CN101907646A - Wireless long-distance digital alarm meter reading terminal and system for monitoring metering fault by null-balance method - Google Patents
Wireless long-distance digital alarm meter reading terminal and system for monitoring metering fault by null-balance method Download PDFInfo
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Abstract
The invention relates to a wireless long-distance digital alarm meter reading terminal and a system for monitoring metering fault by a null-balance method, and comprises a wireless long-distance digital alarm meter reading terminal U2, electric energy meters U1 and U3 for monitoring metering fault by the null-balance method and a center transceiver host, wherein the electric energy meters comprises a common electric energy meter U1 and a circuit U3 for monitoring metering fault by the null-balance method, wherein the electric energy meter terminal principle formed by the U1, the U2 and the U3 is shown in an abstract figure1; and in the invention, the principle of monitoring metering fault by the null-balance method is used for judging the faults such as poor contact, electric larceny and the like of a secondary circuit, integrates the metering faults monitoring, guard against theft, overtemperature alarm and digital meter reading into a whole and is applied to the automation of 10kV line switching room.
Description
Technical field
The invention belongs to electric energy metrical monitoring wireless alert applications field, monitoring metering fault electric energy meter and radio alarming circuit that " null-balance method monitoring metering fault principle " of the present invention for using and enforcement circuit are developed into, add digital temperature monitoring warning, antitheft monitoring, alarming, other warning (reporting to the police) observation circuit as unpacking, the multi-functional monitoring metering fault wireless data sending warning ammeter terminal that fuses into one, the wireless long-distance digital that constitutes with center transmitting-receiving main frame passes alarm meter reading terminal and system.Be mainly used in 10kv circuit power distribution station.
Background technology
Platform district, rural transformer metering fault, stealing problem occur often at present, manually search waste of manpower of metering fault hidden danger and poor effect, do not have effective metering fault real-time monitoring alarming terminal and system.
The monitoring metering fault aspect, inventor's domestic initiation in one's early years is developed into " automatic digital type electric energy metrical on-line detector " gain the national patent, patented claim day: October 26 nineteen ninety, application number: 90222674.6, certificate number: No. 68612; Further improve precision and be developed into " electric power meter overall operation check meter " gain the national patent, patented claim day: on May 29th, 1998, the patent No.: ZL98214920.4, split that domestic electric energy metrical fault does not have a power failure, do not take out stitches, on-the-spot online detection and check new tool, having solved metering fault hidden danger and manually searched difficult problem, now has been to search the indispensable instrument of metering fault hidden danger after applying.Patrol and examine and measure fault and exist in the platform district one by one but also need manually carry instrument, can not in time find metering fault hidden danger automatically.
There was electric energy meter to increase anti-stealing electricity function in recent years, but mainly was single-phase electronic energy meter.Its principle is: single-phase table increases the neutral line current input signal, live wire electric current line and neutral line current line are inserted electric energy meter simultaneously, (the electric current line is in the off-balancesheet short circuit when electric current shunting stealing is arranged on the live wire, the part electric current is not flowed through in the table), live wire current input signal amplitude will be different with neutral line current signal input range, what electric energy computation chip was used in the table is the anti-stealing electricity function chip, the two paths of signals input end is arranged on the chip, the accumulative total electric flux prevents to shunt few quantity calculation automatically by the big calculating of secondary degree in the chip.And the three-phase and four-line electric energy meter can not detect shunting stealing fault with the method, because of neutral line current under the normal condition and three-phase firewire current amplitude unequal, usually three-phase four-wire system three-phase firewire (380V) electric current not necessarily equates, neutral line current is uncertain, and difference is very big sometimes.Neutral line current may be zero when the three-phase firewire electric current equates, neutral line current is bigger when three-phase current unbalance, and is also bigger than certain live wire electric current sometimes, and also may be zero under certain phase current non-failure conditions.So fault detects such as three-phase kilowatt-hour meter secondary circuit and external shunt stealing are difficulty, does not still have effective monitoring method and product at present, have only the three-phase voltage of differentiation amplitude, detect decompression.As for the current return fault, the measuring three-phase current amplitude that has is differentiated the three-phase current unbalance degree, but all can not effectively judge and have or not secondary circuit failure and electric current shunting fault.
The multifunctional electric energy meter that has at present can be measured voltage phase shortage, three-phase current unbalance degree, electric current and voltage phase sequence wrong problem, and to current transformer ratio mistake, interior shunting, secondary circuit loose contact, short circuit, open circuit, shunt the metering fault that stealing etc. causes, can not measure at present.
If existing Measuring and testing instrument core circuit is attached to batch meter, the cost height is infeasible, so the monitoring principle method and the enforcement circuit that need research to make new advances add in batch meter or the electric energy meter, the monitoring and metering fault alarm can in time be found metering fault hidden danger in real time.
Each 10KV circuit power distribution station power distribution automation not development as yet under the electric power system electric substation at present, reason is the situation complexity, does not have good development model.
The present present situation of the transformer anti-theft that the present invention adds, overtemperature alarm aspect is: agricultural Pai Tai district send during irrigation and drainage, have a power failure during slack season, the stolen incident of transformer often appears during this, do not build full monitoring and alarm protection system,, fail to apply though the transformer anti-theft warning system has the part line applications, reason is a function singleness, practicality is little, and cost performance is low, and the networking expense is high-leveled and difficult to carry out; Transformer overtemperature overload burns out often has generation, someone to manufacture experimently the temperature monitoring warning system, but also fails to carry out using, and reason is as burglar alarm; Manual metering waste of manpower, wireless long-distance meter-reading have application example in recent years, but also fail finely carry out to use at the 10KV circuit, and reason is still function singleness, the expense height, and cost performance is low, fails to carry out using.Have the expert to think: the 10KV circuit is looked into line loss reducing, and saving energy and decreasing loss is the leading of development and application, await the 10KV distribution line automated wireless monitoring net development model application success of perfect in shape and function after, these are antitheft, overtemperature, checking meter solves as additional function.
