CN103091546A - Voltage extracting device - Google Patents
Voltage extracting device Download PDFInfo
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- CN103091546A CN103091546A CN2013100112483A CN201310011248A CN103091546A CN 103091546 A CN103091546 A CN 103091546A CN 2013100112483 A CN2013100112483 A CN 2013100112483A CN 201310011248 A CN201310011248 A CN 201310011248A CN 103091546 A CN103091546 A CN 103091546A
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Abstract
The invention relates to a voltage extracting device. Inductive components of a voltage transformer are compensated by capacitance. A resistor element for a primary side of the voltage extracting device is used as an adjusting element of secondary output voltage; a secondary side of the voltage extracting device is connected with a voltage transformer of a load, and the primary side is connected with an end screen of a current transformer; after being in series connection with a shunting resistor, an adjustable resistor is respectively in parallel connection with a shunting resistor and a capacitor; and two ends of the capacitor are further in parallel connection with a voltage stabilization element. The voltage extracting device has the advantages that because end screen current is accessed to the current transformer to extract voltage, the input and output voltage of the voltage transformer are changed by adjusting the shunting resistor, and the output voltage leads phase voltage of an extracted phase by 90 degrees. The voltage of a primary circuit and a secondary circuit of the voltage extracting device are low, operations of equipment are safe and reliable, and service life of elements is greatly prolonged.
Description
Technical field
The present invention relates to the device of a kind of 66KV of being applied to relay protection of power system and security of system, relate in particular to a kind of capacitor-voltage detecting device.
Background technology
At present; voltage extracting is that detection line has no-voltage and the same period in relay protection system; the voltage extracting technology is only applicable to 220kV, 110kV solidly grounded system; draw-out device needs the end shield electric current larger; power consumption is higher; load capacity is limited, and capacitor-voltage detecting device relies on electric parameters transducer access end shield electric current induction output voltage, adjusts phase angle by capacitor.66kV is isolated neutral system, and the end shield electric current is less, and existing capacitor-voltage detecting device is extraction system voltage correctly.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this invention is to provide a kind of capacitor-voltage detecting device, can extract the 66kV system voltage, overvoltage protection is quick and precisely reliable, and the short form test wiring is increased work efficiency.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of capacitor-voltage detecting device is characterized in that, the inductive component capacitance compensation of voltage transformer uses resistive element as the regulating element of secondary output voltage at the primary side of capacitor-voltage detecting device; The secondary side of capacitor-voltage detecting device is connected with the voltage transformer of load, and primary side connects the current transformer end shield, adjustable resistance with after divider resistance is connected respectively with shunt resistance, Capacitance parallel connection, electric capacity two ends also are parallel with voltage stabilizing element.
Described voltage stabilizing element adopts the 1.5kE150CA diode.
Described voltage transformer adopts boosting mode, needs the end shield electric current less than 4mA.
Adjustable resistance comes regulation voltage transformer primary voltage, the electrodeless adjusting of capacitor-voltage detecting device output voltage with after divider resistance is connected by shunting end shield electric current.
Compared with prior art, the invention has the beneficial effects as follows:
By the end shield current draw system voltage of access current transformer, change the input and output voltage of voltage transformer by regulating shunt resistance, output voltage is ahead of and extracts 90 ° of phase phase voltages.The primary circuit voltage stabilizing element adopts the fast transient diode element as overvoltage protection element, the Overvoltage suppressing fast and reliable; Capacitor-voltage detecting device once, secondary circuit voltage is low, more safe and reliable to the operation of equipment, greatly lengthen the serviceable life of element; Adopt slide potentiometer to carry out the voltage adjustment, can realize the step-less adjustment of output voltage; The electronic component that adopts is fewer, and the voltage transformer volume is also little a lot, and the draw-out device volume is little, and is lightweight.
Description of drawings
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is described in detail, but should be noted that enforcement of the present invention is not limited to following embodiment.
