CN107064648A - The detection device and method of the lightning-arrest lead resistance of blower fan pylon based on leakage cable - Google Patents
The detection device and method of the lightning-arrest lead resistance of blower fan pylon based on leakage cable Download PDFInfo
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- CN107064648A CN107064648A CN201710181491.8A CN201710181491A CN107064648A CN 107064648 A CN107064648 A CN 107064648A CN 201710181491 A CN201710181491 A CN 201710181491A CN 107064648 A CN107064648 A CN 107064648A
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- resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses the lightning-arrest lead resistance detection device of the blower fan pylon based on leakage cable and method, the detection device includes：Resistance measurement high-frequency signal generation module, leaky cable, signal, which are received, sends processing module；Resistance measurement high-frequency signal generation module is mounted on blower fan column overhead, and the internal signal wire of resistance measurement high-frequency signal generation module is connected by the starting point of wire and ground lead；Leaky cable and signal transacting sending module are arranged on blower fan tower bottom of towe, in the field domain generated when wherein leakage cable is arranged on ground lead naked section by high-frequency signal, signal, which is received, to be sent processing module electrical connection leaky cable and is also connected with ethernet communication network, the measuring system of blower fan pylon connects the ethernet communication network, and the data handled through the measuring system are sent to the host computer of observation measuring chamber.
Description
Technical field
The present invention relates to the technical field of wind-power electricity generation, the lightning-arrest lead of blower fan pylon more particularly to based on leakage cable
The detection device and method of resistance.
Background technology
Existing wind power generating set is all mounted in the wide plains region in field, and wind power plant is up to tens meters very
To rice up to a hundred, cause what it was easily struck by lightning and was directly becoming thunder and lightning to connect sudden strain of a muscle thing.Due to blower interior structure closely, no matter
Blade, cabin or empennage are struck by lightning, and the equipment such as electric-control system in cabin may all be strikeed back by the high potential of cabin.
Power supply and control loop draw along pylon under way in, it is also possible to strikeed back by high potential.In fact, for high among wilderness
Object is alarmmed, no matter how to be protected, is impossible to avoid thunderbolt completely.Therefore, should for the lightning protection of wind power generating set
This is laid stress on by how rapid by lightning current introducing the earth when being struck by lightning, and is reduced as far as being imported the electricity of equipment by thunder and lightning
Stream, ensures equipment and the safety of personnel to greatest extent, loss is reduced to the degree of minimum.The measurement deposited now, which is taken shelter from the thunder, draws
The method of line resistance is mainly as follows：
The principle of three electrode method measurement of Grounding Resistance is to inject hand generator between electric current pole and tested grounding body to produce
Low-frequency ac electric current, it is tested between grounding body and voltage pole obtain voltage U, by the electric current and magnitude of voltage, according to ohm
Law can calculate the grounding resistance of tested grounding body.Three-level method will make a call to two auxiliary electrodes when measuring every time, on the one hand increase
Plus manpower, on the other hand some wind power plants may beat electrode without field condition, and manual operation link is relatively more, to result
Influence is than larger.
Measuring pole tower ground resistance using split-core type meter method is improved greatly the one of conventional method, when its outstanding advantages is measurement not
Electric current pole and voltage pole lead must be laid, as long as clamping overhead line structures down conductor with split-core type meter, it is possible to survey grounding resistance, but
The signal that this method is used is in low-frequency range, and easily some signals with blower fan pylon in itself produce interference, cause precision low
Or result is invalid.
Can be with it is desirable to there is a kind of blower fan pylon based on leakage cable to take shelter from the thunder the detection device and method of lead resistance
Solve the drawbacks described above of prior art.
The content of the invention
A kind of detection device for lead resistance of being taken shelter from the thunder it is an object of the invention to provide blower fan pylon based on leakage cable
And method is accurately measured blower fan pylon grounding resistance and realizes that remote online is measured.
