CN212933818U - Power distribution automation practical training site fault simulation device - Google Patents
Power distribution automation practical training site fault simulation device Download PDFInfo
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- CN212933818U CN212933818U CN202021067868.0U CN202021067868U CN212933818U CN 212933818 U CN212933818 U CN 212933818U CN 202021067868 U CN202021067868 U CN 202021067868U CN 212933818 U CN212933818 U CN 212933818U
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Abstract
The utility model discloses a real site fault simulation device that instructs of distribution automation, the device includes: the device comprises a current-limiting resistor box, a high-voltage switch cabinet, an automatic switch and a fault simulation box; the current-limiting resistance box is connected with the high-voltage switch cabinet through a wire, the high-voltage switch cabinet is connected with the automatic switch through a wire, the fault simulation box is connected to the wire, and the console is connected with the fault simulation box and the automatic switch through secondary cables. The utility model provides a real site fault simulation analogue means of instructing of distribution automation has the effect unanimous with the scene reality, and the wiring is simple, safe, and practical.
Description
Technical Field
The utility model relates to a technical field of electric power system emulation especially relates to a real site fault simulation device that instructs of distribution automation.
Background
The simulation of the power system is a key means for researching the characteristics of the power system and obtaining fault characteristic quantities, and is also an important means for training power grid workers, especially the power distribution automation is applied in large quantities in various regions, and the power grid workers at the basic level need to perform various kinds of learning with a training site close to the site. The conventional distribution automation practical training base is simulated by applying voltage and current magnitude on a control secondary loop, namely a scheme of secondary addition has certain distortion compared with the field, namely the conventional distribution automation practical training base is learned and trained and cannot be directly applied to real daily operation and maintenance, and the scheme of secondary addition generally has complicated secondary loop wiring and higher difficulty in later maintenance of the distribution automation practical training base; in addition, if the simulation is performed directly with a voltage level of 10kV, there is a great risk and a great impact is easily caused on the upper power supply line. Therefore, a simulation device for simulating a fault, which is consistent with the actual field, safe and simple in wiring, is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the not enough of prior art, the utility model provides a real ground trouble analogue means of instructing of distribution automation, the wiring is simple, safe, and practical.
In order to solve the problem, the utility model provides a real place trouble analogue means that instructs of distribution automation, the device includes: the device comprises a current-limiting voltage box, a high-voltage switch cabinet, an automatic switch and a fault simulation box; the current-limiting voltage box is connected with the high-voltage switch cabinet, the high-voltage switch cabinet is connected with the automatic switch, the high-voltage switch cabinet is further connected with the fault simulation box, the fault simulation box is connected with the automatic switch, and the connection is carried out on the basis of a connecting wire.
In an optional embodiment, the fault simulation box includes a housing, and an incoming line connection terminal, a short-circuit fault simulation loop, a ground fault simulation loop, and an outgoing line connection terminal, which are disposed inside the housing; the incoming line wiring terminal is connected with one end of the short-circuit fault simulation loop or one end of the ground fault simulation loop, and the outgoing line wiring terminal is connected with the other end of the short-circuit fault simulation loop or the other end of the ground fault simulation loop.
In an alternative embodiment, the incoming wire terminal comprises: a live wire connecting terminal, a zero line connecting terminal and a zero sequence voltage connecting terminal; the live wire wiring terminal is connected with a simulated aerial or cable line live wire, the zero line wiring terminal is connected with a simulated aerial or cable line zero line, and the zero sequence voltage wiring terminal is connected with the ground fault simulation loop and is connected with the simulated aerial or cable line in a suspension manner.
In an optional embodiment, the short-circuit fault simulation circuit includes a short-circuit current-limiting resistor and a first contactor normally-open contact connected in series with the short-circuit current-limiting resistor; the first contactor normally-open electric shock is controlled to be disconnected or closed by a remote control console, and the short-circuit fault simulation loop is connected between the live wire connecting terminal and the zero line connecting terminal through a conductor.
