CN210745048U - 3300V oil gas field fracturing frequency conversion speed control system - Google Patents
3300V oil gas field fracturing frequency conversion speed control system Download PDFInfo
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- CN210745048U CN210745048U CN201921775431.XU CN201921775431U CN210745048U CN 210745048 U CN210745048 U CN 210745048U CN 201921775431 U CN201921775431 U CN 201921775431U CN 210745048 U CN210745048 U CN 210745048U
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Abstract
The utility model provides a 3300V oil gas field fracturing variable frequency speed control system, converter and host computer operation platform including six looks motors, the six looks motors of drive, six looks induction motor or permanent magnet synchronous motor for having two stator winding of six looks motors, the converter adopts heterogeneous motor drive converter, and it includes the rectifier unit, adopts three level contravariant topological structure's contravariant unit, the rectifier unit is connected with two contravariant units through energy storage capacitor module, and two contravariant unit's output is connected with six looks motors. The output power of the oil-gas field fracturing variable-frequency speed regulation system can reach 4 MW-5 MW, the system has the great advantages of energy conservation, environmental protection, low noise and low cost, solves the problems of high energy consumption, large pollution and high cost of the traditional diesel oil driven fracturing truck equipment, and fills the blank of the domestic high-power electrically driven oil-gas field fracturing variable-frequency speed regulation system.
Description
Technical Field
The utility model relates to a variable frequency speed control system especially relates to a 3300V oil gas field fracturing variable frequency speed control system.
Background
Fracturing is one of the important means for improving the recovery ratio of non-renewable energy resources such as oil, gas and the like at present, is widely applied to the yield increase of oil and gas wells and the injection increase of water injection wells, and obviously becomes a main means for transforming low-permeability oil and gas reservoirs, developing deep oil and gas reservoirs, shale gas and shale oil.
The fracturing pump is an actuating mechanism in the fracturing operation process and is a direct fracturing power source, the operation of the fracturing pump is not supported by the driving of external power equipment, so that the technical performance of the driving equipment of the fracturing pump is high and low, and the success or failure and the transformation effect of fracturing construction are directly related. The fracturing pump driving equipment on the market at present is mainly a high-power diesel fracturing truck which comprises a fracturing truck group, a diesel engine, a hydraulic torque converter and a variable box speed. Since the basic industry such as automobile manufacturing is developed abroad, particularly in the United states, the technology is advanced, high-power high-speed diesel locomotives with heavy loads such as Kelvis, the Wanguo and Mark can be directly selected as fracturing trucks, and compared with the driving technology of the domestic fracturing trucks, the fracturing trucks in China are still in the starting stage, so that the domestic fracturing trucks mainly depend on import and are expensive, and the diesel fracturing trucks can consume a large amount of fuel and generate harmful gas in the long-time fracturing operation process, so that the problems of high fracturing cost, environment damage and high noise exist.
Under the national large background of encouraging energy conservation and emission reduction and environmental protection, the application of a diesel fracturing truck to an electrically-driven fracturing variable-frequency speed regulation system is imperative in the field of oil-gas field fracturing operation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a 3300V oil gas field fracturing frequency conversion speed governing system, based on the problem that above market opportunity exists with traditional diesel oil fracturing car drive equipment, especially there is can not electrodeless speed governing to the traditional diesel oil fracturing car drive equipment in present oil gas field fracturing field, it is with high costs, the noise, pollute greatly, transfinite and hydraulic oil pollution scheduling problem, through one based on 24 pulse rectification, 3 level electrical topology structure, 2 independent contravariant output circuit cooperation six phase induction motor or permanent magnet synchronous motor that have sharing direct current generating line realize "3300V oil gas field fracturing frequency conversion speed governing system". The variable frequency speed control system driving fracturing pump has the advantages of stepless speed control, output power of 4 MW-5 MW, high efficiency, energy conservation, environmental protection, intelligence, low noise and the like, and the technical scheme is as follows:
the utility model provides a 3300V oil gas field fracturing variable frequency speed control system, includes six looks motors, drives six looks motors's converter and host computer operation platform, six looks motors are six looks induction motor or permanent magnet synchronous motor for having two stator windings, the converter adopts heterogeneous motor drive converter, and it includes the rectifier unit, adopts three level contravariant topological structure's contravariant unit, the rectifier unit is connected with two contravariant units through energy storage capacitor module, and two contravariant unit's output is connected with six looks motors.
