CN201508408U - Intelligent device for wirelessly monitoring state of storage batteries used for direct current screen of transformer substation - Google Patents

Intelligent device for wirelessly monitoring state of storage batteries used for direct current screen of transformer substation Download PDF

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Publication number
CN201508408U
CN201508408U CN200920228195XU CN200920228195U CN201508408U CN 201508408 U CN201508408 U CN 201508408U CN 200920228195X U CN200920228195X U CN 200920228195XU CN 200920228195 U CN200920228195 U CN 200920228195U CN 201508408 U CN201508408 U CN 201508408U
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China
Prior art keywords
data acquisition
accumulator
circuit
data
antenna
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Expired - Fee Related
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CN200920228195XU
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Chinese (zh)
Inventor
杜忠东
王晓琪
陈轩恕
刘飞
胡媛媛
张�杰
李辉
但小容
何妍
赵军
柳欢欢
徐思恩
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Wuhan NARI Ltd
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Wuhan NARI Ltd
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Priority to CN200920228195XU priority Critical patent/CN201508408U/en
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Publication of CN201508408U publication Critical patent/CN201508408U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model relates to an intelligent device for wirelessly monitoring the state of storage batteries used for a direct current screen of a transformer substation. The device comprises two parts: a data acquisition part and a wireless communication part, wherein the data acquisition part mainly comprises data acquisition modules, a current sensor, a signal acquisition circuit and a DSP (digital signal processor); the wireless communication part comprises two parts: an RF (radio frequency) circuit and an antenna; a data acquisition module is connected on each storage battery; the storage batteries are connected in series to form a storage battery set; the current sensor is arranged in the data acquisition module of one storage battery of the storage battery set; the data acquisition modules and the current sensor are respectively connected with the signal acquisition circuit which is connected with the DSP; the DSP is connected with the RF circuit; and the RF circuit sends data to a master station through the antenna. The device has the advantages of low maintenance cost, high flexibility and good expansibility.