In an optional embodiment, the ground fault simulation loop comprises a voltage division circuit of two resistors connected in series, and a normally open contact of a second contactor connected in series with the voltage division circuit; the ground fault simulation loop is connected between the live wire connecting terminal and the ground terminal.
In an alternative embodiment, the zero sequence voltage terminal includes two terminals, one of the terminals is connected to the voltage dividing circuit in the ground fault simulation circuit through a conductor, and the other terminal is connected to the ground terminal in the ground fault simulation circuit through a conductor.
In an optional embodiment, the outgoing line terminal includes: the zero-sequence voltage ground output terminal is connected with the live wire output terminal; the live wire output terminal and the zero line output terminal are led out through conductors or led out through two sides of the short-circuit fault simulation loop.
In an alternative embodiment, the housing is made of one of metal or plastic.
In an optional embodiment, the current-limiting resistor box includes one of a current-limiting resistor, a current-limiting capacitor, or a current-limiting inductor; the current-limiting resistor, the current-limiting capacitor or the current-limiting inductor are connected in series in the loop and are arranged on the side of the live wire connecting terminal.
In an optional implementation mode, a wire inlet switch of the high-voltage switch cabinet is connected to a zero line and a live line, and one phase is suspended; and the outgoing line of the high-voltage switch cabinet is connected with the live wire connecting terminal, the zero line connecting terminal and the zero sequence voltage connecting terminal.
In the implementation of the utility model, the power distribution automation practical training site fault simulation device can safely and controllably realize the simulation of short-circuit fault and ground fault, and achieve the effect of simulating different fault transition resistances by controlling and adjusting the current limiting resistance box; this real ground fault simulation analogue means of instructing of distribution automation has simplified the secondary circuit wiring to 220V voltage is as the power, makes things convenient for power supply control circuit's debugging and maintenance, has certain practicality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural composition diagram of a power distribution automation practical training site fault simulation device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific structure of a power distribution automation practical training site fault simulation device according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of the fault simulation box according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Example one
Please refer to fig. 1, fig. 1 is a schematic structural component diagram of a power distribution automation practical training site fault simulation apparatus according to an embodiment of the present invention.
As shown in fig. 1, a power distribution automation practical training site fault simulation device includes: a current-limiting voltage box 16, a high-voltage switch cabinet 19, an automation switch 21, a fault simulation box 20 and a control console 22; wherein, current-limiting voltage case 16 is being connected through the wire high tension switchgear 19, high tension switchgear 19 is being connected through the wire automation switch 21, high tension switchgear 19 is still being connected through the wire fault simulation case 20, fault simulation case 20 is being connected automation switch 21, the control cabinet passes through the secondary cable and is connected with fault simulation case 20 and automation switch 21. Live wire, the zero line of current-limiting resistance case outgoing line side are connected with the circuit breaker that is used for simulating in the transformer substation's switch high tension switchgear, and one of them looks unsettled does not connect, and the circuit breaker outgoing line side then goes out overhead line or cable run on the ABC three-phase connection place, and one of them wire connects the live wire, and a root connects the zero line, and a wire is used for transmitting zero sequence voltage.
Referring to fig. 3, fig. 3 is a schematic circuit structure diagram of a fault simulation box according to an embodiment of the present invention.
As shown in fig. 3, the fault simulation box includes a housing 6, and an incoming line connection terminal, a short-circuit fault simulation loop, a ground fault simulation loop, and an outgoing line connection terminal, which are disposed inside the housing 6; the incoming line wiring terminal is connected with one end of the short-circuit fault simulation loop or one end of the ground fault simulation loop, and the outgoing line wiring terminal is connected with the other end of the short-circuit fault simulation loop or the other end of the ground fault simulation loop.
The utility model discloses in the implementation process, as shown in FIG. 3, inlet wire binding post includes: a live wire connecting terminal L, a zero line connecting terminal N and a zero sequence voltage connecting terminal O; the live wire connecting terminal L is connected with a simulated aerial or cable line live wire (A phase), the zero line connecting terminal N is connected with a simulated aerial or cable line zero line (C phase), and the zero sequence voltage connecting terminal O is connected with the ground fault simulation loop and connected with a simulated aerial or cable line suspended phase (B phase).
