CN202710647U - Monitoring device for direct current system - Google Patents

Monitoring device for direct current system Download PDF

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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
Authority
CN
China
Prior art keywords
voltage
capacitor
monitoring device
power supply
direct 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.)
Expired - Fee Related
Application number
CN 201220396873
Other languages
Chinese (zh)
Inventor
陈书欣
陈林钢
陈为志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WENZHOU CITY KEXING ELECTRIC CO Ltd
Original Assignee
WENZHOU CITY KEXING ELECTRIC CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WENZHOU CITY KEXING ELECTRIC CO Ltd filed Critical WENZHOU CITY KEXING ELECTRIC CO Ltd
Priority to CN 201220396873 priority Critical patent/CN202710647U/en
Application granted granted Critical
Publication of CN202710647U publication Critical patent/CN202710647U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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

The straight-flow system monitoring device
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.
CN 201220396873 2012-08-02 2012-08-02 Monitoring device for direct current system Expired - Fee Related CN202710647U (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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