Power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations

Abstract

The present invention discloses a power supply control method for oil and gas field mining, energy storage, and grid-connected fracturing operations. In the energy storage system, an SVG reactive compensation device and an SVR feeder automatic voltage regulator for reactive compensation are added. The intelligent controller of the system collects, analyzes, judges, processes, and then sends a signal to drive the on-load tap changer to adjust the voltage. The problem of large voltage fluctuations in 10KV distribution lines with the changes of seasons and day and night is solved. Reactive compensation is used to improve the reactive power of the system, which can improve the voltage quality at the end and further reduce the fluctuation problem of the power grid after the load disappears due to voltage fluctuations. The energy storage of the present invention is incorporated into the power grid to jointly realize the load of electric-driven fracturing, ensure the stable construction of the fracturing process, ensure the stability of the power grid, and reduce the waste of power grid resources.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield exploitation power supply, and in particular relates to a power supply control method for oilfield exploitation energy storage grid-connected fracturing operations. Background Art

[0002] In the fracturing process of oil and gas extraction, under the same construction scale, compared with traditional diesel-driven fracturing, the output power of the electric-driven fracturing skid is increased by 50%, while the noise generated is reduced by 20%.

[0003] However, the promotion of electric fracturing faces many difficulties. The quality of the power grid in Shaanxi, Gansu, Ningxia and other places is poor and very unstable. The 10kv dedicated line used in the early drilling process can only meet the drilling needs, and the fracturing equipment cannot use this power grid. If a new 10kv or 35kv dedicated line is added, it will face a long approval cycle and high cost, which cannot meet the use and promotion of electric fracturing. The existing energy storage technology is connected to the grid and follows the load fluctuation of the fracturing equipment, and the power changes in real time, and the grid voltage is unstable. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a power supply control method for energy storage and grid-connected fracturing operations in oil and gas field exploitation. The energy storage is integrated into the power grid to jointly realize the load of electric-driven fracturing, ensure the stable construction of the fracturing process, ensure the stability of the power grid, and reduce the waste of power grid resources.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operation, comprising the steps of:

[0006] S100, when the fracturing equipment starts to work, the power supply control system detects the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment in real time;

[0007] S200, when the fracturing equipment is working, reactive power Q is generated first. When the power supply control system detects that the reactive power Q of the equipment increases, it sends a command to the SVG reactive compensation device, and the SVG reactive compensation device compensates according to the detected real-time reactive demand; at the same time, if the power supply control system detects that the voltage V decreases, it controls the SVR feeder automatic voltage regulator to increase the gear, so as to ensure that the fracturing equipment will not be under-voltage protected due to low voltage;

[0008] S300, when the power of the fracturing equipment increases rapidly, the power supply control system sends a start command to the SVG reactive power compensation device and the SVR feeder automatic voltage regulator again to compensate for reactive power and undervoltage;

[0009] S400, when the power of the fracturing equipment continues to increase, the power required by the fracturing equipment exceeds the threshold set for the apparent power at the grid end, i.e., the power demand of the fracturing equipment is detected, and the power supply control system sends a power demand instruction to the energy storage system and the SVG reactive power compensation device. The energy storage system outputs according to the active power demand of the fracturing equipment to compensate for the insufficient active power of the grid, thereby achieving the purpose of capacity expansion; the SVG reactive power compensation device performs reactive power compensation;

[0010] S500, when the fracturing equipment reaches normal power and continues to work, the energy storage system, SVG reactive power compensation device and SVR feeder automatic voltage regulator maintain the corresponding power and voltage output;

[0011] S600, when the fracturing work is about to end, the power demand of the equipment begins to decrease, and the power supply control system detects that the power demand of the fracturing equipment is reduced, and the voltage at the power supply input end of the fracturing equipment increases; the power supply control system sends a power reduction instruction to the energy storage system and the SVG reactive power compensation device, and when the power of the fracturing equipment is less than the threshold given by the power grid, the energy storage system starts to stop power output;

