TWI468705B - Transformer monitoring device - Google Patents

Transformer monitoring device Download PDF

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Publication number
TWI468705B
TWI468705B TW101147963A TW101147963A TWI468705B TW I468705 B TWI468705 B TW I468705B TW 101147963 A TW101147963 A TW 101147963A TW 101147963 A TW101147963 A TW 101147963A TW I468705 B TWI468705 B TW I468705B
Authority
TW
Taiwan
Prior art keywords
current
microprocessor
monitoring
transformer
core
Prior art date
Application number
TW101147963A
Other languages
Chinese (zh)
Other versions
TW201425950A (en
Inventor
Chia Ching Lin
Ching Min Chen
Chia Shiang Yao
Original Assignee
Fortune Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fortune Electric Co Ltd filed Critical Fortune Electric Co Ltd
Priority to TW101147963A priority Critical patent/TWI468705B/en
Publication of TW201425950A publication Critical patent/TW201425950A/en
Application granted granted Critical
Publication of TWI468705B publication Critical patent/TWI468705B/en

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Description

Transformer monitoring device
A transformer monitoring device, especially a monitoring device for monitoring whether a core of a transformer is multi-point grounded.
According to the transformer, the transformer is an important equipment in the power transmission and distribution or power supply system. If a fault occurs, the power supply will be interrupted, causing public safety problems and personal equipment property loss. Currently, the transformer detection method includes oil gas analysis and partial discharge detection. , ultrasonic detection, etc., but there is no detection of multi-point grounding of the transformer core, so it is impossible to let the management know the first time when the iron core is grounded, and the emergency treatment often causes the iron core. The temperature rises and is damaged.
The main object of the present invention is to continuously connect to the transformer by using the monitoring device, so that the multi-point grounding of the iron core of the transformer can be immediately known to the management personnel, and then the effective treatment can be performed to minimize the damage of the core of the transformer. .
In order to achieve the above object, the transformer monitoring device of the present invention is used for detecting the grounding current of the core of the transformer. The outer side of the core of the transformer is provided with a clamping member, and an insulating material is arranged between the core and the clamping member, and the core is connected with the clamping member. In the grounding loop; the monitoring device has a microprocessor, the microprocessor is set with an abnormal current setting value, and the microprocessor is connected with an abnormal current detector and a warning device, and the abnormal current detector is used for detecting the iron core The current value on the ground loop is transmitted to the microprocessor, so that the microprocessor compares the current value detected by the abnormal current detector with the abnormal current set value, when the abnormal current detector detects The current value reaches the abnormal current setting value set by the microprocessor, and the microprocessor drives the alarm to operate.
Referring to the first and second figures, it can be clearly seen from the figure that the transformer monitoring device of the present invention comprises at least one transformer 1 having a core 11 and a clip 12 disposed outside the core 11 The core 11 and the clip 12 are provided with an insulating material 13 , and the core 11 and the clip 12 are connected to the ground circuit 14 .
a monitoring device 2, the monitoring device 2 has a microprocessor 21, the microprocessor 21 is set with an abnormal current setting value 211, and the microprocessor 21 is connected with an abnormal current detector 23, a current sensor 24, a display 25, and an alarm. The power supply 26, the power connector 27, and the transmission connector 28.
A current sensor 24 is connected between the microprocessor 21 and the abnormal current detector 23, and an electromagnetic switch 22 is connected between the two ends of the current sensor 24. The electromagnetic switch 22 is connected to the microprocessor 21, and the abnormal current is The detector 23 can be a current comparator for detecting a large current. The current sensor 24 can be connected in series by a resistor for detecting the use of the micro current. When the microprocessor 21 controls the electromagnetic switch 22 to be turned on, the core 11 The current on the grounding circuit 14 does not flow through the current sensor 24. When the microprocessor 21 controls the electromagnetic switch 22 to open, the current of the core 11 on the grounding circuit 14 flows through the current sensor 24, causing the current sensor 24 detects the current value of the core 11 on the ground loop 14 and transmits it to the microprocessor 21.
