CN104898579B - Rod-pumped well data acquisition control system and its method based on wireless network - Google Patents

Rod-pumped well data acquisition control system and its method based on wireless network Download PDF

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Publication number
CN104898579B
CN104898579B CN201410076737.1A CN201410076737A CN104898579B CN 104898579 B CN104898579 B CN 104898579B CN 201410076737 A CN201410076737 A CN 201410076737A CN 104898579 B CN104898579 B CN 104898579B
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China
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data
control unit
wireless
wellhead
radio network
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CN201410076737.1A
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Chinese (zh)
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CN104898579A (en
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李金英
宋云红
杜方
孙金
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沈阳中科奥维科技股份有限公司
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/418Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
    • G05B19/4185Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by the network communication
    • G05B19/41855Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by the network communication by local area network [LAN], network structure
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The present invention relates to the rod-pumped well data acquisition control system based on wireless network, including configuration computer, Industrial Ethernet, WIA radio network gateways, wellhead control unit and data collection station;Configuration computer is connected by Industrial Ethernet with WIA radio network gateways;Wellhead control unit is arranged at oil pumping machine well head, is carried out wireless communication with data collection station, WIA radio network gateways.Method comprises the following steps:Each instrument by the pumping unit data sending of timing acquiring to its wellhead control unit in same rod-pumped well, which is sent to WIA radio network gateways by pumping unit real time data;Configuration computer receives the real time data of network state information that WIA radio network gateways send and each pumping unit by Industrial Ethernet, sends control command and is issued to corresponding wellhead control unit through WIA radio network gateways;The wellhead control unit RTU of the present invention has wireless routing function, has barrier to block or can realize data communication by multihop network when wireless signal is bad, ensures data reliability.

Description

Rod-pumped well data acquisition control system and its method based on wireless network

Technical field

It is specifically a kind of to be based on WIA- the present invention relates to a kind of rod-pumped well data acquisition control system and its method The rod-pumped well data acquisition control system and its method of PA industry wireless networks.

Background technology

In recent years, based on well site, stand, the data acquisition of the oil gas fields production scene such as storehouse, process control, parameter optimization, pipe Reason decision-making etc. show especially it is important, by automatic technology, the communication technology, information technology fusion production of hydrocarbons Internet of things system in intelligence Identification, data fusion, data application etc. are played a greater and greater role, and production of hydrocarbons Internet of Things is that oil gas field informationization is built If the inexorable trend of development.

Production of hydrocarbons Internet of things system is exactly by technologies such as sensing, radio frequency, communications, to oil gas water well, metering room, oil gas The production objects such as storehouse and related collection transmission pipe network of standing comprehensively are perceived, and realize creation data automatic collection and control, oil gas field Production run monitors and management, and then improves the automatization level of production operation unit, further improves oil gas field production decision Promptness and accuracy.

What oil gas field was different degrees of at present implements production of hydrocarbons automation, digital Construction.For creation data Acquisition and the wired and wireless two kinds of directions of control system, wired acquisition and control system in construction, maintenance etc. not It is convenient, and current wireless system is mostly based on Zigbee system designs, wireless communication success rate is low, can not ensure that whole day monitors The timely and accurately property of data.

The content of the invention

It is an object of the present invention to provide a kind of for that can fully achieve the pumping of wireless communication in WIA-PA industry wireless networks Oil machine well data acquisition control system and method.

Present invention technical solution used for the above purpose is:Rod-pumped well data acquisition based on wireless network Control system, including configuration computer, Industrial Ethernet, WIA radio network gateways, wellhead control unit and data collection station;Group State computer is connected by Industrial Ethernet with WIA radio network gateways;Wellhead control unit is arranged at oil pumping machine well head, is adopted with data Collection terminal, WIA radio network gateways carry out wireless communication.

The wellhead control unit is multiple, and each wellhead control unit is arranged in an oil pumping well head;Each Wellhead control unit forms star network with instrument, also forms MESH network with WIA radio network gateways.

