CN103969546A - Intelligent tester for secondary polarities of four-star voltage transformers - Google Patents
Intelligent tester for secondary polarities of four-star voltage transformers Download PDFInfo
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- CN103969546A CN103969546A CN201310035876.5A CN201310035876A CN103969546A CN 103969546 A CN103969546 A CN 103969546A CN 201310035876 A CN201310035876 A CN 201310035876A CN 103969546 A CN103969546 A CN 103969546A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
Abstract
The invention provides an intelligent tester for secondary polarities of four-star voltage transformers. The intelligent tester comprises a primary-side device, a secondary-side device and a power module. The primary-side device comprises a voltage generating circuit, a controller, a signal conditioning circuit and a first wireless communication module; the voltage generating circuit, the first wireless communication module and the signal conditioning circuit are electrically connected with the controller by signals; the secondary-side device comprises a voltage acquisition and conversion circuit, an information processor, a liquid crystal display, a second wireless communication module and a keyboard; the voltage acquisition and conversion circuit, the liquid crystal display, the second wireless communication module and the keyboard are electrically connected with the information processor by signals; the first wireless communication module and the second wireless communication module are in wireless communication connection with each other. The intelligent tester has the advantages that whether secondary-side wiring of the four-star voltage transformers is correct or not and error types of secondary-side wiring of the four-star voltage transformers can be automatically judged by the aid of the intelligent tester and can be tested quickly and accurately, accordingly, the intelligent tester is convenient to operate, visual display effects can be realized, the work efficiency can be greatly improved, and potential safety hazards can be reduced.
Description
Technical field
The present invention relates to detection device for voltage mutual inductor in power supply system, be specifically related to a kind of for testing the intelligent tester of four stars shape Secondary Circuit of Potential Transformer polarity correctness.
Background technology
In the 10kV of power supply grid system, in order to eliminate the adverse effect of ferroresonance to voltage transformer (VT), three-phase four stars shape voltage transformer (VT) (being called for short three-phase four PT) is widely used, and its mode of connection in application as shown in Figure 4.Voltage transformer (VT), before putting into operation, must be tested voltage transformer secondary polarity correctness, guarantees that whole group of wiring of its secondary is correct, otherwise can cause the problems such as protective device misoperation, directly affects safety, the stable operation of electric system.For the test of Secondary Circuit of Potential Transformer polarity correctness, comparatively conventional method of testing is now: by add pre-designed sinusoidal voltage waveform at voltage transformer (VT) primary side, the each phase of the direct test voltage transformer secondary circuit of testing tool (the comprising zero phase) voltage values such as recycling universal meter, then the voltage transformer secondary magnitude of voltage recording is carried out to artificial calculation and analyze, whether judge the polarity correctness of Secondary Connections of PTs.Adopt traditional method of testing, its weak point is: the one, and higher to on-the-spot test personnel's competency profiling, need tester to there is corresponding professional knowledge to four stars shape voltage transformer (VT); The 2nd, due to voltage transformer (VT) primary side and Secondary Circuit of Potential Transformer often relatively far apart, when test, garrison the primary side personnel of exerting pressure and must echo and coordinate whole testing process with secondary circuit tester, work efficiency is lower, and has certain potential safety hazard.
Summary of the invention
The object of the invention is: overcome the deficiencies in the prior art, provide a kind of have primary side communicate by letter with secondary side equipment room automated wireless, can be by adopting three-phase voltage method of testing and single-phase voltage method of testing corroborate each other test result, test result by the four stars shape voltage transformer secondary polarity intelligent tester that liquid crystal display intuitively shows, easy to operate, test accuracy is high.
