CN109494619A - A kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing method - Google Patents
A kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing method Download PDFInfo
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- CN109494619A CN109494619A CN201811613427.3A CN201811613427A CN109494619A CN 109494619 A CN109494619 A CN 109494619A CN 201811613427 A CN201811613427 A CN 201811613427A CN 109494619 A CN109494619 A CN 109494619A
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- helicopter
- pulse
- transfer
- equipotential
- resistance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The present invention relates to a kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing methods, it include: that 1, basis goes straight up to machine overhauling equipotential operating process, pulse transfer current access equivalent-circuit model can be established, combined circuit theoretical calculation obtains its transfer current functional expression；2, upper transfer current functional expression is analyzed, the relevant parameter for clearly influencing its amplitude solves the problems, such as to generate amplitude transfer pulse electric current when transmission line of electricity helicopter hotline maintenance equipotential by the method for the series resistance between electric potential transferring stick end and helicopter workbench.It has the following beneficial effects: that (1) establishes pulse transfer current flow cycle model, according to Analysis of Electric Circuit Theory, specifies transfer current amplitude influence factor.(2) suppressing method of the series resistance between electric potential transferring stick end and helicopter workbench is proposed, this method is very easy to realize in Overhaul site, and inhibitory effect is obvious.
Description
Technical field
The invention belongs to electric transmission line hot-lines to overhaul field, and in particular to a kind of electricity such as transmission line of electricity helicopter hotline maintenance
Bit transition pulse current suppressing method.
Background technique
Current potential company, country is building the smart grid with extra-high voltage for main rack at present, therefore to transmission line of electricity band
The efficiency of electric service work, safety, timeliness propose requirements at the higher level, and in this context, helicopter live-line maintenance operation mode obtains
To greatly developing.Helicopter livewire work is the operation that a small number of developed countries use in power grid maintenance maintenance on our times
Means have the characteristics that operation rapidly and efficiently.Livewire work personnel are fed directly to line maintenance station by helicopter, make to overhaul people
Member greatly reduces without the physical demands and high pendant risk, physical demands of the service personnel in maintenance process of upper and lower steel tower,
Working time greatly shortens, and repair quality improves.It economically sees, the helicopter for being engaged in electric power overhaul according to current foreign countries is public
The analysis data for going straight up to the Utilities Electric Co. of machine operation are taken charge of and used, same livewire work work is completed, helicopter electrification is made
The job costs of industry method low than the cost of traditional artificial Live line maintenance method 10% or so.In summary, in power transmission line road transport
There is broad prospect of application in row maintenance area.
During helicopter platform method livewire work, into before equipotential, whole (the helicopter ontology+work of helicopter
Platform+equipotential live line work personnel) it is in floating potential, when carrying out equipotential transfer, ride in the equal electricity of workbench end
The electric potential transferring stick that position operating personnel is connected using rear end with helicopter workbench is close to live wire, until complete with conducting wire
Equipotential process is completed in contact.During potential transfer, the potential difference between electric potential transferring stick and conducting wire is more than air between them
Arc discharge can be generated after the dielectric strength in gap, discharge current shows apparent amplitude, high-frequency pulse feature, the arteries and veins
Helicopter ontology will be flowed through by workbench by rushing transfer current, be constituted to the safety of service personnel and helicopter workbench huge
It is big to threaten.Based on this, the present invention proposes the method by the series resistance between electric potential transferring stick end and helicopter workbench
To generate amplitude transfer pulse electric current when solving the problems, such as transmission line of electricity helicopter hotline maintenance equipotential.
Summary of the invention
The technical problem to be solved by the present invention is to amplitude transfer is generated when, transmission line of electricity helicopter hotline maintenance equipotential
The problem of pulse current.
The technical solution of the invention is as follows:
A kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing method characterized by comprising
Step 1, according to machine overhauling equipotential operating process is gone straight up to, pulse transfer current access equivalent circuit mould can be established
Type, combined circuit theoretical calculation obtain its transfer current functional expression, specifically:
Capacitor C1Analog conducting wire is to helicopter capacitor, C2Helicopter simulating direct-to-ground capacitance, R analog conducting wire is to electric potential transferring stick
Arc channel equivalent resistance when electric discharge.
