CN104122825A - Intelligent electric quantity sampling device - Google Patents
Intelligent electric quantity sampling device Download PDFInfo
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- CN104122825A CN104122825A CN201410373348.5A CN201410373348A CN104122825A CN 104122825 A CN104122825 A CN 104122825A CN 201410373348 A CN201410373348 A CN 201410373348A CN 104122825 A CN104122825 A CN 104122825A
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Abstract
The invention relates to the power field, in particular to an intelligent electric quantity sampling device. The intelligent electric quantity sampling device comprises a current mutual-induction module used for converting a three-phase current to a milliampere-scale current, and converting the milliampere-scale current to a first low-voltage signal through current-voltage conversion, and an electric quantity sampling module used for acquiring the first low-voltage signal. The three-phase current is converted to the low-voltage signal through the current mutual-induction module, and used by the electric quantity sampling module for sampling, thus improving the safety of electric quantity sampling, and solving the problem of high potential safety hazards due to that a current mutual inductor with high current output is adopted in the prior art, an instrument is accessed through secondary wiring to carry out electric quantity sampling, and the secondary side of the current mutual inductor is open to generate a high voltage and cause accidents.
Description
Technical field
The present invention relates to power domain, in particular to intelligent power sampling apparatus.
Background technology
Often need to gather parameters of electric power in low-voltage distribution field, as the parameters such as three-phase current, three-phase voltage, electricity, frequency, switching value are gathered.Due to the on-the-spot general simulating signal that uses of electric parameter acquisition, disturb larger.For anti-interference, in prior art, generally adopt the current transformer of large electric current (ampere level) output, then join conventional electric power instrument (or pointer graduation apparatus) parameters of electric power is gathered.
In prior art, current transformer accesses electric instrument by the mode of secondary side connecting line pressure conversion and measurement are sampled, flowed to three-phase current, because the electric current of current transformer output is larger, if Current Transformer Secondary side open circuit, will produce high pressure and cause accident, have larger potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of intelligent power sampling apparatus, to solve the above problems.
A kind of intelligent power sampling apparatus is provided in an embodiment of the present invention, has comprised: Current Mutual Inductance module, for three-phase current being converted to milliampere to a level electric current, and press by stream that to change milliampere level current conversion be the first low voltage signal; Electric weight sampling module, for gathering the first low voltage signal.
Further, this intelligent power sampling apparatus also comprises: voltage transformation module, for three-phase voltage being converted to the second low voltage signal, delivery sampling module gathers.
Further, this intelligent power sampling apparatus also comprises: electric weight acquisition module, for according to the first low voltage signal and the second low voltage signal that gather, obtains the information about power of three-phase current and three-phase voltage, and information about power is stored.
Further, this intelligent power sampling apparatus also comprises: switching value modular converter, for the switching value signal of input is isolated and is converted to Transistor-Transistor Logic level signal by photoelectricity, delivery acquisition module obtains the also information of storage switch amount.
Further, this intelligent power sampling apparatus also comprises: communication module, for by digital protocol by the communication of information about power and switching value to terminal.
Further, digital protocol includes but not limited to: Rs485, Can, Lan, Rs232 and Rs422.
Further, electric weight sampling module is electrically connected with electric weight acquisition module by SPI interface; Electric weight acquisition module is electrically connected with communication module by TTL serial ports.
The intelligent power sampling apparatus that the embodiment of the present invention provides, by Current Mutual Inductance module, three-phase current is converted to low voltage signal, delivery sampling module is sampled, improve the security of electric weight sampling, solve the current transformer of available technology adopting High-current output, accessed instrument by secondary connection and carry out electric weight sampling, Current Transformer Secondary side open circuit, produce high pressure and cause accident, have the problem of larger potential safety hazard.
Brief description of the drawings
Fig. 1 shows the structured flowchart of the first embodiment of intelligent power sampling apparatus of the present invention;
Fig. 2 shows the structured flowchart of the second embodiment of intelligent power sampling apparatus of the present invention.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Fig. 1 shows the structured flowchart of the first embodiment of intelligent power sampling apparatus of the present invention.
