CN109917203B - Detection device and test method for electric traction - Google Patents
Detection device and test method for electric traction Download PDFInfo
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- CN109917203B CN109917203B CN201910072001.XA CN201910072001A CN109917203B CN 109917203 B CN109917203 B CN 109917203B CN 201910072001 A CN201910072001 A CN 201910072001A CN 109917203 B CN109917203 B CN 109917203B
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Abstract
The invention relates to a detection device and a test method for electric traction, belonging to the technical field of electric traction rail transit, and aiming at solving the technical problem of providing the detection device and the test method for electric traction, the invention adopts the technical scheme that the detection device comprises a detection device body, a detection device body and a detection device body; a detection device for electric traction, comprising: the detection main loop of the detection device comprises: the high-voltage protection circuit comprises a high-voltage wiring terminal TB1, a high-voltage wiring terminal TB2, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a high-voltage single-phase isolated switch QS1, a high-voltage single-phase isolated switch QS2, a high-voltage single-phase isolated switch QS3, a high-voltage single-phase isolated switch QS4, a high-voltage overvoltage protector F2, a reactor L1, a reactor L2, a reactor L3, an ammeter PA 1; the equipment is widely applied to the field of electric traction rail transit.
Description
Technical Field
The invention belongs to the technical field of electric traction rail transit, and particularly relates to a detection device for electric traction.
Background
When the rail vehicle is electrically towed, the necessary condition for normal work of the rail vehicle is that electricity is taken from a contact net and is converted into mechanical energy to be driven. In actual operation of the train, the traction system must be friendly-matched with the power grid, namely: low interference current, high power factor, 4QS operation, etc.
In the design and manufacturing process of a high-power high-low voltage electric traction device, due to the irregularity of a contact network or the vibration of a pantograph, the phenomena of instantaneous overvoltage and overcurrent of a converter and even damage of devices can usually occur in the actual bow jumping working condition of the pantograph in the running process and the special transition process of sudden drop of the network voltage in the running process; because electric traction is generally high-voltage electric power, workers can not directly contact to detect the electric traction, remote control testing is often required, the special working conditions are designed, simulated and reproduced in the prior period, the high-voltage 25KV power supply technology, the high-voltage switch technology, the program control technology, the relay protection technology, the passive reactor voltage reduction technology and the like are involved, how to design a set of device for carrying out omnibearing pre-detection on electric traction is realized, the simulation and reproduction of actual operation of the special working conditions of the electric traction device under the indoor environment are realized, and the problem of urgent need to solve is to check and detect the influence of some unavoidable working conditions on an electric transmission device (such as a high-speed motor train unit train, a freight electric locomotive and the like).
Disclosure of Invention
In order to solve the problem that the bow jump and the net pressure drop in the existing electric traction rail transit cannot be detected in advance, the invention provides a detection device for electric traction.
The technical scheme adopted by the invention is as follows: a detection device for electric traction, the detection main circuit of the detection device comprising: the high-voltage protection circuit comprises a high-voltage wiring terminal TB1, a high-voltage wiring terminal TB2, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a high-voltage single-phase isolated switch QS1, a high-voltage single-phase isolated switch QS2, a high-voltage single-phase isolated switch QS3, a high-voltage single-phase isolated switch QS4, a high-voltage overvoltage protector F2, a reactor L1, a reactor L2, a reactor L3, an ammeter PA 1; the detection main loop is provided with 6 lines, wherein the 6 lines are a line a, a line b, a line c, a line d, a line e and a line f respectively;
a high-voltage connecting terminal TB1 is arranged at the wire inlet end of the line a, a high-voltage connecting terminal TB2 is arranged at the wire outlet end of the line a, and a high-voltage single-phase isolating switch QS1, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q3 and a current transformer TA1 are sequentially connected between the high-voltage connecting terminal TB1 and the high-voltage connecting terminal TB2 in series;
the inlet end of the line b is connected with the outlet end of a high-voltage single-phase isolating switch QS1, the outlet end of the line b is connected with the outlet end of a high-voltage single-phase breaker Q3, and a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q4, a reactor L3, a reactor L2 and a reactor L1 are sequentially connected in series between the inlet end of the line b and the outlet end of the line b;
the inlet end of the line c is connected with the outlet end of a high-voltage single-phase circuit breaker Q1, the outlet end of the line c is connected with the outlet end of a reactor L1, a high-voltage overvoltage protector F2 and a high-voltage single-phase isolating switch QS2 are sequentially connected in series between the inlet end of the line c and the outlet end of the line c, the inlet end of the line c is electrically connected with the inlet end of the high-voltage single-phase circuit breaker Q4, and the inlet end of the high-voltage single-phase isolating switch QS2 is grounded;
the inlet end of a line d is connected with the inlet end of a reactor L1, the outlet end of the line d is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS3 is connected to the line d in series;
the inlet end of a line e is connected with the inlet end of a reactor L2, the outlet end of the line e is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS4 is connected to the line e in series;
the line f is a closed loop in which the current transformer TA1 is located, the ammeter PA1 and the current protection relay RF1 are connected in series on the line f, and the incoming line end of the current protection relay RF1 is grounded.
