CN201682247U - Voltage adjustable direct-current deicing device for power transmission lines - Google Patents

Voltage adjustable direct-current deicing device for power transmission lines Download PDF

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Publication number
CN201682247U
CN201682247U CN201020189053XU CN201020189053U CN201682247U CN 201682247 U CN201682247 U CN 201682247U CN 201020189053X U CN201020189053X U CN 201020189053XU CN 201020189053 U CN201020189053 U CN 201020189053U CN 201682247 U CN201682247 U CN 201682247U
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CN
China
Prior art keywords
voltage
output
power transmission
transmission line
ice
Prior art date
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Expired - Fee Related
Application number
CN201020189053XU
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Chinese (zh)
Inventor
陆佳政
李波
谭艳军
方针
张红先
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.)
State Grid Hunan Electric Power Co Ltd
Disaster Prevention and Mitigation Center of State Grid Hunan Electric Power Co Ltd
Original Assignee
Hu'nan Huicui Electric Power Technology Co Ltd
HUNAN INSTITUTE OF POWER Co EXPERIMENT
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Publication date
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Priority to CN201020189053XU priority Critical patent/CN201682247U/en
Application granted granted Critical
Publication of CN201682247U publication Critical patent/CN201682247U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides a voltage adjustable direct-current deicing device for power transmission lines. The deicing device consists of a three-phase voltage regulator (1), an induced voltage suppression component (2), a six-pulse rectifier (3) and a voltage regulating system (4) which are in series connection. An output end of the three-phase voltage regulator (1) is connected with an input end of the six-pulse rectifier (3) while an input end is connected with an output end of the voltage regulating system (4). One end of the induced voltage suppression component (2) is connected with an anode of an output end of the six-pulse rectifier (3) while the other end is connected with a cathode of the output end of the six-pulse rectifier (3). When in use, a direct-current power supply can be arranged on a power transmission line covered with ice to heat to deice. The voltage adjustable direct-current deicing device is applicable to deicing of power transmission lines covered with ice within 2 kilometers, prevents breakage of power transmission line and avoids poles from collapsing, can realize normal rectifying of lines with induced voltage and reduce power supply capacity greatly, eliminates complicated operation and reduces potential safety hazards.

