CN103675579A - Remote-signaling acquisition circuit with DC grounding automatic wire-selecting function - Google Patents
Remote-signaling acquisition circuit with DC grounding automatic wire-selecting function Download PDFInfo
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- CN103675579A CN103675579A CN201210356164.9A CN201210356164A CN103675579A CN 103675579 A CN103675579 A CN 103675579A CN 201210356164 A CN201210356164 A CN 201210356164A CN 103675579 A CN103675579 A CN 103675579A
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Abstract
The invention relates to a remote-signaling acquisition circuit with a DC grounding automatic wire-selecting function. The circuit includes a 220V-24V first-level optical-isolation remote-signaling acquisition circuit and a 24V-5V second-level optical-isolation remote-signaling acquisition circuit. The remote-signaling acquisition circuit is characterized in that the two ends of a switch-on terminal of a signal access end of the 220V-24V first-level optical-isolation remote-signaling acquisition circuit are connected with a capacitor in parallel. The 220V-24V first-level optical-isolation remote-signaling acquisition circuit is connected with the 24V-5V second-level optical-isolation remote-signaling acquisition circuit through an optical coupler OC1. The 24V-5V second-level optical-isolation remote-signaling acquisition circuit is connected with a CPU signal processing circuit through an optical coupler OC2. The emote-signaling acquisition circuit with the DC grounding automatic wire-selecting function is capable of sending an alarm signal when an anode of a signal control cable is grounded and judging the specific position of a cable insulating damage according to step-down of the voltage of a remote-signaling DC bus so as to facilitate rapid fault elimination. At the same time, the circuit is simple in structure, convenient to install and use and reliable in performance.
Description
Technical field
The present invention 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, and the remote signal module that mostly accesses power automation device by control cables 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 carries out data acquisition.Because remote signalling loop adopts the D. C. floating rechargable battery power supply of transformer station conventionally, 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 remote signalling power supply ,+110V is the common port in remote signalling loop.The situations such as remote signalling cable insulation damages as run into, knife switch secondary contact is intake, cable connection construction is touched by mistake, very easily cause direct-flow positive pole ground connection.Owing to not having reliably, route selection means intuitively adopt and manually carry out remote signalling power supply sky and open the method by screen disconnects, remote signalling cable is extractd by road, usually cause the running state monitoring of transformer station to be interrupted and the generation of error signals in a large number, even in investigation process, cause second point DC earthing to cause the accident of switch trip to occur, potential safety hazard is very large.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of remote signalling Acquisition Circuit with DC earthing automatic route selection function is provided.
The object of the present invention is achieved like this: 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 remote signalling Acquisition Circuit, it is characterized in that every opening into terminal two ends of remote signalling Acquisition Circuit signal incoming end, being parallel with an electric capacity at 220V-24V one-level light.
Described 220V-24V one-level light is connected every remote signalling Acquisition Circuit with 24V-5V secondary light every OC1 by light every remote signalling Acquisition Circuit, and 24V-5V secondary light is connected with cpu signal treatment circuit every OC2 by light every remote signalling Acquisition Circuit.
Advantage of the present invention is: when there is signal controlling cable plus earth, can send alerting signal, step in conjunction with remote signalling DC bus-bar voltage declines, 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.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
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 filtration; The stabilivolt W1 being connected every OC1 with light is used for sharing most of voltage and light is carried out to overvoltage protection every OC1; The diode V4 being connected every OC1 with light is used for preventing inverse current, and V3 is for carrying out reverse-voltage protection to light every OC1; With+resistance R that 110V direct supply is connected 6 is current-limiting resistance, every OC1, there is not overcurrent damage in protection light; R7 and R8 are the resistance that the list of signal controlling cable returns heart yearn, the distributed capacitor that C0 is cable.
24V-5V secondary light every the light of remote signalling Acquisition Circuit every OC2 for 24V power-supply system and 5V power-supply system is isolated, and signal is carried out being delivered to 5V CPU remote signals treatment circuit after debounce and filtration; The diode V2 being connected every OC2 with light is used for preventing inverse current, and diode V1 is for carrying out overvoltage protection to light every OC2; Resistance R 1, R2, R3 and capacitor C 1 form T-shaped RC filtering circuit, for remote signals being carried out to the filtration of high-frequency interferencing signal; With+resistance R that 24V direct supply is connected 5 is the collector current-limiting resistance of light every OC1 triode.
At 220V-24V one-level light, every opening into terminal S1 two ends of remote signalling Acquisition Circuit signal incoming end, be parallel with a capacitor C 2, when the anodal generation of signal controlling cable ground connection, together with the distributed capacitor C0 of C2 and cable for light provides On current in short-term every OC1, 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 remote signalling DC bus-bar voltage declines again, can accurately judge signal controlling cable which there is to insulation damages in heart yearn, be convenient to the quick eliminating of remote signalling DC earthing defect.
