CN202042863U - Power frequency online anti-icing and de-icing device for electric power transmission line - Google Patents
Power frequency online anti-icing and de-icing device for electric power transmission line Download PDFInfo
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- CN202042863U CN202042863U CN2011201613457U CN201120161345U CN202042863U CN 202042863 U CN202042863 U CN 202042863U CN 2011201613457 U CN2011201613457 U CN 2011201613457U CN 201120161345 U CN201120161345 U CN 201120161345U CN 202042863 U CN202042863 U CN 202042863U
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Abstract
Provided is a power frequency online anti-icing and de-icing device for an electric power transmission line. Three sets of dynamic reactive power compensation devices are connected with a power transmission line arranged between a left side substation and a right side substation which are adjacent, a temperature sensor is arranged on the power transmission line, when temperature detected by the temperature sensor is below 0 DEG C, a controller controls the three sets of dynamic reactive power compensation devices to enter an anti-icing and de-icing working state, namely, a left side reactive power compensation device generates capacitive reactive current, a right side dynamic reactive power compensation device generates the capacitive reactive current, and a middle dynamic reactive power compensation device generates inductive reactive current. The power frequency online anti-icing and de-icing device for electric power transmission line can automatically conduct anti-icing and de-icing under the situation that circuits are not out of service, and power supply is not affected, guarantees the fact that the circuits are not iced up, ensures stability and safety of an electric-power power supply system under extreme weather including ice rain, ice and snow and the like and improves economical efficiency of operation of the electric power system.
Description
Technical field
The utility model relates to the online anti-icing deicing device of a kind of electric power transmission line power frequency.
Background technology
Because China is former vast, therefore be one of the most serious country of powerline ice-covering in the world.The serious icing of transmission line can cause transmission line machinery and electric property sharply to descend, and causes the generation of accident.The powerline ice-covering accident all once took place in provinces such as China Hunan, Hubei, Guizhou, Jiangxi, Yunnan, Sichuan, Henan and Shaanxi, the icing accident serious threat the safe operation of electric power system, and caused enormous economic loss.
The main harm of wire icing has: 1. cross load.It is a lot of that the actual weight of wire icing thickness surpasses design load, thereby cause overhead transmission line the accident of machinery and electric aspect to occur.2. do not deice the same period or inhomogeneous icing accident.The inhomogeneous icing of adjacent wires or do not deice the generation Tension Difference same period slides lead, ground wire in wire clamp, wire external layer aluminium thigh will be twitched at wire clamp exit complete rupture, steel core.3. ice insulator sudden strain of a muscle accident.Covering ice for insulator or by behind the ice slush bridge joint, dielectric strength descends, and leakage distance shortens, and the local surfaces resistance of insulator increases during ice-melt, forms flashover fault, and sustained arc burn insulator in the flashover evolution causes that insulator dielectric intensity reduces.4. wire icing is waved accident.Lead is waved because of inhomogeneous icing produces under wind action, and the low frequency high-amplitude of ice coating wire is waved serious accidents such as causing metal parts damages, the disconnected thigh of lead, phase fault, shaft tower tilts or collapse.
For guaranteeing the safety of transmission line, multiple anti-icing and deicing method has been proposed at present: thermal ice-melting, mechanical deicing etc. both at home and abroad.What use morely now is the heating de-icing technology, it is to disconnect at transmission line and electric substation, under the situation of stopping power supply, the three-phase of transmission line is short circuit at one end, the other end links to each other with reactive-load compensator, power to reactive-load compensator by DC power supply, enough big alternating current is injected transmission line, form ac circuit by reactive-load compensator.Make the ice-melt of circuit heating realization to the alternating current circuit.This de-icing method, transmission line is not worked (not to the load transmission of electricity) during ice-melt, influences normal power supply, and complicated operation.
The utility model content
The purpose of this utility model just provides the online anti-icing deicing device of a kind of electric power transmission line power frequency, this method can not stopped transport at circuit, do not influenced under the situation of power supply and carries out anti-icing ice-melt automatically, guarantee not freeze on the circuit, guarantee under extreme hazard weather situation such as sleet and ice and snow, stable, the safety of power supply system, the economy of raising power system operation.
The utility model solves its technical problem, and the technical scheme that is adopted is: the online anti-icing deicing device of a kind of electric power transmission line power frequency, and its composition is:
Connect left side, right side, middle dynamic reactive compensation device on adjacent left side electric substation and the transmission line between the electric substation of right side, left side, right side, middle dynamic reactive compensation device lay respectively at by the electric substation of left side, right side electric substation is other and two electric substations in the middle of, also be provided with temperature sensor on transmission line, temperature sensor links to each other with the controller of left side, right side, middle dynamic reactive compensation device.
