CN101907646B - 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 monitoring system for a zero balancing method metering fault monitor which is composed of a zero balancing method metering fault monitoring electric energy meter formed by a zero balancing method triphase current fault monitoring circuit U3 and a common electricity meter U1 and developed according to a zero balancing method metering fault monitoring principle of the invention, a wireless long-distance digital alarm meter reading monitoring terminal and a center receive/dispatch main machine. Using the principle of the invention, the faults such as secondary circuit spontaneous combustion and distributary stealing electricity can be monitored and distinguished. U1, U3 and U2 together form the metering fault monitoring electric energy meter terminal and the principle is shown as a figure. The system combines the metering fault monitoring alarm control and data sending and reading and is suitable for a power supply station area.
Description
Technical field
The invention belongs to electric energy metrical malfunction monitoring radio alarming application, the monitoring metering fault electric energy meter that " null-balance method monitoring metering fault principle " of the present invention for using and implementing circuit are developed into and radio alarming circuit add digital temperature monitoring warning, anti-theft monitoring warning, other warning (reporting to the police as unpacking) observation circuit, the Multifunctional measuring malfunction monitoring wireless data sending warning ammeter terminal that fuses into one consists of null-balance method measurement malfunction monitoring wireless remote data-transmission alarming kilowatt meter reading-out system with center transmitting-receiving main frame.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 the waste of manpower of metering fault hidden danger and poor effect, without 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 " Integral operation tester for electric energy metering device " 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 the detection and the check new tool, solved metering fault hidden danger and manually searched difficult problem, applying rear has been now to search the indispensable instrument of metering fault hidden danger.The platform district patrol and examine and measure fault and exist one by one but also need manually carry instrument, can not in time automatically find metering fault hidden danger.
There was in recent years electric energy meter to increase anti-stealing electricity function, but mainly was single-phase electronic energy meter.Its principle is: single-phase meter increases the neutral line current input signal, live wire electric current line and neutral line current line are accessed electric energy meter simultaneously, (the electric current line is in the off-balancesheet short circuit when the current distributing stealing is arranged on live wire, the part electric current is not flowed through in table), live wire current input signal amplitude will be different from neutral line current signal input range, what in table, electric energy computation chip was used is the anti-stealing electricity function chip, the two paths of signals input end is arranged on chip, in chip, the accumulative total electric flux automatically by the large calculating of secondary degree, prevents from shunting few quantity calculation.And the three-phase and four-line electric energy meter can not detect shunting stealing fault with the method, because neutral line current and three-phase firewire current amplitude are unequal under normal circumstances, usually three-phase firewire (380V) electric current of three-phase four-wire system not necessarily equates, neutral line current is uncertain, sometimes difference is very large, and neutral line current may be zero when the three-phase firewire electric current equates, neutral line current is larger when three-phase current unbalance, sometimes also larger than certain live wire electric current, and also may be zero under certain phase current non-failure conditions.So the fault detects such as three-phase kilowatt-hour meter secondary circuit and external shunt stealing are more difficult, there is no at present effective monitoring method and product, only have the three-phase voltage of differentiation amplitude, detect decompression.As for the current return fault, some measuring three-phase current amplitudes are differentiated the three-phase current unbalance degree, but all can not effectively be determined with without secondary circuit failure and current distributing 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 metering detector core circuit is attached to batch meter, the cost height is infeasible, therefore the monitoring principle method and the implementing circuit that need research to make new advances add in batch meter or electric energy meter, can in time find metering fault hidden danger by Real-Time Monitoring metering fault radio alarming.
At present under electric power system electric substation, each 10KV circuit power distribution station power distribution automation not yet develops, and reason is that situation is complicated, there is no the development model of getting well.
The present present situation of the transformer anti-theft that the present invention adds, overtemperature alarm aspect is: the power transmission during irrigation and drainage of agriculture Pai Tai district, have a power failure during slack season, the stolen event of transformer often appears in outage, there is no sound monitoring and alarm protection system, though the transformer anti-theft warning system has the part line applications, fail to apply, reason is 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 generation, and someone manufactures experimently the temperature monitoring warning system, but also fails Implementation and application, and reason is as burglar alarm; Manual metering waste of manpower, wireless long-distance meter-reading have application example in recent years, but fail also that fine reason is still function singleness at 10KV circuit Implementation and application, and expense is high, and cost performance is low, fail Implementation and application.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, and after awaiting the 10KV distribution line automated wireless monitoring net development model application success of perfect in shape and function, 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 worked out " null-balance method monitoring metering fault principle ", and grind and try out implementing circuit null-balance method monitoring metering fault circuit, be installed in batch meter or electric energy meter, increase the neutral line current mutual inductor, effectively monitoring current mutual inductor ratio mistake, secondary loop 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.Implementing circuit with " null-balance method monitoring metering fault principle " development adds electric energy meter, consist of " null-balance method monitoring metering fault electric energy meter " of the present invention (being called for short the monitoring metering fault electric energy meter), add again " wireless digital transmits and reports to the police and data collector ", consist of " null-balance method measurement malfunction monitoring wireless remote data-transmission alarming electric energy meter terminal ", (being called for short the ammeter terminal) forms " null-balance method measurement malfunction monitoring wireless remote data-transmission alarming check meter supervisory system " with center wireless receiving and dispatching main frame and antenna; Wireless data sending warning transceiver also can not add electric energy meter, the housing of packing into separately is called: wireless long-distance digital passes the alarm meter reading monitor terminal, is loaded in batch meter with the monitoring metering fault electric energy meter, be called the split-type structural form, benefit is be convenient to calibration and safeguard.
