CN104867387A - Experiment teaching device used for simulating relaying principles of rail transit power supply system - Google Patents
Experiment teaching device used for simulating relaying principles of rail transit power supply system Download PDFInfo
- Publication number
- CN104867387A CN104867387A CN201510353342.6A CN201510353342A CN104867387A CN 104867387 A CN104867387 A CN 104867387A CN 201510353342 A CN201510353342 A CN 201510353342A CN 104867387 A CN104867387 A CN 104867387A
- Authority
- CN
- China
- Prior art keywords
- relay
- mutual inductor
- current
- reometer
- protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004088 simulation Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 12
- 238000004870 electrical engineering Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000009413 insulation Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/183—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses an experiment teaching device used for simulating the relaying principles of a rail transit power supply system. The device includes a DC frame protection experiment unit, a current protection wiring mode experiment unit and a leakage protection principle simulating experiment unit, wherein the DC frame protection experiment unit includes a DC power supply, an AC power supply and a current frame protection circuit or/and a voltage frame protection circuit. The experiment teaching device provided by the invention not only can visually reflect various protection principles and simulate normal operation situations, but also can visually reflect various fault situations, so that students in the electrical engineering specialty and practical operators can have a profound and intuitive understanding of the relaying principles of the rail transit power supply system; in addition, the device has the advantages of being safe, simple and convenient to operate, easy to implement in an ordinary laboratory, low in experiment condition requirements, highly targeted, and distinct in practicability.
Description
Technical field
The present invention relates to a kind of experimental teaching unit, specifically, relates to a kind of experimental teaching unit handing over the Principles of Relay Protection of electric power system for simulating rail.
Background technology
Current urban track traffic fast development, power supply protection technical development comparative maturity handed over by rail, and accordingly, tracking hands over the requirement of power supply profession personnel also to improve constantly.
Because rail interchange, DC power-supply system have employed multiple the means of relay protection; highly professional; there is the difficult problem that the content of courses is complicated and abstract; therefore this area needs a kind of experimental teaching unit handing over the Principles of Relay Protection of electric power system for simulating rail badly; to help teaching and to cultivate skilled addressee, but so far there are no correlation technique and Product Report.
Summary of the invention
The problems referred to above existed for prior art and demand, the object of this invention is to provide a kind of experimental teaching unit handing over the Principles of Relay Protection of electric power system for simulating rail.
For achieving the above object, the present invention adopts following technical scheme:
Handing over an experimental teaching unit for the Principles of Relay Protection of electric power system for simulating rail, comprising direct current frame protection experimental considerations unit, current protection mode of connection experimental considerations unit and simulation Leakage Protective Rule experimental considerations unit; Described direct current frame protection experimental considerations unit comprises:
DC power supply, comprises positive pole and negative pole, is in series with a constant resistance and one first slide rheostat between described positive pole and described negative pole;
AC power, comprises zero line and live wire;
Electric current frame protection circuit is or/and voltage frame protection circuit.
As a kind of embodiment, described electric current frame protection circuit comprises current relay, first auxiliary reclay and the first pilot lamp, after the normally opened contact of described current relay is in parallel with the normally opened contact of described first auxiliary reclay, again and the Inside coil of described first auxiliary reclay be connected between described zero line and described live wire, normally closed contact and described first pilot lamp of described first auxiliary reclay are connected between described zero line and described live wire, one end of the Inside coil of described current relay connects negative pole by described first slide rheostat, the other end of the Inside coil of described current relay passes through a reometer again through the second slide rheostat ground connection.
As a kind of embodiment, described voltage frame protection circuit comprises voltage relay, second auxiliary reclay and the second pilot lamp, after the normally opened contact of described voltage relay is in parallel with a wherein width normally opened contact of described second auxiliary reclay, again and the Inside coil of described second auxiliary reclay be connected between described zero line and described live wire, normally closed contact and described second pilot lamp of described second auxiliary reclay are connected between described zero line and described live wire, one end of the Inside coil of described voltage relay is by described second slide rheostat ground connection, another termination negative pole of the Inside coil of described voltage relay, the two ends of described voltage relay Inside coil are connected to after another secondary normally opened contact of described second auxiliary reclay is in parallel with a voltage table.
As a kind of embodiment, described current protection mode of connection experimental considerations unit comprises at least one in 2CT mono-relay current protection Wiring module, 2CT bis-relay current protection Wiring module, 2CT tri-relay current protection Wiring module.