Description

DC screen of transformer substation intelligent battery state wireless monitoring device
Technical field
The utility model relates to a kind of DC screen of transformer substation with intelligent battery state wireless monitoring device, belongs to accumulator detection technique field.
Background technology
Straight-flow system provides reliable direct supply for control, signal, relay protection, aut.eq. and emergency lighting etc. in transformer station; it also provides reliable operating power for the operation of isolating switch etc., and therefore straight-flow system is the necessary condition of substation safety, stable operation reliably.Battery pack is in hot stand-by duty under normal operation, by charging set it is carried out floating charging, under the full accident conditions of losing of alternating current, is born the load of straight-flow system by battery pack.Battery pack plays a part very important as standby power supply, except that needs are made the Charge Management of all filling of routine or floating charge, also will patrol and examine the routine work state of battery pack.At present for the maintenance and the performance evaluation of transformer station's battery pack, mostly rest on traditional detection method at home.The daily detection mode of transformer station's accumulator mainly contains:
(1), differentiates the capacity (once a year) of accumulator by the property checked discharge;
(2) accumulator is exported the characteristic test of big electric current, promptly utilizes discharge module to carry out discharge test (once a year);
(3) terminal voltage of measurement electric battery (comprising single battery);
The most direct detection method of accumulator is to carry out discharge test, measures the actual capacity of battery.Existing discharge operation adopts variable resistor, carbon-point usually or carries out in the tank current, switch regulating load resistance by artificial or relay, the manual voltage of measuring every batteries, its labour intensity is big, poor stability, stabilized current characteristic are also poor, precision of steady current that level regulates is arranged generally greater than 5%.This mode can be destroyed the integrality of stand-by power source, can not often use, and carries out the single step of releasing electric test therefore general every year.This detection mode can't be carried out condition monitoring in running order accumulator, can't in time find out of order accumulator.The domestic accumulator conductivity test instrument of using often can react the running status of accumulator more accurately, but this measurement also regularly carries out, and can't realize the on-line monitoring of accumulator equally.
In view of above reason, transformer station adopts wired formula on-line monitoring system that the running status of battery pack is monitored in real time more.The inefficacy of accumulator, obviously increase, off-capacity or the electric current that sparks do not satisfy load request etc. mainly to show as terminal voltage deficiency, battery open circuit or internal resistance.At present domestic main on-line monitoring system has testing apparatus such as battery tension logging to be used to test accumulator voltage, but this logging is is only patrolled and examined the terminal voltage of accumulator, and when accumulator is in floating charge state, measure, can not correct response accumulator running status.
Along with the further investigation of people to accumulator monitoring equipment, more advanced wired formula on-line monitoring system comes out, terminal voltage that can the on-line monitoring accumulator, electric current, internal resistance or the like.The utility model changes wired system into wireless monitor system having on the original monitoring function of the line monitoring system basis.
Summary of the invention
The purpose of this utility model provides a kind of DC screen of transformer substation intelligent battery state wireless monitoring device, this device is by data acquisition and two parts of wireless telecommunications, running statuses such as the terminal voltage of on-line monitoring accumulator, electric current, and carry out data communication by wireless mode and master station.
The technical solution of the utility model is: DC screen of transformer substation intelligent battery state wireless monitoring device, partly form by part of data acquisition and wireless telecommunications, wherein part of data acquisition is become by data acquisition module, current sensor, signal acquisition circuit, DSP bank of digital signal processors, it is characterized in that: the wireless telecommunications part is made up of RF radio circuit, antenna two parts; Relation between the each several part is: connect a data acquisition module on each accumulator, accumulator is composed in series battery pack, in the data acquisition module of one of them accumulator of each battery pack, add current sensor, data acquisition module is connected with signal acquisition circuit respectively with current sensor, signal acquisition circuit connects the DSP digital signal processor, the DSP digital signal processor connects the RF radio circuit, and the RF radio circuit sends the data to master station by antenna.
Aforesaid DC screen of transformer substation is characterized in that with intelligent battery state wireless monitoring device: data acquisition module is integrated voltage sensor, adopt compact design, and from accumulator self power taking, be installed in the monitoring point of each accumulator nearby.
Aforesaid DC screen of transformer substation intelligent battery state wireless monitoring device, it is characterized in that: standard configuration 10cm antenna is partly adopted in wireless telecommunications, antenna is fixed on the RF radio circuit, during antenna height 1.5m, transmission range can reach 600m, and 8~16 channels and multiple transfer rate can be provided.
The beneficial effects of the utility model are:
(1) maintenance cost is low
Wired system wiring cost height, the labour intensity height, and the expense of the maintenance of communication line and upgrading is all than higher, the puzzlement of problems such as circuit predisposes to damage, mechanical wear, aging circuit; Wireless system is easy to set up, be provided with and safeguard all fairly simple, its clout line expense be wired system can not compare.
(2) dirigibility height
Will be subjected to the connecting up restriction of general layout of traditional wired system layout bring the difficulty that can not estimate can for wiring and debugging engineering; If use wireless system just can avoid the problems referred to above, needn't be subjected to space constraint, have bigger degree of freedom within the specific limits, particularly in the time will changing the position that battery pack puts, more can embody its characteristic simply and easily.
(3) favorable expandability
The extendability of wired system than wireless system a little less than, if increase new battery pack, also need rewiring, and wireless system only need increase wireless telecommunications system to this battery pack and get final product.
(4) communication module adopts little emissive power, has only 10mW, has high receiving sensitivity, and the receiving sensitivity under 9600 baud rate speed reaches-115db;
Description of drawings
Fig. 1 is the utility model accumulator on-line monitoring system structural drawing.
Fig. 2 is the utility model accumulator on-line monitoring system communication structure figure.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
The single accumulator series connection of N needs monitoring forms a battery pack among Fig. 1, incorporates in the battery-operated group again.The data acquisition module of each accumulator need comprise the detection module of monitoring this accumulator voltage, select a data acquisition module to add the detection module of this battery pack series current of monitoring in each battery pack, again the status signal that collects is sent into data processor and carry out data processing, send into again and comprised RF radio circuit, the isostructural radio-frequency communication module of antenna and master station and communicate.
Fig. 2 has provided accumulator on-line monitoring system communication structure figure in the utility model.An accumulator is a communication node, and N accumulator formed N communication node, all returns by master station and controls.This one much more main from the communication mechanism that adopts of communication system poll is arranged and reports mode.Each communication node is just uploaded the status information of this node at regular intervals to master station, master station sends the data upload order according to each address of node order to each partial node.This order has node address, has only the node of this address to return the status information of oneself, and other nodes maintain the original state.Each node is only just opened communication module when entering transmission work, all sending module is closed at ordinary times, does not carry out the reception and the transmission of any data.Such communication mechanism can reduce or stop the collision problem of communication data, and the reliability of data communication is the basis of the normal collection of assurance system.
Part of data acquisition is responsible for the collection and the data processing of each quantity of state of accumulator, carries out data communication by communication part and master station again.Part of data acquisition is made up of current sensor, voltage sensor, signal acquisition circuit, DSP digital processing unit etc.Sensor and signal acquisition circuit are responsible for the collection of quantity of state, again the signal that collects are sent into the DSP digital processing unit and carry out data processing, obtain the data that master station needs.Communication part partly is made up of RF radio circuit, antenna etc.By RF radio frequency transmission Monitoring Data, the no datat transmission line, antenna is suitably drawn according to the environment for use of module.Master station also adopts wireless installation, receives and send communication instruction and data.Adopt this system states such as monomer terminal voltage, electric current and internal resistance of all accumulators of on-line monitoring transformer station simultaneously.
An accumulator adopts a data acquisition module.All with the address of 2 bytes, node address is used for the recognition to the transmission data to all accumulator data modules, is equivalent to the accumulators numbering, is easy to master station identification.Allow always to have 65535 node addresss, just allow 65535 accumulator connecting systems, meet the requirement of transformer station fully accumulator quantity.At each and link in the battery pack of system, each accumulator all is with a data acquisition module, and this module is responsible for gathering the terminal voltage of single accumulator.In this battery pack, the current sensor of the data acquisition module of accumulator adding is therein gathered the series current of this battery pack.For the ease of the different status signal amount of communication system identification, at the data adding identifier of each status signal.
Communication Control mechanism between accumulator and the master station is described below:
(1) polling mechanism.Each accumulator node is every t once sampling second status signal, but status signal do not sent to master station, but is kept in the internal memory.Master station adopts polling mode, every the sequence of addresses of certain time interval Δ T according to each partial node, or the node sequence of computer control system configuration, send the data upload order to partial node.Communication band address sends, and has only the identical node return state signal in address, and other nodes maintain the original state.When system has N partial node when carrying out poll, total status data update time is N * Δ T.Adopt polling mechanism, can effectively prevent the communication data collision.
(2) report mechanism.The accumulator communication node works on power, and is in accepting state, and after master station sent startup command, all partial nodes entered operating conditions.Through after the suitable time-delay, the status signal of once sampling, and send to master station is every N * Δ T transmission one secondary data of sample second.Just open communication module when only entering transmission work, all sending module is closed at ordinary times, do not carry out the reception and the transmission of any data.The cycle data collection and the transmission of node, the middle time-delay employing correction P checking algorithm relevant with node address can guarantee that other nodes do not send when a node carries out the data transmission, avoids the problem of data collision.
The utility model be one one master many from system, comprise the master system that the lower computer system be made up of accumulator and master station are formed.Wireless module adopts the RF frequency of the ISM (industry, science and medical treatment) of ITU (International Telecommunications Union (ITU)) appointment.The wireless transport module that uses meets European ETSI (EN300-220-1 and EN301-439-3) and FCC15.247/15.249 authentication specification, satisfies wireless control requirement, need not the demand frequency occupancy permit.Module adopts high-performance fundamental frequency crystal oscillator, meets the request for utilization of industrial environment, and the wireless telecommunications part is based on the FSK/GFSK modulating mode, and the actual bit error rate is 10 -5~10 -6
Reasonably communication modes not only can guarantee reliability, rapidity, the high efficiency of data communication, can also reduce node power consumption under the prerequisite that ensures communication, prolongs node service time.