The timing control circuit for detecting the main loop comprises: a breaker QF1, a normally open button switch SB1, a normally closed button switch SB2, a normally open button switch SB3, a normally open button switch SB4, a normally closed button switch SB5, a transfer switch SA1, a transfer switch SA2, a transfer switch SA3, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a time relay KT1, a time relay KT2, a time relay KT3, a time relay 4, a flash warning lamp OKTL, an indicator lamp 1HL4, an indicator lamp 2HL4, an indicator lamp 2HL5, an indicator lamp 2HL6, an indicator lamp 3HL4 and a thermal relay FR 1;
the coil of time relay KT1 is KT1.1, and the normally open contact of time relay KT1 is: KT1.2 and KT 1.3; the coil of time relay KT2 is KT2.1, and the normally open contact of time relay KT2 is: KT2.2 and KT 2.3; the coil of time relay KT3 is KT3.1, and the normally closed contact of time relay KT3 is: KT 3.2;
the coil of the time relay KT4 is KT4.1, and the normally closed contact of the time relay KT4 is: KT 4.2;
the coil of the high-voltage single-phase circuit breaker Q1 is Q1.1, and the normally open switch of the high-voltage single-phase circuit breaker Q1 is as follows: q1.2;
the coil of the high-voltage single-phase circuit breaker Q2 is Q2.1, and the normally open switch of the high-voltage single-phase circuit breaker Q2 is as follows: q2.2 and Q2.3;
the coil of the high-voltage single-phase circuit breaker Q3 is Q3.1, and the normally open switch of the high-voltage single-phase circuit breaker Q3 is as follows: q3.2;
the coil of the high-voltage single-phase circuit breaker Q4 is Q4.1, and the normally open switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.2, the normally closed switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.3;
the incoming line end of the circuit breaker QF1 is connected with a control power supply, the live line output end of the circuit breaker QF1 is connected with a positive bus, the zero line output end of the circuit breaker QF1 is connected with a negative bus, 7 lines are connected in parallel between the positive bus and the negative bus, the 7 lines are respectively lines 1 to 7, the incoming line ends of the 7 lines are connected with the positive bus, and the outgoing line ends of the 7 lines are connected with the negative bus;
line 1: a flash warning lamp OHL is connected in series between the incoming line end of the line 1 and the outgoing line end of the line 1;
line 2: a normally open button switch SB1, a normally closed button switch SB2, a normally closed contact KT3.2 of a time relay KT3, a thermal relay FR1 and a coil Q1.1 of a high-voltage single-phase circuit breaker Q1 are sequentially connected in series between the wire inlet end of the line 2 and the wire outlet end of the line 2;
the incoming line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with a positive bus, the outgoing line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with the outgoing line end of a normally open button switch SB1, the incoming line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the positive bus, and the outgoing line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the outgoing line end of a normally closed contact KT;
line 3: a change-over switch SA1, a normally open button switch SB3, a normally closed contact KT4.2 of a time relay KT4 and a coil KT1.1 of the time relay KT1 are sequentially connected in series between the incoming line end of the line 3 and the outgoing line end of the line 3, the incoming line end of the normally open contact KT1.2 of the time relay KT1 is connected with the incoming line end of the normally open button switch SB3, and the outgoing line end of the normally open contact KT1.2 of the time relay KT1 is connected with the outgoing line end of the normally open button switch SB 3;
5 lines are connected in parallel between the outlet end of the change-over switch SA1 and the negative bus, and the 5 lines are respectively: line 31, line 32, line 33, line 34, and line 35;
line 31: a normally open contact KT1.3 of a time relay KT1 and a coil KT2.1 of a time relay KT2 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
the line 32: a normally open contact KT2.2 of a time relay KT2 and a coil KT3.1 of a time relay KT3 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
line 33: a normally open contact KT2.3 of a time relay KT2 and a coil Q2.1 of a high-voltage single-phase circuit breaker Q2 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
the line 34: a normally open switch Q2.3 of a high-voltage single-phase circuit breaker Q2 and a coil KT4.1 of a time relay KT4 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
line 35: an indicator lamp 1HL4 is connected in series between the outlet end of the change-over switch SA1 and the negative bus;
and a line 4: a change-over switch SA2 and a coil Q4.1 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 4 and the wire outlet end of the line 4, the wire inlet end of the indicator lamp 2HL4 is connected with the wire outlet end of the change-over switch SA2, and the wire outlet end of the indicator lamp 2HL4 is connected with a negative bus;
line 5: a normally open switch Q4.2 and an indicator lamp 2HL5 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 5 and the wire outlet end of the line 5;
and a line 6: a normally closed switch Q4.3 of a high-voltage single-phase circuit breaker Q4 and an indicator lamp 2HL6 are sequentially connected in series between the wire inlet end of the line 6 and the wire outlet end of the line 6;
a line 7: a change-over switch SA3 is sequentially connected in series between the wire inlet end of the line 7 and the wire outlet end of the line 7, a normally open button switch SB4, a coil Q3.1 of a normally closed button switch SB5 and a high-voltage single-phase circuit breaker Q3, the wire inlet end of a normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire inlet end of the normally open button switch SB4, the wire outlet end of the normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire outlet end of the normally open button switch SB4, the wire inlet end of the indicator lamp 3HL4 is connected with the wire inlet end of the normally open button switch SB4, and the wire outlet end.
In the testing method of the detection device, the test detection of the voltage transient recovery comprises the following steps:
the first step is as follows: firstly, a high-voltage single-phase isolating switch QS1 is closed, then a circuit breaker QF1 time sequence control circuit is closed to be electrified, and a flash warning lamp OHL runs to warn;
the second step is that: closing a transfer switch SA3, the detection main loop being ready to be charged;
the third step: closing a normally-open button switch SB4, closing a high-voltage single-phase circuit breaker Q3, and connecting the detection main loop part;
the fourth step: closing the transfer switch SA1 to prepare for jumping;
the fifth step: closing a normally-open button switch SB1, closing a high-voltage single-phase circuit breaker Q1, and electrifying the detection main loop;
and a sixth step: closing a normally-open button switch SB3, and starting a time relay KT 1;
the seventh step: the time relay KT1 delays to close the time relay KT2, and the time relay KT2 instantly starts the time relay KT 3;
eighth step: a normally closed contact KT3.2 of a time relay KT3 breaks a high-voltage single-phase circuit breaker Q1 in a delayed mode, and the detection main circuit stops supplying power;
the ninth step: a normally open contact KT2.3 of a time relay KT2 is used for closing a high-voltage single-phase circuit breaker Q2 in a delayed mode, and the detection main loop recovers power supply;
the tenth step: a normally open switch Q2.3 of the high-voltage single-phase circuit breaker Q2 is closed, and a time relay KT4 is started;
the eleventh step: the time relay KT4 delays and disconnects the time relay KT1, the time relay KT2 and the time relay KT 3;
the twelfth step: the time relay KT2 instantaneously opens the high-voltage single-phase circuit breaker Q2;
the thirteenth step: ready for the next cycle.