As further embodiment, described 2CT mono-relay current protection Wiring module comprises:
The A phase primary circuit wiring of the former limit different name end-A phase load resistant series one-tenth of former limit Same Name of Ends-the first mutual inductor of A cross streams power supply-the first reometer-the first mutual inductor;
The B phase primary circuit wiring that B cross streams power supply-B phase load resistant series becomes;
The C phase primary circuit wiring of the former limit different name end-C phase load resistant series one-tenth of former limit Same Name of Ends-the second mutual inductor of C cross streams power supply-the second reometer-the second mutual inductor;
The second loop return wiring of the secondary different name end composition of secondary Same Name of Ends-the first mutual inductor of secondary different name end-the second mutual inductor of secondary Same Name of Ends-three reometer-four reometer-the second mutual inductor of the first mutual inductor;
Three, the relay circuit of the secondary different name end composition of secondary Same Name of Ends-the first mutual inductor of secondary different name end-the second mutual inductor of tie point-five reometer-the first current relay-the second mutual inductor of the 4th reometer.
As further embodiment, described 2CT bis-relay current protection Wiring module comprises:
The A phase primary circuit wiring of the former limit different name end-A phase load resistant series one-tenth of former limit Same Name of Ends-three mutual inductor of A cross streams power supply-six reometer-three mutual inductor;
The B phase primary circuit wiring that B cross streams power supply-B phase load resistant series becomes;
The C phase primary circuit wiring of the former limit different name end-C phase load resistant series one-tenth of former limit Same Name of Ends-four mutual inductor of C cross streams power supply-seven reometer-four mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-eight reometer-the second current relay-the three, the 4th mutual inductor of the 3rd mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-nine reometer-three current relay-the three, the 4th mutual inductor of the 4th mutual inductor.
As further embodiment, described 2CT tri-relay current protection Wiring module comprises:
The A phase primary circuit wiring of the former limit different name end-A phase load resistant series one-tenth of former limit Same Name of Ends-five mutual inductor of A cross streams power supply-ten reometer-five mutual inductor;
The B phase primary circuit wiring that B cross streams power supply-B phase load resistant series becomes;
The C phase primary circuit wiring of the former limit different name end-C phase load resistant series one-tenth of former limit Same Name of Ends-six mutual inductor of C cross streams power supply-11 reometer-six mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-12 reometer-four current relay-six current relay-14 reometer-the five, the 6th mutual inductor of the 5th mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-13 reometer-five current relay-six current relay-14 reometer-the five, the 6th mutual inductor of the 6th mutual inductor.
As a kind of embodiment, described simulation Leakage Protective Rule experimental considerations unit comprises leakage analog device and protective relaying device.
As further embodiment, described leakage analog device comprises:
The load circuit wiring that the live wire-15 reometers-forward of AC power is connected into through the zero line of coil-the first pull-up resistor-reverse coil-AC power through current transformer of current transformer;
The leakage protection loop correct wiring that the live wire-15 reometers-forward of AC power is connected into through the zero line of coil-the first switch the-the first leak resistance-AC power of current transformer;
The leakage protection loop false wiring that the zero line of live wire-15 reometers-second switch the-the second leak resistance-AC power of AC power is connected into.
As further embodiment, described protective relaying device comprises:
The earth leakage protection relay action circuit wiring that current transformer-16 reometers-relay-current transformer is connected into;
The earth leakage protection signal designation wiring that the zero line of the normally opened contact-signal lamp-AC power of the live wire-relay of AC power is connected into.
As a kind of preferred version, described first mutual inductor and the identical no-load voltage ratio of described second mutual inductor.
As a kind of preferred version, described 3rd mutual inductor and the identical no-load voltage ratio of described 4th mutual inductor.
As a kind of preferred version, described 5th mutual inductor and the identical no-load voltage ratio of described 6th mutual inductor.
Compared to prior art, the present invention has following beneficial effect:
1, can the experimental teaching of analog current frame protection, the experimental teaching of the voltage frame protection when current return detected value does not reach setting valve requirement can be simulated again, and experimental phenomena is simple and clear;
2, not only can simulate the experimental teaching of the mode of connection in the various situations such as three-phase symmetrical normally works, dissymmetrical load, single-phase grounding fault, two-phase short-circuit fault, three-phase ground short trouble, and the action situation of the various current protection mode of connection is simple and clear;
3, both can intuitively express earth leakage protection operating principle, visual experiment teaching can be carried out to two kinds of action situations under correct wiring and incorrect wiring again;
In a word, experimental teaching unit provided by the invention can not only intuitively reflect each protection philosophy, situation when simulation normally runs, and can intuitively reflect all kinds of failure condition, the student of electrician's electric specialty and Practical Operation personnel tracking can be made to hand over the Principles of Relay Protection of electric power system to obtain heightened awareness and understanding directly perceived, is a practical platform of good teaching promoting integration capability; In addition, experimental teaching unit of the present invention also has handling safety, simple, conveniently, be easy in the indoor realization of routine experimentation, the advantages such as requirement for experiment condition is low, with strong points, have obvious practicality.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation handing over the experimental teaching unit of the Principles of Relay Protection of electric power system for simulating rail provided by the invention;
Fig. 2 is the electrical block diagram of the first direct current frame protection experimental considerations unit provided by the invention;
Fig. 3 is the electrical block diagram of the second direct current frame protection experimental considerations unit provided by the invention;
Fig. 4 is the electrical block diagram of the third direct current frame protection experimental considerations unit provided by the invention;
Fig. 5 is the structured flowchart of a kind of current protection mode of connection experimental considerations unit provided by the invention;
Fig. 6 is the electrical block diagram of 2CT mono-relay current protection Wiring module provided by the invention;
Fig. 7 is the electrical block diagram of 2CT bis-relay current protection Wiring module provided by the invention;
Fig. 8 is the electrical block diagram of 2CT tri-relay current protection Wiring module provided by the invention;
Fig. 9 is a kind of electrical block diagram of simulating Leakage Protective Rule experimental considerations unit provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, clear, complete description and discussion are carried out to technical scheme of the present invention.
