CN115932697A - Comprehensive evaluation method and device for capacitive voltage transformer - Google Patents

Abstract

The invention relates to the technical field of electrical detection equipment, in particular to a comprehensive evaluation method and device for a capacitive voltage transformer, including a machine casing, a detection mechanism is fixedly installed inside the machine casing, and wiring is installed inside the machine casing mechanism, the wiring mechanism includes a mounting frame fixedly installed inside the casing, a control mechanism is mounted on the top of the mounting frame, and a storage mechanism is mounted inside the mounting frame. In the present invention, through the setting of the storage mechanism, the cable used for wiring can be conveniently stored and detected inside the device, and since the connection between the cable and the power plug will remain in a fixed state when the cable is stretched, it also reduces the In the event of damage, the cable is effectively protected, and there is no need to store and store it separately after each test, which also improves the convenience of testing and evaluating the voltage transformer.

Description

A comprehensive evaluation method and device for a capacitive voltage transformer

technical field

The invention relates to the technical field of electrical testing equipment, in particular to a comprehensive evaluation method and device for a capacitive voltage transformer.

Background technique

Capacitive voltage transformers are divided by series capacitors, and then stepped down and isolated by electromagnetic transformers. As a voltage transformer for meters, relay protection, etc., the carrier frequency can be coupled to the transmission line for long-distance communication. , remote measurement, selective line high-frequency protection, remote control, teletype, etc. Therefore, compared with conventional electromagnetic voltage transformers, capacitive voltage transformers can prevent ferromagnetic resonance caused by voltage transformer core saturation In addition, there are many advantages in terms of economy and safety, but because it is often set in the external environment, it will also be affected by the external environment when used, so when the voltage transformer is used for a long time, it needs to pass the inspection frequently. The equipment detects its use data, and then evaluates its performance by evaluating the equipment to determine whether the voltage transformer needs to be repaired or replaced.

However, in the process of collecting data through detection equipment, the existing comprehensive evaluation device for capacitive voltage transformer often needs to connect and energize the voltage transformer through multiple connecting cables to complete the detection of the data of the voltage transformer, thereby To conduct a comprehensive evaluation, but before and after each test, the cables need to be stored, taken and carried separately, but directly placing the cables inside the test device will easily cause the cables to be entangled and squeezed, not only It is easy to cause damage to the cable, and it will also affect the cleanliness inside the testing device, which makes it inconvenient for the staff to test and evaluate the voltage transformer every time.

Therefore, a comprehensive evaluation method and device for capacitive voltage transformers are proposed.

Contents of the invention

The purpose of the present invention is to provide a comprehensive evaluation method and device for capacitive voltage transformers, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A comprehensive evaluation device for a capacitive voltage transformer, comprising a machine casing, a detection mechanism is fixedly installed inside the machine casing, a wiring mechanism is installed inside the machine casing, and the wiring mechanism includes a The installation frame, the top of the installation frame is equipped with a control mechanism, the inside of the installation frame is installed with a storage mechanism, the storage mechanism includes a number of storage boxes that are movably installed inside the installation frame, and the control mechanism includes A number of chutes on the top of the frame, the inside of the chute is slidably installed with an L-shaped plate, the top of the L-shaped plate is threaded with a threaded column, the top of the L-shaped plate is slidably installed with a control panel, and the control panel The bottom of the L-shaped plate is rotatably installed with a connecting bar, and the inside of the L-shaped plate is slidably installed with elastic latches. The bottom of the connecting bar is rotatably connected with the top of the elastic latches. The elastic locking teeth are flexibly connected to the ratchet rack, and the bottom end of the threaded post passes through the installation frame and extends to the inside of the storage box.

Preferably, a slide plate is slidably installed inside the storage box, and a fixed wheel is installed rotatably inside the storage box. One side of the slide plate is fixedly installed with a No. 1 spring, and one side of the No. 1 spring is connected The inner wall of the box is fixedly connected.

Preferably, a moving wheel is rotatably installed on one side of the sliding plate, and the same cable is wound on the outer surfaces of the fixed wheel and the moving wheel.

Preferably, one side inside the storage box is fixedly installed with an electrical plug, the other side inside the storage box is movably installed with an electrical connection clip, and a No. 2 spring is fixedly installed between the storage box and the installation frame.

Preferably, one end of the cable is fixedly connected to the power plug, and the other end of the cable is fixedly connected to the power clip.

Preferably, a power plug board is fixedly installed inside the installation frame, and one side of the power plug board is movably connected to the power plug.

