CN101446602B - Voltage change ratio detector - Google Patents
Voltage change ratio detector Download PDFInfo
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- CN101446602B CN101446602B CN2007101711782A CN200710171178A CN101446602B CN 101446602 B CN101446602 B CN 101446602B CN 2007101711782 A CN2007101711782 A CN 2007101711782A CN 200710171178 A CN200710171178 A CN 200710171178A CN 101446602 B CN101446602 B CN 101446602B
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Abstract
The invention relates to a voltage change ratio detector which comprises an input port, a voltage converter unit, a signal processing output unit and an output port. The input port, the voltage converter unit and the signal processing output unit are mutually connected with the output port. Three-phase voltage in industrial electrical network is input into the voltage switching unit by the input port. The voltage converter unit switches the voltage into low voltage signals which can be processed by the signal processing output unit in proportion. After the processing calculation is carried out on the signals by the signal processing output unit, the signals of the voltage change ratio are output by the output port. Compared with the prior art, the voltage change ratio detector has the advantage of detecting voltage changes accurately and reliably.
Description
Technical field
The present invention relates to voltage detecting, particularly relate to a kind of voltage change ratio detector.
Background technology
Voltage parameter is an important evidence of implementing control automatically and protection consumer in the industrial electrical network.For example output voltage declines to a great extent and means overload power-supply unit (transformer, generator etc.), and even the generation of short circuit.In addition, if three-phase imbalance loads on the neutral line when opening circuit, the result that certain phase voltage raises and damages consumer will appear.Therefore, it is most important to detect the ANOMALOUS VARIATIONS of voltage in advance.Detecting change in voltage is that voltage change ratio (du/dt) detects.So far, the special high-accuracy voltage rate of change detection means of Shang Weiyou.
Summary of the invention
Technical matters to be solved by this invention be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of reliably, voltage change ratio detector accurately.
Purpose of the present invention can be achieved through the following technical solutions: voltage change ratio detector, it is characterized in that, comprise input port, voltage transformation module, signal Processing output unit, output port, described input port, voltage transformation module, signal Processing output unit and output port interconnect; Three-phase voltage is given voltage transformation module through input port in the industrial electrical network, voltage transformation module is transformed into voltage scale can be for the low voltage signal of signal Processing output unit processing, after by the signal Processing output unit signal being handled computing, the voltage change ratio signal is exported through output port.
Described input port comprises three-phase voltage input end AIN, BIN, CIN and zero line side N;
Described voltage transformation module comprises voltage protection device YA, YB, YC and voltage changer T, and described voltage changer T comprises the magnetic core of ring-type, is wound with three groups of coils on this magnetic core, and every group of coil is made of primary winding and secondary coil respectively;
Described signal Processing output unit comprises that 16 digital signal controller, electrify restoration circuit, master oscillator frequenc provide circuit, duty indicating circuit; Described electrify restoration circuit, master oscillator frequenc provide circuit all to be connected with digital signal controller with the duty indicating circuit;
Described output port comprises aanalogvoltage output port ADO, BDO, CDO, digital signal serial output terminal mouth SDI, the SDO of three-phase voltage rate of change, and PORT COM TX, RX.
Described three-phase voltage input end AIN is connected with the end of voltage protection device YA and the end of primary winding TA1, the other end of the other end of voltage protection device YA and primary winding TA1 all is connected with zero line side N, end with the TA2 of coil groups is connected its other end ground connection with the pin 2 of digital signal controller; Described three-phase voltage input end BIN is connected with the end of voltage protection device YB and the end of primary winding TB1, the other end of the other end of voltage protection device YB and primary winding TB 1 all is connected with zero line side N, end with the TB2 of coil groups is connected its other end ground connection with pin 3 ends of digital signal controller; Three-phase voltage input end CIN is connected with the end of voltage protection device YC and the end of primary winding TC1; the other end of the other end of voltage protection device YC and primary winding TC1 all is connected with zero line side N; end with the TC2 of coil groups is connected its other end ground connection with pin 4 ends of digital signal controller.
