CN101266263B - Electric power metrological supervision system and supervision method - Google Patents
Electric power metrological supervision system and supervision method Download PDFInfo
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- CN101266263B CN101266263B CN2008100280596A CN200810028059A CN101266263B CN 101266263 B CN101266263 B CN 101266263B CN 2008100280596 A CN2008100280596 A CN 2008100280596A CN 200810028059 A CN200810028059 A CN 200810028059A CN 101266263 B CN101266263 B CN 101266263B
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Abstract
The invention provides a power measuring and monitoring system and monitoring method, comprising a power measuring device for measuring the power of the first side and the second side of the transformer and a mainframe for measuring and monitoring used for storing a threshold and calculating the relative difference of the energy data of the two sides of the transformer, when the relative difference is greater than the threshold, the alarm information is generated and the communication module sends the alarm information. The method comprises: mounting the power measuring device and mainframe for measuring and monitoring on the transformer to respectively calculating the power of the two sides of the transformer; storing a threshold on the mainframe and calculating the relative difference of the energy data of the two sides of the transformer, if the relative difference is judged to be greater than the threshold by the mainframe, the monitoring center sends an alarm information. The invention can effectively monitor the behavior of electric larceny and reduce the cost of the monitoring center.
Description
Technical field
The present invention relates to a kind of device of measuring electric energy, specifically a kind of electric-power metering monitor system and use the method that this system exercises supervision to electric-power metering.
Background technology
At present, the behavior of theft electric energy is very rampant, and electricity filching person is taked the whole bag of tricks not calculate or calculated electric weight less, to reach the purpose of not handing over or paying tariff less, causes heavy losses to country.Power department takes place for the electric energy that avoids theft, send the inspector regularly or irregularly supply line to be checked, but the timeliness of checking is poor, inspection is not in place, often can't accurately check out time of origin, the place of stealing and can't obtain related data, bring big difficulty to evidence obtaining.
Therefore, publication number is that the application for a patent for invention of CN1866033A discloses the innovation and creation of a kind of " real-time monitoring system for preventing electricity theft for power network " by name, this monitoring system comprises low-voltage electric energy acquisition terminal, high voltage electric energy acquisition terminal and Surveillance center's three parts, wherein low-voltage electric energy acquisition terminal and high voltage electric energy acquisition terminal are gathered step down side and on high-tension side electrical energy parameter in real time, and the electrical energy parameter that collects is sent to Surveillance center by wireless network, Surveillance center's contrast low-pressure side and on high-tension side electrical energy parameter promptly send warning message if note abnormalities.
Though this monitoring system can effectively be monitored transformer two ends electrical energy parameter and be determined whether to take place electricity filching behavior by Surveillance center, yet, the electrical energy parameter of each low-voltage electric energy acquisition terminal and the collection of high voltage electric energy acquisition terminal all is sent to Surveillance center, undertaken electrical energy parameter is analyzed by Surveillance center, therefore, Surveillance center need carry out real-time analysis to mass data, to Surveillance center's arithmetic capability, arithmetic speed is had relatively high expectations, make Surveillance center very huge, cost is costly, and need a large amount of technician that the ruuning situation of Surveillance center is monitored, make monitor system operating cost very high.
Notification number is that the utility model patent of CN200996970Y has been announced the innovation and creation of a kind of " can measure the anti-electricity-theft device of contrast to high-pressure side, low pressure end electric weight " by name.This anti-electricity-theft device is a handheld apparatus, comprises high pressure measurement device and electric power analyser, and this installs from the electric flux of transformer high-voltage side reflection electricity consumption, and electric power signal is sent to negative control center.Simultaneously, the electric power analyser is connected with the low-voltage electric energy table by lead, detects the low-pressure side power consumption by the low-voltage electric energy table, examines real power consumption by contrast high-pressure side power consumption and low-pressure side power consumption.
But this anti-electricity-theft device is not the device that is fixedly mounted on the transformer, need be connected on the transformer when using this anti-electricity-theft device, makes troubles to use.Simultaneously, because this anti-electricity-theft device can not be monitored transformer electricity consumption situation in real time, still need the on-the-spot detection situation of inspector during use.And the use of this anti-electricity-theft device needs to use bigger Surveillance center that transformer high-voltage side, low-pressure side energy data are monitored simultaneously, makes the cost of Surveillance center costly.