Hereinafter set forth respectively each several part principle, structure and implementation method.
" null-balance method monitoring metering fault principle " that the present invention proposes its essence is: the vector that has proposed three-phase current equals negative sense neutral line current vector, both the three-phase current vector added the null rule of neutral line current vector, 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 with the phasing degree, formed by current amplitude and phasing degree, method of discrimination: zero balancing vector principle is seen accompanying drawing 4 explanations, primary current total vector after current transformer is transformed into secondary current is still zero under normal circumstances, if current transformer is without faults such as inside electric leakage or short circuits, and the threephase current transformer no-load voltage ratio is consistent, 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 the secondary current of access electric energy meter has shunting, short circuit, open circuit, loose contact, the faults such as phase place wrong, will break three-phase current and add the zero Balances such as Zero-phase current, amplitude and phase judgment shunting or leakage current and place phase line according to total vector.Use this Principle Method, the null-balance method monitoring metering fault circuit of developing, the effectively three-phase current shunting of monitoring and metering loop, short circuit, open circuit, tie metering faults such as touching bad, phase place wrong, Figure of description 4 is seen in the diagram of vector principle, and structural principle is seen Figure of description 2.
The rig-site utilization connection principle sees shown in accompanying drawing 3, and it is to have increased the neutral line current mutual inductor with common secondary circuit device difference in the past.
" null-balance method monitoring metering fault principle " according to the present invention grinds the monitoring metering fault circuit that tries, be installed in the ordinary electronic electric energy meter, be developed into null-balance method monitoring metering fault electric energy meter, replace existing common electric energy meter, but Real-Time Monitoring measuring apparatus fault type, pass the alarm meter reading monitor terminal by split type wireless long-distance digital, 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 shows record, and note and Advise By Wire person liable, in time carry " electric power meter on-line detector or the check meter " scene of having carried out and check the confirmation processing.
The null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention monitoring system of checking meter.it is characterized in that: the null-balance method monitoring metering fault circuit of using null-balance method monitoring metering fault principle development of the present invention adds ordinary electronic electric energy meter monitoring shunting stealing fault or natural metering fault to consist of null-balance method monitoring metering fault electric energy meter (DB1...DBn), transmit with the collection wireless data, antitheft, overtemperature monitoring, alarming control circuit passes alarm meter reading monitor terminal (ZD1...ZDn) in the wireless long-distance digital of one, center transmitting-receiving main frame (ZJ) and terminal antenna (ATC1...ATCn), center antenna (ATZ) forms this system, its connecting relation is: the null-balance method monitoring metering fault electric energy meter (DB1...DBn) that a plurality of structures are identical connects wireless long-distance digital through joint Terminal and passes alarm meter reading monitor terminal (ZD1...ZDn), wireless long-distance digital passes alarm meter reading monitor terminal (ZD1...ZDn) and connects terminal antenna (ATC1...ATCn), connect center antenna (ATZ) through wireless channel, center antenna (ATZ) connection center transmitting-receiving main frame.System principle such as Fig. 5,
Its System Working Principle is: after null-balance method monitoring metering fault electric energy meter DB1...DBn works on power, the balance of Real-Time Monitoring three-phase current and neutral line current vector, whether differentiate has metering fault, if analysis of failure type is arranged, be sent to wireless data sending alarm meter reading monitor terminal DB1...ZDn through interface, through in-line coding and wireless transceiver circuit antennas ATC1...ATCn transmitted radio signal; Center antenna ATZ receives signal and send center transmitting-receiving main frame ZJ, and demodulating and decoding goes out terminal number and malfunction coding type, send simultaneously the computer in ZJ to show, store; Non-failure conditions is regularly sent out test signal one time lower every day, and the expression terminal monitoring transmits normal, utilizes a test signal to pass the current table code data of electric energy meter or other data back, as table code, temperature, power etc., realizes the line loss statistics.Its connecting relation is: null-balance method monitoring metering fault electric energy meter DB1...DBn connects with wireless long-distance digital biography alarm meter reading monitor terminal ZD1...ZDn through connecting port and terminal, the high frequency output that wireless long-distance digital passes alarm meter reading monitor terminal ZD1...ZDn connects antenna ATC1...ATCn, master machine antenna ATZ connection center transmitting-receiving main frame.
Center transmitting-receiving main frame ZJ inner structure forms as accompanying drawing 7.
Wireless long-distance digital passes alarm meter reading monitor terminal ZD1...ZDn all transformer anti-theft and overtemperature monitoring and other warning input port, and the feelings of the robber alert signal of also can in time transmitting messages is arranged, this system architecture refining, and cost performance is high, is fit to each transformer platform area and uses.
