CN105811518B - Lithium titanate battery energy storage for power supply system and its control method for workover rig - Google Patents
Lithium titanate battery energy storage for power supply system and its control method for workover rig Download PDFInfo
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- CN105811518B CN105811518B CN201610291934.4A CN201610291934A CN105811518B CN 105811518 B CN105811518 B CN 105811518B CN 201610291934 A CN201610291934 A CN 201610291934A CN 105811518 B CN105811518 B CN 105811518B
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- lithium titanate
- titanate battery
- power
- rectifier
- power supply
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 62
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000004146 energy storage Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 230000005611 electricity Effects 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims 3
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H02J7/022—
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of lithium titanate battery energy storage for power supply systems and its control method for workover rig, power supply system includes AC/DC rectifier, inversion unit, DC/DC two-way DC converter and lithium titanate battery, the exchange side of AC/DC rectifier is connected with power grid, the DC side of AC/DC rectifier is connected with a DC side of the DC side of inversion unit, DC/DC two-way DC converter respectively by DC bus, the exchange side of inversion unit is connected to the motor, another DC side of DC/DC two-way DC converter is connected with lithium titanate battery；Control method includes playing the charging and discharging state of drilling rod operation, hover operation and lower drilling rod Operation control lithium titanate battery according to well workover respectively.The present invention can be realized high power motor and even work overloadingly at full capacity under low capacity transformer, stablize network voltage, the effect for reducing frequent starting interference caused by power grid, can reduce equipment energy consumption, facilitates transplanting to promote the use of and use on the engineering equipments such as other liftings.
Description
Technical field
The present invention relates to oil equipment fields, are specifically related to a kind of lithium titanate battery energy storage for power supply system for workover rig
System and its control method.
Background technique
Workover rig is a kind of oil-water well workover treatment equipment that oil field is widely used, as shown in Figure 1.Currently, the biography in China
Well workover mechanomotive force of uniting uses diesel engine, and there are workover treatment high energy consumption, high noisy, three Gao Wenti such as high pollution.To solve
These problems, the net electricity workover rig of domestic research and development illustrates stronger superiority with low energy consumption, low noise, low pollution in recent years.But
Netting electric workover rig takes electricity to be limited by well site of oil field condition of power supply.
The existing well site condition of power supply in oil field is designed for electricity demanding used for oil extractor, and pumping-unit motor volume electrical power is generally not
More than 60KW.And workover rig workover treatment needs the power match of 100KW or more, is just able to satisfy normal hoisting tubing string weight and speed
Requirement, reach the hoisting power of traditional work machine and horizontal.The existing electrical machinery of active force for netting electric working rig has existing around well site
Have condition of power supply and be designed as 50KW or so, operating speed is lower than traditional work speed, influences operation timeliness；Also there is power of motor
It is designed as 100KW or more, but needs to set up high-tension transformer.Therefore, it is necessary to be stored on netting electric working rig product using battery
Energy technology meets the motor demand of 100KW or more using the power supply capacity of well site of oil field 50KW or so.
Using the workover rig of existing driving device, have the following disadvantages:
(1) existing diesel oil workover rig energy conversion efficiency is low, and the costly height of oil consumption, noise and exhaust emission are big；
(2) electric workover rig is limited by well site transformer capacity, and provisioned power of motor is smaller, and the presence of operation timeliness is not
Foot:
(3) emerging with high costs based on the net electricity workover rig that super capacitor is energy storage device, energy density is low, holds voltage
It is unevenly distributed, reliability is poor.
Summary of the invention
In view of this, the purpose of the present invention is to provide one kind can be realized high power motor under low capacity transformer
It even works overloadingly at full capacity, stablizes network voltage, reduce the effect of frequent starting interference caused by power grid, can reduce
Equipment energy consumption facilitates transplanting to promote the use of the lithium titanate battery for workover rig used on the engineering equipments such as other liftings and stores up
It can power supply system and its control method.
The present invention provides a kind of lithium titanate battery energy storage for power supply system for workover rig, including AC/DC rectifier, inversion
The exchange side of unit, DC/DC two-way DC converter and lithium titanate battery, the AC/DC rectifier is connected with power grid, described
The DC side of AC/DC rectifier by DC bus respectively with the DC side of inversion unit, DC/DC two-way DC converter one
A DC side is connected, and the exchange side of the inversion unit is connected to the motor, and another of the DC/DC two-way DC converter is straight
Stream side is connected with lithium titanate battery.