Summary of the invention
The inventor sums up in recent years the electric energy metrical check meter and applies experience and rig-site utilization experience, further researched and proposed " null-balance method monitoring metering fault principle ", grind and try out the enforcement circuit, be installed in batch meter or the electric energy meter, increase the neutral line current mutual inductor, effectively monitoring current mutual inductor ratio mistake, internal short-circuit shunting, secondary circuit loose contact, short circuit, open circuit, shunt the metering fault that stealing etc. causes, also can monitor electric energy meter inside micro current transformer and convertor circuit fault.Enforcement circuit with " null-balance method monitoring metering fault principle " development adds electric energy meter, constitute " null-balance method monitoring metering fault electric energy meter " of the present invention, add " transceiver that wireless digital transmits warning and data " again and (also can transmit ammeter data, be called for short wireless data sending warning transceiver), constitute " null-balance method monitoring metering fault wireless long-distance digital passes warning electric energy meter terminal ", form " null-balance method monitoring metering fault wireless long-distance digital passes the alarm meter reading supervisory system " with center wireless receiving and dispatching main frame and antenna; Wireless data sending warning transceiver also can not add electric energy meter, and the housing of packing into separately is called: wireless long-distance digital passes the alarm meter reading monitor terminal, with electric energy meter and be loaded in the batch meter.
Hereinafter set forth each several part principle, structure and implementation method respectively.
" null-balance method monitoring metering fault principle " that the present invention proposes its essence is: the vector and the rule that equals negative sense neutral line current vector that have proposed three-phase current, and propose to differentiate the method for three-phase current metering fault, principle formula: Ia+Ib+Ic=-IO according to this rule; Or Ia+Ib+Ic+IO=0; Ia, Ib, Ic, IO is the current phasor at band phasing degree, form by current amplitude and phasing degree, method of discrimination: zero balancing vector principle is seen accompanying drawing 4 explanations, normal condition is electric current total vector and still be zero after current transformer is transformed into secondary current next time, if current transformer does not have faults such as inner electric leakage or short circuit, and threephase current transformer no-load voltage ratio unanimity, the three-phase secondary current vector that enters three-phase electric energy meter adds the neutral line current vector and should keep zero balancing, if insert the secondary current of electric energy meter shunting is arranged, short circuit, open circuit, loose contact, faults such as phase place wrong, will break the zero balancing rule that three-phase current adds Zero-phase current, according to total vector and amplitude and phase judgment shunting or leakage current and place phase line.With this principle method, the monitoring metering fault circuit of developing, can the three-phase current shunting of invalid monitoring and metering loop, short circuit, open circuit, tie and touch metering faults such as bad, phase place wrong, accompanying drawing 4 explanations are seen in the diagram of vector principle.
Null-balance method monitoring metering fault circuit of the present invention, structural principle is seen accompanying drawing 2, it is by three-phase current signal amplifier and mould/number conversion circuit ZA, ZB, ZC; Neutral line current signal transformation, amplification, mould/number conversion circuit ZO; Current phasor treatment circuit YS; Metering fault judging circuit PB; The I2C communication port; Form, obtain three-phase voltage fault distinguishing signal by the I2C interface from ammeter metering single-chip microcomputer, metering fault judging circuit PB differentiates the three-phase current fault according to null-balance method monitoring metering fault principle, through port IG end output current fault-signal, port UG end output voltage fault-signal, its connection relation is: current signal amplifier and mould/number conversion circuit ZA, ZB, ZC input signal IA, IB, the IC electric energy meter three phase metering signal end that is connected in parallel respectively, ZO input signal IO connect the secondary current IO of neutral line current mutual inductor HO output; The rig-site utilization principle sees shown in the accompanying drawing 3 that it is to have increased the neutral line current mutual inductor with common secondary circuit device difference of past.
" null-balance method monitoring metering fault principle " according to the present invention with grind the observation circuit that tries, install additional and the ordinary electronic electric energy meter, be developed into null-balance method monitoring metering fault electric energy meter, replace existing common electric energy meter, monitoring and metering plant failure type in real time, and by wireless long-distance digital biography alarm meter reading terminal, platform area code and fault type coding are sent to alarm center, center transmitting-receiving main frame decodes fault type, platform area code sending computer displayed record, and note and Advise By Wire person liable, " electric power meter on-line detector or check meter " scene that timely band has been carried out is checked and is confirmed to handle.