Summary of the invention
Fundamental purpose of the present invention provides a kind of in real time transformer both sides electric energy the monitoring and the electric-power metering monitor system of Surveillance center's low cost;
Another object of the present invention provides a kind of electric-power metering measure of supervision of effective monitoring electricity filching behavior.
For realizing above-mentioned fundamental purpose, electric-power metering monitor system provided by the invention comprises electric energy metering machine and metrological supervision main frame, wherein electric energy metering machine is used for the electric energy of calculating transformer low-pressure side, the metrological supervision main frame is used for the on high-tension side electric energy of calculating transformer, the metrological supervision main frame is provided with the electrical signal collection module, the electric energy computing module, comparison module and communication module, wherein the electrical signal collection module is connected with the transformer both sides, gather the voltage signal and the on high-tension side current signal of step down side respectively, the electric energy computing module is used to obtain the low-pressure side voltage signal and the high voltage side current signal of electrical signal collection module input and calculate on high-tension side electric energy, comparison module stores a threshold value, be used to receive energy data from electric energy metering machine, and calculate the energy data of electric energy metering machine input and the relative difference of the energy data that the electric energy computing module calculates, and generating warning message during greater than threshold value at relative difference, communication module is used to send warning message.
By such scheme as seen, metrological supervision main frame and electric energy metering machine be real-time calculating transformer low-pressure side and on high-tension side electric energy respectively, simultaneously judge by comparison module whether the both sides electric energy occurs unusually, whether the relative difference of promptly judging the both sides energy data greater than threshold value, and is occurring sending warning message to Surveillance center when unusual.Like this, the metrological supervision main frame only just sends warning message when generation is unusual, Surveillance center receives only the warning message from the metrological supervision main frame, does not need to receive electrician and electrical energy parameter, promptly do not need data are carried out a large amount of computings, monitoring, the cost of Surveillance center reduces greatly.And do not need a large amount of technician that its ruuning situation is monitored, save human cost.
A preferred scheme is that during the electric energy of metrological supervision main frame calculating transformer high-pressure side, the electrical signal collection module is connected with the transformer both sides, gathers the voltage signal and the on high-tension side current signal of step down side respectively.Like this, the voltage signal of metrological supervision main frame collection is the voltage signal of step down side, does not need the costly high voltage potential transformer that uses and gather the low-pressure side voltage signal, and electric-power metering monitor system cost is reduced greatly.
For realizing another above-mentioned purpose, electric-power metering measure of supervision provided by the invention is included in first side of transformer electric energy metering machine is installed, and the electric power meter calculates the electric energy of step down side;
The metrological supervision main frame is installed on transformer, is used the electric energy of metrological supervision main frame calculating transformer high pressure, the metrological supervision host stores has a threshold value;
The metrological supervision main frame obtains the energy data of transformer first side of electric energy metering machine calculating, and the relative difference of the energy data of calculating transformer low-pressure side and transformer high-voltage side energy data, and judge that relative difference whether greater than threshold value, in this way, sends warning message to Surveillance center.
This shows, be installed in electric energy metering machine and metrological supervision main frame difference calculating transformer low-pressure side and on high-tension side electric energy on the transformer, and by the relative difference of the energy data of metrological supervision main frame calculating transformer both sides, in case relative difference sends warning message greater than threshold value.Like this, the metrological supervision main frame can effectively be monitored transformer both sides electric energy, and simultaneously, the metrological supervision main frame does not need to send electrician and electrical energy parameter in real time to Surveillance center, the data volume that Surveillance center handles significantly reduces, and the cost of Surveillance center also reduces greatly.
Description of drawings
Fig. 1 is the electrical schematic diagram of electric-power metering monitor system first embodiment of the present invention;
Fig. 2 is the structural representation block diagram of metrological supervision main frame among electric-power metering monitor system first embodiment of the present invention;
Fig. 3 is the electrical schematic diagram of electric-power metering monitor system second embodiment of the present invention.
The invention will be further described below in conjunction with accompanying drawing and each embodiment.
