CN111724661A - Distribution network automation simulation system and distribution network fault simulation method - Google Patents
Distribution network automation simulation system and distribution network fault simulation method Download PDFInfo
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- CN111724661A CN111724661A CN202010576324.5A CN202010576324A CN111724661A CN 111724661 A CN111724661 A CN 111724661A CN 202010576324 A CN202010576324 A CN 202010576324A CN 111724661 A CN111724661 A CN 111724661A
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Abstract
The embodiment of the invention discloses a distribution network automation simulation system and a distribution network fault simulation method. The distribution network automation simulation system comprises at least one transformer substation module and at least two cable tapping box modules, wherein the cable tapping box modules are connected in series, the output end of at least one transformer substation module is connected with a bus, and the cable tapping box modules are respectively connected with the bus; each cable distribution box module comprises a fault signal simulation unit, a terminal unit and a controllable switch; the fault signal simulation unit is used for outputting a fault signal of a set type; the terminal unit is used for acquiring input signals and output signals of the cable tapping box module, performing fault diagnosis on a simulation power distribution network segment to which the cable tapping box module belongs based on the input signals and the output signals, and outputting switch control signals when determining that faults exist in the corresponding simulation power distribution network segment; the controllable switch is connected with the terminal unit and used for responding to the switch control signal to switch the on-off state of the corresponding simulation power distribution network segment.
Description
Technical Field
The embodiment of the invention relates to the technical field of power equipment, in particular to a power distribution network automation simulation system and a power distribution network fault simulation method.
Background
With the application of the distribution network automation technology in the distribution network, the number of terminal devices is also increased sharply, and training needs to be performed for various troubleshooting and processing of the distribution network automation station devices in consideration of the current situations that the existing distribution network automation operation and maintenance personnel are insufficient in skills and small in number.
At present, use complete sets circuit breaker cabinet as training apparatus more, come various faults of simulation in order to carry out the troubleshooting training to the fortune dimension personnel. The complete set of circuit breaker cabinet is not only great in cost, but also large in size, large in occupied area of the cabinet body and high in requirement on training sites, so that the training range applicable to the complete set of circuit breaker cabinet is greatly limited by using the complete set of circuit breaker cabinet.
Disclosure of Invention
The embodiment of the invention provides a power distribution network automation simulation system and a power distribution network fault simulation method, which aim to reduce the volume of the simulation system and improve the application range of the simulation system.
In a first aspect, an embodiment of the present invention provides a distribution network automation simulation system, including at least one substation module and at least two cable distribution box modules, where each cable distribution box module is connected in series, an output end of at least one substation module is connected to a bus, and each cable distribution box module is connected to the bus; each cable distribution box module comprises a fault signal simulation unit, a terminal unit and a controllable switch;
the fault signal simulation unit is used for outputting a fault signal of a set type;
the terminal unit is used for acquiring an input signal and an output signal of the cable tapping box module, performing fault diagnosis on a simulation power distribution network segment to which the cable tapping box module belongs based on the input signal and the output signal, and outputting a switch control signal when determining that a fault exists in the simulation power distribution network segment;
the controllable switch is connected with the terminal unit and used for responding the switch control signal to switch the on-off state corresponding to the simulation power distribution network segment.
Optionally, the cable distribution box module further includes a protection mode setting unit;
the protection mode setting unit is connected with the terminal unit and is used for setting a fault detection mode of the terminal unit so as to instruct the terminal unit to carry out fault diagnosis on the corresponding simulation power distribution network segment according to the input signal and the output signal according to the set fault detection mode.
Optionally, the cable distribution box module further includes a secondary loop control unit, and the secondary loop control unit is connected to the terminal unit;
and the secondary loop control unit is used for responding to a control signal of a user and controlling the on-off of the secondary loop of the terminal unit.
Optionally, the secondary loop control unit includes a protection switching-off control switch, a protection switching-on control switch, a remote control switching-off control switch, and a remote control switching-on control switch.
Optionally, the cable distribution box module further includes a protection switching-off indicator light connected in series to the connection loop of the protection switching-off control switch, a protection switching-on indicator light connected in series to the connection loop of the protection switching-on control switch, a remote switching-off indicator light connected in series to the connection loop of the remote switching-off control switch, and a remote switching-on indicator light connected in series to the connection loop of the remote switching-on control switch.