Specifically, the live wire connecting terminal is connected with a simulated overhead or cable line live wire (phase A), the zero line connecting terminal is connected with a simulated overhead or cable line zero line (phase C), and voltage is input into the fault simulation box; the zero sequence voltage wiring terminal is connected with the ground fault simulation circuit and is connected with a simulated overhead or cable line suspension phase (B phase), and the generated simulated zero sequence voltage is output to an external B phase circuit for transmitting the zero sequence voltage.
In the specific implementation process of the present invention, as shown in fig. 3, the short-circuit fault simulation circuit includes a short-circuit current-limiting resistor R3 and a first contactor normally-open electric shock S2 connected in series with the short-circuit current-limiting resistor R3; first contactor normally open contact S2 electricity receives remote control console control disconnection or closure, short circuit fault simulation return circuit pass through the conductor connect in live wire binding post L with between the zero line binding post N.
Specifically, short-circuit fault simulation circuit pass through the conductor connect in live wire binding post with between the zero line binding post, constitute by short-circuit current-limiting resistance and first contactor normally open contact, form the short circuit through the closure of remote control console control contactor contact to reach the purpose of restriction short-circuit current size through short-circuit fault current-limiting resistance, and current-limiting resistance is used for controlling voltage between live wire and the zero line not to fall to zero when simulating short-circuit fault simultaneously, so that other switches detectable on the real standard base reach the residual voltage, ensure that residual voltage shutting normally works.
In the implementation process of the present invention, as shown in fig. 3, the ground fault simulation circuit includes a voltage dividing circuit with two resistors R1 and R2 connected in series, and a normally open contact S1 of a second contactor connected in series with the voltage dividing circuit; the ground fault simulation loop is connected between the live wire terminal L and the ground terminal 5.
The voltage divider circuit comprises two resistors connected in series, is connected with a normally open contact of a contactor in series, is connected between a live wire connecting terminal and a grounding terminal, is closed through the normally open contact of a remote control console control contactor to form a path between a live wire and a ground grid, can generate about 100V voltage between the voltage divider resistors, can adjust the voltage to be used for simulating zero sequence voltage, and can adjust the variable resistance of the high-voltage side to achieve the purpose of adjusting the size of the zero sequence voltage.
The utility model discloses in the implementation process, zero sequence voltage binding post includes two terminals, one of them terminal with in the ground fault simulation return circuit bleeder circuit is connected through the conductor, another terminal with in the ground fault simulation return circuit ground connection department is connected through the conductor for on the simulation zero sequence voltage output to the switch controller zero sequence voltage terminal that produces bleeder resistor.
The utility model discloses in the implementation process, the binding post of being qualified for the next round of competitions includes: the zero-sequence voltage ground output terminal is connected with the live wire output terminal; the live wire output terminal and the zero line output terminal are led out through conductors or two sides of the short-circuit fault simulation loop, are used for supplying power to the switch controller and are used for judging the voltage of a power supply side.
In the specific implementation process of the present invention, the housing 6 is made of one of metal and plastic. Specifically, the housing 6 of the present embodiment is made of metal.
In the specific implementation process of the present invention, as shown in fig. 2, the current-limiting resistor box 16 includes one of a current-limiting resistor R0, a current-limiting capacitor, or a current-limiting inductor; the current-limiting resistor R0, the current-limiting capacitor or the current-limiting inductor are connected in series in a loop and are arranged on the side of the live wire terminal L. It should be noted that the current-limiting resistor R0, the current-limiting capacitor, or the current-limiting inductor can be adjusted to remotely adjust the magnitude of the short-circuit current and the ground current; the current-limiting resistor R0, the current-limiting capacitor or the current-limiting inductor are connected in series into the live wire terminal L; the shell 17 of the current-limiting resistance box 16 is made of metal material to protect the current-limiting resistance R0, or the current-limiting capacitor, or the current-limiting inductor, and the current-limiting resistance box 16 is provided with an adjusting handle of the current-limiting resistance, or the current-limiting capacitor, or the current-limiting inductor for adjustment.