In the test method of the detection device, the test detection of the voltage dip comprises the following steps:
the first step is as follows: firstly, a high-voltage single-phase isolating switch QS1 is closed, then a breaker QF1 is closed, and the timing sequence control circuit is electrified;
the second step is that: the transfer switch SA2 is closed, and the high-voltage single-phase breaker Q4 is closed;
the third step: pressing a normally open button switch SB4 to close a high-voltage single-phase breaker Q3;
the fourth step: pressing a normally open button switch SB1, closing a high-voltage single-phase breaker Q1, and detecting the normal power supply of a main loop;
the fifth step: pressing a normally closed button switch SB5, disconnecting a high-voltage single-phase circuit breaker Q3, and connecting a detection main loop in series with a reactor for voltage reduction and power supply;
and a sixth step: pressing the normally-open button switch SB1 again, closing the high-voltage single-phase circuit breaker Q1, and supplying power to the detection main circuit normally;
the seventh step: one cycle is completed.
The high-voltage connecting terminal TB1 and the high-voltage connecting terminal TB2 are connected with 25KV high-voltage electricity, a control power supply connected with the breaker QF1 can be 220V, 380V and the like, the high-voltage single-phase isolating switch QS2 is in an off state when the main loop is detected to normally work, and when an emergency accident happens, the high-voltage single-phase isolating switch QS2 is grounded in a closed mode, so that the safety protection effect is achieved.
Compared with the prior art, the invention has the following beneficial effects.
The detection device for electric traction realizes the simulation and reappearance of the actual operation of the special working conditions of the electric traction device in an indoor environment, inspects and detects the influence of some inevitable working conditions on the electric transmission device, makes technical design and engineering verification in advance, and improves technical measures; the whole engineering efficiency is greatly improved; the manufacturing quality of the electric traction electric transmission device is improved, and the high-speed safe operation of high-speed motor train units and freight electric locomotives is ensured.
The invention realizes the application of the electric traction bow-trip and voltage dip simulation test, and thoroughly changes the original state which cannot be tested; the repeated work of design engineers is reduced, the design is pertinence, the technical test verification strength in the aspect of electric traction in China is improved, the research blank in the field is filled, the technical level of the whole electric traction electric transmission is improved, and the innovation quality of high-power electric traction design and manufacture is ensured.
Thirdly, by controlling the time interval between the breaking of the high-voltage single-phase circuit breaker Q1 and the closing of the high-voltage single-phase circuit breaker Q2, the condition of any width in one cycle of alternating current with certain frequency can be simulated, namely, the tripping time interval with certain narrowness can be simulated, the switch of the high-voltage single-phase circuit breaker Q2 is closed before the breaking of the high-voltage single-phase circuit breaker Q1 is carried out, or the switch of the high-voltage single-phase circuit breaker Q2 is closed in the breaking process of the high-voltage single-phase circuit breaker Q1, and the time is used for accurately controlling the breaking time of the high-voltage single-phase circuit.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 shows a main detection circuit of a detection device for electric traction according to the invention.
Fig. 2 is a circuit diagram of a timing control of a detection device for electric traction according to the present invention.
Fig. 3 is a flowchart illustrating the operation of the detection main circuit in embodiment 1 of the detection device for electric traction according to the present invention.
Fig. 4 is a circuit diagram of a timing control in embodiment 1 of a detection apparatus for electric traction according to the present invention.
Fig. 5 is a timing chart of the control of the jump switch in the embodiment 1 of the detecting device for electric traction according to the present invention.
Fig. 6 is a diagram showing a normal operation state of a detection main circuit in embodiment 2 of a detection apparatus for electric traction according to the present invention.
Fig. 7 is a flowchart illustrating the operation of the detection main circuit in embodiment 2 of the detection apparatus for electric traction according to the present invention.
Fig. 8 is a circuit diagram of a timing control in embodiment 2 of a detection apparatus for electric traction according to the present invention.
Detailed Description
Example 1
In a detection device for electric traction according to the present invention, a main detection loop of the detection device includes: the high-voltage protection circuit comprises a high-voltage wiring terminal TB1, a high-voltage wiring terminal TB2, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a high-voltage single-phase isolated switch QS1, a high-voltage single-phase isolated switch QS2, a high-voltage single-phase isolated switch QS3, a high-voltage single-phase isolated switch QS4, a high-voltage overvoltage protector F2, a reactor L1, a reactor L2, a reactor L3, an ammeter PA 1; the detection main loop is provided with 6 lines, wherein the 6 lines are a line a, a line b, a line c, a line d, a line e and a line f respectively;
a high-voltage connecting terminal TB1 is arranged at the wire inlet end of the line a, a high-voltage connecting terminal TB2 is arranged at the wire outlet end of the line a, and a high-voltage single-phase isolating switch QS1, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q3 and a current transformer TA1 are sequentially connected between the high-voltage connecting terminal TB1 and the high-voltage connecting terminal TB2 in series;
the inlet end of the line b is connected with the outlet end of a high-voltage single-phase isolating switch QS1, the outlet end of the line b is connected with the outlet end of a high-voltage single-phase breaker Q3, and a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q4, a reactor L3, a reactor L2 and a reactor L1 are sequentially connected in series between the inlet end of the line b and the outlet end of the line b;
the inlet end of the line c is connected with the outlet end of a high-voltage single-phase circuit breaker Q1, the outlet end of the line c is connected with the outlet end of a reactor L1, a high-voltage overvoltage protector F2 and a high-voltage single-phase isolating switch QS2 are sequentially connected in series between the inlet end of the line c and the outlet end of the line c, the inlet end of the line c is electrically connected with the inlet end of the high-voltage single-phase circuit breaker Q4, and the inlet end of the high-voltage single-phase isolating switch QS2 is grounded;
the inlet end of a line d is connected with the inlet end of a reactor L1, the outlet end of the line d is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS3 is connected to the line d in series;
the inlet end of a line e is connected with the inlet end of a reactor L2, the outlet end of the line e is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS4 is connected to the line e in series;
the line f is a closed loop in which the current transformer TA1 is located, the ammeter PA1 and the current protection relay RF1 are connected in series on the line f, and the incoming line end of the current protection relay RF1 is grounded.