As shown in Figure 1, the experimental teaching unit of a kind of Principles of Relay Protection for simulating rail friendship electric power system provided by the invention comprises: direct current frame protection experimental considerations unit, current protection mode of connection experimental considerations unit and simulation Leakage Protective Rule experimental considerations unit.
Figure 2 shows that the electrical block diagram of the first direct current frame protection experimental considerations unit provided by the invention; as shown in Figure 2; the direct current frame protection experimental considerations unit of the present embodiment is made up of DC power supply, single phase alternating current power supply and electric current frame protection circuit; wherein: the positive pole DC+ of DC power supply has connected with negative pole DC-constant resistance R1 and the first slide rheostat R2; electric capacity in figure is the electric capacity between simulated air and both positive and negative polarity; do not connect electric capacity in reality, simulate subway direct-current traction power supply voltage 1500V by 220V DC voltage.Constant resistance R1 is connected between DC+ and DC-after being connected with the first slide rheostat R2, and constant resistance R1, the first slide rheostat R2 and electric capacity simulate positive mother and ground respectively, bear the electric capacity between mother and ground and large resistance, under normal circumstances, and R1=R
eF=∞.Ground in the present embodiment refers to experimental provision (experimental provision is reliable ground).
Described electric current frame protection circuit is connected between the zero line N of single phase alternating current power supply and live wire L, comprise current relay I, intermediate relay ZJ 1 and pilot lamp L1, X1, X2 is respectively normally opened contact and the normally closed contact of intermediate relay ZJ 1, after the normally opened contact of current relay I is in parallel with the normally opened contact X1 of intermediate relay ZJ 1 again and the Inside coil of intermediate relay ZJ 1 be connected between zero line N and live wire L, the normally closed contact X2 of intermediate relay ZJ 1 and pilot lamp L1 is connected between zero line N and live wire L, one end of the Inside coil of current relay I meets negative pole DC-by the first slide rheostat R2, the other end of the Inside coil of current relay I passes through a reometer A again through the second slide rheostat R3 ground connection.Second slide rheostat R3 represents the resistance in current detection circuit; it is for simulating rail insulation resistance over the ground; its value is along with the performance change of insulating material; when system insulation occurs to destroy; if when R3 is excessive; then current detection value does not reach setting valve, and now needing provides voltage frame protection to shield in addition.
Figure 3 shows that the electrical block diagram of the second direct current frame protection experimental considerations unit provided by the invention, as shown in Figure 3, the direct current frame protection experimental considerations unit of the present embodiment is made up of DC power supply, single phase alternating current power supply and voltage frame protection circuit.When system insulation occurs to destroy, if when R3 is excessive, then current detection value does not reach setting valve, now needs voltage frame protection to shield.
Described voltage frame protection circuit is connected between the zero line N of single phase alternating current power supply and live wire L, comprise: voltage relay V, intermediate relay ZJ 2 and pilot lamp L2,1X3,2X3 are respectively two width normally opened contacts of intermediate relay ZJ 2, and X4 is the normally closed electric shock of intermediate relay ZJ 2; Voltage relay V is first connected with negative pole and R3 more respectively with after 2X3, voltage table V parallel connection; By after in parallel with 1X3 for the coil of voltage relay V again and the coils connected in series of intermediate relay ZJ 2 access between the 220V AC power of single phase alternating current power supply; To connect after X4 is connected with pilot lamp L2 and between 220V AC power.One end of the Inside coil of described voltage relay V is by described second slide rheostat R3 ground connection, another termination negative pole of the Inside coil of described voltage relay V, is connected to the two ends of described voltage relay V Inside coil after the normally opened contact 2X3 of described second intermediate relay ZJ 2 is in parallel with a voltage table V.