To achieve the above object, the present invention provides the lightning-arrest lead resistance detection device of blower fan pylon based on leakage cable,
The detection device includes：Resistance measurement high-frequency signal generation module, leaky cable and signal, which are received, sends processing module；
Resistance measurement high-frequency signal generation module is mounted on blower fan column overhead, resistance measurement high-frequency signal generation module
Internal signal wire connected by the starting point of wire and ground lead；
Leaky cable and signal receive transmission processing module and are arranged on blower fan tower bottom of towe, wherein leakage cable is arranged on ground connection
In the field domain generated when lead naked section is by high-frequency signal, signal, which is received, to be sent processing module electrical connection leaky cable and goes back
Ethernet communication network is connected, the measuring system of blower fan pylon connects the ethernet communication network, and will be through the measurement
The data of system processing are sent to the host computer of observation measuring chamber.
Preferably, the power supply mode of the resistance measurement high-frequency signal generation module is self-powered power supply, the resistance
High-frequency signal generation module is measured according at the top of the blower fan pylon, and the resistance measurement high-frequency signal generation module is close
Encapsulation is closed, to reduce external interference.
The present invention also provides the detection method that the blower fan pylon based on leakage cable takes shelter from the thunder lead resistance, including following step
Suddenly：
(1) resistance is measured：Measure ground lead resistance using Ohm's law, in measurement, by high-precision constant pressure source and
Reference resistance links together with lightning-arrest lead, is sampled by the magnitude of voltage to reference resistance two ends and combines Ohm's law
Analyzed, obtain the resistance performance state of ground lead；
(2) resistance is sent：The resistance value that resistance measurement high-frequency signal generation module is measured according to step (1), is produced different
Signal, while in order to avoid the low frequency signal of blower fan pylon in itself produces interference to measurement, signal frequency is arranged on high frequency, i.e.,
MHz, the signal of generation enters ground lead after enhanced processing, and acquisition grounding resistance is changed by reading the frequency of the signal
Resistance；
(3) resistance is received：After the high-frequency signal that resistance measurement high-frequency signal generation module is produced enters ground lead, connect
The naked section of ground lead can form stable electromagnetic field, and leakage cable is placed in the field domain, the reception of high-frequency signal is realized,
The signal received is transferred in signal reception transmission processing module and pre-processed；
(4) resistance is read：Host computer reads the data of the signal receiving processing module pretreatment through each assembling, and right
Preprocessed data is further processed, the resistance value specifically measured.
Preferably, the reference resistance of the step (1) chooses high-accuracy standard for manual sampling resistance to ensure enough measurement essences
Degree, resistance precision 0.01%.
Preferably, the resistance accuracy of the grounding resistance of the step (2) is set to 0.1 Ω.
The detection device and method of the lightning-arrest lead resistance of blower fan pylon proposed by the present invention based on leakage cable are utilized and let out
Dew cable realizes blower fan pylon grounding resistance using simple device with cheap cost, and accurately measurement remotely exists while realizing
Line is measured, and manpower can be removed completely, and the consumption of man power and material is reduced to greatest extent.
Brief description of the drawings
Fig. 1 is the structural representation of the detection device of the lightning-arrest lead resistance of blower fan pylon based on leakage cable.
Fig. 2 is the circuit connection diagram of resistance measuring module and high-frequency signal generation module.
Fig. 3 is the flow chart of the detection method of the lightning-arrest lead resistance of blower fan pylon based on leakage cable.
Fig. 4 is the communication network schematic diagram of the detection device of the lightning-arrest lead resistance of blower fan pylon based on leakage cable.
Embodiment
To make the purpose, technical scheme and advantage of the invention implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label represent same or similar element or the element with same or like function.Described embodiment is the present invention
A part of embodiment, rather than whole embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to uses
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Under
Embodiments of the invention are described in detail with reference to accompanying drawing for face.