The wellhead control unit includes processor module and I/O input/output modules connected to it, three-phase electricity are adopted Collect module, Local Communication Module, LCD MODULE, power management module, data remote interface module and WIA radio communication molds Block.

The three-phase electricity acquisition module uses resistance, current transformer, power measurement IC and signal isolation chip;Three is intersecting It is connected after multiple resistance that are often in series of galvanic electricity, by wave filter with the control source passage of power measurement IC, also passes through per phase Varistor is grounded;Three current transformers are each passed through three-phase alternating current electric wire, the positive-negative output end of each current transformer it Between connect there are one resistance and the parallel circuit for two resistance connected, be connected with amplitude limiter circuit, amplitude limit between the both ends of parallel circuit The both ends of circuit are connected by filter circuit with the electric current input channel of power measurement IC;The output terminal of power measurement IC is through signal Isolating chip is connected with processor module.

The parallel connection electricity of resistance, two capacitances connected and a capacitance is connected between the input terminal of the wave filter and ground Road;The both ends of capacitance are connected respectively with the control source passage of power measurement IC;The electricity that one end of resistance eutral grounding is connected with two Hold and be also connected with another resistance between one end of ground connection, the node ground connection between the capacitances of two series connection.

The filter circuit includes resistance and capacitance;Two input terminals of filter circuit pass through resistance and power measurement respectively The input terminal of IC connects, and two capacitances of series connection and the parallel connection electricity of a capacitance are connected between two input terminals of power measurement IC Road;Node ground connection between two capacitances of series connection.

Rod-pumped well data acquisition control method based on wireless network, comprises the following steps:

Each data collection station controls the pumping unit data sending of acquisition to its well head in same rod-pumped well The electrical parameter information of pumping unit data and itself acquisition is sent to WIA radio network gateways by unit, the wellhead control unit, simultaneously Carry out data storage;

Configuration computer receives network state information and each pumping unit number that WIA radio network gateways are sent by Industrial Ethernet According to and electrical parameter information, send control command to WIA radio network gateways;Control command is issued to accordingly by WIA radio network gateways Wellhead control unit;If control command, wellhead control unit is according to the current rod-pumped well state of control command content detection And perform control command;If configuration order, then it is sent to corresponding instrument and carries out parameter modification and configuration.

Each data collection station by the pumping unit data sending of acquisition to its well head in same rod-pumped well Control unit is specially:Wireless temperature transmitter is by temperature data in rod-pumped well, wireless pressure transmitter by pumping unit pressure Work(diagram data is wirelessly transmitted to and its wellhead control unit in same rod-pumped well by data, wireless indicator.

Work(diagram data is wirelessly transmitted to and its wellhead control unit in same rod-pumped well by the wireless indicator Comprise the following steps:

When work(diagram data is transmitted between indicator and wellhead control unit 0 number is sent comprising 0~n bag datas, indicator After bag, after waiting the reply data bag for receiving wellhead control unit, start to continuously transmit 1~n-1 number bags, it need not Response;N number bags are sent after being sent completely, after waiting the reply data bag for receiving wellhead control unit, complete this work( Figure transmission process;

If can not receive the response of 0 or n number bags, indicator, which starts, to be retransmitted, and is retransmitted 1 time at interval of 30s, is retransmitted altogether 10 times, if still can not receive response, abandon this transmission process;

When 0~n numbers as entirely transmitted are surrounded by loss, benefit packet procedures are carried out, that is, after sending n number bags, are waited Wellhead control unit reply data bag, contains wellhead control unit data packet Incomplete information and missing in reply data bag Data packet sequence row number, indicator continuously retransmits the deficiency of data bag, and retransmits n number bags, until receiving well head After control unit response work(diagram data is complete, terminate this transmission process.

The electrical parameter information includes pumping unit three-phase voltage, three-phase current, power factor (PF), active power, idle work( Rate, apparent energy, line frequency, active energy, map of current.

The invention has the advantages that and advantage:

1. the present invention realizes rod-pumped well data real-time automatic collecting, for the analysis of oil gas Internet of Things data and Instructing manufacture Direct data message is provided.

