CN107453315A - A kind of protection device of current transformer power taking - Google Patents
A kind of protection device of current transformer power taking Download PDFInfo
- Publication number
- CN107453315A CN107453315A CN201710880748.9A CN201710880748A CN107453315A CN 107453315 A CN107453315 A CN 107453315A CN 201710880748 A CN201710880748 A CN 201710880748A CN 107453315 A CN107453315 A CN 107453315A
- Authority
- CN
- China
- Prior art keywords
- loop
- power supply
- current transformer
- transformer
- current
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
-
- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of protection device of current transformer power taking, including：DSP operation treatment loop, Switching Power Supply loop, electric current input circuit, control source loop, On-off signal loop, relay output loop, order circuit and LCD show circuits, wherein, the Switching Power Supply loop, electric current input circuit, control source loop and On-off signal loop are all connected to the input of the DSP operation treatment loop, and the relay output loop, order circuit and LCD show circuits are all connected to the output end of the DSP operation treatment loop；The input in the Switching Power Supply loop is connected with transformer power supply conditioning loop, and the input in the transformer power supply conditioning loop is connected with conventional electric power loop summation current transformer energy and draws loop.The integrated man-machine interface of the present invention, comprehensive control, upper and lower computer communication, it is easy to maintenance.
Description
Technical field
The present invention relates to the high-tension switch cabinet technical field of power system, more particularly to a kind of Current Transformer power taking
Protection device.
Background technology
Microcomputer protecting device in the market is required for greatly external dc power, and device can not be just after anti-locking system dead electricity
Often operation.
The content of the invention
In order to should and the market demand, the present invention a kind of protection device of current transformer power taking is provided, it includes：DSP is transported
Calculation treatment loop, Switching Power Supply loop, electric current input circuit, control source loop, On-off signal loop, relay export back
Road, order circuit and LCD show circuits, wherein, the Switching Power Supply loop, electric current input circuit, control source loop with
And On-off signal loop is all connected to the input of the DSP operation treatment loop, the relay output loop, communicates back
Road and LCD show circuits are all connected to the output end of the DSP operation treatment loop；The input in the Switching Power Supply loop
Transformer power supply conditioning loop is connected with, the input in the transformer power supply conditioning loop is connected with conventional electric power loop and electricity
Current transformer energy draws loop.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Preferably, the current transformer energy draws loop and taken by current transformer from the three-phase electricity of system operation
Electricity, then rectification carried out by rectifier bridge, the transformer power supply is sent a signal to after capacitor filtering and nurses one's health loop.
Preferably, when system running current reaches the 10% of rated current, the secondary power supply winding sense of current transformer
90V induced voltage should be gone out.
Preferably, it is sequentially provided with the transformer power supply conditioning loop：Operational amplifier U1A, in parallel two three poles
Pipe Q1, Q2, and a metal-oxide-semiconductor Q3.
Preferably, when system running current is more than the 60% of rated current, the current transformer energy draws loop
In current transformer there is saturated phenomenon, cause current transformer power supply output waveform formed spike, gradually draw high output
Voltage；When peak voltage is higher than 350V, amplifier U1A drivings triode Q1, Q2 in the transformer power supply conditioning loop are led
Logical metal-oxide-semiconductor Q3, power supply energy of releasing；As energy constantly consumes, voltage reduces；Fed back according to amplifier, when voltage is less than 300V
Luck, which puts back to road, ends metal-oxide-semiconductor, and voltage is gradually increasing.
The beneficial effects of the invention are as follows：
1st, level of integrated system is high, integrates man-machine interface, comprehensive control, upper machine communication, slave computer communication, easy to maintenance；
2nd, data use Differential Input, data stabilization, strong antijamming capability.
Brief description of the drawings
Fig. 1 is the structural representation of the protection device of the current transformer power taking of the present invention；
Fig. 2 is that the current transformer energy of the present invention draws the circuit diagram in loop；
Fig. 3 is that the transformer power supply of the present invention nurses one's health the circuit diagram in loop；
Fig. 4 is the circuit diagram of the conventional electric power loop of the present invention；
Fig. 5 is the circuit diagram in the Switching Power Supply loop of the present invention；
In the accompanying drawings, the list of designations represented by each label is as follows：
100 DSP operation treatment loops
201 Switching Power Supply loops
2011 transformer power supplys nurse one's health loop
2012 often use electric power loop
2013 current transformer energy draw loop
202 electric current input circuits
203 control source loops
204 On-off signal loops
301 relay output loops
302 order circuits
303 LCD show circuits
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
It refer to shown in Fig. 1, it is the structural representation of the protection device of the current transformer power taking of the present invention；The guarantor
Protection unit includes：DSP operation treatment loop 100, Switching Power Supply loop 201, electric current input circuit 202, control source loop
203rd, On-off signal loop 204, relay output loop 301, order circuit 302 and LCD show circuits 303, wherein,
The Switching Power Supply loop 201, electric current input circuit 202, control source loop 203 and On-off signal loop
204 are all connected to the input of the DSP operation treatment loop 100, the relay output loop 301, order circuit 302 with
And LCD show circuits 303 are all connected to the output end of the DSP operation treatment loop 100；
The input in the Switching Power Supply loop 201 is connected with transformer power supply conditioning loop 2011, the transformer electricity
The input in source conditioning loop 2011 is connected with the conventional summation current transformer energy of electric power loop 2012 and draws loop 2013.