Technical scheme of the present invention is: four stars shape voltage transformer secondary polarity intelligent tester of the present invention, comprise primary side device, secondary side device and power module, and above-mentioned power module has power output end; Its design feature is: above-mentioned primary side device comprises voltage generating circuit, controller, the first wireless communication module and signal conditioning circuit; Voltage generating circuit is provided with voltage input end, voltage output end, driving signal input and power end; Controller is provided with first signal input end, secondary signal input end, signal output part and driving signal output part; The first wireless communication module is provided with signal input part, signal output part and radio communication end; Signal conditioning circuit is provided with voltage signal input end and signal output part; Secondary side device comprises voltage acquisition translation circuit, message handler, liquid crystal display, the second wireless communication module and keyboard; Voltage acquisition translation circuit is provided with voltage input end and voltage signal output end; Message handler is provided with voltage signal input end, keyboard signal input end, first signal input end, first signal output terminal and display output terminal; Liquid crystal display is provided with signal input part; The second wireless communication module is provided with signal input part, signal output part and radio communication end; Keyboard is provided with signal output part;
The first signal input end of the controller of primary side device is electrically connected with the signal output part of the first wireless communication module; The secondary signal input end of controller is electrically connected with the signal output part of signal conditioning circuit; The voltage signal input end of signal conditioning circuit is electrically connected with the voltage output end of voltage generating circuit; The signal input part of the first wireless communication module is electrically connected with the signal output part of controller; The driving signal input of voltage generating circuit is electrically connected with the driving signal output part of controller; The power end of voltage generating circuit is electrically connected with the power output end of power module; When use, the voltage input end of voltage generating circuit is electrically connected with three-phase mains; The voltage output end of voltage generating circuit is connected with the primary side power end three-phase electricity of four stars shape voltage transformer (VT);
The voltage signal input end of the message handler of secondary side device is electrically connected with the voltage signal output end of voltage acquisition translation circuit; The keyboard signal input end of message handler is electrically connected with the signal output part of keyboard; The first signal input end of message handler is electrically connected with the signal output part of the second wireless communication module; The signal input part of the second wireless communication module is electrically connected with the first signal output terminal of message handler; The signal input part of liquid crystal display is electrically connected with the display output terminal of message handler; The radio communication end of the second wireless communication module is electrically connected with the radio communication end wireless signal of the first wireless communication module of primary side device; When use, the voltage input end of voltage acquisition translation circuit is electrically connected with the secondary side power end of four stars shape voltage transformer (VT).
Further scheme is: the voltage generating circuit of above-mentioned primary side device comprises three-phase transformer, solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4, solid-state relay SSR5, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14 and resistance R 15, solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4 and solid-state relay SSR5 all have totally 4 wiring pins 1 to No. 4, three-phase transformer has 3 armature windings and 3 secondary winding, and 3 armature windings and 3 secondary winding all have positive pole and negative pole, 3 secondary winding difference of three-phase transformer is called the first secondary winding, second subprime winding and level winding for the third time, the positive pole of 3 armature windings of three-phase transformer is the voltage input end of the voltage generating circuit of above-mentioned primary side device, the negative pole of 3 armature windings connects the earth, the negative pole of 3 secondary winding of three-phase transformer is electrically connected with No. 1 wiring pin of solid-state relay SSR1, No. 2 wiring pins of solid-state relay SSR1 connect that power supply ground, No. 3 wiring pins are electrically connected with one end of resistance R 1, No. 4 wiring pins are electrically connected with the collector of triode Q1, one end of the emitter-base bandgap grading of triode Q1 and resistance R 3 connects power supply ground jointly, one end conllinear of the base stage of triode Q1, the other end of resistance R 3 and resistance R 2, No. 1 wiring pin of the positive pole of the first secondary winding of three-phase transformer and solid-state relay SSR2 and No. 1 wiring pin conllinear of solid-state relay SSR3, No. 2 wiring pins of solid-state relay SSR2 connect that power supply ground, No. 3 wiring pins are electrically connected with one end of resistance R 4, No. 4 wiring pins are electrically connected with the collector of triode Q2, one end of the emitter-base bandgap grading of triode Q2 and resistance R 6 connects power supply ground jointly, one end conllinear of the base stage of triode Q2, the other end of resistance R 6 and resistance R 5, No. 3 wiring pins of solid-state relay SSR3 are electrically connected with one end of resistance R 7, No. 4 wiring pins are electrically connected with the collector of triode Q3, one end of the emitter-base bandgap grading of triode Q3 and resistance R 9 connects power supply ground jointly, one end conllinear of the base stage of triode Q3, the other end of resistance R 9 and resistance R 8, No. 1 wiring pin of solid-state relay SSR4 is electrically connected with the positive pole of the second subprime winding of three-phase transformer, No. 3 wiring pins of solid-state relay SSR4 are electrically connected with one end of resistance R 12, No. 4 wiring pins are electrically connected with the collector of triode Q4, one end of the emitter-base bandgap grading of triode Q4 and resistance R 11 connects power supply ground jointly, one end conllinear of the base stage of triode Q4, the other end of resistance R 11 and resistance R 10, No. 1 wiring pin of solid-state relay SSR5 is electrically connected with the positive pole of the winding of level for the third time of three-phase transformer, No. 3 wiring pins of solid-state relay SSR5 are electrically connected with one end of resistance R 15, No. 4 wiring pins are electrically connected with the collector of triode Q5, one end of the emitter-base bandgap grading of triode Q5 and resistance R 14 connects power supply ground jointly, one end conllinear of the base stage of triode Q5, the other end of resistance R 14 and resistance R 13,
No. 2 wiring pins of No. 2 wiring pins of solid-state relay SSR3, No. 2 wiring pins of solid-state relay SSR4, solid-state relay SSR5 form the voltage output end of voltage generating circuit jointly; The other end, the other end of resistance R 10 and the other end of resistance R 13 of the other end of resistance R 2, the other end of resistance R 5, resistance R 8 forms the driving signal input of voltage generating circuit jointly; The other end, the other end of resistance R 12 and the other end of resistance R 15 of the other end of resistance R 1, the other end of resistance R 4, resistance R 7 forms the power end of voltage generating circuit jointly.