In the specific implementation process of the utility model, the incoming line switch of the high-voltage switch cabinet 19 is connected with the zero line and the live line, and one of the two phases is suspended; and the outgoing line of the high-voltage switch cabinet 19 is connected to the live wire connecting terminal L, the zero line connecting terminal N and the zero sequence voltage connecting terminal O.
As shown in fig. 1, the apparatus further comprises a console 22, the console 22 being connected between the automation switch 21 and the fault simulation box 20. Specifically, the control console is provided with a wiring diagram consistent with a field line, each line section on the wiring diagram of the control console panel is provided with a change-over switch, so that the functions of grounding, short circuit grounding and normal are realized respectively, the control console is connected with the fault simulation box through a secondary cable, and the change-over switch handle is used for controlling the on and off of normally open contacts of different contactors of the fault simulation box to simulate different faults.
In the implementation of the utility model, the power distribution automation practical training site fault simulation device can safely and controllably realize the simulation of short-circuit fault and ground fault, and achieve the effect of simulating different fault transition resistances by controlling and adjusting the current limiting resistance box; this real ground fault simulation analogue means of instructing of distribution automation has simplified the secondary circuit wiring to 220V voltage is as the power, makes things convenient for power supply control circuit's debugging and maintenance, has certain practicality.
Example two
As shown in fig. 3, L in the fault simulation box is a live wire terminal, N is a zero line terminal, and O is a zero sequence voltage terminal; the voltage between L and N is 220V, in order to control the magnitude of the short-circuit current and reduce the cross-sectional areas of the power distribution automation practical training site fault simulation device and the connecting wires, the short-circuit current is controlled within 100A, and the magnitude of the short-circuit current can be selectively reduced or increased according to site conditions, in this embodiment, the short-circuit current 100A and the ground current 5-20A are taken as an example for explanation.
The contactor S2 of the short-circuit fault simulation circuit selects a contactor with rated working current larger than 100A, the R3 selects a 500W power resistor with the power of 1 omega, and the power supply side current limiting resistor 18 selects the R0 to be an adjustable resistor with the power of 1.2 omega-10 omega; the grounding analog loop S1 selects a contactor with rated working current larger than 20A, R1 is an adjustable resistor which can be changed within the range of 4.8-40 omega, and R2 is a resistor with resistance value of 5 omega; the supply voltage took 220V.
As shown in fig. 2, the input side of the current-limiting resistance box is connected between a power live wire and a zero line, the output side live wire is connected with an a phase of a breaker 19 for simulating a substation outgoing line switch, a B phase is suspended, a C phase is connected with the zero line, the breaker has the functions of three-section overcurrent protection, zero sequence protection and secondary reclosing, and the output side is connected with A, B, C three-phase conductors corresponding to a circuit for simulation; the L terminal of the fault simulation box is connected with the phase A, the O terminal is connected with the phase B, and the N terminal is connected with the phase C; taking two automatic switches as an example, two fault points, namely a first fault point 1 and a second fault point 2 are arranged, the two automatic switches select a voltage time type switch, and terminals 1 to 4 of a fault simulation box are respectively connected to terminals corresponding to power supply side voltage and zero sequence voltage corresponding to a switch controller through secondary lines.