Figure 4 shows that the electrical block diagram of the third direct current frame protection experimental considerations unit provided by the invention; as shown in Figure 4, the direct current frame protection experimental considerations unit of the present embodiment is made up of DC power supply, single phase alternating current power supply, electric current frame protection circuit and voltage frame protection circuit.It had both included electric current frame protection, included again voltage frame protection.When system insulation occurs to destroy, if when R3 is excessive, then current detection value does not reach setting valve, now needs voltage frame protection to shield.
As shown in Figure 5, current protection mode of connection experimental considerations unit of the present invention can comprise: at least one in 2CT mono-relay current protection Wiring module (or being called biphase current differential wire module), 2CT bis-relay current protection Wiring module (or being called two-phase incomplete star connection module) and 2CT tri-relay current protection Wiring module.Each Wiring module all can simulate the wiring experiment of normal work, singlephase earth fault and phase-to phase fault.
As shown in Figure 6: described 2CT mono-relay current protection Wiring module comprises: the current transformer (CT1, CT2) of 2 identical no-load voltage ratios; 1 current relay (DL1); the reometer (A1, A2) of 2 display load currents, the reometer (A3, A4) of 2 display mutual inductor secondary currents, the reometer (A5) of 1 display current relay DL1 loop current, the pull-up resistor RL1 that three-phase is adjustable.
Circuit specifically connects:
The loop of the former limit different name end-A phase load resistant series one-tenth of former limit Same Name of Ends-the first mutual inductor CT1 of A cross streams power supply-reometer A1-first mutual inductor CT1 is the primary circuit wiring of A phase; The loop that B cross streams power supply-B phase load resistant series becomes is the primary circuit wiring of B phase; The loop of the former limit different name end-C phase load resistant series one-tenth of former limit Same Name of Ends-the second mutual inductor CT2 of C cross streams power supply-reometer A2-second mutual inductor CT2 is the primary circuit wiring of C phase;
The second loop return wiring of the secondary different name end composition of secondary Same Name of Ends (as figure " * " end)-the first mutual inductor CT1 of secondary different name end-the second mutual inductor CT2 of secondary Same Name of Ends (as figure " * " end)-three reometer A3-the 4th reometer A4-second mutual inductor CT2 of the first mutual inductor CT1;
The relay circuit that the secondary different name end of secondary Same Name of Ends (holding as schemed " * ")-the first mutual inductor CT1 of secondary different name end-the second mutual inductor CT2 of the tie point-five reometer A5-first current relay DL1-second mutual inductor CT2 of the 3rd reometer A3 and the 4th reometer A4 forms.
The Current Transmit 1 of two identical no-load voltage ratios, CT2 are placed in A, C two-phase respectively, pull-up resistor RL1 is adjusted to three-phase symmetrical, asymmetric, singlephase earth fault, phase fault, intuitively can observes reading and the DL1 action situation of the several reometers under the different mode of connection.
As shown in Figure 7: described 2CT bis-relay current protection Wiring module comprises: the current transformer (CT3, CT4) of 2 identical no-load voltage ratios; 2 current relay (DL2, DL3); the reometer (A6, A7) of 2 display load currents; the reometer (A8, A9) of 2 display mutual inductor secondary currents, the pull-up resistor RL2 that three-phase is adjustable.
Circuit specifically connects:
The loop of the former limit different name end-A phase load resistant series one-tenth of the former limit Same Name of Ends-three mutual inductor CT3 of A cross streams power supply-reometer A6-the 3rd mutual inductor CT3 is the primary circuit wiring of A phase; The loop that B cross streams power supply-B phase load resistant series becomes is the primary circuit wiring of B phase; The loop of the former limit different name end-C phase load resistant series one-tenth of the former limit Same Name of Ends-four mutual inductor CT4 of C cross streams power supply-reometer A7-the 4th mutual inductor CT4 is the primary circuit wiring of C phase;
The Article 1 relay circuit of secondary Same Name of Ends (as figure " * " end)-eight reometer A8-second current relay DL2-the 3rd mutual inductor CT3 of the 3rd mutual inductor CT3, the secondary different name end composition of the 4th mutual inductor CT4;
The Article 2 relay circuit of secondary Same Name of Ends (as figure " * " end)-nine reometer A9-the 3rd current relay DL3-the 3rd mutual inductor CT3 of the 4th mutual inductor CT4, the secondary different name end composition of the 4th mutual inductor CT4.
The Current Transmit 3 of two identical no-load voltage ratios, CT4 are placed in A, C two-phase respectively, pull-up resistor RL2 is adjusted to three-phase symmetrical, asymmetric, singlephase earth fault, phase fault, intuitively can observes reading and DL2, DL3 action situation of the several reometers under the different mode of connection.
As shown in Figure 8: described 2CT tri-relay current protection Wiring module comprises: the current transformer (CT5, CT6) of 2 identical no-load voltage ratios; 3 current relay (DL4, DL5, DL6); the reometer (A10, A11) of 2 display load currents; the reometer (A12, A13) of 2 display mutual inductor secondary currents; the reometer (A14) of 1 display current relay DL6 loop current, the pull-up resistor RL3 that three-phase is adjustable.
