CN101221199A - Equipotential high-tension electric energy measuring apparatus of authigenic power supply - Google Patents
Equipotential high-tension electric energy measuring apparatus of authigenic power supply Download PDFInfo
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- CN101221199A CN101221199A CNA2008100140393A CN200810014039A CN101221199A CN 101221199 A CN101221199 A CN 101221199A CN A2008100140393 A CNA2008100140393 A CN A2008100140393A CN 200810014039 A CN200810014039 A CN 200810014039A CN 101221199 A CN101221199 A CN 101221199A
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Abstract
The invention discloses a device for measuring equipotential high-voltage electric energy with a self-generating power source and belongs to the technical field of electricity measurement. The device uses a cheap low-voltage AC transformer (CT) for inducing electricity current from a high-voltage wire and converts the induced electricity current to a DC stabilized voltage power source through rectification, filtration, amplitude limit and voltage regulation, the cathode of the voltage power source is connected with the high-voltage wire, thus forming a DC stabilized voltage power source with the reference potential equipotential with the high-voltage wire. The DC stabilized voltage power source can be taken as a power source of an electricity measurement or metering circuit for measuring or metering equipotential electricity, and transmitting the measuring or metering data to a ground computer system for various processing through an optical fiber or a wireless way. An insulated isolation optical fiber or a space of the measuring or metering device is independent of voltage class, and the volume, weight and production cost of the measuring or metering device which is applied in high-voltage measurement are one tenth or less than one twentieth of those of the traditional equipment, simultaneously the equipotential measurement can implement the transduction which takes the definition type of the law of ohm, thus not only saving a secondary mutual inductance and markedly improving measurement precision, but also implementing complete information measurement.
Description
Technical field
The present invention relates to a kind of equipotential high-tension electric energy measuring apparatus of authigenic power supply, belong to the power measurement technical field.
Background technology
Electric energy metrical is an important step of electric system with measuring, and traditional high-voltage electric energy measurement and measurement mechanism generally are made up of voltage transformer (VT) (PT), current transformer (CT), measurement instrument.The instrumentation precision is except having the substantial connection with the relation of the precision of current sensor and voltage sensor and accuracy closelyr with the instrumentation instrument in the metering of electric energy and measuring process, so the performance of ac sensor, quality and cost directly affect the instrumentation precision of electric system, safe and reliable and economical operation.At present traditional high-pressure gauge measurement equipment all adopts induction mutual inductor, and problem such as induction high-tension current, voltage transformer (VT) have exposed that magnetic saturation, dynamic range are little, ferroresonance, filled with oil are inflammable and explosive.Induction in addition mutual inductor is along with its cost of raising of electric pressure significantly improves, and for example the market price of the current transformer of a 380V electric pressure has only 50 yuan, but the current transformer market price of a 220KV electric pressure is 60,000 yuan.The more and more higher induction current-voltage transformer of, voltage increasing along with the power system development electric current not only its expensive cost makes us being difficult to bear but also its security and sensing accuracy are difficult to reach requirement.In order to solve the high-voltage electric energy measurement problem, the countries in the world unanimity does not stop the research and development of new electric energy metering outfit and obtains certain progress for many years, but do not obtain the breakthrough of matter so far as yet, the main flow of high pressure instrumentation is still prolonged the traditional mode that adds the instrumentation instrument with induction electric current, voltage transformer (VT).
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of reasonable in designly, easy to manufacture, easy to install, cost is low, performance good, safe and reliable equipotential high-tension electric energy measuring apparatus of authigenic power supply.
A kind of equipotential high-tension electric energy measuring apparatus of authigenic power supply, by copper-manganese plate current sensor, electric resistance partial pressure type voltage sensor, on the device for measurement of electrical energy that equipotential electric energy measuring circuit and high pressure isolated data transmit and the processing section is formed, spontaneous equipotential D.C. regulated power supply is set, formation is the equipotential electric energy measuring circuit of measuring power supply with spontaneous equipotential D.C. regulated power supply, spontaneous equipotential D.C. regulated power supply, equipotential electric energy measuring circuit and copper-manganese plate current sensor are contained in the airtight metallic shield box, shielding box and hi-line join, and form equivalent potential screen.
Described spontaneous equipotential D.C. regulated power supply is made up of electromagnetic type low-voltage current mutual inductor CT, rectifier bridge, resistance R, triode T1, voltage stabilizing diode W, regulator block 7805, capacitor C 1, C2 and C3; High-voltage power line passes electromagnetic current transducer CT; Two output terminal a-b of CT connect the input end of rectifier bridge; Rectifier bridge output negative pole end c connects this phase hi-line, and positive terminal d meets current-limiting resistance R; Another termination of current-limiting resistance R with separate the positive pole of capacitor C 1, the collector of transistor T 1, the negative pole of voltage stabilizing diode W, the input end in of regulator block 7805 and be connected together; The output terminal out of regulator block 7805 links to each other with the positive pole of electrochemical capacitor C2, capacitor C 3 and forms the 5V D.C. regulated power supply jointly.