" null-balance method monitoring metering fault wireless long-distance digital pass alarm meter reading terminal and system " of the present invention, system principle such as Fig. 5, it mainly is by null-balance method monitoring metering fault electric energy meter; Wireless long-distance digital passes the alarm meter reading monitor terminal; Center transmitting-receiving main frame and antenna are formed, its principle of work is: after null-balance method monitoring metering fault electric energy meter DB1...DBn of the present invention works on power, monitor the balance of three-phase current and neutral line current vector in real time, whether differentiate has metering fault, if then analysis of failure type is arranged, be sent to wireless data sending alarm meter reading monitor terminal through interface, through in-line coding and wireless transceiver circuit antennas ATC1...ATCn transmitted radio signal; Center antenna ATZ received signal is sent center transmitting-receiving main frame ZJ, and demodulating and decoding goes out terminal number and malfunction coding type, crosses the antenna alert signal of transmitting messages, simultaneously sending computer show, storage; Non-failure conditions is regularly sent out test signal one time following every day, and the monitoring of expression terminal transmits normal, and test signal is sent out in utilization can pass the current table code data of ammeter or other data back, as table sign indicating number, temperature, power etc., realizes the line loss statistics.Its connecting relation is: current failure monitoring electric energy meter connects with wireless long-distance digital biography alarm meter reading monitor terminal through connecting port or terminal, wireless long-distance digital passes the alarm meter reading monitor terminal and connects antenna, center antenna is through feeder line connection center transmitting-receiving main frame, monitoring metering fault electric energy meter that a plurality of structures are identical and wireless long-distance digital pass the alarm meter reading monitor terminal through antenna, by radio signal link center transmitting-receiving main frame.Terminal is fused into prior art, and transformer anti-theft and overtemperature monitoring input interface is arranged, have to steal the feelings alert signal of in time transmitting messages, and structural refinement, the cost performance height is fit to the practicality of platform district.
Null-balance method monitoring metering fault wireless long-distance digital of the present invention passes alarm meter reading terminal and system.Functional interface circuit such as transformer anti-theft monitoring, the monitoring of transformer temperature monitoring, the unpacking monitoring of batch meter, transformer platform district electrical quantity data transmission, drive controlling are fused in the comprehensive refining of its wireless long-distance digital biography alarm meter reading monitor terminal part, to report to the police and data wireless be sent to central host, perfect in shape and function cost performance height forms 10KV distribution line automation development pattern for selecting for use.Above-mentioned malfunction monitoring ammeter terminal regularly reports electrical quantity to comprise: voltage, electric current, power, power factor, active energy, reactive energy, freeze active energy, freeze parameter such as reactive energy, for regular line loss statistics provides data.
Null-balance method monitoring metering fault wireless long-distance digital of the present invention passes alarm meter reading terminal and system, in the rig-site utilization, the platform district has a power failure slack season for a long time during the agricultural drainage and irrigation, be the normal monitoring, alarming of energy, add solar cell and accumulator jar, dynamic power supply and solar powered automatic switchover, but after the power failure still long term monitoring report to the police and be to upload test signal and data surely, guarantee the line loss statistical accuracy; Outage has in dormancy electricity-saving function and wireless awakening checks current table sign indicating number.
The communication channel of wireless remote numeral transfer system of the present invention: adopt GSM/GPRS/RF combined type wireless communication networks, middle distance adopts the RF radio frequency to transmit (this is different from the low coverage wireless remote control and wakes up), adopts SMS (Short Messaging Service) GSM or wireless Internet access GPRS to transmit at a distance.
Wireless long-distance digital of the present invention passes the alarm meter reading monitor terminal, and structural principle such as Fig. 6 is characterized in that: by wireless remote transceiver boards CSFB; Remote control dash receiver XJSB closely; Digiplex XYKQ; Single Chip Microcomputer (SCM) program controller KZQ; Electric current and voltage failure warning input terminal IG, UG; Data communication end A, B; Alert detecting input port B 1...Bn; Control output end mouth K1...Kn; Direct supply; Dual-mode antenna; Power supply input plug receptacle; The energy storage storage battery; Storage battery input plug receptacle; Solar panel; Inner direct current regulation circuit; Casing constitutes.Its connection side's examination is: direct supply connects power supply input plug receptacle, and alert detecting input port B 1...Bn connects the corresponding input end of Single Chip Microcomputer (SCM) program system device respectively; Control output end mouth K1...Kn connects the switch control output end of Single Chip Microcomputer (SCM) program system device correspondence respectively; RS485 data communication end A, B connect the single-chip microcomputer programming controller through the RS485 chip; Closely remote control dash receiver output terminal connects single-chip microcomputer programming controller input port; Wireless remote transceiver boards input/output terminal connects single-chip microcomputer programming controller I/O respectively, and inner direct current regulation circuit output connects the each several part power input, and the high-frequency signal input/output terminal receives sends out antenna; Solar panel connects storage battery, and storage battery connects the storage battery socket through tie and plug; Digiplex and external direct supply independently are placed in outside the casing, and all the other each several parts are installed in the casing, constitute wireless long-distance digital and pass the alarm meter reading monitor terminal.
Null-balance method monitoring metering fault electric energy meter part of the present invention, circuit theory such as Fig. 1 is characterized in that: by the sub-UA of three-phase and four-line voltage input end, UB, UC, IO; Three-phase current input terminal IA, IB, IC; Neutral line current input terminal IO1, IO2; Current/voltage isolated converter and electric energy computation chip and button display circuit part; The current failure warning lead-out terminal IG and the pilot lamp LI that increase; Voltage failure warning lead-out terminal UG and pilot lamp LU; Null-balance method monitoring metering fault circuit constitutes.Its connecting relation is that electric current and the voltage signal that three-phase current and three-phase voltage are exported by isolated converter connects the computation chip input end respectively, connect current failure observation circuit corresponding input end simultaneously respectively, two neutral line current input terminal IO1, IO2 meet fault monitoring circuit neutral line current input end IO, the fault-signal OUT of current failure observation circuit output connects the current failure pilot lamp, meets current failure warning lead-out terminal IG through isolating output device output current fault-signal simultaneously; The no-voltage fault signal that computation chip is differentiated output connects the voltage failure pilot lamp, meets voltage failure warning lead-out terminal UG through isolating output device output voltage fault-signal simultaneously.Its version is to add null-balance method monitoring metering fault plate and two zero (mutually) line current input terminals and fault alarm lead-out terminals on common three phases electronic energy meter, RS485 interface and fault alarm pilot lamp constitute null-balance method monitoring metering fault electric energy meter.
