Claims

1. A method for wireless synchronization and grid connection of generator sets based on edge computing, characterized in that, The method includes: Obtain a first target parameter, which includes a first voltage and a first frequency signal of the mains power collected from the mains power side; Obtain the second target parameter, wherein the first target parameter includes the second voltage and second frequency signals of the generator collected from the generator set side; Based on the maintenance terminal on the mains side, the first target parameter and the second target parameter are processed to determine the target difference parameter between the mains side and the generator set side. The target difference parameter includes phase difference, voltage difference and frequency difference. Based on a low-power wireless communication network, the target difference parameter obtained from the maintenance terminal on the mains side is sent to the intelligent controller on the generator set side. Based on the received target difference parameter, the speed governor and voltage regulator on the generator set side are adjusted through a closed-loop control mechanism. At the same time, the phase difference is monitored by the maintenance terminal on the mains power side. When the phase difference meets the preset closing conditions, a closing control operation is performed.

2. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 1, characterized in that, Obtaining the first target parameters includes: Based on the voltage transformer, the AC voltage signal of the mains side is collected and converted into a first low-voltage isolated analog signal; The analog signal of the first low-voltage isolation is sampled and processed using an analog-to-digital converter to obtain the first target digital signal sequence; Based on the first target digital signal sequence, the first frequency of the mains power side is determined by a zero-crossing detection mechanism, and the first effective value of the mains power side is determined by a root mean square calculation mechanism. The first frequency and the first effective value of the voltage are defined as the first target parameters.

3. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 2, characterized in that, Obtaining the second target parameters includes: The generator output voltage signal on the generator set side is acquired, and the generator output voltage signal is converted into a second low-voltage isolated analog signal; The analog signal of the second low-voltage isolation is sampled and processed using an analog-to-digital converter to obtain the second target digital signal sequence; Based on the second target digital signal sequence, the second frequency on the generator set side is determined by a zero-crossing detection mechanism, and the second effective voltage value on the generator set side is determined by a root mean square calculation mechanism. The second effective voltage value and the second frequency are encapsulated into a data packet and sent to the maintenance terminal on the mains side via a wireless communication network; In response to receiving the data packet, the maintenance terminal on the mains side parses the data packet to obtain the parsed second effective voltage value and the second frequency; The analyzed second voltage RMS value and the second frequency are defined as the second target parameters.

4. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 3, characterized in that, Based on the maintenance terminal on the mains side, the first target parameter and the second target parameter are processed to determine the target difference parameter between the mains side and the generator set side, including: Based on the first target parameter and the second target parameter, perform a difference operation; The difference operation includes: calculating and determining a first difference between the first effective voltage value and the second effective voltage value; calculating and determining a second difference between the first frequency and the second frequency; and calculating and determining a phase difference based on the waveform signals of the first effective voltage value and the second effective voltage value. The first difference is defined as the voltage difference, and the second difference is defined as the frequency difference; The target difference parameter is constructed based on the phase difference, the frequency difference, and the voltage difference.

5. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 4, characterized in that, Before sending the target difference parameter obtained from the maintenance terminal on the mains side to the intelligent controller on the generator set side based on a low-power wireless communication network, the method includes: Obtain real-time evaluation parameters, and determine a first evaluation score based on the real-time evaluation parameters and the comprehensive evaluation model. The comprehensive evaluation model is trained and determined based on historical evaluation parameters, and includes: in, This represents the overall evaluation value. and These represent the phase error caused by delay, the phase error caused by asynchronous sampling, the phase error caused by harmonic distortion, the phase error caused by noise interference, and the system's fixed phase deviation, respectively. Indicates the system frequency. Indicates the total delay time. This indicates the maximum time deviation between the sampling times of the two voltage signals; Based on the first mapping relationship between the comprehensive evaluation value and the evaluation score, the first evaluation score corresponding to the comprehensive evaluation value is determined; Determine fixed error terms and random error terms, and based on the fixed error terms and random error terms, determine a first error reference value. At the same time, obtain second error reference values ​​corresponding to historical fixed error terms and historical random error terms. The second evaluation score is determined based on the first error reference value and the second error reference value; Based on the first evaluation score and the second evaluation score, the deviation adjustment parameter is determined; Based on the deviation adjustment parameters, the target difference parameter is adjusted, and the adjusted target difference parameter is sent to the intelligent controller on the generator set side.

6. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 5, characterized in that, Determine fixed error terms and random error terms; based on the fixed error terms and random error terms, determine a first error reference value; simultaneously, obtain second error reference values ​​corresponding to historical fixed error terms and historical random error terms; based on the first error reference value and the second error reference value, determine a second evaluation score, including: Based on the error reference value calculation function, the first error reference value and the second error reference value are calculated and determined respectively, wherein the error reference value calculation function includes: in, Indicates the error reference value. Indicates a fixed error term. Represents the random error term. Indicates the confidence factor; The first error reference value and the second error reference value are defined as the y coordinate and z coordinate in the three-dimensional coordinate system, respectively, and the time nodes corresponding to the first error reference value and the second error reference value are defined as the x coordinate, wherein the time nodes corresponding to the first error reference value and the second error reference value are the same; The second evaluation score is determined based on a scoring function, which includes: in, Indicates the evaluation value. These represent the current time node. The second error reference value and the first error reference value, Representing time nodes The second error reference value and the first error reference value, Representing time nodes The second error reference value and the first error reference value; Based on the second mapping relationship between the evaluation value and the evaluation score, the second evaluation score corresponding to the evaluation value is determined.

7. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 6, characterized in that, Based on the first evaluation score and the second evaluation score, the deviation adjustment parameters are determined as follows: Determine the absolute value of the difference between the first evaluation score and the second evaluation score; In response to the absolute value of the difference being greater than or equal to a preset threshold, the deviation adjustment parameter corresponding to the absolute value of the difference is determined based on the mapping relationship between the absolute value of the difference and the deviation adjustment parameter.

8. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 7, characterized in that, Based on the received target difference parameter, the speed governor and voltage regulator on the generator set side are adjusted through a closed-loop control mechanism, including: Receive the target difference parameter, which includes at least voltage difference and frequency difference; The voltage difference and the frequency difference are respectively input to a closed-loop control loop, which includes a voltage control loop and a frequency control loop, comprising: The voltage difference is input to the voltage control circuit to generate a first control signal to adjust the generator's output voltage; The frequency difference is input to the frequency control loop to generate a second control signal to adjust the engine speed and the generator output frequency. The first control signal is output to the voltage regulator, and the second control signal is output to the speed governor to drive the generator set to perform output regulation operation.

9. The method for wireless synchronization and grid connection of generator sets based on edge computing according to claim 8, characterized in that, When the phase difference meets the preset closing conditions, the closing control operation includes: Monitor the real-time phase difference and compare the real-time phase difference with the preset closing conditions; In response to the real-time phase difference meeting the preset closing conditions, a closing control operation is triggered and executed. The execution of the closing control operation includes: in wireless automatic synchronization mode, the maintenance terminal sends a closing command to the electrical operating mechanism of the mains-side circuit breaker; in wireless manual visual synchronization mode, the maintenance terminal provides closing prompt information to the operator, and the operator manually closes the circuit breaker based on the prompt information.

10. A wireless synchronization and grid connection system for generator sets based on edge computing, characterized in that, The system includes: The first acquisition module is used to acquire the first target parameter, which includes the first voltage and first frequency signal of the mains power collected from the mains power side; The second acquisition module is used to acquire the second target parameters, wherein the first target parameters include the second voltage and second frequency signals of the generator collected from the generator set side; The processing module is used to process the first target parameter and the second target parameter based on the maintenance terminal on the mains side, and determine the target difference parameter between the mains side and the generator set side. The target difference parameter includes phase difference, voltage difference and frequency difference. The transmission module is used to send the target difference parameters obtained from the maintenance terminal on the mains side to the intelligent controller on the generator set side based on a low-power wireless communication network. The adjustment module is used to adjust the speed governor and voltage regulator on the generator set side based on the received target difference parameter through a closed-loop control mechanism, while monitoring the phase difference based on the maintenance terminal on the mains power side. The execution module is used to perform a closing control operation in response to the phase difference meeting the preset closing conditions.

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