Circuit specifically connects:
The loop of the former limit different name end-A phase load resistant series one-tenth of the former limit Same Name of Ends-five mutual inductor CT5 of A cross streams power supply-reometer A10-the 5th mutual inductor CT5 is the primary circuit wiring of A phase; The loop that B cross streams power supply-B phase load resistant series becomes is the primary circuit wiring of B phase; The loop of the former limit different name end-C phase load resistant series one-tenth of the former limit Same Name of Ends-six mutual inductor CT6 of C cross streams power supply-reometer A11-the 6th mutual inductor CT6 is the primary circuit wiring of C phase;
The Article 1 relay circuit of secondary Same Name of Ends-12 reometer A12-the 4th current relay DL4-the 6th current relay DL6-the 14 reometer A14-the 5th mutual inductor CT5 of the 5th mutual inductor CT5, the secondary different name end composition of the 6th mutual inductor CT6;
The Article 2 relay circuit of secondary Same Name of Ends-13 reometer A13-the 5th current relay DL5-the 6th current relay DL6-the 14 reometer A14-the 5th mutual inductor CT5 of the 6th mutual inductor CT6, the secondary different name end composition of the 6th mutual inductor CT6.
The Current Transmit 5 of two identical no-load voltage ratios, CT6 are placed in A, C two-phase respectively, pull-up resistor RL3 is adjusted to three-phase symmetrical, asymmetric, singlephase earth fault, phase fault, intuitively can observes reading and DL4, DL5, DL6 action situation of the several reometers under the different mode of connection.
As shown in Figure 9; simulation Leakage Protective Rule experimental considerations unit of the present invention comprises: 1 Current Transmit; 1 current relay I; 1 signal lamp is as earth leakage protective action indicator; 15 reometer A15 of 1 display load current; 16 reometer A16 of 1 display mutual inductor secondary current, a tunable load resistance R1, adjustable resistance R2, R3 of two simulation leak impedances.
Physical circuit connects:
AC power live wire-15 reometer A15-is load circuit wiring through the reverse loop be connected into through mutual inductor CT coil-zero line of mutual inductor CT coil-pull-up resistor R1-;
AC power live wire-15 reometer A15-is leakage protection loop correct wiring through the loop that mutual inductor CT coil-switch S 1-leak resistance R2-zero line is connected into;
The loop that AC power live wire-15 reometer A15 switch S 2-leak resistance R3-zero line is connected into is leakage protection loop false wiring;
Current transformer-16 reometer A16-relay-current transformer series connection is the wiring of earth leakage protection relay action circuit;
AC power live wire-relay normally open contact-signal lamp L-AC power zero line series connection is the wiring of earth leakage protection signal designation.
Live wire is passed Current Transmit coil through reometer, after connecting pull-up resistor R1, pass back through Current Transmit coil and be connected to zero line, by the leak resistance R2 of simulation leak impedance through Current Transmit place in circuit, Closing Switch S1 and adjustment leak resistance R2, the reading of the several reometer of Observable and current relay I action situation; By the leak resistance R3 of simulation leak impedance without the direct place in circuit of Current Transmit, Closing Switch S2 and adjustment leak resistance R3, the reading of the several reometer of Observable and actuating of relay situation.
When there is drain conditions, relay I action, the normal bright instruction of signal lamp L, feeds back to power supply, deenergization simultaneously; When after failure removal, shutdown signal lamp L, again closed power supply.
Adopt device of the present invention can realize following experimental teaching content:
1, slide rheostat R2 is moved to an E, now R1=R
eF, now Leakage Current is very little, the coil of intermediate relay ZJ 1 not electric, its normally closed contact closes, and instruction L1, L2 lamp is bright.
2, slide rheostat R2 is moved to M point (simulate when negative between mother and track during insulation damages), namely between GND and negative pole DC-, resistance becomes R now
fMthus expression insulation breakdown, DC equipment to the electric discharge of cabinet shell or short circuit, resistance decreasing, (arrow indication loop in Fig. 2, leakage of current loop, from DC+ through the coil of R3, current relay I, again through M point arrival DC-) reach current relay setting valve, then current relay I action, intermediate relay ZJ 1 coil obtains electric, and its normally opened contact X1 closes, normally closed contact X2 disconnects, and now pilot lamp L1 extinguishes.
3, slide rheostat R3 is regulated, when R3 is very large, now leakage of current loop detected value does not reach the requirement of current setting, and voltage circuit voltage reaches its voltage setting valve, then voltage relay V action, the coil of intermediate relay ZJ 2 obtains electric, its normally opened contact 1X3,2X3 are closed, normally closed contact X4 disconnects, and now pilot lamp L2 extinguishes, and the vanishing of rail epd.