The upper computer operation platform is communicated with the frequency converter through the Ethernet, and can perform online control and monitoring on the running and working states of the six-phase motor.
The double-stator winding equally divides a 60-degree phase belt winding of a three-phase induction motor or a permanent magnet synchronous motor into two phase belts to obtain two groups of symmetrical three-phase windings with 30-degree electrical angle difference and midpoint isolation.
The six-phase induction motor or the permanent magnet synchronous motor is provided with two motor output shafts, and can drive two load devices to operate simultaneously.
The input power of the frequency converter is a three-phase AC power supply with 830-850V AC with the difference of 15 degrees in four phases, namely a frequency converter rectifying unit is 24-pulse rectifying.
The frequency converter adopts a six-phase motor driving frequency converter, is provided with two independent inversion units as an output loop, and the two independent inversion units adopt a common direct current bus structure and are used for driving a three-phase motor or a six-phase motor.
And the inverter unit of the frequency converter outputs the signals through the vacuum contactor.
The energy storage capacitor module of the frequency converter is used as a power main circuit device and adopts a cable-free laminated busbar structure.
The utility model has the advantages that:
1. the 3300V oil and gas field fracturing frequency conversion speed control system utilizes converter and motor to drive the fracturing pump through the electric drive mode, has solved traditional diesel oil power fracturing truck and has had the problem that the energy consumption is high, the pollution is big, with high costs, has can stepless speed regulation, efficient, environmental protection, advantage with low costs.
2. The frequency conversion part in the 3300V oil and gas field fracturing frequency conversion speed regulation system adopts a 24-pulse rectification and three-level inversion electrical topological structure, the 24-pulse rectification has the advantages of small direct current pulsation and capability of eliminating high-order harmonics such as 5th, 7th, 11th, 13th, 17th and 19th in power supply current, and the three-level inversion can enable the output current of an inverter to be smoother and can obviously reduce the influence on harmonic voltage and instantaneous impulse voltage of a motor.
3. A power main circuit unit of a variable frequency part in the 3300V oil and gas field fracturing variable frequency speed control system adopts a cable-free detachable laminated busbar structure to tightly connect an energy storage capacitor module and a power inverter module together, so that the space is compact, and the integral volume of a frequency converter is reduced. Compared with the traditional wiring connection mode, the power main circuit unit adopts a cable-free laminated busbar structure, so that the impedance of the power main circuit unit and the distributed inductance in a line can be effectively reduced, and the turn-off peak voltage of the IGBT is effectively reduced.
4. A frequency conversion part in the 3300V oil and gas field fracturing frequency conversion speed regulation system is provided with 2 inversion output units sharing a direct current bus, the two inversion output units can be regarded as a six-phase inversion output unit, and stepless speed regulation control of a three-phase motor or a six-phase motor can be achieved. Particularly, when a six-phase motor is driven, due to the phase number redundancy, when one or more phases of the six-phase motor or the six-phase inverter break down and quit working, the system can adjust a control strategy, the system can still stably run after the load is reduced, and the continuous operation of a production task is ensured.
5. The operating platform of the upper computer in the 3300V oil and gas field fracturing variable frequency speed control system is a man-machine visual operating platform, and the visual operating platform is communicated with a frequency converter through an Ethernet, so that the frequency converter can be remotely monitored and controlled on line in real time to drive states of a motor and a fracturing pump, and safe and reliable performance of fracturing operation is guaranteed.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the 3300V oil and gas field fracturing variable-frequency speed regulation system;
FIG. 2 is a schematic diagram of the frequency converter;
fig. 3 is a schematic view of the six-phase motor structure;
FIG. 4 is a schematic diagram of the six-phase motor stator winding structure;
fig. 5 is a schematic diagram of the topology of the frequency converter.