Preferably, one side of the installation frame extends to the outside of the machine casing, a cover plate is rotatably installed on one side of the installation frame, a clamping plate is rotatably installed on one side of the machine housing, and the inner surface of the clamping plate It is movably connected with the outer surface of the cover plate.

A comprehensive evaluation method for a capacitive voltage transformer, the comprehensive evaluation method for a capacitive voltage transformer includes the above-mentioned comprehensive evaluation device for a capacitive voltage transformer, specifically comprising the following steps:

S1. Obtain the inherent information of the voltage transformer, which includes one or more of equipment information, factory information, maintenance information, and appearance;

S2. Obtain the operation information of the voltage transformer through the comprehensive evaluation device of the capacitive voltage transformer and other testing equipment, such as the capacitance of the capacitor voltage divider, the temperature rise, the operating sound, the condition of the external insulation surface of the capacitor, and the corrosion of the base one or more;

S3. According to the comparison between the inherent information and the big data information of the voltage transformer, the initial state evaluation result of the voltage transformer is obtained, and the online state evaluation result of the voltage transformer is obtained according to the comparison between the operation information and the big data information of the voltage transformer. According to the initial state evaluation result Make a comparison table with the initial state evaluation results of this type of voltage transformer extracted online, and make a comparison table based on the online state evaluation results and the online state evaluation results of this type of voltage transformer extracted online;

S4, the score value of the comprehensive evaluation result calculates the membership function value, then calculates the weight of the comprehensive index, and finally obtains the state evaluation score of the voltage transformer through the evaluation algorithm;

S5. If it is determined that the status evaluation score of the voltage transformer is unqualified, an alarm command is sent to the comprehensive evaluation device of the capacitor voltage transformer, and the internal components of the comprehensive evaluation device of the capacitor voltage transformer will generate an alarm.

Compared with prior art, the beneficial effect of the present invention is:

1. Through the setting of the storage mechanism, the cables used for wiring can be conveniently stored and detected inside the device, and because the connection between the cable and the power plug will remain fixed when the cable is stretched, it also reduces In the event of damage, the cable is effectively protected, and there is no need to store and store it separately after each test, which also improves the convenience of testing and evaluating the voltage transformer.

2. Through the setting of the control mechanism, each storage mechanism can be easily and quickly taken out and installed from the inside of the detection device, so that the detection device can be applied to different use environments, and at the same time, when the cables inside the storage device are damaged, , which is convenient for replacement, and also ensures the stability of the storage device after installation.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

2 is a schematic diagram of the overall structure of the wiring mechanism of the present invention;

Fig. 3 is a schematic diagram of the internal structure of the wiring mechanism of the present invention;

Figure 4 is an enlarged view of the structure at A in Figure 2;

FIG. 5 is an enlarged view of the structure at B in FIG. 3 .

In the figure: 1. machine shell; 2. detection mechanism; 3. wiring mechanism; 4. installation frame; 5. clamping plate; 6. control mechanism; 7. storage mechanism; 8. storage box; L-shaped plate; 11, threaded column; 12, control panel; 13, connecting bar; 14, elastic locking teeth; 15, ratchet rack; 16, sliding plate; 17, fixed wheel; 18, moving wheel; 19, cable ; 20, electric plug; 21, electric clip; 22, electric socket; 23, cover plate; 24, No. 1 spring; 25, No. 2 spring.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Straight", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be It can be directly connected, or indirectly connected through an intermediary, or it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Please refer to Fig. 1 to Fig. 5, the present invention provides a kind of comprehensive evaluation method and device of capacitive voltage transformer, technical scheme is as follows:

A comprehensive evaluation device for a capacitive voltage transformer, comprising a machine casing 1, a detection mechanism 2 is fixedly installed inside the machine casing 1, the detection mechanism 2 is electrically connected to an external power supply, and is controlled by an external PLC programming program, and the machine casing 1 A wiring mechanism 3 is installed inside the wiring mechanism 3. The wiring mechanism 3 includes an installation frame 4 fixedly installed inside the machine casing 1. A control mechanism 6 is installed on the top of the installation frame 4. A storage mechanism 7 is installed inside the installation frame 4. The storage mechanism 7 includes A number of storage boxes 8 are movably installed inside the installation frame 4. The control mechanism 6 includes a number of chutes 9 opened on the top of the installation frame 4. The inside of the chute 9 is slidably installed with an L-shaped plate 10, and the top of the L-shaped plate 10 is threaded. Threaded column 11 is arranged, and threaded column 11 is partly provided with the rotating shaft of screw thread, and the top of L-shaped plate 10 is slidingly installed with control panel 12, and the bottom of control panel 12 is rotatably installed with connecting bar 13, and the inside of L-shaped plate 10 is slidably installed with Elastic locking tooth 14, elastic locking tooth 14 can be returned after being compressed by ratchet bar 15, the bottom of connecting bar 13 is connected with the top of elastic locking tooth 14 in rotation, the inside of chute 9 is fixedly equipped with ratchet tooth bar 15, elastic locking tooth The teeth 14 are flexibly connected to the ratchet rack 15, and the bottom end of the threaded column 11 penetrates the installation frame 4 and extends to the inside of the storage box 8;

