CN107527528B - High-voltage side winding characteristic fault simulation device and simulation method of transformer - Google Patents
High-voltage side winding characteristic fault simulation device and simulation method of transformer Download PDFInfo
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- CN107527528B CN107527528B CN201710930422.2A CN201710930422A CN107527528B CN 107527528 B CN107527528 B CN 107527528B CN 201710930422 A CN201710930422 A CN 201710930422A CN 107527528 B CN107527528 B CN 107527528B
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- 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
- G09B9/00—Simulators for teaching or training purposes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a high-voltage side winding characteristic fault simulation device of a transformer and a simulation method thereof, wherein each phase winding comprises a resistor and three branch windings connected in series with the resistor, the two ends of the resistor are connected with resistor short-circuit switches, each branch winding comprises a first strand winding, a second strand winding, a third strand winding and a fourth strand winding which are sequentially connected in series, the starting end and the terminal end of the first strand winding are connected with winding short-circuit switches, a circuit breaker is connected between the first strand winding and the second strand winding, a common branch line is led out between the second strand winding and the third strand winding of each branch winding and is connected to a tap switch, a common branch line is led out between the third strand winding and the fourth strand winding of each branch winding and is connected to the tap switch, and a tap switch is connected to the first tap switch after the tail end of each branch winding is combined, and each tap switch is connected to the neutral line N. According to the invention, the high-voltage side winding characteristic fault simulation is realized through operating the switch.
Description
Technical Field
The invention belongs to the technical field of transformer winding fault simulation, and particularly relates to a high-voltage side winding characteristic fault simulation device and a simulation method of a transformer.
Background
Because the space of the indoor training field is limited, if a large-sized transformer is configured in the simulation device, the cost is high, the occupied space is large, the structure is complex, and the simulation effect is poor.
Disclosure of Invention
The invention solves the technical problems that: the high-voltage side winding characteristic fault simulation device and the simulation method thereof for the transformer are simple in structure, low in cost, small in occupied space and better in simulation effect, and the problems in the prior art are solved.
The technical scheme adopted by the invention is as follows: the high-voltage side winding characteristic fault simulation device of the transformer comprises an A-phase winding, a B-phase winding, a C-phase winding and a neutral line N, wherein each phase winding comprises a resistor and three branch windings connected in series with the resistor, the two ends of the resistor are connected with resistor short-circuit switches, each branch winding comprises a first branch winding, a second branch winding, a third branch winding and a fourth branch winding which are sequentially connected in series, the starting end and the terminal end of the first branch winding are connected with the winding short-circuit switches, a circuit breaker is connected between the first branch winding and the second branch winding, a common branch line is led out between the second branch winding and the third branch winding of each branch winding and is connected with the tap switch in three ways, a common branch line is led out between the third branch winding and the fourth branch winding of each branch winding and is connected with the tap switch in two ways, and the tail end of each branch winding is connected with the tap switch in one way, and the outlet end of each tap switch is connected with the neutral line N.
The resistors on the A-phase winding, the B-phase winding and the C-phase winding are respectively a resistor RA, a resistor RB and a resistor RC, and the resistor short-circuit switches connected with the two ends of the resistor RA, the resistor RB and the resistor RC are respectively a switch 1S, a switch 2S and a switch 3S.
The winding short-circuit switches connected with the first winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 4S, a switch 5S, a switch 6S, a switch 7S, a switch 8S, a switch 9S, a switch 10S, a switch 11S and a switch 12S.
The circuit breakers of the nine branch windings of the a-phase winding, the B-phase winding and the C-phase winding are respectively a switch 13S, a switch 14S, a switch 15S, a switch 16S, a switch 17S, a switch 18S, a switch 19S, a switch 20S and a switch 21S.
The tapping switches connected in a common tapping line three way among the second strand winding and the third strand winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 24S, a switch 27S and a switch 30S; the tapping switches connected in a common tapping line two between the third strand winding and the fourth strand winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 23S, a switch 26S and a switch 29S; the tapping switches of tapping lines-connection after the tail ends of the fourth strand of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 22S, a switch 25S and a switch 28S.
The resistor short-circuit switch, the winding short-circuit switch, the break switch and the tapping switch of each branch winding of each phase winding are all low-voltage open or button switches.