Further scheme is: above-mentioned solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4 and solid-state relay SSR5 is Schneider SSR-10DA type single-phase solid relay.
Further scheme also has: the message handler of above-mentioned secondary side device is the single-chip microcomputer of model TMS320F2812.
The present invention has positive effect: (1) four stars shape of the present invention voltage transformer secondary polarity intelligent tester, can be by automatic calculating and type of error when judging the secondary circuit wiring correctness of four stars shape voltage transformer (VT) and occurring wiring error, test quick and precisely, without artificial computing, increase work efficiency significantly.(2) four stars shape voltage transformer secondary polarity intelligent tester of the present invention, by being divided into the wireless communication module automated communications in primary side device and secondary side device, solve while test in prior art and need to garrison the primary side personnel that exert pressure and frequently echo with secondary circuit tester coordinate loaded down with trivial details, and reduced the even potential safety hazard of error easily causing because connecting cooperation each other.(3) four stars shape voltage transformer secondary polarity intelligent tester of the present invention, its test result shows in real time accordingly by LCDs, convenient directly perceived.
Brief description of the drawings
Fig. 1 is circuit structure block diagram of the present invention;
Fig. 2 is the electrical schematic diagram of the voltage generating circuit in the primary side device in Fig. 1;
Fig. 3 is that the present invention adopts the three-phase electricity platen press working routine process flow diagram in when test;
Fig. 4 is four stars shape voltage transformer (VT) primary side, secondary side wiring schematic diagram.
Reference numeral in above-mentioned accompanying drawing is as follows:
Primary side device 1, voltage generating circuit 11, controller 12, the first wireless communication modules 13, signal conditioning circuit 14,
Secondary side device 2, voltage acquisition translation circuit 21, message handler 22, liquid crystal display 23, the second wireless communication modules 24, keyboard 25.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
See Fig. 1, the four stars shape voltage transformer secondary polarity intelligent tester of the present embodiment, is mainly made up of primary side device 1, secondary side device 2 and power module.Power module does not draw in Fig. 1, and power module has power output end; The direct current of the power output end output+5V of power module, as system works power supply.
Primary side device 1 is mainly made up of voltage generating circuit 11, controller 12, the first wireless communication module 13 and signal conditioning circuit 14.Voltage generating circuit 11 is provided with voltage input end, voltage output end, driving signal input and power end; Controller 12 is provided with first signal input end, secondary signal input end, signal output part and driving signal output part; The first wireless communication module 13 is provided with signal input part, signal output part and radio communication end; Signal conditioning circuit 14 is provided with voltage signal input end and signal output part.
The first signal input end of controller 12 is electrically connected with the signal output part of the first wireless communication module 13; The signal input part of the first wireless communication module 13 is electrically connected with the signal output part of controller 12; The secondary signal input end of controller 12 is electrically connected with the signal output part of signal conditioning circuit 14; The voltage signal input end of signal conditioning circuit 14 is electrically connected with the voltage output end of voltage generating circuit 11; The driving signal input of voltage generating circuit 11 is electrically connected with the driving signal output part of controller 12; The power end of voltage generating circuit 11 is electrically connected with the power output end of power module; When use, the voltage input end of voltage generating circuit 11 is electrically connected with three-phase mains; The voltage output end of voltage generating circuit 11 is connected with the primary side power end three-phase electricity of four stars shape voltage transformer (VT).
Secondary side device 2 is mainly made up of voltage acquisition translation circuit 21, message handler 22, liquid crystal display 23, the second wireless communication module 24 and keyboard 25.
Voltage acquisition translation circuit 21 is provided with voltage input end and voltage signal output end; Message handler 22 is provided with voltage signal input end, keyboard signal input end, first signal input end, first signal output terminal and display output terminal; Liquid crystal display 23 is provided with signal input part; The second wireless communication module 24 is provided with signal input part, signal output part and radio communication end; Keyboard 25 is provided with signal output part.