See Fig. 1, a kind of capacitor-voltage detecting device, the inductive component capacitance compensation of voltage transformer N uses resistive element as the regulating element of secondary output voltage at the primary side of capacitor-voltage detecting device; The secondary side of capacitor-voltage detecting device is connected with the voltage transformer of load, and primary side connects the current transformer end shield, and adjustable resistance R1 is with in parallel with shunt resistance R3, capacitor C respectively after divider resistance R2 connects, and capacitor C two ends also are parallel with voltage stabilizing element TVS.
Described voltage stabilizing element TVS adopts the 1.5kE150CA diode.
Described voltage transformer N adopts boosting mode, needs the end shield electric current less than 4mA.
Adjustable resistance R1 comes regulation voltage transformer N primary voltage, the electrodeless adjusting of capacitor-voltage detecting device output voltage with after divider resistance R2 connects by shunting end shield electric current.
Embodiment:
Capacitor-voltage detecting device is for being applied to 66kV relay protection of power system and security of system aut.eq., and shell upper connects the last electric screen terminal of current transformer, needs the current transformer end shield electric current of use little, can be applicable to 66kV; Fine tuning resistance R 1 is composed in series regulating circuit with roughly adjusted rheostat R2 can realize the output voltage step-less adjustment; Overvoltage protection adopts fast transient voltage stabilizing element 1TVS, 2TVS, and namely the 1.5kE150CA diode, move quick and precisely reliable; Capacitor C plays the effect of steady impedance; Capacitor-voltage detecting device adopts boosting mode, and operating voltage is low, and the handling safety reliability is high; Whole device power consumption is little, more more saves installing space, has reduced construction costs, and practical value is very high.
The resistance value of voltage transformer N is very large, because voltage transformer N part rated voltage is different with manufacturer, the resistance value of voltage transformer at 100K between 400K.The impedance of voltage transformer is mainly inductive component, and resistive component is very little, and angle of impedance is in close proximity to pure inductance 89.5 ° of left and right.Voltage transformer N consumed power is less than 0.1W.The capacitor-voltage detecting device rated primary voltage is defined as 50V(28.87V), rated secondary voltage 100V (57.735V), output voltage are ahead of and extract 90 ° of phase phase voltages.This is with regard to require should be close to pure resistance for the impedance operator that extracts capacitor-voltage detecting device with regard to the electric current of source, should take following measure for this reason: the inductive component capacitance compensation of voltage transformer, use resistive element as the regulating element of secondary output voltage at the primary side of capacitor-voltage detecting device.See Fig. 1, fine tuning resistance (adjustable resistance) R1 and roughly adjusted rheostat (divider resistance) R2 are composed in series the regulating resistor loop.Select WXD3-13-2W series ten circle potentiometers in order to improve degree of regulation fine tuning resistance R 1, roughly adjusted rheostat R2 selects WX112 series 5W potentiometer.Shunt resistance R3 uses greater than to a certain degree the time just now extracting the source electric current.
The present invention changes the input and output voltage of voltage transformer by the end shield current draw system voltage of access current transformer by regulating shunt resistance, output voltage is ahead of and extracts 90 ° of phase phase voltages.The primary circuit voltage stabilizing element adopts the fast transient diode element as overvoltage protection element, the Overvoltage suppressing fast and reliable; Capacitor-voltage detecting device once, secondary circuit voltage is low, more safe and reliable to the operation of equipment, greatly lengthen the serviceable life of element; Adopt slide potentiometer to carry out the voltage adjustment, can realize the step-less adjustment of output voltage; The electronic component that adopts is fewer, and the voltage transformer volume is also little a lot, and the draw-out device volume is little, and is lightweight.
Claims (4)
1. a capacitor-voltage detecting device, is characterized in that, the inductive component capacitance compensation of voltage transformer uses resistive element as the regulating element of secondary output voltage at the primary side of capacitor-voltage detecting device; The secondary side of capacitor-voltage detecting device is connected with the voltage transformer of load, and primary side connects the current transformer end shield, adjustable resistance with after divider resistance is connected respectively with shunt resistance, Capacitance parallel connection, electric capacity two ends also are parallel with voltage stabilizing element.