[0012] S700, when the power demand of the fracturing equipment continues to decrease, the active power at the grid end decreases, and the voltage at the input end of the fracturing equipment begins to rise. The power supply control system sends a downshift command to the SVR feeder automatic voltage regulator to reduce the voltage; at the same time, the power supply control system continues to send a reactive power reduction demand command to the SVG reactive power compensation device, thereby reducing reactive power output;

[0013] S800, when the fracturing equipment is finished working, the energy storage system is in standby state, ready for the next work at any time; the SVG reactive power compensation device provides reactive power support, and the power supply control system is in standby state.

[0014] Furthermore, the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment are detected in real time by means of a CT transformer and a PT transformer arranged at the power supply input end of the fracturing equipment.

[0015] Furthermore, in step S200, when the detected voltage V is lower than 10.3 kV, the system controller sends a gear-up command to the SVR feeder automatic voltage regulator, and the SVR feeder automatic voltage regulator increases the voltage on the grid side, which is lower than 10.3 kV, to 10.5 kV by adjusting the transformation ratio of the primary and secondary sides of the transformer, and controls the voltage at the input end of the fracturing equipment to be maintained at 10.3-10.8 kV, so as to prevent the fracturing equipment from being under-voltage protected due to low voltage; if the voltage V is not lower than 10.3 kV, the gear of the SVG reactive compensation device is maintained.

[0016] Furthermore, in step S300, when the power of the fracturing equipment is increased, the active power P and the reactive power Q will be increased instantly. When the rapid change of the active power P and the reactive power Q is detected, the reactive power on the grid side is greater than 0, and the active power P is greater than the apparent power of the grid, a start-up instruction is sent to the SVG reactive power compensation device and the energy storage system again to adjust the active and reactive power. When the output voltage is lower than 10.3 kV, a start-up instruction is sent to the SVR feeder automatic voltage regulator to compensate for the voltage undervoltage.

[0017] Furthermore, in step S400, if the power required by the fracturing equipment exceeds the threshold set for the apparent power at the grid end, the energy storage system is started; the active power P of the fracturing equipment increases, and the output of the energy storage system increases; the active power P of the fracturing equipment remains unchanged, the output of the energy storage system is maintained, and the SVG reactive power compensation device maintains the reactive power Q output; the active power P of the fracturing equipment decreases, the output of the energy storage system decreases, and the SVG reactive power compensation device reduces the reactive power Q output.

[0018] Furthermore, in step S600, when the power demand of the fracturing equipment continues to decrease, the active power at the grid end decreases, and the voltage at the input end of the fracturing equipment begins to rise. When it is higher than 10.8 kV, the power supply control system sends a downshift instruction to the SVR feeder automatic voltage regulator, and uses the winding slider of the transformer in the SVR feeder automatic voltage regulator to change the transformation ratio and reduce the voltage. At the same time, the power supply control system continues to send the reactive power reduction demand instruction to the SVG reactive compensation device, thereby reducing the reactive power output.

[0019] On the other hand, the present invention proposes a power supply control system for oil and gas field exploitation, energy storage, and grid-connected fracturing operations, including a sensor, a power supply control system, an energy storage system, an SVG reactive power compensation device, and an SVR feeder automatic voltage regulator; the sensor is arranged at the power supply input end of the fracturing equipment, and detects the voltage V, apparent power S, current I, active power P, and reactive power Q at the input end of the fracturing equipment in real time; the sensor transmits the collected signal to the power supply control system, and the control command after analysis and processing by the power supply control system is sent to the control end of the energy storage system, the SVG reactive power compensation device, and the SVR feeder automatic voltage regulator; the SVG reactive power compensation device performs voltage compensation and outputs the compensation to the AC bus I connected to the power grid; the SVR feeder automatic voltage regulator performs reactive power regulation compensation and connects the AC bus I with the AC bus II; the energy storage system is connected to the AC bus II through the energy storage converter and the energy storage boost transformer; the power supply end of the electric-driven fracturing equipment is connected to the AC bus II.