The voltage signal input end of message handler 22 is electrically connected with the voltage signal output end of voltage acquisition translation circuit 21; The keyboard signal input end of message handler 22 is electrically connected with the signal output part of keyboard 25; The first signal input end of message handler 22 is electrically connected with the signal output part of the second wireless communication module 24; The signal input part of the second wireless communication module 24 is electrically connected with the first signal output terminal of message handler 22; The signal input part of liquid crystal display 23 is electrically connected with the display output terminal of message handler 22; When use, the voltage input end of voltage acquisition translation circuit 21 is electrically connected with the secondary side power end of four stars shape voltage transformer (VT), is also electrically connected with A phase, B phase, C phase three-phase and the residual voltage L of the secondary side power end of four stars shape voltage transformer (VT).The radio communication end of the second wireless communication module 24 is electrically connected with the radio communication end wireless signal of the first wireless communication module 13 of primary side device 1.
See Fig. 2, the voltage generating circuit 11 of primary side device 1 is made up of a three-phase transformer, solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4, solid-state relay SSR5, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14 and resistance R 15.
In solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4 and solid-state relay SSR5 the present embodiment, all preferential model is Schneider SSR-10DA type single-phase solid relay.This type relay has totally 4 wiring pins 1 to No. 4.Three-phase transformer has 3 armature windings and 3 secondary winding, and 3 armature windings and 3 secondary winding all have positive pole and negative pole; 3 secondary winding difference of three-phase transformer is called the first secondary winding, second subprime winding and level winding for the third time; The positive pole of 3 armature windings of three-phase transformer is the voltage input end of voltage generating circuit 11, when use, is that A phase voltage UA, B phase voltage UB and C phase voltage UC are electrically connected respectively with the three-phase voltage of civil power; The negative pole of 3 armature windings connects the earth; The negative pole of 3 secondary winding of three-phase transformer is electrically connected with No. 1 wiring pin of solid-state relay SSR1; No. 2 wiring pins of solid-state relay SSR1 connect power supply ground; No. 3 wiring pins of solid-state relay SSR1 are electrically connected with one end of resistance R 1; No. 4 wiring pins of solid-state relay SSR1 are electrically connected with the collector of triode Q1; One end of the emitter-base bandgap grading of triode Q1 and resistance R 3 connects power supply ground jointly; One end conllinear of the base stage of triode Q1, the other end of resistance R 3 and resistance R 2; No. 1 wiring pin of the positive pole of the first secondary winding of three-phase transformer and solid-state relay SSR2 and No. 1 wiring pin conllinear of solid-state relay SSR3; No. 2 wiring pins of solid-state relay SSR2 connect power supply ground; No. 3 wiring pins of solid-state relay SSR2 are electrically connected with one end of resistance R 4; No. 4 wiring pins of solid-state relay SSR2 are electrically connected with the collector of triode Q2; One end of the emitter-base bandgap grading of triode Q2 and resistance R 6 connects power supply ground jointly; One end conllinear of the base stage of triode Q2, the other end of resistance R 6 and resistance R 5; No. 3 wiring pins of solid-state relay SSR3 are electrically connected with one end of resistance R 7; No. 4 wiring pins of solid-state relay SSR3 are electrically connected with the collector of triode Q3; One end of the emitter-base bandgap grading of triode Q3 and resistance R 9 connects power supply ground jointly; One end conllinear of the base stage of triode Q3, the other end of resistance R 9 and resistance R 8; No. 1 wiring pin of solid-state relay SSR4 is electrically connected with the positive pole of the second subprime winding of three-phase transformer; No. 3 wiring pins of solid-state relay SSR4 are electrically connected with one end of resistance R 12; No. 4 wiring pins of solid-state relay SSR4 are electrically connected with the collector of triode Q4; One end of the emitter-base bandgap grading of triode Q4 and resistance R 11 connects power supply ground jointly; One end conllinear of the base stage of triode Q4, the other end of resistance R 11 and resistance R 10; No. 1 wiring pin of solid-state relay SSR5 is electrically connected with the positive pole of the winding of level for the third time of three-phase transformer; No. 3 wiring pins of solid-state relay SSR5 are electrically connected with one end of resistance R 15; No. 4 wiring pins of solid-state relay SSR5 are electrically connected with the collector of triode Q5; One end of the emitter-base bandgap grading of triode Q5 and resistance R 14 connects power supply ground jointly; One end conllinear of the base stage of triode Q5, the other end of resistance R 14 and resistance R 13;
No. 2 wiring pins of No. 2 wiring pins of solid-state relay SSR3, No. 2 wiring pins of solid-state relay SSR4, solid-state relay SSR5 form the voltage output end of voltage generating circuit 11 jointly, it exports respectively A phase voltage UA1, B phase voltage UB1 and C phase voltage UC1, when use, be connected with the primary side power end three-phase electricity of four stars shape mutual induction of voltage respectively.
The other end, the other end of resistance R 10 and the other end of resistance R 13 of the other end of resistance R 2, the other end of resistance R 5, resistance R 8 forms the driving signal input of voltage generating circuit 11 jointly.