2. a kind of capacitor-voltage detecting device according to claim 1, is characterized in that, described voltage stabilizing element adopts the 1.5kE150CA diode.
3. a kind of capacitor-voltage detecting device according to claim 1, is characterized in that, described voltage transformer adopts boosting mode, needs the end shield electric current less than 4mA.
4. a kind of capacitor-voltage detecting device according to claim 1, is characterized in that, adjustable resistance comes regulation voltage transformer primary voltage, the electrodeless adjusting of capacitor-voltage detecting device output voltage with after divider resistance is connected by shunting end shield electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100112483A CN103091546A (en) | 2013-01-12 | 2013-01-12 | Voltage extracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100112483A CN103091546A (en) | 2013-01-12 | 2013-01-12 | Voltage extracting device |
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| CN103091546A true CN103091546A (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100112483A Pending CN103091546A (en) | 2013-01-12 | 2013-01-12 | Voltage extracting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332198A (en) * | 2017-08-02 | 2017-11-07 | 国网天津市电力公司 | A kind of 110kV capacitor-voltage detecting devices |
| CN109581035A (en) * | 2017-09-29 | 2019-04-05 | 施耐德电器工业公司 | It is used to indicate the system in high voltage network there are voltage |
Citations (6)
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|---|---|---|---|---|
| CN2238499Y (en) * | 1995-03-20 | 1996-10-23 | 北京市四博连通用机械新技术公司 | Current and voltage changer for mobile converting station |
| CN2627515Y (en) * | 2003-06-13 | 2004-07-21 | 鞍山华瑞继保电气有限公司 | Voltage extracting device |
| CN2713480Y (en) * | 2004-08-06 | 2005-07-27 | 马鞍山市万缘电气有限责任公司 | Signal sampling apparatus for insulated charged detection of electric power capacitive device |
| CN101188355A (en) * | 2007-11-29 | 2008-05-28 | 北京四方继保工程技术有限公司 | Method for converting the end electric screen current of mutual inductor into line voltage and insulation line monitoring device |
| CN102110973A (en) * | 2009-12-28 | 2011-06-29 | 盛炳君 | Relay protection safety automatic technology of power system |
| CN203054068U (en) * | 2013-01-12 | 2013-07-10 | 辽宁省电力有限公司鞍山供电公司 | Voltage extracting apparatus |
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2013
- 2013-01-12 CN CN2013100112483A patent/CN103091546A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| CN2238499Y (en) * | 1995-03-20 | 1996-10-23 | 北京市四博连通用机械新技术公司 | Current and voltage changer for mobile converting station |
| CN2627515Y (en) * | 2003-06-13 | 2004-07-21 | 鞍山华瑞继保电气有限公司 | Voltage extracting device |
| CN2713480Y (en) * | 2004-08-06 | 2005-07-27 | 马鞍山市万缘电气有限责任公司 | Signal sampling apparatus for insulated charged detection of electric power capacitive device |
| CN101188355A (en) * | 2007-11-29 | 2008-05-28 | 北京四方继保工程技术有限公司 | Method for converting the end electric screen current of mutual inductor into line voltage and insulation line monitoring device |
| CN102110973A (en) * | 2009-12-28 | 2011-06-29 | 盛炳君 | Relay protection safety automatic technology of power system |
| CN203054068U (en) * | 2013-01-12 | 2013-07-10 | 辽宁省电力有限公司鞍山供电公司 | Voltage extracting apparatus |
Non-Patent Citations (2)
| Title |
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| 杨喜元: "ZY-4B型电压抽取装置输出电压相位的模拟调试方法", 《继电器》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332198A (en) * | 2017-08-02 | 2017-11-07 | 国网天津市电力公司 | A kind of 110kV capacitor-voltage detecting devices |
| CN109581035A (en) * | 2017-09-29 | 2019-04-05 | 施耐德电器工业公司 | It is used to indicate the system in high voltage network there are voltage |
| CN109581035B (en) * | 2017-09-29 | 2022-07-22 | 施耐德电器工业公司 | System for indicating the presence of a voltage in a high voltage network |
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Application publication date: 20130508 |