In the initial state, the bottom end of the threaded column 11 is inserted into the interior of the storage box 8, and the elastic locking teeth 14 and the ratchet bar 15 are engaged with each other, and the storage box 8 is in a fixed state inside the installation frame 4 through the L-shaped plate 10 , turn the threaded column 11, the threaded column 11 moves upwards, and at the same time it will also drive the control board 12 to move at the same time, the control board 12 pulls the elastic latch 14 to the direction away from the ratchet bar 15 through the connecting bar 13, and pushes the storage box 8 out for installation Inside the frame 4, the storage box 8 can be taken out. When installing a new storage box 8, push the storage box 8 to the inside of the installation frame 4. When the storage box 8 reaches the L-shaped plate 10, turn the threaded column 11, Make the threaded column 11 move downwards and insert it into the storage box 8, the control board 12 will also make the elastic latch 14 contact with the ratchet bar 15 again through the connecting bar 13, and then the threaded column 11 can be pushed to make the The L-shaped plate 10 drives the storage box 8 to retract to the inside of the installation frame 4, and the elastic locking teeth 14 cooperate with the ratchet rack 15, so that the installed storage box 8 is fixed.

As an embodiment of the present invention, with reference to Fig. 3, the inside of storage box 8 is slidably installed with slide plate 16, the inside of storage box 8 is rotatably installed with fixed wheel 17, and one side of slide plate 16 is fixedly installed with No. 1 spring 24, One side of the No. 1 spring 24 is fixedly connected with the inner wall of the storage box 8, and one side of the sliding plate 16 is rotatably equipped with a moving wheel 18, and the outer surfaces of the fixed wheel 17 and the moving wheel 18 are wound with the same cable 19, and the storage box 8 One side of the interior is fixedly installed with a power connection plug 20, and the other side of the storage box 8 is movably installed with a power connection clip 21, and a No. 2 spring 25 is fixedly installed between the storage box 8 and the installation frame 4, and one end of the cable 19 It is fixedly connected with the power plug 20, and the other end of the cable 19 is fixedly connected with the power connection clip 21. The inside of the installation frame 4 is fixedly installed with a power connection board 22, and the connection between the power connection board 22 and the detection mechanism 2 Electrically connected between one side of the power plug board 22 and the power plug 20, the power plug board 22 is electrically connected when the power plug 20 is connected, and one side of the installation frame 4 extends to the machine shell 1, one side of the mounting frame 4 is rotatably installed with a cover plate 23, and one side of the machine housing 1 is rotatably installed with a clamping plate 5, and the inner surface of the clamping plate 5 is movably connected with the outer surface of the cover plate 23;

Rotate the clamping plate 5, open the cover plate 23, and pull the connecting clip 21 out of the storage box 8. When the connecting clip 21 is pulled out, the cable 19 wound on the fixed wheel 17 and the moving wheel 18 will be driven to move. , so that the sliding plate 16 is pulled, the No. 1 spring 24 is compressed, the cable 19 is drawn out of the storage box 8, and the connection clamp 21 is connected to the voltage transformer, and then the internal detection mechanism 2 is connected. External power supply, then start the detection mechanism 2, the detection mechanism 2 is energized to the cable 19 through the power connection board 22 and the power connection plug 20, and the detection mechanism 2 can detect the voltage transformer through the power connection clip 21, when the detection is completed , take off the connecting clip 21 , the No. 1 spring 24 pushes the sliding plate 16 back to its original position, so that the cable 19 is re-stored inside the storage box 8 .

