CN116961173A - Super capacitor energy storage net electric workover rig - Google Patents
Super capacitor energy storage net electric workover rig Download PDFInfo
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- CN116961173A CN116961173A CN202310843584.8A CN202310843584A CN116961173A CN 116961173 A CN116961173 A CN 116961173A CN 202310843584 A CN202310843584 A CN 202310843584A CN 116961173 A CN116961173 A CN 116961173A
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- super capacitor
- transformer
- direct current
- energy storage
- inverter
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- 239000003990 capacitor Substances 0.000 title claims abstract description 66
- 238000004146 energy storage Methods 0.000 title claims abstract description 33
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
- F03G3/087—Gravity or weight motors
- F03G3/094—Gravity or weight motors specially adapted for potential energy power storage stations; combinations of gravity or weight motors with electric motors or generators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Emergency Management (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a super-capacitor energy storage network electric workover rig, which comprises a wellhead transformer, a winch motor, a hydraulic motor and an electric control cabinet, wherein the wellhead transformer is connected with power supply; the problem of well site transformer capacity is not enough has effectively been solved, the advantage that has simple circuit, with low costs, effectively retrieve the repayment energy in the speed reduction and the process of boring down, solved the restriction that well site transformer capacity is not enough in the oil field workover rig "oil changes the electricity", solved in the current super capacitor energy storage net electricity workover rig in order to solve the problem that energy storage device and direct current busbar voltage match and have to adopt DC/DC circuit and have the circuit complicated, with high costs, inefficiency is lost greatly, be unfavorable for the problem of using and popularizing.
Description
Technical Field
The invention relates to general equipment for well repair operation in petroleum industry, in particular to an electric super-capacitor energy storage net electric workover rig for lifting underground oil pipes, oil rods and oil pumps.
Background
The oil field workover rig is specialized mechanical special equipment for maintaining an oil field underground tubular column or a well body, and is mainly used for lifting and unloading an underground oil pump, a sucker rod and an oil pipe. In the past, diesel engine power workover rig occupies the vast majority share in workover rig market, and the ubiquitous noise is big, the security is poor, the energy consumption is high, inefficiency, maintain complicacy, pollution subalternation shortcoming. In recent years, network electric workover rig starts to try to use in various large oil fields, because the operation place of the network electric workover rig is usually far away, the electric power requirement is high, the requirements on electric quality and reliability are also high, the power grid capacity in the far away place is limited, and the operation requirement of the conventional network electric workover rig cannot be met, so that the network electric workover rig of the energy storage technology is developed, a battery or a super capacitor is used as an energy storage device, the battery is used as the energy storage device, and the problems of low-temperature environment capacity attenuation, poor safety, short charge and discharge times, low feedback energy absorptivity and the like exist, so that the super capacitor is a better choice as the energy storage device.
At present, the well workover rig structure of the well in the well is composed of devices such as a winch motor, a winch frequency converter, a gearbox, a roller, a derrick, a driller room, a hydraulic station and the like, the devices are arranged on a chassis of a working vehicle when in use, the frequency converter receives a control instruction to drive the motor to run in forward and reverse directions, and the winch motor drives the gearbox and the roller to lift or descend an oil pipe to carry out well workover operation. The power supply of the network electric workover rig comes from a wellhead transformer, the capacity of the wellhead transformer is generally 30 to 80kVA, but the power of a motor of the network electric workover rig is 90 to 160kW, so the power supply capacity of the wellhead transformer cannot meet the power requirement of the network electric workover rig, in order to solve the matching problem of a super capacitor and a frequency converter voltage, the super capacitor needs to realize the power exchange of the super capacitor and the frequency converter direct current bus end through a high-power bidirectional direct current power converter, namely DC/DC, although the DC/DC can solve the matching problem, the DC/DC works in a high-frequency state to generate higher harmonics, the circuit is complex, and meanwhile, the higher harmonics can lead the super capacitor and the DC/DC to generate large heat, so that a plurality of problems of low system efficiency, high cost and large equipment size are finally caused, and the application and popularization are influenced.
