CN202710647U - Monitoring device for direct current system - Google Patents
Monitoring device for direct current system Download PDFInfo
- Publication number
- CN202710647U CN202710647U CN 201220396873 CN201220396873U CN202710647U CN 202710647 U CN202710647 U CN 202710647U CN 201220396873 CN201220396873 CN 201220396873 CN 201220396873 U CN201220396873 U CN 201220396873U CN 202710647 U CN202710647 U CN 202710647U
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- Prior art keywords
- voltage
- capacitor
- monitoring device
- power supply
- direct current
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- Expired - Fee Related
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses a monitoring device for a direct current system. Positive and negative poles of a DC power supply loop of a transformer substation and a power station are respectively and additionally provided with a non-polarity coupling capacitor, output ends of the two non-polarity coupling capacitors are accessed to a voltage indicator, and an AC voltage in the direct current system can be read by the voltage indicator. According to the monitoring device, the AC voltage is detected through the coupling capacitors installed in the DC power supply loop and is sent to the voltage indicator, the voltage indicator compares the detected AC voltage with a voltage value prescribed by the voltage indicators, and sends out an alarm at the same time, thereby judging whether an AC intrudes into the DC power supply so as to avoid the non-operation and misoperation of the retaining device; and the monitoring device plays a good monitoring role for the situation of AC intrusion into the DC power supply of the transformer substation and the power station.
Description
Technical field
The utility model relates to a kind of monitoring device, particularly relates to a kind of straight-flow system monitoring device; The utility model also relates to a kind of monitoring method of utilizing this monitoring system.
Background technology
Be an isolated neutral system in transformer station and generating plant direct supply, alternating voltage is the system of a ground connection.In a single day direct supply has AC power to scurry into, and the stack of alternating current-direct current signal usually can occur, or produce the DC earthing phenomenon, has caused protective device generation tripping and nonaction.
At present, each transformer station and generating plant direct supply all do not set up relevant AC power to scurry into monitoring device and the method for direct current, usually after protection malfunction or tripping accident occur electrical network, by analyzing, judge, check, find out AC power.This mode is the work consuming danger that also increased consuming time both.
The utility model content
Technical problem to be solved in the utility model provides a kind of monitoring device of direct current, can find out fast and effectively AC power.
For solving the problems of the technologies described above, a kind of straight-flow system monitoring device that the utility model provides is characterized in that, comprising:
One power supply;
One first capacitor is arranged at the positive pole of described power supply;
One second capacitor is arranged at the negative pole of described power supply;
One voltage table is connected to the output terminal of described the first capacitor and the second capacitor;
One monitor screen is used for the supervisory system alternating voltage and changes;
Wherein, the first capacitor and the second capacitor are used for the alternating voltage of coupling direct supply, and voltage table carries out the voltage indication, when the magnitude of voltage that detects when monitor screen surpasses the magnitude of voltage of regulation, send alerting signal.
Further, described the first capacitor and described the second capacitor are nonpolarity coupling condenser.
Practical straight-flow system monitoring device of the present utility model can be monitored the alternating voltage that transfinites fast and effectively, and whole system is safe and reliable, can obviously lower operations staff's danger.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is the utility model straight-flow system monitoring device synoptic diagram;
Fig. 2 is the utility model straight-flow system monitoring method process flow diagram.
The critical piece mark is as follows:
Power supply 1 first capacitor 2
The second capacitor 3 voltage tables 4
Switch 5 monitor screens 6
Embodiment
For making the auditor better understand the utility model, now be described below by reference to the accompanying drawings.
As shown in Figure 1, the utility model straight-flow system monitoring device comprises, the second capacitor 3 and the two electric capacity output terminals of the first capacitor 2 of one power supply 1, a power supply 1 positive terminal, a power supply 1 negative pole end are connected by a voltage table 4, one monitor screen 6 is used for the variation of monitoring system alternating voltage and warning.Described the first capacitor 2 and the second capacitor 3 are nonpolarity coupling condenser.In addition, the utility model can also be set up a switch 5 at monitor screen 6 one ends, is used for whether conducting of control monitor screen 6.
As shown in Figure 2, straight-flow system monitoring method of the present utility model comprises:
1, the first capacitor and the second capacitor-coupled alternating voltage 201 in the direct supply.
2, voltage table reads described alternating voltage 202.
3, the ac voltage that measures when observing and controlling screen in time sends alerting signal 203 during greater than the magnitude of voltage of regulation.
When the operations staff receives alerting signal, report scheduling in the very first time and carry out next step inspection processing, avoid occuring power grid accident.
More than by specific embodiment the utility model is had been described in detail, but these are not to consist of restriction of the present utility model.In the situation that does not break away from the utility model principle, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection domain of the present utility model.
Claims (3)
1. a straight-flow system monitoring device is characterized in that, comprising:
One power supply;
One first capacitor is arranged at the positive pole of described power supply;
One second capacitor is arranged at the negative pole of described power supply;
One voltage table is connected to the output terminal of described the first capacitor and the second capacitor;
One monitor screen is used for the supervisory system alternating voltage and changes;
Wherein, the first capacitor and the second capacitor are used for the alternating voltage of coupling direct supply, and voltage table carries out the voltage indication, when the magnitude of voltage that detects when monitor screen surpasses the magnitude of voltage of regulation, send alerting signal.
2. straight-flow system monitoring device as claimed in claim 1 is characterized in that, described the first capacitor and described the second capacitor are nonpolarity coupling condenser.
3. straight-flow system monitoring device as claimed in claim 1 is characterized in that, also comprises a switch, is used for controlling the whether conducting of described monitor screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220396873 CN202710647U (en) | 2012-08-02 | 2012-08-02 | Monitoring device for direct current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220396873 CN202710647U (en) | 2012-08-02 | 2012-08-02 | Monitoring device for direct current system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202710647U true CN202710647U (en) | 2013-01-30 |
Family
ID=47590935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220396873 Expired - Fee Related CN202710647U (en) | 2012-08-02 | 2012-08-02 | Monitoring device for direct current system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202710647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323655A (en) * | 2013-06-08 | 2013-09-25 | 国家电网公司 | Non-contact alternating current and direct current crosstalk online detecting device and non-contact alternating current and direct current crosstalk online detecting method |
| CN103575965A (en) * | 2012-08-02 | 2014-02-12 | 温州市科星电子有限公司 | Direct current system monitoring device and method |
-
2012
- 2012-08-02 CN CN 201220396873 patent/CN202710647U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575965A (en) * | 2012-08-02 | 2014-02-12 | 温州市科星电子有限公司 | Direct current system monitoring device and method |
| CN103323655A (en) * | 2013-06-08 | 2013-09-25 | 国家电网公司 | Non-contact alternating current and direct current crosstalk online detecting device and non-contact alternating current and direct current crosstalk online detecting method |
| CN103323655B (en) * | 2013-06-08 | 2015-04-29 | 国家电网公司 | Non-contact alternating current and direct current crosstalk online detecting device and non-contact alternating current and direct current crosstalk online detecting method |
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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 |
Granted publication date: 20130130 Termination date: 20150802 |
|
| EXPY | Termination of patent right or utility model |