CN2476030Y - High voltage electric energy metering fault recording device - Google Patents
High voltage electric energy metering fault recording device Download PDFInfo
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- CN2476030Y CN2476030Y CN 01215733 CN01215733U CN2476030Y CN 2476030 Y CN2476030 Y CN 2476030Y CN 01215733 CN01215733 CN 01215733 CN 01215733 U CN01215733 U CN 01215733U CN 2476030 Y CN2476030 Y CN 2476030Y
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Abstract
The utility model relates to a high voltage electric measurement failure recorder, comprising an electric meter(1), a sampling circuit(2), an interface circuit(3), an intelligent analyzing comparator(4) and a peripheral equipment(5). A sampling signal is input to the intelligent analyzing comparator(4) by the sampling circuit(2) through the interface circuit(3). A measurement date is imput to the intelligent analyzing comparator(4) by the electric meter(1) and processed by the intelligent analyzing comparator(4), then the date is output to the exterior equipment. The utility model has the advantages of complete checking and analysis for any high voltage failures and giving an alarm, therefore reducing the economic lose to the power supply users causing by the failures, reducing the workload of the failure processing personnel, and saving the rush harvest time.
Description
The utility model relates to electric power, electric power meter, relates in particular to a kind of high-voltage electric energy measurement failure recording device.
At present, there are the following problems for high-voltage electric energy measurement: the composition error of verification high-voltage electric energy measurement at the scene, usually error that can only the field-checking electric energy meter, and to judge that whether the whole high pressure measurement device that comprises current transformer and voltage transformer (VT) etc. has fault is cumbersome, the general power consumer of wanting cooperates power failure, then to current transformer and voltage transformer (VT) verification one by one, not only workload is big, and main be in time to find metering fault, often bring very big economic loss to power supply enterprise.Existing as: " decompression calculagraph ", " stop-loss pressure calculagraph ", can only detection record " decompression " or time of " certain phase current disconnects or short circuit ", function is few, can not monitor the fault of measuring apparatus comprehensively, and the situation of not having good luck after false alarm or the action often appears in poor-performing; High pressure measurement is multi-point and wide-ranging, and is installed in power consumer the inside, record electricity user's power consumption at every moment, and one has fault, will cause very big economic loss.The power consumer that has adopts various technological meanses to come stealing in order to pay tariff less.How to find in time whether the high pressure measurement device has fault or be puzzlement power supply enterprise technical barrier for many years by the electric weight that people's stealing and recovery are counted less.
The purpose of this utility model provides a kind of high-voltage electric energy measurement failure recording device, it is on the basis of original high pressure measurement, in the appearance of the low-pressure side of transformer, connect one group of low-voltage current mutual inductor, with the secondary current on the low-voltage current mutual inductor, step down side outlet voltage and their phase place, power, the secondary current of the mutual inductor of electric weight and transformer high-voltage side, voltage, phase place, power, electric weight compares, the data of also watt-hour meter being measured are sent to the intellectual analysis comparer with the form of electric pulse and handle simultaneously, analyze various faults and warning then, write down relevant data, so that the timely handling failure of metrological personnel and the subsequent collection electricity charge reduce the electricity charge loss that causes because of metering fault.
The utility model is achieved by the following technical solution: it comprises that is used to a voltage transformer pt 1 that measures the watt-hour meter of transformer high-voltage side power consumption and be used for the measuring transformer high side voltage, PT2 and the current transformer CT3 that is used for the measuring transformer high voltage side current, CT4, it also comprises sample circuit in addition, interface circuit, intellectual analysis comparer and external unit, sample circuit is by the mutual inductor PT1 on the incoming line of transformer high-voltage side, PT2, CT3, the CT4 measuring-signal, and carry out signal sampling from the low-voltage line that transformer comes out, sample circuit is input to the intellectual analysis comparer by interface circuit with sampled signal, watt-hour meter is input to the intellectual analysis comparer with the data of measuring, and the intellectual analysis comparer outputs to external unit after the data of sampling are handled.
Above-mentioned described interface circuit comprises sampling maintenance, analog switch and A/D converter.
Above-mentioned described intellectual analysis comparer can be to have the RAM of storer and the central processor CPU of ROM.