Transmitting-receiving host machine part in center of the present invention, circuit theory such as Fig. 7 is characterized in that: by wireless remote transceiver boards ZSFB; Single Chip Microcomputer (SCM) program controller JMKZQ; RS232 data communication interface or USB interface; Direct supply WDC; Inner mu balanced circuit DCWYQ; Dual-mode antenna AT; Power supply input plug receptacle ZC1; Casing constitutes.Its connection side's examination is: direct supply joining power input plug receptacle, and the RS232 data communication interface connects the single-chip microcomputer programming controller through the Transistor-Transistor Logic level conversion block; Wireless remote transceiver boards input/output terminal connects single-chip microcomputer programming controller I/O respectively, and wireless remote transceiver boards high frequency receiving and transmitting signal connects dual-mode antenna through high-frequency feed line, and inner direct current regulation circuit output connects the each several part power input; Direct supply has built-in and external connects structure for two kinds, and the external direct supply is independent outside casing, and all the other each several parts are installed in the casing; RS232 data communication interface or USB interface connect general-purpose computer.
Monitoring metering fault electric energy meter of the present invention and wireless long-distance digital pass the alarm meter reading monitor terminal and are assembled in the housing, " null-balance method monitoring metering fault wireless long-distance digital passes warning electric energy meter terminal " that constitutes, be called for short malfunction monitoring ammeter terminal, it is characterized in that: described null-balance method monitoring metering fault electric energy meter enlarges housing, described wireless long-distance digital is passed the alarm meter reading monitor terminal partly to be assembled in the housing, connecting relation is that the joint Terminal between two parts is removed, use instead on connector connection or the circuit board and directly connect, the inner composition of two parts and other structure are constant, and circuit theory is still as Fig. 1 (a).
Description of drawings
The ammeter terminal integrated circuit structure principle chart that Fig. 1 in the accompanying drawing 1 (a) is integrated, Fig. 1 (b) is the synoptic diagram that null-balance method monitoring metering fault electric energy meter and wireless data sending warning transceiver divide two bodies, is null-balance method monitoring metering fault electric energy meter circuit part in the frame of broken lines J1 among Fig. 1 (b); For wireless long-distance digital passes alarm meter reading monitor terminal part, it adds connection terminal by wireless data sending warning transceiver circuit part U2 in the frame of broken lines J2, and the split casing constitutes.U2 partial interior structure is seen shown in the accompanying drawing 6.
UA, UB, UC, UO are three-phase and four-line voltage input end among Fig. 1; IA, IB, IC are the three-phase current input terminal; IO1, IO2 are zero line (phase) current input terminal; U1 is electric energy computation chip and button display circuit part; U3 is a three-phase current fault monitoring circuit part; U2 is that wireless long-distance digital passes warning transceiver part; UG is a three-phase voltage no-voltage fault lead-out terminal; IG is a three-phase current malfunction monitoring lead-out terminal; LU, LI are respectively the voltage and current malfunction indicator lamp; B1...Bn is outer input end taking alarm such as high temperature, antitheft vibration signal, infrared acquisition signal, and is the amount doesn't matter according to different field requirement and the outer warning input terminal of different type of machines; K1...Kn is the remote switch control signal output ends, and is the amount doesn't matter according to the application requirements lead-out terminal; AT is a dual-mode antenna; A, B are the serial communication interface terminal.
Accompanying drawing 2 is a null-balance method monitoring metering fault circuit principle structure block diagram, and among Fig. 2, IA, IB, IC are respectively from A, B, the C three-phase secondary current of mutual inductor input, and IO is the secondary current from the input of neutral line current mutual inductor; ZA, ZB, ZC, ZO are respectively the mould/number vector converter at band phasing degree; YS vector calculus device; PB is the Fault Identification part; IG is the current failure output terminal, and UG is the voltage failure output terminal.
Fig. 4 is null-balance method monitoring metering fault principle vector analysis figure, and IA, IB, IC are respectively the three-phase current vector of micro mutual inductor conversion in showing among Fig. 4; IO and neutral line current vector; IE is an error vector, wait IA+IB+IC+IO vector and.Fig. 4 divides four kinds of its principles of situation analysis, and Fig. 4 a is the current phasor figure under the three-phase balance non-failure conditions, IO=0, and vector and IE=0 declare non-fault; Fig. 4 b is a three-phase balance, and IA has Fen Liu ﹠amp; Current phasor figure under the IA failure condition, IO=0, IE=-$IA, declaring A has current failure mutually; Fig. 4 c is a three-phase current unbalance, does not have the current phasor figure under the shunting failure condition, and IO does not wait zero, and vector and IE=0 declare non-fault; Fig. 4 b is that three-phase current unbalance B phase secondary current has electric leakage or shunting ﹠amp; Current phasor figure under the IB situation, IO does not wait 0, IE=-﹠amp; IB, declaring has fault in the B phase.Schematic diagram explanation thus: no matter three-phase current balance whether, if no mutual inductor ratio problem or secondary current short circuit, open circuit, divide flow problem, can not differentiate fault is arranged, if mutual inductor ratio problem or secondary current short circuit are arranged, open circuit, divide flow problem, just have the IE vector and do not wait zero, which the metering current fault and fault order of severity mutually can differentiate according to phase place and the amplitude of vector IE is.