Preferably, the DC side of the inversion unit is also connected with resistance consumption branch.
Preferably, the resistance consumption branch includes the brake unit being connected in series and braking resistor, the inversion unit
DC side pass sequentially through brake unit, braking resistor ground connection.
Preferably, the DC/DC two-way DC converter is Buck/Boost topological structure.
The present invention also provides a kind of control method of lithium titanate battery energy storage for power supply system for being previously used for workover rig, steps
Include:
1) become in electric charge mode is netted by AC/DC rectifier, DC/DC bidirectional, dc before well workover plays drilling rod operation
Parallel operation is lithium titanate battery charging；
2) it rises in well workover in collaboration discharge mode after drilling rod operation starts, is electricity by AC/DC rectifier, inversion unit
Machine power supply, while lithium titanate battery is allowed to discharge through DC/DC two-way DC converter, inversion unit as motor power supply；
3) it is in floating charge mode after the completion of well workover plays drilling rod operation, is electricity by AC/DC rectifier, inversion unit
Machine power supply, while detect grid power and workover rig ancillary equipment consumption power, when grid power be more than preset threshold or
When workover rig ancillary equipment consumes power less than preset threshold, then it is by AC/DC rectifier, DC/DC two-way DC converter
Lithium titanate battery floating charge；
4) repair downhole tool operation start, motor output negative power when, then by motor output negative power by DC/DC it is bis-
It is lithium titanate battery charging to DC converter.
Preferably, the step 4) further includes the steps that detecting lithium titanate battery charged state, if lithium titanate battery is
Through fully charged, then motor output negative power is subjected to electric discharge consumption by resistance consumption branch.
Lithium titanate battery energy storage for power supply system of the present invention for workover rig has an advantage that
1, the present invention includes AC/DC rectifier, inversion unit, DC/DC two-way DC converter and lithium titanate battery, AC/
The exchange side of DC rectifier is connected with power grid, and the DC side of AC/DC rectifier is straight with inversion unit respectively by DC bus
Stream side, a DC side of DC/DC two-way DC converter are connected, and the exchange side of inversion unit is connected to the motor, and DC/DC is two-way
Another DC side of DC converter is connected with lithium titanate battery, can be realized high power motor under low capacity transformer
It even works overloadingly at full capacity, stablizes network voltage, reduce the effect of frequent starting interference caused by power grid, can reduce
Equipment energy consumption facilitates transplanting to promote the use of and uses on the engineering equipments such as other liftings.
2, the energy supplement energy device when present invention uses lithium titanate battery to play drilling rod operation as well workover, is greatly reduced
Energy storage device cost, increases the reserve power of single, improves reliability, and lithium titanate battery cryogenic property, service life,
Safety, energy density all have comprehensive advantage, are highly suitable as electricity-electricity mixed power workover rig electrical source of power.
3, the present invention includes AC/DC rectifier, inversion unit, DC/DC two-way DC converter and lithium titanate battery, is used
Modularized design facilitates transplanting to promote the use of and uses on the engineering equipments such as other liftings.
Control method of the present invention for the lithium titanate battery energy storage for power supply system of workover rig has an advantage that the present invention
The control method of lithium titanate battery energy storage for power supply system for workover rig is according to workover rig job state (removing drilling rod, hovering)
With workover rig load variations automatically control lithium titanate battery charge and discharge, this control mode, can well site transformer capacity compared with
In the case where small, power input doubles when realizing that oil pipe is promoted using the power compensation function of lithium titanate battery, when meeting operation
The requirement of effect, while well site power grid energy is made full use of, electric energy continues balanced input；When operation is transferred in well workover, lithium titanate battery
Work reaches energy saving purpose to greatest extent, to reach balanced well in charged state, regenerative electric energy when decentralization operation can be absorbed
Field electric energy reduces voltage fluctuation, the final goal of increase power factor.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the driving line chart of lithium titanate battery energy storage for power supply system of the embodiment of the present invention.
Fig. 2 is that the parameter of lithium titanate battery and other batteries compares figure in the embodiment of the present invention.
Fig. 3 is electric workover rig working power curve.
Fig. 4 is the energy flow diagram of preproduction phase in the embodiment of the present invention.