Above-mentioned described intellectual analysis comparer can be a single-chip microcomputer, also can be digital signal processor DSP.
Above-mentioned described external unit can be LCD, alarm or printer etc.
The utility model compared with prior art has following advantage: energy complete detection and the various faults that analyze high pressure measurement, and send alerting signal immediately, and record and the voltage when showing fault, electric current, electric weight and time etc., so that the timely handling failure of metrological personnel and hand in the electricity charge retroactively, reduce and hinder the economic loss of causing for the power supply user for some reason, owing to analyze various faults, therefore the fault handling personnel can have procuratorial work of pin ground and handling failure, alleviated fault handling personnel's workload greatly, saved the time of getting the harvest in quickly, avoid bringing bigger economic loss to the power supply user, while also can not hinder for some reason and take into account Lou meter power supply user's power consumption less, has guaranteed the economic interests of power supply enterprise.
Below in conjunction with accompanying drawing the utility model is done detailed explanation:
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is the more specifically circuit block diagram of Fig. 1;
Fig. 3 is the circuit diagram of the sample circuit part of Fig. 2.
As shown in Figure 1, the utility model comprises that one is used to measure the watt-hour meter (1) of transformer (9) high-pressure side power consumption and the voltage transformer pt 1 that is used for measuring transformer (9) high side voltage, PT2 and the current transformer CT3 that is used for measuring transformer (9) high voltage side current, CT4, it also comprises sample circuit (2) in addition, interface circuit (3), intellectual analysis comparer (4) and external unit (5), sample circuit (2) is by the mutual inductor PT1 on the on high-tension side incoming line of transformer (9), PT2, CT3, the CT4 measuring-signal, and the low-voltage line that comes out from transformer (9) carries out signal sampling, sample circuit (2) is input to intellectual analysis comparer (4) by interface circuit (3) with sampled signal, watt-hour meter (1) is input to intellectual analysis comparer (4) with the data of measuring, and intellectual analysis comparer (4) outputs to external unit (5) after the data of sampling are handled.Interface circuit comprises that sampling keeps (6), analog switch (7) and A/D converter (8).
As Fig. 2, shown in Figure 3, intellectual analysis comparer (4) can be to have the RAM of storer and the central processor CPU of ROM; Intellectual analysis comparer (4) can be a single-chip microcomputer, also can be digital signal processor DSP.External unit (5) can be LCD, alarm or printer etc.
When high pressure measurement is broken down, such as: current mulual inductor malfunction, the voltage transformer (VT) fault, the secondary circuit open circuit, short circuit, change the no-load voltage ratio of current transformer privately, blown fuse, watt-hour meter breaks down etc., the actual power consumption that watt-hour meter (1) electric weight that is measured and the pulse of sending and low-pressure side are measured is not inconsistent, there is fault thereby detect, again according to transformer (9) height, the electric current of low-pressure side, voltage, the relation of phase place is differentiated out of order concrete position and situation, and voltage during with fault, size of current and phase place and electric weight are noted, send alerting signal simultaneously, so that timely handling failure and remedy the electricity charge.
Principle of work of the present utility model is as follows: as Fig. 2, shown in Figure 3, sample circuit (2) comprises mutual inductor PT1, PT2, CT3, CT4, CT5, CT6, CT7 and high pressure insurance 1RD, 2RD, 3RD, 4RD, 5RD, 6RD, and voltage transformer pt 1, PT2 measure voltage signal U from the high-pressure side of transformer (9)
a, U
b, U
c, current transformer CT3, CT4 measure current signal I from the high-pressure side of transformer (9)
a +, I
c +, I
a -, I
c -, sample circuit (2) is directly measured voltage signal U from the low-pressure side of transformer (9)
a, U
b, U
c, U
N, current transformer CT5, CT6, CT7 measure current signal I from the low-pressure side of transformer (9)
a +, I
b +, I
c +, I
a -, I
b -, I
c -The voltage signal of all collections all passes through a scale operation circuit (10) and enters in the sampling maintenance (6), the current signal of same phase is converted to voltage signal by current-to-voltage converter (11) and is input in the sampling maintenance (6), and then be input among the CPU and handle, the data after last CPU will handle output in alarm (5) and the LCD external units such as (5).Watt-hour meter (1) is given CPU with the form of pulse by signal wire with the electric weight that is measured.The instantaneous value of the sampled signal after CPU control sampling keeps (6) to conversion carries out synchronized sampling, and the analog signal conversion that control analog switch (7) and A/D converter (8) will be sampled in the maintenance (6) is digital signal, CPU in the cycle of an AC signal to each phase signals sample conversion N time all.Can calculate real effective and the mean value and the average power of each phase voltage, electric current according to the Fourier transform DFT of discrete mathematics, CPU also counts the input pulse of watt-hour meter (1), and the position of fault and fault is relatively judged in the analysis of passing through then.RAM is a data-carrier store, and EPROM is a program storage, and EEPROM is electric erasable program storage.