The pin 5 of described digital signal controller and pin 24 equal ground connection, pin 17, pin 25 is connected with+5V voltage end, pin 16 is connected with-5V voltage end, pin 23 successively with resistance R 3, R4 series connection back is connected with aanalogvoltage output port ADO, resistance R 4 two ends are connected with capacitor C 4 respectively, C5, capacitor C 4, C5 all is connected with-5V voltage end, pin 21 successively with resistance R 5, R6 series connection back is connected with aanalogvoltage output port BDO, resistance R 6 two ends are connected with capacitor C 6 respectively, C7, capacitor C 6, C7 all is connected with-5V voltage end, pin 19 successively with resistance R 7, R8 series connection back is connected with aanalogvoltage output port CDO, resistance R 8 two ends are connected with capacitor C 8 respectively, C9, capacitor C 8, C9 all is connected with-5V voltage end, pin 14,15 respectively with port SDI, SDO connects, pin 8,9 respectively with PORT COM TX, RX connects.
Described electrify restoration circuit comprises capacitor C 1, resistance R 1, and an end of capacitor C 1 and resistance R 1 all is connected with the 5V voltage source, the other end ground connection of capacitor C 1, and the other end of resistance R 1 is connected with the pin of digital signal controller 26.
Described master oscillator frequenc provides circuit to comprise capacitor C 2, C3, crystal oscillator XT, the equal ground connection of an end of capacitor C 2, C3, and its other end connects respectively at the pin 6,7 of digital signal controller, is connected with crystal oscillator XT between this pin 6,7.
Described duty indicating circuit comprises resistance R 2, LED light, and an end of resistance R 2 is connected with the pin 11 of digital signal controller, and its other end is connected back ground connection with LED light.
Described voltage protection device adopts voltage dependent resistor (VDR).
Described magnetic core adopts the ultracrystallite material, and adopts epoxy encapsulation.
Compared with prior art, the present invention have accurately, the advantage of reliable detection change in voltage.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, voltage change ratio detector comprises input port, voltage transformation module, signal Processing output unit, output port, and described input port, voltage transformation module, signal Processing output unit and output port interconnect; Three-phase voltage is given voltage transformation module through input port in the industrial electrical network, voltage transformation module is transformed into voltage scale can be for the low voltage signal of signal Processing output unit processing, after by the signal Processing output unit signal being handled computing, the voltage change ratio signal is exported through output port.
Described input port comprises three-phase voltage input end AIN, BIN, CIN and zero line side N; Described voltage transformation module comprises voltage protection device YA, YB, YC and voltage changer T, and described voltage changer T comprises the magnetic core of ring-type, is wound with three groups of coils on this magnetic core, and every group of coil is made of primary winding and secondary coil respectively; Described signal Processing output unit comprises that 16 digital signal controller, electrify restoration circuit, master oscillator frequenc provide circuit, duty indicating circuit; Described electrify restoration circuit, master oscillator frequenc provide circuit all to be connected with digital signal controller with the duty indicating circuit; Described output port comprises aanalogvoltage output port ADO, BDO, CDO, digital signal serial output terminal mouth SDI, the SDO of three-phase voltage rate of change, and PORT COM TX, RX; Described three-phase voltage input end AIN is connected with the end of voltage protection device YA and the end of primary winding TA1, the other end of the other end of voltage protection device YA and primary winding TA1 all is connected with zero line side N, end with the TA2 of coil groups is connected its other end ground connection with the pin 2 of digital signal controller; Described three-phase voltage input end BIN is connected with the end of voltage protection device YB and the end of primary winding TB1, the other end of the other end of voltage protection device YB and primary winding TB1 all is connected with zero line side N, end with the TB2 of coil groups is connected its other end ground connection with pin 3 ends of digital signal controller; Three-phase voltage input end CIN is connected with the end of voltage protection device YC and the end of primary winding TC1, the other end of the other end of voltage protection device YC and primary winding TC1 all is connected with zero line side N, end with the TC2 of coil groups is connected its other end ground connection with pin 4 ends of digital signal controller; The pin 5 of described digital signal controller and pin 24 equal ground connection, pin 17, pin 25 is connected with+5V voltage end, pin 16 is connected with-5V voltage end, pin 23 successively with resistance R 3, R4 series connection back is connected with aanalogvoltage output port ADO, resistance R 4 two ends are connected with capacitor C 4 respectively, C5, capacitor C 4, C5 all is connected with-5V voltage end, pin 21 successively with resistance R 5, R6 series connection back is connected with aanalogvoltage output port BDO, resistance R 6 two ends are connected with capacitor C 6 