The other end, the other end of resistance R 12 and the other end of resistance R 15 of the other end of resistance R 1, the other end of resistance R 4, resistance R 7 forms the power end of voltage generating circuit 11 jointly.
The voltage acquisition translation circuit 21 of secondary side device 2 comprises step-down transformer and high-accuracy voltage signal sampling resistance, and voltage acquisition translation circuit 21 is for gathering and convert four stars shape voltage transformer secondary side voltage signal.Voltage acquisition translation circuit 21 after step-down transformer carries out forceful electric power light current isolated variable, is sampled by high-accuracy voltage sampling resistor the four stars shape voltage transformer secondary side voltage of collection and the message handler 22 of exporting to secondary side device 2 is processed accordingly to voltage signal.The single-chip microcomputer that in message handler 22 the present embodiment, preferably model is TMS320F2812, this type single-chip microcomputer is by 5 common driving signal output parts as message handler 22 of I/O end of built-in program setting, the other end, the other end of resistance R 10 and the other end of the resistance R 13 corresponding electrical connection respectively of the other end of the resistance R 2 of the I/O port of these 5 settings and the common driving signal input as voltage generating circuit 11, the other end of resistance R 5, resistance R 8.
The keyboard 25 of secondary side device 2 is inputted relevant instruction for staff.Liquid crystal display 23 is as man-machine interface, the graphical demonstration of main voltage vector-diagram and the corresponding information of test result is shown, make staff can be at a glance decorrelation technique situation.
The first wireless communication module 13 of primary side device 1 carries out information interaction with controller 12, and the first wireless communication module 13 carries out radio communication by the second wireless communication module 24 of its radio communication end and secondary side device 2, by wireless way for transmitting corresponding information.
The signal conditioning circuit 14 of primary side device 1 is sampled for the voltage that voltage generating circuit 11 is exported, and after being processed, the voltage signal of sampling is transferred to controller 12, controller 12 carries out radio communication through the first wireless communication module 13 and the second wireless communication module 24 of secondary side device 2, the voltage signal collecting is sent to the message handler 22 of secondary side device 2, the phase place reference during as analysis four stars shape voltage transformer secondary side voltage signal.
Principle of work and the process of the four stars shape voltage transformer secondary polarity intelligent tester of the present embodiment are summarized as follows:
The four stars shape voltage transformer secondary polarity intelligent tester of the present embodiment in use, the voltage input end of the primary side device 1 of this tester is electrically connected with city, the voltage output end of the primary side device 1 of this tester is connected with the primary side power end three-phase electricity of four stars shape voltage transformer (VT) to be detected, the voltage input end of the voltage acquisition translation circuit 21 of the secondary side device 2 of this tester is electrically connected with the power end of the secondary side of four stars shape voltage transformer (VT); After connecting, tester sends setup test order by the keyboard 25 of secondary side device 2 to primary side device 1; Primary side device 1 enters starting state, receive and start after test command when primary side device 1, enter duty, the sinusoidal voltage amount of setting to the output of four stars shape voltage transformer (VT) primary side, the secondary side voltage signal that secondary side device 2 gathers four stars shape voltage transformer (VT) carries out analyzing and processing and carries out corresponding demonstration by LCDs 23.
The built-in program of message handler 22 of the secondary side device 2 of this tester can adopt three-phase asymmetrical voltage method and single-phase electricity platen press to test the secondary circuit polarity of four stars shape voltage transformer (VT), be further described to adopt three-phase asymmetrical voltage method test as example below, employing single-phase electricity platen press time-histories order is similar with it.
Referring to Fig. 3, after this tester powers up and brings into operation, first the controller 12 of primary side device 1 and the message handler 22 of secondary side device 2 carry out state initialization, then prepare to enter test: this tester provides " peripheral wiring is correctly no " prompting, after tester is correct by keyboard 25 manual confirmation wiring, test enters next flow process, and secondary side device 2 initiatively establishes a communications link to 1 application of primary side device; After successfully connecting, whether primary side device 1 gives its current circuit working state normal on secondary side device 2, and if not, test suspends, and reenters start program after manually; If primary side device 1 circuit working state is normal, secondary side device 2 continues next program, tester manually selects to adopt three-phase electricity platen press, secondary side device 2 adopts three-phase electricity platen press according to the manual input key order of tester, then send corresponding order to primary side device 1, primary side device 1, according to order, drives corresponding solid-state relay to complete the output of expecting voltage waveform.Secondary side device 2 gathers the voltage signal of four stars shape voltage transformer secondary side, message handler 22 by secondary side device 2 is analyzed and judges the secondary side voltage signal of the four stars shape voltage transformer (VT) gathering according to built-in program and criterion, and drives the information such as vector plot and test judgement result of liquid crystal display 23 to associated voltage signal to be shown.