In the present embodiment, a kind of intelligent power sampling apparatus, comprising: Current Mutual Inductance module 10, for three-phase current being converted to milliampere to a level electric current, and press by stream that to change milliampere level current conversion be the first low voltage signal; Electric weight sampling module 20, for gathering the first low voltage signal (0.353V left and right).Current Mutual Inductance module 10 in the present embodiment, adopts low current output mutual inductor, and output current is a milliampere level, and utilizes the resistance short circuit realization stream in 6-8 Europe to press conversion.
The present embodiment is converted to low voltage signal by Current Mutual Inductance module 10 by three-phase current, delivery sampling module 20 is sampled, improve the security of electric weight sampling, solve the current transformer of available technology adopting High-current output, access instrument by secondary connection and carry out electric weight sampling, Current Transformer Secondary side open circuit, produces high pressure and causes accident, has the problem of larger potential safety hazard.These Current Mutual Inductance module 10 volumes are small and exquisite, easy for installation simultaneously.
Shown in ginseng Fig. 2, Fig. 2 shows the structured flowchart of the second embodiment of intelligent power sampling apparatus of the present invention.
In the present embodiment, for three-phase voltage is sampled, this intelligent power sampling apparatus can also arrange: voltage transformation module 11, for three-phase voltage (220V) being converted to the second low voltage signal (0.353V left and right), delivery sampling module 20 gathers.
In the present embodiment, in order to obtain the information about power of three-phase current and three-phase voltage, this intelligent power sampling apparatus can also arrange: electric weight acquisition module 30, be used for according to the first low voltage signal and the second low voltage signal that gather, obtain the information about power of three-phase current and three-phase voltage, and information about power is stored.This electric weight acquisition module 30, adopts ARM CortexM3 chip, by SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) synchronous serial signal-obtaining quantity of electricity information, and by quantity of electricity information processing storage.
In the present embodiment, this intelligent power sampling apparatus also comprises: switching value modular converter 12, for the switching value signal of input is isolated and is converted to TTL (transistor transistor logic by photoelectricity, transistor-transistor logic integrated circuit) (output high level is greater than 2.4V to level, output low level is less than 0.4V) signal, delivery acquisition module 30 obtains the also information of storage switch amount.
In the present embodiment, this intelligent power sampling apparatus also comprises: communication module 40, communication module 40 is electrically connected with electric weight acquisition module 30 by TTL serial ports, for by digital protocol (Rs485) by the communication of information about power and switching value to terminal.
In the present embodiment, digital protocol includes but not limited to: Rs485, Can, Lan, Rs232 and Rs422.
In the present embodiment, for this electric weight sampling module 20 is carried out to parameter setting (being mainly used in Default Value), this intelligent power sampling apparatus also can arrange USB module.
The operational process of intelligent power sampling apparatus of the present invention is as follows:
Read power down parameter, mainly read code and actual value calculating parameter and the electric degree parameter etc. of quantity of electricity, if start for the first time, equipment will write initiation parameter.
Initialization serial ports, the main information such as baud rate and form that serial ports is set according to parameter.
Initialization USB mouth, is initialized as USB HID form by USB mouth, and computer will can be calibrated this acquisition module without driving, and this function is mainly used in Default Value.
Initialization house dog, mainly opens house dog, restarts mechanism for ensureing that each process equipment crashes.
Initialization quantity of electricity chip, mainly presses parameter read-in quantity of electricity chip, to ensure that the data that read are as free from error collection value.
Read toggle switch address, utilize GPIO to read this module's address, communicate by letter for Modbus.
Read remote signalling, utilize GPIO read switch amount signal, the monitoring for equipment to switch.
Read quantity of electricity, quantity of electricity chip is read in circulation, reads in real time its collection value.
USB parameter arranges, and mainly utilizes USB to arrange acquisition module parameter.
Modbus protocol processes, is arranged in Interruption, Interruption 1ms once, for the treatment of Modbus agreement request and electric degree data integrating.
The present invention adopts front end digital form, directly information about power is sampled, obtained to three-phase current, three-phase voltage and switching value in inside modules, and utilize the RS485 communication change with powerful isolating power to send, reduce the generation that analog transmission is disturbed and stopped accident completely.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. an intelligent power sampling apparatus, is characterized in that, comprising:
Current Mutual Inductance module, for three-phase current being converted to milliampere to a level electric current, and presses by stream that to change a described milliampere grade current conversion be the first low voltage signal;
Electric weight sampling module, for gathering described the first low voltage signal.