Embodiment
Referring to Fig. 1, be the electrical schematic diagram of electric-power metering monitor system first embodiment of the present invention.In the present embodiment, metrological supervision main frame WH1 and electric energy metering machine WH2 are installed on transformer, wherein electric energy metering machine WH2 is installed in the low-pressure side of transformer, and is connected to a, b, the c three-phase of step down side respectively by low-voltage current mutual inductor TA1, TA2, TA3.Electric energy metering machine WH2 gathers current signal Ia, Ib, the Ic of step down side three-phase by low-voltage current mutual inductor TA1, TA2, TA3.Simultaneously, electric energy metering machine WH2 also is connected with step down side a, b, c three, gathers a, b, c voltage in three phases signal Ua, Ub, Uc.After electric energy metering machine WH2 gathers step down side a, b, c voltage in three phases signal Ua, Ub, Uc and current signal Ia, Ib, Ic, can calculating transformer low-pressure side electric energy.When calculating electric energy, the power P 2 of calculating transformer low-pressure side at first,
P2＝Ua×Ia×COS(φa)+Ub×Ib×COS(φb)+Uc×Ic×COS(φc)
(formula 1)
It is poor that φ a, φ b, φ c are respectively the phase angle of step down side a, b, c three-phase voltage signal and current signal in the formula 1.
After the power P 2 of calculating transformer low-pressure side, get final product the electric energy W2 of calculating transformer low-pressure side,
W2=∫ P2 * Δ t (formula 2)
Δ t is the time of electric energy metrical in the formula 2.
Metrological supervision main frame WH1 also is installed on the transformer, and it is connected to the both sides of transformer respectively.Wherein, metrological supervision main frame WH1 is connected with A, the C two of transformer high-voltage side by high-tension current inductor CT1, CT2, and gathers A, current signal IA, the IC of C two-phase of transformer high-voltage side by high-tension current inductor CT1, CT2.Simultaneously, metrological supervision main frame WH1 also is connected with step down side a, b, c three, gather a and b between mutually line voltage signal Uab, c and the line voltage signal Ucb between the b phase.
In the present embodiment, the structural representation block diagram of metrological supervision main frame WH1 as shown in Figure 2.Metrological supervision main frame WH1 is provided with electrical signal collection module 12, electric energy computing module 13, comparison module 14 and communication module 15.
Electrical signal collection module 12 is connected with the transformer both sides respectively, gather current signal IA, the IC of transformer high-voltage side by high-tension current inductor CT1, CT2, and gather step down side voltage signal Uab, Ucb, voltage signal and the current signal of gathering is sent to electric energy computing module 13.
After electric energy computing module 13 receives current signal and voltage signal, the on high-tension side electric energy of calculating transformer.During electric energy computing module 13 calculating transformer high-pressure side electric energy, at first calculate its power P 1,
P1＝[Uab×IA×COS(φUabIA)+Ucb×IC×COS(φUcbIC)]×Ki
(formula 3)
In the formula 3, it is poor that φ UabIA, φ UcbIC are respectively the phase angle of transformer low voltage side line voltage signal Uab, Ucb and transformer high-voltage side current signal IA, IC.Ki is the transformer high-voltage side and the electrorheological ratio of low-pressure side, and its value is about 10k/380, promptly 26.3.
After the on high-tension side power P 1 of calculating transformer, get final product the on high-tension side electric energy W1 of calculating transformer,
W1=∫ P1 * Δ t (formula 4)
Δ t is the time of electric energy metrical in the formula 4.
Review Fig. 1, in the present embodiment, electric energy metering machine WH2 is connected with metrological supervision main frame WH1 by signal wire, and electric energy metering machine WH2 is to the energy data of metrological supervision main frame WH1 output transformer low-pressure side, and these data are sent in the comparison module 14 of metrological supervision main frame WH1.In the present embodiment, electric energy metering machine WH2 is sent to metrological supervision main frame WH1 with the electrical energy pulse signal form with the energy data of step down side.
The comparison module 14 of metrological supervision main frame WH1 not only receives the energy data from the step down side of electric energy metering machine WH2, also obtains the transformer high-voltage side energy data that calculates from electric energy computing module 13.
After comparison module 14 receives the energy data of transformer both sides, calculate the relative difference of both sides energy data.When calculating relative difference, the energy data that can use step down side also can use the energy data of transformer high-voltage side as standard value as standard value.If use the step down side energy data as standard value, the relative difference Δ of calculating is
Δ=[(W1-W2)/W2] * 100% (formula 5)
Through type 5 gets final product the relative difference of calculating transformer both sides energy data.