Fig. 5 is the energy flow diagram that the drilling rod stage is played in the embodiment of the present invention.
Fig. 6 is the energy flow diagram of suspension stages in the embodiment of the present invention.
Fig. 7 is the energy flow diagram in lower drilling rod stage in the embodiment of the present invention.
Description of symbols: 1, AC/DC rectifier；2, inversion unit；3, DC/DC two-way DC converter；4, lithium titanate
Battery；5, motor；6, resistance consumption branch；61, brake unit；62, braking resistor.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the lithium titanate battery energy storage for power supply system for workover rig of the present embodiment includes AC/DC rectifier
1, the exchange side of inversion unit 2, DC/DC two-way DC converter 3 and lithium titanate battery 4, AC/DC rectifier 1 is connected with power grid,
The DC side of AC/DC rectifier 1 by DC bus respectively with the DC side of inversion unit 2, DC/DC two-way DC converter 3
A DC side be connected, the exchange side of inversion unit 2 is connected with motor 5, DC/DC two-way DC converter 3 another directly
Stream side is connected with lithium titanate battery 4.
Energy supplement energy device when lithium titanate battery 4 being used to play drilling rod operation as well workover in the present embodiment, substantially
Reduce energy storage device cost, increase the reserve power of single, improve reliability, referring to fig. 2, lithium titanate battery cryogenic property,
Service life, safety, energy density all have comprehensive advantage, are highly suitable as electricity-electricity mixed power workover rig power
Power supply.
In the present embodiment, the DC side of inversion unit 2 is also connected with resistance consumption branch 6.
In the present embodiment, resistance consumption branch 6 includes the brake unit 61 being connected in series and braking resistor 62, inversion unit
2 DC side passes sequentially through brake unit 61, braking resistor 62 is grounded.
In the present embodiment, DC/DC two-way DC converter 3 is Buck/Boost topological structure.
Referring to Fig. 3, about 60s duty cycle of the workover treatment each time of workover rig, successively includes: the preproduction phase, pulls out of hole
Bar stage, suspension stages, lower drilling rod stage.For above-mentioned duty cycle, lithium titanate battery of the present embodiment for workover rig is stored up
The control method of energy power supply system, step include:
1) (preproduction phase) is in and nets electric charge mode before well workover plays drilling rod operation, passes through AC/DC rectifier 1, DC/DC
Two-way DC converter 3 is the charging of lithium titanate battery 4, referring to fig. 4；In the present embodiment, net electrical power 45kw, preproduction phase charging
15min, 4 electric power storage 10kwh of lithium titanate battery；
2) it rises after drilling rod operation starts in well workover in collaboration discharge mode, is by AC/DC rectifier 1, inversion unit 2
Motor 5 is powered, while lithium titanate battery 4 is allowed to discharge through DC/DC two-way DC converter 3, inversion unit 2 and powers for motor 5,
Referring to Fig. 5；In the present embodiment, net electrical power 45kw, the discharge power 45kw of lithium titanate battery 4 play the general power of drilling rod operation
≥90kw；
3) well workover rise drilling rod operation after the completion of (suspension stages) be in floating charge mode, by AC/DC rectifier 1,
Inversion unit 2 is the power supply of motor 5, while detecting grid power and workover rig ancillary equipment consumption power, when grid power is super
It is when preset threshold or workover rig ancillary equipment consumption power are less than preset threshold, then bis- by AC/DC rectifier 1, DC/DC
It is 4 floating charge of lithium titanate battery to DC converter 3, referring to Fig. 6；In the present embodiment, when net electrical power >=45kw or auxiliary
Equipment consumes power≤45kw, and netting electricity, individually power supply, lithium titanate battery 4 enter floating charge mode according to loading condition.
4) repair downhole tool operation start, motor 5 export negative power when, then by motor 5 output negative power pass through DC/DC
Two-way DC converter 3 is the charging of lithium titanate battery 4, referring to Fig. 7.