While adopting three-phase asymmetrical voltage method to carry out polarity test to four stars shape voltage transformer (VT), primary side device 1 is exported three-phase asymmetrical voltage and is simulated electric system generation A phase earth fault.Now, the message handler 22 of the secondary side device 2 of this tester sends order, the driving signal output part of the controller 12 by primary side device 1 makes solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4 and solid-state relay SSR5 keep conducting state always, solid-state relay SSR1 is always in off state, the now voltage output end of the primary side device 1 of this tester output three-phase asymmetrical voltage, wherein
The method that this tester adopts three-phase electricity platen press to test the polarity correctness of four stars shape voltage transformer (VT) (aftermentioned is all referred to as PT) comprises the following steps:
1. pass through the keyboard 25 of the secondary side device 2 of this tester and manually select three-phase electricity platen press, primary side device 1 applies three-phase asymmetrical voltage at the primary side of PT, wherein
2. the secondary side device 2 of this tester is sampled to PT secondary side voltage parameter, and the parameter of sampling comprises PT secondary side residual voltage
voltage between PT secondary side a phase and zero phase
voltage between PT secondary side b phase and zero phase
voltage between PT secondary side c phase and zero phase
pT secondary side a phase voltage
pT secondary side b phase voltage
with PT secondary side c phase voltage
3. the message handler 22 of the secondary side device 2 of this tester is judged according to built-in program and criterion, the no-load voltage ratio that in following formula, K is PT, and U is the phase voltage effective value of the voltage output end output of the voltage generating circuit 11 of primary side device 1:
If
judge that PT circuit connection is correct, nonpolarity mistake;
If
judge PT secondary side A phase reverse polarity connection;
If
judge PT secondary side B phase reverse polarity connection;
If
judge PT secondary side C phase reverse polarity connection;
If
judge PT secondary side L phase reverse polarity connection;
If
judge that PT secondary side A phase and B phase polarity all connect instead;
If
judge that PT secondary side A phase and C phase polarity all connect instead;
If
judge that PT secondary side B phase and C phase polarity all connect instead;
If
judge the phase sequence mistake between PT secondary side A phase and B are mutually, prompting need to be exchanged A, B phase sequence;
If
judge PT secondary side B phase and C phase phase sequence mistake, prompting need to be exchanged B, C phase sequence;
If
judge PT secondary side A phase and C phase phase sequence mistake, prompting need to be exchanged A, C phase sequence;
If
judge the secondary side b virtual connection of breaking mutually;
If
judge the secondary side c virtual connection of breaking mutually;
4. the message handler 22 of the secondary side device 2 of this tester sends to liquid crystal display 23 to show result of determination and relevant information.
In the time adopting the test of unidirectional electrical platen press, the message handler 22 of the secondary side device 2 of this tester sends order, the driving signal output part control solid-state relay SSR1 conducting of the controller 12 by primary side device 1, makes the negative pole (neutral point) of the secondary side of transformer directly; Do not drive solid-state relay SSR2 to make its disconnection; The message handler 22 of secondary side device 2 sends the corresponding command, the driving signal output part of the controller 12 by primary side device 1 drives solid-state relay SSR3, solid-state relay SSR4 and solid-state relay SSR5 conducting successively, the now voltage output end of the primary side device 1 of this tester output single-phase symmetrical voltage successively, i.e. A phase voltage UA, B phase output voltage U B and C phase output voltage U C.
The method that this tester adopts single-phase electricity platen press to test the polarity correctness of PT comprises the following steps:
5. pass through the keyboard 25 of the secondary side device 2 of this tester and manually select single-phase electricity platen press, primary side device 1 divides and applies following four groups of voltages for four times at the primary side of PT:
6. the secondary side device 2 of this tester is to corresponding sampling of PT secondary side voltage parameter:
When primary side device 1 applies voltage be
time, secondary side device 2 gathers
When primary side device 1 applies voltage be
time, secondary side device 2 gathers
When primary side device 1 applies voltage be
time, secondary side device 2 gathers
When primary side device 1 applies voltage be
time, secondary side device 2 gathers
7. the message handler 22 of the secondary side device 2 of this tester is judged as follows according to built-in program and criterion:
If the data that record for four times are respectively
judge that PT secondary connection is correct;
If record
judge PT secondary side wiring A phase incorrect polarity;
If record
judge PT secondary side wiring B phase incorrect polarity;
If record
judge PT secondary side wiring C phase incorrect polarity;
If the data that record for four times are respectively
judge PT secondary side wiring L phase incorrect polarity;
If record
judge that PT secondary side N exists fault mutually;
If record
judge the virtual connection of PT secondary side wiring A phase;
If record
judge the virtual connection of PT secondary side wiring B phase;
If record
judge the virtual connection of PT secondary side wiring C phase;
If record
judge PT secondary side wiring A, B phase phase sequence mistake, prompting need to be exchanged A, B phase connection;
If record
judge PT secondary side wiring B, C phase phase sequence mistake, prompting need to be exchanged B, C phase connection;
If record
judge PT secondary side wiring A, C phase phase sequence mistake, prompting need to be exchanged A, C phase connection;
8. the message handler 22 of the secondary side device 2 of this tester sends to liquid crystal display 23 to show result of determination and relevant information.
