CN104614565A - Method for determining abnormal short circuit and electricity stealing of current incoming line loop of electric energy meter - Google Patents
Method for determining abnormal short circuit and electricity stealing of current incoming line loop of electric energy meter Download PDFInfo
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- CN104614565A CN104614565A CN201510052115.XA CN201510052115A CN104614565A CN 104614565 A CN104614565 A CN 104614565A CN 201510052115 A CN201510052115 A CN 201510052115A CN 104614565 A CN104614565 A CN 104614565A
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Abstract
The invention relates to a method for determining abnormal short circuit and electricity stealing of a current incoming line loop of an electric energy meter. The method comprises the steps of (1) adding to a special amplitude value and frequency voltage signal to the current incoming line loop of the electric energy meter; (2) acquiring current from the current incoming line loop of the electric energy meter, extracting a current signal corresponding to the added voltage signal, and sending the extracted signal to the microprocessor MCU; (3) presetting the current value in the microprocessor MCU, comparing the current amplitude of the extracted signal with the preset current value, and determining the abnormal state to obtain the result; (4) generating abnormal state alarm through the microprocessor MCU. With the adoption of the method for determining abnormal short circuit and electricity stealing of the current incoming line loop of the electric energy meter, the short circuit state of the current incoming line can be effectively detected, abnormal electricity consumption of users can be found out on real time, and the abnormal behavior can be recorded.
Description
Technical field
The invention belongs to anti-theft electricity technology field, especially a kind of method of electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit.
Background technology
Intelligent electric energy meter has that oneself power consumption is low, the feature of feature richness, and takes certain measures of anti-stealing electricity.The logout content that its storage decompression, defluidization, disconnected phase, game clock lid etc. enrich, timing can be realized freeze, instantaneously to freeze, arrange to freeze, the load curve data of long period can be stored, for power department is discovered and seized electricity filching behavior, reviewed the foundation that electric quantity loss provides favourable.
But, intelligent electric energy meter metering accuracy is based upon to carry out on the basis of correct measurement to voltage and current, if power consumer implements transformation from outside to circuit, when making the current value of the magnitude of voltage of intelligent electric meter voltage inlet wire and electric current inlet wire correctly can not reflect actual electricity consumption load voltage current value, the accuracy of metering is destroyed.In the application of reality, by from outside short circuit intelligent electric energy meter electric current inlet wire, cause intelligent electric energy meter have good luck less or do not have good luck, the behavior implementing stealing happens occasionally.
Therefore, abnormality detection is carried out to the impedance of electric current inlet wire, judge whether the generation of electric current inlet wire short circuit situation, for anti-electricity-theft important in inhibiting.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method of electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
A method for electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit, method step is as follows:
(1) on electric energy meter current wire inlet loop, apply the voltage signal of an amplitude and specific and frequency; Concrete grammar is: utilize Micro-processor MCV to control a voltage signal generation circuit, produce the voltage signal of an amplitude and specific and frequency, described voltage signal generation circuit is connected with voltage signal coupled circuit, the voltage signal of amplitude and specific and frequency is flowed to voltage signal coupled circuit, and the voltage signal of amplitude and specific and frequency is coupled on electric energy meter current inlet wire by voltage signal coupled circuit;
(2) electric current on electric energy meter current wire inlet loop is gathered, extract above-mentioned steps apply current signal corresponding to voltage signal, concrete grammar is: on electric energy meter current wire inlet loop, connect a current signal Acquisition Circuit, gather the current signal on electric energy meter current inlet wire, current signal Acquisition Circuit is connected with a current signal filtering circuit, the current signal that the voltage signal that above-mentioned steps applies by current signal filtering circuit is corresponding extracts, and the signal extracted is sent to Micro-processor MCV;
(3) pre-set current value in Micro-processor MCV, the current amplitude and the pre-set current value that said extracted are gone out signal compare, and make abnormality judged result;
(4) Micro-processor MCV sends exceptional state alarm;
First the current amplitude abnormality data extracting signal are stored in the external storage unit of Micro-processor MCV by Micro-processor MCV, and record corresponding time data, simultaneously, Micro-processor MCV passes through I/O interface to electric administrative center output alarm level signal, or Micro-processor MCV by built-in GPRS module to electric administrative center output alarm level signal, meanwhile, detected intelligent electric energy meter uploads the related data of self.
