Electrically-driven fracturing fluid continuous mixing skid control room

Abstract

The utility model relates to an electrically-driven fracturing fluid continuous mixing skid control room which comprises a control room and a frequency conversion room which are separated from each other. A human-computer interface and a continuous mixing operation control system are arranged in the control room, the human-computer interface is used for displaying the mortar liquid level and receiving instructions, and the continuous mixing operation control system comprises an automatic liquid level control system, a discharge pressure control system, an automatic liquid adding control system and an automatic sand concentration control system. The controller is used for determining rotating speeds of devices such as a suction pump, a discharge pump, a liquid adding pump, an injection pump and a stirrer and outputting rotating speed instructions. The frequency conversion chamber comprises various motor rotating speed control systems and is used for performing frequency conversion control according to rotating speed instructions. According to the utility model, the technical problems of low transmission efficiency, low control precision, slow response speed, inconvenience in operation and maintenance, unsuitability for outdoor operation and the like of the traditional liquid-driven mixing vehicle in fracturing construction are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid mixing in oil and gas field fracturing construction, and particularly relates to a control room for an electric-driven fracturing fluid continuous mixing skid. Background Art

[0002] Fracturing construction is the main means of current oil and gas production increase. In the traditional process flow, liquid mixing is a separate process before fracturing construction. Fracturing fluid is batch-prepared before fracturing construction and stored in a liquid tank. When operation is required, it is transported to the fracturing construction site by a tanker truck and poured into the pipeline of the fracturing truck group to complete the fracturing construction. This process of pre-preparing fracturing fluid at a fixed liquid mixing station has many problems. For example, the distance between the liquid mixing station and the construction site is far, the transportation is time-consuming and laborious, the remaining amount of fracturing fluid mixing is large, resulting in waste, and the fracturing fluid formula cannot be adjusted in time according to the on-site situation. In view of the disadvantages of the traditional mixing process, each manufacturer has developed a large-displacement continuous fracturing mixing truck. This device can stir guar gum solution and water in a swelling tank according to a certain ratio at the construction site to obtain fracturing fluid, and can realize functions such as mixing on-site and adjusting the formula immediately according to on-site conditions, ensuring that the liquid mixing and fracturing construction are carried out in real time and improving the fracturing construction efficiency.

[0003] Currently, the main type of fracturing fluid continuous mixing equipment in the market is still the liquid-driven mixing truck, which mainly consists of mechanisms such as a power system, a hydraulic system, a powder material system, a mixing system, a liquid addition system, and a control system. It provides power through diesel engines under the vehicle and on the vehicle, transmits the power to the oil pump through hydraulic pressure to drive the hydraulic motor, and then controls the actions of pumps such as the suction pump, the discharge pump, and the liquid addition pump to achieve the control of the displacement and the addition amount. After comprehensive analysis of the control systems of existing liquid-driven mixing skids and electric-driven mixing skids, the following several disadvantages exist:

[0004] 1) The hydraulic system has a complex structure;

[0005] 2) The transmission efficiency is low;

[0006] 3) The control accuracy is low and the response speed is slow;

[0007] 4) High emissions and high noise;

[0008] 5) High maintenance costs. Content of the Utility Model

[0009] In view of the deficiencies in the related technologies, the utility model provides a control room for an electric-driven fracturing fluid continuous mixing skid, which is used in cooperation with the electric-driven fracturing fluid continuous mixing skid, solves the problems of the traditional fracturing fluid continuous mixing equipment such as complex structure, low efficiency, poor accuracy, and high noise, and meets the needs of the mixing skid for outdoor open-air work.