The timing control circuit for detecting the main loop comprises: a breaker QF1, a normally open button switch SB1, a normally closed button switch SB2, a normally open button switch SB3, a normally open button switch SB4, a normally closed button switch SB5, a transfer switch SA1, a transfer switch SA2, a transfer switch SA3, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a time relay KT1, a time relay KT2, a time relay KT3, a time relay 4, a flash warning lamp OKTL, an indicator lamp 1HL4, an indicator lamp 2HL4, an indicator lamp 2HL5, an indicator lamp 2HL6, an indicator lamp 3HL4 and a thermal relay FR 1;
the coil of time relay KT1 is KT1.1, and the normally open contact of time relay KT1 is: KT1.2 and KT 1.3; the coil of time relay KT2 is KT2.1, and the normally open contact of time relay KT2 is: KT2.2 and KT 2.3; the coil of time relay KT3 is KT3.1, and the normally closed contact of time relay KT3 is: KT 3.2;
the coil of the time relay KT4 is KT4.1, and the normally closed contact of the time relay KT4 is: KT 4.2;
the coil of the high-voltage single-phase circuit breaker Q1 is Q1.1, and the normally open switch of the high-voltage single-phase circuit breaker Q1 is as follows: q1.2;
the coil of the high-voltage single-phase circuit breaker Q2 is Q2.1, and the normally open switch of the high-voltage single-phase circuit breaker Q2 is as follows: q2.2 and Q2.3;
the coil of the high-voltage single-phase circuit breaker Q3 is Q3.1, and the normally open switch of the high-voltage single-phase circuit breaker Q3 is as follows: q3.2;
the coil of the high-voltage single-phase circuit breaker Q4 is Q4.1, and the normally open switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.2, the normally closed switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.3;
the incoming line end of the circuit breaker QF1 is connected with a control power supply, the live line output end of the circuit breaker QF1 is connected with a positive bus, the zero line output end of the circuit breaker QF1 is connected with a negative bus, 7 lines are connected in parallel between the positive bus and the negative bus, the 7 lines are respectively lines 1 to 7, the incoming line ends of the 7 lines are connected with the positive bus, and the outgoing line ends of the 7 lines are connected with the negative bus;
line 1: a flash warning lamp OHL is connected in series between the incoming line end of the line 1 and the outgoing line end of the line 1;
line 2: a normally open button switch SB1, a normally closed button switch SB2, a normally closed contact KT3.2 of a time relay KT3, a thermal relay FR1 and a coil Q1.1 of a high-voltage single-phase circuit breaker Q1 are sequentially connected in series between the wire inlet end of the line 2 and the wire outlet end of the line 2;
the incoming line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with a positive bus, the outgoing line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with the outgoing line end of a normally open button switch SB1, the incoming line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the positive bus, and the outgoing line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the outgoing line end of a normally closed contact KT;
line 3: a change-over switch SA1, a normally open button switch SB3, a normally closed contact KT4.2 of a time relay KT4 and a coil KT1.1 of the time relay KT1 are sequentially connected in series between the incoming line end of the line 3 and the outgoing line end of the line 3, the incoming line end of the normally open contact KT1.2 of the time relay KT1 is connected with the incoming line end of the normally open button switch SB3, and the outgoing line end of the normally open contact KT1.2 of the time relay KT1 is connected with the outgoing line end of the normally open button switch SB 3;
5 lines are connected in parallel between the outlet end of the change-over switch SA1 and the negative bus, and the 5 lines are respectively: line 31, line 32, line 33, line 34, and line 35;
line 31: a normally open contact KT1.3 of a time relay KT1 and a coil KT2.1 of a time relay KT2 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
the line 32: a normally open contact KT2.2 of a time relay KT2 and a coil KT3.1 of a time relay KT3 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
line 33: a normally open contact KT2.3 of a time relay KT2 and a coil Q2.1 of a high-voltage single-phase circuit breaker Q2 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
the line 34: a normally open switch Q2.3 of a high-voltage single-phase circuit breaker Q2 and a coil KT4.1 of a time relay KT4 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
line 35: an indicator lamp 1HL4 is connected in series between the outlet end of the change-over switch SA1 and the negative bus;
and a line 4: a change-over switch SA2 and a coil Q4.1 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 4 and the wire outlet end of the line 4, the wire inlet end of the indicator lamp 2HL4 is connected with the wire outlet end of the change-over switch SA2, and the wire outlet end of the indicator lamp 2HL4 is connected with a negative bus;
line 5: a normally open switch Q4.2 and an indicator lamp 2HL5 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 5 and the wire outlet end of the line 5;
and a line 6: a normally closed switch Q4.3 of a high-voltage single-phase circuit breaker Q4 and an indicator lamp 2HL6 are sequentially connected in series between the wire inlet end of the line 6 and the wire outlet end of the line 6;
a line 7: a change-over switch SA3 is sequentially connected in series between the wire inlet end of the line 7 and the wire outlet end of the line 7, a normally open button switch SB4, a coil Q3.1 of a normally closed button switch SB5 and a high-voltage single-phase circuit breaker Q3, the wire inlet end of a normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire inlet end of the normally open button switch SB4, the wire outlet end of the normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire outlet end of the normally open button switch SB4, the wire inlet end of the indicator lamp 3HL4 is connected with the wire inlet end of the normally open button switch SB4, and the wire outlet end.
As shown in fig. 1 to 5, when the main circuit is operated, the test detection process of the voltage transient recovery.