respectively, C7, capacitor C 6, C7 all is connected with-5V voltage end, pin 19 successively with resistance R 7, R8 series connection back is connected with aanalogvoltage output port CDO, resistance R 8 two ends are connected with capacitor C 8 respectively, C9, capacitor C 8, C9 all is connected with-5V voltage end, pin 14,15 respectively with port SDI, SDO connects, pin 8,9 respectively with PORT COM TX, RX connects; Described electrify restoration circuit comprises capacitor C 1, resistance R 1, and an end of capacitor C 1 and resistance R 1 all is connected with the 5V voltage source, the other end ground connection of capacitor C 1, and the other end of resistance R 1 is connected with the pin of digital signal controller 26; Described master oscillator frequenc provides circuit to comprise capacitor C 2, C3, crystal oscillator XT, the equal ground connection of an end of capacitor C 2, C3, and its other end connects respectively at the pin 6,7 of digital signal controller, is connected with crystal oscillator XT between this pin 6,7; Described duty indicating circuit comprises resistance R 2, LED light, and an end of resistance R 2 is connected with the pin 11 of digital signal controller, and its other end is connected back ground connection with LED light; Described voltage protection device adopts voltage dependent resistor (VDR); Described magnetic core adopts the ultracrystallite material, and adopts epoxy encapsulation.
Wherein:
1. voltage transformation part is by YA, YB, and YC and T form.YA, YB, YC is a voltage protection device, protects this module not to be subjected to the damage of ultra-voltage.T is the transducer that specialized designs is made, and three-phase voltage scaling transformation in the industrial electrical network is become can be for the low voltage signal of chip processing.
The magnetic core of transducer T adopts the ultracrystallite material to make.Ultracrystallite material transducer has unique superiority:
A) low-down iron loss, very high saturation magnetic flux density, sufficiently high magnetic permeability.
B) working temperature height, in-40 ℃～+ 120 ℃ scopes, characteristic does not vary with temperature.
C) magnetic core has higher physical strength by epoxy encapsulation.
The coil parameter of transducer T is through optimal design.Primary winding has the good insulation performance performance, best current density, the less volume that takies; Primary winding and secondary coil have good coupling.
Guaranteed like this variation of ambient temperature and voltage significantly, when sharply changing output signal undistorted, do not have and lag behind.
2. signal operation, processing and output, by IC, C1～C9, R1～R8, XT and LED form.Wherein IC is 16 position digital signal controllers (DSC), and the simulating signal of input is carried out the A/D conversion, rate of change du/dt computing and conversion output.Its way of output has three kinds:
A) by SDI, SDO mouth other device is exported in the digital signal serial of rate of change du/dt.
B) carry out communication by TX, RX mouth and miscellaneous equipment.
C) through D/A conversion output analog voltage signal.
IC has 12 A/D transfer capabilities, and its resolution is 1/4096; Minimum 50ns operation time, 16 bit digital processing poweies, the high-order digit wave filter has guaranteed sufficiently high precision.IC has abundant EEPROM, even have a power failure, data still can be preserved.
Wherein the discrete values differential based on Taylor series is adopted in rate of change du/dt computing.
Capacitor C 1, resistance R 1 are electrify restoration circuit, and capacitor C 2, C3 and crystal oscillator XT supply with the IC master oscillator frequenc.
Resistance R 2 and LED indicating operating status.
High-accuracy voltage rate of change detection module is packaged into an integral device, and pin is a standard 2.54mm pin distance, so that use.
Claims (7)
1. voltage change ratio detector is characterized in that, comprises input port, voltage transformation module, signal Processing output unit, output port, and described input port, voltage transformation module, signal Processing output unit are connected successively with output port; Three-phase voltage is given voltage transformation module through input port in the industrial electrical network, voltage transformation module is transformed into voltage scale can be for the low voltage signal of signal Processing output unit processing, after by the signal Processing output unit signal being handled computing, the voltage change ratio signal is exported through output port;
Described input port comprises three-phase voltage input end AIN, BIN, CIN and zero line side N;
Described voltage transformation module comprises voltage protection device YA, YB, YC and voltage changer T, and described voltage changer T comprises the magnetic core of ring-type, is wound with three groups of coils on this magnetic core, and every group of coil is made of primary winding and secondary coil respectively;
Described signal Processing output unit comprises that 16 digital signal controller, electrify restoration circuit, master oscillator frequenc provide circuit, duty indicating circuit; Described electrify restoration circuit, master oscillator frequenc provide circuit all to be connected with digital signal controller with the duty indicating circuit;
Described output port comprises aanalogvoltage output port ADO, BDO, CDO, digital signal serial output terminal mouth SDI, the SDO of three-phase voltage rate of change, and PORT COM TX, RX.