Optionally, the input signal comprises a voltage input signal and a current input signal; the output signals include a voltage output signal and a current output signal.
Optionally, the controllable switch is an analog circuit breaker.
Optionally, the number of the transformer substation modules is two, and the two transformer substation modules are arranged at two ends of the simulation power distribution network to form a dual-power-supply power distribution ring network.
In a second aspect, an embodiment of the present invention further provides a power distribution network fault simulation method, which is applied to the power distribution network automation simulation system according to any embodiment of the present invention, where the method includes:
setting a fault signal through a fault signal simulation unit;
acquiring an input signal and an output signal of a cable tapping box module through a terminal unit, carrying out fault diagnosis on a simulation power distribution network segment to which the cable tapping box module belongs according to the input signal and the output signal by the terminal unit, and outputting a switch control signal through the terminal unit when determining that a fault exists in the corresponding simulation power distribution network segment;
and responding to the switch control signal output by the terminal unit through the controllable switch so as to switch the on-off state corresponding to the simulation power distribution network segment.
Optionally, the distribution network automation simulation system further includes a protection mode setting unit, and before the terminal unit collects the input signal and the output signal of the cable tapping box module, the method further includes:
and setting a fault detection mode of the terminal unit through the protection mode setting unit to indicate the terminal unit to perform fault diagnosis on the corresponding simulation power distribution network segment according to a set type of fault detection mode, wherein the fault detection mode at least comprises a voltage time type protection mode, a voltage current type protection mode, a conventional protection type protection mode and an intelligent distributed protection mode.
According to the distribution network automation simulation system provided by the embodiment of the invention, the transformer substation module is arranged to simulate the function of an actual transformer substation so as to supply power to a simulation distribution network; simulating a set type fault signal at a target position of the simulated power distribution network by setting a fault signal simulation unit; acquiring current and voltage signals of the simulation power distribution network by setting a terminal unit, and outputting a switch control signal when a fault signal is acquired; the controllable switch is connected with the terminal unit, and the controllable switch responds to the terminal unit to perform on-off control on the simulation power distribution network segment where the fault is located so as to realize fault isolation. Therefore, the distribution network automation simulation system provided by the embodiment of the invention can simulate a set type of fault signal, can simulate a fault action process, and can simulate wiring based on the simulation system, so that training personnel can more intuitively know the actual application of distribution network automation equipment and debugging key points of the distribution network automation equipment, thereby helping operation and maintenance personnel master a fault processing method and improving the ability of the operation and maintenance personnel for fault maintenance. Meanwhile, the distribution network automation simulation platform provided by the embodiment of the invention has the characteristics of convenience in installation, convenience in debugging, high safety, precision in measurement, high reliability and strong anti-interference performance, and does not need other capital investment except for daily maintenance. Carry out hardware simulation and fault simulation and diagnosis to the emulation distribution network through each functional module that sets up, compare in the teaching aid system of traditional use complete set circuit breaker cabinet, the size is littleer, requires lowly to the training place, therefore has better application scope.
Drawings
Fig. 1 is a block diagram illustrating a configuration of a distribution network automation simulation system according to an embodiment of the present invention;
fig. 2 is a block diagram of another distribution network automation simulation system according to an embodiment of the present invention;
fig. 3 is a block diagram of another distribution network automation simulation system according to an embodiment of the present invention;
fig. 4 is a flowchart of a power distribution network fault simulation method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of a distribution network automation simulation system according to an embodiment of the present invention, where the distribution network automation simulation system may be used in a situation where a distribution operation and maintenance worker performs fault training on site, so as to simulate various common faults through the distribution network automation simulation system, so that the distribution operation and maintenance worker can know various distribution faults and corresponding processing strategies based on the simulation system. Referring to fig. 1, the distribution network automation simulation system includes: the transformer substation comprises at least one transformer substation module 10 and at least two cable distribution box modules 20, wherein the cable distribution box modules 20 are connected in series, the output end of the at least one transformer substation module 10 is connected with a bus, and each cable distribution box module 20 is respectively connected with the bus; each cable distribution box module 20 comprises a fault signal simulation unit 210, a terminal unit 220 and a controllable switch 230;
the fault signal simulation unit 210 is configured to output a fault signal of a set type;
the terminal unit 220 is configured to collect an input signal and an output signal of the cable distribution box module 20, perform fault diagnosis on a power distribution network segment to which the cable distribution box module 20 belongs based on the input signal and the output signal, and output a switch control signal when it is determined that a fault exists in a corresponding power distribution network segment;
the controllable switch 230 is connected to the terminal unit 220, and the controllable switch 230 is configured to switch an on/off state of a corresponding power distribution network segment in response to a switch control signal.