[0020] Furthermore, the sensor includes a CT transformer and a PT transformer, which are arranged at the power supply input end of the detection fracturing equipment to detect the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment in real time.

[0021] The beneficial effects of adopting this technical solution are:

[0022] After the energy storage is connected to the oilfield power supply system, the power grid left over from drilling when not fracturing is used is used to charge the energy storage system; when electric drive is used for fracturing, the energy storage is incorporated into the power grid to jointly realize the load of electric drive fracturing and ensure the construction of the fracturing process. At night, the ability of energy storage to shift electricity can be used to obtain peak-valley price differences, reduce charging costs, and reduce the waste of power grid resources. When encountering an emergency power outage caused by line failure or maintenance, the energy storage can be switched to and from the grid, and the off-grid can drive the electric drive fracturing to ensure the safety of the wellbore and improve the safety of the fracturing operation.

[0023] After energy storage is connected, the present invention can obtain the peak-valley price difference of the power grid, charge in the valley section of the power grid at night, and discharge in the peak section of the power grid during the day, thereby reducing the electricity cost of oil and gas fracturing operations, so as to adapt to the needs of the power grid in real time, help maintain the supply and demand balance of the power system, and ensure the frequency and voltage stability of the power system.

[0024] The present invention adds an SVG reactive compensation device and an SVR feeder automatic voltage regulator for reactive compensation to the energy storage system. The system's intelligent controller collects, analyzes, judges, processes, and then sends a signal to drive the on-load tap changer to adjust the voltage. The problem of large voltage fluctuations in 10KV distribution lines with seasonal and day-night changes is solved. Reactive compensation is used to improve the reactive power of the system, which can improve the voltage quality at the end and further reduce the fluctuation problem of the power grid after the load disappears due to voltage fluctuations. The terminal voltage is stabilized within 10.5-10.8kV, which solves the problem of shutdown of the electric-driven fracturing equipment caused by too low power grid voltage.

[0025] The energy storage management system of the present invention collects the active power of the power grid, load, and energy storage, and stabilizes the apparent power of the power grid within a certain range through software control and judgment. When the apparent power of the well site load is less than the apparent power threshold set by the energy management system, the power grid provides power to the load; when the apparent power of the well site load is greater than the apparent power threshold set by the energy management system, and exceeds the power provided by the power grid, the excess part is compensated by the active power output of the energy storage system to the power grid for use by the fracturing load inside the well site. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic flow chart of a power supply control method for oil and gas field exploitation, energy storage, grid-connected fracturing operations according to the present invention;

[0027] Figure 2 This is a schematic diagram of a power supply control system for oilfield mining, energy storage, grid-connected fracturing operations in an embodiment of the present invention;

[0028] Figure 3 This is a connection diagram of a power supply control system for oilfield exploitation, energy storage, grid-connected fracturing operations in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described below with reference to the accompanying drawings.

[0030] In this embodiment, see Figure 1 As shown, the present invention proposes a power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations, comprising the steps of:

[0031] S100, when the fracturing equipment starts to work, the power supply control system detects the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment in real time;

[0032] S200, when the fracturing equipment is working, reactive power Q is generated first. When the power supply control system detects that the reactive power Q of the equipment increases, it sends a command to the SVG reactive compensation device, and the SVG reactive compensation device compensates according to the detected real-time reactive demand; at the same time, if the power supply control system detects that the voltage V decreases, it controls the SVR feeder automatic voltage regulator to increase the gear, so as to ensure that the fracturing equipment will not be under-voltage protected due to low voltage;

[0033] S300, when the power of the fracturing equipment increases rapidly, the power supply control system sends a start command to the SVG reactive power compensation device and the SVR feeder automatic voltage regulator again to compensate for reactive power and undervoltage;