Fig. 5 is the whole theory diagram that terminal and central host are formed the wireless data sending warning system.DB1...DBn is several null-balance method monitoring metering fault electric energy meters among the figure; ZD1...ZDn is several wireless data sending alarm meter reading terminals; ATC1...ATCn is several corresponding terminal antennas, and ATZ is a master machine antenna; ZJ is the center transceiver.
Fig. 6 is that the wireless long-distance digital of Fig. 1 passes the circuit structure schematic diagram among the alarm meter reading monitor terminal U2, among Fig. 6 B1...Bn be antitheft, overtemperature, other warning input terminal such as unpack; K1...Kn is control output end; A, B are RS485 data-interface terminal; IG, UG are electric current, voltage failure input terminal; SFDL is the serial data control circuit; KZQ is alert detecting, coding, data transmit-receive recognition control circuit; CSFB is a wireless transceiver circuit; XJSB low coverage wireless remote control wakes dash receiver up; XYKQ is a low coverage wireless remote control handle; DCWYQ is the terminal inner D.C. regulated power supply; DP is rechargeable battery or storage battery; CDKZQ is a charge controller, sufficient automatic stop function; GVDY is a solar-energy photo-voltaic cell; WDC is the isolated DC power supply, elementaryly connects interchange and becomes low-voltage direct for the terminal electricity consumption through isolated variable.
Fig. 7 is a center wireless receiving and dispatching main machine structure schematic diagram.AT is an antenna among Fig. 7; ZSPB is a center high frequency transmission circuit; PDKZ channel automatic switching control circuit; JMKZQ center machine decoding and coding master controller; RS232 is an interface circuit; XSJL is for showing, store computer; DCWYQ is an interior voltage-stabilized power supply; WDC is for exchanging isolated variable direct supply piece; CZ1 is an external electric supply socket; The CZ2 outer power plug.
Embodiment
Use " null-balance method monitoring metering fault principle " of the present invention and develop the enforcement circuit, be installed in the common three-phase electronic electric energy meter, constitute null-balance method monitoring metering fault electric energy meter and be installed in the batch meter, add a neutral line current mutual inductor in the application,
Current failure monitoring electric energy meter that a plurality of structures are identical and wireless long-distance digital pass alarm meter reading monitor terminal (or wireless long-distance digital passes the warning transceiver), form null-balance method monitoring metering fault wireless long-distance digital with center transmitting-receiving main frame and host computer computer and pass the alarm meter reading system, its system's theory of constitution such as accompanying drawing 5, the current failure monitoring electric energy meter of integration and wireless long-distance digital pass the alarm meter reading monitor terminal and implement circuit structure such as accompanying drawing 1 (a), its connecting relation is: the monitoring metering fault signal output terminal IG on the electric energy meter, UG and RS485 communication port A, the B end connects the corresponding terminal that wireless long-distance digital passes the alarm meter reading monitor terminal respectively by tie; The input interface terminal B1...Bn of line remote data transmission alarm meter reading monitor terminal connects on-the-spot each alert detecting senser element; Its output interface terminal K1...Kn connects field control relay or switching point; The radio frequency transceiver antenna connects the coaxial antenna feeder line, the dual-mode antenna AT outside the feeder line fishing box.Center transmitting-receiving main frame band radio-frequency antenna interface and signal input output interface; Its radio-frequency antenna interface connects dual-mode antenna AT through high-frequency feed line, its signal input output interface connects through order wire and is used to show serial port or the USB mouth of storing computer, the computer that is used to show storage is installed supporting monitoring display and recording storage software with general purpose PC computer or the high industrial computer of reliability in the machine.
Split type wireless long-distance digital passes the alarm meter reading monitor terminal, circuit structure such as Fig. 6, and its architectural feature is: by wireless remote transceiver boards CSFB; Low coverage remote control dash receiver XJSB; Digiplex XYKQ; Single Chip Microcomputer (SCM) program Kong system device KZQ; Electric current, voltage failure warning input terminal IG, UG; Data communication end A, B; Monitoring, alarming input port B 1...Bn; Control output end mouth K1...Kn; Direct supply WDC; Emitting antenna AT; Power connector CZ1, CZ2; Dc energy storage storage battery DP; Solar panel GVDY; Inner direct current regulation circuit DCWYQ; Casing constitutes.Its connection side's examination is: direct supply connects power supply input plug receptacle, and switch alert detecting input port B 1...Bn connects each corresponding input end of Single Chip Microcomputer (SCM) program Kong system device respectively; Control output end mouth K1...Kn connects the switch reference mark of Single Chip Microcomputer (SCM) program Kong system device correspondence respectively; RS485 data communication end A, B connect Single Chip Microcomputer (SCM) program Kong system device through RS485; Low coverage remote control dash receiver output terminal connects Single Chip Microcomputer (SCM) program Kong system device input port; Wireless remote transceiver boards input/output terminal connects Single Chip Microcomputer (SCM) program Kong system device I/O respectively, and inner direct current regulation circuit output connects the each several part power input; Solar panel connects through charge controller and connects storage battery, and storage battery connects internal voltage regulator through tie and plug; Digiplex and external direct supply are independent, and all the other each several parts are installed in the casing outside casing, constitute wireless long-distance digital and pass the alarm meter reading monitor terminal.