Null-balance method measurement malfunction monitoring wireless remote data-transmission alarming kilowatt meter reading-out system of the present invention, in rig-site utilization, agricultural drainage and irrigation platform district has a power failure slack season for a long time, the normal monitoring, alarming of energy, install solar panel and energy-storage battery additional, power power supply and solar energy storage powered battery automatically switch, but after power failure still long term monitoring report to the police and regularly upload test signal and data, assurance line loss statistical accuracy; Outage has dormancy economize on electricity and wireless awakening to check current table code function.
The null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention supervisory system of checking meter, except the monitoring metering fault data transmit warning, also comprehensively fuse into the interface circuits such as transformer anti-theft monitoring, alarming, transformer temperature monitoring, alarming, the unpacking monitoring, alarming of batch meter, the transmission of transformer platform area electrical quantity, control, automatically report electrical quantity to comprise: voltage, electric current, power, power factor, active energy, reactive energy, freeze active energy, freeze the parameter such as reactive energy, for regular line loss statistics provides data.This perfect function cost performance is high, can form 10KV distribution line automation development pattern for selecting.
The check meter communication channel of supervisory system of null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention: adopt GSM/GPRS/RF combined wireless communication network, middle distance adopts the RF radio frequency to transmit (this is different from the low coverage wireless remote control and wakes up), adopts at a distance SMS (Short Messaging Service) GSM or wireless Internet access GPRS to transmit.
Null-balance method 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 fault monitoring circuit (also claiming null-balance method monitoring metering fault circuit); Form the electric energy meter with monitoring metering fault, can effectively monitor out the metering faults such as secondary circuit shunting.
Its all-in-one-piece null-balance method monitoring metering fault energy meter terminal,
two of principal character of the present invention is: add wireless long-distance digital to pass warning transmission circuit and control circuit in null-balance method monitoring metering fault electric energy meter, current failure and voltage fault signal in time are sent to alarm center by wireless remote numeral transmission transceiver, consist of null-balance method monitoring metering fault energy meter terminal, its one-piece construction is: by existing three phases electronic energy meter, with the Zero-phase current input terminal that increases, null-balance method monitoring metering fault circuit, current failure warning lead-out terminal and pilot lamp, voltage failure warning lead-out terminal and pilot lamp, wireless long-distance digital passes the warning transceiver and forms, its circuit theory such as accompanying drawing 1.Its version is that the electric energy meter that wireless long-distance digital passes warning transceiver and belt current malfunction monitoring is installed on (but also partial installation) in a shell.
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, the current failure monitor signal of null-balance method monitoring metering fault electric energy meter and data communication end A, the B of RS485 telecommunication circuit are connected with wireless long-distance digital biography warning transceiver, structural principle is as shown in accompanying drawing 1 (b).
After split, wireless long-distance digital is passed the warning transceiver and add input and output terminal, data communication end A, B, be installed on separately in a shell, consist of wireless long-distance digital and pass the alarm meter reading monitor terminal, its structure is seen Figure of description 6.
Transmitting-receiving host machine part in center of the present invention, circuit theory such as Fig. 7,
null-balance method monitoring metering fault electric energy meter of the present invention and wireless long-distance digital pass the alarm meter reading monitor terminal and are installed in a housing, " the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming electric energy meter terminal " that consists of, 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 a housing, connecting relation is that the joint Terminal between two parts is removed, use instead on connector connection or circuit board and directly connect, the inner composition of two parts and other structure are constant, circuit theory is still as Fig. 1 (a).
Description of drawings
Fig. 1 (a) is integrated null-balance method measurement malfunction monitoring wireless remote data-transmission alarming electric energy meter terminal integrated circuit structure principle chart, minute U1, U2, U3 three bulks in figure, and U1 is electric energy computation chip and button display circuit part; U2 is that wireless long-distance digital passes warning transceiver part; U3 is three-phase current fault monitoring circuit part.
Accompanying drawing 1 (b) is minute two body schematic diagram, is divided into null-balance method monitoring metering fault electric energy meter and wireless data sending alert detecting terminal, and in accompanying drawing 1 (b), J1, J2 are two dotted line frames of minute two bodies, are null-balance method monitoring metering fault electric energy meter part in J1; , pass alarm meter reading monitor terminal part for wireless long-distance digital in J2.In figure, all identifier declarations such as U1, U2, U3, UO, UA, UB, UC, IA, IB, IC, IO1, IO2, UG, IG, A, B, GND are identical with Fig. 1 (a).
Accompanying drawing 2 is null-balance method monitoring metering fault circuit principle structure block diagram.
Accompanying drawing 3 is threephase current transformer and neutral line current mutual inductor interstar connection schematic diagram.
Accompanying drawing 4 is null-balance method monitoring metering fault principle vector analysis figure.
Accompanying drawing 5 is supervisory system theory of constitution block diagram.
Accompanying drawing 6 is circuit structure diagrams that in Fig. 1, the wireless long-distance digital in U2 passes alarm meter reading monitor terminal part.
Wireless receiving and dispatching main machine structure schematic diagram centered by accompanying drawing 7.