When 4, regulating threephase load be symmetrical, observe each reometer reading under the various mode of connection, observe relay whether action.
5, artificially manufacture A phase ground short circuit fault, B phase ground short circuit fault, C phase ground short circuit fault, observe each reometer reading under the various mode of connection, the whether action of observation relay.
6, artificial manufacture AC phase fault, AB phase fault, BC phase fault, observe each reometer reading under the various mode of connection and actuating of relay situation.
If 7 by the Same Name of Ends wrong of one of them mutual inductor secondary, observe the experimental phenomena that there will be.
8, three kinds of modes of connection contrast, and analyze its sensitivity, accuracy, response situation to B phase fault, analyze the applicable situation of the various mode of connection from economy, reliability aspect.
9, closed S1, simulation drain conditions one, regulates leak resistance R2, observes reometer A15 and A16 registration and actuating of relay situation.
10, closed S2, simulation drain conditions two, regulates leak resistance R3, observes reometer A15 and A16 registration and actuating of relay situation.
Visible in sum: experimental teaching unit provided by the invention can not only intuitively reflect each protection philosophy, situation when simulation normally runs, and can intuitively reflect all kinds of failure condition, the student of electrician's electric specialty and Practical Operation personnel tracking can be made to hand over the Principles of Relay Protection of electric power system to obtain heightened awareness and understanding directly perceived, is a practical platform of good teaching promoting integration capability; In addition, experimental teaching unit of the present invention also has handling safety, simple, conveniently, be easy in the indoor realization of routine experimentation, the advantages such as requirement for experiment condition is low, with strong points, have obvious practicality.
Finally be necessary to herein means out: the foregoing is only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. handing over an experimental teaching unit for the Principles of Relay Protection of electric power system for simulating rail, it is characterized in that: comprise direct current frame protection experimental considerations unit, current protection mode of connection experimental considerations unit and simulation Leakage Protective Rule experimental considerations unit; Described direct current frame protection experimental considerations unit comprises:
DC power supply, comprises positive pole and negative pole, is in series with a constant resistance and one first slide rheostat between described positive pole and described negative pole;
AC power, comprises zero line and live wire;
Electric current frame protection circuit is or/and voltage frame protection circuit.
2. experimental teaching unit according to claim 1, it is characterized in that: described electric current frame protection circuit comprises current relay, first auxiliary reclay and the first pilot lamp, after the normally opened contact of described current relay is in parallel with the normally opened contact of described first auxiliary reclay, again and the Inside coil of described first auxiliary reclay be connected between described zero line and described live wire, normally closed contact and described first pilot lamp of described first auxiliary reclay are connected between described zero line and described live wire, one end of the Inside coil of described current relay connects negative pole by described first slide rheostat, the other end of the Inside coil of described current relay passes through a reometer again through the second slide rheostat ground connection.
3. experimental teaching unit according to claim 1, it is characterized in that: described voltage frame protection circuit comprises voltage relay, second auxiliary reclay and the second pilot lamp, after the normally opened contact of described voltage relay is in parallel with a wherein width normally opened contact of described second auxiliary reclay, again and the Inside coil of described second auxiliary reclay be connected between described zero line and described live wire, normally closed contact and described second pilot lamp of described second auxiliary reclay are connected between described zero line and described live wire, one end of the Inside coil of described voltage relay is by described second slide rheostat ground connection, another termination negative pole of the Inside coil of described voltage relay, the two ends of described voltage relay Inside coil are connected to after another secondary normally opened contact of described second auxiliary reclay is in parallel with a voltage table.
4. experimental teaching unit according to claim 1, is characterized in that: described current protection mode of connection experimental considerations unit comprises at least one in 2CT mono-relay current protection Wiring module, 2CT bis-relay current protection Wiring module, 2CT tri-relay current protection Wiring module.
5. experimental teaching unit according to claim 4, is characterized in that, described 2CT mono-relay current protection Wiring module comprises:
The A phase primary circuit wiring of the former limit different name end-A phase load resistant series one-tenth of former limit Same Name of Ends-the first mutual inductor of A cross streams power supply-the first reometer-the first mutual inductor;
The B phase primary circuit wiring that B cross streams power supply-B phase load resistant series becomes;
The C phase primary circuit wiring of the former limit different name end-C phase load resistant series one-tenth of former limit Same Name of Ends-the second mutual inductor of C cross streams power supply-the second reometer-the second mutual inductor;
The second loop return wiring of the secondary different name end composition of secondary Same Name of Ends-the first mutual inductor of secondary different name end-the second mutual inductor of secondary Same Name of Ends-three reometer-four reometer-the second mutual inductor of the first mutual inductor;
Three, the relay circuit of the secondary different name end composition of secondary Same Name of Ends-the first mutual inductor of secondary different name end-the second mutual inductor of tie point-five reometer-the first current relay-the second mutual inductor of the 4th reometer.