The simulation method of the high-voltage side winding characteristic fault simulation device of the transformer comprises the following steps: 1) Simulation of the transformer in a normal fault-free state: the switching states in the high-side winding loop are: switch 1S, switch 2S and switch 3S are closed, resistor RA, resistor RB and resistor RC are all shorted, 4S, switch 5S, switch 6S, switch 7S, switch 8S, switch 9S, switch 10S, switch 11S and switch 12S are all open, switch 13S, switch 14S, switch 15S, switch 16S, switch 17S, switch 18S, switch 19S, switch 20S and switch 21S are all closed; 2) Fault state simulation of poor contact of high-voltage winding conductive loop: the transformer in a normal simulation state is provided with a switch 1S, a switch 2S and a switch 3S which are disconnected; 3) First strand winding short-circuit fault simulation of each branch winding of each phase high-voltage winding: the transformer in the normal simulation state is provided with a switch 4S, a switch 5S, a switch 6S, a switch 7S, a switch 8S, a switch 9S, a switch 10S, a switch 11S and a switch 12S which are all closed; 4) Fault simulation of high-voltage winding strand breakage and winding open circuit: the transformer in the normal simulation state turns off the switch 13S, the switch 14S, the switch 15S, the switch 16S, the switch 17S, the switch 18S, the switch 19S, the switch 20S and the switch 21S; 5) Fault simulation of tap switch gear shift: the transformer in the normal simulation state is opened or closed by operating the switch 24S, the switch 27S, the switch 30S corresponding to the first tap line or the switch 23S, the switch 26S, the switch 29S corresponding to the second tap line, and the switch 22S, the switch 25S, and the switch 28S corresponding to the third tap line.
The resistances of the resistor RA, the resistor RB and the resistor RC are 10-20% of the total resistance of the three windings of each phase when the windings are wound in parallel.
The above switch 4S, switch 5S, switch 6S, switch 7S, switch 8S, switch 9S, switch 10S, switch 11S and switch 12S are respectively connected in parallel with 9 first windings, the resistance of the first windings is 10-25% of the total resistance of each single full winding, namely 10-25% of the total resistance of each branch winding, and corresponding three taps are extracted according to 10%, 15% and 25%, one tap is connected to the winding, and the remaining two taps are used for standby.
The high-voltage side winding of the simulation device is set as a three-gear adjustable tapping switch, and the rated voltage ratio of high voltage/low voltage of the simulation device is set as 10kV:0.4kV; when the tap changer of the high-voltage side winding is at a tap line one position, the transformation ratio of the high voltage to the low voltage of the transformer is as follows: 26.25; when the tapping switch is positioned at the tapping line two position, the transformation ratio of high voltage/low voltage of the transformer is as follows: 25, a step of selecting a specific type of material; when the tapping switch is positioned at three tapping positions, the transformation ratio of high voltage to low voltage of the transformer is as follows: 23.75.
the invention has the beneficial effects that: compared with the prior art, the simulation device has the advantages that the simulation device is simple in structure, low in cost, small in occupied space and better in simulation effect, different types of faults can be simulated, a training person can analyze and diagnose faults of the transformer according to tested data, accurately analyze and judge faults of equipment, timely provide an overhaul strategy, avoid equipment to run with diseases, reduce the risk of power grid equipment and improve training effect by controlling the resistor short-circuit switch, the winding short-circuit switch, the short-circuit switch and the tapping switch to realize the fault state simulation of the transformer in normal fault-free state, the fault state simulation of the high-voltage winding conductive loop poor contact, the fault simulation of the first strand winding of each branch winding of each phase high-voltage winding, the fault simulation of the high-voltage winding broken strand (each phase can be provided with 1 strand and 2 strands of broken) and the fault simulation of the tap switch gear dislocation of the winding open circuit (when each phase winding is provided with 3 strands of broken).
