CN209016721U - A kind of Ultracapacitor Energy Storage based on conventional pumping unit - Google Patents
A kind of Ultracapacitor Energy Storage based on conventional pumping unit Download PDFInfo
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- CN209016721U CN209016721U CN201822033184.8U CN201822033184U CN209016721U CN 209016721 U CN209016721 U CN 209016721U CN 201822033184 U CN201822033184 U CN 201822033184U CN 209016721 U CN209016721 U CN 209016721U
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Abstract
A kind of Ultracapacitor Energy Storage based on conventional pumping unit belongs to oil-field oil pumper energy conservation energy storage field, it is characterised in that: including motor, frequency converter, two-way DC/DC converter, super capacitor module and remote terminal RTU；The motor is electrically connected with frequency converter；The super-capacitor module is electrically connected through the bus of two-way DC/DC converter and frequency converter；The two-way DC/DC converter is connected through remote terminal RTU with monitoring module.Pumping unit makes motor enter regenerative power generation state during down stroke puts bar, in the inverter module feedback to DC bus that this partial regeneration energy passes through frequency converter, pass through super-capacitor module absorption and regeneration energy and storing prevents it from generating harmonic pollution to power grid, in pumping-unit motor motoring condition, super-capacitor module releases the energy of absorption, motoring condition peak power, balance power grid output are provided.
Description
Technical field
The utility model belongs to oil-field oil pumper energy conservation energy storage field more particularly to a kind of based on the super of conventional pumping unit
Energy-storing device with capacitor.
Background technique
Pumping unit is developed so far, and has several hundred kinds of forms, and the pumping unit that China applies at this stage is mainly beam type oil pumping
Machine, it is simple and practical in structure, operational reliability is strong, but self structure is than the originals such as cumbersome, energy consumption is excessively high, counterbalance effect is poor
Cause causes when system effectiveness is too low, motor does work there are electric phenomenon, generally existing ＂ low load with strong power ＂ and ＂ up-down stroke not
The problems such as balancing ＂.To improve pumping production system effectiveness, guarantee the efficient operation of rod-pumped well, oil field largely uses frequency conversion
Speed regulation device improves motor power factor, optimizes swabbing parameter, reduces electric energy loss.When the position that motor is driven can be born
When carrying decentralization, motor will likely be in regenerative power generation state；Or when motor slows down from high speed to low speed (containing parking), frequency
The possible anticlimax of rate, but because of the machinery inertial of motor, motor is also possible to stored by regenerative power generation state, transmission system
Mechanical energy is converted into electric energy through motor, is transmitted back in the DC loop of frequency converter by six freewheeling diodes of inverter.
Inverter at this time is in rectification state.At this moment, if not taking the measure of consumption energy in frequency converter, this portion of energy will be led
The voltage of the energy-storage capacitor of intermediate loop is caused to rise, this portion of energy may bring damage to frequency converter.To regeneration energy
There are two types of most common processing modes: one is be dissipated in " braking resistor " being artificially arranged in DC loop；Another kind is
It is allowed to feed back to power grid, harmonic pollution can be caused to power grid.Therefore how to handle this portion of energy is the key that energy saving and efficiency increasing.
The processing of related pumping unit regeneration energy has been achieved for some achievements, utility model patent in recent years
200920098739.5 disclosing energy-storage pumping unit power saving device with super capacitor, propose super-capacitor module is automatically controlled through charge and discharge
Charge and discharge process is completed on the DC bus of unit access frequency converter processed.When the patent does not consider practical application, direct current is female
Line side voltage is higher, and being directly connected with super capacitor, it is excessively high to will cause transient current, is easy in long-time use process to super
Capacitor damages, and shortens the working life.
Summary of the invention
The utility model aims to solve the problem that the above problem, provides a kind of ultracapacitor energy storage dress based on conventional pumping unit
It sets.