6. experimental teaching unit according to claim 4, is characterized in that: described 2CT bis-relay current protection Wiring module comprises:
The A phase primary circuit wiring of the former limit different name end-A phase load resistant series one-tenth of former limit Same Name of Ends-three mutual inductor of A cross streams power supply-six reometer-three mutual inductor;
The B phase primary circuit wiring that B cross streams power supply-B phase load resistant series becomes;
The C phase primary circuit wiring of the former limit different name end-C phase load resistant series one-tenth of former limit Same Name of Ends-four mutual inductor of C cross streams power supply-seven reometer-four mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-eight reometer-the second current relay-the three, the 4th mutual inductor of the 3rd mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-nine reometer-three current relay-the three, the 4th mutual inductor of the 4th mutual inductor.
7. experimental teaching unit according to claim 4, is characterized in that: described 2CT tri-relay current protection Wiring module comprises:
The A phase primary circuit wiring of the former limit different name end-A phase load resistant series one-tenth of former limit Same Name of Ends-five mutual inductor of A cross streams power supply-ten reometer-five mutual inductor;
The B phase primary circuit wiring that B cross streams power supply-B phase load resistant series becomes;
The C phase primary circuit wiring of the former limit different name end-C phase load resistant series one-tenth of former limit Same Name of Ends-six mutual inductor of C cross streams power supply-11 reometer-six mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-12 reometer-four current relay-six current relay-14 reometer-the five, the 6th mutual inductor of the 5th mutual inductor;
The relay circuit of the secondary different name end composition of secondary Same Name of Ends-13 reometer-five current relay-six current relay-14 reometer-the five, the 6th mutual inductor of the 6th mutual inductor.
8. experimental teaching unit according to claim 1, is characterized in that: described simulation Leakage Protective Rule experimental considerations unit comprises leakage analog device and protective relaying device.
9. experimental teaching unit according to claim 8, is characterized in that, described leakage analog device comprises:
The load circuit wiring that the live wire-15 reometers-forward of AC power is connected into through the zero line of coil-the first pull-up resistor-reverse coil-AC power through current transformer of current transformer;
The leakage protection loop correct wiring that the live wire-15 reometers-forward of AC power is connected into through the zero line of coil-the first switch the-the first leak resistance-AC power of current transformer;
The leakage protection loop false wiring that the zero line of live wire-15 reometers-second switch the-the second leak resistance-AC power of AC power is connected into.
10. experimental teaching unit according to claim 8, is characterized in that, described protective relaying device comprises:
The earth leakage protection relay action circuit wiring that current transformer-16 reometers-relay-current transformer is connected into;
The earth leakage protection signal designation wiring that the zero line of the normally opened contact-signal lamp-AC power of the live wire-relay of AC power is connected into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510353342.6A CN104867387B (en) | 2015-06-23 | 2015-06-23 | A kind of experimental teaching unit for being used to simulate the Principles of Relay Protection that rail hands over electric power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510353342.6A CN104867387B (en) | 2015-06-23 | 2015-06-23 | A kind of experimental teaching unit for being used to simulate the Principles of Relay Protection that rail hands over electric power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104867387A true CN104867387A (en) | 2015-08-26 |
| CN104867387B CN104867387B (en) | 2017-08-25 |
Family
ID=53913190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510353342.6A Expired - Fee Related CN104867387B (en) | 2015-06-23 | 2015-06-23 | A kind of experimental teaching unit for being used to simulate the Principles of Relay Protection that rail hands over electric power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104867387B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206151A (en) * | 2015-10-28 | 2015-12-30 | 北京工业大学 | Integrated analog electronic technical experiment teaching platform and implementation method |
| CN107145181B (en) * | 2017-06-09 | 2018-05-08 | 中山大学 | A kind of main circuit for high-power electrical fire test |
| CN109959831A (en) * | 2019-04-17 | 2019-07-02 | 成都航空职业技术学院 | A kind of laboratory simulation unmanned plane power-supply system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257201A (en) * | 2007-02-09 | 2008-09-03 | 天津新技术产业园区凯发电气成套设备有限公司 | Direct current protecting observe and control system |
| CN202422463U (en) * | 2011-12-15 | 2012-09-05 | 成都运达科技股份有限公司 | Simulation training system of relay protection in subway OCC (Open Circuit Characteristic) electric power dispatching |