Specifically, the substation module 10 is used to simulate an actual substation and supply power to a simulation distribution network of the simulation system.
The number of the cable distribution box modules 20 is multiple, and the multiple cable distribution box modules 20 are connected with the substation module 10 according to the actual wiring mode of the power distribution network so as to simulate the simulation power distribution network. And sets fault signals through the cable distribution box module 20 to simulate the generation of fault signals at different positions of the simulated power distribution network, so that training personnel can know different fault types and action processes corresponding to the faults.
In one embodiment, the number of the cable distribution box modules 20 is set to 9, so that the distribution automation simulation system can simulate 9 distribution network lines.
Each cable distribution box module 20 performs fault detection and fault isolation processing on the simulation power distribution network segment to which the cable distribution box module belongs. Specifically, the fault signal simulation unit 210 can simulate a common type of fault signal. Each cable distribution box is independently provided with one fault signal simulation unit 210, so that independent fault simulation can be performed at different positions of the simulated power distribution network, and different types of fault signals can be simulated at different positions of the simulated power distribution network.
The terminal unit 220 is configured to simulate an actual distribution network automation terminal, and implement a function of the distribution network automation terminal in a simulation distribution network. In this embodiment, each cable distribution box is provided with one terminal unit 220, the terminal unit 220 collects voltage and current signals of the simulated power distribution network, and performs fault diagnosis on the simulated power distribution network segment to which the terminal unit 220 belongs based on the collected voltage and current signals.
In this embodiment, the input signals of the cable distribution box collected by the terminal unit 220 include a voltage input signal and a current input signal; the collected output signals of the cable distribution box comprise voltage output signals and current output signals. Specifically, the input signal refers to a voltage signal and a current signal located on the bus side of the cable distribution box, and the output signal refers to a voltage signal and a current located on the load side of the cable distribution box. The terminal unit 220 can determine whether a fault exists in the simulated distribution network segment to which the cable distribution box belongs by analyzing the voltage signal and the current signal at the bus side and the voltage signal and the current signal at the load side.
The controllable switch 230 is connected to the primary loop of the simulated power distribution network, and is used for controlling the on-off of the simulated power distribution network segment. When the terminal unit 220 detects that the simulated power distribution network segment to which the terminal unit 220 belongs has a fault, the controllable switch 230 responds to the terminal unit 220 to disconnect the primary loop to which the terminal unit 220 belongs, so as to perform fault isolation on the simulated power distribution network segment with the fault.
It should be noted that, the distribution network automation simulation system that this embodiment provided can be dismantled because interconnecting link between each functional module, therefore training personnel can simulate the wiring process of actual distribution network as required, and carry out parameter acquisition to the emulation distribution network based on lapped interconnecting link, whether the overlap joint based on parameter analysis circuit gathered is correct, thereby realize the simulation to actual distribution network equipment debugging process, distribution network automation simulation system's function has been enriched, make distribution network automation simulation system collect functions such as equipment operation, equipment debugging, fault handling in an organic whole.
