CN106841743B - Method and device for detecting and controlling secondary side of transformer - Google Patents
Method and device for detecting and controlling secondary side of transformer Download PDFInfo
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- CN106841743B CN106841743B CN201611066191.7A CN201611066191A CN106841743B CN 106841743 B CN106841743 B CN 106841743B CN 201611066191 A CN201611066191 A CN 201611066191A CN 106841743 B CN106841743 B CN 106841743B
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- transformer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
Abstract
The invention discloses a method and a device for detecting and controlling the secondary side of a transformer, wherein the method comprises a detection device, a voltage transformer and a current transformer which are connected with the detection device, the voltage transformer is connected with a standby power supply through an electromagnetic switch, the electromagnetic switch is connected with the detection device, a transformation ratio device is arranged between the current transformer and the detection device, the transformation ratio device is connected with the detection device, and the device comprises coils with different transformation ratios and a bidirectional electromagnetic switch which controls the coils with different transformation ratios to carry out connection and disconnection operation; the invention combines voltage monitoring and current detection of the transformer, and adds a corresponding control device to realize control of voltage and current, thereby ensuring the stability of voltage and current and ensuring the normal operation of metering, protecting and detecting functions.
Description
Technical field:
the invention relates to the field of detection control of transformers, in particular to a method and a device for detecting and controlling a secondary side of a transformer.
The background technology is as follows:
the transformer substation converts large current into small current smaller than 5A through the current transformer, and secondary small current of the transformer substation is mainly used for metering, protection, monitoring and other functions. When the electricity load of a newly-installed user is very small and the running current is far smaller than the precision allowable current of the electric energy metering device, the substation split metering device can generate larger errors and can also cause protection and monitoring failure, the protection failure can cause potential safety hazard, the metering failure can cause enterprise economic loss, and the monitoring non-rule can influence the judgment and analysis of the running state of equipment by operators, so that the secondary current is very important in a reasonable range. And the load of some new board surfaces of the transformer substation is far smaller than the load of the transformer substation, so that secondary current distortion of the current transformer is caused, the transformation ratio of the current transformer is required to be reasonably managed and switched, and the electric energy metering precision and the protection reliability are improved, so that the operation reliability and the economy of a power grid are improved. When the CT transformation ratio of the circuit is required to be changed, the corresponding rear cover of the switch cabinet must be opened to search and connect again, and a secondary person is required to be overhauled to cooperate, so that time and labor are wasted, and the CT transformation ratio can be directly changed by designing a device.
Meanwhile, the transformer substation converts high voltage into low voltage of 100V through a voltage transformer, and secondary low voltage of the transformer substation is mainly used for metering, protection, monitoring and other functions. When the transformer fails in primary and secondary, the secondary voltage of the transformer substation is lost, so that the protection, metering and monitoring are lost, potential safety hazards are caused by the loss of protection, enterprise economy is caused by the loss of metering, and judgment and analysis of the running state of equipment by operators are influenced by the loss of monitoring, so that the effect of the secondary voltage is very important. The faults such as primary fuse of the transformer substation voltage transformer cause the defect of secondary voltage, in order to discover secondary voltage faults in time, the secondary equipment voltage needs to be monitored, and the secondary voltage monitoring capability is improved, so that the operation reliability and economy of a power grid are improved.
The invention comprises the following steps:
the technical problems to be solved by the invention are as follows: the transformer secondary side detection control method and device have the advantages of being simple in structure, capable of simultaneously detecting and controlling the voltage transformer and the current transformer and having a short message alarming function.