Embodiment
Null-balance method measurement malfunction monitoring wireless remote data-transmission alarming electric energy meter terminal of the present invention, circuit structure principle such as Figure of description 1 (a), in Fig. 1 (a), UA, UB, UC are the three-phase voltage input terminal, and UO is zero line (phase) voltage input end; IA, IB, IC are the three-phase current input terminal; IO1, IO2 are zero line (phase) current input terminal; BU1, BU2, BU3, BIa, BIb, BIc, BIo, Rua, Rub, RUc, RIa, RIb, RIc, RIo are respectively three-phase voltage, electric current isolated converter device; U1 is electric energy computation chip and button display circuit part; U2 is that wireless long-distance digital passes warning transceiver part; U3 is three-phase current fault monitoring circuit part; UG is three-phase voltage no-voltage fault lead-out terminal; IG is three-phase current malfunction monitoring lead-out terminal; LU, LI are respectively the voltage and current malfunction indicator lamp; B1...Bn is the external alert detecting input terminals 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 control output end, and is the amount doesn't matter according to the application requirements lead-out terminal; AT is dual-mode antenna; A, B are RS485 data communication end; GI, GU are photoelectric isolating device, and GND is the common ground end.
In null-balance method monitoring metering fault electric energy meter of the present invention, its theory structure such as accompanying drawing 1 (a), U1, U3 and auxiliary genus circuit part, is characterized in that: by null-balance method monitoring metering fault circuit U 3; Three-phase voltage input terminal UA, UB, UC; The sub-UO of zero line (phase) voltage input end; Three-phase current input terminal IA, IB, IC; RS485 data communication end A, B; The sub-IO1 of zero line (phase) current input terminal, IO2; Three-phase current voltage isolated variable device (BU1, BU2, BU3, BIA, BIB, BIC, BIO, Rua, Rub, RUc, RIa, RIb, RIc, RIo); Electric energy computation chip and button display circuit part U1; Current failure warning lead-out terminal IG and pilot lamp LI; Voltage failure warning lead-out terminal UG and pilot lamp LU; Photoelectric isolating device GI, GU; Common GND; Casing consists of.Its connecting relation is that three-phase voltage input end (UA, UB, UC) and three-phase current input terminal (IA, IB, IC) connect respectively the electric energy computation chip input end by voltage, the current signal of electric current and voltage isolated converter (BU1, BU2, BU3, BIA, BIB, BIC) output respectively, connect respectively simultaneously input end corresponding to current failure observation circuit, two neutral line current input terminals (IO1, IO2) connect barrier observation circuit zero line input end through the electric current isolated converter; The fault-signal of current failure observation circuit output connects current failure pilot lamp (LI), simultaneously through photoelectric isolating device (GI) lead-out terminal taking alarm (IG); The no-voltage fault signal that electric energy computation chip is differentiated output connects voltage failure pilot lamp (LU), connects simultaneously voltage failure warning lead-out terminal (UG).Its version is to add null-balance method monitoring metering fault circuit and two zero (mutually) line current input terminals and fault alarm lead-out terminal IG, UG and fault alarm pilot lamp LU, LI to consist of on common three phases electronic energy meter, if in application, the three-phase input current Current Transformer need to increase the neutral line current mutual inductor.
Accompanying drawing 2 is null-balance method monitoring metering fault circuit principle structure block diagram, and in 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 mould with the phasing degree/number vector converter; YS is the current phasor treatment circuit; PB is the Fault Identification part; IG is the current failure output terminal, and UG is the voltage failure output terminal.
Null-balance method monitoring metering fault circuit of the present invention, that it is characterized in that adding the neutral line current vector according to the three-phase current vector and be whether zero to differentiate the null-balance method monitoring metering fault principle whether the metering circuit fault exists, the implementing circuit of development, it is by three-phase current signal amplifier and mould/number conversion circuit ZA, ZB, ZC; The conversion of neutral line current signal, amplification, mould/number conversion circuit ZO; Current phasor treatment circuit YS; Metering fault judging circuit PB; Current failure lead-out terminal IG, voltage failure lead-out terminal UG; Three-phase current signal input end IA, IB, IC; Neutral line current signal input terminal IO; Neutral line current mutual inductor HO; Communication port I2C forms, obtain three-phase voltage fault distinguishing signal by the I2C interface from electric energy meter metering single-chip microcomputer, communication port (I2C) connects current phasor treatment circuit (YS), metering fault judging circuit PB differentiates the three-phase current fault according to null-balance method monitoring metering fault principle, through terminal IG end output current fault-signal, terminal UG end output voltage fault-signal, its connection relation is: the three-phase current 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 end IA, IB, the IC electric energy meter three phase metering signal end that is connected in parallel respectively, output meets current phasor treatment circuit YS; The conversion of neutral line current signal, amplification, mould/number conversion circuit (ZO) input signal connect the current output terminal of neutral line current mutual inductor through terminal IO, the conversion of neutral line current signal, amplification, mould/number conversion circuit (ZO) output signal meet current phasor treatment circuit YS, current phasor treatment circuit YS output connects metering fault judging circuit (PB) input, and increasing the neutral line current mutual inductor in rig-site utilization provides the neutral line current signal.
Accompanying drawing 3 is three-phase current and neutral line current mutual inductor interstar connection schematic diagram, in Fig. 3, HA, HB, HC are original A, B, C threephase current transformer, HO is the neutral line current mutual inductor that the null-balance method monitoring metering fault increases, and DIA, DIB, DIC are A, B, C three-phase power primary current line; DIO is zero line primary current line; IO is the zero line secondary current; IA, IB, Ic are A, B, C three-phase secondary current.