And the amplitude of the amplitude and specific that in described step (1), Micro-processor MCV control voltage signal generating circuit produces and the voltage signal of frequency is 1V, and frequency is 10KHz.
And in described step (2), the centre frequency of current signal filtering circuit is 10KHz, and bandwidth is 1KHz.
And the concrete grammar of making abnormality judged result in described step (3) is:
1. pre-set current value in Micro-processor MCV, the size of pre-set current value is 20mA;
2. in Micro-processor MCV, first A/D conversion is carried out to the current signal extracted, determine the current amplitude extracting signal;
3. pre-set current value in the current amplitude of extraction signal and Micro-processor MCV being compared, when extracting the current amplitude >=pre-set current value 20% of signal, being judged to be that electric current wire inlet loop is abnormal.
Advantage of the present invention and good effect are:
The invention provides a kind of method of electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit, this method effectively can detect the short circuit state of electric current inlet wire, finds the abnormal electricity consumption of user in real time, and the generation of recording exceptional behavior.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the inventive method institute application circuit.
Embodiment
Be further described the invention process below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A method for electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit, as shown in Figure 1, the step of the method is as follows:
(1) on intelligent electric energy meter electric current wire inlet loop, apply the voltage signal of an amplitude and specific and frequency; Concrete grammar is: utilize Micro-processor MCV to control a voltage signal generation circuit, produce the voltage signal of an amplitude and specific and frequency, described voltage signal generation circuit is connected with voltage signal coupled circuit, the voltage signal of amplitude and specific and frequency is flowed to voltage signal coupled circuit, and the voltage signal of amplitude and specific and frequency is coupled on intelligent electric energy meter electric current inlet wire by voltage signal coupled circuit;
(2) electric current on intelligent electric energy meter electric current wire inlet loop is gathered, extract above-mentioned steps apply current signal corresponding to voltage signal, concrete grammar is: on electric energy meter current wire inlet loop, connect a current signal Acquisition Circuit, gather the current signal on electric energy meter current inlet wire, current signal Acquisition Circuit is connected with a current signal filtering circuit, the current signal that the voltage signal of the characteristic frequency that above-mentioned steps applies by current signal filtering circuit is corresponding extracts, and the signal extracted is sent to Micro-processor MCV;
(3) pre-set current value in Micro-processor MCV, the current amplitude and the pre-set current value that said extracted are gone out signal compare, and make abnormality judged result; Concrete grammar is:
1. pre-set current value in Micro-processor MCV, the size of pre-set current value is 20mA,
2. in Micro-processor MCV, first A/D conversion is carried out to the current signal extracted, determine the current amplitude extracting signal;
3. pre-set current value in the current amplitude of extraction signal and Micro-processor MCV is compared,
When extracting the current amplitude >=pre-set current value 20% of signal, be judged to be that electric current wire inlet loop is abnormal;
(4) Micro-processor MCV sends exceptional state alarm;
First the current amplitude abnormality data extracting signal are stored in the external storage unit of Micro-processor MCV by Micro-processor MCV, and record corresponding time data, simultaneously, Micro-processor MCV passes through I/O interface to electric administrative center output alarm level signal, or Micro-processor MCV by built-in GPRS module to electric administrative center output alarm level signal, meanwhile, detected intelligent electric energy meter uploads the related data of self.
In specific embodiment of the invention, the amplitude of the amplitude and specific that in described step (1), Micro-processor MCV control voltage signal generating circuit produces and the voltage signal of frequency is 1V, and frequency is 10KHz.
In specific embodiment of the invention, in described step (2), the centre frequency of current signal filtering circuit is 10KHz, and bandwidth is 1KHz.