The technical scheme of the invention is as follows: a method for detecting and controlling the secondary side of a transformer,
A. the detection device detects the voltage and the current of the secondary side of the transformer in real time and processes the detected voltage and current;
B. when the detected voltage fluctuates, the electromagnetic switch is controlled by the detection device to switch the standby power supply into the secondary side of the transformer, the primary side of the transformer is disconnected, and then the detection device is used for continuing to detect;
C. if the stable voltage signal is detected, a standby power supply is used for supplying power, and the detection device sends primary side fault information of the transformer to the mobile terminal carried by the personnel through the short message controller;
D. if the voltage signal is detected to be stable, the standby power supply is disconnected, the primary side of the transformer is used for continuously supplying power, and the detection device sends fault information of the secondary side of the transformer to the mobile terminal carried by the personnel through the short message controller;
E. when no voltage signal is detected, the detection device performs primary recording, the detection device controls the electromagnetic switch to connect the standby power supply to the secondary side of the transformer, the primary side of the transformer is disconnected, and then the detection device continues to detect;
F. if the stable voltage signal is detected, a standby power supply is used for supplying power, and the detection device sends primary side fault information of the transformer to the mobile terminal carried by the personnel through the short message controller;
G. if the stable voltage signal is not detected, the standby power supply is disconnected, and the detection device sends the fault information of the secondary side of the transformer to the mobile terminal carried by the personnel through the short message controller;
H. when the problem of the secondary side current is detected, the fault information of the secondary side of the transformer is sent to the mobile terminal carried by the personnel through the short message controller, and if the working current of the accessed equipment is small, the personnel changes the transformation ratio of the secondary side of the transformer through the change-over switch and the transformation ratio device.
The transformer comprises a voltage transformer and a current transformer, the transformation ratio device is connected with the detection device and comprises coils with different transformation ratios and a bidirectional electromagnetic switch for controlling the coils with different transformation ratios to carry out connection and disconnection operations.
The standby power supply is arranged on the secondary side of the voltage transformer, the transformation ratio device is arranged on the secondary side of the current transformer, and a wire connected with the electromagnetic switch is arranged on a coil on the secondary side of the voltage transformer.
The utility model provides a mutual-inductor secondary side detection controlling means, includes detection device and voltage transformer and current transformer rather than being connected, characterized by: the voltage transformer is connected with a standby power supply through an electromagnetic switch, the electromagnetic switch is connected with a detection device, a transformation ratio device is arranged between the current transformer and the detection device, and the transformation ratio device is connected with the detection device.
The transformation ratio device is connected with the detection device and comprises coils with different transformation ratios and a bidirectional electromagnetic switch for controlling the coils with different transformation ratios to carry out connection and disconnection operations.
The standby power supply is arranged on the secondary side of the voltage transformer, a wire connected with the electromagnetic switch is arranged on a coil on the secondary side of the voltage transformer, the transformation ratio device is arranged on the secondary side of the current transformer, and the detection device comprises a singlechip, an indicator lamp connected with the singlechip, a switching key and a storage.
The beneficial effects of the invention are as follows:
1. the invention combines voltage monitoring and current detection of the transformer, and adds a corresponding control device to realize control of voltage and current, thereby ensuring the stability of voltage and current and ensuring the normal operation of metering, protecting and detecting functions.
2. According to the invention, the standby power supply is arranged on the secondary side of the voltage transformer, and the monitoring device is used for controlling, so that the faults of the primary side and the secondary side of the transformer are detected, fault information is sent to a mobile terminal carried by a person, and the person can detect the fault point in a targeted manner.
3. The invention sets the standby power supply on the secondary side of the voltage transformer, and when a problem occurs on the primary side, the standby power supply can be switched on to perform power supply operation, so that the stability of power utilization is ensured.
4. The invention is provided with the transformation ratio device, can be controlled by the detection device, and can realize the switching of different transformation ratios by the detection device when the load of the electric equipment is far smaller than the load of the electric equipment, thereby solving the problem of secondary current distortion of the current transformer caused by the prior art and solving the complicated manual operation of manually opening the switch cabinet by personnel.
Description of the drawings:
fig. 1 is a block diagram of a secondary side detection control device of a transformer.
Fig. 2 is a schematic diagram of a connection structure of the voltage transformer.
Fig. 3 is a schematic diagram of a connection structure of the current transformer.
The specific embodiment is as follows:
examples: see fig. 1, 2 and 3.