Ultracapacitor Energy Storage described in the utility model based on conventional pumping unit, including it is motor, frequency converter, double
To DC/DC converter, super capacitor module and remote terminal RTU；The motor is electrically connected with frequency converter；It is described super
Capacitance module is electrically connected through the bus of two-way DC/DC converter and frequency converter；The two-way DC/DC converter is through remote terminal
RTU is connected with monitoring module.High-pressure side and low-pressure side parameter are read in real time by remote terminal RTU, and excess temperature overheat can alarm.
And the two-way DC/DC converter working condition of cutting is remotely controlled by monitoring module in the event of an emergency.
Ultracapacitor Energy Storage described in the utility model based on conventional pumping unit, it is characterised in that: described two-way
DC/DC converter includes two-way DC/DC conversion module, acquisition module, signal conditioning module, controller and isolation drive module；
The acquisition module is provided with the first acquisition module and the second acquisition module；The signal conditioning module through the first acquisition module with
The bus of aforementioned frequency converter is electrically connected；The signal conditioning module is mutually electric with aforementioned super-capacitor module through the second acquisition module
Connection；The signal conditioning module, controller, isolation drive module and two-way DC/DC conversion module are sequentially connected electrically；It is described to adopt
Collecting module includes voltage acquisition module and current acquisition module.Supercapacitor group is accessed to through two-way DC/DC conversion module
The DC bus end of frequency converter, respectively by the first acquisition module and the second acquisition module to DC bus side, supercapacitor side
Voltage and current signal sampling after be sent into signal conditioning module, after conditioning after be converted into conversion AD unit acceptable voltage letter
Number, it is received by it and sends controller to and handled, after controller runs specific system control, output PWM letter
Number isolation drive module is given, signal is carried out by isolation drive module to carry out on-off to the IGBT in conversion module after isolation amplification
Control.
Ultracapacitor Energy Storage described in the utility model based on conventional pumping unit, the two-way DC/DC changing pattern
Block is bi-directional half bridge type topological structure.Bi-directional half bridge type DC/DC converter voltage balancing technique is mature, and monomer capacitor is series-parallel
At supercapacitor group, voltage rating is up to tens to several hectovolts, and high reliablity, efficiency of transmission is preferably and cost is relatively low.
Ultracapacitor Energy Storage described in the utility model based on conventional pumping unit, the controller use STM32
Controller.
Ultracapacitor Energy Storage described in the utility model based on conventional pumping unit, the voltage acquisition module use
TBV5/25A Hall voltage sensor；The current acquisition module uses HCN50LX type Hall current sensor.
Ultracapacitor Energy Storage described in the utility model based on conventional pumping unit, including it is motor, frequency converter, double
To DC/DC converter, super-capacitor module and remote terminal RTU.Three phase network is super by transducer drive electric motor operation
Capacitance module connects through two-way DC/DC converter with the DC bus of frequency converter, remote terminal RTU and two-way DC/DC converter
Connect, read the acquisition data of two-way DC/DC converter and communicated with remote monitoring module, grasps the work of energy-storage system at any time
Situation.Pumping unit makes motor enter regenerative power generation state during down stroke puts bar, this partial regeneration energy passes through frequency converter
Inverter module feedback prevent it from generating to power grid on DC bus, passing through super-capacitor module absorption and regeneration energy and store
Harmonic pollution, in pumping-unit motor motoring condition, super-capacitor module releases the energy of absorption, provides motoring condition spike
Power, balance power grid output.
Detailed description of the invention
Fig. 1 is the structure principle chart of energy storage device described in the utility model；
Fig. 2 is two-way DC/DC conversion module topology diagram described in the utility model；
Fig. 3 is the control structure figure of energy storage device described in the utility model；
Fig. 4 is the control strategy block diagram of energy storage device described in the utility model；
Fig. 5 is the current signal conditioning module circuit diagram of energy storage device described in the utility model；
Fig. 6 is the voltage signal conditioning module circuit diagram of energy storage device described in the utility model.