Disclosure of Invention
In order to solve the problems that the existing energy storage network electric workover rig needs to use a DC/DC circuit and has complex circuit, high cost and low bidirectional conversion efficiency between a super capacitor and a busbar of a frequency converter, the invention provides the super capacitor energy storage device of the network electric workover rig, which not only can fully utilize a wellhead transformer with small capacity, but also has simple circuit structure, low cost and high working efficiency, can fully play the rated power of a motor, efficiently finish the operation and solve the defects in the prior application.
The technical scheme adopted for solving the technical problems is as follows: the super capacitor energy storage network electric workover rig comprises a wellhead transformer, a winch motor, a hydraulic motor and an electric control cabinet, wherein the power supply is connected with the wellhead transformer, the output of the wellhead transformer is connected with the electric control cabinet, a winch inverter, a hydraulic station inverter and a super capacitor energy storage device are arranged in the electric control cabinet, the winch inverter is connected with the winch motor, and the hydraulic station inverter is connected with the hydraulic station motor; the super capacitor energy storage device comprises a step-up transformer, a controllable rectifier, a super capacitor group and a power controller, wherein the step-up transformer, the controllable rectifier and the super capacitor group are sequentially connected, the input of the step-up transformer is connected with a wellhead transformer, the output of the step-up transformer is connected with the alternating current input end of the controllable rectifier, the output of the controllable rectifier is direct current, a direct current circuit is a direct current bus, the super capacitor is connected with the direct current bus, the direct current input ends of a winch inverter and a hydraulic station inverter are connected with the direct current bus, the output of the winch inverter is connected with a winch motor, and the output of the hydraulic station inverter is connected with the hydraulic station motor.
The step-up transformer is an autotransformer, the controllable rectifier is a thyristor three-phase controllable rectifying circuit, the rectification output is sent to the direct current bus, and the super capacitor bank is directly connected to the direct current bus.
The step-up transformer is an autotransformer, the controllable rectifier is an IGBT three-phase controllable rectifying circuit, the rectification output is output to the direct current bus, and the super capacitor bank is directly connected to the direct current bus.
When feedback energy exists, the feedback electric energy is fed back to the super capacitor bank through the winch inverter, the feedback energy is downwards placed according to the operation rule of the workover rig, the energy of the super capacitor bank is increased, the controllable rectifier is controlled through the power controller, the super capacitor bank is continuously charged and discharged, and the power requirement of a load is met.
The step-up transformer has the function of increasing the input voltage by 80 to 100V, so that the controllable rectifier can still ensure continuous charging according to the need when the super capacitor bank is charged to the power grid voltage, and the calculation formula of the electric quantity stored by the capacitor is adopted:wherein E (joule), C (Farad), U (volt), the relation between the stored electricity quantity and the voltage is square times, and the voltage is improved to be favorable for fully utilizing the stored electricity energy. The power controller controls the controllable rectifier to limit the input capacity of the power grid, does not exceed the allowable output capacity of the well site transformer, and simultaneously acts together with the super capacitor group to supply power to the inverter, the driving motor operates, and can enable the motor to output to the maximum rated power according to load requirements, so that the capacity provided by the well site transformer can be far greater than the capacity provided by the well site transformer, and the super capacitor group can be charged at any time in the initial power-on and operation process, namely the capacity of the well site transformer is kept as the upper limit, and the super capacitor group is charged with constant power and supplies power to the load. The power supply of the network electric workover rig can be a public power grid, and can also be a diesel generator, a natural gas generator, a photovoltaic and other power supply modes. The super-capacitor energy storage device has the functions of effectively avoiding impact of abrupt load change on a power supply, effectively absorbing feedback energy and realizing efficient utilization of potential energy in operation.
The invention has the beneficial effects that the matching problem that the power of the vehicle-mounted network electric workover rig greatly exceeds the power bearing of the wellhead transformer is solved, the potential energy of the workover rig is effectively recycled, the super capacitor power compensation scheme is adopted to meet the different working condition demands of the oilfield workover rig, the situations of different oilfield wellhead transformers are combined, the power compensation is realized on the wellhead transformers to the greatest extent, and the energy saving benefit is improved. The problem that a DC/DC circuit is required to be adopted in order to solve the problem of matching of an energy storage device and a DC bus voltage in the traditional super capacitor energy storage network electric workover rig is solved, and the problems of complex circuit, high cost, low efficiency, large loss and unfavorable application and popularization are solved.
