CN212208692U - Power line simulation fault experiment module and fault detection system - Google Patents

Abstract

The utility model discloses a power line simulation fault experiment module and fault detection system, the terminal MG-1 of trouble experiment module, MG-2, MG-3, MG-4 pass through during the line A, B, C, N of the corresponding position major loop of simulation fault test point that the wire connection needs to detect, the terminal MG-5 of trouble experiment module, MG-6 correspond the terminal L, N that is connected to control power supply, the trouble mode selection change over switch on the rotation panel selects the experimental mode to carry out the trouble experiment of relevant type, the experimental mode includes single-phase earth fault experiment or alternate short circuit fault experiment. The utility model discloses a through the wiring cooperation between each module, can let the student have more deep understanding to power line fault detection in the simulation experiment, the theoretical knowledge that will master combines together with real standard operation.

Description

Power line simulation fault experiment module and fault detection system

Technical Field

The utility model belongs to the technical field of simulation experiment system, concretely relates to power line simulation fault experiment module and fault detection system.

Background

With the development of scientific technology and the appearance of new technology, the social demand on electric power is higher and higher, the requirement on electric power reliability is higher and higher, whether a fault exists in a power transmission line to be switched on or not cannot be predicted before the line is put into use, and the input of the fault in the line can not only cause adverse effects on system elements, but also can cause casualties. Therefore, in a power supply and distribution system, the circuit breaker is objectively required to have a pre-detection function before switching on, and when the load side of the circuit breaker is in or close to a state of short circuit between phase lines or grounding of the phase lines, the circuit breaker can timely and accurately sense the short circuit or grounding of the phase lines, so that preventive measures can be actively taken. The social demand on technical renewal developers is increasing day by day, the attention degree on the cultivation of the practical ability and the cultivation of the innovation ability of students is obvious day by day, meanwhile, the experimental equipment of part of engineering and technology training centers only focuses on the cultivation of the practical ability and lacks the cultivation of the innovation ability and the innovation consciousness, in particular to electromechanical and electrical related teaching and training equipment, only focuses on application and lacks innovation, and in order to deepen practice and understanding on fault detection of a power line, a novel fault detection system for simulating the fault of the power line needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that exists on the above-mentioned prior art, provide a power line simulation fault experiment module and fault detection system, the utility model discloses a through the wiring cooperation between each module, can let the student have more deep understanding to power line fault detection in the simulation experiment, combine together theoretical knowledge and the real operation of instructing of mastering.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a power line simulation fault experiment module is characterized in that terminals MG-1, MG-2, MG-3 and MG-4 of the fault experiment module are connected with a main circuit corresponding line A, B, C, N corresponding to a simulation fault experiment point to be detected through a lead, terminals MG-5 and MG-6 of the fault experiment module are correspondingly connected to a control power supply, a change-over switch MG-S1 is turned to a single-phase grounding position, a contact 13/14 of the change-over switch MG-S1 is closed, a coil MG-KM3 and a coil MG-KM4 are attracted, main contacts 1/2, 3/4 and 5/6 of a contact switch MG-KM3 are attracted, a main contact 1/2 of the contact switch MG-KM4 is attracted, an experiment button MG-K1 or MG-K2 or any one of MG-K3 is pressed, and the simulation fault experiment module is used for simulating a corresponding line A in a main circuit, B. C, single-phase earth fault; when the change-over switch MG-S1 is switched to an interphase short-circuit position, a contact 23/24 of the change-over switch MG-S1 is closed, a coil MG-KM3 is attracted, main contacts 1/2, 3/4 and 5/6 of MG-KM3 are attracted, and any two of experiment buttons MG-K1, MG-K2 and MG-K3 are pressed simultaneously to simulate interphase short-circuit fault of a corresponding line A, B, C in a main loop.

The scheme also provides a fault detection system which comprises a line impedance module and the power line simulation fault experiment module, wherein terminals XK-4, XK-5, XK-6 and XK-8 of the line impedance module are correspondingly connected with terminals MG-1, MG-2, MG-3 and MG-4 of the fault experiment module.

The scheme is further improved, the reactive power measurement circuit further comprises a reactive power measurement module and an active power measurement module, terminals XK-1, XK-2, XK-3 and XK-7 of the line impedance module are connected with the reactive power measurement module through conducting wires, terminals XK-1, XK-2 and XK-3 of the line impedance module respectively sequentially pass through terminals XK-4, XK-5 and XK-6 of the diode and the inductive reactance connecting line impedance module, and the terminal XK-7 of the line impedance module is connected with a terminal XK-8 through the conducting wires.