[0010] In a possible implementation, an electrically-driven continuous mixing skid control room is provided, including: a separated control room and a variable frequency room. The control room includes: a human-machine interface and a continuous mixing operation control system;

[0011] The human-machine interface is used to display real-time data of continuous mixing operations such as the liquid level of the mixing tank, discharge pressure, discharge flow rate, suction flow rate, liquid addition flow rate, motor temperature, frequency converter parameters, and valve switch status, and receive one or more of the following instructions: continuous mixing operation start instruction, continuous mixing operation stop instruction, target liquid level of the mixing tank, target discharge pressure, target discharge flow rate, liquid addition dosage, and target sand concentration, etc.;

[0012] The continuous mixing operation control system includes: an automatic liquid level control system, a discharge pressure control system, an automatic liquid addition control system, and an automatic sand concentration control system, which are used to determine the speed of one or more of the suction pump, discharge pump, injection pump, liquid addition pump, sand conveying motor, and mixing motor according to one or more of the above instructions, and output speed instructions. At the same time, determine the switch status and opening degree of each electric valve on the pipeline, and output switch instructions and opening degree instructions;

[0013] The variable frequency room includes: a suction pump motor speed control system, a discharge pump motor speed control system, a liquid addition pump motor speed control system, an injection pump motor speed control system, and a sand conveying motor speed control system, which are used to perform variable frequency control on one or more of the frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor according to the speed instructions output by the continuous mixing operation control system;

[0014] Among them, the frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor are placed in the frequency conversion cabinets in the variable frequency room;

[0015] The variable frequency room also includes: a switch cabinet and an incoming line cabinet, and the frequency conversion cabinet, switch cabinet, and incoming line cabinet are arranged adjacent to each other;

[0016] The main power supply is connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor respectively through the main circuit breaker, switch, and the frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor; the main power supply is connected to the valve electric actuator through the main circuit breaker and switch.

[0017] In a possible implementation, it further includes: a control and auxiliary power supply module, including a 3kVA uninterruptible power supply (UPS), which is connected between the main circuit breaker and each switch through an isolation transformer; among them, the uninterruptible power supply (UPS) is installed in the console in the control room, and the isolation transformer is installed in the switch cabinet in the variable frequency room.

[0018] In a possible implementation, it further includes: an integrated industrial air conditioner embedded in the frequency conversion room machine room.

[0019] In a possible implementation, the climbing ladder is arranged around the frequency conversion room.

[0020] In a possible implementation, a soundproof door is installed between the control room and the frequency conversion room.

[0021] In a possible implementation, the main circuit breaker is placed in the incoming line cabinet of the frequency conversion room, the switch connecting the main circuit breaker and the frequency converter is placed in the switch cabinet, and the connecting wire is placed in the incoming line cabinet.

[0022] In a possible implementation, it further includes: an outdoor air conditioner unit mounted on the outer wall of the control room, and an indoor air conditioner unit mounted on the inner wall of the control room.

[0023] In a possible implementation, the control room adopts an integral frame structure, and the control room and the frequency conversion room are installed on the same frame beam and can be hoisted as a whole.

[0024] Based on the above technical solutions, the control room of the electric drive mixing skid of the present utility model realizes the efficient control of the continuous mixing operation by setting a separated control room and frequency conversion room, as well as the human-machine interface and continuous mixing operation control system in the control room. The human-machine interface can receive and display key operation instructions and mortar liquid levels, while the continuous mixing operation control system adjusts the rotation speeds of various pumps and motors according to the received instructions to optimize the mixing process. The multiple speed control systems in the frequency conversion room perform precise frequency conversion control according to the output of the control system, ensuring the accuracy and efficiency of the continuous mixing operation. In addition, by introducing auxiliary facilities such as an auxiliary power supply module, an air conditioning system, a climbing ladder, and a soundproof door, the reliability of the equipment and the comfort of the operating environment are improved. Generally speaking, the present utility model effectively improves the automation level and operation efficiency of the mixing control, and ensures the stability and reliability of the continuous mixing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0026] Figure 1 It is a schematic structural diagram of the control room of the electric drive fracturing fluid continuous mixing skid according to an embodiment of the present utility model;

[0027] Figure 2 It is an electrical connection schematic diagram of the control room of the electric drive fracturing fluid continuous mixing skid according to an embodiment of the present utility model;

[0028] Figure 3This is the drive circuit diagram of the continuous mixing operation control system for one embodiment of the present utility model.