Accompanying drawing 4 is null-balance method monitoring metering fault principle vector analysis figure, and in Fig. 4, IA, IB, IC are respectively through showing the three-phase current vector of interior micro mutual inductor conversion; IO is the neutral line current vector; IE is error vector, equals the vector of IA+IB+IC+IO.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 IE=0 sentences non-fault; Fig. 4 b is three-phase balance, and IA has Fen Liu ﹠amp; Current phasor figure under the IA failure condition, IO=0, IE=-$ IA, sentencing A has current failure mutually; Fig. 4 c is three-phase current unbalance, and without the current phasor figure under the shunting failure condition, IO does not wait zero, and vector IE=0 sentences non-fault; Fig. 4 b is that three-phase current unbalance B phase secondary current has electric leakage or shunting ﹠amp; Current phasor figure in the IB situation, IO do not wait 0, IE=-﹠amp; IB, sentencing has fault in the B phase.Schematic diagram explanation thus: no matter three-phase current balance whether, if without mutual inductor ratio problem or secondary current short circuit, open circuit, minute 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 metering current fault and fault order of severity mutually can differentiate according to phase place and the amplitude of vector IE is.
Accompanying drawing 5 is the theory of constitution figure of system, and in Fig. 5, DB1...DBn is several null-balance method monitoring metering fault electric energy meters; ZD1...ZDn is several wireless data sending alarm meter reading terminals; ATC1...ATCn is each corresponding terminal antenna, and ATZ is master machine antenna; Transceiver centered by ZJ.
Its connecting relation is: lead-out terminal IG, the UG on null-balance method monitoring metering fault electric energy meter DB1...DBn and RS485 data communication end A, and B connects respectively by tie the corresponding terminal that wireless long-distance digital passes alarm meter reading monitor terminal ZD1...ZDn; The input terminal B1...Bn that wireless long-distance digital passes alarm meter reading monitor terminal ZD1...ZDn connects on-the-spot each alert detecting senser element; Its lead-out terminal K1...Kn connects field control relay or switching point; The radio frequency output that wireless long-distance digital passes alarm meter reading monitor terminal ZD1...ZDn meets antenna ATC1...ATCn; Master machine antenna ATZ connects the high-frequency signal input/output terminal of center transmitting-receiving main frame ZJ; ZJ 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, the data input/output terminal of center transmitting-receiving main frame ZJ shows the storage computer in order wire connection center transmitting-receiving main frame ZJ, this computer that shows storage is installed supporting monitoring display and records storing software with general purpose PC computer or the high industrial computer of reliability in machine.Center transmitting-receiving main frame ZJ inner structure such as accompanying drawing 7.
Fig. 6 is the cut-away view of U2 in Fig. 1 (a), is also that split type wireless long-distance digital passes alarm meter reading monitor terminal circuit structure as figure.
In Fig. 6, B1...Bn is the alert detecting input terminal; K1...Kn is control output end; A, B are RS485 data communication end; IG, UG are electric current, voltage failure input terminal; SFDL is serial data control circuit (also claiming the RS485 chip circuit); KZQ is the Single Chip Microcomputer (SCM) program controller, mainly realizes alert detecting, coding, data transmit-receive identification and controls; CSFB is the wireless remote transceiver boards; XJSB low coverage wireless remote control wakes dash receiver up; XYKQ is the low coverage wireless remote control handle; DCWYQ is inner mu balanced circuit; DP is energy-storage battery; D1, D2 are diode; CDKZQ is charge controller, sufficient automatic stop function; GVDY is solar panel; WDC is direct supply, and the elementary alternating current 220V that connects becomes low-voltage direct for the terminal electricity consumption through isolated variable; 220V is the electric main plug; CZ1 is that supply hub, CZ2 are outer power plug.
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; Low coverage remote control reception plate XJSB; Digiplex XYKQ; Single Chip Microcomputer (SCM) program controller KZQ; Electric current, voltage failure warning input terminal IG, UG; RS485 data communication end A, B; Serial data control circuit SFDL; Alert detecting input terminal B1...Bn; The sub-K1...Kn in control output end; Direct supply WDC; Dual-mode antenna AT; Power input plug CZ2; Power input socket CZ1; Energy-storage battery DP; Diode D1, D2; Solar panel GVDY; Inner mu balanced circuit DCWYQ; Direct supply WDC; Casing consists of.Its annexation is: alert detecting input terminal B1...Bn connects respectively each corresponding input end of single-chip microcomputer programming controller KZQ; The sub-K1...Kn in control output end connects respectively switch control output end corresponding to Single Chip Microcomputer (SCM) program device KZQ processed; RS485 data communication end A, B meet single-chip microcomputer programming controller KZQ through serial data control circuit SFDL; Electric current, voltage failure warning input terminal IG, UG connect input end corresponding to Single Chip Microcomputer (SCM) program device KZQ processed; Low coverage remote control reception plate output terminal connects single-chip microcomputer programming controller KZQ input port; Wireless remote transceiver boards CSFB data input/output terminal connects respectively single-chip microcomputer programming controller I/O, inner mu balanced circuit DCWYQ output connects this monitor terminal each several part power input, and the high frequency input/output terminal of wireless remote transceiver boards ZSFB connects dual-mode antenna AT; Solar panel GVDY meets charge controller CDKZQ; Charge controller CDKZQ meets energy-storage battery DP, and energy-storage battery connects inner mu balanced circuit DCWYQ input through diode D1; The output of direct supply WDC connects attaching plug CZ2, and power input plug CZ1 connects the DCWYQ input through diode D2; Direct supply WDC input meets electric main 220V; Digiplex XYKQ and direct supply WDC, solar panel GVDY are placed in outside casing, and all the other each several parts are installed in casing, consist of wireless long-distance digital and pass the alarm meter reading monitor terminal.