As shown in fig. 3, when the high-voltage single-phase breaker Q1 is disconnected, the power supply is stopped, and the voltage drop disappears; closing a Q2 switch of the high-voltage single-phase circuit breaker to recover power supply, and raising the voltage normally; the time interval between the breaking of the high-voltage single-phase circuit breaker Q1 and the closing of the high-voltage single-phase circuit breaker Q2 is controlled, namely, the voltage disappears in the established time interval, namely the width of the electric pulse, and the working condition of the trip of the locomotive pantograph can be simulated;
because the high-voltage circuit breaker has an electrical constant and a mechanical inertia (mechanical constant) when the high-voltage circuit breaker is switched on and off, and the condition of any width in one cycle of 50HZ alternating current is simulated, the time of the disconnection of the high-voltage single-phase circuit breaker Q1 and the time of the closing of the high-voltage single-phase circuit breaker Q2 are accurately controlled, the switch of the high-voltage single-phase circuit breaker Q2 is closed before the disconnection of the high-voltage single-phase circuit breaker Q1 is carried out, or the switch of the high-voltage single-phase circuit breaker Q2 is.
As shown in fig. 4 and 5, the specific working process of the timing control circuit is as follows:
the first step is as follows: firstly, a high-voltage single-phase isolating switch QS1 is closed, then a circuit breaker QF1 time sequence control circuit is closed to be electrified, and a flash warning lamp OHL runs to warn;
the second step is that: closing a transfer switch SA3, the detection main loop being ready to be charged;
the third step: closing a normally-open button switch SB4, closing a high-voltage single-phase circuit breaker Q3, and connecting the detection main loop part;
the fourth step: closing the transfer switch SA1 to prepare for jumping;
the fifth step: closing a normally-open button switch SB1, closing a high-voltage single-phase circuit breaker Q1, and detecting that a main loop is electrified, namely at the T1 moment in the figure 5;
and a sixth step: closing the normally-open button switch SB3, and starting the time relay KT1, namely at the time T2 in FIG. 5;
the seventh step: the time relay KT1 delays to close the time relay KT2, and the time relay KT2 instantly starts the time relay KT3, namely at the time T3 in the figure 5;
eighth step: a normally closed contact KT3.2 of a time relay KT3 breaks a high-voltage single-phase circuit breaker Q1 in a delayed mode, and the detection main circuit stops supplying power, namely at the time of T4 in fig. 5;
the ninth step: a normally open contact KT2.3 of a time relay KT2 is used for closing a high-voltage single-phase circuit breaker Q2 in a delayed mode, and the power supply of the detection main loop is restored, namely at the time of T5 in fig. 5;
the tenth step: a normally open switch Q2.3 of the high-voltage single-phase circuit breaker Q2 is closed, and a time relay KT4 is started;
the eleventh step: the time relay KT4 delays and disconnects the time relay KT1, the time relay KT2 and the time relay KT 3;
the twelfth step: the time relay KT2 instantaneously opens the high-voltage single-phase circuit breaker Q2, namely at time T6 in fig. 5;
the thirteenth step: ready for the next cycle.
The size of the main circuit power-off interval is determined by the time delay period adjustment of the time relay KT2 and the time relay KT3.
Example 2
In a detection device for electric traction according to the present invention, a main detection loop of the detection device includes: the high-voltage protection circuit comprises a high-voltage wiring terminal TB1, a high-voltage wiring terminal TB2, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a high-voltage single-phase isolated switch QS1, a high-voltage single-phase isolated switch QS2, a high-voltage single-phase isolated switch QS3, a high-voltage single-phase isolated switch QS4, a high-voltage overvoltage protector F2, a reactor L1, a reactor L2, a reactor L3, an ammeter PA 1; the detection main loop is provided with 6 lines, wherein the 6 lines are a line a, a line b, a line c, a line d, a line e and a line f respectively;
a high-voltage connecting terminal TB1 is arranged at the wire inlet end of the line a, a high-voltage connecting terminal TB2 is arranged at the wire outlet end of the line a, and a high-voltage single-phase isolating switch QS1, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q3 and a current transformer TA1 are sequentially connected between the high-voltage connecting terminal TB1 and the high-voltage connecting terminal TB2 in series;
the inlet end of the line b is connected with the outlet end of a high-voltage single-phase isolating switch QS1, the outlet end of the line b is connected with the outlet end of a high-voltage single-phase breaker Q3, and a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q4, a reactor L3, a reactor L2 and a reactor L1 are sequentially connected in series between the inlet end of the line b and the outlet end of the line b;
the inlet end of the line c is connected with the outlet end of a high-voltage single-phase circuit breaker Q1, the outlet end of the line c is connected with the outlet end of a reactor L1, a high-voltage overvoltage protector F2 and a high-voltage single-phase isolating switch QS2 are sequentially connected in series between the inlet end of the line c and the outlet end of the line c, the inlet end of the line c is electrically connected with the inlet end of the high-voltage single-phase circuit breaker Q4, and the inlet end of the high-voltage single-phase isolating switch QS2 is grounded;
the inlet end of a line d is connected with the inlet end of a reactor L1, the outlet end of the line d is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS3 is connected to the line d in series;
the inlet end of a line e is connected with the inlet end of an L2 reactor, the outlet end of the line e is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS4 is connected to the line e in series;
the line f is a closed loop in which the current transformer TA1 is located, the ammeter PA1 and the current protection relay RF1 are connected in series on the line f, and the incoming line end of the current protection relay RF1 is grounded.