2.WIA wireless networks in the range of 300 meters of visual range can direct communication, and wellhead control unit RTU has Wireless routing function has barrier to block or can realize data communication by multihop network when wireless signal is bad, communicates into Power reaches 99%, ensures data reliability.

3. using wireless temperature transmitter, wireless pressure transmitter, wireless integral indicator and use wireless network remote The wellhead control unit design of data is passed, opens install convenient, saving human cost, solution wiring is inconvenient and is unfavorable for maintenance etc. Problem.

4. using WIA-PA wireless communication techniques, wellhead control unit can support wired and wireless telecommunications, realize simultaneously The full-automation of Oil Field not only realizes the real time monitoring of oil pump running situation, and condition is provided for timely processing failure, A large amount of manpowers have also been liberated, have been conducive to human resources allocation optimization.Wireless technology simplifies the wiring and setting of field device, excellent Field wiring and installation are changed.

It 5. three-phase electricity acquisition module uses isolation technology, realizes and isolates with RTU other parts, ensure that RTU in itself Security.

6. realizing RTU and electric quantity acquisition integrated design, the parameter information of three-phase electricity, wellhead control unit can be gathered It is pumping unit of well mouth data sampling and processing, control device, data sampling and processing and storage is carried out to the data of various input quantities And it is forwarded to.

Description of the drawings

Fig. 1 is the block diagram of system of the present invention;

Wherein, 11 configuration computer, 12 real-time data bases, 13 cables, 14 Industrial Ethernet, 15WIA radio network gateways, 16 resistances Block material, 17WIA wireless networks, 18 wellhead control units, 19,20,21 instrument;

Fig. 2 is the upstream data flow block diagram of the present invention;

Fig. 3 is the downlink data flow block diagram of the present invention;

Wherein, 23WIA wireless communication modules, 24 processor modules, 25 three-phase electricity acquisition modules, 26WIA wireless receiving and dispatching moulds Block, 27 data acquisition and procession modules;

Fig. 4 is the flow chart one that indicator transmits work(figure with wellhead control unit;

Fig. 5 is the flowchart 2 that indicator transmits work(figure with wellhead control unit;

Fig. 6 is the flow chart 3 that indicator transmits work(figure with wellhead control unit;

Fig. 7 is the wireless pumping unit controller structure composition block diagram based on WIA-PA;

Wherein, 720 shell, 721I/O input/output modules, 722 three-phase electricity acquisition modules, 723 Local Communication Modules, 724 Processor module, 725 LCD MODULEs, 726 power management modules, 727 data remote interface modules, 728WIA-PA is wireless Communication module, 729 antenna patchcords, 730 antennas;

Fig. 8 is three-phase electricity acquisition module functional block diagram;

Wherein, 831 three-phase alternating current, 832 voltage transformers or divider resistance, 833 current transformers, 834 signal tune Manage circuit, 835 power measurement IC, 836 signal isolation chips, 837MCU, 838 power isolation modules;

Fig. 9 is single-phase voltage circuit diagram in three-phase electricity acquisition module;

Figure 10 is electric current front-end circuit schematic diagram in three-phase electricity acquisition module.

Specific embodiment

The present invention is described in further detail with reference to the accompanying drawings and embodiments.

Rod-pumped well acquisition and control system based on WIA-PA intelligent wireless networks fully achieves production of hydrocarbons Internet of Things creation data automatic collection and control function.The data collection station for being installed on well head passes through sensing and radio communication skill The real-time production data of automatic collection is transmitted to wellhead control unit RTU, RTU by art(REMOTE TERMINAL UNIT)Storage And pass through WIA radio network gateways and send data to Central Control Room;Meanwhile the remote control command that Central Control Room issues is through WIA wireless networks Pass is issued to wellhead control unit RTU, RTU and performs control command or be issued to wireless acquisition terminal.

System is made of real time data wireless acquisition terminal, wellhead control unit and WIA radio network gateways, realizes pumping unit life The data acquisition of production real-time parameter stores and is transmitted to the central control room at rear, and performs the remote control life of central control room Order, realizes real-time remote monitoring and the data acquisition of production process.