Drawings
FIG. 1 is a schematic diagram of a circuit connection structure of the present invention;
FIG. 2 is a schematic diagram of a circuit connection structure where split wires are connected;
FIG. 3 is a schematic diagram of a circuit connection structure connecting two split lines;
fig. 4 is a schematic diagram of a circuit connection structure connecting three parts of the split lines.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
Example 1: as shown in fig. 1-4, a high-voltage side winding characteristic fault simulation device of a transformer comprises an a-phase winding, a B-phase winding, a C-phase winding and a neutral line N, wherein each phase winding comprises a resistor and three branch windings connected in series with the resistor, the two ends of the resistor are connected with resistor short-circuit switches, each branch winding comprises a first strand winding, a second strand winding, a third strand winding and a fourth strand winding which are sequentially connected in series, the starting end and the terminal end of the first strand winding are connected with winding short-circuit switches, a circuit breaker is connected between the first strand winding and the second strand winding, a common branch line three is led out between the second strand winding and the third strand winding of each branch winding and is connected to the tap switch, a common branch line two is led out between the third strand winding and the fourth strand winding of each branch winding and is connected to the tap switch, a tap switch is connected to the tail end of each branch winding after combination, and a tap switch outlet end is connected to the neutral line N.
The resistors on the A-phase winding, the B-phase winding and the C-phase winding are respectively a resistor RA, a resistor RB and a resistor RC, and the resistor short-circuit switches connected with the two ends of the resistor RA, the resistor RB and the resistor RC are respectively a switch 1S, a switch 2S and a switch 3S.
The winding short-circuit switches connected with the first winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 4S, a switch 5S, a switch 6S, a switch 7S, a switch 8S, a switch 9S, a switch 10S, a switch 11S and a switch 12S.
The circuit breakers of the nine branch windings of the a-phase winding, the B-phase winding and the C-phase winding are respectively a switch 13S, a switch 14S, a switch 15S, a switch 16S, a switch 17S, a switch 18S, a switch 19S, a switch 20S and a switch 21S.
The tapping switches connected in a common tapping line three way among the second strand winding and the third strand winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 24S, a switch 27S and a switch 30S; the tapping switches connected in a common tapping line two between the third strand winding and the fourth strand winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 23S, a switch 26S and a switch 29S; the tapping switches of tapping lines-connection after the tail ends of the fourth strand of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 22S, a switch 25S and a switch 28S.
The resistor short-circuit switch, the winding short-circuit switch, the break switch and the tapping switch of each branch winding of each phase winding are all low-voltage open or button switches.
The switch used for the fault setting is provided with a light display and is arranged on the inner side of a box door of the fault setting box on the left side of the transformer.
The simulation method of the high-voltage side winding characteristic fault simulation device of the transformer comprises the following steps: 1) Simulation of the transformer in a normal fault-free state: the switching states in the high-side winding loop are: switch 1S, switch 2S and switch 3S are closed, resistor RA, resistor RB and resistor RC are all shorted, switch 4S, switch 5S, switch 6S, switch 7S, switch 8S, switch 9S, switch 10S, switch 11S and switch 12S are all open, switch 13S, switch 14S, switch 15S, switch 16S, switch 17S, switch 18S, switch 19S, switch 20S and switch 21S are all closed; 2) Fault state simulation of poor contact of high-voltage winding conductive loop: the transformer in a normal simulation state is provided with a switch 1S, a switch 2S and a switch 3S which are disconnected; 3) First strand winding short-circuit fault simulation of each branch winding of each phase high-voltage winding: the transformer in the normal simulation state is provided with a switch 4S, a switch 5S, a switch 6S, a switch 7S, a switch 8S, a switch 9S, a switch 10S, a switch 11S and a switch 12S which are all closed; 4) Fault simulation of high-voltage winding strand breakage and winding open circuit: the transformer in the normal simulation state turns off the switch 13S, the switch 14S, the switch 15S, the switch 16S, the switch 17S, the switch 18S, the switch 19S, the switch 20S and the switch 21S; 5) Fault simulation of tap switch gear shift: the transformer in the normal simulation state is opened or closed by operating the switch 24S, the switch 27S, the switch 30S corresponding to the first tap line or the switch 23S, the switch 26S, the switch 29S corresponding to the second tap line, and the switch 22S, the switch 25S, and the switch 28S corresponding to the third tap line.
The resistances of the resistor RA, the resistor RB and the resistor RC are 10-20% of the total resistance of the three windings of each phase when the windings are wound in parallel.
The switch 4S, the switch 5S, the switch 6S, the switch 7S, the switch 8S, the switch 9S, the switch 10S, the switch 11S and the switch 12S are respectively connected with 9 first windings in parallel, the resistance of the first windings is 10-25% of the total resistance of each single full winding, namely 10-25% of the total resistance of each branch winding, three corresponding taps are extracted according to 10%, 15% and 25%, one tap is connected with the windings, the other two taps are used for standby, and the automatic connection can be conveniently carried out according to training requirements in future.