[0029] In the figure:

[0030] 1 - Control room, 2 - Frequency conversion room, 3 - Human - machine interface, 4 - Frequency conversion cabinet, 5 - Switch cabinet, 6 - Incoming line cabinet, 10 - Integrated industrial air conditioner, 11 - Air conditioner outdoor unit, 12 - Climbing ladder, 13 - Sound - proof door, 14 - Control room door. Specific embodiments

[0031] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0032] In the description of the present utility model, it should be understood that the terms "center", "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0033] The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In order to solve the technical problems existing in traditional liquid - driven mixing trucks during fracturing construction, such as low transmission efficiency, low control accuracy, slow response speed, etc., the present application provides a control room for an electric - driven continuous mixing skid of fracturing fluid.

[0036] According to one aspect of the present application, refer toFigure 1 and Figure 3 , in a possible implementation, the present invention provides a control room for an electric drive fracturing fluid continuous mixing skid. The control room includes a separated control room 1 and a frequency conversion room 2. The control room is provided with a human-machine interface 3 and a continuous mixing operation control system; the human-machine interface 3 is used to display real-time data of continuous mixing operations such as the liquid level of the mixing tank, discharge pressure, discharge flow rate, suction flow rate, liquid addition flow rate, motor temperature, frequency converter parameters, and valve switch status, and receive one or more of the following instructions: mixing operation start instruction, mixing operation stop instruction, target liquid level of the mixing tank, target discharge pressure, target discharge flow rate, liquid addition dosage, and target sand concentration, etc.; the continuous mixing operation control system includes an automatic liquid level control system, a discharge pressure control system, an automatic liquid addition control system, and an automatic sand concentration control system. This system is used to determine the rotational speed of one or more of the suction pump, discharge pump, injection pump, liquid addition pump, sand conveying motor, and mixing motor according to the received instructions, and output a rotational speed instruction. At the same time, determine the switch status and opening degree of each electric valve on the pipeline, and output a switch instruction and an opening degree instruction; the frequency conversion room 2 includes a suction pump motor speed control system, a discharge pump motor speed control system, a liquid addition pump motor speed control system, an injection pump motor speed control system, and a sand conveying motor speed control system, which are used to perform frequency conversion control on one or more of the frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor according to the rotational speed instruction output by the continuous mixing operation control system. The frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor are placed in the frequency conversion cabinet 4 of the frequency conversion room. The frequency conversion room also includes a switch cabinet 5 and an incoming line cabinet 6, and the frequency conversion cabinet 4, the switch cabinet 5, and the incoming line cabinet 6 are arranged adjacent to each other. The main power supply is connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor through the main circuit breaker, switch, and the frequency converters connected to them respectively; the main power supply is connected to the valve electric actuator through the main circuit breaker and switch.

[0037] In the above implementation, the integrated design of the human-machine interface 3 and the continuous mixing operation control system improves the convenience and accuracy of operation. The human-machine interface 3 can display all key parameters in real time and allows the operator to quickly adjust the set values to cope with changes in the production process. The continuous mixing operation control system automatically adjusts the rotational speed of the pumps and motors through advanced algorithms to maintain the quality and consistency of the mortar and meet different operation requirements.

[0038] The design of the frequency conversion room ensures the effective and safe operation of the power control system. The rotational speed control systems of various motors achieve the optimization of energy consumption and the long-term stable operation of the equipment through precise frequency converter control. In addition, the reasonable layout of the switch cabinet 5 and the incoming line cabinet 6 optimizes the power distribution and maintenance convenience, and improves the overall safety and reliability of the system.

[0039] In the above solution, the drive system realizes high-precision control and fast-response control for continuous mixing operation.

[0040] The hardware applicable to the control system architecture is a 16-way electric drive continuous mixing skid. A master-slave PLC control architecture is proposed. The master PLC controls the continuous mixing operation, including an automatic liquid level control system, a discharge pressure control system, an automatic liquid addition control system, and an automatic sand concentration control system. The output of this control system is the motor speed command, which is sent to the slave PLC. The slave PLC receives the speed command and performs variable-frequency drive control, including the start-stop control and speed control of each variable-frequency motor, etc.

[0041] ModbusTCP communication or Siemens' dedicated S7 communication is used between the two PLCs to transmit variable-frequency status and command information.

[0042] Profinet communication is used between the slave PLC and the frequency converter for the start-stop control, speed control, steering control, emergency stop, and status monitoring of the frequency converter, etc.