[0034] S400, when the power of the fracturing equipment continues to increase, the power required by the fracturing equipment exceeds the threshold value set for the apparent power of the grid (generally set to 50%-90% of the apparent power of the grid), that is, the power demand of the fracturing equipment is detected, and the power supply control system sends a power demand instruction to the energy storage system and the SVG reactive power compensation device. The energy storage system outputs according to the active power demand of the fracturing equipment to compensate for the insufficient active power of the grid, thereby achieving the purpose of capacity expansion; the SVG reactive power compensation device performs reactive power compensation;

[0035] S500, when the fracturing equipment reaches normal power and continues to work, the energy storage system, SVG reactive power compensation device and SVR feeder automatic voltage regulator maintain the corresponding power and voltage output;

[0036] S600, when the fracturing work is about to end, the power demand of the equipment begins to decrease, and the power supply control system detects that the power demand of the fracturing equipment is reduced, and the voltage at the power supply input end of the fracturing equipment increases; the power supply control system sends a power reduction instruction to the energy storage system and the SVG reactive power compensation device. When the power of the fracturing equipment is less than the threshold given by the power grid (generally set to 50%-90% of the apparent power of the power grid), the energy storage system starts to stop power output;

[0037] S700, when the power demand of the fracturing equipment continues to decrease, the active power at the grid end decreases, and the voltage at the input end of the fracturing equipment begins to rise. The power supply control system sends a downshift command to the SVR feeder automatic voltage regulator to reduce the voltage; at the same time, the power supply control system continues to send a reactive power reduction demand command to the SVG reactive power compensation device, thereby reducing reactive power output;

[0038] S800, when the fracturing equipment is finished working, the energy storage system is in standby state, ready for the next work at any time; the SVG reactive power compensation device provides reactive power support, and the power supply control system is in standby state.

[0039] Preferably, the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment are detected in real time by means of a CT transformer and a PT transformer arranged at the power supply input end of the fracturing equipment.

[0040] As an optimization scheme of the above embodiment, in step S200, when the detected voltage V is lower than 10.3 kV, the system controller sends a gear-up command to the SVR feeder automatic voltage regulator. The SVR feeder automatic voltage regulator increases the voltage on the grid side below 10.3 kV to 10.5 kV by adjusting the transformation ratio of the primary and secondary sides of the transformer, and controls the voltage at the input end of the fracturing equipment to be maintained at 10.3-10.8 kV, so as to prevent the fracturing equipment from being under-voltage protected due to low voltage; if the voltage V is not lower than 10.3 kV, the gear of the SVG reactive compensation device is maintained.

[0041] As an optimization scheme of the above embodiment, in step S300, when the power of the fracturing equipment is increased, the active power P and the reactive power Q will be increased instantly. When the rapid change of the active power P and the reactive power Q is detected, the reactive power on the grid side is greater than 0, and the active power P is greater than the apparent power of the grid, a start-up instruction is sent to the SVG reactive power compensation device and the energy storage system again to adjust the active and reactive power. When the output voltage is lower than 10.3kV, a start-up instruction is sent to the SVR feeder automatic voltage regulator to compensate for the voltage undervoltage.

[0042] As an optimization scheme of the above embodiment, in step S400, if the power required by the fracturing equipment exceeds the threshold set for the apparent power at the grid end, the energy storage system is started; the active power P of the fracturing equipment increases, and the output of the energy storage system increases; the active power P of the fracturing equipment remains unchanged, the output of the energy storage system is maintained, and the SVG reactive power compensation device maintains the reactive power Q output; the active power P of the fracturing equipment decreases, the output of the energy storage system decreases, and the SVG reactive power compensation device reduces the reactive power Q output.

[0043] As an optimization scheme of the above embodiment, in step S600, when the power demand of the fracturing equipment continues to decrease, the active power at the grid end decreases, and the voltage at the input end of the fracturing equipment starts to rise. When it is higher than 10.8 kV, the power supply control system sends a downshift command to the SVR feeder automatic voltage regulator, and uses the winding slider of the transformer in the SVR feeder automatic voltage regulator to change the transformation ratio and reduce the voltage; at the same time, the power supply control system continues to send the reactive power reduction demand instruction to the SVG reactive compensation device, thereby reducing the reactive power output.

