TWM591169U - Current monitoring apparatus - Google Patents

Abstract

The present invention discloses a transformer internal fault current monitoring device. The transformer includes a transformer core, a transformer clip and a casing disposed outside the transformer core. The current monitoring device includes: a device body, an input/output terminal set provided on the device body, and a first , A second current detection unit and a processing unit. The input terminal set can be used to connect the core of the transformer and the ground loop of the core, as well as to connect the clamp and the ground loop of the clamp. The output terminal set can be used to ground the core ground loop and the clamp ground loop. The first current detection unit and the second current detection unit are respectively used to measure the ground current of the clip and the core ground current. The processing unit is used to execute an algorithm to determine whether there is a problem of overcurrent in the transformer and the location of the abnormality.

Description

Current monitoring device

This creation relates to a transformer internal fault current monitoring device, especially a current monitoring device that detects the ground current of a transformer, then determines whether the transformer is abnormal, and issues a warning when the transformer is abnormal, and outputs the abnormal current value.

According to the press, the transformer is an important device in the transmission and distribution or power supply system. If a fault occurs, the power supply will be interrupted, causing public safety problems and loss of personnel and equipment. The current transformer detection methods include gas analysis in oil, partial discharge detection, ultrasonic detection methods, and detection of whether the transformer core has multi-point grounding, but when the transformer core has multi-point grounding, the management personnel has no way of knowing, Failure to make immediate emergency treatment often causes the temperature of the transformer core to rise and be damaged. Therefore, how to solve the above-mentioned problems is the subject that the relevant industry in this industry urgently wants to study.

The main purpose of this creation is to use the current monitoring device to connect the transformer core of the transformer and the ground loop of the transformer clamp, so that the current monitoring device detects the abnormality of the ground loop current of the transformer core or transformer clamp by outputting the input and output terminal groups. Abnormal signals and abnormal information are output, so that managers can know immediately, and then make effective treatment to minimize transformer damage.

The secondary purpose of this creation is to compare and detect the numerical relationship between the current value of the ground loop of the transformer core and the transformer clamp using the current monitoring device, so that the current monitoring device can determine the location of the abnormality.

The technical problem to be solved by this creation is to provide a transformer internal fault current monitoring device for the deficiencies of the prior art. The transformer includes a transformer core, a transformer clip disposed outside the transformer core, and a transformer core surrounding the transformer core With the housing of the transformer clamp, the current monitoring device includes: a device body, an input terminal group, an output terminal group, a first current detection unit, a second current detection unit, and a processing unit, Wherein, the input terminal group, the output terminal group, the first current detection unit, the second current detection unit and the processing unit are all disposed on the device body. The input terminal group includes a ground current connection terminal group, which is used to connect the transformer iron core of the transformer and the iron core ground loop, and connect the transformer clamp and clamp ground loop of the transformer. The output terminal group includes a ground loop connection terminal group for grounding the core ground loop and the clamp ground loop. The first current detection unit is electrically coupled to the grounding loop of the clip to measure the grounding current of the clamp, and the second current detection unit is electrically coupled to the grounding loop of the core to measure the grounding of the core Current. The processing unit is electrically coupled to the first current detection unit, the second current detection unit and the output terminal group, and is used to execute an algorithm to determine whether there is an overcurrent problem in the transformer And the location where the exception occurred.

One of the beneficial effects of this creation is that the current monitoring device provided by this creation can determine whether there is an overcurrent problem and an abnormal location inside the transformer through an algorithm.

In order to further understand the characteristics and technical content of this creation, please refer to the following detailed description and drawings of this creation. However, the drawings provided are for reference and explanation only, and are not intended to limit this creation.

1‧‧‧Current monitoring device

2‧‧‧Transformer

20‧‧‧Transformer core

21‧‧‧Transformer clip

22‧‧‧Housing

3‧‧‧Body

4‧‧‧Input terminal group

5‧‧‧Output terminal group

6‧‧‧First current detection unit

7‧‧‧ Second current detection unit

8‧‧‧Processing unit

9‧‧‧External power supply

10‧‧‧Control unit

11‧‧‧Clamp ground loop

12‧‧‧Core ground loop

111‧‧‧The first light interruption detector

121‧‧‧Second light blocking detector

112‧‧‧ First temperature detection unit

122‧‧‧Second temperature detection unit

81‧‧‧Warning unit

82‧‧‧Storage unit

83‧‧‧Display unit

II‧‧‧Region

FIG. 1 is a schematic diagram of the device arrangement of the first embodiment of creation.

