Relay protector protection device for transformer substation

Abstract

The utility model belongs to the technical field of transformer substation protection, and particularly discloses a protective device of a relay protector for a transformer substation, which comprises a relay protection box and an acquisition box, the acquisition box is connected to the front wall of the relay protection box, a current transformer is arranged in the acquisition box, the current transformer is connected with a lead of the transformer substation, and the current transformer is connected with the lead of the transformer substation. A current detector, a PLC processor and a battery assembly are arranged in the relay protection box. Three contacts are formed among the first wiring terminal, the second wiring terminal and the third wiring terminal, the movable conducting rod is connected with the second wiring terminal all the time, when a transformer substation wire is normally used for power supply, the movable conducting rod and the first wiring terminal keep in contact, and the transformer substation wire is in a closed state; when the current of the transformer substation wire is large and potential safety hazards exist, the movable conducting rod is switched to be connected with the third wiring terminal, so that the transformer substation wire is disconnected, and meanwhile, a circuit among the second wiring terminal, the third wiring terminal, the battery assembly and the alarm is closed to give an alarm.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substation protection, in particular to a relay protector protection device for transformer substation. Background Art

[0002] A substation is a place in the power system that transforms voltage and current, receives electric energy, and distributes electric energy. The substation in a power plant is a step-up substation, which boosts the electric energy generated by the generator and feeds it into the high-voltage power grid.

[0003] The secondary equipment of a substation refers to the equipment that measures, monitors, controls and protects the operating conditions of primary equipment and systems. It mainly consists of relay protection devices, automatic devices, measurement and control devices, metering devices, automation systems and DC equipment that provides power to secondary equipment.

[0004] When the current relay protection device is in use, its circuit cutting and warning reminder are often not performed at the same time, so it is difficult for users who are not using electricity to find out the power outage in time and take corresponding countermeasures. Utility Model Content

[0005] The purpose of the utility model is to provide a relay protector protection device for a substation to solve the problem raised in the above-mentioned background technology that the current relay protection device, when in use, often cannot cut off the circuit and warn and remind at the same time, so that users who are not using electric energy find it difficult to find out the power outage in time and take corresponding countermeasures.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a relay protection device for a substation, comprising: a relay protection box, a collection box, the collection box is connected to the front wall of the relay protection box, a current transformer is arranged inside the collection box, the current transformer is connected to the substation conductor, a current detector, a PLC processor and a battery assembly are arranged inside the relay protection box, the signal output end of the current transformer is connected to the current detector, the signal output end of the current detector is connected to the PLC processor, and the relay protection box is also provided with a connection Terminal 1, terminal 2 and terminal 3, the terminal 2 is arranged at the leftmost side inside the relay protection box, the terminal 3 and terminal 1 are respectively located at the front and rear parts of the right side of terminal 2, the right side of terminal 2 is movably connected with a movable conductive rod through a pin shaft, the movable conductive rod is located between terminal 3 and terminal 1, an electric control switching mechanism is arranged on the right side of the movable conductive rod, the battery assembly is electrically connected to the current detector, the PLC processor, and the electric control switching mechanism, the terminal 2 and terminal 3 are connected to the battery assembly through wires, and the terminal 1 and terminal 2 are connected to the substation wires.

[0007] Preferably, an alarm is provided on the upper surface of the relay protection box, and the alarm is connected in series between the third terminal and the battery assembly.

[0008] Preferably, the alarm is an alarm indicator light or an alarm speaker.

[0009] Preferably, the relay protection box and the collection box are both made of insulating plastic.

[0010] Preferably, the wiring terminal 1, the wiring terminal 2, the wiring terminal 3 and the movable conductive rod are all made of copper.

[0011] Preferably, the electrically controlled switching mechanism includes an armature connected to the right end of the movable conductive rod, an electromagnet arranged on the rear side of the armature, and a return spring connected to the front side of the armature, the front end of the return spring is connected to the front side of the inner wall of the relay protection box, and the electromagnet is connected to the signal output end of the PLC processor.