Drawings
Fig. 1 is a schematic block diagram of the circuit of the present invention.
Fig. 2 is a circuit diagram of a supercapacitor energy storage device according to a first embodiment of the present invention.
Fig. 3 is a circuit diagram of a supercapacitor energy storage device according to a second embodiment of the present invention.
Wherein: the device comprises a wellhead transformer 1, a winch motor 4, a hydraulic station motor 9, an electric control cabinet 10, a winch inverter 11, a hydraulic station inverter 12, a super capacitor energy storage device 13, a step-up transformer 14, a controllable rectifier 15, a super capacitor bank 16, a power controller 17 and a direct current bus 18.
Detailed Description
The invention will be further described with reference to the drawings and examples.
In fig. 1, the super capacitor energy storage network electric workover rig comprises a wellhead transformer 1, a winch motor 4, a hydraulic station motor 9 and an electric control cabinet 10, wherein the wellhead transformer 1 is connected with power supply, the output of the wellhead transformer 1 is connected with the electric control cabinet 10, the electric control cabinet 10 is provided with a winch inverter 11, a hydraulic station inverter 12 and a super capacitor energy storage device 13, the winch inverter 11 is connected with the winch motor 4, and the hydraulic station inverter 12 is connected with the hydraulic station motor 9.
The supercapacitor energy storage device 13 further comprises a step-up transformer 14, a controllable rectifier 15, a supercapacitor bank 16 and a power controller 17. The step-up transformer 14, the controllable rectifier 15 and the super capacitor group 16 are sequentially connected, the input of the step-up transformer 14 is connected with the wellhead transformer 1, the output of the step-up transformer is connected with the alternating current input end of the controllable rectifier 15, the controllable rectifier 15 outputs direct current, and the direct current line is called as a direct current bus 18. The super capacitor group 16 is connected with a direct current bus 18, the direct current inputs of the winch inverter 11 and the hydraulic station inverter 12 are connected with the direct current bus 18, the output of the winch inverter 11 is connected with the winch motor 4, and the output of the hydraulic station inverter 12 is connected with the hydraulic station motor 9.
When the feedback energy exists, the feedback energy is fed back to the super capacitor bank 15 through the winch inverter 10, the feedback energy is downwards placed according to the operation rule of the workover rig, the energy of the super capacitor bank 15 is increased, the controllable rectifier 15 is controlled through the power controller 16, the super capacitor bank 15 is continuously charged and discharged, and the power requirement of a load is met.
In the embodiment of the super capacitor energy storage device shown in fig. 2, the step-up transformer 14 is an autotransformer, the controllable rectifier 15 is a thyristor three-phase controllable rectifying circuit, the rectifying output is sent to the direct current bus 18, the super capacitor group 16 is directly connected to the direct current bus 18, and the direct current bus 18 is connected to the direct current input ends of the winch inverter and the hydraulic station inverter.
In the embodiment of the super capacitor energy storage device shown in fig. 3, the step-up transformer 14 is an autotransformer, the controllable rectifier 15 is an IGBT three-phase controllable rectifying circuit, the rectification output is output to the dc bus 18, the super capacitor bank 16 is directly connected to the dc bus 18, and the dc bus 18 is connected to the dc input ends of the winch inverter and the hydraulic station inverter.