According to the distribution network automation simulation system provided by the embodiment of the invention, the transformer substation module 10 is arranged to simulate the function of an actual transformer substation so as to supply power to a simulation distribution network; simulating a set type fault signal at a target position of the simulated power distribution network by setting a fault signal simulation unit 210; collecting current and voltage signals of the simulation power distribution network by setting a terminal unit 220, and outputting a switch control signal when a fault signal is collected; by setting the controllable switch 230 to be connected with the terminal unit 220, the controllable switch 230 responds to the terminal unit 220 to perform on-off control on the simulation power distribution network segment where the fault is located, so as to realize fault isolation. Therefore, the distribution network automation simulation system provided by the embodiment of the invention can simulate a set type of fault signal, can simulate a fault action process, and can simulate wiring based on the simulation system, so that training personnel can more intuitively know the actual application of distribution network automation equipment and debugging key points of the distribution network automation equipment, thereby helping operation and maintenance personnel master a fault processing method and improving the ability of the operation and maintenance personnel for fault maintenance. Meanwhile, the distribution network automation simulation platform provided by the embodiment of the invention has the characteristics of convenience in installation, convenience in debugging, high safety, precision in measurement, high reliability and strong anti-interference performance, and does not need other capital investment except for daily maintenance. Carry out hardware simulation and fault simulation and diagnosis to the emulation distribution network through each functional module that sets up, compare in the teaching aid system of traditional use complete set circuit breaker cabinet, the size is littleer, requires lowly to the training place, therefore has better application scope.
Optionally, on the basis of the above technical solution, the terminal unit 220 is configured with a voltage transformer, a current transformer, and a display screen, and can acquire the voltage signal of the simulated power distribution network in real time through the voltage transformer, and can acquire the current signal of the simulated power distribution network in an embodiment through the current transformer, and display the current signal in real time through the display screen. For example, when the simulation system provided by the embodiment of the invention is used for debugging and simulating equipment, the configured display screen can be used for observing the voltage signal and the current signal of the simulation power distribution network in real time, so that training personnel can conveniently analyze whether the current circuit connection has problems or not based on the acquired voltage signal and current signal.
Optionally, fig. 2 is a block diagram of another distribution network automation simulation system according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 2, the cable distribution box module 20 further includes a protection mode setting unit 240;
the protection mode setting unit 240 is connected to the terminal unit 220, and the protection mode setting unit 240 is configured to set a fault detection mode of the terminal unit 220, so as to instruct the terminal unit 220 to perform fault diagnosis on the corresponding simulated power distribution network segment according to the input signal and the output signal according to the set fault detection mode.
Specifically, the protection mode setting unit 240 is correspondingly connected to the terminal unit 220, so that a user can adjust the protection mode of the terminal unit 220 through the protection mode setting unit 240, so that the terminal unit 220 simulates an operation process of performing fault diagnosis according to different fault detection modes, which is provided by an actual distribution network terminal.
In one embodiment, the fault detection mode of the terminal unit 220 may include a voltage time type protection mode, a voltage current type protection mode, a normal protection type protection mode, and an intelligent distributed protection mode, and the user switches the fault detection mode of the terminal unit 220 through the protection setting unit.
Alternatively, the protection mode setting unit 240 in this embodiment may be configured as a knob, and the user may select the fault mode to be simulated by rotating the knob.
In the embodiment, the protection mode setting unit 240 is configured in the cable distribution box module 20, and the protection mode setting unit 240 switches the fault detection mode of the terminal unit 220, so that training personnel can know the action process of switching on and off in fault diagnosis under different fault detection modes based on the distribution network automation simulation system.
Optionally, fig. 3 is a block diagram of another distribution network automation simulation system according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 3, the cable distribution box module 20 further includes a secondary loop control unit 250, wherein the secondary loop control unit 250 is connected to the terminal unit 220;
the secondary circuit control unit 250 is configured to perform on-off control of the secondary circuit of the terminal unit 220 in response to a control signal of a user.
Specifically, the terminal unit 220 controls the on/off of the primary loop device through the signal of the secondary loop. In the present embodiment, the secondary circuit control unit 250 is configured in the cable tap box to control the on/off of the secondary circuit of the terminal unit 220. The secondary circuit control unit 250 has the advantages that the opening and closing operation of the controllable switch 230 can be controlled to be protected, the opening and closing action expected by a user is executed, and the influence of the opening and closing action without operation permission on the fault diagnosis process of the simulation power distribution network is avoided.