Now lift a fault actions example explanation, if any the people for stealing, in three high pressure insurances, the resistance of connecting respectively, the resistance of connecting is in order to increase the voltage drop of insurance, to use because the high pressure insurance also has because of long-term, insuring the increase that aged deterioration causes the voltage drop of insurance, so only the verification electric energy meter error is to be difficult to find that this stealing mode is very hidden.If the high side voltage of transformer is 10kV, the pressure drop of insurance has its 10%, and then voltage transformer pt primary side voltage has just lacked 10%, so the pulse of watt-hour meter institute's quantity calculation and watt-hour meter output also can lack 10%.And voltage, the electric current of step down side are still normally at this moment, and comparer calculates step down side power and electric weight also will be normal.Counted 10% electric weight less by relatively just finding the high-pressure side watt-hour meter.Can judge that fault has taken place in high pressure measurement.Again according to the voltage of low-pressure side, actual no-load voltage ratio and the load current and the power factor of transformer institute contact head, can calculate the virtual voltage of transformer high-voltage side, just can find that voltage that the high-pressure side is surveyed has lacked 10% with the voltage ratio of the transformer high-voltage side of being surveyed, get final product failure judgement go out on high-tension side voltage transformer pt 1, PT2, high pressure insure and the circuit that connected in.The prompting metrological personnel is checked above-mentioned part emphasis.The electric weight of time during simultaneously with fault and voltage, electric current, the time dependent curve of power and few meter is noted, so that remedy the electric weight and the electricity charge thereof.The electric weight of few meter can be calculated as follows:
Few quantity calculation=(the low-pressure side electric weight+loss on transmission of comparer record)
-watt-hour meter is at fault time institute quantity calculation
Claims (6)
1, the high-voltage electric energy measurement failure recording device, comprise that one is used to measure the watt-hour meter (1) of the on high-tension side power consumption of transformer (9) and the voltage transformer pt 1 that is used for measuring transformer (9) high side voltage, PT2 and the current transformer CT3 that is used for measuring transformer (9) high voltage side current, CT4, it is characterized in that it also comprises sample circuit (2), interface circuit (3), intellectual analysis comparer (4) and external unit (5), sample circuit (2) is by the mutual inductor PT1 on the on high-tension side incoming line of transformer (9), PT2, CT3, the CT4 measuring-signal, and the low-voltage line that comes out from transformer (9) carries out signal sampling, sample circuit (2) is input to intellectual analysis comparer (4) by interface circuit (3) with sampled signal, watt-hour meter (1) is input to intellectual analysis comparer (4) with the data of measuring, and intellectual analysis comparer (4) outputs to external unit (5) after the data of sampling are handled.
2, high-voltage electric energy measurement failure recording device according to claim 1 is characterized in that wherein interface circuit comprises that sampling keeps (6), analog switch (7) and A/D converter (8).
3, high-voltage electric energy measurement failure recording device according to claim 1 is characterized in that external unit (5) can be LCD, alarm or printer etc.
4,, it is characterized in that intellectual analysis comparer (4) can be to have the RAM of storer and the central processor CPU of ROM according to claim 1,2 or 3 described high-voltage electric energy measurement failure recording devices.
5,, it is characterized in that intellectual analysis comparer (4) can be a single-chip microcomputer according to claim 1,2 or 3 described high-voltage electric energy measurement failure recording devices.