The high-voltage side winding of the simulation transformer is set as a three-gear adjustable tapping switch, the (22S-30S) switch (low-voltage open or button switch) of the three-gear adjustable tapping switch is arranged on the inner side of the right side box door of the transformer, and the rated voltage ratio of high voltage/low voltage of the simulation device is set as 10kV:0.4kV; when the tap changer of the high-voltage side winding is at a tap line one position, the transformation ratio of the high voltage to the low voltage of the transformer is as follows: 26.25; when the tapping switch is positioned at the tapping line two position, the transformation ratio of high voltage/low voltage of the transformer is as follows: 25, a step of selecting a specific type of material; when the tapping switch is positioned at three tapping positions, the transformation ratio of high voltage to low voltage of the transformer is as follows: 23.75.
when the tap changer of the high side winding is in the tap one position, the switches 22S, 25S, 28S are closed and the switches 23S, 24S, 26S, 27S, 29S, 30S are open as shown in fig. 2.
When the tap changer of the high side winding is in the tap line two position, the switches 23S, 26S, 29S are closed and the switches 22S, 24S, 25S, 27S, 28S, 30S are open as shown in fig. 3.
When the tap changer of the high side winding is in the tap three position, the switches 24S, 27S, 30S are closed and the switches 22S, 23S, 25S, 26S, 28S, 29S are open as shown in fig. 4.
High-voltage side winding characteristic fault setting description:
the winding of the transformer is formed by winding a plurality of windings in parallel, the high-voltage side winding of the simulation transformer is also simulated by simulating the actual transformer, and the three-winding parallel winding mode is adopted, and the phase A in the above figure is taken as an example as follows:
the operation switches 1S-3S are disconnected, so that a fault mode of poor contact of a high-voltage winding conductive loop can be set;
description: the resistor RA is connected in series in the three-strand parallel winding loops of the A phase, when the transformer is normal, the RA does not exist, and only when the connection part in the loop is in poor contact, the additional resistor RA is generated in the A phase winding loop, so that the condition of poor contact in the loop is indicated, if the contact is good, only a 1S switch connected at two ends of the resistor RA in parallel is needed to be closed, the resistor RA is short-circuited, and the resistor RA is zero at the moment, so that the A phase winding loop is good in contact. (the remaining phase windings are identical)
The three fault modes of 1 strand, 2 strands and 3 strands of turn-to-turn short circuits of the high-voltage winding can be set by closing the operation switches 4S-12S;
description: and 4S is connected at two ends of a partial winding in the single-strand winding in the phase A in parallel, when the 4S is disconnected, the winding is normal, and when the 4S is closed, the partial winding connected in parallel does not exist, namely the partial winding has the turn-to-turn short circuit condition. (the remaining phase windings are identical)
The high-voltage winding is disconnected by operating the switches 13S-21S, and the high-voltage winding can be set to be disconnected (each phase can be provided with two modes of disconnection 1 strand and disconnection 2 strands), and the winding is opened (the winding is opened when each phase winding is provided with disconnection 3 strands);
description: the 13S switch in the single-strand winding in the A phase is connected in series in the loop of the single-strand winding. When 13S is closed, this indicates that the winding is normal, and when 4S is opened, this indicates that the loop of the single-stranded winding in the a phase is opened, that is, the single-stranded winding in the a phase is open. (the remaining phase windings are identical)
The fault mode of the tap switch gear dislocation can be set through the positions of the operations 22S-30S;
description: when the transformer tap changer is normal, the tap changer of the high-side winding is in the "tap 1" (tap line one) position. 22S, 25S, 28S are closed, 23S, 24S, 26S, 27S, 29S, 30S are open. When the tap changer of the high side winding is in the "tap 2" (tap two) position. 23S, 26S, 29S are closed, 22S, 24S, 25S, 27S, 28S, 30S are open. When the tap changer of the high side winding is in the "tap 3" (tap three) position. 24S, 27S, 30S are closed, 22S, 23S, 25S, 26S, 28S, 29S are open. That is, when the transformer tap switch is normal, the tap positions and the corresponding switches are always in one-to-one correspondence, and when the transformer tap switch is not in correspondence, the situation that the tap switch is misplaced, that is, the wrong gear occurs is indicated. For example: in the "tap 1" (tap line one) position, normally 22S, 25S, 28S should be closed, 23S, 24S, 26S, 27S, 29S, 30S should be open. If 23S, 25S, 28S is closed, 22S, 24S, 26S, 27S, 29S, 30S is open. A shift between "tap 1" (tap line one) and "tap 2" (tap line two) of the a-phase tap changer occurs. (the remaining phase windings are identical)
The above description is only an example of the embodiment of the present invention, and the scope of the present invention is not limited thereto. Variations and alternatives can be readily ascertained by one skilled in the art within the scope of the present disclosure, which is intended to be within the scope of the present disclosure. For this purpose, the scope of the invention shall be subject to the scope of the claims.
Claims (8)
1. A high-voltage side winding characteristic fault simulation device of a transformer is characterized in that: the three-phase winding circuit comprises an A-phase winding, a B-phase winding, a C-phase winding and a neutral line N, wherein each phase winding comprises a resistor and three branch windings connected in series with the resistor in parallel, the two ends of the resistor are connected with a resistor short-circuit switch, each branch winding comprises a first strand winding, a second strand winding, a third strand winding and a fourth strand winding which are sequentially connected in series, a winding short-circuit switch is connected between the starting end and the terminal end of the first strand winding, a circuit breaker is connected between the first strand winding and the second strand winding, a common branch line three is led out between the second strand winding and the third strand winding of each branch winding and is connected to a tap switch, a common branch line two is led out between the third strand winding and the fourth strand winding of each branch winding and is connected to the tap switch, a tap switch after the tail ends of each branch winding are combined is connected with the tap switch, and an outlet end of each tap switch is connected to the neutral line N; the resistors on the phase A winding, the phase B winding and the phase C winding are respectively a resistor RA, a resistor RB and a resistor RC, and the resistor short-circuit switches connected with the two ends of the resistor RA, the resistor RB and the resistor RC are respectively a switch 1S, a switch 2S and a switch 3S; the winding short-circuit switches connected with the first winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 4S, a switch 5S, a switch 6S, a switch 7S, a switch 8S, a switch 9S, a switch 10S, a switch 11S and a switch 12S.
2. The high-voltage side winding characteristic fault simulation device of a transformer according to claim 1, wherein: the circuit breakers of the nine branch windings of the a-phase winding, the B-phase winding and the C-phase winding are a switch 13S, a switch 14S, a switch 15S, a switch 16S, a switch 17S, a switch 18S, a switch 19S, a switch 20S and a switch 21S, respectively.
3. The high-voltage side winding characteristic fault simulation device of a transformer according to claim 1, wherein: the tap switches which are connected in a common tap line three way among the second strand winding and the third strand winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 24S, a switch 27S and a switch 30S; the tapping switches connected in a common tapping line two between the third strand winding and the fourth strand winding of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 23S, a switch 26S and a switch 29S; the tapping switches of tapping lines-connection after the tail ends of the fourth strand of the nine branch windings of the A-phase winding, the B-phase winding and the C-phase winding are respectively a switch 22S, a switch 25S and a switch 28S.
4. The high-voltage side winding characteristic fault simulation device of a transformer according to claim 1, wherein: the resistance short-circuit switch, the winding short-circuit switch, the disconnection switch and the tapping switch of each branch winding of each phase winding are all low-voltage open or button switches.
5. A simulation method of a high-voltage side winding characteristic fault simulation device of a transformer according to any one of claims 1 to 4, characterized in that: the method comprises the following steps: 1) Simulation of the transformer in a normal fault-free state: the switching states in the high-side winding loop are: switch 1S, switch 2S and switch 3S are closed, resistor RA, resistor RB and resistor RC are all shorted, switch 4S, switch 5S, switch 6S, switch 7S, switch 8S, switch 9S, switch 10S, switch 11S and switch 12S are all open, switch 13S, switch 14S, switch 15S, switch 16S, switch 17S, switch 18S, switch 19S, switch 20S and switch 21S are all closed; 2) Fault state simulation of poor contact of high-voltage winding conductive loop: the transformer in a normal simulation state is provided with a switch 1S, a switch 2S and a switch 3S which are disconnected; 3) First strand winding short-circuit fault simulation of each branch winding of each phase high-voltage winding: the transformer in the normal simulation state is provided with a switch 4S, a switch 5S, a switch 6S, a switch 7S, a switch 8S, a switch 9S, a switch 10S, a switch 11S and a switch 12S which are all closed; 4) Fault simulation of high-voltage winding strand breakage and winding open circuit: the transformer in the normal simulation state turns off the switch 13S, the switch 14S, the switch 15S, the switch 16S, the switch 17S, the switch 18S, the switch 19S, the switch 20S and the switch 21S; 5) Fault simulation of tap switch gear shift: the transformer in the normal simulation state is opened or closed by operating the switch 24S, the switch 27S, the switch 30S corresponding to the first tap line or the switch 23S, the switch 26S, the switch 29S corresponding to the second tap line, and the switch 22S, the switch 25S, and the switch 28S corresponding to the third tap line.