As shown in figure 1, the equipment that fan blade and wheel hub are arranged on above blower fan pylon has connecting wire, these wires
Merged at the total meeting point 5 of starting point, ground lead grounding resistance refers to the resistance from starting point to earthing or grounding means, resistance measurement
High-frequency signal generation module 1 is arranged on tower top, and its internal signal wire is connected to by the starting point of common wire and ground lead
Together, the power supply mode of resistance measurement high-frequency signal generation module 1 chooses self-powered power supply, and wind can be arranged on as needed
Any appropriate position of machine tower top, and the module uses closed processes, and external interference is reduced as far as possible；
Signal, which is received, sends processing module 2 and leakage cable 3 installed in the bottom of blower fan pylon, wherein leakage cable 3 is set
Put in the field domain generated when ground lead naked section 4 is by high-frequency signal, signal receive send processing module 2 on the one hand will be with
Leakage cable 3 is connected, and on the other hand to be accessed in whole ethernet communication network；Whole Ethernet connects each blower fan pylon
Measuring system, and they are pooled in the host computer in observation measuring chamber.
As shown in Figures 2 and 3, Rx represents the grounding resistance of lightning conductor, and R represents the reference electricity of the access system in test
Resistance, FR represents isolation relay, is connected when system starts test, while test module can be protected under non-test state
From the damage of thunderbolt.K1, k2 represent gate-controlled switch, with the carry out break-make of testing process during test.Exposed ground section is represented
At blower fan pylon Bottom ground wire exposed a bit of (also referred to as drop bar).
It is as follows to measuring principle and process description with reference to the flow chart of figure three：
System start-up phase：Connect after FR, system starts；
The measuring phases of ground lead resistance value：The present invention is measured using Ohm's law to resistance, and k1 closures, k2 breaks
Open, constant pressure source and sample circuit are connected with system, and constant pressure source internal resistance can be ignored to systematic influence, and constant source voltage value is
U, sampled point measurement reference resistance (resistance is R) both end voltage is U1, then need the resistance value measured to be calculated as follows：
To ensure measurement accuracy, it is to avoid the error of single measurement takes average, it is necessary to repeatedly measure；
Signal produces the stage：After the completion of resistance measurement, disconnect k1, connect k2, signal generator according to measurement resistance not
The signal of different frequency is produced with situation.The signal enters in ground lead after amplifying unit；In order to effective earth's surface
Show the size of ground lead resistance value, this patent is compiled using the high-frequency signal for choosing two different frequencies using serial binary
Code form re-sends to ground lead after being arranged, and pre-sets the corresponding ground lead resistance of various coded formats
It is worth size, and coding digit is more, it becomes possible to and the more accurate resistance for representing ground lead, binding test use-case is had
Body is described as follows：
Choose two kinds of frequency signals of 30MHz and 35MHz in testing, need to represent in the measurements it is interval [1 Ω, 11 Ω)
Resistance, and set the progressive value of resistance (resistance span) to be 0.1 Ω, 100 kinds of binary coded values are needed altogether, so setting serial
Binary coding digit is 7, and 2 can be generated by amounting to7=128 kinds of results, choose 100 kinds of possible situations and by various situations with
The resistance situation that can be measured that is corresponded, such as in testing shown in the 4.0 Ω following form of expression situation：
In this 100 kinds of coding situations, it may appear that adjacent two or a few bit frequency identical situations, when resistance judges
It can be identified according to the duration of every.
So it is achieved that the downward transmission of specific resistance.
Signal is received and transmission phase：The stage is illustrated in two kinds of situation：The first situation be ground lead
Any signal will not be sensed through because failure disconnects, revealing cable in this case；Another situation is leakage cable energy
High-frequency signal is enough sensed, illustrates ground lead at least without disconnection, signal, which is received, sends the signal that 2 pairs of processing module is received
Pre-processed, host computer is then sent it to by Ethernet；
Signal differentiates the stage：Host computer receives the signal that each Fans are sent, advance before measurement according to starting
The serial frequency coded meanings of the different frequency composition of setting the resistance value of ground lead are identified display, and completion is once surveyed
Amount.
As shown in figure 4, whole system applies the structural representation in wind power plant, it is pre- that signal receives transmission processing module 2
Signal after processing is sent to host computer after A/D conversions by ethernet communication module.
The take shelter from the thunder detection device and method of lead resistance of the blower fan pylon based on leakage cable of the present invention has and following had
Beneficial effect：
1. the lightning-arrest wire ground resistance size of blower fan pylon can be quickly detected in real time.