Above embodiment is the explanation to the specific embodiment of the present invention; but not limitation of the present invention; person skilled in the relevant technique without departing from the spirit and scope of the present invention; can also make various conversion and variation and obtain the corresponding technical scheme being equal to, therefore all technical schemes that are equal to all should be included into scope of patent protection of the present invention.
Claims (4)
1. a four stars shape voltage transformer secondary polarity intelligent tester, comprises primary side device (1), secondary side device (2) and power module, and described power module has power output end; It is characterized in that: described primary side device (1) comprises voltage generating circuit (11), controller (12), the first wireless communication module (13) and signal conditioning circuit (14); Voltage generating circuit (11) is provided with voltage input end, voltage output end, driving signal input and power end; Controller (12) is provided with first signal input end, secondary signal input end, signal output part and driving signal output part; The first wireless communication module (13) is provided with signal input part, signal output part and radio communication end; Signal conditioning circuit (14) is provided with voltage signal input end and signal output part; Secondary side device (2) comprises voltage acquisition translation circuit (21), message handler (22), liquid crystal display (23), the second wireless communication module (24) and keyboard (25); Voltage acquisition translation circuit (21) is provided with voltage input end and voltage signal output end; Message handler (22) is provided with voltage signal input end, keyboard signal input end, first signal input end, first signal output terminal and display output terminal; Liquid crystal display (23) is provided with signal input part; The second wireless communication module (24) is provided with signal input part, signal output part and radio communication end; Keyboard (25) is provided with signal output part;
The first signal input end of the controller (12) of primary side device (1) is electrically connected with the signal output part of the first wireless communication module (13); The secondary signal input end of controller (12) is electrically connected with the signal output part of signal conditioning circuit (14); The voltage signal input end of signal conditioning circuit (14) is electrically connected with the voltage output end of voltage generating circuit (11); The signal input part of the first wireless communication module (13) is electrically connected with the signal output part of controller (12); The driving signal input of voltage generating circuit (11) is electrically connected with the driving signal output part of controller (12); The power end of voltage generating circuit (11) is electrically connected with the power output end of power module; When use, the voltage input end of voltage generating circuit (11) is electrically connected with three-phase mains; The voltage output end of voltage generating circuit (11) is connected with the primary side power end three-phase electricity of four stars shape voltage transformer (VT);
The voltage signal input end of the message handler (22) of secondary side device (2) is electrically connected with the voltage signal output end of voltage acquisition translation circuit (21); The keyboard signal input end of message handler (22) is electrically connected with the signal output part of keyboard (25); The first signal input end of message handler (22) is electrically connected with the signal output part of the second wireless communication module (24); The signal input part of the second wireless communication module (24) is electrically connected with the first signal output terminal of message handler (22); The signal input part of liquid crystal display (23) is electrically connected with the display output terminal of message handler (22); The radio communication end of the second wireless communication module (24) is electrically connected with the radio communication end wireless signal of first wireless communication module (13) of primary side device (1); When use, the voltage input end of voltage acquisition translation circuit (21) is electrically connected with the secondary side power end of four stars shape voltage transformer (VT).