Detailed Description
The utility model provides a 3300V oil gas field fracturing variable frequency speed control system, as shown in fig. 1, including host computer operation platform 1, two independent output circuit converters 2 and six looks motors 3, communication between host computer operation platform and 2 converters adopts ethernet line 4, is connected with power cable 5 between 2 converters and the six looks motors. The upper computer operating platform 1 is communicated with the frequency converter 2 through the Ethernet, and can perform online control and monitoring on the operation and working state of the motor on the operating platform.
As shown in fig. 2, the frequency converter 2 includes a rectifying unit 6, a first inverting unit 7 and a second inverting unit 8 which are connected in sequence, the rectifying unit 6 includes a vacuum input contactor 9 and a high-voltage charging assembly 10, the input end of the vacuum input contactor 9 (the number of the vacuum input contactor is 4) is connected with an AC power supply of 830-850V with a difference of 15 ° between four phases, the output end of the vacuum input contactor 9 is connected with a rectifying module, the input end of the high-voltage charging assembly 10 is connected with a circuit breaker which controls to be connected with a 380VAC power supply, and the output end of the high-voltage charging assembly is connected with the positive electrode and the negative electrode of a dc bus of the frequency converter 2 after passing through a.
The first inverter unit 7 comprises a main control unit 11, an energy storage filter capacitor 14, a hall current sensor 15 for detecting output current, an output reactor 16, a vacuum output contactor 17 and a bracket 12 for mounting the main control unit 11, wherein the main control unit 11 is mounted on the bracket 12 and is connected with a PLC (programmable logic controller), a temperature sensor, the hall current sensor, an encoder and the like;
and a Hall current sensor 15 is installed at the lower end of the energy storage filter capacitor 14 and is used for detecting the output current of the inverter loop where the Hall current sensor is located.
The output loops of the two inversion units of the frequency converter 2 are designed to be output through the vacuum contactor, and when the driving target permanent magnet synchronous motor is stopped at a high speed, the vacuum contactor of the output loops is switched off, so that overvoltage damage to frequency conversion equipment caused by continuous back-flushing electricity of the permanent magnet motor can be effectively prevented. The output reactor 16 is respectively installed on the cavity bases of the first inversion unit and the second inversion unit, the input end of the reactor 16 of the first inversion unit is connected with a three-phase alternating current power supply inverted by the IGBT of the inversion unit, the output end of the reactor 16 is connected with the input end of the output vacuum contactor 17 of the first inversion unit, and the vacuum output contactor 17 is respectively installed on the side wall of the lower right corner of the cavity of the first inversion unit and the cavity of the second inversion unit. The devices of the first inverter unit and the second inverter unit are symmetrically installed, which is not described herein. (the output reactor can compensate the influence of the long line distributed capacitance, can restrain the output harmonic current, improve the output high-frequency impedance, effectively restrain dv/dt, reduce the high-frequency leakage current, protect the frequency converter and reduce the noise of the equipment.)
The distribution devices in the second inversion unit 8 are consistent with those in the first inversion unit 7, the energy storage filter capacitors of the first inversion unit 7 and the second inversion unit 8 are connected to the same laminated busbar 13, and the laminated busbar 13 adopts a common direct-current bus. Therefore, the impedance of the laminated busbar and the distributed inductance in a line can be effectively reduced, the IGBT turn-off spike voltage is effectively reduced, the laminated busbar can be integrally detached and installed, the quality control of the busbar is facilitated, and the assembly and after-sale service are facilitated. Further improving the working stability and the space utilization rate of the equipment and reducing the manufacturing cost of the equipment.