PDKZ channel automatic switching control circuit; JMKZQ center machine decoding and coding master controller; RS232 is an interface circuit; XSJL is for showing, store computer; DCWYQ is an interior voltage-stabilized power supply; WDC is for exchanging isolated variable direct supply piece; CZ1 is an external electric supply socket; The CZ2 outer power plug.
Transmitting-receiving main frame in center of the present invention, it implements circuit structure principle such as Fig. 7, and its inner structure is: by emitting antenna AT; Center high frequency transmission circuit plate ZSFB; Channel automatic switching control circuit PDKZ: center machine decoding and coding master controller JMKZQ; Data communication interface circuit RS232 or USB interface; Direct supply piece WDC; Interior voltage-stabilized power supply DCWYQ; Power supply input plug-in unit CZ1, CZ2; Casing constitutes.Its connection side's examination is: direct supply connects power supply input connector, and the RS232 data communication interface connects Single Chip Microcomputer (SCM) program Kong system device through the Transistor-Transistor Logic level conversion block; Wireless remote transceiver boards input/output signal termination center machine decoding and coding master controller JMKZQ, inner D.C. regulated power supply DCWYQ output connects the each several part power input; Isolated DC power supply WDC has built-in and external connects structure for two kinds, the external direct supply is independent to connect internal voltage regulator through unitor CZ1, CZ2 outside casing, all the other each several parts are installed in the casing, constitute the center transmitting-receiving main frame that wireless long-distance digital passes the alarm meter reading monitoring terminal system.
Monitoring metering fault electric energy meter of the present invention, it implements circuit structure principle such as Fig. 1, it is characterized in that by three-phase voltage input terminal UA, UB, UC; Three-phase current input terminal IA, IB, IC; Current/voltage isolated converter and electric energy computation chip and button display circuit part; The current failure warning lead-out terminal IG and the pilot lamp LI that increase; Voltage failure warning lead-out terminal UG and pilot lamp LU; The sub-IO1 of two zero lines (phase) current input terminal, IO2; Three-phase current fault monitoring circuit part constitutes.Its connecting relation is that electric current and the voltage signal that three-phase current and three-phase voltage are exported by isolated converter connects the computation chip input end respectively, connect three-phase current fault monitoring circuit corresponding input end simultaneously respectively, the sub-IO1 of two zero lines (phase) current input terminal, IO2 connect three-phase current fault monitoring circuit neutral line current input end, the current failure signal of three-phase current fault monitoring circuit output connects the current failure pilot lamp, meets current failure warning lead-out terminal IG through isolating output device output current fault-signal simultaneously; Computation chip is differentiated the no-voltage fault signal of output through the three-phase current fault monitoring circuit, connects the voltage failure pilot lamp, through isolating output device output voltage fault-signal, meets voltage failure warning lead-out terminal UG simultaneously.Its version is to add null-balance method monitoring metering fault circuit U 3 and two neutral line current input terminal IO1, IO2 and fault alarm lead-out terminal IG, UG, RS485 Interface Terminal A, B and fault alarm pilot lamp on original common three phases electronic energy meter.
Monitoring metering fault electric energy meter and wireless long-distance digital that wireless long-distance digital of the present invention passes alarm meter reading monitor terminal and system pass integrated being installed in the casing (or watchcase) of alarm meter reading monitor terminal, constitute " wireless long-distance digital passes monitoring alarm ammeter terminal " of structure letter refining.Its structure is: pass the alarm meter reading monitor terminal by above-mentioned wireless long-distance digital and enlarge housing, with common electric energy watch circuit, metering drum barrier observation circuit, electric current and voltage input terminal and neutral line current input terminal are installed in the shell, remove split type metering fault and report to the police and outreach connection terminal communicate by letter with RS485 joint Terminal and monitor terminal power input socket, constitute.485 interface lines of monitoring metering fault electric energy meter directly connect the Single Chip Microcomputer (SCM) program controller communication serial port that wireless long-distance digital passes the alarm meter reading monitor terminal, the direct linker controller failure of fault monitoring circuit output output input port.Its architectural feature is: by the sub-UA of three-phase and four-line voltage input end, UB, UC, UO; Current/voltage isolated converter and electric energy computation chip circuit; Button display screen circuit; The button display screen; Three-phase current input terminal IA, IB, IC; The sub-IO1 of two zero lines (phase) current input terminal, IO2; Metering fault warning lead-out terminal IG and pilot lamp LI and three-phase current fault monitoring circuit part; Alert detecting input port B 1...Bn; Control output end mouth K1...Kn; Direct supply; Emitting antenna; Storage battery input plug receptacle; The wireless remote transceiver boards; Low coverage remote control dash receiver; Digiplex; Single Chip Microcomputer (SCM) program Kong makes device; Inner direct current regulation circuit; The dc energy storage storage battery; Solar panel is formed.