Puncture moment t0For 0 moment, AC supply voltageAfter remembering that K1 closes a floodgate, resistance R electric current is i1,
Capacitor C2Electric current is i2, capacitor C1Electric current is i3, electric current positive direction is set as by left-to-right.Then have,
i1+i3=i2 (1)
WhereinSimultaneous obtains,
Simultaneous (2), (5) obtain,
It (6) is First order linear non-homogeneous differential equation, solution obtains,
NoteC is by i1The constant that initial value determines, according to,
By (7) it is found that pulse transfer current amplitude is by coefficient k2It is affected, k2Influence factor is more, but to a reality
For overhauling route, voltage class, frequency and distributed capacitance are all difficult to change, it is easy to accomplish the ginseng of Field adjustment
Number is arc channel resistance R, and arc channel resistance is bigger, then pulse current amplitude is lower, theoretically when arc channel resistance increases
It is 10 times big, pulse transfer current peak value can be reduced and reach 10%.
Step 2 analyzes upper transfer current functional expression, clearly influences the relevant parameter of its amplitude, and consider to transmit electricity
Line maintenance scene actual condition, the feasibility of more each parameter regulation, it is the simplest for changing transfer current arc channel resistance
Just and effectively restriction, solved by the method for the series resistance between electric potential transferring stick end and helicopter workbench
Amplitude transfer pulse electric current is led to the problem of when transmission line of electricity helicopter hotline maintenance equipotential.
In a kind of above-mentioned transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing method, step 2,
Since arc channel resistance itself can not change, the present invention passes through the series electrical between electric potential transferring stick and helicopter platform
Resistance can be played the role of being equivalent to increase arc channel resistance, and arc channel resistance resistance value itself is small, therefore 100 Ω electricity of connecting
Resistance is able to suppress transfer current peak value.
Technological core of the invention is to establish pulse transfer current flow cycle model, according to Circuit theory to its ammeter
Theory deduction is carried out up to formula, specifies transfer current amplitude influence factor.
The beneficial effects of the present invention are: (1) establishes pulse transfer current flow cycle model, according to Circuit theory point
Analysis, specifies transfer current amplitude influence factor.(2) it proposes and connects between electric potential transferring stick end and helicopter workbench
The suppressing method of resistance, this method is very easy to realize in Overhaul site, and inhibitory effect is obvious.
Detailed description of the invention
Fig. 1 is transfer current equivalent circuit
Specific embodiment
According to machine overhauling equipotential operating process is gone straight up to, pulse transfer current access equivalent circuit as shown in Figure 1 can be established
Model, capacitor C1Analog conducting wire is to helicopter capacitor, C2Helicopter simulating direct-to-ground capacitance, R analog conducting wire discharge to electric potential transferring stick
When arc channel equivalent resistance.
If puncturing moment t0For 0 moment, AC supply voltageAfter remembering that K1 closes a floodgate, resistance R electric current is
i1, capacitor C2Electric current is i2, capacitor C1Electric current is i3, electric current positive direction is set as by left-to-right.Then have,
i1+i3=i2 (1)
WhereinSimultaneous obtains,
Simultaneous (2), (5) obtain,
It (6) is First order linear non-homogeneous differential equation, solution obtains,
NoteC is by i1The constant that initial value determines, according to,
By (7) it is found that pulse transfer current amplitude is by coefficient k2It is affected, k2Influence factor is more, but to a reality
For overhauling route, voltage class, frequency and distributed capacitance are all difficult to change, it is easy to accomplish the ginseng of Field adjustment
Number is arc channel resistance R, and arc channel resistance is bigger, then pulse current amplitude is lower, theoretically when arc channel resistance increases
It is 10 times big, pulse transfer current peak value can be reduced and reach 10%.Since arc channel resistance itself can not change, the present invention
By the series resistance between electric potential transferring stick and helicopter platform, can play the role of being equivalent to increase arc channel resistance.
Arc channel resistance resistance value itself is smaller, and generally at several ohm, therefore 100 Ω resistance of connecting can obviously inhibit transfer current peak
Value.