FIG. 2 is an enlarged schematic view of part II of FIG. 1.

The following is a specific specific example to illustrate the implementation of the "current monitoring device" disclosed in this creation. Those skilled in the art can understand the advantages and effects of this creation from the content disclosed in this specification. This creation can be implemented or applied through other different specific embodiments. The details in this specification can also be based on different views and applications, and various modifications and changes can be made without departing from the concept of this creation. In addition, the drawings in this creation are only a schematic illustration, not based on actual size, and are declared in advance. The following embodiments will further describe the relevant technical content of the creation, but the disclosed content is not intended to limit the protection scope of the creation.

It should be understood that although terms such as “first”, “second”, and “third” may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" as used herein may include any combination of any one or more of the associated listed items, depending on the actual situation.

[First embodiment]

Referring to FIGS. 1 to 2, the first embodiment of the present invention provides a current monitoring device 1 including: a device body 3, an input terminal group 4, an output terminal group 5, a first current detection unit 6, a second current detection Unit 7, processing unit 8 and external power supply 9. The input terminal group 4, the output terminal group 5, the first current detection unit 6, the second current detection unit 7 and the processing unit 8 are all disposed on the device body 3. The input terminal group 4 includes a ground current connection terminal group 41 for connecting the transformer core 20 of the transformer 2 and the core ground loop 12 and the transformer clamp 21 and the clamp ground loop 11 of the transformer 2. The output terminal group 5 includes a ground loop connection terminal group 51 for connecting the core ground loop 12 And the clip ground loop 11 is grounded. The first current detection unit 6 is electrically coupled to the clip ground loop 11 for measuring the ground current of the clip, and the second current detection unit 7 is electrically coupled to the core ground loop 12 for measuring the core ground current . The processing unit 8 is electrically coupled to the output terminal group 5, the first current detection unit 6, and the second current detection unit 7, and is used to execute an algorithm according to the ground current value of the clip and the core ground current value The numerical relationship between them determines whether there is a problem of overcurrent in the transformer, and further determines whether the overcurrent abnormality occurs between the transformer clamp 21 and the transformer core 20, between the transformer core 20 and the casing 22, or between the transformer clamp 21 and Between the shells 22.

In implementation, the device body 3 may be a printed circuit board, and the clip ground loop 11 and the core ground loop 12 may be two wires independent of the printed circuit board, respectively grounding the transformer clip 21 and the transformer core 20 of the transformer In this way, neither the grounding current of the clip nor the grounding current of the core will pass through the printed circuit board, but the thermal load of the printed circuit board can be reduced.

Among them, the external power supply 9 is electrically connected to the device body 3 to provide power required for the operation of the current monitoring device 1.

Preferably, the device body 3 is further provided with an alarm unit. The alarm unit has a warning lamp for abnormal ground current, a warning lamp for abnormal operation and a power indicator lamp. When an overcurrent abnormality occurs, the processing unit 8 controls the alarm unit to issue an alarm message based on the location of the abnormality. The grounding current abnormality warning lamp of the alarm unit will light up, and the abnormality information output terminal outputs the alarm message to the control unit 10, allowing the management personnel to remove You can instantly know that there is overcurrent in the transformer, and you can also know the location of the abnormality, and then make effective treatment.

When the processing unit 8 determines that the numerical relationship is that the first grounding current value is much greater than the product of the first grounding current value and the second grounding current value, the control alarm unit sends a first alarm message to indicate that the overcurrent abnormality occurs in Between the transformer clamp and the housing.