[0012] Preferably, the armature is in a circular ring shape, and the armature is sleeved on the right end of the movable conductive rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Three contacts are formed between terminal one, terminal two and terminal three, and the movable conductive rod is always connected to terminal two. When the substation conductor is powered normally, terminal one of the movable conductive rod remains in contact and the substation conductor is in a closed state. When the substation conductor current is large and there is a safety hazard, the movable conductive rod is switched to connect to terminal three, so that the substation conductor is disconnected, and at the same time, the circuit between terminal two, terminal three, battery assembly and alarm is closed to sound an alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 Schematic diagram of the structure after removing the collection box;

[0017] Figure 3 The figure is a schematic diagram of the internal structure of the relay protection box of the utility model.

[0018] In the figure: 1. Relay protection box; 2. Collection box; 3. Substation conductor; 4. Current transformer; 5. Current detector; 6. PLC processor; 7. Battery assembly; 8. Terminal one; 9. Terminal two; 10. Terminal three; 11. Movable conductive rod; 12. Armature; 13. Electromagnet; 14. Reset spring; 15. Alarm. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Embodiment 1:

[0022] See also Figure 1-3 The utility model provides a technical solution: a relay protection device for a substation, comprising: a relay protection box 1, a collection box 2, the collection box 2 is connected to the front wall of the relay protection box 1, a current transformer 4 is arranged inside the collection box 2, the current transformer 4 is connected to the substation conductor 3, a current detector 5, a PLC processor 6 and a battery assembly 7 are arranged inside the relay protection box 1, the signal output end of the current transformer 4 is connected to the current detector 5, the signal output end of the current detector 5 is connected to the PLC processor 6, and the relay protection box 1 is also provided with a terminal 1 8 and a terminal 2 9 and terminal three 10, the terminal two 9 is arranged at the leftmost side inside the relay protection box 1, the terminal three 10 and the terminal one 8 are respectively located at the front and rear parts of the right side of the terminal two 9, the right side of the terminal two 9 is movably connected with a movable conductive rod 11 through a pin shaft, the movable conductive rod 11 is located between the terminal three 10 and the terminal one 8, and an electric control switching mechanism is arranged on the right side of the movable conductive rod 11, the battery assembly 7 is electrically connected with the current detector 5, the PLC processor 6, and the electric control switching mechanism, the terminal two 9 and the terminal three 10 are connected with the battery assembly 7 through a wire, and the terminal one 8 and the terminal two 9 are connected with the transformer substation wire 3. An alarm 15 is arranged on the upper surface of the relay protection box 1, and the alarm 15 is connected in series between the terminal three 10 and the battery assembly 7. The alarm 15 is an alarm indicator light or an alarm speaker.

[0023] Analysis of the above content: When in use, a section of the substation conductor 3 is wound around the core of the current transformer 4, and the current of the substation conductor 3 is monitored through the current transformer 4. The monitoring result is output to the current detector 5, and the current safety value range is pre-set. The monitored current value is compared with the current safety value range. When the monitored current value is within the current safety value range, it is considered to be safe for operation; when the monitored current value exceeds the current safety value range, it is considered to be unsafe, and the PLC processor 6 outputs a control electric control switching mechanism, and the electric control switching mechanism controls the movement of the movable conductive rod 11, and the movable conductive rod 11 is switched from terminal one 8 to terminal three 10, so that the substation conductor 3 is disconnected. At this time, the circuit where the alarm 15 is located is closed, and the alarm 15 alarms.

[0024] Embodiment 2:

[0025] See also Figure 1-3 The utility model provides a technical solution: the relay protection box 1 and the collection box 2 are made of insulating plastic. The terminal 1 8, the terminal 2 9, the terminal 3 10, and the movable conductive rod 11 are made of copper.