Simultaneously, comparison module 14 also stores a threshold value, threshold value can be determined according to the actual parameter of transformer, and consider that all there are certain error in transformer high-voltage side and electrorheological ratio, voltage change ratio and the phase place of low-pressure side, there be the error relevant during the transformer real work, therefore, need when determining threshold value suitably to increase with load, for example, in the present embodiment threshold value be ± 5%.Comparison module 14 compares relative difference and threshold value, if relative difference is less than threshold value, promptly the relative difference of transformer both sides energy data is in ± 5%, and metrological supervision main frame WH1 thinks electricity filching behavior does not take place.In case relative difference is greater than threshold value, comparison module 14 promptly generates warning message, and warning message is sent in the communication module 15.Communication module 15 receives warning message, sends warning message with wireless mode to Surveillance center.
Certainly, the electric-power metering monitor system also can adopt electricity load management terminal to send the mode of warning message.Like this, an electricity load management terminal need be installed on transformer, this electricity load management terminal is connected with the communication module of metrological supervision main frame WH1.After comparison module 14 generates warning message, be sent to electricity load management terminal by communication module 15, and warning message be sent to Surveillance center by electricity load management terminal.
This shows, metrological supervision main frame WH1 can compare the electric energy of transformer high-voltage side and low-pressure side, when only the relative difference of judging transformer both sides energy datas at comparison module 14 is greater than threshold value, when just abnormal conditions taking place, metrological supervision main frame WH1 just sends warning message to Surveillance center.Like this, Surveillance center does not need to receive a large amount of information, only receive the warning message that metrological supervision main frame WH1 sends, arithmetic capability, arithmetic speed to Surveillance center are less demanding, the cost of Surveillance center just reduces greatly, does not also need a large amount of technician that the ruuning situation of Surveillance center is monitored.
Simultaneously, in the present embodiment, metrological supervision main frame WH1 is connected to the both sides of transformer, and electrical signal collection module 12 is gathered the voltage signal of on high-tension side current signal and low-pressure side.Like this, metrological supervision main frame WH1 does not need to gather transformer high-voltage side voltage signal by costly high voltage potential transformer, reduces the expense cost of electric-power metering monitor system.
In the present embodiment, transformer is a Y-yn0 type substation transformer, during practical application, if transformer is a Dyn11 type transformer, then there is 30 ° phase differential between high pressure side line voltage U AB and the low pressure side line voltage U ab, during calculating transformer high-pressure side electric energy, get final product calculating after 30 ° of the voltage signal displacements.
By such scheme as seen, present embodiment can exercise supervision to multiple electricity filching behavior.Behavior for stealing between step down side and metrological supervision main frame WH1, the relative difference of the transformer high-voltage side electric energy that step down side electric energy that metrological supervision main frame WH1 calculates and electric energy metering machine WH2 calculate is bigger, and electricity filching behavior takes place in convenient judgement.
If the mode stealing of a certain phase voltage of step down side takes place to disconnect, metrological supervision main frame WH1 can judge on this mutually and have current signal but do not have voltage signal, and promptly the voltage signal of this phase is zero, can judge the generation of electricity filching behavior, metrological supervision main frame WH1 just sends warning message.
If the mode stealing of a certain phase current mutual inductor primary side of short circuit step down side takes place, perhaps, the mode stealing of disconnection or a certain phase current mutual inductor secondary side of short circuit, perhaps directly electricity consumption before current transformer, change current transformer ratio, modification electric energy metering machine WH2 electric energy metrical mode etc., metrological supervision main frame WH1 can judge that the relative difference of energy data of transformer both sides is bigger, and also can judge has electricity filching behavior.
For the remote control electricity filching behavior, metrological supervision main frame WH1 can be by the energy data of real-time judge transformer both sides, more promptly send warning message in case find transformer both sides energy data relative difference, the inspector can detect to determine whether to take place electricity filching behavior electric energy metrical targetedly.
Simultaneously, use the signal wire method stealing that disconnects electric energy metering machine WH2 and metrological supervision main frame WH1 for electricity filching person, can on the comparison module 14 of metrological supervision main frame WH1, store a time threshold, for example 30 seconds, comparison module 14 judges whether not receive the energy data from electric energy metering machine HW2 in time threshold, if then send alerting signal.
Monitoring for metrological supervision main frame WH1 fault, metrological supervision main frame WH1 can be set at regular intervals, sent contact signal as 2 hours to Surveillance center,, can judge that metrological supervision main frame WH1 breaks down if Surveillance center can not receive contact signal within a certain period of time.