6. The simulation method of the high-voltage side winding characteristic fault simulation device of the transformer according to claim 5, wherein the simulation method comprises the following steps: the resistances of the resistor RA, the resistor RB and the resistor RC are 10-20% of the total resistance of the three windings of each phase when the windings are wound in parallel.
7. The simulation method of the high-voltage side winding characteristic fault simulation device of the transformer according to claim 5, wherein the simulation method comprises the following steps: 9 first-strand windings which are respectively connected in parallel are arranged in the switch 4S, the switch 5S, the switch 6S, the switch 7S, the switch 8S, the switch 9S, the switch 10S, the switch 11S and the switch 12S, the resistance of the first-strand windings is 10-25% of the total resistance of the whole windings of each single strand, namely 10-25% of the total resistance of each branch winding, and three corresponding taps are extracted according to 10%, 15% and 25%, one tap is connected into the windings, and the remaining two taps are used for standby.
8. The simulation method of the high-voltage side winding characteristic fault simulation device of the transformer according to claim 7, wherein the simulation method comprises the following steps: the high-voltage side winding of the simulation device is set as a three-gear adjustable tapping switch, and the rated voltage ratio of high voltage/low voltage of the simulation device is set as 10kV:0.4kV; when the tap changer of the high-voltage side winding is at a tap line one position, the transformation ratio of the high voltage to the low voltage of the transformer is as follows: 26.25; when the tapping switch is positioned at the tapping line two position, the transformation ratio of high voltage/low voltage of the transformer is as follows: 25, a step of selecting a specific type of material; when the tapping switch is positioned at three tapping positions, the transformation ratio of high voltage to low voltage of the transformer is as follows: 23.75.
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| CN205665345U (en) * | 2016-06-08 | 2016-10-26 | 广州普用电气科技有限公司 | Phase to earth fault emulation testing system |
| CN107037313A (en) * | 2016-11-28 | 2017-08-11 | 国家电网公司 | The method for setting up deformation of transformer winding failure and frequency sweep impedance characteristic corresponding relation |
| CN207780992U (en) * | 2017-10-09 | 2018-08-28 | 贵州电网有限责任公司 | A kind of high-pressure side winding characteristic failures simulator of transformer |
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| CN103943010A (en) * | 2014-04-17 | 2014-07-23 | 国家电网公司 | Fault simulation transformer |
| CN104732847A (en) * | 2015-01-14 | 2015-06-24 | 广东电网有限责任公司电力科学研究院 | Electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform |
| CN204758750U (en) * | 2015-05-29 | 2015-11-11 | 国家电网公司 | Anti short circuit ability dynamic evaluation simulation model device of current transformer |
| CN105182099A (en) * | 2015-06-17 | 2015-12-23 | 国家电网公司 | Transformer winding deformation degree and fault diagnosis method based on frequency response analysis method |
| CN105761569A (en) * | 2016-04-25 | 2016-07-13 | 贵州电网有限责任公司培训与评价中心 | 10Kv distribution transformer simulation system |
| CN205665345U (en) * | 2016-06-08 | 2016-10-26 | 广州普用电气科技有限公司 | Phase to earth fault emulation testing system |
| CN107037313A (en) * | 2016-11-28 | 2017-08-11 | 国家电网公司 | The method for setting up deformation of transformer winding failure and frequency sweep impedance characteristic corresponding relation |
| CN207780992U (en) * | 2017-10-09 | 2018-08-28 | 贵州电网有限责任公司 | A kind of high-pressure side winding characteristic failures simulator of transformer |
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