Monitoring metering fault electric energy meter of the present invention, one of its principal character is: the circuit structure that has changed former three phases electronic energy meter, increased the Zero-phase current input terminal, current failure alarm lamp and lead-out terminal, voltage failure alarm lamp and lead-out terminal, three-phase current shunting or secondary loop current fault monitoring circuit, the electric energy meter of composition belt current malfunction monitoring can effectively be monitored out current failures such as secondary circuit and shunting.Its principal character two is: increase the long distance wireless number and pass the warning transceiver, current failure and voltage fault signal in time can be sent to alarm center by wireless remote numeral transmission transceiver.Its one-piece construction is: pass the warning transceiver by existing three phases electronic energy meter and the Zero-phase current input terminal, three-phase current fault monitoring circuit plate, current failure warning lead-out terminal and pilot lamp, voltage failure warning lead-out terminal and the pilot lamp that increase, wireless long-distance digital and formed its circuit theory such as accompanying drawing 1.The electric energy meter that the long distance wireless number passes warning transceiver and belt current malfunction monitoring is installed in the case (but also partial installation).Maintain and replace part for the convenience of the user, wireless long-distance digital passes warning transceiver and the partial installation of current failure monitoring electric energy meter, by tie current failure monitor signal in the electric energy meter and RS485 data communication interface are connected with wireless long-distance digital biography warning transceiver, structural principle is shown in accompanying drawing 1 (b).
Install this null-balance method monitoring metering fault electric energy meter terminal additional in each distribute-electricity transformer district batch meter in on-the-spot the use, for wireless signal surely leans on, antenna places outside the table case.Center configuration wireless receiving and dispatching main frame connects antenna and shows the storage computer, can constitute the monitoring, alarming kilowatt meter reading-out system, if the center free channel communication of RF, but the high antenna economization of frame communication cost connects antenna and main frame with high-frequency feed line.Each terminal can increase and joins antitheft sensing device and oily temperature sensing head as required, and the overtemperature alarm vane is realized additional function.On probation through pilot more than a year, terminal and system wireless are counted transfer performance and are surely leaned on, and work is surely leaned on.
Null-balance method monitoring metering fault wireless long-distance digital of the present invention passes the main innovate point of alarm meter reading terminal and system and looks into new establishment by Henan Province Information Institute science and technology, in November, 2008 is by Henan Province's appraisal of scientific and technological achievements, evaluation committee's expert evaluation is leading domestic level, grinds institute's novelty assessment report copy referring to appraisal of scientific and technological achievements certificate and Henan Province's letter of other documentary evidence.
Beneficial effect of the present invention: null-balance method monitoring metering fault wireless long-distance digital of the present invention passes alarm meter reading monitor terminal and system, timely monitoring and metering fault, the digital delivery fault type, be that electric current shunting fault or certain phase voltage no-voltage fault can effectively be offered an explanation, alarm controller also has other warning input port, but progress of disease depressor overtemperature alarm signal and the stolen alerting signal of transformer, with the infrared alarm identification signal of human body when the transformer, simultaneously ammeter RS485 communication interface is connected number and pass alarm controller, wireless transmission ammeter data, have the wireless long-distance meter-reading effect concurrently, realize the remote meter reading robotization, for development 10KV circuit power distribution automation provides economically viable wireless data sending terminal unit.To improving the fulgurite automatization level, the waste of economization inspection metering hidden danger manpower is looked into and is fallen current supply loss new monitoring means is provided.
Economic results in society of the present invention and Practical significance: null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention is checked meter and is supervised end and system, can in time monitor electric energy metrical fault and other fault, the patrol waste of metering fault of manpower-free, to anti-electricity-theft anti-stolen, line loss reducing, bigger Practical significance is arranged, applying has bigger economic results in society with performance, radio ammeter terminal comprehensive function is strong, easy for installation, reliable and stable, the comprehensive utilization degree height, the cost performance height, automation has big Practical significance to development 10KV distribution line.
Claims (6)
1. null-balance method monitoring metering fault wireless long-distance digital passes alarm meter reading monitor terminal and system.It is characterized in that: by the monitoring metering fault circuit of using this " null-balance method monitoring metering fault principle " development, add the ordinary electronic electric energy meter, constitute null-balance method monitoring metering fault electric energy meter; Wireless long-distance digital passes the alarm meter reading monitor terminal; Center transmitting-receiving main frame and antenna are formed, its connecting relation is: current failure monitoring electric energy meter connects with wireless long-distance digital biography alarm meter reading monitor terminal through connecting port or terminal, wireless long-distance digital passes the alarm meter reading monitor terminal and connects antenna, center antenna is through feeder line connection center transmitting-receiving main frame, monitoring metering fault electric energy meter that a plurality of structures are identical and wireless long-distance digital pass the alarm meter reading monitor terminal through antenna, by radio signal link center transmitting-receiving main frame, form wireless long-distance digital and pass the alarm meter reading supervisory system.
2. null-balance method monitoring metering fault wireless long-distance digital according to claim 1 passes alarm meter reading monitor terminal and system, the monitoring metering fault circuit of described " null-balance method monitoring metering fault principle " development is characterized in that: by three-phase current signal amplifier and mould/number conversion circuit ZA, ZB, ZC; Neutral line current signal transformation, amplification, mould/number conversion circuit ZO; Current phasor treatment circuit YS; Metering fault judging circuit PB; The disconnected sub-IG of current failure output; Voltage failure lead-out terminal UG; Three-phase current signal input end IA, IB, IC; Neutral line current signal input part IO; Three-phase voltage image data input port I2C forms, and connection relation is: the three-phase current fault fault-signal that metering fault judging circuit PB determines according to null-balance method monitoring metering fault principle connects IG output; Current signal amplifier and mould/number conversion circuit ZA, ZB, ZC input signal IA, IB, the IC electric energy meter three phase metering signal end that is connected in parallel respectively, output meets vector and circuit YS; ZO input signal IO connects the secondary current IO of neutral line current mutual inductor HO output, and the ZO output signal meets vector and circuit YS, and vector and circuit YS output connect the PB input, and increasing in the rig-site utilization has the neutral line current mutual inductor that IO is provided signal.