Transmitting-receiving main machine structure schematic diagram centered by accompanying drawing 7.In Fig. 7, AT is antenna; ZSPB is the wireless remote transmission circuit; PDKZ channel automatic switching control circuit; JMKZQ center machine decoding and coding master controller; RS232 is interface circuit; The aobvious storage computer of looking centered by XSJL; DCWYQ is inner mu balanced circuit; The WDC direct supply; CZ1 is supply socket; CZ2 is attaching plug; 220V is the electric main plug.
Center of the present invention transmitting-receiving main frame such as accompanying drawing 7 is characterized in that: by wireless remote transceiver boards ZSFB; Channel automatic switching control circuit PDKZ; Center machine decoding and coding master controller JMKZQ; Interface circuit RS232 (or USB interface); The center shows storage computer XSJL; Direct supply WDC; Inner mu balanced circuit DCWYQ; Supply socket CZ1, attaching plug CZ2; Antenna AT; Casing consists of, and its annexation is: direct supply WDC connects the input of inner mu balanced circuit DCWYQ through attaching plug CZ2, supply socket CZ1; Interface circuit RS232 (or USB interface) is to external connecting center demonstration storage computer XSJL; Interface circuit RS232 (or USB interface) internally meets center machine decoding and coding master controller JMKZQ through inner Transistor-Transistor Logic level conversion block; Wireless remote transceiver boards input/output signal termination center machine decoding and coding master controller JMKZQ, the high-frequency signal input/output terminal of wireless remote transceiver boards ZSFB connects antenna AT through high-frequency feed line; The output of inner mu balanced circuit DCWYQ connects the power input of each several part circuit in center transmitting-receiving main frame; Direct supply WDC has built-in and two kinds of structures of external, and the external direct supply is outside casing, and all the other each several parts are installed in casing, consists of the center transmitting-receiving main frame that wireless long-distance digital passes the alarm meter reading monitoring terminal system.
Null-balance method monitoring metering fault electric energy meter of the present invention and wireless long-distance digital pass alarm meter reading monitor terminal integrative installation technology in a housing, consist of " null-balance method measurement malfunction monitoring wireless remote data-transmission alarming electric energy meter terminal ".
It is characterized in that described null-balance method monitoring metering fault electric energy meter casing is enlarged, the internal circuit and the terminal group that pass the alarm meter reading monitor terminal with wireless long-distance digital of the present invention are loaded in a housing, connecting relation is that the joint Terminal between two parts is removed, use directly connection on connector connection or circuit board instead, the inner composition of two parts and other structure are constant.Concrete connection between the two is: RS485 data communication end A, the B of null-balance method monitoring metering fault electric energy meter directly connects RS485 data communication end A, the B that wireless long-distance digital passes the alarm meter reading monitor terminal, and the monitoring metering fault output terminal in null-balance method monitoring metering fault electric energy meter directly connects the fault input end that wireless long-distance digital passes the alarm meter reading monitor terminal.
The null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention supervisory system of checking meter, install this null-balance method monitoring metering fault 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 is placed in outside the table case, center configuration wireless receiving and dispatching main frame connects antenna and shows storage computer construction system.If the center free channel communication of RF, but the high antenna economization of frame communication cost connect antenna and main frame with high-frequency feed line.Each terminal can increase and joins antitheft sensing device and oil temperature sensing head as required, and the overtemperature alarm vane is realized additional function.On probation through pilot more than a year, working stability, performance is surely leaned on.
The null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention supervisory system of checking meter, main innovate point is looked 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: the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention supervisory system of checking meter, timely monitor station district metering fault, numeral transmits fault type, that current distributing fault or certain phase voltage no-voltage fault can effectively be monitored explanation, terminal has the multiple alarm input port, but progress of disease depressor overtemperature alarm signal and the stolen alerting signal of transformer, infrared alarm identification signal during as the human body approach transformer, during split-type structural, with electric energy meter RS485 data communication end A, B connects wireless long-distance digital of the present invention and passes the alarm meter reading monitor terminal, the wireless transmission ammeter data of energy, 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 Transmission 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 and Practical significance: the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming of the present invention supervisory system of checking meter, can in time monitor electric energy metrical fault and other fault, the patrol waste of metering fault of manpower-free, stolen to anti-electricity-theft, anti-transformer, line loss reducing, larger Practical significance is arranged, and applying to have very large economic results in society and Practical significance.
