CN202770951U - Remote signal acquisition circuit with direct current grounding automatic line selection function - Google Patents
Remote signal acquisition circuit with direct current grounding automatic line selection function Download PDFInfo
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- CN202770951U CN202770951U CN201220487393.XU CN201220487393U CN202770951U CN 202770951 U CN202770951 U CN 202770951U CN 201220487393 U CN201220487393 U CN 201220487393U CN 202770951 U CN202770951 U CN 202770951U
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- acquisition circuit
- remote signal
- signal acquisition
- remote signalling
- light
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Abstract
The utility model relates to a remote signal acquisition circuit with a direct current grounding automatic line selection function. The remote signal acquisition circuit comprises a 220V- 4V first-level optical isolation remote signal acquisition circuit and a 24V-5V second-level optical isolation remote signal acquisition circuit, and is characterized in that two ends of an opening-inserting terminal of a signal access terminal of the 220V- 4V first-level optical isolation remote signal acquisition circuit are in parallel connection with a capacitor, the 220V- 4V first-level optical isolation remote signal acquisition circuit is connected with the 24V-5V second-level optical isolation remote signal acquisition circuit through an optical-coupler OC1, and the 24V-5V second-level optical isolation remote signal acquisition circuit is connected with a CPU signal processing circuit through an optical-coupler OC2. The remote signal acquisition circuit can send an alarm signal when a positive electrode of a signal control cable is grounded, combined with the step down of remote signal direct current bus voltage, a specific position of cable insulation damage can be accurately determined, thus the rapid elimination of a fault is facilitated, and the remote signal acquisition circuit has the advantages of simple structure, convenient installation and use, and reliable performance.
Description
Technical field
The utility model relates to a kind of remote signalling Acquisition Circuit, particularly a kind of remote signalling Acquisition Circuit with DC earthing automatic route selection function.
Background technology
The remote signalling loop of power automation device spreads all over numerous positions of each transformer station; its cable is long, quantity is many, as: the running status of the equipment such as switch, disconnecting link, transformer, capacitor, arc suppression coil, relay protection, automatic safety device, flow directing device is mostly carried out data acquisition by the remote signal module of control cables access power automation device.Because the D. C. floating rechargable battery power supply of transformer station is adopted in the remote signalling loop usually, opening into contact is passive dry contact, in order to improve the reliability of remote signalling action, general direct employing+110V and-DC bus-bar voltage of 110V is as the remote signalling power supply ,+110V is the common port in remote signalling loop.As run into the situations such as the remote signalling cable insulation damages, knife switch secondary contact is intake, cable connection construction mistake is bumped, very easily cause direct-flow positive pole ground connection.Owing to do not have reliably, intuitively route selection means adopt and manually carry out remote signalling power supply sky and open method by screen disconnects, the remote signalling cable is extractd by the road, usually cause the running state monitoring interruption of transformer station and the generation of a large amount of error signals, even in the investigation process, causing the second point DC earthing to cause the accident of switch trip to occur, potential safety hazard is very large.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of remote signalling Acquisition Circuit with DC earthing automatic route selection function is provided.
The purpose of this utility model is achieved in that a kind of remote signalling Acquisition Circuit with DC earthing automatic route selection function, comprise 220V-24V one-level light every remote signalling Acquisition Circuit and 24V-5V secondary light every the remote signalling Acquisition Circuit, it is characterized in that being parallel with an electric capacity at 220V-24V one-level light every opening into the terminal two ends of remote signalling Acquisition Circuit signal incoming end.
Described 220V-24V one-level light is connected every the remote signalling Acquisition Circuit with 24V-5V secondary light every OC1 by light every the remote signalling Acquisition Circuit, and 24V-5V secondary light is connected with the cpu signal treatment circuit every OC2 by light every the remote signalling Acquisition Circuit.
The utility model has the advantages that: when signal controlling cable plus earth occurs, can send alerting signal, step in conjunction with the remote signalling DC bus-bar voltage descends, can accurately judge the particular location that cable insulation damages, so that the quick eliminating of fault, it is simple in structure, easy to install simultaneously, dependable performance.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1,220V-24V one-level light is isolated for general ± 110V power-supply system and 24V power-supply system every OC1 every the light of remote signalling Acquisition Circuit 1, and signal is carried out being delivered to 24V-5V secondary light every remote signalling Acquisition Circuit 2 after debounce and the filtration; Be used for sharing most of voltage and light being carried out overvoltage protection every OC1 with the stabilivolt W1 that light links to each other every OC1; Be used for preventing inverse current with light every the diode V4 that OC1 links to each other, V3 is used for light is carried out reverse-voltage protection every OC1; Be current-limiting resistance with+resistance R that the 110V direct supply is connected 6, overcurrent damage does not occur every OC1 in protection light; R7 and R8 are the resistance that the list of signal controlling cable returns heart yearn, and C0 is the distributed capacitor of cable.