As shown in fig. 3, the six-phase motor 3 is a six-phase induction motor or a permanent magnet synchronous motor with double stator windings, and the six-phase motor 3 has two motor output shafts, which can drive two fracturing pumps to operate simultaneously, and includes a power supply junction box 18 of the six-phase motor, a rear bearing 19 of the six-phase motor, a front bearing 20 of the six-phase motor, and a heat dissipation window 21 of the six-phase motor. A heat radiation window 21 is arranged on the shell of the six-phase motor. The power supply junction box 18 comprises a first junction port and a second junction port, the first junction port is provided with U1, V1 and W1 and is connected with an output vacuum contactor of the first inversion unit 7 through a part of cable lines of the power cable 5, the second junction port is provided with U2, V2 and W2 and is connected with an output vacuum contactor of the second inversion unit 8 through a part of cable lines of the power cable 5.
Particularly, when the frequency converter 2 drives the six-phase motor 3, due to the phase number redundancy, when one or more phases of the multi-phase motor or the multi-phase inverter break down and quit working, the system can adjust the control strategy, the system can still stably operate after the load is reduced, and the continuous operation of production tasks is ensured.
The bearing of the six-phase motor extends forwards to form a front bearing 20, extends backwards to form a rear bearing 19, the front bearing 20 is used for connecting and driving a fracturing pump, and the rear bearing 19 is used for connecting and driving another fracturing pump.
As shown in fig. 4, the structure diagram of the stator winding of the six-phase motor is that the stator winding structure of the six-phase motor equally divides a 60-degree phase band winding of a three-phase asynchronous or synchronous motor into two phase bands according to a star connection to obtain two groups of symmetrical three-phase windings with an electrical angle difference of 30 degrees and separated by a midpoint, which are respectively a1, c1, e1, b1, d1 and f 1.
Specifically, in relation to a1, c1, e1, b1, d1, f1, U1, V1, W1, U2, V2, and W2, the power supply junction box 18 includes a first junction port and a second junction port, the U1, V1, and W1 of the first junction port are respectively connected to a1, c1, and e1 inside the motor, the U2, V2, and W2 of the second junction port are respectively connected to b1, d1, and f1 inside the motor, (and how does the six-phase motor operate when the six-phase motor is a permanent magnet synchronous motor?) the six-phase asynchronous motor is consistent with the operating principle of the six-phase permanent magnet synchronous motor, except that the six-phase asynchronous motor is different from the six-phase permanent magnet synchronous motor in rotor structure, the rotor of the six-phase motor is in a squirrel-cage structure, and the stator coils of the asynchronous motor need to rotate, the permanent magnet is embedded in the rotor of the permanent magnet synchronous motor, the rotor is magnetic, and excitation of a stator coil is not needed.
As shown in fig. 5, the main circuit topology of the frequency converter is schematically illustrated, and the electrical topology includes 24 pulse wave rectification units formed by cascading four three-phase full-bridge rectifiers and 2 independent inversion units sharing a dc bus, and an energy storage capacitor module is connected between the rectification units and the inversion units. By combining the rectifying unit 6, the first inverting unit 7 and the second inverting unit 8, it can be seen that the rectifying unit 6 corresponds to one rectifying unit, the energy storage filter capacitors of the first inverting unit 7 and the second inverting unit 8 correspond to the energy storage capacitor module, the energy storage capacitor module is formed by connecting a plurality of (four in the embodiment) discrete power capacitor units in parallel, and the power capacitor units adopt the energy storage filter capacitors.
Other components of the first inverter unit 7 and the second inverter unit 8 correspond to the two inverter units, respectively. The utility model discloses a four phase positions are each poor 15 830 ~ 850V AC alternating current power supply, and the input of conventional output 3300V converter is two way 1700 ~ 1900V AC, and the twelve pulse rectification or the input that the phase angle differed 30 are 3300V AC all the way, six pulse rectification that the phase angle differed 60. Firstly, a 24-pulse rectification unit is formed in a manner of cascading four three-phase full-bridge rectifiers, an energy storage capacitor module is connected between the rectification unit and an inversion unit, and two independent inversion units are hung on the same direct-current bus by adopting a three-level inversion electrical topological structure.