According to the scheme, a reactive power measurement module is used for measuring and displaying the real-time reactive power quantity in the line operation, an active power measurement module is used for measuring and displaying the real-time active power quantity in the line operation, terminals ULP-4, ULP-5, ULP-6 and ULP-8 of the reactive power measurement module correspond to terminals XK-1, XK-2, XK-3 and XK-7 of a connecting line impedance module, terminals ULP-1, ULP-2, ULP-3 and ULP-7 of the reactive power measurement module correspond to a terminal UP-4 of the active power measurement module, UP-5, UP-6 and UP-8, and the terminals UP-1, UP-2, UP-3 and UP-7 of the active power measurement module are correspondingly connected with corresponding terminals in a line A, B, C, N of the main loop.

This scheme has following beneficial effect:

1. the utility model is improved, the module practicability is strong, the application range is wide, the device is suitable for all AC380V voltage simulation high-voltage part experiments with any voltage level, the application position range is wide, and the device can be used for simulating the fault at each fault position; the use method is simple, the interfaces are unified, and the universality is high. The simulation fault detection system has the advantages that all modules of the simulation fault detection system are matched through wiring, students can learn about the working principle of the circuit breaker more deeply in simulation experiments, the grasped theoretical knowledge is combined with practical training operation, the fault mode selection change-over switch on the panel is rotated, two experiment modes can be selected, a main circuit can generate single-phase earth faults or phase-to-phase short-circuit faults, after the single-phase earth faults or the phase-to-phase short-circuit faults simulated by the simulation fault detection system occur, the simulation circuit breaker state information and the fault message information are transmitted to the monitoring system, fault display and fault information on the interface of the monitoring system analyze and judge the occurrence position, fault reasons and the like of the faults, and accordingly the capability of training personnel in analyzing, judging and solving the faults is exercised.

2. The utility model discloses in, the impedance that line impedance module is used for simulating this section circuit, and there is impedance in the transmission line in the actual electric wire netting, simulates line impedance through this module, can be more close to the true on-the-spot electric quantity of simulation and change and characteristic.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and 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 these drawings without creative efforts.

Fig. 1 is a circuit diagram of a middle fault experimental module of the present invention;

fig. 2 is a circuit diagram of the line impedance module of the present invention;

fig. 3 is a circuit diagram of the reactive power measurement module of the present invention;

fig. 4 is a circuit diagram of the active power measurement module of the present invention;

the labels in the figure are: 1. the fault testing module 2, the line impedance module 3, the reactive power measuring module 4 and the active power measuring module.

Detailed Description

In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Example 1

The embodiment provides a power line simulation fault experiment module, terminals MG-1, MG-2, MG-3, and MG-4 of a fault experiment module 1 are connected with a line A, B, C, N of a main circuit corresponding to a simulation fault experiment point to be detected through a wire, terminals MG-5 and MG-6 of the fault experiment module 1 are correspondingly connected with a terminal of a control power supply L, N, a switch MG-S1 is turned to a single-phase grounding position, a contact 13/14 of the switch MG-S1 is closed, a coil MG-KM3 and a coil MG-KM4 are attracted, main contacts 1/2, 3/4, and 5/6 of contact switches MG-KM3 are attracted simultaneously, a main contact 1/2 of the contact switch MG-KM4 is attracted, an experiment button MG-K1 or MG-K2 is pressed, or MG-K3 for simulating single-phase earth fault of corresponding line A, B, C in the main loop; when the change-over switch MG-S1 is switched to an interphase short-circuit gear, a contact 23/24 of the change-over switch MG-S1 is closed, a coil MG-KM3 is attracted, main contacts 1/2, 3/4 and 5/6 of MG-KM3 are attracted, and any two of experiment buttons MG-K1, MG-K2 and MG-K3 are pressed simultaneously to simulate interphase short-circuit fault of a corresponding line A, B, C in a main loop.