When the secondary loop control unit 250 is in the normal mode, the secondary loop of the terminal unit 220 is turned on, at this time, the terminal unit 220 may control the controllable switch 230 of the primary loop, and the terminal unit 220 controls the controllable switch 230 of the primary loop according to the set fault detection mode to simulate the fault action process of the power distribution network segment.
When the secondary circuit control unit 250 is in an off state, the secondary circuit of the terminal unit 220 is in an open circuit, the opening and closing control signal of the terminal unit 220 cannot be transmitted to the controllable switch 230, and the condition that the secondary circuit fails and the power distribution network segment cannot be subjected to fault detection can be simulated under this working condition.
In this embodiment, the secondary circuit control unit 250 is arranged to simulate the on-off state of the secondary circuit, so that a trainee can know the situation that the on-off control of the controllable switch 230 cannot be performed when the secondary circuit of the terminal unit 220 has an open circuit fault.
Optionally, the secondary loop control unit 250 includes a protection opening control switch 251, a protection closing control switch 252, a remote opening control switch 253, and a remote closing control switch 254.
Specifically, the protection opening and closing control switch 251 and the protection closing control switch 252 are used for simulating a relay protection opening and closing function. When the protection opening control switch 251 and the protection closing control switch 252 are in an input state, the secondary circuit is in a conducting state, and at this time, the terminal unit 220 may control the controllable switch 230 to simulate a relay protection function.
The remote control opening and closing control switch 253 and the remote control closing control switch 254 are used for simulating the situation of remote control opening and closing. The remote control switching-on/off function may be, for example, that the terminal unit 220 is in communication connection with a remote control host, and the remote control host controls the controllable switch 230 in the simulated power distribution network to perform switching-on/off according to a predetermined control strategy through the terminal unit 220, so as to perform fault diagnosis on the simulated power distribution network. At this time, if the remote opening control switch 253 and the remote closing control switch 254 are in an on state, the remote control host may remotely control the controllable switch 230 to open and close to perform fault diagnosis on the simulated power distribution network. If the remote opening/closing control switch 253 and the remote closing control switch 254 are not in operation, the remote control host cannot transmit the opening/closing command to the controllable switch 230, and thus cannot perform the remote opening/closing operation on the controllable switch 230.
Optionally, with reference to fig. 3, the cable distribution box module 20 further includes a protection switching-off indicator 261 connected in series to the connection loop of the protection switching-off control switch 251, a protection switching-on indicator 262 connected in series to the connection loop of the protection switching-on control switch 252, a remote switching-off indicator 263 connected in series to the connection loop of the remote switching-off control switch 253, and a remote switching-on indicator 264 connected in series to the connection loop of the remote switching-on control switch 254.
Specifically, the indicator light is used for indicating whether the corresponding control switch is in a working state. By setting the indicator light, the training personnel can conveniently identify the control mode of the secondary circuit of the terminal unit 220.
For example, when the remote opening indicator 263 and the remote closing indicator 264 are not turned on, it indicates that the remote control host cannot perform on-off control on the connected controllable switch 230 through the terminal unit 220, and thus failure diagnosis on the simulated power distribution network by the remote control host cannot be achieved.
Optionally, on the basis of the above embodiment, the controllable switch 230 is an analog circuit breaker.
This embodiment carries out on-off control to the primary circuit of emulation distribution network through setting up simulation circuit breaker to multichannel distribution signal in the many interfaces emulation distribution network through simulation circuit breaker realizes the fault action simulation to many fault types.
Optionally, on the basis of the above embodiment, with reference to fig. 3, the number of the substation modules 10 is two, and the two substation modules 10 are disposed at two ends of the simulated power distribution network to form a dual-power-supply power distribution ring network.
Specifically, two transformer substation modules 10 are arranged at two ends of the simulation power distribution network to form a dual-power distribution ring network. The benefit that sets up like this lies in, simulates dual supply distribution looped netowrk through setting up two transformer substation modules 10, when locating the fault location of emulation distribution network through terminal unit 220, can realize supplying power for the emulation distribution network simultaneously from two directions through the dual supply to reach when keeping apart the trouble section, can continue to supply power for other non-trouble sections, guarantee the normal work of non-trouble section in the emulation distribution network, in order to simulate out actual looped netowrk effect.