Central Control Room connects WIA radio network gateways, WIA radio network gateways, wellhead control unit RTU, data acquisition by Ethernet Pass through WIA wireless communications between terminal.Data collection station include wireless pressure transmitter, wireless temperature transmitter and Wireless integral indicator, the real time data of acquisition include oil pressure, casing pressure, temperature, work(figure.Wellhead control unit RTU realizes electricity Amount parameter acquisition, remote control receive the functions such as the real-time parameter data for storing and forwarding data collection station, the electricity of acquisition Parameter includes three-phase voltage, electric current, power factor etc., also includes the map of current of reaction pump load situation.One WIA gateway No more than 20 wellhead control units RTU, RTU can be connected to adopt with data with Wireless MESH network, RTU is formed between gateway Star network is formed between collection terminal.

System data flows to:Oil pressure, casing pressure, temperature, electrical parameter (including voltage, electric current, power factor etc.) count in real time 10 seconds are fixed according to this is uploaded to Central Control Room for the cycle;Work(figure and electric current diagram data are according to the acquisition interval (30 minutes of user configuration Or 60 minutes) it is uploaded to Central Control Room.After the completion of acquisition interval configuration, entire data acquisition and upload procedure are real to automatically control The automatic collection of real time data is showed.Correspondingly, user can monitor real time data by the general configuration interface of Central Control Room, and Issuing remote control command (as long-range start and stop well controls) and inquiry, modification wellhead control unit RTU and wireless acquisition terminal Parameter information.

The present invention realizes a kind of oil gas Internet of Things and builds Bowl station acquisition and control system, wireless based on WIA-PA Network design.The system can realize the real-time monitoring of oil well working condition, and procedure parameter gathers in real time and is transmitted to Central Control Room Database provides complete data message for data analysis and Instructing manufacture.Wellhead control unit RTU can be passed through in simultaneity factor Preserve the historical data information of one week.

Fig. 1 describes the system topological figure of acquisition and control system 10 of the present invention.System is supervised by Central Control Room Equipment, WIA radio network gateways and wellhead equipment composition are controlled, as shown in fig. 1, Central Control Room is included based on the configuration for showing and controlling The real-time data base 12 of calculation machine 11 and storage pumping unit procedure parameter real time data;WIA radio network gateways 15 are adaptive by 10/100M Ethernet interface is answered to be connected to 14 link of well site Industrial Ethernet, realizes the downstream transmission of data.Well head collecting unit includes The wellhead control unit RTU18 of integrated electrical parameter acquisition and the data acquisition of acquisition oil temperature, pressure, work(figure etc. are whole End is instrument, and instrument includes wireless temperature transmitter, wireless pressure transmitter, wireless integral indicator etc..Well head control is single Member with forming star network between instrument, as instrument 19,20,21 by WIA wireless networks 17 by respective real-time Data Transmission extremely Wellhead control unit RTU1, each well head are independent star network, that is to say, that instrument 19 cannot directly be connected by WIA wireless networks It is connected to RTU2.Single wellhead control unit RTU can at most support 6 wireless collection equipment.Well head RTU units and WIA wireless networks MESH network is formed between pass, well head RTU units support wireless routing function, as shown in fig. 1, RTUm and WIA radio network gateways Between there is barrier to block, can not direct communication, but multihop network is formed after being route by RTU2 and realizes data communication.It is single WIA radio network gateways can at most support 20 wellhead control unit RTU equipment.WIA radio network gateways and wellhead control unit in system RTU is wired power supply unit, ensures that control is reliable, and wireless acquisition terminal equipment is battery supply set, non-data acquisition and hair It send the cycle in a dormant state, to save power consumption, improves battery life.

, it is necessary to which configure necessary on-site parameters just can normally work in networking after the completion of system building, including:Network is joined Number, timing parameters, rod-pumped well stroke information are according to live necessary configuration item.