Specific embodiment
Ultracapacitor energy storage dress to described in the utility model based on conventional pumping unit with reference to the accompanying drawings and embodiments
It sets and is described in detail.
Ultracapacitor Energy Storage described in the utility model based on conventional pumping unit, as shown in Figure 1, including electronic
Machine, frequency converter, two-way DC/DC converter, super capacitor module and remote terminal RTU；The motor M output end and oil pumping
Machine is connected；The motor input terminals are electrically connected with frequency converter；The super-capacitor module through two-way DC/DC converter with
The bus of frequency converter is electrically connected；The two-way DC/DC converter is connected through remote terminal RTU with monitoring module.In this reality
Applying monitoring module in example is the control terminal for being set to monitoring center；Filter capacitor is connected in parallel on rectification power circuit output
End, to reduce AC ripple ripple coefficient, smooth direct current output；Braking resistor is to consume extra energy.
As shown in figure 3, the two-way DC/DC converter includes two-way DC/DC conversion module, acquisition module, signal condition
Module, controller and isolation drive module；Two-way DC/DC variation module is bi-directional half bridge type topological structure as shown in Figure 2.When straight
When flowing busbar voltage less than setting minimum value, converter is boost converter at this time, super capacitor side is discharged inverse to be supplied to
Become one steady dc voltage of device, and reduces current ripples.When DC bus-bar voltage be greater than setting maximum value when, at this time for
Buck converter charges to super capacitor, reduces the DC voltage of inverter side.In bi-directional half bridge converter course of normal operation
In, in two power devices of bi-directional half bridge converter, only one the switch work of each moment.When work is in boost mode
When, then Q1 ends for power switch Q2 work；When work is in decompression mode, then Q2 ends for power switch Q1 work.In order to guarantee
Converter smoothly replaces between two working conditions, and the driving signal of two power switch must assure that be complete switched off at one
Afterwards, another could be connected.The acquisition module is provided with the first acquisition module and the second acquisition module；The signal condition mould
Block is electrically connected through the bus of the first acquisition module and aforementioned frequency converter；The signal conditioning module is through the second acquisition module with before
Super-capacitor module is stated to be electrically connected；The signal conditioning module, controller, isolation drive module and two-way DC/DC convert mould
Block is sequentially connected electrically；The acquisition module includes voltage acquisition module and current acquisition module.
The DC bus end that supercapacitor group is accessed to frequency converter through two-way DC/DC conversion module, respectively by first
Acquisition module and the second acquisition module are to feeding signal tune after the voltage and current signal sampling of DC bus side, supercapacitor side
Module is managed, signal conditioning module includes current signal conditioning module and voltage signal as shown in FIG. 6 conditioning mould as shown in Figure 5
Block, after conditioning after be converted into the conversion acceptable voltage signal of AD unit, received by it and send controller to and carried out
Reason, after controller runs specific system control, output pwm signal gives isolation drive module, by isolation drive module to letter
On-off control is carried out to the IGBT in conversion module after number carrying out isolation amplification.
Pumping unit types different in actual use needs to be arranged different parameters, this implementation is with ten type pumping units
Example, frequency changer direct current bus voltage is about 550v, designs super capacitor voltage rating 450v, and pumping-unit motor rated power is
15kw.First to IGBT type selecting, consider that two parameter collector emitter voltages (voltage rating) and collector current are (specified
Electric current), to consider that transient voltage is breakdown to prevent in selection, so 2 when voltage rating generally takes normal working voltage ~
3 times；In IGBT work, peak point current necessarily is in safe current range, so the rated current of IGBT generally takes peak point current
2 times.Comprehensively consider the influence of above-mentioned factor and switching frequency, chooses the IGBT module of SEMIKRON company
SKM300GB128D, voltage rating 1200V, rated current 370A.