[0044] To cooperate with the implementation of the method of the present invention, based on the same inventive concept, such as Figure 2 and Figure 3 As shown, the present invention proposes a power supply control system for oil and gas field exploitation energy storage and grid-connected fracturing operations, including a sensor, a power supply control system, an energy storage system, an SVG reactive power compensation device and an SVR feeder automatic voltage regulator; the sensor is arranged at the power supply input end of the fracturing equipment, and detects the voltage V, apparent power S, current I, active power P and reactive power Q of the fracturing equipment input end in real time; the sensor transmits the collected signal to the power supply control system, and the control command after analysis and processing by the power supply control system is sent to the energy storage system, the SVG reactive power compensation device and the control end of the SVR feeder automatic voltage regulator; the SVG reactive power compensation device performs voltage compensation and outputs the compensation to the AC bus I connected to the power grid; the SVR feeder automatic voltage regulator performs reactive power regulation compensation and connects the AC bus I with the AC bus II; the energy storage system is connected to the AC bus II through the energy storage converter and the energy storage step-up transformer; the power supply end of the electric drive fracturing equipment is connected to the AC bus II.

[0045] Preferably, the sensor includes a CT transformer and a PT transformer, and the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment are detected in real time by arranging the CT transformer and the PT transformer at the power supply input end of the fracturing equipment.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations, characterized in that: Includes steps: S100, when the fracturing equipment starts to work, the power supply control system detects the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment in real time; S200, when the fracturing equipment is working, reactive power Q is generated first. When the power supply control system detects that the reactive power Q of the equipment increases, it sends a command to the SVG reactive compensation device, and the SVG reactive compensation device compensates according to the detected real-time reactive demand; at the same time, if the power supply control system detects that the voltage V decreases, it controls the SVR feeder automatic voltage regulator to increase the gear, so as to ensure that the fracturing equipment will not be under-voltage protected due to low voltage; S300, when the power of the fracturing equipment increases rapidly, the power supply control system sends a start command to the SVG reactive power compensation device and the SVR feeder automatic voltage regulator again to compensate for reactive power and undervoltage; S400, when the power of the fracturing equipment continues to increase, the power required by the fracturing equipment exceeds the threshold set for the apparent power at the grid end, i.e., the power demand of the fracturing equipment is detected, and the power supply control system sends a power demand instruction to the energy storage system and the SVG reactive power compensation device. The energy storage system outputs according to the active power demand of the fracturing equipment to compensate for the insufficient active power of the grid, thereby achieving the purpose of capacity expansion; the SVG reactive power compensation device performs reactive power compensation; S500, when the fracturing equipment reaches normal power and continues to work, the energy storage system, SVG reactive power compensation device and SVR feeder automatic voltage regulator maintain the corresponding power and voltage output; S600, when the fracturing work is about to end, the power demand of the equipment begins to decrease, and the power supply control system detects that the power demand of the fracturing equipment is reduced, and the voltage at the power supply input end of the fracturing equipment increases; the power supply control system sends a power reduction instruction to the energy storage system and the SVG reactive power compensation device, and when the power of the fracturing equipment is less than the threshold given by the power grid, the energy storage system starts to stop power output; S700, when the power demand of the fracturing equipment continues to decrease, the active power at the grid end decreases, and the voltage at the input end of the fracturing equipment begins to rise. The power supply control system sends a downshift command to the SVR feeder automatic voltage regulator to reduce the voltage; at the same time, the power supply control system continues to send a reactive power reduction demand command to the SVG reactive power compensation device, thereby reducing reactive power output; S800, when the fracturing equipment is finished working, the energy storage system is in standby state, ready for the next work at any time; the SVG reactive power compensation device provides reactive power support, and the power supply control system is in standby state.