3. null-balance method monitoring metering fault wireless long-distance digital according to claim 1 and 2 passes alarm meter reading monitor terminal and system, described null-balance method monitoring metering fault electric energy meter is characterized in that: by the sub-UA of three-phase and four-line voltage input end, UB, UC, IO; Three-phase current input terminal IA, IB, IC; Neutral line current input terminal IO1, IO2; Current/voltage isolated converter and electric energy computation chip and button display circuit part; The current failure warning lead-out terminal IG and the pilot lamp LI that increase; Voltage failure warning lead-out terminal UG and pilot lamp LU; Null-balance method monitoring metering fault circuit constitutes.Its connecting relation is that electric current and the voltage signal that three-phase current and three-phase voltage are exported by isolated converter connects the computation chip input end respectively, connect current failure observation circuit corresponding input end simultaneously respectively, two neutral line current input terminal IO1, IO2 meet fault monitoring circuit neutral line current input end IO, the fault-signal OUT of current failure observation circuit output connects the current failure pilot lamp, meets current failure warning lead-out terminal IG through isolating output device output current fault-signal simultaneously; The no-voltage fault signal that computation chip is differentiated output connects the voltage failure pilot lamp, meets voltage failure warning lead-out terminal UG through isolating output device output voltage fault-signal simultaneously.Its version is to add null-balance method monitoring metering fault plate and two zero (mutually) line current input terminals and fault alarm lead-out terminals on common three phases electronic energy meter, RS485 interface and fault alarm pilot lamp, constitute null-balance method monitoring metering fault electric energy meter, it is to increase neutral line current input terminal IO1, IO2 and the described null-balance method monitoring metering fault of claim 2 circuit with ordinary electronic electric energy meter difference in the past, in the application if the three-phase current Current Transformer should increase the neutral line current mutual inductor is arranged.
4. null-balance method monitoring metering fault wireless long-distance digital according to claim 1 passes alarm meter reading monitor terminal and system, and described wireless long-distance digital passes the alarm meter reading monitor terminal, it is characterized in that: by the wireless remote transceiver boards; Remote control dash receiver closely; Digiplex; The Single Chip Microcomputer (SCM) program controller; Electric current and voltage failure warning input end; Data communication end A, B; The alert detecting input port
Control output end mouth K1...Kn; Direct supply; Dual-mode antenna; Power supply input plug receptacle; The dc energy storage storage battery; Storage battery input plug receptacle; Solar panel; Inner direct current regulation circuit; Casing constitutes.Its connection side's examination is: direct supply connects power supply input plug receptacle, and alert detecting input terminal B1...Bn connects the corresponding input end of Single Chip Microcomputer (SCM) program system device respectively; The sub-K1...Kn in control output end connects the switch control output end of Single Chip Microcomputer (SCM) program system device correspondence respectively; RS485 data communication end A, B connect the single-chip microcomputer programming controller through the RS485 chip; Closely remote control dash receiver output terminal connects single-chip microcomputer programming controller input port; Wireless remote transceiver boards input/output terminal connects single-chip microcomputer programming controller I/O respectively, and inner direct current regulation circuit output connects the each several part power input, and the high-frequency signal input/output terminal receives sends out antenna; Solar panel connects storage battery, and storage battery connects the storage battery socket through tie and plug; Digiplex and external direct supply independently are placed in outside the casing, and all the other each several parts are installed in the casing, constitute wireless long-distance digital and pass the alarm meter reading monitor terminal.
5. null-balance method monitoring metering fault wireless long-distance digital according to claim 1 passes alarm meter reading monitor terminal and system, and described center transmitting-receiving main frame is characterized in that: by the wireless remote transceiver boards; The Single Chip Microcomputer (SCM) program controller; RS232 data communication interface or USB interface; Direct supply; Inner mu balanced circuit; Dual-mode antenna; Power supply input plug receptacle; Storage battery input plug receptacle; Inner direct current regulation circuit; Casing constitutes.Its connection side's examination is: direct supply joining power input plug receptacle, and the RS232 data communication interface connects the single-chip microcomputer programming controller through the Transistor-Transistor Logic level conversion block; Wireless remote transceiver boards input/output terminal connects single-chip microcomputer programming controller I/O respectively, and wireless remote transceiver boards high frequency receiving and transmitting signal connects dual-mode antenna through high-frequency feed line, and inner direct current regulation circuit output connects the each several part power input; Direct supply has built-in and external connects structure for two kinds, and the external direct supply is independent outside casing, and all the other each several parts are installed in the casing; RS232 data communication interface or USB interface connect general-purpose computer.
6. pass alarm meter reading monitor terminal and system according to claim 1 or 2 or 3 or 4 described null-balance method monitoring metering fault wireless long-distance digitals, described monitoring metering fault electric energy meter and wireless long-distance digital pass the alarm meter reading monitor terminal and are assembled in the housing, " null-balance method monitoring metering fault wireless long-distance digital passes alarm meter reading electric energy meter terminal " that constitutes, it is characterized in that: enlarge housing by the described null-balance method monitoring metering fault of claim 2 electric energy meter, the described wireless long-distance digital of claim 2 is passed the alarm meter reading monitor terminal partly to be assembled in the housing, connecting relation is that the joint Terminal between two parts is removed, use directly connection on connector connection or the circuit board instead, the inner composition of two parts and other structure are constant.
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