The controller need to meet requirement of the system for switching frequency, ADC resolution ratio and sample rate, PWM resolution ratio: defeated
When ripple is identical out, switching frequency is higher, and filter capacitor and inductance are smaller, can reduce volume and weight but increase switching loss.
According to sampling thheorem, when only sample rate is twice of signal highest frequency or more, digital signal can be complete after just can guarantee sampling
Retain the information of original analog signal, while in order to guarantee that the output of system is stablized, the minimum resolution of ADC should be less than converter
Allow output voltage ripple.For PWM resolution ratio, it is higher than output voltage ripple requirement.Meaning method is chosen according to requirements above
The STM32 microcontroller of semiconductor company's production, model STM32F103RBT6, it is based on ARM Cortex-M3 kernel, most
High 72MHz working frequency.
Voltage sample module and current sampling module should meet corresponding voltage and current range, and specific type selecting is current sense
Device selects HCN50LX type Hall current sensor, and electric current input range is+50A, corresponding voltage output are+4V.Voltage sensor
Device selects TBV5/25A Hall voltage sensor, turn ratio 5000:1000.
The isolation drive module is made of driving chip KA962F and AC-DC module power supply PA202.Since controller is defeated
Signal amplitude is up to 3.3V out, and driving power itself is limited, puts so driving circuit is needed to carry out isolation to control signal
Greatly and it is conveyed to IGBT.PA202 mainly provides two-way 24V direct current output, and peak power output 6KW meets in this system
IGBT driving voltage, power demand.KA962F chip is the modified of M57962 thick film driving circuit, and chip interior has protection
Mechanism, and realize the Phototube Coupling of input and output, and be internally provided with negative pressure distributor, effectively reduce peripheral electric appliance member
The use of part keeps circuit more succinct.
To make to be applicable in requirement of actual working condition in pumping unit application, according to the super electricity as shown in Figure 4 based on conventional pumping unit
The control strategy of container energy storage device, program judges system mode, system according to the voltage and current value of sampling after ADC sampling
When starting, when detecting DC bus side voltage UdcLower than lower limit value UdcminWhen, detect super capacitor end voltage Usc, work as capacitor
Voltage UscIt is not below lower limit value UscminWhen, then it is powered jointly by power grid and super capacitor；As capacitance voltage UscLower than lower limit value
UscminWhen, then it is individually powered by power grid.When detecting DC bus side voltage UdcHigher than upper limit value UdcmaxWhen, detect super electricity
Hold end voltage Usc, as capacitance voltage UscNot higher than upper limit value UscmaxWhen, then feedback electric energy all charges to super capacitor；Work as electricity
Hold voltage UscHigher than upper limit value UscmaxWhen, super capacitor stops receiving feedback electric energy.Super electricity is not only increased by this strategy
Hold capacity usage ratio, also adds the service life of super capacitor.
Claims (5)
1. a kind of Ultracapacitor Energy Storage based on conventional pumping unit, it is characterised in that: including motor, frequency converter, double
To DC/DC converter, super capacitor module and remote terminal RTU；The motor is electrically connected with frequency converter；It is described super
Capacitance module is electrically connected through the bus of two-way DC/DC converter and frequency converter；The two-way DC/DC converter is through remote terminal
RTU is connected with monitoring module.
2. according to claim 1 based on the Ultracapacitor Energy Storage of conventional pumping unit, it is characterised in that: described two-way
DC/DC converter includes two-way DC/DC conversion module, acquisition module, signal conditioning module, controller and isolation drive module；
The acquisition module is provided with the first acquisition module and the second acquisition module；The signal conditioning module through the first acquisition module with
The bus of aforementioned frequency converter is electrically connected；The signal conditioning module is mutually electric with aforementioned super-capacitor module through the second acquisition module
Connection；The signal conditioning module, controller, isolation drive module and two-way DC/DC converter are sequentially connected electrically；The acquisition
Module includes voltage acquisition module and current acquisition module.