Taking the example of the fault occurring at the second fault point 2, when the ground fault simulation at the second fault point 2 needs to be performed, the transfer switch of the remote console is switched to "ground", when the transfer switch of the control fault simulation box is closed, and when R1 is 4.8 Ω, the maximum ground current is generated, and at the same time, a voltage of 100V, i.e., a simulated zero-sequence voltage is generated between the terminals 3 and 4, when R1 is increased, the voltage between the terminals 3 and 4 is synchronously reduced, and the zero-sequence voltage is reduced when the high-resistance ground is simulated; the voltage is output to a zero sequence voltage terminal of a switch controller and a B-phase conducting wire through terminals 3 and 4, zero sequence voltage detection of all switches is achieved, current forms a loop through the ground instead of flowing back through a zero line, zero sequence voltage and zero sequence current can be detected by a circuit breaker 19 and an automatic switch 21, zero sequence voltage can be detected by the automatic switch 23, the circuit breaker 19 trips according to setting action and conducts one-time reclosing, the automatic switch 21 closes after time delay X according to voltage time type switch logic, zero sequence voltage is detected immediately after closing, the switches are opened and closed in a locking mode, generation and removal of ground faults and recovery of non-fault sections are achieved, and the whole process is completely consistent with the actual process.
When short-circuit fault simulation at a second fault point 2 is needed, when a remote console change-over switch is switched to 'short-circuit', the change-over switch of a fault simulation box is controlled to be closed, when R3 is equal to 1 omega, 100A-20A short-circuit current is generated by adjusting a current limiting resistor at a power supply side to be between 1.2 omega and 10 omega, a breaker 19 simulates a transformer substation switch to act and trip, and then recloses after time delay, an automatic switch 21 closes after time delay X, and then a short circuit is generated immediately after closing, the breaker 19 simulates the transformer substation switch to act again, and trip circuit voltage is lost, the automatic switch 21 detects voltage loss in Y time, and then opens and closes, the automatic switch 23 detects instantaneous voltage, namely residual voltage, generates residual voltage closing, the circuit breaker 19 recovers circuit power supply between the automatic switch 21 after time delay, and realizes generation, removal and recovery of a non-fault section, the whole process is completely consistent with the reality.
In the implementation of the utility model, the power distribution automation practical training site fault simulation device can safely and controllably realize the simulation of short-circuit fault and ground fault, and achieve the effect of simulating different fault transition resistances by controlling and adjusting the current limiting resistance box; this real ground fault simulation analogue means of instructing of distribution automation has simplified the secondary circuit wiring to 220V voltage is as the power, makes things convenient for power supply control circuit's debugging and maintenance, has certain practicality.
The above detailed description is made on a power distribution automation practical training site fault simulation device provided by the embodiment of the present invention, and the principle and the implementation mode of the present invention are explained by using a specific embodiment, and the description of the above embodiment is only used for helping understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. The utility model provides a real site fault simulation analogue means that instructs of distribution automation, its characterized in that, the device includes: the device comprises a current-limiting resistor box, a high-voltage switch cabinet, an automatic switch, a fault simulation box and a console; the current-limiting resistance box is connected with the high-voltage switch cabinet through a wire, the high-voltage switch cabinet is connected with the automatic switch through a wire, the wire is also connected with the fault simulation box, and the console is connected with the fault simulation box and the automatic switch.
2. The power distribution automation practical training site fault simulation device according to claim 1, wherein the fault simulation box comprises a shell, and an incoming line wiring terminal, a short-circuit fault simulation loop, a ground fault simulation loop and an outgoing line wiring terminal which are arranged in the shell; the incoming line wiring terminal is connected with one end of the short-circuit fault simulation loop or one end of the ground fault simulation loop, and the outgoing line wiring terminal is connected with the other end of the short-circuit fault simulation loop or the other end of the ground fault simulation loop.
3. The power distribution automation practical training site fault simulation device according to claim 2, wherein the incoming line wiring terminal comprises: a live wire connecting terminal, a zero line connecting terminal and a zero sequence voltage connecting terminal; the live wire wiring terminal is connected with a simulated overhead line or a live wire of a cable line, the zero line wiring terminal is connected with a simulated overhead line or a zero line of the cable line, and the zero sequence voltage wiring terminal is connected with the ground fault simulation loop and is connected with the simulated overhead line or the cable line in a suspension manner.
4. The power distribution automation practical training site fault simulation device according to claim 2, wherein the short-circuit fault simulation loop comprises a short-circuit current-limiting resistor and a first contactor normally-open contact connected in series with the short-circuit current-limiting resistor; the normally open contact of the first contactor is controlled to be opened or closed by a remote control console, and the short-circuit fault simulation loop is connected between the live wire connecting terminal and the zero line connecting terminal through a conductor.