Equipotential high-tension electric energy measuring apparatus of authigenic power supply is inducted alternating current and the alternating current that will induct carries out rectification, amplitude limit, filtering, voltage stabilizing and becomes D.C. regulated power supply with cheap low-voltage current mutual inductor from hi-line, the negative pole (or anodal) of this power supply is received formed on this phase line with reference to zero potential and the equipotential positive polarity of hi-line (or negative polarity) D.C. regulated power supply.Its reference potential of electric energy metrical of working under this power supply or metering circuit is with the hi-line equipotential, and is irrelevant with electric pressure.The data of electric energy metrical or measurement are realized high pressure isolation transmission by Laser Modulation detuner and optical fiber, formed a kind of authigenic power supply Equipotential high-tension electric energy measuring device.
Characteristics of the present invention are as follows:
1, because to have adopted equipotential to measure its cost of manufacture and electric pressure irrelevant, obvious, equipment manufacturing cost can decline to a great extent, and the high more economic benefit of electric pressure is remarkable more.For example: can reduce by tens times to its equipment manufacturing cost of 220KV electric pressure.
2, adopt isopotential electrical its witness mark current potential of energy measurement and hi-line current potential to be equal to, the common mode interference of being come by conduction is inoperative to metering circuit, and therefore device has stronger anti-electrical network Conduction Interference ability.
3, metering circuit is to be sealed in the metallic shield box, so shielding box and hi-line directly link to each other and formed the equivalent potential screen device and have stronger anti-spatial interference ability equally.
So 4, to be based on electric current, the voltage sensor of the definition type sensor device of Ohm law be perfect information sensing from the direct current to the high frequency for the electric current of Cai Yonging, voltage sensor.
5, measure need not the secondary mutual inductance for equipotential, and its measurement result does not have the influence of secondary mutual inductance error, will obviously improve so measuring accuracy is compared precision with the traditional measurement method that adopts the electromagnetism D.C mutual-inductor.
6, Zhuan Zhi volume is little, in light weight, safe and reliable, easy for installation is that tradition is incomparable.
Description of drawings
Fig. 1 is an authigenic power supply equipotential electric energy measuring apparatus schematic diagram.
Fig. 2 is the high-voltage electric-energy meter scheme of installation.
Wherein, 1., spontaneous equipotential D.C. regulated power supply, 2., be the ic for energy metering at center with the ADE7753 electric energy computation chip, 3., current sensor, 4., electric resistance partial pressure type voltage sensor, 5., the high pressure isolated data transmits and the processing section, CT, is with tapped electromagnetic current transducer, 1, the High-Voltage Insulation pipe, 2, shielding box, 3, optical fiber, 4, the Laser Modulation detuner, 5, data handling machine.
Embodiment
Embodiment:
Structure of the present invention and installation are as depicted in figs. 1 and 2.A kind of equipotential high-tension electric energy measuring apparatus of authigenic power supply, by copper-manganese plate current sensor, electric resistance partial pressure type voltage sensor, on the device for measurement of electrical energy that equipotential electric energy measuring circuit and high pressure isolated data transmit and the processing section is formed, spontaneous equipotential D.C. regulated power supply is set, formation is the equipotential electric energy measuring circuit of measuring power supply with spontaneous equipotential D.C. regulated power supply, spontaneous equipotential D.C. regulated power supply, equipotential electric energy measuring circuit and copper-manganese plate current sensor are contained in the airtight metallic shield box, shielding box and hi-line join, and form equivalent potential screen.
Described spontaneous equipotential D.C. regulated power supply is made up of electromagnetic type low-voltage current mutual inductor CT, rectifier bridge, resistance R, triode T1, voltage stabilizing diode W, regulator block 7805, capacitor C 1, C2 and C3; High-voltage power line passes electromagnetic current transducer CT; Two output terminal a-b of CT connect the input end of rectifier bridge; Rectifier bridge output negative pole end c connects this phase hi-line, and positive terminal d meets current-limiting resistance R; Another termination of current-limiting resistance R with separate the positive pole of capacitor C 1, the collector of transistor T 1, the negative pole of voltage stabilizing diode W, the input end in of regulator block 7805 and be connected together; The output terminal out of regulator block 7805 links to each other with the positive pole of electrochemical capacitor C2, capacitor C 3 and forms the 5V D.C. regulated power supply jointly.
Equipotential high-tension electric energy measuring apparatus of authigenic power supply is inducted alternating current and the alternating current that will induct carries out rectification, amplitude limit, filtering, voltage stabilizing and becomes D.C. regulated power supply with cheap low-voltage current mutual inductor from hi-line, the negative pole (or E utmost point) of this power supply is received formed on this phase line with reference to zero potential and the equipotential positive polarity of hi-line (or negative polarity) D.C. regulated power supply.Its reference potential of electric energy metrical of working under this power supply or metering circuit is with the hi-line equipotential, and is irrelevant with electric pressure.The data of electric energy metrical or measurement are realized high pressure isolation transmission by Laser Modulation detuner and optical fiber, formed a kind of authigenic power supply Equipotential high-tension electric energy measuring device.