6,, it is characterized in that intellectual analysis comparer (4) can be a digital signal processor DSP according to claim 1,2 or 3 described high-voltage electric energy measurement failure recording devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01215733 CN2476030Y (en) | 2001-03-21 | 2001-03-21 | High voltage electric energy metering fault recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01215733 CN2476030Y (en) | 2001-03-21 | 2001-03-21 | High voltage electric energy metering fault recording device |
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| Publication Number | Publication Date |
|---|---|
| CN2476030Y true CN2476030Y (en) | 2002-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01215733 Expired - Fee Related CN2476030Y (en) | 2001-03-21 | 2001-03-21 | High voltage electric energy metering fault recording device |
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| CN (1) | CN2476030Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266263B (en) * | 2008-05-10 | 2011-01-12 | 珠海市华优电气技术有限公司 | Electric power metrological supervision system and supervision method |
| CN101297202B (en) * | 2005-10-25 | 2011-07-06 | 西门子公司 | Method for generating data group, on-the-spot apparatus and system for collecting electric energy quality of electric power supply system |
| CN102540134A (en) * | 2011-12-30 | 2012-07-04 | 李景禄 | Intelligent metering and monitoring system |
| CN101629976B (en) * | 2008-07-17 | 2014-04-30 | 湖北盛佳电器设备有限公司 | Structure of electric energy metering assembly |
| CN104391145A (en) * | 2014-12-03 | 2015-03-04 | 广东电网有限责任公司茂名供电局 | Online low voltage detection device for electric leakage and electric energy steal and implement method thereof |
| CN108776252A (en) * | 2018-04-12 | 2018-11-09 | 山东钢铁股份有限公司 | The metering secondary current circuit of main transformer |
| CN108896952A (en) * | 2018-05-21 | 2018-11-27 | 华立科技股份有限公司 | Power grid exception simulated testing system and its test method |
| CN117871943A (en) * | 2024-03-13 | 2024-04-12 | 保定朗信电子科技有限公司 | Split type high-voltage electric energy metering method and system |
-
2001
- 2001-03-21 CN CN 01215733 patent/CN2476030Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101297202B (en) * | 2005-10-25 | 2011-07-06 | 西门子公司 | Method for generating data group, on-the-spot apparatus and system for collecting electric energy quality of electric power supply system |
| CN101266263B (en) * | 2008-05-10 | 2011-01-12 | 珠海市华优电气技术有限公司 | Electric power metrological supervision system and supervision method |
| CN101629976B (en) * | 2008-07-17 | 2014-04-30 | 湖北盛佳电器设备有限公司 | Structure of electric energy metering assembly |
| CN102540134A (en) * | 2011-12-30 | 2012-07-04 | 李景禄 | Intelligent metering and monitoring system |
| CN104391145A (en) * | 2014-12-03 | 2015-03-04 | 广东电网有限责任公司茂名供电局 | Online low voltage detection device for electric leakage and electric energy steal and implement method thereof |
| CN104391145B (en) * | 2014-12-03 | 2016-05-11 | 广东电网有限责任公司茂名供电局 | Online low-voltage leakage power stealing testing arrangement and its implementation |
| CN108776252A (en) * | 2018-04-12 | 2018-11-09 | 山东钢铁股份有限公司 | The metering secondary current circuit of main transformer |
| CN108776252B (en) * | 2018-04-12 | 2024-05-28 | 山东钢铁股份有限公司 | Metering secondary current loop of main transformer |
| CN108896952A (en) * | 2018-05-21 | 2018-11-27 | 华立科技股份有限公司 | Power grid exception simulated testing system and its test method |
| CN108896952B (en) * | 2018-05-21 | 2020-06-26 | 华立科技股份有限公司 | Power grid abnormity simulation test system and test method thereof |
| CN117871943A (en) * | 2024-03-13 | 2024-04-12 | 保定朗信电子科技有限公司 | Split type high-voltage electric energy metering method and system |
| CN117871943B (en) * | 2024-03-13 | 2024-05-24 | 保定朗信电子科技有限公司 | Split type high-voltage electric energy metering method and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |