CN205280827U - Ground resistance of wind power generation factory developments monitoring device - Google Patents
Ground resistance of wind power generation factory developments monitoring device Download PDFInfo
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- CN205280827U CN205280827U CN201521073635.0U CN201521073635U CN205280827U CN 205280827 U CN205280827 U CN 205280827U CN 201521073635 U CN201521073635 U CN 201521073635U CN 205280827 U CN205280827 U CN 205280827U
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- earth
- earth resistance
- wind power
- pressure measurement
- measurement instrument
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Abstract
Ground resistance of wind power generation factory developments monitoring device is including differential mode observation circuit, common mode measuring circuit, treater and central monitoring host, differential mode observation circuit and common mode measuring circuit and treater electric connection, treater and central monitoring host data connection. The utility model discloses the ground resistance that can monitor every unit in the wind field at any time changes, exceedes when predetermineeing the index value as an arbitrary generating set's ground resistance, can report to the police, infories the staff, avoids too high because of generating set's ground resistance, influences generating set's safe operation, the power system fault that arouses.
Description
Technical field
This utility model relates to a kind of wind power plant earth resistance dynamic monitoring device.
Background technology
All be arranged on the mountain top in field or mountain range and knob due to wind power generating set, the lightning strike probability of annual wind power generating set is about 15% so that the earth work of wind power generating set also exists huge technical difficulty. The rate of change of the earth resistance of wind power generating set is usually about 50%, when the rate of change of earth resistance is more than 100%, the safe operation of wind power generating set can be caused serious hidden danger, that is when earth resistance is too high, the point position drift of wind power generating set neutral point can be caused, cause electric network fault, thus the earth resistance change grasping every generating set in wind field at any time is highly desirable to.
Utility model content
For the deficiencies in the prior art, this utility model is intended to provide a kind of wind power plant's earth resistance dynamic monitoring device solving above-mentioned technical problem.
For achieving the above object, this utility model adopts the following technical scheme that
A kind of wind power plant earth resistance dynamic monitoring device, including differential mode observation circuit, common mode measuring circuit, processor and center monitoring main frame; Differential mode observation circuit and common mode measuring circuit are electrically connected with processor, and processor and center monitoring host data connect;
Described differential mode observation circuit is for detecting the resistance of the earth-return circuit of wind power generating set, and generates corresponding first earth resistance value signal;
Described common mode measuring circuit is for detecting the earth resistance of the earth-return circuit of wind power generating set, and generates corresponding second earth resistance value signal;
Described processor is for the earth resistance meansigma methods according to the first earth resistance value signal and the second grounding resistance signal acquisition generating set, and generate earth resistance average value signal, and this earth resistance average value signal is sent to center monitoring main frame by network;
Described center monitoring main frame, for earth resistance average value signal and pre-set level value being compared, when the earth resistance average value signal of generating set exceedes pre-set level value, sends alarm signal.
Preferably, described wind power plant earth resistance dynamic monitoring device includes High-pressure measurement Instrument, analog digital conversion and integration module, input/output module and two electromagnetic transducers;
First test side of High-pressure measurement Instrument and the second test side connect earth-return circuit respectively through two electromagnetic transducers, and the outfan of High-pressure measurement Instrument connects processor by analog digital conversion and integration module and input/output module;
The voltage electrode of High-pressure measurement Instrument and galvanic electrode ground connection, the earth lead test electrode of High-pressure measurement Instrument connects earth-return circuit;
High-pressure measurement Instrument, analog digital conversion and integration module, input/output module and two electromagnetic transducers constitute above-mentioned differential mode observation circuit; Number conversion and integration module, input/output module and High-pressure measurement Instrument and voltage electrode, galvanic electrode and earth lead test electrode constitute this common mode observation circuit.
Preferably, wind power plant's earth resistance dynamic monitoring device also includes alarm, and alarm is electrically connected center monitoring main frame.