[0043] See Figure 2 , the drive main circuit of the continuous mixing operation control system makes full use of the excellent speed control characteristics of the frequency converter to drive the motor, and overcomes the disadvantages of the liquid drive mixing vehicle, such as complex structure, low efficiency, poor precision, and high noise.

[0044] In the electric control room of this embodiment, by separating the control room 1 and the frequency conversion room 2, the layout of the equipment is optimized, electromagnetic interference and noise are reduced, and the stability, reliability of the equipment and the operating comfort of personnel are improved.

[0045] The design of the human-machine interface 3 enables the operator to intuitively obtain the current state of the mortar and easily input control commands, improving the convenience of operation and the accuracy of continuous mixing operation.

[0046] The comprehensive design of the continuous mixing operation control system realizes the precise control of each key parameter in the continuous mixing process, ensures the quality of continuous mixing, and improves the operation efficiency.

[0047] See Figure 2 , in a possible embodiment, it further includes a control and auxiliary power supply module;

[0048] This module includes a 3kVA uninterruptible power supply UPS, which is connected to the main circuit breaker and each switch through an isolation transformer; among them, the uninterruptible power supply UPS is installed in the operating console of the control room, and the isolation transformer is installed in the switch cabinet of the frequency conversion room.

[0049] The control and auxiliary power supply module ensures that key equipment in the control room 1 and the frequency conversion room 2 can still operate normally when there are problems with the main power supply, improving the stability and reliability of the system.

[0050] The addition of the uninterruptible power supply UPS guarantees the continuity of power supply, avoiding production interruptions and potential equipment damage caused by power outages.

[0051] In the above embodiments, a main circuit of variable frequency drive applicable to mixing operations is proposed.

[0052] This drive circuit mainly drives the suction pump motor, discharge pump motor, liquid addition pump motor, powder conveying motor, and injection pump motor to run at the required speeds, achieving the requirements of mixing operations with different displacement and different ratios.

[0053] A main circuit breaker is set in the variable frequency and control room as the power control node of the entire variable frequency drive room, enabling local and remote switching on and off.

[0054] The pre-stage drive circuits of each variable frequency motor mainly consist of a branch circuit breaker, a branch fuse, a branch frequency converter, and a leakage protection device.

[0055] In the mixing system, the agitator motor, powder tank lifting motor, platform lifting motor, and powder dispersion motor only need to run at a fixed frequency. The pre-stage drive circuits of the corresponding fixed frequency motors mainly consist of a branch circuit breaker (including a leakage tripping device) and a contactor.

[0056] In the above embodiments, a control circuit applicable to mixing operations is also proposed.

[0057] Mixing operations have high requirements for system reliability. The control power supply proposed in this patent is obtained by isolating the input from the main circuit breaker through an isolation transformer, avoiding noise and interference in the power supply from affecting the control system and improving the stability and reliability of the circuit.

[0058] At the same time, to ensure an orderly shutdown in the event of sudden situations such as power grid dips or losses, a 3kVA uninterruptible power supply UPS is set after the isolation transformer. The output voltage of the isolation transformer is 220V, and after passing through the UPS, it supplies power to necessary equipment such as the PLC system and lighting lamps.

[0059] A master-slave PLC control architecture applicable to mixing operations is proposed.

[0060] Among them, the master PLC controls continuous mixing operations, including the discharge pressure control system, automatic liquid addition control system, etc. The output of this control system is the motor speed command, which is sent to the slave PLC. The slave PLC receives the speed command and performs variable frequency drive control, including start-stop control and speed control of each variable frequency motor.

[0061] Compared with the existing centralized control architecture that uses a set of PLCs to simultaneously perform variable-frequency drive control and mixing operations, this master-slave distributed architecture has multiple advantages such as independent functions and simplified wiring.

[0062] This application also proposes a complete protection logic and protection measures applicable to mixing operations.

[0063] The protection measures proposed in this patent include, but are not limited to:

[0064] Input overvoltage and undervoltage protection logic: When the system power supply voltage fluctuates too much or the voltage drops, an alarm is given to remind the operator to check the input power supply.