In the embodiment, the double-substation module 10 is arranged to simulate the fault action and the diagnosis process of the dual-power distribution ring network, so that the fault simulation type of the simulation system is expanded.
The distribution network automation simulation system provided by the embodiment of the invention mainly simulates the demonstration and storage of action records (SOE) and messages of a feeder automation circuit in a voltage-time type protection mode, a voltage-current type protection mode, a conventional protection type protection mode and an intelligent distributed action process under a small-resistance grounding system and an arc suppression coil grounding system. Besides, each circuit breaker can input analog current quantity and voltage quantity, acquire the analog current quantity and the voltage quantity in real time through each terminal unit, and feed back the analog current quantity and the voltage quantity in real time through the remote signaling and remote measuring function of each terminal unit to act on the analog circuit breaker.
Optionally, fig. 4 is a flowchart of a power distribution network fault simulation method according to an embodiment of the present invention, where the power distribution network fault simulation method is applicable to a situation of performing field training on power distribution operation and maintenance personnel, so that the operation and maintenance personnel can know an action process of a common fault through a simulation system. Referring to fig. 4, the power distribution network fault simulation method includes the following steps:
and S410, setting a fault signal through a fault signal simulation unit.
Wherein, the fault signal simulation unit can set different types of fault signals. The fault signal simulation units are arranged in the cable tapping boxes, and each cable tapping box is correspondingly provided with one fault signal simulation unit, so that fault signals can be set at different positions in the simulation power distribution network through the fault signal simulation units.
And S420, acquiring input signals and output signals of the cable tapping box module through the terminal unit, carrying out fault diagnosis on the simulation power distribution network segment to which the cable tapping box module belongs according to the input signals and the output signals by the terminal unit, and outputting switch control signals through the terminal unit when the corresponding simulation power distribution network segment is determined to have faults.
The terminal unit has the functions of remote measurement, remote signaling and remote control, and can perform fault diagnosis on the simulation power distribution network segment based on the acquired voltage and current signals.
The input signals refer to a voltage input signal and a current input signal on the bus side of the cable distribution box. The output signals refer to voltage output signals and current output signals of the load side of the cable distribution box. The terminal unit is used for diagnosing whether the simulated power distribution network segment has faults or not by calculating the input voltage signal, the output voltage signal, the input current signal and the output current signal according to the set logic.
When the terminal unit determines that the simulated power distribution network segment has a fault, the terminal unit outputs a switch control signal to the connected controllable switch so as to control the controllable switch to be switched on and off.
And S430, responding to the switch control signal output by the terminal unit through the controllable switch so as to switch the on-off state of the corresponding simulation power distribution network segment.
The controllable switches are connected with the terminal units in a one-to-one correspondence mode, so that the terminal units can perform switching-on and switching-off operations on the simulation power distribution network section to which the terminal units belong through the controllable switches, and the on-off state of the simulation power distribution network section is switched, so that fault diagnosis is performed on the simulation power distribution network section.
According to the power distribution network fault simulation method provided by the embodiment of the invention, set fault signals are output at different positions of a simulated power distribution network through the fault signal simulation unit configured in the cable tapping box; the input signal and the output signal of the power distribution network are collected through the terminal unit, fault diagnosis is carried out on the corresponding power distribution network segment based on the collected input signal and the collected output signal, and when the fault exists in the power distribution network segment, a switch control signal is output to the connected controllable switch to control the controllable switch to carry out switching-on and switching-off actions, so that fault diagnosis on the simulation power distribution network is realized. The power distribution network fault simulation method provided by the embodiment has the advantages of being simple to implement and intuitive in fault action process.
Optionally, on the basis of the above technical solution, in order to simulate different types of fault detection modes, the distribution network automation simulation system in this embodiment further includes a protection mode setting unit, and accordingly, before the terminal unit collects the input signal and the output signal of the cable tapping box module, the distribution network fault simulation method further includes:
and setting a fault detection mode of the terminal unit through the protection mode setting unit to instruct the terminal unit to perform fault diagnosis on the corresponding simulation power distribution network segment according to the set type of fault detection mode, wherein the fault detection mode at least comprises a voltage time type protection mode, a voltage current type protection mode, a conventional protection type protection mode and an intelligent distributed protection mode.