2. A power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations according to claim 1, characterized in that: The voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment are detected in real time by setting up a CT transformer and a PT transformer at the power supply input end of the fracturing equipment.

3. A power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations according to claim 1, characterized in that: In step S200, when the detected voltage V is lower than 10.3 kV, the system controller sends a shift-up command to the SVR feeder automatic voltage regulator. The SVR feeder automatic voltage regulator increases the voltage on the grid side, which is lower than 10.3 kV, to 10.5 kV by adjusting the transformation ratio of the primary and secondary sides of the transformer, and controls the voltage at the input end of the fracturing equipment to be maintained at 10.3-10.8 kV, so as to prevent the fracturing equipment from being under-voltage protected due to low voltage; if the voltage V is not lower than 10.3 kV, the gear of the SVG reactive compensation device is maintained.

4. A power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations according to claim 1, characterized in that: In step S300, when the power of the fracturing equipment is increased, the active power P and the reactive power Q will be increased instantly. When the rapid changes of the active power P and the reactive power Q are detected, the reactive power on the grid side is greater than 0, and the active power P is greater than the apparent power of the grid, a start-up instruction is sent to the SVG reactive power compensation device and the energy storage system again to adjust the active and reactive power. When the output voltage is lower than 10.3 kV, a start-up instruction is sent to the SVR feeder automatic voltage regulator to compensate for the voltage undervoltage.

5. A power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations according to claim 1, characterized in that: In step S400, if the power required by the fracturing equipment exceeds the threshold set for the apparent power at the grid end, the energy storage system is started; the active power P of the fracturing equipment increases, and the output of the energy storage system increases; the active power P of the fracturing equipment remains unchanged, the output of the energy storage system is maintained, and the SVG reactive power compensation device maintains the reactive power Q output; the active power P of the fracturing equipment decreases, the output of the energy storage system decreases, and the SVG reactive power compensation device reduces the reactive power Q output.

6. A power supply control method for oil and gas field mining, energy storage, grid-connected fracturing operations according to claim 1, characterized in that: In step S600, when the power demand of the fracturing equipment continues to decrease, the active power at the grid end decreases, and the voltage at the input end of the fracturing equipment starts to rise. When it is higher than 10.8 kV, the power supply control system sends a downshift instruction to the SVR feeder automatic voltage regulator, and uses the winding slider of the transformer in the SVR feeder automatic voltage regulator to change the transformation ratio and reduce the voltage. At the same time, the power supply control system continues to send the reactive power reduction demand instruction to the SVG reactive power compensation device, thereby reducing the reactive power output.

7. A power supply control system for oil and gas field mining, energy storage, grid-connected fracturing operations, characterized in that: A power supply control method for oil and gas field exploitation energy storage grid-connected fracturing operation based on any one of claims 1-6, the power supply control system for oil and gas field exploitation energy storage grid-connected fracturing operation includes a sensor, a control unit, an energy storage system, an SVG reactive power compensation device and an SVR feeder automatic voltage regulator; the sensor is arranged at the power supply input end of the fracturing equipment, and detects the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment in real time; the sensor transmits the collected signal to the control unit, and the control unit sends the control instruction after analysis and processing to the energy storage system, the SVG reactive power compensation device and the control end of the SVR feeder automatic voltage regulator; the SVG reactive power compensation device performs voltage compensation and outputs compensation to the AC bus I connected to the power grid; the SVR feeder automatic voltage regulator performs reactive power regulation compensation and connects the AC bus I with the AC bus II; the energy storage system is connected to the AC bus II through the energy storage converter and the energy storage step-up transformer; the power supply end of the electric-driven fracturing equipment is connected to the AC bus II.

8. A power supply control system for oil and gas field mining, energy storage, grid-connected fracturing operations according to claim 7, characterized in that: The sensor includes a CT transformer and a PT transformer, which are arranged at the power supply input end of the detection fracturing equipment to detect the voltage V, apparent power S, current I, active power P and reactive power Q at the input end of the fracturing equipment in real time.

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