2. intelligent power sampling apparatus according to claim 1, is characterized in that, also comprises:
Voltage transformation module, for three-phase voltage being converted to the second low voltage signal, gathers for described electric weight sampling module.
3. intelligent power sampling apparatus according to claim 1 and 2, is characterized in that, also comprises:
Electric weight acquisition module, for according to described the first low voltage signal and described the second low voltage signal that gather, obtains the information about power of described three-phase current and described three-phase voltage, and described information about power is stored.
4. intelligent power sampling apparatus according to claim 3, is characterized in that, also comprises:
Switching value modular converter, for the switching value signal of input is isolated and is converted to Transistor-Transistor Logic level signal by photoelectricity, obtains and stores the information of described switching value for described electric weight acquisition module.
5. intelligent power sampling apparatus according to claim 4, is characterized in that, also comprises:
Communication module, is used for by digital protocol the communication of described information about power and described switching value to terminal.
6. intelligent power sampling apparatus according to claim 5, is characterized in that, described digital protocol includes but not limited to: Rs485, Can, Lan, Rs232 and Rs422.
7. intelligent power sampling apparatus according to claim 6, is characterized in that, described electric weight sampling module is electrically connected with described electric weight acquisition module by SPI interface; Described electric weight acquisition module is electrically connected with described communication module by TTL serial ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410373348.5A CN104122825A (en) | 2014-07-28 | 2014-07-28 | Intelligent electric quantity sampling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410373348.5A CN104122825A (en) | 2014-07-28 | 2014-07-28 | Intelligent electric quantity sampling device |
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| CN104122825A true CN104122825A (en) | 2014-10-29 |
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| CN201410373348.5A Pending CN104122825A (en) | 2014-07-28 | 2014-07-28 | Intelligent electric quantity sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107402324A (en) * | 2017-09-08 | 2017-11-28 | 威胜电气有限公司 | Power supply sample circuit, method and its low-voltage circuit breaker based on single electric current transformer |
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| EP1460438A1 (en) * | 2003-03-15 | 2004-09-22 | EMH Elektrizitätszähler GmbH & Co KG | Modular electricity meter |
| KR100824515B1 (en) * | 2006-12-27 | 2008-04-22 | 주식회사 효성 | Apparatus and method for computing digital electricpower system |
| CN101359006A (en) * | 2008-09-28 | 2009-02-04 | 天津市腾马电表有限公司 | Intelligent power utilization monitoring device |
| CN201359617Y (en) * | 2007-06-11 | 2009-12-09 | 郑五星 | Measurement malfunction monitoring wireless remote data-transmission alarming electric energy meter |
| CN201910669U (en) * | 2010-12-22 | 2011-07-27 | 广东电网公司电力科学研究院 | Power distribution automation terminal |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1460438A1 (en) * | 2003-03-15 | 2004-09-22 | EMH Elektrizitätszähler GmbH & Co KG | Modular electricity meter |
| KR100824515B1 (en) * | 2006-12-27 | 2008-04-22 | 주식회사 효성 | Apparatus and method for computing digital electricpower system |
| CN201359617Y (en) * | 2007-06-11 | 2009-12-09 | 郑五星 | Measurement malfunction monitoring wireless remote data-transmission alarming electric energy meter |
| CN101359006A (en) * | 2008-09-28 | 2009-02-04 | 天津市腾马电表有限公司 | Intelligent power utilization monitoring device |
| CN201910669U (en) * | 2010-12-22 | 2011-07-27 | 广东电网公司电力科学研究院 | Power distribution automation terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107402324A (en) * | 2017-09-08 | 2017-11-28 | 威胜电气有限公司 | Power supply sample circuit, method and its low-voltage circuit breaker based on single electric current transformer |
| CN107402324B (en) * | 2017-09-08 | 2023-08-15 | 威胜能源技术股份有限公司 | Power supply sampling circuit and method based on single current transformer and low-voltage circuit breaker thereof |
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