Specifically, before training begins, a protection mode to be simulated is set, so that the terminal unit performs fault detection on the simulated power distribution network according to the set fault detection mode, and fault detection and action processes of corresponding types are simulated.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A distribution network automation simulation system is characterized by comprising at least one transformer substation module and at least two cable tapping box modules, wherein the cable tapping box modules are connected in series, the output end of at least one transformer substation module is connected with a bus, and the cable tapping box modules are respectively connected with the bus; each cable distribution box module comprises a fault signal simulation unit, a terminal unit and a controllable switch;
the fault signal simulation unit is used for outputting a fault signal of a set type;
the terminal unit is used for acquiring an input signal and an output signal of the cable tapping box module, performing fault diagnosis on a simulation power distribution network segment to which the cable tapping box module belongs based on the input signal and the output signal, and outputting a switch control signal when determining that a fault exists in the simulation power distribution network segment;
the controllable switch is connected with the terminal unit and used for responding the switch control signal to switch the on-off state corresponding to the simulation power distribution network segment.
2. The distribution network automation simulation system of claim 1, wherein the cable breakout box module further comprises a protection mode setting unit;
the protection mode setting unit is connected with the terminal unit and is used for setting a fault detection mode of the terminal unit so as to instruct the terminal unit to carry out fault diagnosis on the corresponding simulation power distribution network segment according to the input signal and the output signal according to the set fault detection mode.
3. The distribution network automation simulation system of claim 1, wherein the cable breakout box module further comprises a secondary loop control unit, the secondary loop control unit being connected to the terminal unit;
and the secondary loop control unit is used for responding to a control signal of a user and controlling the on-off of the secondary loop of the terminal unit.
4. The distribution network automation simulation system of claim 3, wherein the secondary loop control unit comprises a protection switching-off control switch, a protection switching-on control switch, a remote switching-off control switch and a remote switching-on control switch.
5. The distribution network automation simulation system of claim 4, wherein the cable distribution box module further comprises a protection switching-off indicator lamp connected in series to a connection loop of the protection switching-off control switch, a protection switching-on indicator lamp connected in series to a connection loop of the protection switching-on control switch, a remote switching-off indicator lamp connected in series to a connection loop of the remote switching-off control switch, and a remote switching-on indicator lamp connected in series to a connection loop of the remote switching-on control switch.
6. The distribution network automation simulation system of claim 1 wherein the input signals comprise voltage input signals and current input signals; the output signals include a voltage output signal and a current output signal.
7. The distribution network automation simulation system of any of claims 1 to 6 wherein the controllable switches are analog circuit breakers.
8. The distribution network automation simulation system of any one of claims 1 to 6 wherein the number of the substation modules is two, and two of the substation modules are arranged at two ends of a simulated distribution network to form a dual power distribution ring network.
9. A power distribution network fault simulation method applied to the power distribution network automation simulation system of any one of claims 1 to 7, wherein the method comprises:
setting a fault signal through a fault signal simulation unit;
acquiring an input signal and an output signal of a cable tapping box module through a terminal unit, carrying out fault diagnosis on a simulation power distribution network segment to which the cable tapping box module belongs according to the input signal and the output signal by the terminal unit, and outputting a switch control signal through the terminal unit when determining that a fault exists in the corresponding simulation power distribution network segment;
and responding to the switch control signal output by the terminal unit through the controllable switch so as to switch the on-off state corresponding to the simulation power distribution network segment.
10. The power distribution network fault simulation method of claim 9, wherein the power distribution network automation simulation system further comprises a protection mode setting unit, and before the collecting the input signal and the output signal of the cable breakout box module by the terminal unit, the method further comprises:
and setting a fault detection mode of the terminal unit through the protection mode setting unit to indicate the terminal unit to perform fault diagnosis on the corresponding simulation power distribution network segment according to a set type of fault detection mode, wherein the fault detection mode at least comprises a voltage time type protection mode, a voltage current type protection mode, a conventional protection type protection mode and an intelligent distributed protection mode.
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