3. according to claim 2 based on the Ultracapacitor Energy Storage of conventional pumping unit, it is characterised in that: described two-way
It is bi-directional half bridge type topological structure that DC/DC, which changes module,.
4. according to claim 3 based on the Ultracapacitor Energy Storage of conventional pumping unit, it is characterised in that: the control
Device uses STM32 controller.
5. according to claim 4 based on the Ultracapacitor Energy Storage of conventional pumping unit, it is characterised in that: the voltage
Acquisition module uses TBV5/25A Hall voltage sensor；The current acquisition module is sensed using HCN50LX type Hall current
Device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822033184.8U CN209016721U (en) | 2018-12-05 | 2018-12-05 | A kind of Ultracapacitor Energy Storage based on conventional pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822033184.8U CN209016721U (en) | 2018-12-05 | 2018-12-05 | A kind of Ultracapacitor Energy Storage based on conventional pumping unit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112422016A (en) * | 2019-08-22 | 2021-02-26 | 深圳市正弦电气股份有限公司 | Self-adaptive intelligent energy-saving control method and control system for oil pumping unit in oil field |
| CN114156862A (en) * | 2021-12-06 | 2022-03-08 | 山东爱特机电技术有限责任公司 | Optical storage direct current micro-grid technology of oil pumping unit |
| CN114665510A (en) * | 2022-05-27 | 2022-06-24 | 西安海联石化科技有限公司 | Photoelectric energy source direct current power supply pumping unit well group energy-saving control system |
| CN115189594A (en) * | 2022-06-21 | 2022-10-14 | 湖北文理学院 | Motor soft start control system and device |
| CN116632877A (en) * | 2023-07-19 | 2023-08-22 | 深圳市清研储能技术有限公司 | Power supply device and power supply method of oil field pumping unit |
| DE102022129517A1 (en) * | 2022-11-08 | 2024-05-08 | Schaeffler Technologies AG & Co. KG | Electrical circuit arrangement for a high-voltage component for a vehicle and method for operating such an electrical circuit arrangement |
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2018
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112422016A (en) * | 2019-08-22 | 2021-02-26 | 深圳市正弦电气股份有限公司 | Self-adaptive intelligent energy-saving control method and control system for oil pumping unit in oil field |
| CN112422016B (en) * | 2019-08-22 | 2022-06-24 | 深圳市正弦电气股份有限公司 | Self-adaptive intelligent energy-saving control method and control system for oil pumping unit in oil field |
| CN114156862A (en) * | 2021-12-06 | 2022-03-08 | 山东爱特机电技术有限责任公司 | Optical storage direct current micro-grid technology of oil pumping unit |
| CN114665510A (en) * | 2022-05-27 | 2022-06-24 | 西安海联石化科技有限公司 | Photoelectric energy source direct current power supply pumping unit well group energy-saving control system |
| CN115189594A (en) * | 2022-06-21 | 2022-10-14 | 湖北文理学院 | Motor soft start control system and device |
| DE102022129517A1 (en) * | 2022-11-08 | 2024-05-08 | Schaeffler Technologies AG & Co. KG | Electrical circuit arrangement for a high-voltage component for a vehicle and method for operating such an electrical circuit arrangement |
| CN116632877A (en) * | 2023-07-19 | 2023-08-22 | 深圳市清研储能技术有限公司 | Power supply device and power supply method of oil field pumping unit |
| CN116632877B (en) * | 2023-07-19 | 2024-04-30 | 深圳市清研储能技术有限公司 | Power supply device and power supply method of oil field pumping unit |
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Effective date of registration: 20240109 Address after: 101-10, 4th floor, building 5, yard 9, Dijin Road, Haidian District, Beijing Patentee after: BEIJING ETROL OIL AND GAS TECHNOLOGY Co.,Ltd. Address before: No.56 Jinye 1st Road, High tech Zone, Xi'an City, Shaanxi Province, 710065 Patentee before: SHAANXI ETROL TECHNOLOGIES CO.,LTD. |