Claims (6)
1. the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming monitoring system of checking meter, it is characterized in that: the null-balance method three-phase current fault monitoring circuit of using null-balance method monitoring metering fault principle development of the present invention adds ordinary electronic electric energy meter monitoring shunting stealing fault or natural metering fault to consist of null-balance method monitoring metering fault electric energy meter (DB1...DBn), transmit with the collection wireless data, antitheft, overtemperature monitoring, alarming control circuit passes in the wireless long-distance digital of one the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming reading out electricity meter terminal that alarm meter reading monitor terminal (ZD1...ZDn) one connects formation, center transmitting-receiving main frame (ZJ) and terminal antenna (ATC1...ATCn), center antenna (ATZ) forms this system, its connecting relation is: the null-balance method monitoring metering fault electric energy meter (DB1...DBn) that a plurality of structures are identical connects wireless long-distance digital through joint Terminal and passes alarm meter reading monitor terminal (ZD1...ZDn) formation null-balance method measurement malfunction monitoring wireless remote data-transmission alarming reading out electricity meter terminal, wireless long-distance digital passes alarm meter reading monitor terminal (ZD1...ZDn) and connects terminal antenna (ATC1...ATCn), connect center antenna (ATZ) through wireless channel, center antenna (ATZ) connection center transmitting-receiving main frame.
2. the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming according to claim 1 monitoring system of checking meter, described null-balance method monitoring metering fault electric energy meter, it is characterized in that the null-balance method three-phase current fault monitoring circuit of using null-balance method monitoring metering fault principle development of the present invention adds the ordinary electronic electric energy meter, change the circuit structure of former three phases electronic energy meter, increase the Zero-phase current input terminal, current failure alarm lamp and lead-out terminal, three-phase current shunting fault monitoring circuit; It is by null-balance method three-phase current fault monitoring circuit (U3); Three-phase voltage input terminal (UA, UB, UC), zero line voltage input end (UO); Three-phase current input terminal (IA, IB, IC); Zero line (phase) current input terminal (IO1, IO2); RS485 data communication end (A, B); Electric current and voltage isolated variable device (BU1, BU2, BU3, BIA, BIB, BIC, BIO, RUa, RUb, RUc, RIa, RIb, RIc, RIO); Electric energy computation chip and button display circuit part (U1); 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); Photoelectric isolating device (GI, GU); Casing consists of, its connecting relation is that three-phase voltage input end (UA, UB, UC) and three-phase current input terminal (IA, IB, IC) connect respectively the electric energy computation chip input end by the current and voltage signals of electric current and voltage isolated converter (BU1, BU2, BU3, BIA, BIB, BIC) output respectively, connect respectively simultaneously input end corresponding to three-phase current fault monitoring circuit, two neutral line current input terminals (IO1, IO2) connect three-phase current fault monitoring circuit zero line input end through the electric current isolated converter; The fault-signal of three-phase current fault monitoring circuit output connects current failure pilot lamp (LI), simultaneously through photoelectric isolating device (GI) lead-out terminal taking alarm (IG); The no-voltage fault signal that electric energy computation chip is differentiated output connects voltage failure pilot lamp (LU), connects simultaneously voltage failure warning lead-out terminal (UG); Its version is to add null-balance method monitoring metering fault circuit and two zero (mutually) line current input terminals and fault alarm lead-out terminal IG, UG and fault alarm pilot lamp LU, LI to consist of on common three phases electronic energy meter, if in application, the three-phase input current Current Transformer need to increase the neutral line current mutual inductor.
3. the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming according to claim 1 and 2 monitoring system of checking meter, described null-balance method three-phase current fault monitoring circuit, it is characterized in that using that three-phase current vector of the present invention adds the neutral line current vector and be whether zero to differentiate the null-balance method monitoring metering fault principle whether the metering circuit fault exists, the implementing circuit of development, it is by three-phase current signal amplifier and mould/number conversion circuit (ZA, ZB, ZC); The conversion of neutral line current signal, amplification, mould/number conversion circuit (ZO); Current phasor treatment circuit (YS); Metering fault judging circuit (PB); Current failure lead-out terminal (IG); Voltage failure lead-out terminal (UG); Three-phase current signal input end (IA, IB, IC); Neutral line current signal input terminal (IO); The neutral line current mutual inductor; Communication port (I2C) consists of, and connection relation is: the three-phase current 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, IC) electric energy meter three phase metering signal end that is connected in parallel respectively, output connects current phasor treatment circuit (YS); The conversion of neutral line current signal, amplification, mould/number conversion circuit (ZO) input signal connect neutral line current mutual inductor output current end through terminal (IO), the conversion of neutral line current signal, amplification, mould/number conversion circuit (ZO) output signal connect current phasor treatment circuit (YS), current phasor treatment circuit (YS) output connects metering fault judging circuit (PB) input, communication port (I2C) connects current phasor treatment circuit (YS), and increasing the neutral line current mutual inductor in rig-site utilization provides the neutral line current signal.