The timing control circuit for detecting the main loop comprises: a breaker QF1, a normally open button switch SB1, a normally closed button switch SB2, a normally open button switch SB3, a normally open button switch SB4, a normally closed button switch SB5, a transfer switch SA1, a transfer switch SA2, a transfer switch SA3, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a time relay KT1, a time relay KT2, a time relay KT3, a time relay 4, a flash warning lamp OKTL, an indicator lamp 1HL4, an indicator lamp 2HL4, an indicator lamp 2HL5, an indicator lamp 2HL6, an indicator lamp 3HL4 and a thermal relay FR 1;
the coil of time relay KT1 is KT1.1, and the normally open contact of time relay KT1 is: KT1.2 and KT 1.3; the coil of time relay KT2 is KT2.1, and the normally open contact of time relay KT2 is: KT2.2 and KT 2.3; the coil of time relay KT3 is KT3.1, and the normally closed contact of time relay KT3 is: KT 3.2;
the coil of the time relay KT4 is KT4.1, and the normally closed contact of the time relay KT4 is: KT 4.2;
the coil of the high-voltage single-phase circuit breaker Q1 is Q1.1, and the normally open switch of the high-voltage single-phase circuit breaker Q1 is as follows: q1.2;
the coil of the high-voltage single-phase circuit breaker Q2 is Q2.1, and the normally open switch of the high-voltage single-phase circuit breaker Q2 is as follows: q2.2 and Q2.3;
the coil of the high-voltage single-phase circuit breaker Q3 is Q3.1, and the normally open switch of the high-voltage single-phase circuit breaker Q3 is as follows: q3.2;
the coil of the high-voltage single-phase circuit breaker Q4 is Q4.1, and the normally open switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.2, the normally closed switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.3;
the incoming line end of the circuit breaker QF1 is connected with a control power supply, the live line output end of the circuit breaker QF1 is connected with a positive bus, the zero line output end of the circuit breaker QF1 is connected with a negative bus, 7 lines are connected in parallel between the positive bus and the negative bus, the 7 lines are respectively lines 1 to 7, the incoming line ends of the 7 lines are connected with the positive bus, and the outgoing line ends of the 7 lines are connected with the negative bus;
line 1: a flash warning lamp OHL is connected in series between the incoming line end of the line 1 and the outgoing line end of the line 1;
line 2: a normally open button switch SB1, a normally closed button switch SB2, a normally closed contact KT3.2 of a time relay KT3, a thermal relay FR1 and a coil Q1.1 of a high-voltage single-phase circuit breaker Q1 are sequentially connected in series between the wire inlet end of the line 2 and the wire outlet end of the line 2;
the incoming line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with a positive bus, the outgoing line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with the outgoing line end of a normally open button switch SB1, the incoming line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the positive bus, and the outgoing line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the outgoing line end of a normally closed contact KT;
line 3: a change-over switch SA1, a normally open button switch SB3, a normally closed contact KT4.2 of a time relay KT4 and a coil KT1.1 of the time relay KT1 are sequentially connected in series between the incoming line end of the line 3 and the outgoing line end of the line 3, the incoming line end of the normally open contact KT1.2 of the time relay KT1 is connected with the incoming line end of the normally open button switch SB3, and the outgoing line end of the normally open contact KT1.2 of the time relay KT1 is connected with the outgoing line end of the normally open button switch SB 3;
5 lines are connected in parallel between the outlet end of the change-over switch SA1 and the negative bus, and the 5 lines are respectively: line 31, line 32, line 33, line 34, and line 35;
line 31: a normally open contact KT1.3 of a time relay KT1 and a coil KT2.1 of a time relay KT2 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
the line 32: a normally open contact KT2.2 of a time relay KT2 and a coil KT3.1 of a time relay KT3 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
line 33: a normally open contact KT2.3 of a time relay KT2 and a coil Q2.1 of a high-voltage single-phase circuit breaker Q2 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
the line 34: a normally open switch Q2.3 of a high-voltage single-phase circuit breaker Q2 and a coil KT4.1 of a time relay KT4 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
line 35: an indicator lamp 1HL4 is connected in series between the outlet end of the change-over switch SA1 and the negative bus;
and a line 4: a change-over switch SA2 and a coil Q4.1 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 4 and the wire outlet end of the line 4, the wire inlet end of the indicator lamp 2HL4 is connected with the wire outlet end of the change-over switch SA2, and the wire outlet end of the indicator lamp 2HL4 is connected with a negative bus;
line 5: a normally open switch Q4.2 and an indicator lamp 2HL5 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 5 and the wire outlet end of the line 5;
and a line 6: a normally closed switch Q4.3 of a high-voltage single-phase circuit breaker Q4 and an indicator lamp 2HL6 are sequentially connected in series between the wire inlet end of the line 6 and the wire outlet end of the line 6;
a line 7: a change-over switch SA3 is sequentially connected in series between the wire inlet end of the line 7 and the wire outlet end of the line 7, a normally open button switch SB4, a coil Q3.1 of a normally closed button switch SB5 and a high-voltage single-phase circuit breaker Q3, the wire inlet end of a normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire inlet end of the normally open button switch SB4, the wire outlet end of the normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire outlet end of the normally open button switch SB4, the wire inlet end of the indicator lamp 3HL4 is connected with the wire inlet end of the normally open button switch SB4, and the wire outlet end.
As shown in fig. 1, 2, 6, 7 and 8, the process of testing the voltage dip when detecting the main circuit operation.
As shown in fig. 6, the normal operation of the main circuit is detected, that is, the switches of the high-voltage single-phase isolating switch QS1, the high-voltage single-phase breaker Q1, the high-voltage single-phase breaker Q3 and the high-voltage single-phase breaker Q4 are closed, so that the normal operation of the main circuit is detected.
As shown in fig. 7, when the step-down test is performed, the operation state of the main circuit is detected.
1) The switch of a high-voltage single-phase breaker Q3 is switched off, all the voltage reduction reactors (namely a reactor L1, a reactor L2 and a reactor L3) are introduced, and the main loop enters the voltage reduction operation with the maximum amplitude;
2) in a power failure state, a high-voltage single-phase isolating switch QS3 is closed, most of voltage reduction reactors (namely a reactor L2 and a reactor L3) are connected in series, and after the voltage reduction operation state is switched on, the amplitude in a main loop is reduced;
3) in a power failure state, a high-voltage single-phase isolating switch QS4 is closed, a small number of voltage reduction reactors (namely a reactor L3) are connected in series, and after the main circuit is switched on, the minimum amplitude of the main circuit is in a voltage reduction operation state;
as shown in fig. 8, the specific working process of the timing control circuit is as follows:
the first step is as follows: firstly, a high-voltage single-phase isolating switch QS1 is closed, then a breaker QF1 is closed, and the timing sequence control circuit is electrified;
the second step is that: the transfer switch SA2 is closed, and the high-voltage single-phase breaker Q4 is closed;
the third step: pressing a normally open button switch SB4 to close a high-voltage single-phase breaker Q3;
the fourth step: pressing a normally open button switch SB1, closing a high-voltage single-phase breaker Q1, and detecting the normal power supply of a main loop;
the fifth step: pressing a normally closed button switch SB5, disconnecting a high-voltage single-phase circuit breaker Q3, and connecting a detection main loop in series with a reactor for voltage reduction and power supply;
and a sixth step: pressing the normally-open button switch SB1 again, closing the high-voltage single-phase circuit breaker Q1, and supplying power to the detection main circuit normally;
the seventh step: one cycle is completed.