Certainly, when metrological supervision main frame WH1 judges transformer both sides energy data relative difference greater than threshold value, electricity filching behavior taking place not necessarily, also may be that metrological supervision main frame WH1, electric energy metering machine WH2 or high-tension current inductor CT1, CT2 etc. break down.Like this, metrological supervision main frame WH1 also can send warning message, and promptly whether metrological supervision main frame WH1 also can supervise electric energy metering machine WH2 etc. and break down.
In addition, when metrological supervision main frame WH1 sends warning message, electrician and energy data, transformer high-voltage side energy data Trends Sheet etc. can also be sent to Surveillance center together,, be convenient to the electricity consumption situation of power department supervisory user so that Surveillance center obtains related data.
Certainly, in the foregoing description, the electrical signal collection module 12 of metrological supervision main frame WH1 is connected with the transformer both sides respectively, gather the current signal of transformer high-voltage side and the voltage signal of low-pressure side respectively, in the practical application of the present invention, metrological supervision main frame WH1 also can only be connected with the transformer high-voltage side.
Referring to Fig. 3, be the electrical schematic diagram of electric-power metering monitor system second embodiment of the present invention.In the present embodiment, electric energy metering machine WH3 is installed on the high-pressure side of transformer, electric energy metering machine WH3 is connected to A, the C two-phase of transformer high-voltage side by high-tension current inductor CT1, CT2, and gathers current signal IA, the IC of A, C two-phase.Simultaneously electric energy metering machine WH 3 also connects the high-pressure side of transformer by high voltage potential transformer TV1, TV2, gather high-pressure side A and B between mutually line voltage U AB, B and the line voltage U BC between the C phase.Like this, electric energy metering machine WH3 can calculating transformer high-pressure side electric energy.
Metrological supervision main frame WH4 is installed on step down side, metrological supervision main frame WH4 is connected to respectively on a, b, the c three-phase of step down side by low-voltage current mutual inductor TA1, TA2, TA3, and gathers current signal Ia, Ib, the Ic of step down side three-phase.Simultaneously, metrological supervision main frame WH4 also is connected with step down side a, b, c three, gathers a, b, c voltage in three phases signal Ua, Ub, Uc.Like this, metrological supervision main frame WH4 gets final product the electric energy of calculating transformer low-pressure side.Certainly, metrological supervision main frame WH4 also can use the voltage signal of electric energy metering machine WH3 and low-voltage current mutual inductor TA1, TA2, TA3, adopts the mode that is similar to an embodiment to calculate electric energy, does not repeat them here.
Identical with first embodiment is that electric energy metering machine WH3 is connected with metrological supervision main frame WH4, and the transformer high-voltage side energy data that calculates is sent to metrological supervision main frame WH4.Wherein the structured flowchart of metrological supervision main frame WH4 is identical with first embodiment, does not repeat them here.
After metrological supervision main frame WH4 receives the step down side energy data of transformer high-voltage side energy data that electric energy metering machine WH3 transmits and own calculating, the relative difference of calculating transformer both sides energy data, in case generation abnormal conditions, be relative difference greater than threshold value, send warning message to Surveillance center.
This shows, the warning message that the just metrological supervision main frame WH4 that Surveillance center receives sends, Surveillance center does not just need to handle lot of data, and its cost reduces greatly, also can monitor the electric energy situation of transformer both sides in real time simultaneously.
Certainly, in the present embodiment, metrological supervision main frame WH4 calculating transformer low-pressure side electric energy, electric energy metering machine WH3 calculating transformer high-pressure side electric energy.During practical application, can be by metrological supervision main frame WH4 calculating transformer high-pressure side electric energy, and electric energy metering machine WH3 calculating transformer low-pressure side electric energy can be realized purpose of the present invention equally.
Simultaneously, electric energy metering machine WH3 is connected with metrological supervision main frame WH4 by wired mode, also can be to connect by wireless mode.When using wireless mode to connect, electric energy metering machine WH3 is sent to metrological supervision main frame WH4 with energy data in the mode of wireless signal.
In addition, in the foregoing description, the energy data that electric energy metering machine WH3 transmits is the form transmission with the electrical energy pulse signal, during practical application, can also send the electric energy metrical value that electric energy metering machine WH3 calculates, promptly electric energy metering machine WH3 calculates the actual computation value of the transformer high-voltage side electric energy that obtains.
From two above-mentioned embodiment as can be seen, electric-power metering measure of supervision of the present invention is in first side of transformer electric energy metering machine, the electric energy of calculating transformer first side to be installed.And metrological supervision main frame, the calculating transformer second side electric energy be installed on transformer.