The aforementioned display 25 is controlled by the microprocessor 21, and the microprocessor 21 displays the received current value on the display 25.
The warning device 26 can be a light alarm or an audible alarm, and is controlled by the microprocessor 21, when the current value detected by the abnormal current detector 23 reaches the abnormal current setting value 211 set by the microprocessor 21, The microprocessor 21 drives the alert 26 to actuate, thereby alerting by light or sound.
The power connector 27 is connected to an external power source 3, which may be a mains, a primary battery or a secondary battery, for providing power required for monitoring the operation of the device 2.
The transmission connector 28 is connected to the controller 4, and the controller 4 is used by the user. The controller 4 can send a control signal to change the abnormal current setting value 211 set by the microprocessor 21, and When the current value detected by the abnormal current detector 23 reaches the abnormal current setting value 211 set by the microprocessor 21, the microprocessor 21 sends an abnormal signal to the controller 4 for the user to know immediately.
Referring to the second and third figures, it can be clearly seen from the figure that the electromagnetic switch 22 of the monitoring device 2 of the present invention maintains a normal state, and the abnormal current detector 23 continuously detects the core 11 in the ground loop. The current value on 14 and pass the current value It is sent to the microprocessor 21 for comparison. When the insulating material 13 functions normally, the current detected by the abnormal current detector 23 is lower than the abnormal current setting value 211 set by the microprocessor 21, and the microprocessor 21 does not perform other actions when the insulating material is used. 13 When the damaged portion 131 is generated, the iron core 11 and the grounding circuit 14 are grounded at multiple points (as indicated by the dotted arrow in the figure), and a clear current loop is generated, and the impedance is small, and a large current is generated, and the abnormal current is generated at this time. The current detected by the detector 23 is higher than the abnormal current setting value 211 set by the microprocessor 21. At this time, the microprocessor 21 controls the alarm 26 to be activated, and sounds or lights to issue a warning, and the micro processing The device 21 simultaneously transmits an abnormal signal to the controller 4, thereby allowing the user to properly maintain the transformer 1 in real time.
Furthermore, the microprocessor 21 is in a state where the current detected by the abnormal current detector 23 is lower than 1 amp or is lower than or close to the abnormal current set value 211 set by the microprocessor 21, and the microprocessor The timer 21 is timed to switch the electromagnetic switch 22 to be in an open state, so that the current of the core 11 on the grounding circuit 14 flows through the current sensor 24, causing the current sensor 24 to detect a relatively accurate current value, and the microprocessor 21 controls the display. 25 shows the current value.
1‧‧‧Transformer
11‧‧‧ iron core
12‧‧‧Clip pieces
13‧‧‧Insulation materials
131‧‧‧damage
14‧‧‧Ground circuit
2‧‧‧Monitoring device
21‧‧‧Microprocessor
211‧‧‧Abnormal current setting
22‧‧‧Electromagnetic switch
23‧‧‧Abnormal current detector
24‧‧‧ Current sensor
25‧‧‧ display
26‧‧‧ Warning device
27‧‧‧Power connector
28‧‧‧Transport connector
3‧‧‧External power supply
4‧‧‧ Controller
The first figure is a schematic diagram of the transformer of the present invention.
The second figure is a block diagram of the present invention.
The third figure is a schematic diagram of current flow when the core of the transformer of the invention exhibits multi-point grounding.
1‧‧‧Transformer
11‧‧‧ iron core
14‧‧‧Ground circuit
2‧‧‧Monitoring device
21‧‧‧Microprocessor
211‧‧‧Abnormal current setting
22‧‧‧Electromagnetic switch
23‧‧‧Abnormal current detector
24‧‧‧ Current sensor
25‧‧‧ display
26‧‧‧ Warning device
27‧‧‧Power connector
28‧‧‧Transport connector
3‧‧‧External power supply
4‧‧‧ Controller