The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.
Claims (4)
1. A detection device for electric traction, characterized in that the detection main circuit of the detection device comprises: the high-voltage protection circuit comprises a high-voltage wiring terminal TB1, a high-voltage wiring terminal TB2, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a high-voltage single-phase isolated switch QS1, a high-voltage single-phase isolated switch QS2, a high-voltage single-phase isolated switch QS3, a high-voltage single-phase isolated switch QS4, a high-voltage overvoltage protector F2, a reactor L1, a reactor L2, a reactor L3, an ammeter PA 1; the detection main loop is provided with 6 lines, wherein the 6 lines are a line a, a line b, a line c, a line d, a line e and a line f respectively;
a high-voltage connecting terminal TB1 is arranged at the wire inlet end of the line a, a high-voltage connecting terminal TB2 is arranged at the wire outlet end of the line a, and a high-voltage single-phase isolating switch QS1, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q3 and a current transformer TA1 are sequentially connected between the high-voltage connecting terminal TB1 and the high-voltage connecting terminal TB2 in series;
the inlet end of the line b is connected with the outlet end of a high-voltage single-phase isolating switch QS1, the outlet end of the line b is connected with the outlet end of a high-voltage single-phase breaker Q3, and a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q4, a reactor L3, a reactor L2 and a reactor L1 are sequentially connected in series between the inlet end of the line b and the outlet end of the line b;
the inlet end of the line c is connected with the outlet end of a high-voltage single-phase circuit breaker Q1, the outlet end of the line c is connected with the outlet end of a reactor L1, a high-voltage overvoltage protector F2 and a high-voltage single-phase isolating switch QS2 are sequentially connected in series between the inlet end of the line c and the outlet end of the line c, the inlet end of the line c is electrically connected with the inlet end of the high-voltage single-phase circuit breaker Q4, and the inlet end of the high-voltage single-phase isolating switch QS2 is grounded;
the inlet end of a line d is connected with the inlet end of a reactor L1, the outlet end of the line d is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS3 is connected to the line d in series;
the inlet end of a line e is connected with the inlet end of a reactor L2, the outlet end of the line e is connected with the outlet end of a reactor L1, and a high-voltage single-phase isolating switch QS4 is connected to the line e in series;
the line f is a closed loop in which the current transformer TA1 is located, the ammeter PA1 and the current protection relay RF1 are connected in series on the line f, and the incoming line end of the current protection relay RF1 is grounded.
2. A detection device for electric traction according to claim 1, characterized in that: the timing control circuit for detecting the main loop comprises: a breaker QF1, a normally open button switch SB1, a normally closed button switch SB2, a normally open button switch SB3, a normally open button switch SB4, a normally closed button switch SB5, a transfer switch SA1, a transfer switch SA2, a transfer switch SA3, a high-voltage single-phase breaker Q1, a high-voltage single-phase breaker Q2, a high-voltage single-phase breaker Q3, a high-voltage single-phase breaker Q4, a time relay KT1, a time relay KT2, a time relay KT3, a time relay 4, a flash warning lamp OKTL, an indicator lamp 1HL4, an indicator lamp 2HL4, an indicator lamp 2HL5, an indicator lamp 2HL6, an indicator lamp 3HL4 and a thermal relay FR 1;
the coil of time relay KT1 is KT1.1, and the normally open contact of time relay KT1 is: KT1.2 and KT 1.3; the coil of time relay KT2 is KT2.1, and the normally open contact of time relay KT2 is: KT2.2 and KT 2.3; the coil of time relay KT3 is KT3.1, and the normally closed contact of time relay KT3 is: KT 3.2;
the coil of the time relay KT4 is KT4.1, and the normally closed contact of the time relay KT4 is: KT 4.2;
the coil of the high-voltage single-phase circuit breaker Q1 is Q1.1, and the normally open switch of the high-voltage single-phase circuit breaker Q1 is as follows: q1.2;
the coil of the high-voltage single-phase circuit breaker Q2 is Q2.1, and the normally open switch of the high-voltage single-phase circuit breaker Q2 is as follows: q2.2 and Q2.3;
the coil of the high-voltage single-phase circuit breaker Q3 is Q3.1, and the normally open switch of the high-voltage single-phase circuit breaker Q3 is as follows: q3.2;
the coil of the high-voltage single-phase circuit breaker Q4 is Q4.1, and the normally open switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.2, the normally closed switch of the high-voltage single-phase circuit breaker Q4 is as follows: q4.3;
the incoming line end of the circuit breaker QF1 is connected with a control power supply, the live line output end of the circuit breaker QF1 is connected with a positive bus, the zero line output end of the circuit breaker QF1 is connected with a negative bus, 7 lines are connected in parallel between the positive bus and the negative bus, the 7 lines are respectively lines 1 to 7, the incoming line ends of the 7 lines are connected with the positive bus, and the outgoing line ends of the 7 lines are connected with the negative bus;
line 1: a flash warning lamp OHL is connected in series between the incoming line end of the line 1 and the outgoing line end of the line 1;
line 2: a normally open button switch SB1, a normally closed button switch SB2, a normally closed contact KT3.2 of a time relay KT3, a thermal relay FR1 and a coil Q1.1 of a high-voltage single-phase circuit breaker Q1 are sequentially connected in series between the wire inlet end of the line 2 and the wire outlet end of the line 2;
the incoming line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with a positive bus, the outgoing line end of a normally open switch Q1.2 of a high-voltage single-phase circuit breaker Q1 is connected with the outgoing line end of a normally open button switch SB1, the incoming line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the positive bus, and the outgoing line end of a normally open switch Q2.2 of a high-voltage single-phase circuit breaker Q2 is connected with the outgoing line end of a normally closed contact KT;