Claims (4)
1. a method for electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit, is characterized in that method step is as follows:
(1) on electric energy meter current wire inlet loop, apply the voltage signal of an amplitude and specific and frequency; Concrete grammar is: utilize Micro-processor MCV to control a voltage signal generation circuit, produce the voltage signal of an amplitude and specific and frequency, described voltage signal generation circuit is connected with voltage signal coupled circuit, the voltage signal of amplitude and specific and frequency is flowed to voltage signal coupled circuit, and the voltage signal of amplitude and specific and frequency is coupled on electric energy meter current inlet wire by voltage signal coupled circuit;
(2) electric current on electric energy meter current wire inlet loop is gathered, extract above-mentioned steps apply current signal corresponding to voltage signal, concrete grammar is: on electric energy meter current wire inlet loop, connect a current signal Acquisition Circuit, gather the current signal on electric energy meter current inlet wire, current signal Acquisition Circuit is connected with a current signal filtering circuit, the current signal that the voltage signal that above-mentioned steps applies by current signal filtering circuit is corresponding extracts, and the signal extracted is sent to Micro-processor MCV;
(3) pre-set current value in Micro-processor MCV, the current amplitude and the pre-set current value that said extracted are gone out signal compare, and make abnormality judged result;
(4) Micro-processor MCV sends exceptional state alarm;
First the current amplitude abnormality data extracting signal are stored in the external storage unit of Micro-processor MCV by Micro-processor MCV, and record corresponding time data, simultaneously, Micro-processor MCV passes through I/O interface to electric administrative center output alarm level signal, or Micro-processor MCV by built-in GPRS module to electric administrative center output alarm level signal, meanwhile, detected intelligent electric energy meter uploads the related data of self.
2. the method for the electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit belonging to claim 1, it is characterized in that: the amplitude of the amplitude and specific that in described step (1), Micro-processor MCV control voltage signal generating circuit produces and the voltage signal of frequency is 1V, and frequency is 10KHz.
3. the method for the electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit belonging to claim 1, is characterized in that: in described step (2), the centre frequency of current signal filtering circuit is 10KHz, and bandwidth is 1KHz.
4. the method for the electric energy meter current wire inlet loop abnormality juding fraudulent use electricity by short-circuit belonging to claim 1, is characterized in that: the concrete grammar of making abnormality judged result in described step (3) is:
1. pre-set current value in Micro-processor MCV, the size of pre-set current value is 20mA;
2. in Micro-processor MCV, first A/D conversion is carried out to the current signal extracted, determine the current amplitude extracting signal;
3. pre-set current value in the current amplitude of extraction signal and Micro-processor MCV being compared, when extracting the current amplitude >=pre-set current value 20% of signal, being judged to be that electric current wire inlet loop is abnormal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107817463A (en) * | 2017-11-20 | 2018-03-20 | 国网福建省电力有限公司 | A kind of electricity anti-theft method for detecting short circuit electric energy meter |
| CN108051627A (en) * | 2017-11-20 | 2018-05-18 | 国网福建省电力有限公司 | A kind of burglar-proof electric circuit for detecting short circuit electric energy meter |
| CN109142831A (en) * | 2018-09-21 | 2019-01-04 | 国网安徽省电力公司电力科学研究院 | A kind of resident's exception electricity consumption analysis method and device based on impedance analysis |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107817463A (en) * | 2017-11-20 | 2018-03-20 | 国网福建省电力有限公司 | A kind of electricity anti-theft method for detecting short circuit electric energy meter |
| CN108051627A (en) * | 2017-11-20 | 2018-05-18 | 国网福建省电力有限公司 | A kind of burglar-proof electric circuit for detecting short circuit electric energy meter |
| CN109142831A (en) * | 2018-09-21 | 2019-01-04 | 国网安徽省电力公司电力科学研究院 | A kind of resident's exception electricity consumption analysis method and device based on impedance analysis |
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Application publication date: 20150513 |