Claims (6)

  1. A transformer monitoring device is used for detecting a grounding current of a core of a transformer. The outer side of the core of the transformer is provided with a clamping member, an insulating material is disposed between the core and the clamping member, and the core is connected with the clamping member. In the grounding loop; the monitoring device has a microprocessor, the microprocessor is set with an abnormal current setting value, and the microprocessor is connected with an abnormal current detector for detecting a large current, the abnormal current detector system The current value of the iron core is detected and transmitted to the microprocessor, so that the microprocessor detects the current value detected by the abnormal current detector and the abnormal current setting value. Comparing; the microprocessor of the monitoring device and the abnormal current detector are connected with a current sensor for detecting a micro current, and an electromagnetic switch is connected between the two ends of the current sensor, and the electromagnetic The switch is connected to the microprocessor. When the electromagnetic switch is turned on, the current of the iron core on the ground loop does not flow through the current inductor. When the electromagnetic switch is open, the iron core is connected to the ground loop. I.e., the current flows through the current sensor so that the sensor detecting the current to the core of the ground return path of the current value, and transmitted to the microprocessor.
  2. The transformer monitoring device of claim 1, wherein the microprocessor of the monitoring device is connected with an alarm, and the current value detected by the abnormal current detector reaches the setting of the microprocessor. The abnormal current setting value, the microprocessor drives the alarm to operate.
  3. The transformer monitoring device of claim 1, wherein the microprocessor of the monitoring device is lower than or close to the micro current detected by the abnormal current detector when the current is less than 1 ampere. The microprocessor periodically switches the electromagnetic switch to an open state in a state in which the abnormal current setting value is set by the processor.
  4. The transformer monitoring device of claim 1, wherein the microprocessor of the monitoring device is connected to a power connector, and the power connector is connected to an external power source.
  5. The transformer monitoring device of claim 1, wherein the microprocessor of the monitoring device is connected to a transmission connector, and the transmission connector is connected to the controller.
  6. The transformer monitoring device according to claim 1, wherein the supervisor The microprocessor of the measuring device is connected to the display.
TW101147963A 2012-12-18 2012-12-18 Transformer monitoring device TWI468705B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW101147963A TWI468705B (en) 2012-12-18 2012-12-18 Transformer monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW101147963A TWI468705B (en) 2012-12-18 2012-12-18 Transformer monitoring device

Publications (2)

Publication Number Publication Date
TW201425950A TW201425950A (en) 2014-07-01
TWI468705B true TWI468705B (en) 2015-01-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
TW101147963A TWI468705B (en) 2012-12-18 2012-12-18 Transformer monitoring device

Country Status (1)

Country Link
TW (1) TWI468705B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316824A (en) * 2014-11-18 2015-01-28 国家电网公司 On-line iron core grounding current monitoring device
CN104764929A (en) * 2015-03-10 2015-07-08 三峡大学 Grounding current testing device for portable transformer iron core

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101387676A (en) * 2008-07-17 2009-03-18 东北电力大学 Large-sized transformer core and on-line monitoring and protecting system for insulaiton fault of clamps
CN101661073A (en) * 2009-09-23 2010-03-03 河南省电力公司商丘供电公司 Online monitoring method of multipoint earthing of clamping piece of transformer
CN202583315U (en) * 2012-05-19 2012-12-05 保定天腾电气有限公司 On-line monitoring system for transformer iron core grounding current

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101387676A (en) * 2008-07-17 2009-03-18 东北电力大学 Large-sized transformer core and on-line monitoring and protecting system for insulaiton fault of clamps
CN101661073A (en) * 2009-09-23 2010-03-03 河南省电力公司商丘供电公司 Online monitoring method of multipoint earthing of clamping piece of transformer
CN202583315U (en) * 2012-05-19 2012-12-05 保定天腾电气有限公司 On-line monitoring system for transformer iron core grounding current

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Publication number Publication date
TW201425950A (en) 2014-07-01

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