A comprehensive evaluation method for a capacitive voltage transformer, the comprehensive evaluation method for a capacitive voltage transformer includes the above-mentioned comprehensive evaluation device for a capacitive voltage transformer, specifically comprising the following steps:

S1. Obtain the inherent information of the voltage transformer, which includes one or more of equipment information, repair and maintenance information, appearance, and environmental conditions;

S2. Obtain the operation information of the voltage transformer through the comprehensive evaluation device of the capacitor voltage transformer and other testing equipment. The operation information includes the capacitance of the capacitor voltage divider, temperature rise, operation sound, the condition of the external insulation surface of the capacitor, and the corrosion of the base one or more of

S3. According to the comparison between the inherent information and the big data information of the voltage transformer, the initial state evaluation result of the voltage transformer is obtained, and the online state evaluation result of the voltage transformer is obtained according to the comparison between the operation information and the big data information of the voltage transformer. According to the initial state evaluation result Make a comparison table with the initial state evaluation results of this type of voltage transformer extracted online, and make a comparison table based on the online state evaluation results and the online state evaluation results of this type of voltage transformer extracted online;

S4, the score value of the comprehensive evaluation result calculates the membership function value, then calculates the weight of the comprehensive index, and finally obtains the state evaluation score of the voltage transformer through the evaluation algorithm;

S5. If it is determined that the status evaluation score of the voltage transformer is unqualified, an alarm command is sent to the comprehensive evaluation device of the capacitor voltage transformer, and the internal components of the comprehensive evaluation device of the capacitor voltage transformer will generate an alarm.

Based on the above embodiment, the membership function value is calculated from the score value of the comprehensive evaluation result, and then the comprehensive index weight is calculated, and finally the state evaluation score of the voltage transformer is obtained through the evaluation algorithm. The scoring formula is as follows:

Compute the membership function values:

The above μ(Xa) represents the membership function value of the score value of the a-th evaluation result, Xa represents the score value of the a-th evaluation category of the detected voltage transformer, and Xmax represents the maximum of all comprehensive scores in the a-th evaluation category value, Xmin represents the minimum value of the comprehensive score in the ath evaluation category;

Calculate the weight in the composite index:

The above Wa represents the weight of the a-th comprehensive index in all comprehensive indicators, _Pa is the proportion of the a-th score of the tested voltage transformer in the overall score, and Pa is the proportion of the a-th score in the evaluation category.

Evaluation algorithm:

The above D is the state evaluation score, which is compared with the evaluation score of this type of voltage transformer extracted online. When D is greater than or equal to the evaluation score of this type of voltage transformer extracted online, the detected voltage transformer, when D If it is less than the evaluation score of this type of voltage transformer extracted online, it is unqualified.

Working principle: When the voltage transformer needs to be detected, turn the clamping plate 5, open the cover plate 23, and pull the connecting clip 21 out of the storage box 8. During the process of pulling out the connecting clip 21, the fixed wheel 17 will be driven and the cable 19 wound on the moving wheel 18 to move, so that the sliding plate 16 is pulled, the No. 1 spring 24 is compressed, and the cable 19 is pulled out of the inside of the storage box 8, so that the connection clip 21 and the voltage transformer can be connected Then connect the internal detection mechanism 2 to the external power supply, and then start the detection mechanism 2. The detection mechanism 2 energizes the cable 19 through the power connection board 22 and the power connection plug 20, and the detection mechanism 2 can be activated by the power connection clip 21. To detect the voltage transformer, when the detection is completed, remove the connecting clip 21, the No. 1 spring 24 pushes the sliding plate 16 back to the original position, so that the cable 19 is re-stored inside the storage box 8, and the detection mechanism 2 will The detected data is classified and counted, and the evaluation is completed by comparing with the inherent information of the pressure transformer. In the initial state, the bottom end of the threaded column 11 is inserted into the storage box 8, and the elastic locking teeth 14 and The ratchet bars 15 are engaged with each other, and the storage box 8 is in a fixed state inside the installation frame 4 through the L-shaped plate 10. When it is necessary to replace different interfaces and new cables 19, turn the threaded column 11, and the threaded column 11 moves upward, and at the same time it will drive the control board 12 to move simultaneously. The control board 12 pulls the elastic latch 14 to the direction away from the ratchet bar 15 through the connecting bar 13, and the second spring 25 pushes the L-shaped plate 10, and the storage box 8 Push out the inside of the installation frame 4, and also disconnect the connection between the power plug 20 and the power socket 22, and then the storage box 8 can be taken out. Push, when the storage box 8 reaches the L-shaped plate 10, turn the threaded column 11 to move the threaded column 11 downwards and insert it into the storage box 8, the control board 12 will also make the elastic latch 14 reconnect with the connecting strip 13 The ratchet bars 15 are in contact with each other, and then the L-shaped plate 10 can drive the storage box 8 to retract the inside of the installation frame 4 by pushing the threaded column 11, and the elastic locking teeth 14 will cooperate with the ratchet bars 15, After the installed storage box 8 is fixed, the power connection plug 20 will also be inserted into the power connection board 22 .