The beneficial effects of the utility model are at least as follows:
This utility model can monitor the earth resistance change of every unit in wind field at any time, when the earth resistance of any one generating set exceedes pre-set level value, can report to the police, notify staff, avoid because the earth resistance of generating set is too high, affect the safe operation of generating set, the electric network fault caused.
Accompanying drawing explanation
Fig. 1 is the structural representation of the better embodiment of this utility model wind power plant earth resistance dynamic monitoring device;
Fig. 2 is the structural representation of the differential mode observation circuit in Fig. 1 and common mode observation circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, this utility model is described further:
Referring to Fig. 1, this utility model relates to a kind of wind power plant earth resistance dynamic monitoring device, and its better embodiment includes differential mode observation circuit 101, common mode measuring circuit 102, processor and center monitoring main frame; Differential mode observation circuit 101 and common mode measuring circuit 102 are electrically connected with processor, and processor and center monitoring host data connect;
Described differential mode observation circuit 101 is for detecting the resistance of the earth-return circuit of wind power generating set, and generates corresponding first earth resistance value signal;
Described common mode measuring circuit 102 is for detecting the earth resistance of the earth-return circuit of wind power generating set, and generates corresponding second earth resistance value signal;
Described processor is for the earth resistance meansigma methods according to the first earth resistance value signal and the second grounding resistance signal acquisition generating set, and generate earth resistance average value signal, and this earth resistance average value signal is sent to center monitoring main frame by network;
Described center monitoring main frame, for earth resistance average value signal and pre-set level value being compared, when the earth resistance average value signal of generating set exceedes pre-set level value, sends alarm signal.
Referring to Fig. 2, it is preferable that described wind power plant earth resistance dynamic monitoring device includes High-pressure measurement Instrument, analog digital conversion and integration module, input/output module and two electromagnetic transducers;
First test side of High-pressure measurement Instrument and the second test side connect earth-return circuit respectively through two electromagnetic transducers, and the outfan of High-pressure measurement Instrument connects processor by analog digital conversion and integration module and input/output module;
The voltage electrode P of High-pressure measurement Instrument and galvanic electrode C ground connection, the earth lead test electrode T of High-pressure measurement Instrument connects earth-return circuit;
High-pressure measurement Instrument, analog digital conversion and integration module, input/output module and two electromagnetic transducers constitute above-mentioned differential mode observation circuit 101; Number conversion and integration module, input/output module and High-pressure measurement Instrument and voltage electrode P, galvanic electrode C and earth lead test electrode T constitute this common mode observation circuit.
In the present embodiment, differential mode observation circuit 101 and common mode measuring circuit 102 are installed on the outside of the current transformer motor of every wind power generating set, and unit utilizes house transformer to provide high pressure for differential mode observation circuit 101 and common mode measuring circuit 102. Ground wire is applied high pressure by the electromagnetic transducer that High-pressure measurement Instrument connects in differential mode observation circuit 101, make one constant voltage of generation in tested earth-return circuit, constant voltage can make tested earth-return circuit produce faradic current, then pass through High-pressure measurement Instrument and detect faradism flow valuve, then current value is sent to analog digital conversion and integration module, the analogue signal of input is converted to digital signal, then passes through input/output module and send the first earth resistance signal of earth-return circuit to processor. High-pressure measurement Instrument is by applying high pressure to the voltage electrode P in common mode measuring circuit 102, the current value of High-pressure measurement Instrument detection galvanic electrode C, then current value is sent to analog digital conversion and integration module, the analogue signal of input is converted to digital signal, and sends the second earth resistance signal to processor by input/output module. Second earth resistance signal of the first resistance signal and common mode measuring circuit 102 transmission that processor receives the earth-return circuit that differential mode observation circuit 101 transmits carries out processing computing, and carry out mixing contrast, draw the earth resistance meansigma methods of this unit, and this meansigma methods is transferred to center monitoring main frame by network.