The course of work of the present utility model and operation principle are:
Temperature sensor monitors is to the temperature of power transmission line, and when detected temperature was lower than 0 ℃, controller was controlled dynamic three cover reactive power compensators and entered anti-icing ice-melt operating state by the reactive power compensation operating state:
The left side reactive power compensator produces the capacitive reactive power electric current
, the capacitive reactive power electric current
Value and the current electric current that flows through of this transmission line upper left side
Sum is
,
Amplitude is the value that is enough to make the icing on the circuit to melt;
The right side dynamic reactive compensation device produces the capacitive reactive power electric current
, the capacitive reactive power electric current
Value and this transmission line on the current electric current that flows through in right side
Sum is
,
Amplitude is the value that is enough to make the icing on the circuit to melt;
Middle dynamic reactive compensation device produces the inductive reactive current
,
Also promptly: under normal circumstances, dynamic reactive compensation device carries out reactive power compensation to transmission line, suppresses harmonic wave, improves power factor, improves voltage stability.When temperature reduces, the temperature detection value that the temperature sensor that control receives is sent here is lower than 0 ℃, when circuit may freeze, dynamic reactive compensation device entered anti-icing ice-melt operating state: the dynamic reactive compensation device by controller control both sides produces the capacitive reactive power electric current
, and middle dynamic reactive compensation device produces the inductive reactive current
, and perceptual reactive current
By with two capacitive reactive power electric currents
Two perceptual weights equating of amplitude constitute.Thereby constitute left side reactive current closed circuit by the left side capacitive reactive power electric current perceptual weight corresponding between the dynamic reactive compensation device of left side dynamic reactive compensation device and centre with middle reactive power compensator.Even also these reactive currents only flow in the closed circuit between transmission line and dynamic reactive compensation device, and can or seldom not flow to load, thereby can not influence the normal power supply of transmission line to load.Simultaneously, normal transmission current sum is enough big on reactive current that flows through on the loop and the power transmission line, will produce enough joule's heat energies on transmission line, makes circuit can not freeze or melt existing icing.In like manner, the right side reactive power compensator carries out anti-icing ice-melt in the corresponding way to the transmission line on right side.
Compared with prior art, the beneficial effects of the utility model are:
One, this method forms two reactive current loops by dynamic reactive compensation device and transmission line under the situation that does not have a power failure, make the electric current that flows through on the transmission line enough, produce the Joule heat of capacity, anti-icing efficiently ice-melt under the situation that does not influence power supply well guarantees the safety and stablization of transmission line under the weather of ice and snow severe cold.
Two, this method adopts controlled power electronic device, and automatic inspection line road temperature automatically enters anti-icing ice-melt operating state, has improved the reliability of transmission line work, has guaranteed the stability and the fail safe of power supply system.Need not manual operation, easy to use.
Three, in the season that does not need anti-icing ice-melt, reactive power compensator then normally carries out quality of power supply compensation, with harmonic carcellation, improves power factor.
Above-mentioned left side, right side, middle dynamic reactive compensation device are by the step-down transformer that is connected on the three-phase circuit, with the high-power electric and electronic switch that step-down transformer time limit respectively is connected, the high-power electric and electronic switch of each phase of inferior limit formation in parallel with dc energy storage electric capacity.
The utility model will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of the dynamic reactive compensation device of the utility model embodiment 1.
Embodiment
Embodiment 1
Fig. 1 illustrates, and a kind of embodiment of the present utility model is: the online anti-icing deicing device of a kind of electric power transmission line power frequency, and its composition is:
Adjacent left side electric substation and the SS of right side electric substation
M, SS
PBetween transmission line on connect left side, right side, middle dynamic reactive compensation device SVG
M, SVG
P, SVG
N, left side, right side, middle dynamic reactive compensation device SVG
M, SVG
P, SVG
NLay respectively at the left side SS of electric substation
MOther, the SS of right side electric substation
PSide and two SS of electric substation
M, SS
PThe centre also is provided with temperature sensor on transmission line, temperature sensor and left side, right side, middle dynamic reactive compensation device SVG
M, SVG
P, SVG
NController link to each other.
Fig. 2 illustrates, and the dynamic reactive compensation device SVG in this example is by the step-down transformer Ts that is connected on the three-phase circuit, the high-power electric and electronic switch S that links to each other with step-down transformer Ts, and the dc energy storage capacitor C that links to each other with the high-power electric and electronic switch S constitutes.