It refer to shown in Fig. 2, it draws the circuit diagram in loop for the current transformer energy of the present invention；The Current Mutual Inductance
Device energy draws loop by current transformer from power taking in the three-phase electricity of system operation, when system running current reaches specified electricity
Stream 10% when, current transformer TFA, TFB and TFC secondary power supply winding induce 90V induced voltage；Pass through rectification again
Bridge DB107 carries out rectification, the transformer power supply conditioning loop is sent a signal to after capacitor filtering.Wherein, the 24G in figure
For public land.
It refer to shown in Fig. 3, it nurses one's health the circuit diagram in loop for the transformer power supply of the present invention；When system running current is big
When the 60% of rated current, saturated phenomenon occurs in the current transformer that the current transformer energy is drawn in loop, leads
The power supply output waveform for sending a telegraph current transformer forms spike, gradually draws high output voltage；It is described when peak voltage is higher than 350V
Amplifier U1A driving triode Q1, Q2 conducting metal-oxide-semiconductor Q3 in transformer power supply conditioning loop, power supply energy of releasing；With energy
Constantly consumption, voltage reduce；Fed back according to amplifier, putting back to road less than 300V lucks when voltage ends metal-oxide-semiconductor, on voltage is gradual
Rise.And so on circulate, system normal operation.
It refer to shown in Fig. 4, it is the circuit diagram of the conventional electric power loop of the present invention；The conventional electric power loop also inputs
To the Switching Power Supply loop, after conventional power supply breaks down, power supply is provided by current transformer.It is described normal in the present invention
It is that this area is used to have design with electric power loop, here is omitted.
Referring again to shown in Fig. 5, it is the circuit diagram in the Switching Power Supply loop of the present invention；The Switching Power Supply loop is this
Field is used design, and here is omitted.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (5)
- A kind of 1. protection device of current transformer power taking, it is characterised in that including：DSP operation treatment loop, Switching Power Supply are returned Road, electric current input circuit, control source loop, On-off signal loop, relay output loop, order circuit and LCD show Show loop, wherein,The Switching Power Supply loop, electric current input circuit, control source loop and On-off signal loop are all connected to described The input of DSP operation treatment loop, the relay output loop, order circuit and LCD show circuits are all connected to institute State the output end of DSP operation treatment loop；The input in the Switching Power Supply loop is connected with transformer power supply conditioning loop, the transformer power supply conditioning loop Input is connected with conventional electric power loop summation current transformer energy and draws loop.
- 2. protection device according to claim 1, it is characterised in that the current transformer energy draws loop and passes through electricity Current transformer from power taking in the three-phase electricity of system operation, then by rectifier bridge carry out rectification, signal is sent after capacitor filtering To transformer power supply conditioning loop.
- 3. protection device according to claim 2, it is characterised in that when system running current reaches the 10% of rated current When, the secondary power supply winding of current transformer induces 90V induced voltage.
- 4. protection device according to claim 2, it is characterised in that set successively in the transformer power supply conditioning loop Have：Operational amplifier U1A, in parallel two triodes Q1, Q2, and a metal-oxide-semiconductor Q3.
- 5. protection device according to claim 4, it is characterised in that when system running current is more than the 60% of rated current When, there is saturated phenomenon in the current transformer that the current transformer energy is drawn in loop, causes the power supply of current transformer Output waveform forms spike, gradually draws high output voltage；When peak voltage is higher than 350V, the transformer power supply nurses one's health loop In amplifier U1A driving triode Q1, Q2 conducting metal-oxide-semiconductor Q3, power supply energy of releasing；As energy constantly consumes, voltage reduces； Fed back according to amplifier, putting back to road less than 300V lucks when voltage ends metal-oxide-semiconductor, and voltage is gradually increasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710880748.9A CN107453315A (en) | 2017-09-26 | 2017-09-26 | A kind of protection device of current transformer power taking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710880748.9A CN107453315A (en) | 2017-09-26 | 2017-09-26 | A kind of protection device of current transformer power taking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107453315A true CN107453315A (en) | 2017-12-08 |
Family
ID=60497464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710880748.9A Pending CN107453315A (en) | 2017-09-26 | 2017-09-26 | A kind of protection device of current transformer power taking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107453315A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403690A (en) * | 2011-12-07 | 2012-04-04 | 西北工业大学 | Overcurrent protection circuit |
| CN103872787A (en) * | 2012-12-11 | 2014-06-18 | 江苏省电力公司连云港供电公司 | Novel high-voltage-side inductive-electricity-taking power-supply device |
| CN105375435A (en) * | 2015-11-30 | 2016-03-02 | 深圳市中电电力技术股份有限公司 | Self-power protection device and self-power protection device on the basis of power and tripping induction of three-phase current |
| CN207218216U (en) * | 2017-09-26 | 2018-04-10 | 烟台海珐电气科技有限公司 | A kind of protection device of current transformer power taking |
-
2017
- 2017-09-26 CN CN201710880748.9A patent/CN107453315A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403690A (en) * | 2011-12-07 | 2012-04-04 | 西北工业大学 | Overcurrent protection circuit |
| CN103872787A (en) * | 2012-12-11 | 2014-06-18 | 江苏省电力公司连云港供电公司 | Novel high-voltage-side inductive-electricity-taking power-supply device |
| CN105375435A (en) * | 2015-11-30 | 2016-03-02 | 深圳市中电电力技术股份有限公司 | Self-power protection device and self-power protection device on the basis of power and tripping induction of three-phase current |
| CN207218216U (en) * | 2017-09-26 | 2018-04-10 | 烟台海珐电气科技有限公司 | A kind of protection device of current transformer power taking |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171208 |