A method for detecting and controlling the secondary side of a mutual inductor comprises the following steps:
A. the detection device detects the voltage and the current of the secondary side of the transformer in real time and processes the detected voltage and current;
B. when the detected voltage fluctuates, the electromagnetic switch is controlled by the detection device to switch the standby power supply into the secondary side of the transformer, the primary side of the transformer is disconnected, and then the detection device is used for continuing to detect;
C. if the stable voltage signal is detected, a standby power supply is used for supplying power, and the detection device sends primary side fault information of the transformer to the mobile terminal carried by the personnel through the short message controller;
D. if the voltage signal is detected to be stable, the standby power supply is disconnected, the primary side of the transformer is used for continuously supplying power, and the detection device sends fault information of the secondary side of the transformer to the mobile terminal carried by the personnel through the short message controller;
E. when no voltage signal is detected, the detection device performs primary recording, the detection device controls the electromagnetic switch to connect the standby power supply to the secondary side of the transformer, the primary side of the transformer is disconnected, and then the detection device continues to detect;
F. if the stable voltage signal is detected, a standby power supply is used for supplying power, and the detection device sends primary side fault information of the transformer to the mobile terminal carried by the personnel through the short message controller;
G. if the stable voltage signal is not detected, the standby power supply is disconnected, and the detection device sends the fault information of the secondary side of the transformer to the mobile terminal carried by the personnel through the short message controller;
H. when the problem of the secondary side current is detected, the fault information of the secondary side of the transformer is sent to the mobile terminal carried by the personnel through the short message controller, and if the working current of the accessed equipment is small, the personnel changes the transformation ratio of the secondary side of the transformer through the change-over switch and the transformation ratio device.
The transformer comprises a voltage transformer and a current transformer, the transformation ratio device is connected with the detection device and comprises coils with different transformation ratios and a bidirectional electromagnetic switch for controlling the coils with different transformation ratios to be connected and disconnected.
The standby power supply is arranged on the secondary side of the voltage transformer, the transformation ratio device is arranged on the secondary side of the current transformer, and a wire connected with the electromagnetic switch is arranged on a coil on the secondary side of the voltage transformer.
The utility model provides a transformer secondary side detection controlling means, includes detection device and voltage transformer and the current transformer who is connected with it, and voltage transformer passes through electromagnetic switch and is connected with stand-by power supply, and electromagnetic switch is connected with detection device, is provided with the transformation ratio device between current transformer and the detection device, and transformation ratio device is connected with detection device.
The transformation ratio device is connected with the detection device and comprises coils with different transformation ratios and a bidirectional electromagnetic switch for controlling the coils with different transformation ratios to carry out connection and disconnection operations.
The standby power supply is arranged on the secondary side of the voltage transformer, a wire connected with the electromagnetic switch is arranged on a coil on the secondary side of the voltage transformer, the transformation ratio device is arranged on the secondary side of the current transformer, and the detection device comprises a singlechip, an indicator lamp connected with the singlechip, a switching key and a storage.
The two coils with different transformation ratios are connected with the two-way electromagnetic switch, so that one coil is always in a working state, and meanwhile, the switch of the invention adopts the electromagnetic switch, so that the isolation is strong, and the working safety is ensured.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.
Claims (5)
1. A method for detecting and controlling the secondary side of a mutual inductor comprises the following steps:
A. the detection device detects the voltage and the current of the secondary side of the transformer in real time and processes the detected voltage and current;
B. when the detected voltage fluctuates, the electromagnetic switch is controlled by the detection device to switch the standby power supply into the secondary side of the transformer, the primary side of the transformer is disconnected, and then the detection device is used for continuing to detect;
C. if the stable voltage signal is detected, a standby power supply is used for supplying power, and the detection device sends primary side fault information of the transformer to the mobile terminal carried by the personnel through the short message controller;
D. if the voltage signal is detected to be not stable, the standby power supply is disconnected, the primary side of the transformer is used for continuously supplying power, and the detection device sends fault information of the secondary side of the transformer to the mobile terminal carried by the personnel through the short message controller;
E. when no voltage signal is detected, the detection device performs primary recording, the detection device controls the electromagnetic switch to connect the standby power supply to the secondary side of the transformer, the primary side of the transformer is disconnected, and then the detection device continues to detect;
F. if the stable voltage signal is detected, a standby power supply is used for supplying power, and the detection device sends primary side fault information of the transformer to the mobile terminal carried by the personnel through the short message controller;
G. if the stable voltage signal is not detected, the standby power supply is disconnected, and the detection device sends the fault information of the secondary side of the transformer to the mobile terminal carried by the personnel through the short message controller;
H. when detecting that the secondary side current is problematic, sending transformer secondary side fault information to a mobile terminal carried by a person through a short message controller, and if the working current of the accessed equipment is small, changing the transformer secondary side transformation ratio of the transformer through a change-over switch by the person through a transformation ratio device;
the transformer comprises a voltage transformer and a current transformer, the transformation ratio device is connected with the detection device and comprises coils with different transformation ratios and a bidirectional electromagnetic switch for controlling the coils with different transformation ratios to carry out connection and disconnection operations; the standby power supply is arranged on the secondary side of the voltage transformer, the transformation ratio device is arranged on the secondary side of the current transformer, and a wire connected with the electromagnetic switch is arranged on a coil on the secondary side of the voltage transformer;
a standby power supply is arranged on the secondary side of the voltage transformer, and when a problem occurs on the primary side, the standby power supply can be switched on to perform power supply operation, so that the power utilization stability is ensured; the two coils with different transformation ratios are connected with the two-way electromagnetic switch, so that one coil is always in a working state, and the switch adopts the electromagnetic switch.