The contravariant unit of converter adopts three level topological structure, and the three level topology of contravariant part is the electric topological structure of conventional high-voltage inverter, but will have 24 pulse rectification and combine the high-power three level topological structure of high pressure, and output can reach 4MW ~ 5 MW's converter, uses in the oil gas field fracturing field, at home and abroad belongs to the first platform to compare in two level topological structure, adopt three level topological structure can make inverter output current more level smooth, can show to reduce harmonic voltage and the impact voltage in the twinkling of an eye influence the motor.
Claims (8)
1. The utility model provides a 3300V oil and gas field fracturing frequency conversion speed control system which characterized in that: the six-phase motor is a six-phase induction motor or a permanent magnet synchronous motor with double stator windings, the frequency converter adopts a multi-phase motor driving frequency converter and comprises a rectifying unit and an inverting unit adopting a three-level inverting topological structure, the rectifying unit is connected with the two inverting units through an energy storage capacitor module, and the output ends of the two inverting units are connected with the six-phase motor.
2. The 3300V field fracturing variable frequency speed control system of claim 1, wherein: the upper computer operation platform is communicated with the frequency converter through the Ethernet, and can perform online control and monitoring on the running and working states of the six-phase motor.
3. The 3300V field fracturing variable frequency speed control system of claim 1, wherein: the double-stator winding equally divides a 60-degree phase belt winding of a three-phase induction motor or a permanent magnet synchronous motor into two phase belts to obtain two groups of symmetrical three-phase windings with 30-degree electrical angle difference and midpoint isolation.
4. The 3300V field fracturing variable frequency speed control system of claim 1, wherein: the six-phase induction motor or the permanent magnet synchronous motor is provided with two motor output shafts, and can drive two load devices to operate simultaneously.
5. The 3300V field fracturing variable frequency speed control system of claim 1, wherein: the input power of the frequency converter is a three-phase AC power supply with 830-850V AC with the difference of 15 degrees in four phases, namely a frequency converter rectifying unit is 24-pulse rectifying.
6. The 3300V field fracturing variable frequency speed control system of claim 1, wherein: the frequency converter adopts a six-phase motor driving frequency converter, is provided with two independent inversion units as an output loop, and the two independent inversion units adopt a common direct current bus structure and are used for driving a three-phase motor or a six-phase motor.
7. The 3300V field fracturing variable frequency speed control system of claim 1, wherein: and the inverter unit of the frequency converter outputs the signals through the vacuum contactor.
8. The 3300V field fracturing variable frequency speed control system of claim 1, wherein: the energy storage capacitor module of the frequency converter is used as a power main circuit device and adopts a cable-free laminated busbar structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921775431.XU CN210745048U (en) | 2019-10-22 | 2019-10-22 | 3300V oil gas field fracturing frequency conversion speed control system |
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| CN201921775431.XU CN210745048U (en) | 2019-10-22 | 2019-10-22 | 3300V oil gas field fracturing frequency conversion speed control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022110379A1 (en) * | 2020-11-24 | 2022-06-02 | 烟台杰瑞石油装备技术有限公司 | Fracturing system |
| US11662384B2 (en) | 2020-11-13 | 2023-05-30 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Motor malfunction monitoring device, drive motor system and motor malfunction monitoring method |
| US11680474B2 (en) | 2019-06-13 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US11680472B2 (en) | 2020-11-24 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing system |
| US11746636B2 (en) | 2019-10-30 | 2023-09-05 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
-
2019
- 2019-10-22 CN CN201921775431.XU patent/CN210745048U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11680474B2 (en) | 2019-06-13 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US11746636B2 (en) | 2019-10-30 | 2023-09-05 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing apparatus and control method thereof, fracturing system |
| US11662384B2 (en) | 2020-11-13 | 2023-05-30 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Motor malfunction monitoring device, drive motor system and motor malfunction monitoring method |
| WO2022110379A1 (en) * | 2020-11-24 | 2022-06-02 | 烟台杰瑞石油装备技术有限公司 | Fracturing system |
| US11680472B2 (en) | 2020-11-24 | 2023-06-20 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing system |
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