| CN202455049U (en) * | 2012-01-19 | 2012-09-26 | 无锡市科环自动化设备有限公司 | Feeder failure backup protection device of track traffic power supply system |
| CN102956133A (en) * | 2012-11-29 | 2013-03-06 | 保定供电公司 | Function demonstrating template of electric leakage protector |
| CN202978218U (en) * | 2012-12-27 | 2013-06-05 | 湖南恒信电气有限公司 | Intelligent earth leakage protection device for urban rail transit |
| CN203014361U (en) * | 2012-12-21 | 2013-06-19 | 上海申通地铁集团有限公司维护保障中心 | Traction transformer substation framework protection system of rail transportation line |
| CN203261016U (en) * | 2013-05-29 | 2013-10-30 | 西南交通大学 | Traction power supply system for thyristor rectification |
| CN203445606U (en) * | 2013-05-29 | 2014-02-19 | 西南交通大学 | Direct current traction power supply system |
-
2015
- 2015-06-23 CN CN201510353342.6A patent/CN104867387B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257201A (en) * | 2007-02-09 | 2008-09-03 | 天津新技术产业园区凯发电气成套设备有限公司 | Direct current protecting observe and control system |
| CN202422463U (en) * | 2011-12-15 | 2012-09-05 | 成都运达科技股份有限公司 | Simulation training system of relay protection in subway OCC (Open Circuit Characteristic) electric power dispatching |
| CN202455049U (en) * | 2012-01-19 | 2012-09-26 | 无锡市科环自动化设备有限公司 | Feeder failure backup protection device of track traffic power supply system |
| CN102956133A (en) * | 2012-11-29 | 2013-03-06 | 保定供电公司 | Function demonstrating template of electric leakage protector |
| CN203014361U (en) * | 2012-12-21 | 2013-06-19 | 上海申通地铁集团有限公司维护保障中心 | Traction transformer substation framework protection system of rail transportation line |
| CN202978218U (en) * | 2012-12-27 | 2013-06-05 | 湖南恒信电气有限公司 | Intelligent earth leakage protection device for urban rail transit |
| CN203261016U (en) * | 2013-05-29 | 2013-10-30 | 西南交通大学 | Traction power supply system for thyristor rectification |
| CN203445606U (en) * | 2013-05-29 | 2014-02-19 | 西南交通大学 | Direct current traction power supply system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206151A (en) * | 2015-10-28 | 2015-12-30 | 北京工业大学 | Integrated analog electronic technical experiment teaching platform and implementation method |
| CN105206151B (en) * | 2015-10-28 | 2019-04-12 | 北京工业大学 | A kind of Analog Electronics Technique Experiment comprehensive teaching platform and implementation method |
| CN107145181B (en) * | 2017-06-09 | 2018-05-08 | 中山大学 | A kind of main circuit for high-power electrical fire test |
| CN109959831A (en) * | 2019-04-17 | 2019-07-02 | 成都航空职业技术学院 | A kind of laboratory simulation unmanned plane power-supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104867387B (en) | 2017-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100580470C (en) | Phase amount and zero sequence amount combined realization powerline both-end distance measuring method | |
| CN202916384U (en) | Improved voltage transformer zero sequence circuit system capable of improving precision of line selection and fault positioning | |
| CN104867387A (en) | Experiment teaching device used for simulating relaying principles of rail transit power supply system | |
| CN103969548A (en) | Grounding line selecting and ground fault section positioning method for arc suppression coil | |
| CN104749484A (en) | Electric-leakage monitoring device | |
| CN202351365U (en) | Small-current grounding alarm equipment and alarm system | |
| Rambabu et al. | Three zone protection by using distance relays in simulink/matlab | |
| CN104133152B (en) | DC detecting device during single-phase earthing of small current earthing system | |
| CN201886097U (en) | Debugging device for arc-suppression coil | |
| CN104751715A (en) | Electric shock fault simulation training device and testing method | |
| WO2014153729A1 (en) | Bipolar high/low voltage converter station for series mtdc system | |
| CN202956482U (en) | Small current system single-phase grounding fault detection verifying device | |
| CN103809039A (en) | Method for testing current transformers in substation | |
| CN110912102A (en) | Low-voltage power supply network leakage fault protection method based on zero phase transfer | |
| CN206517035U (en) | Low-voltage distribution cabinet broken neutral line protection device | |
| CN103048586A (en) | Verification method for wiring correction of voltage transformer | |
| CN202383923U (en) | Skill practicing and training platform for electricians | |
| CN106972462A (en) | Low-voltage distribution cabinet broken neutral line protection device and detection method | |
| CN105914723B (en) | The switching device of residual current circuit breaker | |
| CN204759855U (en) | Experimental device for an electric current protection wiring for simulating among rail friendship power supply system | |
| CN210270042U (en) | Direct current defect eliminating device | |
| CN209859429U (en) | Electric leakage investigation simulation teaching device | |
| Sidhu et al. | A numerical technique based on symmetrical components for protecting three-winding transformers | |
| CN202548290U (en) | Vacuum circuit breaker synchronous detector | |
| CN106896336A (en) | A kind of DC power system ground fault detection apparatus testing stand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170825 |