The acquisition and control system of the present invention mainly realizes the real-time of data and gathers with user's remote command just It really issues, i.e., mainly includes two data stream of uplink and downlink.Wherein upstream be mainly data collection station according to The automatic data collection that family configuration is completed uploads;Downstream data flow is mainly that user instruction issues, and further includes user and actively reads Current state information, real time data, equipment configuration parameter information, plant maintenance parameter information etc. read historical data information behaviour Remote control operation order of work and rod-pumped well etc..

The system upstream is described in detail in Fig. 2.After the completion of system installation networking, the timing of wireless acquisition terminal equipment Time by 27 automatic start of data acquisition and procession module gathers real time data after arriving, and is handled accordingly:As pressure, Temperature transmitter carries out sensing numerical computations and conversion, when indicator calculates current according to the load and acceleration signal of acquisition Work(figure is carved, and follows WIA agreements data is transmitted to the WIA of wellhead control unit RTU by radio receiving transmitting module 26 and wirelessly receive Send out module.Wellhead control unit RTU receives data from WIA wireless communication modules 23 and stores to real-time data memory area in RTU, Data are sent to WIA radio network gateways by WIA radio receiving transmitting modules according still further to pre-defined rule;Meanwhile RTU also according to timing when Between gather electrical parameter, store to internal real time data area by processor module 24 after calculation process, and communicate mould by WIA Block 23 is sent to WIA radio network gateways.Wellhead control unit RTU can periodically preserve real time data to RTU internal histories data field, So that user reads and analyzes.

The system downstream data flow is described in detail in Fig. 3.As shown in figure 3, the configuration computer 11 that user passes through Central Control Room The network state information of current system and each pumping unit working status parameter are observed, including temperature, pressure, work(figure, map of current etc.. User can carry out remote control, such as the control of long-range start and stop well by configuration computer.It is wireless to WIA that user issues control command Control command is issued to corresponding wellhead control unit RTU by gateway after the parsing of WIA radio network gateways, and RTU parses control command, Rod-pumped well order is controlled in this way, then detects current oil well state and perform control command;If configuration order, then it is distributed to The corresponding end that is configured carries out parameter modification and configuration.Since system communication is full Wireless mode, user only may be used during networking application It configures device parameter and network parameter configuration cannot be carried out, equipment can not network after avoiding no operation.

System devises the application protocol of data integrity, WIA radio network gateways, well head control according to WIA-PA network feature It is required to ensure the integrality of data transmission between unit and indicator, as shown in Figure 4.For example, indicator is controlled with well head Comprising 0~21 bag data when transmitting work(diagram data between unit, after indicator sends 0 number bag, wait and receive answering for RTU After answering data packet, start to continuously transmit 1~20 number bag, response is not required;21 number bags are sent after being sent completely, are waited After the reply data bag for receiving RTU, this work(figure transmission process is completed.If can not receive the response of 0 or 21 number bags, As shown in figure 5, then indicator starts re-transmission, retransmitted 1 time at interval of 30s, retransmit 10 times, if still can not receive response, abandon altogether This time transmission process.When 0~21 number as entirely transmitted is surrounded by loss, benefit packet procedures are carried out with reference to figure 6, that is, send No. 21 After data packet, RTU reply data bags are waited, RTU data packets Incomplete information and the number of missing are contained in reply data bag According to packet number, indicator continuously retransmits the deficiency of data bag, and retransmits 21 number bags, until receiving RTU responses After work(diagram data is complete, terminate this transmission process.

Following proposal may be employed in wellhead control unit RTU in the present invention:

Based on ARM platform developments, using 32 bit processors, and integrated electric quantity acquisition function is, it can be achieved that the number of industry spot According to functions such as the remote control of information gathering and field device, fault alarms, with reliability is high, processing speed is fast, communication is steady Calmly, the features such as maintenance cost is low.

Wellhead control unit structure composition block diagram is as shown in fig. 7, mainly including shell 720 and being arranged in shell 720 Electronic device forms, and mainly includes I/O input/output modules 721, three-phase electricity acquisition module 722, Local Communication Module 723, place Manage device module 724, liquid crystal display 725, power management module 726, data remote interface module 727 and WIA-PA radio communication molds Block 728.