2. The transformer secondary side detection control device based on the transformer secondary side detection control method of claim 1, comprising a detection device, and a voltage transformer and a current transformer connected with the detection device, and being characterized in that: the voltage transformer is connected with a standby power supply through an electromagnetic switch, the electromagnetic switch is connected with a detection device, a transformation ratio device is arranged between the current transformer and the detection device, and the transformation ratio device is connected with the detection device.
3. The transformer secondary side detection control device according to claim 2, characterized in that: the transformation ratio device is connected with the detection device and comprises coils with different transformation ratios and a bidirectional electromagnetic switch for controlling the coils with different transformation ratios to carry out connection and disconnection operations.
4. The transformer secondary side detection control device according to claim 2, characterized in that: the standby power supply is arranged on the secondary side of the voltage transformer, a wire connected with the electromagnetic switch is arranged on a coil on the secondary side of the voltage transformer, and the transformation ratio device is arranged on the secondary side of the current transformer.
5. The transformer secondary side detection control device according to claim 2, characterized in that: the detection device comprises a singlechip, an indicator light connected with the singlechip, a switching key and a storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611066191.7A CN106841743B (en) | 2016-11-28 | 2016-11-28 | Method and device for detecting and controlling secondary side of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611066191.7A CN106841743B (en) | 2016-11-28 | 2016-11-28 | Method and device for detecting and controlling secondary side of transformer |
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| Publication Number | Publication Date |
|---|---|
| CN106841743A CN106841743A (en) | 2017-06-13 |
| CN106841743B true CN106841743B (en) | 2023-07-07 |
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| CN201611066191.7A Active CN106841743B (en) | 2016-11-28 | 2016-11-28 | Method and device for detecting and controlling secondary side of transformer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11341678A (en) * | 1998-05-27 | 1999-12-10 | Toyo Electric Mfg Co Ltd | Detection method of abnormality in three-phase ac power generator output voltage detection circuit |
| CN2775813Y (en) * | 2004-12-31 | 2006-04-26 | 范晓明 | Precision split core type current transformer |
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
| CN104332951A (en) * | 2014-11-11 | 2015-02-04 | 国家电网公司 | Protection system for secondary-side open circuit of current transformer |
| CN204241588U (en) * | 2014-11-11 | 2015-04-01 | 国家电网公司 | Current transformer operating state monitoring system |
-
2016
- 2016-11-28 CN CN201611066191.7A patent/CN106841743B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11341678A (en) * | 1998-05-27 | 1999-12-10 | Toyo Electric Mfg Co Ltd | Detection method of abnormality in three-phase ac power generator output voltage detection circuit |
| CN2775813Y (en) * | 2004-12-31 | 2006-04-26 | 范晓明 | Precision split core type current transformer |
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
| CN104332951A (en) * | 2014-11-11 | 2015-02-04 | 国家电网公司 | Protection system for secondary-side open circuit of current transformer |
| CN204241588U (en) * | 2014-11-11 | 2015-04-01 | 国家电网公司 | Current transformer operating state monitoring system |
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| CN106841743A (en) | 2017-06-13 |
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