24V-5V secondary light is used for 24V power-supply system and 5V power-supply system is isolated every OC2 every the light of remote signalling Acquisition Circuit, and signal is carried out being delivered to 5V CPU remote signals treatment circuit after debounce and the filtration; Be used for preventing inverse current with light every the diode V2 that OC2 links to each other, diode V1 is used for light is carried out overvoltage protection every OC2; Resistance R 1, R2, R3 and capacitor C 1 consist of T-shaped RC filtering circuit, are used for remote signals is carried out the filtration of high-frequency interferencing signal; Be the collector current-limiting resistance of light every the OC1 triode with+resistance R that the 24V direct supply is connected 5.
Be parallel with a capacitor C 2 at 220V-24V one-level light every opening into terminal S1 two ends of remote signalling Acquisition Circuit signal incoming end, when the anodal generation of signal controlling cable ground connection, the distributed capacitor C0 of C2 and cable provides in short-term On current for light every OC1 together, can send thus this opens into the corresponding alerting signal of terminal, and be that " action " and " involution " signal occurs in pairs, step in conjunction with the remote signalling DC bus-bar voltage descends again, can accurately judge the signal controlling cable which insulation damages has been occured in heart yearn, be convenient to the quick eliminating of remote signalling DC earthing defective.
Resistance R 4 is connected in CPU remote signals treatment circuit+5V power supply, is the collector current-limiting resistance of light every the OC2 triode.
The voltage of remote signalling lead-out terminal will be followed and be opened the normal voltage that 0V or the 5V of standard are provided for CPU into the conducting state of terminal, in state response the man-machine interfaces such as factory station line chart, warning window and SOE tabulation at monitoring system of electric substation background computer and distant place master supervisory system of communication program with remote signalling output of CPU.
Principle of work of the present utility model is at straight-flow system plus earth initial time, to be added in light every the starting power of upper power greater than the optocoupler conducting, optocoupler conducting.Since 24V-5V secondary light every the software debounce time representative value of the T-shaped RC filtering of remote signalling Acquisition Circuit and cpu signal treatment circuit less than light lotus root ON time, therefore the utility model can collect this and open operating state into signal that terminal accesses, and within a certain period of time involution, can view SOE and the warning message of this signal by monitoring system of electric substation or master supervisory system, in conjunction with lower more the suddenly change record of measure and control device to the measurement of DC bus-bar voltage, namely can accurately judge the described fault that DC earthing appears in the remote signalling control cables loop that connects into terminal of opening again.
Claims (2)
1. remote signalling Acquisition Circuit with DC earthing automatic route selection function, comprise 220V-24V one-level light every remote signalling Acquisition Circuit and 24V-5V secondary light every the remote signalling Acquisition Circuit, it is characterized in that being parallel with an electric capacity at 220V-24V one-level light every opening into the terminal two ends of remote signalling Acquisition Circuit signal incoming end.
2. the remote signalling Acquisition Circuit with DC earthing automatic route selection function according to claim 1, it is characterized in that 220V-24V one-level light is connected every the remote signalling Acquisition Circuit with 24V-5V secondary light every OC1 by light every the remote signalling Acquisition Circuit, 24V-5V secondary light is connected with the cpu signal treatment circuit every OC2 by light every the remote signalling Acquisition Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220487393.XU CN202770951U (en) | 2012-09-24 | 2012-09-24 | Remote signal acquisition circuit with direct current grounding automatic line selection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220487393.XU CN202770951U (en) | 2012-09-24 | 2012-09-24 | Remote signal acquisition circuit with direct current grounding automatic line selection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202770951U true CN202770951U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220487393.XU Expired - Fee Related CN202770951U (en) | 2012-09-24 | 2012-09-24 | Remote signal acquisition circuit with direct current grounding automatic line selection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202770951U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675579A (en) * | 2012-09-24 | 2014-03-26 | 国网辽宁省电力有限公司大连供电公司 | Remote-signaling acquisition circuit with DC grounding automatic wire-selecting function |
| CN103872779A (en) * | 2014-03-25 | 2014-06-18 | 国家电网公司 | Air switch state remote monitoring device |
-
2012
- 2012-09-24 CN CN201220487393.XU patent/CN202770951U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675579A (en) * | 2012-09-24 | 2014-03-26 | 国网辽宁省电力有限公司大连供电公司 | Remote-signaling acquisition circuit with DC grounding automatic wire-selecting function |
| CN103872779A (en) * | 2014-03-25 | 2014-06-18 | 国家电网公司 | Air switch state remote monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20210924 |