2. voltage change ratio detector according to claim 1, it is characterized in that, described three-phase voltage input end AIN is connected with the end of voltage protection device YA and the end of primary winding TA1, the other end of the other end of voltage protection device YA and primary winding TA1 all is connected with zero line side N, end with the secondary coil TA2 of coil groups is connected its other end ground connection with a pin of digital signal controller; Described three-phase voltage input end BIN is connected with the end of voltage protection device YB and the end of primary winding TB1, the other end of the other end of voltage protection device YB and primary winding TB1 all is connected with zero line side N, end with the secondary coil TB2 of coil groups is connected its other end ground connection with a pin of digital signal controller; Three-phase voltage input end CIN is connected with the end of voltage protection device YC and the end of primary winding TC1; the other end of the other end of voltage protection device YC and primary winding TC1 all is connected with zero line side N; end with the secondary coil TC2 of coil groups is connected its other end ground connection with a pin of digital signal controller.
3. voltage change ratio detector according to claim 1, it is characterized in that, described electrify restoration circuit comprises capacitor C 1, resistance R 1, one end of capacitor C 1 and resistance R 1 all is connected with the 5V voltage source, the other end ground connection of capacitor C 1, the other end of resistance R 1 is connected with a pin of digital signal controller.
4. voltage change ratio detector according to claim 1, it is characterized in that, described master oscillator frequenc provides circuit to comprise capacitor C 2, C3, crystal oscillator XT, the equal ground connection of an end of capacitor C 2, C3, its other end is connected with two pins of digital signal controller respectively, is connected with crystal oscillator XT between these two pins.
5. voltage change ratio detector according to claim 1, it is characterized in that, described duty indicating circuit comprises resistance R 2, LED light, and an end of resistance R 2 is connected with a pin of digital signal controller, and its other end is connected back ground connection with LED light.
6. voltage change ratio detector according to claim 2 is characterized in that, described voltage protection device adopts voltage dependent resistor (VDR).
7. voltage change ratio detector according to claim 1 is characterized in that, described magnetic core adopts the ultracrystallite material, and adopts epoxy encapsulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101711782A CN101446602B (en) | 2007-11-28 | 2007-11-28 | Voltage change ratio detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101711782A CN101446602B (en) | 2007-11-28 | 2007-11-28 | Voltage change ratio detector |
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| CN101446602A CN101446602A (en) | 2009-06-03 |
| CN101446602B true CN101446602B (en) | 2011-05-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338644B (en) * | 2015-11-27 | 2019-03-08 | 深圳市中兴物联科技有限公司 | Voltage change ratio detection method and device |
| CN109085411B (en) * | 2018-08-22 | 2021-06-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Circuit for detecting voltage change rate of two ends of thyristor |
| CN114740250A (en) * | 2022-04-15 | 2022-07-12 | 广东舜势测控设备有限公司 | Analog signal detection device and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215351U (en) * | 1987-11-06 | 1988-10-26 | 上海航空电器厂 | Electricity leakage protector with a piezoresistor type overvoltage protective device |
| CN201130209Y (en) * | 2007-11-28 | 2008-10-08 | 上海精益电器厂有限公司 | Apparatus for detecting voltage change |
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2007
- 2007-11-28 CN CN2007101711782A patent/CN101446602B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215351U (en) * | 1987-11-06 | 1988-10-26 | 上海航空电器厂 | Electricity leakage protector with a piezoresistor type overvoltage protective device |
| CN201130209Y (en) * | 2007-11-28 | 2008-10-08 | 上海精益电器厂有限公司 | Apparatus for detecting voltage change |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2005-57905A 2005.03.03 |
| 李新华等.变压器电压变化率的极值分析.《湖北工学院学报》.2001,第16卷(第2期),6-8. * |
| 蒋光祖.变压器短路阻抗及电压调整率计算.《变压器》.2007,第44卷(第5期),6-8. * |
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