Claims (2)
1. equipotential high-tension electric energy measuring apparatus of authigenic power supply, it is characterized in that, by copper-manganese plate current sensor, electric resistance partial pressure type voltage sensor, on the device for measurement of electrical energy that equipotential electric energy measuring circuit and high pressure isolated data transmit and the processing section is formed, spontaneous equipotential D.C. regulated power supply is set, formation is the equipotential electric energy measuring circuit of measuring power supply with spontaneous equipotential D.C. regulated power supply, spontaneous equipotential D.C. regulated power supply, equipotential electric energy measuring circuit and copper-manganese plate current sensor are contained in the airtight metallic shield box, shielding box and hi-line join, and form equivalent potential screen.
2. equipotential high-tension electric energy measuring apparatus of authigenic power supply as claimed in claim 1, it is characterized in that described spontaneous equipotential D.C. regulated power supply is made up of electromagnetic type low-voltage current mutual inductor CT, rectifier bridge, resistance R, triode T1, voltage stabilizing diode W, regulator block 7805, capacitor C 1, C2 and C3; High-voltage power line passes electromagnetic current transducer CT; Two output terminal a-b of CT connect the input end of rectifier bridge; Rectifier bridge output negative pole end c connects this phase hi-line, and positive terminal d meets current-limiting resistance R; Another termination of current-limiting resistance R with separate the positive pole of capacitor C 1, the collector of transistor T 1, the negative pole of voltage stabilizing diode W, the input end in of regulator block 7805 and be connected together; The output terminal out of regulator block 7805 links to each other with the positive pole of electrochemical capacitor C2, capacitor C 3 and forms the 5V D.C. regulated power supply jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100140393A CN101221199B (en) | 2008-01-23 | 2008-01-23 | Equipotential high-tension electric energy measuring apparatus of authigenic power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100140393A CN101221199B (en) | 2008-01-23 | 2008-01-23 | Equipotential high-tension electric energy measuring apparatus of authigenic power supply |
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| CN101221199A true CN101221199A (en) | 2008-07-16 |
| CN101221199B CN101221199B (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100140393A Expired - Fee Related CN101221199B (en) | 2008-01-23 | 2008-01-23 | Equipotential high-tension electric energy measuring apparatus of authigenic power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949972A (en) * | 2010-08-12 | 2011-01-19 | 浙江省电力公司 | Current measurement device for high-voltage converter |
| CN102072998A (en) * | 2010-11-29 | 2011-05-25 | 江苏通驰自动化系统有限公司 | Half structure type high voltage wireless data acquisition device |
| CN102967757A (en) * | 2012-11-26 | 2013-03-13 | 国家电网公司 | High-voltage electricity metering method, device and system |
| CN113804946A (en) * | 2021-09-27 | 2021-12-17 | 杨帆 | Equipotential parasitic power supply voltage and current transformer combination device and working method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86201349U (en) * | 1986-02-27 | 1987-06-10 | 上海供电局 | High-voltage equipotential self-checking acoustooptical electroscope |
| DE4121654A1 (en) * | 1991-06-29 | 1993-01-07 | Asea Brown Boveri | COMBINED CURRENT AND VOLTAGE CONVERTER FOR A METAL-ENCLOSED GAS-INSULATED HIGH-VOLTAGE SYSTEM |
| HRP930794A2 (en) * | 1993-04-07 | 1994-10-31 | Mjerni Transformatori D O O | Combined electrical and voltage transformer for high voltage |
| CN2788323Y (en) * | 2005-04-14 | 2006-06-14 | 谢东阳 | Digital type high-voltage combined mutual inductor |
| CN2836203Y (en) * | 2005-09-19 | 2006-11-08 | 王宇琼 | Combined transformer for metering |
-
2008
- 2008-01-23 CN CN2008100140393A patent/CN101221199B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949972A (en) * | 2010-08-12 | 2011-01-19 | 浙江省电力公司 | Current measurement device for high-voltage converter |
| CN102072998A (en) * | 2010-11-29 | 2011-05-25 | 江苏通驰自动化系统有限公司 | Half structure type high voltage wireless data acquisition device |
| CN102967757A (en) * | 2012-11-26 | 2013-03-13 | 国家电网公司 | High-voltage electricity metering method, device and system |
| CN113804946A (en) * | 2021-09-27 | 2021-12-17 | 杨帆 | Equipotential parasitic power supply voltage and current transformer combination device and working method thereof |
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| Publication number | Publication date |
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| CN101221199B (en) | 2010-06-16 |
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