4. the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming according to claim 1 monitoring system of checking meter, described wireless long-distance digital passes the alarm meter reading monitor terminal, it is characterized in that collecting multiple alarm monitoring, the transmitting-receiving of numerical coding wireless remote data is transmitted in one, it is by wireless remote transceiver boards (CSFB); Low coverage remote control reception plate (XJSB); Digiplex (XYKQ); Single Chip Microcomputer (SCM) program controller (KZQ); Electric current, voltage failure warning input terminal (IG, UG); Data communication end (A, B); Serial communication control circuit (SFDL); Alert detecting input terminal (B1...Bn); Control output end (K1...Kn); Direct supply (WDC); Dual-mode antenna (AT); Power input plug (CZ2); Power input socket (CZ1); Energy-storage battery (DP); Charge controller (CDKZQ); Diode (D1, D2); Solar panel (GVDY); Inner mu balanced circuit (DCWYQ); Casing consists of; Its annexation is: direct supply (WDC) input connects electric main (220V); The output of direct supply (WDC) connects attaching plug (CZ2); Alert detecting input terminal (B1...Bn) connects respectively each corresponding input end of single-chip microcomputer programming controller (KZQ); Control output end (K1...Kn) connects respectively the switch control output end of Single Chip Microcomputer (SCM) program device processed (KZQ) correspondence; Electric current, voltage failure warning input terminal (IG, UG) connect input end corresponding to Single Chip Microcomputer (SCM) program device processed (KZQ); Data communication end (A, B) connects input end corresponding to single-chip microcomputer programming controller (KZQ) through serial data control circuit (SFDL); Low coverage remote control reception plate output terminal connects single-chip microcomputer programming controller (KZQ) input port; The data input/output terminal of wireless remote transceiver boards (CSFB) connects single-chip microcomputer programming controller I/O; Inner mu balanced circuit (DCWYQ) output connects this monitor terminal each several part power input; The high-frequency signal input/output terminal of wireless remote transceiver boards (CSFB) receives sends out antenna (AT); Solar panel GVDY connects charge controller (CDKZQ); Charge controller (CDKZQ) connects energy-storage battery (DP), and energy-storage battery connects inner mu balanced circuit (DCWYQ) input through diode (D1); Power input plug (CZ1) connects inner mu balanced circuit (DCWYQ) input end through diode (D2); Digiplex (XYKQ) and direct supply (WDC), solar panel GVDY are placed in outside casing, and all the other each several parts are installed in casing.
5. the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming according to claim 1 monitoring system of checking meter, described center transmitting-receiving main frame is characterized in that: by wireless remote transceiver boards (ZSFB); Channel automatic switching control circuit (PDKZ); Center machine decoding and coding master controller (JMKZQ); Interface circuit (RS232); The center shows storage computer (XSJL); Antenna (AT); Direct supply (WDC); Inner mu balanced circuit (DCWYQ); Supply socket (CZ1), attaching plug (CZ2); Antenna (AT) casing consists of, and its annexation is: direct supply (WDC) connects the input end of inner mu balanced circuit (DCWYQ) through attaching plug (CZ2), supply socket (CZ1); Interface circuit (RS232) is to external connecting center demonstration storage computer (XSJL); Interface circuit (RS232) internally connects center machine decoding and coding master controller (JMKZQ) through inner Transistor-Transistor Logic level conversion block; Wireless remote transceiver boards (ZSFB) input/output signal termination center machine decoding and coding master controller (JMKZQ) I/O, the high-frequency signal input/output terminal of wireless remote transceiver boards (ZSFB) connects antenna (AT) through high-frequency feed line, and the output of inner mu balanced circuit (DCWYQ) connects the power input of each several part circuit in center transmitting-receiving main frame; Direct supply is placed on outside casing, and all the other each several parts are installed in casing.
6. the null-balance method measurement malfunction monitoring wireless remote data-transmission alarming according to claim 1 monitoring system of checking meter, described null-balance method measurement malfunction monitoring wireless remote data-transmission alarming reading out electricity meter terminal is characterized in that passing the alarm meter reading monitor terminal by null-balance method monitoring metering fault electric energy meter and wireless long-distance digital is assembled in a housing and consists of.
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| WO2015184617A1 (en) * | 2014-06-05 | 2015-12-10 | Honeywell International Inc. | Power metering devices |
| CN104122824A (en) * | 2014-07-28 | 2014-10-29 | 四川中智恒源电气有限公司 | Intelligent industrial tablet management machine |
| CN104931781B (en) * | 2015-05-29 | 2017-11-21 | 国家电网公司 | The measuring method and device at electricity phase angle in three-phase and four-line circuit |
| CN105391170B (en) * | 2015-11-24 | 2018-11-09 | 国网北京市电力公司 | Detecting system for low voltage transmission line |
| CN109030935A (en) * | 2018-08-10 | 2018-12-18 | 国网湖南省电力有限公司 | A kind of three-phase and four-line intelligent meter of independent measurement neutral line current |
| CN110566582B (en) * | 2019-09-24 | 2023-11-14 | 珠海格力电器股份有限公司 | Magnetic bearing control method, magnetic bearing and magnetic bearing system |
| CN111028499A (en) * | 2019-11-14 | 2020-04-17 | 珠海许继电气有限公司 | Intelligent integration terminal for Internet of things platform area and data acquisition and processing method thereof |
| CN112255585A (en) * | 2020-10-13 | 2021-01-22 | 安徽三联学院 | Remote meter reading monitoring system and method based on RTU |
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