The step-up transformer has the function of increasing the input voltage by 80 to 100V, so that the controllable rectifier can still ensure continuous charging according to the need when the super capacitor bank is charged to the power grid voltage, and the calculation formula of the electric quantity stored by the capacitor is adopted:wherein E (joule), C (Farad), U (volt), the relation between the stored electricity quantity and the voltage is square times, and the voltage is improved to be favorable for fully utilizing the stored electricity energy. The power controller controls the controllable rectifier to limit the input capacity of the power grid, does not exceed the allowable output capacity of the well site transformer, and simultaneously acts together with the super capacitor group to supply power to the inverter, the driving motor operates, and can enable the motor to output to the maximum rated power according to load requirements, so that the capacity provided by the well site transformer can be far greater than the capacity provided by the well site transformer, and the super capacitor group can be charged at any time in the initial power-on and operation process, namely the capacity of the well site transformer is kept as the upper limit, and the super capacitor group is charged with constant power and supplies power to the load. Supply of network electric workover rigThe electric power source can be a public power grid, and can also be a diesel generator, a natural gas generator, a photovoltaic power supply and other power supply modes. The super-capacitor energy storage device has the functions of effectively avoiding impact of abrupt load change on a power supply, effectively absorbing feedback energy and realizing efficient utilization of potential energy in operation.
The working principle of the invention is as follows: because the output capacity provided by the wellhead transformer of the oil field is far smaller than the rated power required by the winch motor of the electric workover rig, the characteristic that the winch motor works intermittently is utilized, the rated output capacity of the wellhead transformer is used as a limit and the super capacitor is always charged until the super capacitor is full, and when the winch motor works, the super capacitor alone or the super capacitor and the wellhead transformer together provide sufficient electric energy for the winch motor connected with the winch inverter through the winch inverter, so that the winch motor can operate according to the rated power or in short time exceeding the rated power in an intermittent working mode.
Claims (4)
1. The utility model provides a super capacitor energy storage net electricity workover rig, includes well head transformer, winch motor, hydraulic motor, automatically controlled cabinet, its characterized in that: the power supply is connected with a wellhead transformer, the output of the wellhead transformer is connected with an electric control cabinet, a winch inverter, a hydraulic station inverter and a super capacitor energy storage device are installed in the electric control cabinet, wherein the winch inverter is connected with a winch motor, and the hydraulic station inverter is connected with a hydraulic station motor; the super capacitor energy storage device comprises a step-up transformer, a controllable rectifier, a super capacitor group and a power controller, wherein the step-up transformer, the controllable rectifier and the super capacitor group are sequentially connected, the input of the step-up transformer is connected with a wellhead transformer, the output of the step-up transformer is connected with the alternating current input end of the controllable rectifier, the output of the controllable rectifier is direct current, a direct current circuit is a direct current bus, the super capacitor is connected with the direct current bus, the direct current input ends of a winch inverter and a hydraulic station inverter are connected with the direct current bus, the output of the winch inverter is connected with a winch motor, and the output of the hydraulic station inverter is connected with the hydraulic station motor.
2. The supercapacitor energy storage network electric workover rig of claim 1, wherein: the step-up transformer is an autotransformer, the controllable rectifier is a thyristor three-phase controllable rectifying circuit, the rectification output is sent to the direct current bus, and the super capacitor bank is directly connected to the direct current bus.
3. The supercapacitor energy storage network electric workover rig of claim 1, wherein: the step-up transformer is an autotransformer, the controllable rectifier is an IGBT three-phase controllable rectifying circuit, the rectification output is output to the direct current bus, and the super capacitor bank is directly connected to the direct current bus.
4. The supercapacitor energy storage network electric workover rig of claim 1, wherein: when feedback energy exists, the feedback electric energy is fed back to the super capacitor bank through the winch inverter, the feedback energy is downwards placed according to the operation rule of the workover rig, the energy of the super capacitor bank is increased, the controllable rectifier is controlled through the power controller, the super capacitor bank is continuously charged and discharged, and the power requirement of a load is met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310843584.8A CN116961173A (en) | 2023-07-11 | 2023-07-11 | Super capacitor energy storage net electric workover rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310843584.8A CN116961173A (en) | 2023-07-11 | 2023-07-11 | Super capacitor energy storage net electric workover rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116961173A true CN116961173A (en) | 2023-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310843584.8A Pending CN116961173A (en) | 2023-07-11 | 2023-07-11 | Super capacitor energy storage net electric workover rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116961173A (en) |
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2023
- 2023-07-11 CN CN202310843584.8A patent/CN116961173A/en active Pending
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