I/O input/output modules 721 mainly include 8 tunnels(AI)Analog input interface, 4 tunnels(DI)Digital quantity input connects Mouthful, 4 tunnels(DO)Digital-quantity output interface.

Analog input interface supports the input of 4-20mA signals, for connecting live cable instrument, input signal and CPU it Between using isolating chip carry out signal isolation.

Digital-quantity input interface is used for collection site signal status information, supports 12V/24V inputs.

Digital-quantity output interface is used to indicate lamp state instruction and field control, and field control is exported using relay.Often A normally opened contact and a normally-closed contact are supported in output all the way, for controlling the start and stop of motor and audio alert switch etc..

Three-phase electricity acquisition module 722 is responsible for gathering the phase current of pumping unit, phase voltage, active power, reactive power, apparent The high current of motor and big voltage are changed into low current and small voltage by the electrical parameters such as power, power factor (PF), frequency, mutual inductor, The signal that mutual inductor exports is changed into processor by signal conditioning circuit can receive matched signal form, IC pairs of power measurement The voltage and current signal analysis and processing of input calculates corresponding result electric parameter.

Local Communication Module 723 supports 1 RS232,1 RS485,1 10M/100M Ethernet interface, and more than interface is equal It supports upgrading RTU programs, is locally displayed and is locally configured and safeguard RTU.

Processor module 724 includes processor(MCU)And memory, it is responsible for the operation of control whole scene equipment, storage The data that the data and other field devices gathered in itself with processing are sent.

Measured signal is become a kind of form that can be understood by people by LCD MODULE 725, is shown including data, is bent Line, chart etc., for people's field observation and analysis.

Power management module 726 provides the energy needed for operation for pumping unit RTU controllers.Power management module makes scene There is equipment power supply status to monitor/fault alarm function in real time, convenient for safeguarding in time.The power supply of power management module is usually 24V powers, and the supply voltage each needed is provided for each module by internal electric source conversion chip.It is interior to be adopted between each unit With isolated power supply form, interfering with each other between unit is prevented.

Data remote interface module 727 includes supporting WIA-PA digital filters, the support GPRS designed for subsequent expansion GPRS teletransmission interface modules, support the teletransmission interface module of WIFI.

WIA wireless communication modules 728 are responsible for and well head other instrument, other pumping unit of well mouth RTU controllers, WIA gateways It carries out wireless communication, exchange of control information and transmitting-receiving gathered data.Processor module 724 and WIA wireless communication modules 728 pass through Serial ports carries out two-way communication.WIA wireless communication modules include radio frequency communications circuitry, and some antennas trace is included in printed circuit board On, radiofrequency signal is transmitted by radiofrequency signal by PCB antenna seat, Coaxle cable antenna patchcord 729 and antenna 730.

Electric quantity acquisition function and RTU are realized integrated design by wellhead control unit, electricity and with RTU integrated designs It is as shown in Figure 8 to associate framework.

831 be the three-phase alternating current of detection, is the supply line of pumping unit on oil field, and three-phase electricity acquisition module gathers three Cross streams piezoelectric voltage, current signal, voltage pass through divider resistance or voltage transformer 832, and electric current is mutual by high-precision current Big signal is converted to small-signal by sensor 833, and the conditioning of signal, power measurement are then carried out by signal conditioning circuit 834 Signal after the processing conditioning of IC835 real-time samplings, draws single-phase phase voltage, phase current virtual value, apparent energy, active power, The information such as reactive power, power factor, line frequency, MCU read the metering transformed data of IC by spi bus.The present embodiment Middle power measurement IC uses cirrus logic single-phase power IC chips, and A, B, C phase, the group of alternating current are respectively used to using three pieces Three phase power acquisition is synthesized, isolating chip uses optocoupler and digital isolator, and signal conditioning circuit includes resistance, wave filter, limit Width circuit and filter circuit.