In the present embodiment, the power 90kw of motor 5, motor 5 is negative power output when lower drilling rod operation, i.e. effective power generation function
Rate 45kw.When continuous lower drilling rod operation, lithium titanate battery 4 is fully charged, in order to ensure effective consumption to 5 negative power of motor,
The present embodiment step 4) further includes the steps that detecting 4 charged state of lithium titanate battery, if lithium titanate battery 4 fills with electricity,
Motor 5 is then exported into negative power, electric discharge consumption is carried out by resistance consumption branch 6.In conclusion the present embodiment is according to workover rig
The charge and discharge that job state (removing drilling rod, hovering) automatically controls lithium titanate battery with workover rig load variations, thus to host
Compensation power between 45~50kw, realize high power motor under low capacity transformer at full capacity even excess load work
Make, stablize network voltage, reduces the effect of frequency converter frequent starting interference caused by power grid, and this control mode, it can
In the lesser situation of well site transformer capacity, power is defeated when realizing that oil pipe is promoted using the power compensation function of lithium titanate battery
Enter multiplication, meet the requirement of operation timeliness, while making full use of well site power grid energy, electric energy continues balanced input；Well workover decentralization
When operation, lithium titanate battery work reaches energy saving mesh to greatest extent in charged state, regenerative electric energy when decentralization operation can be absorbed
, to reach balanced well site electric energy, reduce voltage fluctuation, the final goal of increase power factor.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of control method of the lithium titanate battery energy storage for power supply system for workover rig, wherein the metatitanic acid of the workover rig
Lithium battery energy storage battery power supply system includes AC/DC rectifier (1), inversion unit (2), DC/DC two-way DC converter (3) and metatitanic acid
The exchange side of lithium battery (4), the AC/DC rectifier (1) is connected with power grid, and the DC side of the AC/DC rectifier (1) passes through
DC bus is connected with a DC side of the DC side of inversion unit (2), DC/DC two-way DC converter (3) respectively, described
The exchange side of inversion unit (2) is connected with motor (5), another DC side and titanium of the DC/DC two-way DC converter (3)
Acid lithium battery (4) is connected；It is characterized in that, the control method includes:
1) it is converted in electric charge mode is netted by AC/DC rectifier (1), DC/DC bidirectional, dc before well workover plays drilling rod operation
Device (3) is lithium titanate battery (4) charging；
2) it rises after drilling rod operation starts in well workover in collaboration discharge mode, is by AC/DC rectifier (1), inversion unit (2)
Motor (5) power supply, while lithium titanate battery (4) is allowed to discharge through DC/DC two-way DC converter (3), inversion unit (2) as electricity
Machine (5) power supply；
3) it is in floating charge mode after the completion of well workover plays drilling rod operation, is by AC/DC rectifier (1), inversion unit (2)
Motor (5) power supply, while grid power and workover rig ancillary equipment consumption power are detected, when grid power is more than preset threshold
Or workover rig ancillary equipment consumption power be less than preset threshold when, then by AC/DC rectifier (1), DC/DC bidirectional, dc become
Parallel operation (3) is lithium titanate battery (4) floating charge；
4) repair downhole tool operation start, motor (5) output negative power when, then by motor (5) output negative power pass through DC/DC
Two-way DC converter (3) is lithium titanate battery (4) charging.
2. the control method of the lithium titanate battery energy storage for power supply system according to claim 1 for workover rig, feature
It is, the step 4) further includes the steps that detecting lithium titanate battery (4) charged state, if lithium titanate battery (4) has filled
Motor (5) output negative power is then carried out electric discharge consumption by resistance consumption branch (6) by full electricity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610291934.4A CN105811518B (en) | 2016-05-05 | 2016-05-05 | Lithium titanate battery energy storage for power supply system and its control method for workover rig |
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| CN201610291934.4A CN105811518B (en) | 2016-05-05 | 2016-05-05 | Lithium titanate battery energy storage for power supply system and its control method for workover rig |
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| CN105811518B true CN105811518B (en) | 2019-03-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786486A (en) * | 2016-12-22 | 2017-05-31 | 北京群菱能源科技有限公司 | A kind of mixed power supply system and its method for oil pumper |
| CN107065521B (en) * | 2016-12-23 | 2020-05-26 | 上海致远绿色能源股份有限公司 | Self-adaptive control method of rectifier connected into oil engine |
| CN106972610B (en) * | 2017-04-12 | 2023-07-21 | 中国石油天然气集团有限公司 | Energy storage control system and control method for net electric power workover rig |
| CN107979169A (en) * | 2017-12-22 | 2018-05-01 | 珠海银隆电器有限公司 | Lithium titanate battery energy storage for power supply system and its control method for communication base station |
| US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
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