Preferably, the device body 3 is further provided with a first light-blocking detector 111 and is electrically connected to the processing unit 8. Among them, the first light interruption detector 111 includes a A first optical transmitter of the optical signal and a first optical receiver for receiving the first optical signal, and the clip ground loop 11 is disposed on the optical path of the first optical signal; During the period of the clip's ground current value, the processing unit 8 further determines whether the first optical signal is blocked by the clip's ground loop 11; wherein, if the first optical signal is not blocked by the clip's ground loop 11, it indicates that the clip is grounded If the loop 11 is not correctly connected, the processing unit 8 controls the alarm unit to issue a second alarm message.

Preferably, the device body 3 is further provided with a first temperature detection unit 112 for detecting the temperature of the region on the device body 3 closest to the core ground loop 12 and electrically connected to the processing unit 8; wherein, the processing unit 8. Further determine whether the temperature of the area closest to the core ground loop 12 on the device body 3 is greater than the first warning value; wherein, if the temperature of the area closest to the core ground loop 12 on the device body 3 is greater than the first warning value , The processing unit 8 controls the alarm unit to issue a third alarm message.

Preferably, a second light-blocking detector 121 is also provided on the device body 3 and electrically connected to the processing unit 8. Wherein, the second light interruption detector 121 includes a second light transmitter for emitting a second light signal, and a second light receiver for receiving the second light signal, and the core ground loop 12 is disposed in the The optical path of the second optical signal. During the period of detecting the core ground current value, the processing unit 8 further determines whether the second optical signal is blocked by the core ground loop 12. Wherein, if the second optical signal is not blocked by the core ground loop 12, indicating that the core ground loop 12 is not properly connected, the processing unit 8 controls the alarm unit to issue a fourth alarm message.

Preferably, the device body 3 is further provided with a second temperature detection unit 122 for detecting the temperature of the area on the device body 3 closest to the core ground loop 12 and electrically connected to the processing unit 8. The processing unit 8 further determines whether the temperature of the area closest to the core ground loop 12 on the device body 3 is greater than the second warning value; wherein, if the temperature of the area closest to the core ground loop 12 on the device body 3 is greater than the second warning value , The processing unit 8 controls the alarm ticket Yuan issued a fifth warning message.

Preferably, the device body 3 is further provided with a storage unit 82, and the storage unit 82 is electrically coupled to the processing unit 8 for storing the measured core grounding current value and the clamp grounding current value, so as to provide the manager with the core grounding Record of changes in current value and ground current value of the clamp.

Preferably, the device body 3 is further provided with a display unit 83 for displaying the core grounding current value, the clamp grounding current value and the alarm information.

Preferably, the current monitoring device 1 further includes a warning unit 81. The warning unit 81 may be a warning light or the like, however, this creation is not limited to the examples mentioned above. The warning unit 81 is connected to the abnormal signal output terminal. When the warning unit 81 receives the circuit abnormal signal, the warning unit 81 will start to warn the management personnel.

Preferably, the device body 3 further includes a casing, wherein the casing is provided with an outer cover, and a fixing element is provided on the outer cover. The fixing element is fixed to the casing so that the outer cover is shielded from the input terminal group 4 and the output terminal group 5. This can reduce the accumulation of dust in the external environment in the input terminal group 4 and the output terminal group 5

The above-mentioned embodiments are only for the convenience of describing this creation, not for limitation. Without departing from the scope of this creative spirit, various simple changes and modifications that can be made by those skilled in this industry should still be included in the following patent applications In scope.

[Beneficial effect of embodiment]

One of the beneficial effects of this creation is that the current monitoring device 1 provided by this creation can determine whether there is an overcurrent problem in the transformer according to the numerical relationship between the ground current value of the clamp and the core ground current value, and further It is determined that the overcurrent abnormality occurs between the transformer clamp 21 and the transformer core 20, between the transformer core 20 and the housing 22, or between the transformer clamp 21 and the housing 22.

Furthermore, the current monitoring device 1 provided by the author can Information, issue a warning to the management personnel, and can provide the management personnel with a record of changes in the core grounding current value and clamp grounding current value, as an important reference for maintaining transformers.

The content disclosed above is only a preferred and feasible embodiment of this creation, and does not limit the scope of the patent application for this creation, so any equivalent technical changes made by using this creation specification and graphic content are included in this creation application Within the scope of the patent.