Fig. 9,10 are the single-phase voltage and electric current front-end circuit schematic diagram in three-phase electricity acquisition module, and UA is the A of three-phase electricity Phase, RV5 are varistor, form the surge protection on power line, achieve the purpose that anti-lightning strike.R115, R153, R154, R155, R103 is divider resistance, by partial pressure the input signal of VIN+ and VIN- is made to limit maximum input electricity of the volt in power measurement IC requirements Pressure is following, is not limited to 5 resistance here, multiple resistance may be employed, increase the stability of system.Meanwhile R103, R104, C60, C61, C66 shaping filter, are filtered signal.

As shown in Figure 10, U23 is current transformer, and high current is transformed to low current, and current transformation is voltage by R118, By selecting resistance value, by the voltage limit volt of IINA+ and IINA- below the maximum input voltage of power measurement IC requirements.Together When R119 and R120 signal is made to be transformed to differential signal, bidirectional transient voltage suppressor D27, D28 are composed in series voltage amplitude limit electricity Road(D27, D28 intermediate node are grounded), by big voltage amplitude limit below the acceptable maximum voltage of chip.R121 and R122 is current limliting Resistance, meanwhile, R121, R122, C69, C70, C71 composition filter circuit, signal is filtered.

Wellhead control unit is designed as three-phase alternating current electric parameter measurement, and measuring IC chip by three pieces single-phase power is combined as Three-phase electricity is measured in the measurement of three-phase electricity respectively, is added by closing, is calculated three-phase combination phase electrical parameter.With three-phase Three-wire system and three-phase four-wire system self-adapting estimation function, it is Wu Zhuantai to indicate, can directly it judge from the mode of connection, three-wire system is not connected to N lines, four-wire system connection N lines.It is gathered with map of current, power diagram acquisition, the uneven alarm of three-phase electricity, three-phase electric power open phase alarm etc. Electric quantity acquisition function.

Electric current conversion realizes that voltage conversion can be by voltage transformer, can also be by big by current transformer Electric resistance partial pressure.The precision of current transformer can influence the accuracy of metering, therefore, current transformer selection high-precision current mutual inductance Device, the phase angle of voltage can be influenced using voltage transformer, and the method that the design uses electric resistance partial pressure is being transformed to the electricity of small-signal Resistance must select high-precision, the resistance that power is big, temperature stability is good, and multiple resistance are connected, to ensure that measures conversion is believed Number precision.Entire unit introduces the forceful electric power of electric system, it is contemplated that power line and the power-supply fluctuation of load and system safety are adopted It is protected with varistor because the instantaneous voltage mutation of electric power supply system may be to the injury of circuit, when high pressure arrives When, the resistance of varistor reduces and is shunted electric current, prevents that big instantaneous voltage is subject to destroy and disturb, and protects Sensitive electronic building brick.System also carries out overvoltage protection using TVS protective currents input port.

Three-phase electricity acquisition module part power supply passes through power isolation module 38 and other power supplys(Power management module 726)Keep apart, for power measurement IC, signal isolation chip power supply, the present embodiment to use isolated from power chip.Serially Interface is using (25M) isolating device isolation at a high speed.Other I/O interfaces are isolated using common optical coupler, by the forceful electric power of introducing and RTU its He, which is partly or completely isolated, comes, and protects the security of RTU veneers completely.

RTU supports long-range start and stop well control function, and workflow is:RTU passes through three-phase piezoelectric voltage, current detecting pumping unit Operating status if current state is operation, opens well order and does not perform;After Qi Jing, RTU reception Central Control Room open well order, pass through For DO0 digital outputs to phonetic alarm, phonetic alarm sends 1min phonic warnings, opens pumping unit by DO1 afterwards;Stop After RTU reception Central Control Rooms stop well order, pumping unit is closed by DO2 for well.

Control function realization relies on digital quantity input/output port and the design of three-phase electricity collecting unit, hardware design upper end Mouth input realizes 2500V isolating and protectings by special photoelectric isolating chip, and CPU interrupting inputs is used to promote the response time; Output port realizes isolating and protecting again by photoelectric isolated chip, and output port form exports for relay.