5. The power distribution automation practical training site fault simulation device according to claim 2, wherein the ground fault simulation loop comprises a voltage division circuit of two resistors connected in series, and a normally open contact of a second contactor connected in series with the voltage division circuit; the ground fault simulation loop is connected between the live wire connecting terminal and the ground terminal.
6. The power distribution automation practical training site fault simulation device according to claim 3, wherein the zero sequence voltage wiring terminal comprises two wiring terminals, one of the wiring terminals is connected with a voltage division circuit in the ground fault simulation loop through a conductor, and the other wiring terminal is connected with a ground end in the ground fault simulation loop through a conductor.
7. The power distribution automation practical training site fault simulation device according to claim 2, wherein the outgoing line wiring terminal comprises: the zero-sequence voltage ground output terminal is connected with the live wire output terminal; the live wire output terminal and the zero line output terminal are led out through conductors or led out through two sides of the short-circuit fault simulation loop.
8. The power distribution automation practical training site fault simulation device according to claim 2, wherein the housing is made of one of metal or plastic.
9. The power distribution automation practical training site fault simulation device according to claim 1, wherein the current limiting resistance box comprises one of a current limiting resistor, a current limiting capacitor or a current limiting inductor; the current-limiting resistor, the current-limiting capacitor or the current-limiting inductor are connected in series in the loop and are arranged on the side of the live wire connecting terminal.
10. The power distribution automation practical training site fault simulation device according to claim 1, wherein a lead-in switch of the high-voltage switch cabinet is connected with a zero line and a live line, and one phase is suspended; and the outgoing line of the high-voltage switch cabinet is connected with a live wire connecting terminal, a zero line connecting terminal and a zero sequence voltage connecting terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021067868.0U CN212933818U (en) | 2020-06-11 | 2020-06-11 | Power distribution automation practical training site fault simulation device |
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| CN202021067868.0U CN212933818U (en) | 2020-06-11 | 2020-06-11 | Power distribution automation practical training site fault simulation device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113990132A (en) * | 2021-07-22 | 2022-01-28 | 国家电网有限公司 | Power transformation and distribution operation and maintenance integrated practical training system and practical training method |
| CN114038264A (en) * | 2021-11-08 | 2022-02-11 | 广东电网有限责任公司 | Device for automatically generating automatic switch setting value |
| CN115019581A (en) * | 2022-06-08 | 2022-09-06 | 广东电网有限责任公司 | Distribution network automation simulation training system and method |
| CN117630740A (en) * | 2023-12-01 | 2024-03-01 | 应急管理部天津消防研究所 | Alternating current line short circuit fault simulation device and method |
| CN114038264B (en) * | 2021-11-08 | 2024-06-11 | 广东电网有限责任公司 | Automatic generate device of automatic switch definite value |
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2020
- 2020-06-11 CN CN202021067868.0U patent/CN212933818U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113990132A (en) * | 2021-07-22 | 2022-01-28 | 国家电网有限公司 | Power transformation and distribution operation and maintenance integrated practical training system and practical training method |
| CN113990132B (en) * | 2021-07-22 | 2024-04-30 | 国家电网有限公司 | Power transformation and distribution operation and maintenance integrated training system and training method |
| CN114038264A (en) * | 2021-11-08 | 2022-02-11 | 广东电网有限责任公司 | Device for automatically generating automatic switch setting value |
| CN114038264B (en) * | 2021-11-08 | 2024-06-11 | 广东电网有限责任公司 | Automatic generate device of automatic switch definite value |
| CN115019581A (en) * | 2022-06-08 | 2022-09-06 | 广东电网有限责任公司 | Distribution network automation simulation training system and method |
| CN117630740A (en) * | 2023-12-01 | 2024-03-01 | 应急管理部天津消防研究所 | Alternating current line short circuit fault simulation device and method |
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