Claims (2)
1. a kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing method characterized by comprising
Step 1, according to machine overhauling equipotential operating process is gone straight up to, pulse transfer current access equivalent-circuit model is established, in conjunction with
Its transfer current functional expression is calculated in Circuit theory, is specifically based on following formula:
Puncture moment t0For 0 moment, AC supply voltageAfter remembering that K1 closes a floodgate, resistance R electric current is i1, capacitor
C2Electric current is i2, capacitor C1Electric current is i3,
NoteC is by i1The constant that initial value determines, according to
,
Wherein, capacitor C1Analog conducting wire is to helicopter capacitor, C2Helicopter simulating direct-to-ground capacitance, R analog conducting wire is to electric potential transferring stick
Arc channel equivalent resistance when electric discharge,
By (1) it is found that pulse transfer current amplitude is by coefficient k2It is affected, k2Influence factor is more, but to a practical maintenance
For route, voltage class, frequency and distributed capacitance are all difficult to change, it is easy to accomplish the parameter of Field adjustment is
Arc channel resistance R, arc channel resistance is bigger, then pulse current amplitude is lower, theoretically when arc channel resistance increases 10
Times, pulse transfer current peak value can be reduced and reach 10%；
Step 2 analyzes upper transfer current functional expression, clearly influences the relevant parameter of its amplitude, and consider transmission line of electricity
Overhaul site actual condition, the feasibility of more each parameter regulation, change transfer current arc channel resistance be it is the easiest and
Effective restriction solves to transmit electricity by the method for the series resistance between electric potential transferring stick end and helicopter workbench
Amplitude transfer pulse electric current is led to the problem of when route helicopter hotline maintenance equipotential, particular by electric potential transferring stick
The series resistance between helicopter platform can play the role of being equivalent to increase arc channel resistance.
2. a kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current inhibition side according to claim 1
Method, which is characterized in that arc channel resistance resistance value itself is small in step 2, and 100 Ω resistance of series connection are able to suppress transfer current peak
Value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811613427.3A CN109494619A (en) | 2018-12-27 | 2018-12-27 | A kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing method |
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| CN201811613427.3A CN109494619A (en) | 2018-12-27 | 2018-12-27 | A kind of transmission line of electricity helicopter hotline maintenance equipotential transfer pulse electric current suppressing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636319A (en) * | 2020-11-27 | 2021-04-09 | 中国电力科学研究院有限公司 | Method and system for suppressing electromagnetic interference in robot by using variable resistor |
| CN114597814A (en) * | 2022-02-25 | 2022-06-07 | 长沙理工大学 | Potential transfer model modeling and parameter control method of live working robot |
Citations (3)
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| CN103901303A (en) * | 2014-03-27 | 2014-07-02 | 国家电网公司 | Testing device and method for current measuring in potential shifting process of helicopter extra-high-voltage hot-line work |
| CN105576554A (en) * | 2016-01-15 | 2016-05-11 | 中国电力科学研究院 | Control device and method for ultrahigh-voltage live working potential transfer current and arc |
| CN108899797A (en) * | 2018-06-15 | 2018-11-27 | 中国电力科学研究院有限公司 | The device and method for controlling the potential transfer electric current and electric arc of extra-high voltage electrified operation |
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2018
- 2018-12-27 CN CN201811613427.3A patent/CN109494619A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901303A (en) * | 2014-03-27 | 2014-07-02 | 国家电网公司 | Testing device and method for current measuring in potential shifting process of helicopter extra-high-voltage hot-line work |
| CN105576554A (en) * | 2016-01-15 | 2016-05-11 | 中国电力科学研究院 | Control device and method for ultrahigh-voltage live working potential transfer current and arc |
| CN108899797A (en) * | 2018-06-15 | 2018-11-27 | 中国电力科学研究院有限公司 | The device and method for controlling the potential transfer electric current and electric arc of extra-high voltage electrified operation |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636319A (en) * | 2020-11-27 | 2021-04-09 | 中国电力科学研究院有限公司 | Method and system for suppressing electromagnetic interference in robot by using variable resistor |
| CN112636319B (en) * | 2020-11-27 | 2022-05-20 | 中国电力科学研究院有限公司 | Method and system for restraining electromagnetic interference in robot by using variable resistor |
| CN114597814A (en) * | 2022-02-25 | 2022-06-07 | 长沙理工大学 | Potential transfer model modeling and parameter control method of live working robot |
| CN114597814B (en) * | 2022-02-25 | 2024-02-13 | 长沙理工大学 | Potential transfer model modeling and parameter control method for live working robot |
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Application publication date: 20190319 |