The working principle of the fault detection module 1 is as follows: connecting MG-1, MG-2, MG-3 and MG-4 in the fault experimental module 1 into XK-5, XK-6, XK-7 and XK-8 of the line impedance module 2 by using experimental leads, connecting MG-5 and MG-6 into a control power supply L, N terminal of a power supply module, then rotating a fault selection transfer switch to a single-phase grounding or interphase short circuit corresponding gear, when the single-phase grounding gear is rotated, closing 13/14 of MG-S1, controlling MG-KM3 by using a group of normally open points 5/9 of MG-KA4, attracting coils MG-KM3 and MG-KM4, and attracting main contacts 1/2, 3/4, 5/6 and main contacts 1/2 of MG-KM4 of MG-KM 3; if the MG-K1 is pressed by inching, the MG-KM5 coil is attracted, and meanwhile the MG-KM5 main contact 1/2 is attracted, at the moment, the A phase simulates the fault of single phase to ground, and the B, C phase principle is the same; when the inter-phase short-circuit gear is switched, 23/24 of MG-S1 is closed, the MG-KM3 coil is attracted, and main contacts 1/2, 3/4 and 5/6 of MG-KM3 are attracted; if the MG-K1 and the MG-K2 are pressed by inching, the MG-KM5 and the MG-KM6 coils attract each other, and meanwhile, the MG-KM5 main contact 1/2 and the MG-KM6 main contact 1/2 attract each other simultaneously, at the moment, the AB phase simulates the inter-phase short circuit fault in the main loop, and the BC phase and the CA phase have the same principle.

Example 2

As shown in the figure: the embodiment provides a power line simulation fault detection system, which comprises a fault experiment module 1, a line impedance module 2, a reactive power measurement module 3, an active power measurement module 4 and a power supply module, wherein terminals MG-1, MG-2, MG-3 and MG-4 of the fault experiment module 1 are connected with a line A, B, C, N of a main loop corresponding to a simulation fault experiment point required to be detected through leads, terminals MG-5 and MG-6 of the fault experiment module 1 are correspondingly connected with a control power supply L, N terminal, a change-over switch MG-S1 is turned to a single-phase grounding position, a contact 13/14 of the change-over switch MG-S1 is closed, a coil MG-KM3 and a coil MG-KM4 are attracted, meanwhile, main contacts 1/2, 3/4 and 5/6 of the contact switch MG-KM3 are attracted, a main contact 1/2 of the contact switch MG-KM4 is attracted, clicking and pressing any one of an experiment button MG-K1, MG-K2 or MG-K3 to simulate the single-phase earth fault of a corresponding line A, B, C in a main circuit; when the change-over switch MG-S1 is switched to an interphase short-circuit gear, a contact 23/24 of the change-over switch MG-S1 is closed, a coil MG-KM3 is attracted, main contacts 1/2, 3/4 and 5/6 of MG-KM3 are attracted, and any two of experiment buttons MG-K1, MG-K2 and MG-K3 are pressed simultaneously to simulate interphase short-circuit fault of a corresponding line A, B, C in a main loop.

The terminals XK-1, XK-2, XK-3 and XK-7 of the line impedance module 2 are connected with the reactive power measurement module 3 through leads, the terminals XK-1, XK-2 and XK-3 of the line impedance module 2 are respectively connected with the terminals XK-4, XK-5 and XK-6 of the line impedance module 2 through diodes and inductive reactance sequentially, the terminal XK-7 of the line impedance module 2 is connected with the terminal XK-8 through a lead, and the terminals XK-4, XK-5, XK-6 and XK-8 of the line impedance module 2 are correspondingly connected with the terminals MG-1, MG-2, MG-3 and MG-4 of the fault experiment module 1. The line impedance module 2 is used for simulating the impedance of the section of line, the transmission line in the actual power grid has impedance, and the line impedance is simulated through the module, so that the electric quantity change and the characteristics of a real field can be simulated more closely.

The reactive power measurement module 3 is used for measuring and displaying the instant reactive power quantity in line operation, the active power measurement module 4 is used for measuring and displaying the instant active power quantity in line operation, the terminals ULP-4, ULP-5, ULP-6 and ULP-8 of the reactive power measurement module 3 correspond to the terminals XK-1, XK-2, XK-3 and XK-7 of the connection line impedance module 2, the terminals ULP-1, ULP-2, ULP-3 and ULP-7 of the reactive power measurement module 3 correspond to the terminals UP-4, UP-5, UP-6 and UP-8 of the active power measurement module 4, the terminals UP-1, UP-2, UP-3, UP-7 of the active measurement module 4 are correspondingly connected with corresponding terminals in the line A, B, C, N of the main loop.