[0026] Analysis of the above content: The use of insulating plastic material can prevent electric shock. The copper terminal 1 8, terminal 2 9, terminal 3 10, and movable conductive rod 11 have good conductivity.

[0027] Embodiment three:

[0028] See also Figure 1-3 The utility model provides a technical solution: the electric control switching mechanism includes an armature 12 connected to the right end of the movable conductive rod 11, an electromagnet 13 arranged at the rear side of the armature 12, and a return spring 14 connected to the front side of the armature 12, the front end of the return spring 14 is connected to the front side of the inner wall of the relay protection box 1, and the electromagnet 13 is connected to the signal output end of the PLC processor 6. The armature 12 is annular and sleeved on the right end of the movable conductive rod 11.

[0029] Analysis of the above content: Under normal use, under the traction of the elastic force of the reset spring 14, the right end of the movable conductive rod 11 is attached to the terminal one 8. When it is considered unsafe to use electricity, the electromagnet 13 is energized to generate a magnetic field, which adsorbs the armature 12, overcomes the elastic force of the reset spring 14, and causes the movable conductive rod 11 to rotate, and the right end of the movable conductive rod 11 is attached to the terminal three 10.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A relay protection device for a substation, characterized in that: include: A relay protection box (1) and a data collection box (2), wherein the data collection box (2) is connected to the front wall of the relay protection box (1), a current transformer (4) is arranged inside the data collection box (2), and the current transformer (4) is connected to a transformer substation conductor (3), a current detector (5), a PLC processor (6) and a battery assembly (7) are arranged inside the relay protection box (1), a signal output end of the current transformer (4) is connected to the current detector (5), and a signal output end of the current detector (5) is connected to the PLC processor (6), and a wiring terminal 1 (8), a wiring terminal 2 (9) and a wiring terminal 3 (10) are also arranged inside the relay protection box (1), and the wiring terminal 2 (9) is connected to the transformer substation conductor (3). The relay protection box (1) is arranged at the leftmost side inside, the terminal three (10) and the terminal one (8) are respectively located at the front and rear parts of the right side of the terminal two (9), the right side of the terminal two (9) is movably connected to a movable conductive rod (11) through a pin shaft, the movable conductive rod (11) is located between the terminal three (10) and the terminal one (8), and an electric control switching mechanism is arranged on the right side of the movable conductive rod (11), the battery assembly (7) is electrically connected to the current detector (5), the PLC processor (6), and the electric control switching mechanism, the terminal two (9) and the terminal three (10) are connected to the battery assembly (7) through a wire, and the terminal one (8) and the terminal two (9) are connected to the transformer substation wire (3).

2. A relay protection device for a substation according to claim 1, characterized in that: An alarm (15) is provided on the upper surface of the relay protection box (1), and the alarm (15) is connected in series between the third terminal (10) and the battery assembly (7).

3. A relay protection device for a substation according to claim 2, characterized in that: The alarm (15) is an alarm indicator light or an alarm speaker.

4. A relay protection device for a substation according to claim 1, characterized in that: The relay protection box (1) and the collection box (2) are both made of insulating plastic material.

5. A relay protection device for a substation according to claim 1, characterized in that: The wiring terminal one (8), the wiring terminal two (9), the wiring terminal three (10) and the movable conductive rod (11) are all made of copper.

6. A relay protection device for a substation according to claim 1, characterized in that: The electric control switching mechanism comprises an armature (12) connected to the right end of a movable conductive rod (11), an electromagnet (13) arranged at the rear side of the armature (12), and a return spring (14) connected to the front side of the armature (12); the front end of the return spring (14) is connected to the front side of the inner wall of the relay protection box (1); and the electromagnet (13) is connected to the signal output end of the PLC processor (6).

7. A relay protection device for a substation according to claim 6, characterized in that: The armature (12) is in the shape of a circular ring and is sleeved on the right end of the movable conductive rod (11).

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