2. hardware has carried out calculation process to signal, the utilization rate of equipment is improved.
3. installing software on computer that can be in master control room to be shown, conveniently check, reduction is unnecessary to hurry back and forth,
Not spending can be observed under blower fan pylon.
4. hardware configuration is simple, it is easily installed, blower fan groundwork will not be impacted, while controllability is good.
5. with good ductility, multiple blower fan pylons can be simultaneously monitored.
6. good modularization feature allows the invention to be well embedded in other blower fan pylon equipment, with fine
Compatibility, be that the work of Field Force brings great convenience.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
The present invention is described in detail with reference to the foregoing embodiments for pipe, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (5)
- The lead resistance detection device 1. the blower fan pylon based on leakage cable is taken shelter from the thunder, it is characterised in that the detection device includes： Resistance measurement high-frequency signal generation module, leaky cable and signal, which are received, sends processing module；Resistance measurement high-frequency signal generation module is mounted on blower fan column overhead, resistance measurement high-frequency signal generation module it is interior Portion's signal wire is connected by the starting point of wire and ground lead；Leaky cable and signal receive transmission processing module and are arranged on blower fan tower bottom of towe, wherein leakage cable is arranged on ground lead In the field domain generated when naked section is by high-frequency signal, signal, which is received, to be sent processing module electrical connection leaky cable and is also connected with Ethernet communication network, the measuring system of blower fan pylon connects the ethernet communication network, and will be through the measuring system at The data of reason are sent to the host computer of observation measuring chamber.
- The lead resistance detection device 2. the blower fan pylon as claimed in claim 1 based on leakage cable is taken shelter from the thunder, it is characterised in that： The power supply mode of the resistance measurement high-frequency signal generation module is self-powered power supply, the resistance measurement high-frequency signal generation Module is arranged at the top of the blower fan pylon, and the resistance measurement high-frequency signal generation module enclosed package, outer to reduce Disturb on boundary.
- The detection method of lead resistance 3. the blower fan pylon based on leakage cable is taken shelter from the thunder, it is characterised in that comprise the following steps：1) resistance is measured：Ground lead resistance is measured using Ohm's law, in measurement, by high-precision constant pressure source and with reference to electricity Resistance links together with lightning-arrest lead, is sampled by the magnitude of voltage to reference resistance two ends and combines Ohm's law and is divided Analysis, obtains the resistance performance state of ground lead；(2) resistance is sent：The resistance value that resistance measurement high-frequency signal generation module is measured according to step (1), produces different letters Number, while in order to avoid the low frequency signal of blower fan pylon in itself produces interference to measurement, signal frequency is arranged on high frequency, i.e. MHz, The signal of generation enters ground lead after enhanced processing, changes the resistance of acquisition grounding resistance by reading the frequency of the signal Value；(3) resistance is received：After the high-frequency signal that resistance measurement high-frequency signal generation module is produced enters ground lead, grounding lead The naked section of line can form stable electromagnetic field, and leakage cable is placed in the field domain, the reception of high-frequency signal is realized, received To signal be transferred to signal receive send processing module in pre-processed；(4) resistance is read：Host computer reads the data of the signal receiving processing module pretreatment through each assembling, and to pre- place Reason data are further processed, the resistance value specifically measured.
- The detection method of lead resistance 4. the blower fan pylon as claimed in claim 3 based on leakage cable is taken shelter from the thunder, its feature exists In：The reference resistance of the step (1) chooses high-accuracy standard for manual sampling resistance to ensure enough measurement accuracy, resistance precision 0.01%.
- The detection method of lead resistance 5. the blower fan pylon as claimed in claim 3 based on leakage cable is taken shelter from the thunder, its feature exists In：The resistance accuracy of the grounding resistance of the step (2) is set to 0.1 Ω.