When Qi Jing is operated, after well order is opened in RTU receptions, current pumping unit operating status is detected, if current state is operation, It does not perform then and opens well order, report current state to open well information;If current state opens well letter to shut down after reporting 1 minute Breath.Whether detection current state has been turned on after the completion of execution, and startup then reports Qi Jing to complete information, not actuated, reports and opens well event Hinder information.

When stopping well operation, after RTU receptions stop well order, execution stops well order.Whether detection current state has shut down, and shuts down It reports and stops well completion information, do not shut down, report and stop well fault message.

Oil recovery factory can install the system according to oil well distribution situation, since wellhead control unit and wireless acquisition terminal are pacified Near rod-pumped well, WIA wireless communication success rates reach 99%.It need to ensure that well and well and WIA are wireless between more wells during networking Visual range between gateway is no more than 300 meters, with ensure at least a well can with WIA radio network gateway direct communications, and Distant well can also be communicated by multihop network with WIA radio network gateways.Oil field is much more spacious, and oil well disperses, nobody sees Pipe, the present invention can realize Collection of Remote Real-Time Data and full Wireless networking, meet digitlization oilfield construction demand data and The problem of field wiring is inconvenient.

Claims (2)

1. the rod-pumped well data acquisition control method based on wireless network, it is characterised in that comprise the following steps:
Each data collection station by the pumping unit data sending of acquisition to its wellhead control unit in same rod-pumped well (17), which is sent to WIA radio network gateways by the electrical parameter information of pumping unit data and itself acquisition (15), data are carried out at the same time to store to internal history data field, the historical data of preservation one week;
Configuration computer (11) receives network state information that WIA radio network gateways (15) send and each by Industrial Ethernet (14) Pumping unit data and electrical parameter information send control command to WIA radio network gateways;WIA radio network gateways issue control command To corresponding wellhead control unit (17);If control command, wellhead control unit (17) is according to control command content detection Current rod-pumped well state simultaneously performs control command;If configuration order, then it is sent to corresponding instrument and carries out parameter modification With configuration;
Each data collection station controls the pumping unit data sending of acquisition to its well head in same rod-pumped well Unit is specially:Wireless temperature transmitter by temperature data in rod-pumped well, wireless pressure transmitter by pumping unit pressure data, Work(diagram data is wirelessly transmitted to and its wellhead control unit (17) in same rod-pumped well by wireless indicator;
Work(diagram data is wirelessly transmitted to by the wireless indicator to be included with its wellhead control unit in same rod-pumped well Following steps:
When work(diagram data is transmitted between indicator and wellhead control unit 0 number bag is sent comprising 0~n bag datas, indicator Afterwards, after waiting the reply data bag for receiving wellhead control unit, start to continuously transmit 1~n-1 number bags, need not answer It answers;N number bags are sent after being sent completely, after waiting the reply data bag for receiving wellhead control unit, complete this work(figure Transmission process;
If can not receive the response of 0 or n number bags, indicator, which starts, to be retransmitted, and is retransmitted 1 time at interval of 30s, is retransmitted 10 altogether It is secondary, if still can not receive response, abandon this transmission process;
When 0~n numbers as entirely transmitted are surrounded by loss, benefit packet procedures are carried out, that is, after sending n number bags, wait well head Control unit reply data bag contains wellhead control unit data packet Incomplete information and the number of missing in reply data bag According to packet number, indicator continuously retransmits the deficiency of data bag, and retransmits n number bags, until receiving well head control After unit response work(diagram data is complete, terminate this transmission process.
2. the rod-pumped well data acquisition control method according to claim 1 based on wireless network, it is characterised in that:Institute Stating electrical parameter information includes pumping unit three-phase voltage, three-phase current, power factor (PF), active power, reactive power, apparent work( Rate, line frequency, active energy, map of current.
CN201410076737.1A 2014-03-04 2014-03-04 Rod-pumped well data acquisition control system and its method based on wireless network CN104898579B (en)

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