line 3: a change-over switch SA1, a normally open button switch SB3, a normally closed contact KT4.2 of a time relay KT4 and a coil KT1.1 of the time relay KT1 are sequentially connected in series between the incoming line end of the line 3 and the outgoing line end of the line 3, the incoming line end of the normally open contact KT1.2 of the time relay KT1 is connected with the incoming line end of the normally open button switch SB3, and the outgoing line end of the normally open contact KT1.2 of the time relay KT1 is connected with the outgoing line end of the normally open button switch SB 3;
5 lines are connected in parallel between the outlet end of the change-over switch SA1 and the negative bus, and the 5 lines are respectively: line 31, line 32, line 33, line 34, and line 35;
line 31: a normally open contact KT1.3 of a time relay KT1 and a coil KT2.1 of a time relay KT2 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
the line 32: a normally open contact KT2.2 of a time relay KT2 and a coil KT3.1 of a time relay KT3 are sequentially connected in series between the outlet end of the change-over switch SA1 and the negative bus;
line 33: a normally open contact KT2.3 of a time relay KT2 and a coil Q2.1 of a high-voltage single-phase circuit breaker Q2 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
the line 34: a normally open switch Q2.3 of a high-voltage single-phase circuit breaker Q2 and a coil KT4.1 of a time relay KT4 are sequentially connected in series between the outlet end of the transfer switch SA1 and the negative bus;
line 35: an indicator lamp 1HL4 is connected in series between the outlet end of the change-over switch SA1 and the negative bus;
and a line 4: a change-over switch SA2 and a coil Q4.1 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 4 and the wire outlet end of the line 4, the wire inlet end of the indicator lamp 2HL4 is connected with the wire outlet end of the change-over switch SA2, and the wire outlet end of the indicator lamp 2HL4 is connected with a negative bus;
line 5: a normally open switch Q4.2 and an indicator lamp 2HL5 of a high-voltage single-phase circuit breaker Q4 are sequentially connected in series between the wire inlet end of the line 5 and the wire outlet end of the line 5;
and a line 6: a normally closed switch Q4.3 of a high-voltage single-phase circuit breaker Q4 and an indicator lamp 2HL6 are sequentially connected in series between the wire inlet end of the line 6 and the wire outlet end of the line 6;
a line 7: a change-over switch SA3 is sequentially connected in series between the wire inlet end of the line 7 and the wire outlet end of the line 7, a normally open button switch SB4, a coil Q3.1 of a normally closed button switch SB5 and a high-voltage single-phase circuit breaker Q3, the wire inlet end of a normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire inlet end of the normally open button switch SB4, the wire outlet end of the normally open switch Q3.2 of the high-voltage single-phase circuit breaker Q3 is connected with the wire outlet end of the normally open button switch SB4, the wire inlet end of the indicator lamp 3HL4 is connected with the wire inlet end of the normally open button switch SB4, and the wire outlet end.
3. The method for testing a testing device according to claim 2, wherein: the experimental detection of voltage transient recovery comprises the following steps:
the first step is as follows: firstly, a high-voltage single-phase isolating switch QS1 is closed, then a circuit breaker QF1 time sequence control circuit is closed to be electrified, and a flash warning lamp OHL runs to warn;
the second step is that: closing a transfer switch SA3, the detection main loop being ready to be charged;
the third step: closing a normally-open button switch SB4, closing a high-voltage single-phase circuit breaker Q3, and connecting the detection main loop part;
the fourth step: closing the transfer switch SA1 to prepare for jumping;
the fifth step: closing a normally-open button switch SB1, closing a high-voltage single-phase circuit breaker Q1, and electrifying the detection main loop;
and a sixth step: closing a normally-open button switch SB3, and starting a time relay KT 1;
the seventh step: the time relay KT1 delays to close the time relay KT2, and the time relay KT2 instantly starts the time relay KT 3;
eighth step: a normally closed contact KT3.2 of a time relay KT3 breaks a high-voltage single-phase circuit breaker Q1 in a delayed mode, and the detection main circuit stops supplying power;
the ninth step: a normally open contact KT2.3 of a time relay KT2 is used for closing a high-voltage single-phase circuit breaker Q2 in a delayed mode, and the detection main loop recovers power supply;
the tenth step: a normally open switch Q2.3 of the high-voltage single-phase circuit breaker Q2 is closed, and a time relay KT4 is started;
the eleventh step: the time relay KT4 delays and disconnects the time relay KT1, the time relay KT2 and the time relay KT 3;
the twelfth step: the time relay KT2 instantaneously opens the high-voltage single-phase circuit breaker Q2;
the thirteenth step: ready for the next cycle.
4. The method for testing a testing device according to claim 2, wherein: the test detection of the voltage dip comprises the following steps:
the first step is as follows: firstly, a high-voltage single-phase isolating switch QS1 is closed, then a breaker QF1 is closed, and the timing sequence control circuit is electrified;
the second step is that: the transfer switch SA2 is closed, and the high-voltage single-phase breaker Q4 is closed;
the third step: pressing a normally open button switch SB4 to close a high-voltage single-phase breaker Q3;
the fourth step: pressing a normally open button switch SB1, closing a high-voltage single-phase breaker Q1, and detecting the normal power supply of a main loop;
the fifth step: pressing a normally closed button switch SB5, disconnecting a high-voltage single-phase circuit breaker Q3, and connecting a detection main loop in series with a reactor for voltage reduction and power supply;
and a sixth step: pressing the normally-open button switch SB1 again, closing the high-voltage single-phase circuit breaker Q1, and supplying power to the detection main loop normally;
the seventh step: one cycle is completed.
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