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. The utility model provides a comprehensive evaluation device of capacitive voltage transformer, includes shell (1), the inside fixed mounting of shell (1) has detection mechanism (2), its characterized in that: the wiring mechanism (3) is installed inside the shell (1), the wiring mechanism (3) comprises an installation frame (4) fixedly installed inside the shell (1), a control mechanism (6) is installed at the top of the installation frame (4), a storage mechanism (7) is installed inside the installation frame (4), and the storage mechanism (7) comprises a plurality of storage boxes (8) movably installed inside the installation frame (4);

control mechanism (6) are including offering a plurality of spouts (9) at installing frame (4) top, the inside slidable mounting of spout (9) has L template (10), threaded column (11) are installed to the top screw thread of L template (10), the top slidable mounting of L template (10) has control panel (12), the bottom of control panel (12) is rotated and is installed connecting strip (13), the inside slidable mounting of L template (10) has elasticity latch (14), the bottom of connecting strip (13) is rotated with the top of elasticity latch (14) and is connected, the inside fixed mounting of spout (9) has ratchet (15), swing joint between elasticity latch (14) and ratchet (15), the inside of installing frame (4) and extending to receiver (8) is run through to the bottom of threaded column (11).

2. The comprehensive evaluation device of the capacitive voltage transformer according to claim 1, wherein: the inside slidable mounting of receiver (8) has sliding plate (16), the inside rotation of receiver (8) installs tight pulley (17), one side fixed mounting of sliding plate (16) has spring (24), one side of spring (24) and the inner wall fixed connection of receiver (8).

3. The comprehensive evaluation device of the capacitor voltage transformer according to claim 2, wherein: one side of the sliding plate (16) is rotatably provided with a moving wheel (18), and the outer surfaces of the fixed wheel (17) and the moving wheel (18) are wound with the same cable (19).

4. The comprehensive evaluation device of the capacitive voltage transformer according to claim 1, wherein: receiver (8) inside one side fixed mounting connect electric plug (20), the inside opposite side movable mounting of receiver (8) connects electric clamp (21), fixed mounting has No. two spring (25) between receiver (8) and installing frame (4).

5. The comprehensive evaluation method and device of the capacitive voltage transformer according to claim 3, characterized in that: one end of the cable (19) is fixedly connected with the power connection plug (20), and the other end of the cable (19) is fixedly connected with the power connection clamp (21).

6. The comprehensive evaluation device of the capacitive voltage transformer according to claim 1, wherein: the inside fixed mounting of installing frame (4) connects electric picture peg (22), connect swing joint between one side of electric picture peg (22) and connect electric plug (20).

7. The comprehensive evaluation device of the capacitive voltage transformer according to claim 1, wherein: one side of installing frame (4) extends to the outside of outer casing (1), apron (23) are installed in one side rotation of installing frame (4), cardboard (5) are installed in one side rotation of outer casing (1), the internal surface of cardboard (5) and the surface swing joint of apron (23).

8. A comprehensive evaluation method of a capacitive voltage transformer, the comprehensive evaluation method of a capacitive voltage transformer comprising the comprehensive evaluation device of a capacitive voltage transformer according to any one of claims 1 to 7, characterized in that:

the method specifically comprises the following steps:

s1, obtaining inherent information of a voltage transformer, wherein the inherent information comprises one or more of equipment information, factory information, maintenance information and appearance;

s2, acquiring operation information of the voltage transformer through a comprehensive evaluation device and other detection equipment of the capacitive voltage transformer, wherein the operation information comprises one or more of capacitance, temperature rise, operation sound, the condition of the outer insulating surface of the capacitor and the condition of base corrosion of the capacitive voltage divider;

s3, obtaining an initial state evaluation result of the voltage transformer according to the comparison of the inherent information and the big data information of the voltage transformer, obtaining an online state evaluation result of the voltage transformer according to the comparison of the operation information and the big data information of the voltage transformer, making a comparison table according to the initial state evaluation result and the initial state evaluation result of the voltage transformer of the type extracted on line, and making a comparison table according to the online state evaluation result and the online state evaluation result of the voltage transformer of the type extracted on line;

s4, calculating a membership function value according to the evaluation value of the comprehensive evaluation result, then calculating the weight of the comprehensive index, and finally obtaining the state evaluation score of the voltage transformer through an evaluation algorithm;

and S5, if the state evaluation grade of the voltage transformer is judged to be unqualified, sending an alarm instruction to a comprehensive evaluation device of the capacitor voltage transformer, and giving an alarm to internal elements of the comprehensive evaluation device of the capacitor voltage transformer.

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