[0065] Input phase sequence reverse connection protection logic: A phase sequence relay is set. When the system power supply phase sequence is incorrect, the output contact of the phase sequence relay disconnects the main circuit breaker to achieve phase sequence reverse connection protection;

[0066] In a possible implementation, it also includes an integrated industrial air conditioner 10 embedded in the variable-frequency room 2 machine room.

[0067] This air-conditioning system keeps the temperature and humidity in the variable-frequency room within the ideal range, avoids damage to equipment caused by high temperature or humidity, extends the service life of the equipment, and at the same time provides a comfortable working environment for the operators.

[0068] This design enhances the stability and reliability of the equipment and improves the overall work efficiency.

[0069] In a possible implementation, it also includes a climbing ladder 12 installed around the variable-frequency room.

[0070] The installation of the climbing ladder provides a safe and convenient way for operators to work at heights, reduces potential risks in work, and improves the efficiency of maintenance and repair.

[0071] In a possible implementation, a soundproof door 13 is installed between the control room and the variable-frequency room.

[0072] The installation of the soundproof door effectively isolates the noise between the control room and the variable-frequency room, provides a quieter working environment for the operators in the control room, reduces the interference of noise to the operators, and improves work comfort and efficiency.

[0073] In a possible implementation, the main circuit breaker is placed in the incoming line cabinet of the variable-frequency room;

[0074] The switch connecting the main circuit breaker and the frequency converter is placed in the switch cabinet 5, and the connecting wire is placed in the incoming line cabinet 6.

[0075] This design makes the power management more centralized and orderly, facilitating monitoring and maintenance.

[0076] The main circuit breaker is placed in the frequency conversion room, and at the same time, remote switch-on and switch-off buttons and emergency stop buttons are set in the control room, which facilitates the operator to quickly cut off the power supply to cope with emergencies and improves safety.

[0077] In a possible implementation, it further includes: an outdoor air conditioner 11 mounted on the outer wall of the control room, and an indoor air conditioner mounted on the inner wall of the control room.

[0078] This installation method of the outdoor air conditioner helps to improve the heat exchange efficiency and ensures the efficient operation of the air conditioning system.

[0079] At the same time, this also helps to reduce the occupation of indoor space and leaves more space in the control room.

[0080] In a possible implementation, the control room adopts an integral frame structure, and the control room and the frequency conversion room are installed on the same frame beam and can be hoisted as a whole.

[0081] The integral frame structure provides high stability and durability, ensuring that the control room can maintain good structural integrity under various environmental conditions.

[0082] In addition, this structural design also facilitates the installation and movement of the control room, improving its flexibility and applicability.

[0083] For the control room of the electric drive fracturing fluid continuous mixing skid in the implementation mode of the present application, the electric drive frequency conversion and the control room adopt an integral frame design, and are internally divided into two partition chambers, namely a control room and a frequency conversion room. The control room is for the operator to work, and drive equipment is installed in the frequency conversion room.

[0084] A soundproof door is installed between the two chambers, which facilitates the operator to enter the frequency conversion room from the control room for maintenance and repair.

[0085] The frequency conversion room uses an integrated refrigeration air conditioner for heat dissipation, ensuring the heat dissipation requirements during equipment operation.

[0086] The control room 1 adopts a household soundproof air conditioner, ensuring the comfort of personnel during work.

[0087] The control room 1 is provided with a control room door 14 to isolate the internal and external spaces, playing a role in dust prevention, moisture prevention and waterproofing.

[0088] Compared with the existing products with the frequency conversion room and the control room installed independently, this structural design is more compact, has a higher integration level, and the housing is sealed designed, with characteristics such as dust prevention and waterproofing, which is suitable for the needs of the mixing skid for outdoor open-air work.

[0089] In a possible implementation, it further includes over-temperature protection and over-humidity protection for the frequency conversion room:

[0090] Set a temperature and humidity sensor. When the temperature or humidity is too high before operation, the frequency converter cannot be started, and the operator is reminded to turn on the dehumidification device. When the temperature or humidity is detected to be too high during operation, an alarm is issued to remind the operator to stop the machine for inspection or perform other necessary operations.

[0091] It also includes a leakage protection measure:

[0092] A zero-sequence current transformer is installed in the variable-frequency drive circuit. This transformer is installed at the front end of the frequency converter, and the signal of the transformer is connected to a leakage relay. When the detected leakage current in the circuit exceeds 30 mA, the leakage relay will send a signal and can disconnect the circuit breaker within 100 ms, ensuring the electrical safety of the frequency converter and the motor to the greatest extent.