2. four stars shape voltage transformer secondary polarity intelligent tester according to claim 1, it is characterized in that: the voltage generating circuit (11) of described primary side device (1) comprises three-phase transformer, solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4, solid-state relay SSR5, triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14 and resistance R 15, solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4 and solid-state relay SSR5 all have totally 4 wiring pins 1 to No. 4, three-phase transformer has 3 armature windings and 3 secondary winding, and 3 armature windings and 3 secondary winding all have positive pole and negative pole, 3 secondary winding difference of three-phase transformer is called the first secondary winding, second subprime winding and level winding for the third time, the positive pole of 3 armature windings of three-phase transformer is the voltage input end of the voltage generating circuit (11) of described primary side device (1), the negative pole of 3 armature windings connects the earth, the negative pole of 3 secondary winding of three-phase transformer is electrically connected with No. 1 wiring pin of solid-state relay SSR1, No. 2 wiring pins of solid-state relay SSR1 connect that power supply ground, No. 3 wiring pins are electrically connected with one end of resistance R 1, No. 4 wiring pins are electrically connected with the collector of triode Q1, one end of the emitter-base bandgap grading of triode Q1 and resistance R 3 connects power supply ground jointly, one end conllinear of the base stage of triode Q1, the other end of resistance R 3 and resistance R 2, No. 1 wiring pin of the positive pole of the first secondary winding of three-phase transformer and solid-state relay SSR2 and No. 1 wiring pin conllinear of solid-state relay SSR3, No. 2 wiring pins of solid-state relay SSR2 connect that power supply ground, No. 3 wiring pins are electrically connected with one end of resistance R 4, No. 4 wiring pins are electrically connected with the collector of triode Q2, one end of the emitter-base bandgap grading of triode Q2 and resistance R 6 connects power supply ground jointly, one end conllinear of the base stage of triode Q2, the other end of resistance R 6 and resistance R 5, No. 3 wiring pins of solid-state relay SSR3 are electrically connected with one end of resistance R 7, No. 4 wiring pins are electrically connected with the collector of triode Q3, one end of the emitter-base bandgap grading of triode Q3 and resistance R 9 connects power supply ground jointly, one end conllinear of the base stage of triode Q3, the other end of resistance R 9 and resistance R 8, No. 1 wiring pin of solid-state relay SSR4 is electrically connected with the positive pole of the second subprime winding of three-phase transformer, No. 3 wiring pins of solid-state relay SSR4 are electrically connected with one end of resistance R 12, No. 4 wiring pins are electrically connected with the collector of triode Q4, one end of the emitter-base bandgap grading of triode Q4 and resistance R 11 connects power supply ground jointly, one end conllinear of the base stage of triode Q4, the other end of resistance R 11 and resistance R 10, No. 1 wiring pin of solid-state relay SSR5 is electrically connected with the positive pole of the winding of level for the third time of three-phase transformer, No. 3 wiring pins of solid-state relay SSR5 are electrically connected with one end of resistance R 15, No. 4 wiring pins are electrically connected with the collector of triode Q5, one end of the emitter-base bandgap grading of triode Q5 and resistance R 14 connects power supply ground jointly, one end conllinear of the base stage of triode Q5, the other end of resistance R 14 and resistance R 13,
No. 2 wiring pins of No. 2 wiring pins of solid-state relay SSR3, No. 2 wiring pins of solid-state relay SSR4, solid-state relay SSR5 form the voltage output end of voltage generating circuit (11) jointly; The other end, the other end of resistance R 10 and the other end of resistance R 13 of the other end of resistance R 2, the other end of resistance R 5, resistance R 8 forms the driving signal input of voltage generating circuit (11) jointly; The other end, the other end of resistance R 12 and the other end of resistance R 15 of the other end of resistance R 1, the other end of resistance R 4, resistance R 7 forms the power end of voltage generating circuit (11) jointly.
3. four stars shape voltage transformer secondary polarity intelligent tester according to claim 2, is characterized in that: described solid-state relay SSR1, solid-state relay SSR2, solid-state relay SSR3, solid-state relay SSR4 and solid-state relay SSR5 is Schneider SSR-10DA type single-phase solid relay.
4. four stars shape voltage transformer secondary polarity intelligent tester according to claim 3, is characterized in that: the single-chip microcomputer that the message handler (22) of described secondary side device (2) is model TMS320F2812.
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| CN201610888537.5A CN106324426B (en) | 2013-01-30 | 2013-01-30 | A kind of four wye voltage mutual inductor secondary polarity intelligent testers |
| CN201310035876.5A CN103969546B (en) | 2013-01-30 | 2013-01-30 | Four wye voltage transformer secondary polarity intelligent testers |
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| CN201310035876.5A CN103969546B (en) | 2013-01-30 | 2013-01-30 | Four wye voltage transformer secondary polarity intelligent testers |
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| CN201310035876.5A Active CN103969546B (en) | 2013-01-30 | 2013-01-30 | Four wye voltage transformer secondary polarity intelligent testers |
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| CN112965013A (en) * | 2021-03-17 | 2021-06-15 | 国网福建省电力有限公司龙岩供电公司 | Electric power measurement V-V wiring PT secondary reverse polarity judgment device |
| CN114325484A (en) * | 2021-12-23 | 2022-04-12 | 广州发展电力科技有限公司 | Method for checking wiring of secondary circuit of voltage transformer of generator |
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Also Published As
| Publication number | Publication date |
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| CN106324426A (en) | 2017-01-11 |
| CN103969546B (en) | 2016-12-07 |
| CN106324426B (en) | 2018-11-23 |
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