20‧‧‧Transformer core

21‧‧‧Transformer clip

3‧‧‧Body

4‧‧‧Input terminal group

5‧‧‧Output terminal group

6‧‧‧First current detection unit

7‧‧‧ Second current detection unit

8‧‧‧Processing unit

9‧‧‧External power supply

10‧‧‧Control unit

11‧‧‧Clamp ground loop

12‧‧‧Core ground loop

111‧‧‧The first light interruption detector

121‧‧‧Second light blocking detector

112‧‧‧ First temperature detection unit

122‧‧‧Second temperature detection unit

81‧‧‧Warning unit

82‧‧‧Storage unit

83‧‧‧Display unit

Claims (10)

An internal fault current monitoring device for a transformer. The transformer includes a transformer core, a transformer clip disposed outside the transformer core, and a casing surrounding the transformer core and the transformer clip. The current monitoring device includes : A device body; an input terminal set, which is arranged on the device body, and includes: a ground current connection terminal set, used to connect the transformer core of the transformer and the core ground loop, and the transformer clamp and clamp connected to the transformer A ground loop; an output terminal set, which is provided on the device body, and includes: a ground loop connecting terminal set for grounding the core ground loop and the clamp ground loop; a first current detection unit, which is provided at The device body is electrically coupled to the grounding circuit of the clip to measure the ground current of the clip and output a ground current value of the clip; a second current detection unit is disposed on the device body , And is electrically coupled to the core ground loop to measure the core ground current and output a core ground current value; a processing unit, which is disposed on the device body and electrically coupled to the first current detector The measuring unit, the second current detecting unit and the output terminal group are used to determine whether the overcurrent problem and abnormal location occur inside the transformer. The current monitoring device as described in item 1 of the scope of the patent application further includes: an alarm unit, which is arranged on the device body and used to issue an alarm message. The current monitoring device as described in item 1 of the scope of the patent application further includes: a first light interruption detector, which is disposed on the device body and includes: a first light emitter for emitting a First optical signal; and A first optical receiver for detecting the first optical signal and electrically coupled to the processing unit; and a second optical interruption detector, which is disposed on the device body and includes: A second optical transmitter for transmitting a second optical signal; and a second optical receiver for detecting the second optical signal and electrically coupled to the processing unit; wherein, the first A light interruption detector detects whether the first light signal is blocked to determine whether the line of the clip ground loop is connected; wherein, the second light interruption detector detects Whether the second optical signal is blocked to determine whether the line of the core ground loop is connected. The current monitoring device as described in item 1 of the patent scope further includes: a first temperature detection unit, which is disposed on the device body and electrically coupled to the processing unit for detecting the device The temperature of the closest area between the body and the ground loop of the clip; and a second temperature detection unit, which is disposed on the device body and electrically coupled to the processing unit, for detecting the device body and the core ground The temperature of the closest area of the circuit. The current monitoring device as described in item 1 of the scope of the patent application further includes: an external power supply, the external power supply is electrically coupled to the device body, and is used to provide power required for the operation of the current monitoring device. The current monitoring device as described in item 1 of the scope of the patent application further includes: a storage unit disposed on the device body and electrically coupled to the processing unit for storing the core ground current value And the ground current value of the clip. The current monitoring device as described in item 2 of the patent application scope further includes: a display unit, which is provided on the device body and used for displaying the core grounding current value, the clamp grounding current value and the The alarm message is described. The current monitoring device as described in item 1 of the patent application scope, wherein the output The terminal group further includes: an abnormal information output terminal and an abnormal signal output terminal; wherein, when the processing unit determines that an overcurrent occurs in the transformer, the abnormal information output terminal outputs an alarm signal, the abnormal signal The output terminal outputs the primary circuit abnormal signal. The current monitoring device according to item 8 of the patent application scope further includes: a warning unit, including a warning light; wherein, the warning unit is connected to the abnormal signal output terminal, and the warning unit receives the Start when the circuit is abnormal. The current monitoring device according to item 1 of the patent application scope, wherein the device body further comprises: a housing, an outer cover is provided on the housing, a fixing element is provided on the outer cover, and the fixing element It is fixed to the housing so that the outer cover is shielded from the input terminal group and the output terminal group.

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