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| CN201710181491.8A CN107064648B (en) | 2017-03-24 | 2017-03-24 | The detection device and method of the lightning-arrest lead resistance value of blower fan pylon based on leakage cable |
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| CN201710181491.8A CN107064648B (en) | 2017-03-24 | 2017-03-24 | The detection device and method of the lightning-arrest lead resistance value of blower fan pylon based on leakage cable |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3626965A1 (en) * | 2018-09-21 | 2020-03-25 | Siemens Gamesa Renewable Energy A/S | Object position and/or speed and/or size and/or direction detection device for a wind turbine |
| EP3719309A1 (en) * | 2019-04-01 | 2020-10-07 | Siemens Gamesa Renewable Energy A/S | Apparatus for and method of detecting one or more properties of a rotor blade during operation of a wind turbine |
| EP3719307A1 (en) * | 2019-04-01 | 2020-10-07 | Siemens Gamesa Renewable Energy A/S | Distributed system for and method of detecting position and/or speed of a rotor blade during operation of a wind turbine |
| WO2020200698A1 (en) * | 2019-04-01 | 2020-10-08 | Siemens Gamesa Renewable Energy A/S | Electromagnetic measurements for a wind turbine |
| CN112904085A (en) * | 2021-01-15 | 2021-06-04 | 江苏双瑞风电叶片有限公司 | Device and method for automatically measuring resistance value of lightning protection system of wind power blade |
| CN113631905A (en) * | 2019-04-01 | 2021-11-09 | 西门子歌美飒可再生能源公司 | Method and device for performing measurement and monitoring of an object |
| CN113646656A (en) * | 2019-04-01 | 2021-11-12 | 西门子歌美飒可再生能源公司 | Detecting characteristics of moving objects at a wind turbine site using a beamforming arrangement of leaky feeders |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3626965A1 (en) * | 2018-09-21 | 2020-03-25 | Siemens Gamesa Renewable Energy A/S | Object position and/or speed and/or size and/or direction detection device for a wind turbine |
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| CN112689712A (en) * | 2018-09-21 | 2021-04-20 | 西门子歌美飒可再生能源公司 | Object position and/or speed and/or size detection device for a wind turbine |
| WO2020200765A1 (en) * | 2019-04-01 | 2020-10-08 | Siemens Gamesa Renewable Energy A/S | Apparatus for and method of detecting one or more properties of a rotor blade during operation of a wind turbine |
| WO2020200698A1 (en) * | 2019-04-01 | 2020-10-08 | Siemens Gamesa Renewable Energy A/S | Electromagnetic measurements for a wind turbine |
| WO2020200754A1 (en) * | 2019-04-01 | 2020-10-08 | Siemens Gamesa Renewable Energy A/S | Distributed system for and method of detecting position and/or speed of a rotor blade during operation of a wind turbine |
| EP3719307A1 (en) * | 2019-04-01 | 2020-10-07 | Siemens Gamesa Renewable Energy A/S | Distributed system for and method of detecting position and/or speed of a rotor blade during operation of a wind turbine |
| CN113614361A (en) * | 2019-04-01 | 2021-11-05 | 西门子歌美飒可再生能源公司 | Electromagnetic measurement for wind turbines |
| CN113631905A (en) * | 2019-04-01 | 2021-11-09 | 西门子歌美飒可再生能源公司 | Method and device for performing measurement and monitoring of an object |
| CN113646656A (en) * | 2019-04-01 | 2021-11-12 | 西门子歌美飒可再生能源公司 | Detecting characteristics of moving objects at a wind turbine site using a beamforming arrangement of leaky feeders |
| EP3719309A1 (en) * | 2019-04-01 | 2020-10-07 | Siemens Gamesa Renewable Energy A/S | Apparatus for and method of detecting one or more properties of a rotor blade during operation of a wind turbine |
| US12018649B2 (en) | 2019-04-01 | 2024-06-25 | Siemens Gamesa Renewable Energy A/S | Apparatus for and method of detecting one or more properties of a rotor blade during operation of a wind turbine |
| CN112904085A (en) * | 2021-01-15 | 2021-06-04 | 江苏双瑞风电叶片有限公司 | Device and method for automatically measuring resistance value of lightning protection system of wind power blade |
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| CN107064648B (en) | 2019-11-29 |
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