Claims (3)

1. DC screen of transformer substation is with intelligent battery state wireless monitoring device, partly form by part of data acquisition and wireless telecommunications, wherein part of data acquisition is become by data acquisition module, current sensor, signal acquisition circuit, DSP bank of digital signal processors, it is characterized in that: the wireless telecommunications part is made up of RF radio circuit, antenna two parts; Relation between the each several part is: connect a data acquisition module on each accumulator, accumulator is composed in series battery pack, in the data acquisition module of one of them accumulator of each battery pack, add current sensor, data acquisition module is connected with signal acquisition circuit respectively with current sensor, signal acquisition circuit connects the DSP digital signal processor, the DSP digital signal processor connects the RF radio circuit, and the RF radio circuit sends the data to master station by antenna.
2. DC screen of transformer substation as claimed in claim 1 is characterized in that with intelligent battery state wireless monitoring device: data acquisition module is integrated voltage sensor, adopt compact design, and be installed in the monitoring point of each accumulator nearby.
3. DC screen of transformer substation as claimed in claim 1 intelligent battery state wireless monitoring device, it is characterized in that: standard configuration 10cm antenna is partly adopted in wireless telecommunications, and antenna is fixed on the RF radio circuit.
CN200920228195XU 2009-09-18 2009-09-18 Intelligent device for wirelessly monitoring state of storage batteries used for direct current screen of transformer substation Expired - Fee Related CN201508408U (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102529742A (en) * 2012-01-18 2012-07-04 见发先进科技股份有限公司 Control system and device of battery exchange station
CN102638062A (en) * 2011-02-12 2012-08-15 中国人民解放军总后勤部建筑工程研究所 Modular combined wind-light-diesel combined power supply system
CN102778644A (en) * 2012-07-20 2012-11-14 汕头大学 Device and method for detecting performance of solar illuminating system
CN103401304A (en) * 2013-07-31 2013-11-20 成都电业局双流供电局 Intelligent operation power supply switching networking system with direct current contactor
CN109283471A (en) * 2018-11-23 2019-01-29 重庆知遨科技有限公司 A kind of battery radio patrol checking method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102638062A (en) * 2011-02-12 2012-08-15 中国人民解放军总后勤部建筑工程研究所 Modular combined wind-light-diesel combined power supply system
CN102638062B (en) * 2011-02-12 2014-11-19 中国人民解放军总后勤部建筑工程研究所 Modular combined wind-light-diesel combined power supply system
CN102529742A (en) * 2012-01-18 2012-07-04 见发先进科技股份有限公司 Control system and device of battery exchange station
CN102778644A (en) * 2012-07-20 2012-11-14 汕头大学 Device and method for detecting performance of solar illuminating system
CN103401304A (en) * 2013-07-31 2013-11-20 成都电业局双流供电局 Intelligent operation power supply switching networking system with direct current contactor
CN109283471A (en) * 2018-11-23 2019-01-29 重庆知遨科技有限公司 A kind of battery radio patrol checking method

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100616

Termination date: 20170918

CF01 Termination of patent right due to non-payment of annual fee