Fig. 1 also illustrates, and the course of work and operation principle that this is routine are:
Temperature sensor monitors is to the temperature of power transmission line, and when detected temperature was lower than 0 ℃, controller was controlled dynamic three cover reactive power compensators and entered anti-icing ice-melt operating state by the reactive power compensation operating state:
The left side reactive power compensator produces the capacitive reactive power electric current
The capacitive reactive power electric current
Value and the current electric current that flows through of this transmission line upper left side
Sum is
Amplitude is the value that is enough to make the icing on the circuit to melt;
The right side dynamic reactive compensation device produces the capacitive reactive power electric current
The capacitive reactive power electric current
Value and this transmission line on the current electric current that flows through in right side
Sum is
Amplitude is the value that is enough to make the icing on the circuit to melt;
Middle dynamic reactive compensation device produces the inductive reactive current
Also promptly: under normal circumstances, dynamic reactive compensation device carries out reactive power compensation to transmission line, suppresses harmonic wave, improves power factor, improves voltage stability.When temperature reduces, the temperature detection value that the temperature sensor that control receives is sent here is lower than 0 ℃, when circuit may freeze, dynamic reactive compensation device entered anti-icing ice-melt operating state: the dynamic reactive compensation device by controller control both sides produces the capacitive reactive power electric current
And middle dynamic reactive compensation device produces the inductive reactive current
And perceptual reactive current
By with two capacitive reactive power electric currents
Two perceptual weights equating of amplitude constitute.Thereby constitute left side reactive current closed circuit by the left side capacitive reactive power electric current perceptual weight corresponding between the dynamic reactive compensation device of left side dynamic reactive compensation device and centre with middle reactive power compensator.Even also these reactive currents only flow in the closed circuit between transmission line and dynamic reactive compensation device, and can or seldom not flow to load, thereby can not influence the normal power supply of transmission line to load.Simultaneously, normal transmission current sum is enough big on reactive current that flows through on the loop and the power transmission line, will produce enough joule's heat energies on transmission line, makes circuit can not freeze or melt existing icing.In like manner, the right side reactive power compensator carries out anti-icing ice-melt in the corresponding way to the transmission line on right side.
Claims (2)
1. online anti-icing deicing device of electric power transmission line power frequency is characterized in that:
Adjacent left side electric substation and the (SS of right side electric substation
M, SS
P) between transmission line on connect left side, right side, middle dynamic reactive compensation device (SVG
M, SVG
P, SVG
N), left side, right side, middle dynamic reactive compensation device (SVG
M, SVG
P, SVG
N) lay respectively at the left side (the SS of electric substation
M) the other, (SS of right side electric substation
P) the other and two (SS of electric substation
M, SS
P) in the middle of, on transmission line, also be provided with temperature sensor, temperature sensor and left side, right side, middle dynamic reactive compensation device (SVG
M, SVG
P, SVG
N) controller link to each other.
2. the online anti-icing deicing device of a kind of electric power transmission line power frequency as claimed in claim 1 is characterized in that: described left side, right side, middle dynamic reactive compensation device (SVG
M, SVG
P, SVG
N) by the step-down transformer (Ts) that is connected on the three-phase circuit, with the high-power electric and electronic switch (S) that the inferior limit of step-down transformer (Ts) respectively is connected, the high-power electric and electronic switch (S) of each phase of inferior limit and dc energy storage electric capacity (C) formation in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201613457U CN202042863U (en) | 2011-05-19 | 2011-05-19 | Power frequency online anti-icing and de-icing device for electric power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201613457U CN202042863U (en) | 2011-05-19 | 2011-05-19 | Power frequency online anti-icing and de-icing device for electric power transmission line |
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| Publication Number | Publication Date |
|---|---|
| CN202042863U true CN202042863U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201613457U Expired - Fee Related CN202042863U (en) | 2011-05-19 | 2011-05-19 | Power frequency online anti-icing and de-icing device for electric power transmission line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174829A (en) * | 2018-07-23 | 2019-01-11 | 中国电力科学研究院有限公司 | The long-range snow-removing method of extra-high voltage equipment based on hot wind snow-removing device |
-
2011
- 2011-05-19 CN CN2011201613457U patent/CN202042863U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174829A (en) * | 2018-07-23 | 2019-01-11 | 中国电力科学研究院有限公司 | The long-range snow-removing method of extra-high voltage equipment based on hot wind snow-removing device |
| CN109174829B (en) * | 2018-07-23 | 2021-08-24 | 中国电力科学研究院有限公司 | Extra-high voltage equipment remote snow removing method based on hot air snow removing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160616 Address after: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111 Patentee after: Southwest Jiaotong University Patentee after: Li Qunzhan Address before: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111 Patentee before: Southwest Jiaotong University |
|
| 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: 20111116 Termination date: 20190519 |