Behind the electric energy metering machine calculating transformer first side electric energy, the energy data that calculates is sent to the metrological supervision main frame.The electric energy of metrological supervision main frame calculating transformer both sides, the relative difference of acquisition both sides energy data.Simultaneously, the metrological supervision main frame also stores a threshold value, and the metrological supervision main frame is by contrast relative difference and threshold value, if find relative difference greater than threshold value, promptly thinks the generation abnormal conditions, sends warning message to Surveillance center.
Certainly, the metrological supervision main frame is provided with the electrical signal collection module, is used to gather the voltage signal and the current signal of transformer.Acquisition module can be connected with the transformer both sides, gather the current signal of transformer one side and the voltage signal of opposite side respectively, can be connected to a wherein side of transformer yet, only gather the transformer wherein voltage signal and the current signal of a side, these do not influence enforcement of the present invention.
This shows that the metrological supervision method can be gathered the electric signal of transformer both sides in real time, the electric energy of real-time calculating transformer both sides, and when abnormal conditions occurring, send warning message.Surveillance center receives only warning message, does not need to handle lot of data, and its cost can reduce greatly.Simultaneously, the metrological supervision main frame can also effectively exercise supervision to multiple electricity filching behavior.
At last, it is emphasized that to the invention is not restricted to above-mentioned embodiment, also should be included in protection scope of the present invention such as the change of threshold value, the change of warning message send mode, the subtle change such as change of metrological supervision main frame installation site.
Claims (5)
1. the electric-power metering monitor system comprises
Electric energy metering machine is used for the electric energy of calculating transformer low-pressure side;
It is characterized in that:
The metrological supervision main frame is used for the on high-tension side electric energy of calculating transformer, is provided with
The electrical signal collection module is connected with the transformer both sides, gathers the voltage signal and the on high-tension side current signal of step down side respectively;
The electric energy computing module is used to receive from the low-pressure side voltage signal and the high voltage side current signal of electrical signal collection module and calculates the electric energy of described transformer high-voltage side;
Comparison module, store a threshold value, be used to obtain the energy data from electric energy metering machine, and calculate the energy data of electric energy metering machine input and the relative difference of the energy data that the electric energy computing module calculates, described relative difference generates warning message during greater than described threshold value;
Communication module is used to send described warning message.
2. electric-power metering monitor system according to claim 1 is characterized in that:
Also comprise a Surveillance center and the electricity load management terminal that is connected with the metrological supervision main frame;
Described communication module is sent to electricity load management terminal with warning message, and by electricity load management terminal warning message is sent to Surveillance center.
3. electric-power metering monitor system according to claim 1 and 2 is characterized in that:
The energy data of described electric energy metering machine output is electrical energy pulse signal or electric energy metrical value.
4. according to the electric-power metering measure of supervision of the described electric-power metering monitor system of claim 1, comprise
Low-pressure side at transformer is installed electric energy metering machine, uses the electric energy of this electric energy metering machine calculating transformer low-pressure side;
The metrological supervision main frame is installed on transformer, is used the on high-tension side electric energy of this metrological supervision main frame calculating transformer, described metrological supervision host stores has a threshold value;
The metrological supervision main frame obtains the energy data of the step down side of electric energy metering machine calculating, and the relative difference of the energy data of calculating transformer low-pressure side and transformer high-voltage side energy data, and judge that this relative difference whether greater than described threshold value, in this way, sends warning message.
5. electric-power metering measure of supervision according to claim 4 is characterized in that:
Described metrological supervision host stores has a time threshold value;
The metrological supervision main frame judges whether not receive the energy data from electric energy metering machine in time threshold, in this way, send warning message.
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| CN111147545A (en) * | 2019-11-29 | 2020-05-12 | 沈阳航空航天大学 | Intelligent electricity stealing prevention system based on NB-IoT |
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| CN2476030Y (en) * | 2001-03-21 | 2002-02-06 | 陈劲游 | High voltage electric energy metering fault recording device |
| CN1419131A (en) * | 2002-12-18 | 2003-05-21 | 王荣安 | Intelligent fraudulent use prevention electric energy measuring method and device thereof |
| CN1866033A (en) * | 2005-05-20 | 2006-11-22 | 湖南泰通电力科技有限公司 | Real-time monitoring system for preventing electricity theft for power network |
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