Resistance R 4 is connected in CPU remote signals treatment circuit+5V power supply, is the collector current-limiting resistance of light every OC2 triode.
The voltage of remote signalling lead-out terminal provides the normal voltage of 0V or the 5V of standard by following to open into the conducting state of terminal for CPU, through the communication program of CPU by the state response of remote signalling output in the man-machine interfaces such as plant stand line chart, warning window and SOE list at monitoring system of electric substation background computer and distant place master supervisory system.
Principle of work of the present invention is, at straight-flow system plus earth initial time, to be added in light and every upper power, to be greater than the starting power of optocoupler conducting, optocoupler conducting.Because 24V-5V secondary light is less than light lotus root ON time every the T-shaped RC filtering of remote signalling Acquisition Circuit and the software debounce time representative value of cpu signal treatment circuit, therefore the present invention can collect this and open the operating state into signal that terminal accesses, and involution within a certain period of time, by monitoring system of electric substation or master supervisory system, can view SOE and the warning message of this signal, the lower record that more suddenlys change to the measurement of DC bus-bar voltage in conjunction with measure and control device again, described in can accurately judging, open the fault that DC earthing appears in the remote signalling control cables loop connecing into terminal.
Claims (2)
1. a 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 remote signalling Acquisition Circuit, it is characterized in that every opening into terminal two ends of remote signalling Acquisition Circuit signal incoming end, being parallel with an electric capacity at 220V-24V one-level light.
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 remote signalling Acquisition Circuit with 24V-5V secondary light every OC1 by light every remote signalling Acquisition Circuit, 24V-5V secondary light is connected with cpu signal treatment circuit every OC2 by light every remote signalling Acquisition Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210356164.9A CN103675579A (en) | 2012-09-24 | 2012-09-24 | Remote-signaling acquisition circuit with DC grounding automatic wire-selecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210356164.9A CN103675579A (en) | 2012-09-24 | 2012-09-24 | Remote-signaling acquisition circuit with DC grounding automatic wire-selecting function |
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| CN103675579A true CN103675579A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210356164.9A Pending CN103675579A (en) | 2012-09-24 | 2012-09-24 | Remote-signaling acquisition circuit with DC grounding automatic wire-selecting function |
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| CN (1) | CN103675579A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011419A (en) * | 2019-04-17 | 2019-07-12 | 珠海优特电力科技股份有限公司 | A kind of ground line extension tears state wireless collection shielding system and its working method open |
| CN110058933A (en) * | 2019-04-25 | 2019-07-26 | 国网山东省电力公司 | The method and system of hundred Microsecond grade remote signalling SOE are realized under a kind of linux system |
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| CN2318639Y (en) * | 1997-10-20 | 1999-05-12 | 杨学昌 | Earth monitor for electrostatic earthed system |
| CN2322305Y (en) * | 1997-05-27 | 1999-06-02 | 大连电业局 | Monitor controller for distributing switch on pole |
| CN202770951U (en) * | 2012-09-24 | 2013-03-06 | 辽宁省电力有限公司大连供电公司 | Remote signal acquisition circuit with direct current grounding automatic line selection function |
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2012
- 2012-09-24 CN CN201210356164.9A patent/CN103675579A/en active Pending
Patent Citations (3)
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|---|---|---|---|---|
| CN2322305Y (en) * | 1997-05-27 | 1999-06-02 | 大连电业局 | Monitor controller for distributing switch on pole |
| CN2318639Y (en) * | 1997-10-20 | 1999-05-12 | 杨学昌 | Earth monitor for electrostatic earthed system |
| CN202770951U (en) * | 2012-09-24 | 2013-03-06 | 辽宁省电力有限公司大连供电公司 | Remote signal acquisition circuit with direct current grounding automatic line selection function |
Non-Patent Citations (1)
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| 龚强，王津: "《地区电网调度自动化技术与应用》", 31 July 2005, article "《地区电网调度自动化技术与应用》" * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011419A (en) * | 2019-04-17 | 2019-07-12 | 珠海优特电力科技股份有限公司 | A kind of ground line extension tears state wireless collection shielding system and its working method open |
| CN110011419B (en) * | 2019-04-17 | 2023-09-22 | 珠海优特电力科技股份有限公司 | Wireless acquisition isolation system in ground wire hanging and detaching state and working method thereof |
| CN110058933A (en) * | 2019-04-25 | 2019-07-26 | 国网山东省电力公司 | The method and system of hundred Microsecond grade remote signalling SOE are realized under a kind of linux system |
| CN110058933B (en) * | 2019-04-25 | 2023-07-04 | 国网山东省电力公司 | Method and system for realizing hundred microsecond-level remote signaling SOE (system of event) under Linux system |
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Application publication date: 20140326 |