In the present embodiment, the earth resistance meansigma methods of above-mentioned every the unit monitored can also send center monitoring main frame to by SCADA (SupervisoryControlAndDataAcquisition, data acquisition controls with the monitoring) system of unit. Center monitoring main frame receives the earth resistance meansigma methods of every unit, is changed by the earth resistance of all units of wind power plant and carries out Data Integration in real time, and generates earth resistance rate of change chart.
Preferably, wind power plant's earth resistance dynamic monitoring device also includes alarm, and alarm is electrically connected center monitoring main frame. Every generating set of wind power plant has default grounding resistance, and when in wind power plant, the earth resistance of any one unit exceedes pre-set level value, center monitoring main frame is to alarm generation alarm signal, and alarm sends alarm.
For a person skilled in the art, can technical scheme as described above and design, make other various corresponding changes and deformation, and all these change and deformation all should belong within this utility model scope of the claims.
Claims (3)
1. wind power plant's earth resistance dynamic monitoring device, it is characterised in that: it includes differential mode observation circuit, common mode measuring circuit, processor and center monitoring main frame; Differential mode observation circuit and common mode measuring circuit are electrically connected with processor, and processor and center monitoring host data connect;
Described differential mode observation circuit is for detecting the resistance of the earth-return circuit of wind power generating set, and generates corresponding first earth resistance value signal;
Described common mode measuring circuit is for detecting the earth resistance of the earth-return circuit of wind power generating set, and generates corresponding second earth resistance value signal;
Described processor is for the earth resistance meansigma methods according to the first earth resistance value signal and the second grounding resistance signal acquisition generating set, and generate earth resistance average value signal, and this earth resistance average value signal is sent to center monitoring main frame by network;
Described center monitoring main frame, for earth resistance average value signal and pre-set level value being compared, when the earth resistance average value signal of wind power generating set exceedes pre-set level value, sends alarm signal.
2. wind power plant as claimed in claim 1 earth resistance dynamic monitoring device, it is characterised in that: described wind power plant earth resistance dynamic monitoring device includes High-pressure measurement Instrument, analog digital conversion and integration module, input/output module and two electromagnetic transducers;
First test side of High-pressure measurement Instrument and the second test side connect earth-return circuit respectively through two electromagnetic transducers, and the outfan of High-pressure measurement Instrument connects processor by analog digital conversion and integration module and input/output module;
The voltage electrode of High-pressure measurement Instrument and galvanic electrode ground connection, the earth lead test electrode of High-pressure measurement Instrument connects earth-return circuit;
High-pressure measurement Instrument, analog digital conversion and integration module, input/output module and two electromagnetic transducers constitute above-mentioned differential mode observation circuit; Number conversion and integration module, input/output module and High-pressure measurement Instrument and voltage electrode, galvanic electrode and earth lead test electrode constitute this common mode observation circuit.
3. wind power plant as claimed in claim 1 earth resistance dynamic monitoring device, it is characterised in that: wind power plant's earth resistance dynamic monitoring device also includes alarm, and alarm is electrically connected center monitoring main frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521073635.0U CN205280827U (en) | 2015-12-22 | 2015-12-22 | Ground resistance of wind power generation factory developments monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521073635.0U CN205280827U (en) | 2015-12-22 | 2015-12-22 | Ground resistance of wind power generation factory developments monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205280827U true CN205280827U (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521073635.0U Expired - Fee Related CN205280827U (en) | 2015-12-22 | 2015-12-22 | Ground resistance of wind power generation factory developments monitoring device |
Country Status (1)
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| CN (1) | CN205280827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008199A (en) * | 2017-12-28 | 2018-05-08 | 广东电网有限责任公司韶关供电局 | A kind of grounding resistance detection system |
-
2015
- 2015-12-22 CN CN201521073635.0U patent/CN205280827U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008199A (en) * | 2017-12-28 | 2018-05-08 | 广东电网有限责任公司韶关供电局 | A kind of grounding resistance detection system |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20160601 Termination date: 20201222 |