The specific operation experimental method is as follows: when fault simulation experiment operation is carried out, firstly, a simulation circuit breaker or a circuit breaker is in a closing state, the system operation is confirmed to be in a normal state, and a fault mode selection change-over switch on a rotating panel selects an experiment mode, so that relevant types of fault experiments are carried out, wherein the experiment mode comprises a single-phase earth fault experiment or an interphase short circuit fault experiment. Secondly, selecting an experimental mode, rotating the fault mode selection change-over switch on the panel, when the fault mode selection change-over switch on the panel is placed on the single-phase ground, the single-phase earth fault experiment can be carried out, when the MG-K1, the MG-K2 or the MG-K3 in the simulated fault experiment module 1 is pressed, the main loop can generate single-phase earth fault, the microcomputer protection device module can immediately send out an instruction to make the analog circuit breaker or the circuit breaker trip when detecting that the fault is generated in the loop, meanwhile, the state information and the fault message information of the simulation circuit breaker or the circuit breaker after the single-phase earth fault occurs are transmitted to the SCADA monitoring system module, analyzing and judging the occurrence position, the fault reason and the like of the fault through fault display and fault information on an interface of an SCADA monitoring system module, thereby training the capability of analyzing, judging and solving the fault of training personnel; when the fault mode selection changeover switch on the board is arranged in an interphase short circuit, an interphase short circuit fault experiment can be carried out, at the moment, when the MG-K1 and the MG-K2, or the MG-K2 and the MG-K3, or the MG-K3 and the MG-K1 in the simulated fault experiment module 1 are simultaneously pressed by inching, an interphase short circuit fault can be generated in a main loop, the microcomputer protection device module detects that the fault is generated in the loop, an instruction can be immediately sent out to enable the simulated breaker or the breaker to jump off, state information and fault message information of the simulated breaker or the breaker after the interphase short circuit fault is generated are simultaneously transmitted to the SCADA monitoring system module, fault display and fault information on a simulation interface of the SCADA monitoring system are used for analyzing and judging the generation position, fault reason and the like of the fault, and accordingly training capability of personnel for analyzing, judging and solving the.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims (4)

1. The utility model provides a power line simulation fault experiment module which characterized in that: terminals MG-1, MG-2, MG-3, MG-4 of the failure experiment module (1) are connected with a simulation failure experiment point needing to be detected through a lead in a line A, B, C, N corresponding to a main loop, terminals MG-5, MG-6 of the failure experiment module (1) are correspondingly connected to a control power supply, a change-over switch MG-S1 is turned to a single-phase grounding position, a contact 13/14 of the change-over switch MG-S1 is closed, a coil MG-KM3 and a coil MG-KM4 are attracted, main contacts 1/2, 3/4, 5/6 of the contact switch MG-KM3 are attracted, a main contact 1/2 of the contact switch MG-KM4 is attracted, an experiment button MG-K1, MG-K2 or MG-K3 is pressed in a point-press mode, and the simulation failure experiment module is used for simulating a corresponding line A in the main loop, B. C, single-phase earth fault; when the change-over switch MG-S1 is switched to an interphase short-circuit position, a contact 23/24 of the change-over switch MG-S1 is closed, a coil MG-KM3 is attracted, main contacts 1/2, 3/4 and 5/6 of MG-KM3 are attracted, and any two of experiment buttons MG-K1, MG-K2 and MG-K3 are pressed simultaneously to simulate interphase short-circuit fault of a corresponding line A, B, C in a main loop.

2. A fault detection system, characterized by: the power line simulation fault experiment module comprises a line impedance module (2) and the power line simulation fault experiment module as claimed in claim 1, wherein terminals XK-4, XK-5, XK-6 and XK-8 of the line impedance module (2) are correspondingly connected with terminals MG-1, MG-2, MG-3 and MG-4 of the fault experiment module (1).

3. A fault detection system as claimed in claim 2, wherein: the circuit impedance measuring device is characterized by further comprising a reactive power measuring module (3) and an active power measuring module (4), terminals XK-1, XK-2, XK-3 and XK-7 of the circuit impedance module (2) are connected with the reactive power measuring module (3) through conducting wires, terminals XK-1, XK-2 and XK-3 of the circuit impedance module (2) respectively sequentially pass through terminals XK-4, XK-5 and XK-6 of the diode and the inductive reactance connecting circuit impedance module (2), and the terminal XK-7 of the circuit impedance module (2) is connected with a terminal XK-8 through a conducting wire.

4. A fault detection system as claimed in claim 3, wherein: the reactive power measurement module (3) is used for measuring and displaying the real reactive power quantity in line operation, the active measurement module (4) is used for measuring and displaying the real active power quantity in line operation, the terminals ULP-4, ULP-5, ULP-6 and ULP-8 of the reactive power measurement module (3) correspond to the terminals XK-1, XK-2, XK-3 and XK-7 of the connection line impedance module (2), the terminals ULP-1, ULP-2, ULP-3 and ULP-7 of the reactive power measurement module (3) correspond to the terminals UP-4, UP-5, UP-6 and UP-8 of the active power measurement module (4), and the terminals UP-1, UP-2, UP-3 and UP-7 of the active power measurement module (4) correspond to the line A connected with the main loop, B. C, N.

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