[0093] Considering that the variable-frequency device will generate a very high high-frequency leakage current, during normal operation, this leakage current is not dangerous to the user.

[0094] The installed residual current relay can avoid the high-frequency leakage current and provide maximum insulation fault protection and ensure the continuity of operation.

[0095] At the same time, the inverse-time tripping curve of the leakage device can avoid the mis-tripping of the residual current protection system caused by abnormal zero-sequence current when the motor load suddenly increases.

[0096] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and the key points of each embodiment are the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A control room for an electric-driven continuous mixing skid of fracturing fluid, characterized in that, Including: Spaced control room and variable frequency room. The control room includes: a human-machine interface and a continuous mixing operation control system; The human-machine interface is used to display real-time data of the liquid level of the mixing tank, discharge pressure, discharge flow rate, suction flow rate, liquid addition flow rate, motor temperature, frequency converter parameters, and valve switch status, and receive one or more of the following instructions: mixing operation start instruction, mixing operation stop instruction, target liquid level of the mixing tank, target discharge pressure, target discharge flow rate, liquid addition dosage, and target sand concentration; The continuous mixing operation control system includes: an automatic liquid level control system, a discharge pressure control system, an automatic liquid addition control system, and an automatic sand concentration control system, which are used to determine the rotational speed of one or more of the suction pump, discharge pump, injection pump, liquid addition pump, sand conveying motor, and mixing motor according to one or more of the above instructions, and output rotational speed instructions. At the same time, determine the switch status and opening degree of each electric valve on the pipe manifold, and output switch instructions and opening degree instructions; The variable frequency room includes: a suction pump motor speed control system, a discharge pump motor speed control system, a liquid addition pump motor speed control system, an injection pump motor speed control system, and a sand conveying motor speed control system, which are used to perform variable frequency control on one or more of the frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor according to the rotational speed instructions output by the continuous mixing operation control system; Among them, the frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor are placed in the frequency conversion cabinets in the variable frequency room; The variable frequency room also includes: a switch cabinet and an incoming line cabinet, and the frequency conversion cabinet, switch cabinet, and incoming line cabinet are arranged adjacent to each other; The main power supply is connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor through the main circuit breaker, switch, and frequency converters connected to the suction pump, discharge pump, liquid addition pump, injection pump, and sand conveying motor respectively; the main power supply is connected to the valve electric actuator through the main circuit breaker and switch.

2. The control room of the electric drive fracturing fluid continuous mixing skid according to claim 1, characterized in that Also including: The control and auxiliary power supply module includes a 3kVA uninterruptible power supply (UPS), which is connected between the main circuit breaker and each switch through an isolation transformer; among them, the uninterruptible power supply (UPS) is installed in the console in the control room, and the isolation transformer is installed in the switch cabinet in the variable frequency room.

3. The control room of the electric drive fracturing fluid continuous mixing skid according to claim 2, wherein Also including: An integrated industrial air conditioner installed in the variable frequency room in an embedded manner.

4. The control room of the electric-driven continuous blending skid for fracturing fluid according to claim 3, wherein A climbing ladder is set outside the variable frequency room.

5. The control room of the electric-driven continuous blending skid for fracturing fluid according to claim 4, characterized in that A soundproof door is installed between the control room and the variable frequency room.

6. The control room of the electric drive continuous mixing skid for fracturing fluid according to claim 5, characterized in that The main circuit breaker is placed in the incoming line cabinet of the variable frequency room, and the switch connecting the main circuit breaker and the frequency converter is placed in the switch cabinet.

7. The control room of the electric-driven continuous blending skid for fracturing fluid according to claim 6, wherein Also including: An outdoor air conditioner unit mounted on the outer wall of the control room, and an indoor air conditioner unit mounted on the inner wall of the control room.

8. The control room of the electric drive continuous blending skid for fracturing fluid according to claim 7, wherein The control room adopts an integral frame structure. The control room and the variable frequency room are installed on the same frame beam and can be hoisted as a whole.

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