Description

Adjustable pressure transmission line DC de-icing device
Technical field
The utility model belongs to the electrical engineering technical field, relates in particular to a kind of adjustable pressure transmission line DC de-icing device, and this device is applicable to that the DC ice melting of transmission line in 2 kilometers of the icing handles.
Background technology
In recent years, cause transmission line that broken string takes place because of icing even fall the serious accident of tower and take place repeatedly.For example occur in the electrical network ice damage that Hunan China is economized in January, 2008, promptly cause a large amount of transmission line broken strings of falling the tower, billions of yuans of direct economic losses, and had a strong impact on the safe operation of electrical network and the masses' normal life.Therefore, form at transmission line and in time it to be carried out ice-melt in the icing and handle, peel off or eliminate icing, prevent that circuit from falling tower and broken string, guarantees that the safe operation of transmission line is very necessary.Yet the deicer that adopts is a kind of deicing device and novel 10kV power supply DC de-icing device that utilizes the design of ac short circuit method at present.Adopt the deicing device of ac short circuit method design will apply circuit series connection coupling, load transfer and a large amount of on-the-spot grid switching operations; very complicated; operating difficulties can not launch ice-melt work, so be difficult to protect effectively the security of operation of electrical network comprehensively and effectively on electrical network.Adopt novel 10kV power supply DC de-icing device excessive, can cause transmission line to damage, can't satisfy the ice-melt work of short distance transmission line at transmission line ice-melt overtension in 2 kilometers, electric current.
The utility model content
The technical problem to be solved in the present invention is, at the backward situation of prior art, designs a kind of ice-melt demand that can satisfy 500kV and following transmission line, and small investment simple in structure, processing ease, DC de-icing device easy to maintenance.
The technical problems to be solved in the utility model is, backward situation at prior art, design a kind of adjustable pressure transmission line DC de-icing device, ice-melt after utilizing this device to short distance powerline ice-covering in 2 kilometers is handled, do not need circuit series connection coupling can realize the changeable power station of full electric network, the ice-melt simultaneously of many transmission lines, also can reduce on-the-spot grid switching operation, avoid network load to shift.
Technical solution of the present utility model is, above-mentioned adjustable pressure transmission line DC de-icing device, and referring to Fig. 1, it suppresses parts 2, six pulse wave rectifier devices 3 and voltage-regulating system 4 by three-phase regulator 1, induced voltage and is composed in series.The output electricity of wherein said three-phase regulator 1 connects the input of described six pulse wave rectifier devices 3, and the input electricity of described three-phase regulator 1 connects the output of described voltage-regulating system 4.The two ends that described induced voltage suppresses parts 2 a wherein end electricity connect the positive pole of the output of described six pulse wave rectifier devices 3, and other end electricity connects the negative pole of the output of described six pulse wave rectifier devices 3.
Operation principle of the present utility model is: when the powerline ice-covering, its three-phase regulator 1 can be inserted 380V three phase mains in the electrical network by switch by above the utility model that constitutes.Utilize three-phase regulator 1 and can eliminate two kinds of functions that produce harmonic wave in the switching process, ensure DC de-icing device, thereby reduce the decline of the electrical network quality of power supply that causes because of rectification to electrical network conveying harmonic wave with 380V voltage pressure regulation to 0~380V output.Above-mentioned three phase mains enters six pulse wave rectifier devices 3 after three-phase regulator 1 rectification.Induced voltage suppresses parts 2 and brings into play the effect that prevents the normal rectification of induced voltage obstruction rectifier at once, thereby ensures the operate as normal of six pulse wave rectifier devices 3.Six pulse wave rectifier devices 3 change into DC power supply with three-phase alternating-current supply, then this DC power supply are added on the transmission line, utilize the heating effect after the lead energising to melt icing.Different at the line style of kilometer transmission lines in 2 and length, can utilize 4 pairs of above-mentioned three-phase regulators of voltage-regulating system to regulate, to guarantee that the output DC source can meet design requirement, the direct current that prevents overtension burns out lead, prevents that also the direct current of brownout from can't melt the ice sheet on the lead simultaneously.
Use this adjustable pressure transmission line DC de-icing device of the present utility model and can reduce the ice-melt power supply capacity greatly.Chang Yong LGJ400 type lead for example, its resistance is 0.074 ohm/kilometer, and its reactance is 0.415 ohm/kilometer, and calculating its impedance is 0.422 ohm/kilometer.So when transmission line length was 1 kilometer, if getting ice melting current is 1000 amperes, then desired volume was 422 * 10 3Volt-ampere adopts the ice-melt of this device, and reactance is inoperative, and when ice melting current still is 1000 ampere-hours, desired volume is 74 * 10 3The volt-ampere, only be traditional deicing device capacity 1/6.
This device is applicable to that the DC ice melting of transmission line in 2 kilometers of the icing handles, to avoid behind 0-2 kilometer powerline ice-covering broken string even the accident of falling the tower taking place.
The beneficial effects of the utility model are:
1), regulate by system, can implement ice-melt to different length transmission line in 2 kilometers handles;
2), can make transmission line that also normally rectification under the induction voltage condition is being arranged;
3), owing to adopt DC power supply to carry out ice-melt, the reactive component of transmission line is with inoperative, so can make the capacity of ice-melt power supply reduce greatly;
4), avoided the troublesome operation of traditional ice-melting modes such as unnecessary circuit serial connection and load transfer, thereby greatly reduce issuable thus security risk;
5), a difficult problem that makes traditional ice-melting mode and 10kV DC ice melting mode can't implement ice-melt to transmission line in 2 kilometers achieves a solution finally.
Description of drawings
Fig. 1 is the structured flowchart of a specific embodiment of the adjustable pressure transmission line DC de-icing device of the utility model, is denoted as among the figure:
The 1-three-phase regulator,
The 2-induced voltage suppresses parts,
3-six pulse wave rectifier devices,
The 4-voltage-regulating system.
Embodiment
Embodiment: the adjustable pressure transmission line DC de-icing device of this embodiment of the utility model, as shown in Figure 1, its Chinese Hubei Province of three-phase regulator 1 employing continues, and new extraordinary electric limited company produces the TSYG-253KVA type, capacity is the three-phase regulator of 253kVA; Its induced voltage suppresses parts 2 and adopts Hunan China to economize the induced voltage suppressor that the pure Power Tech Corp. Inc. of remittance produces R-8500 type, capacity 19kW, rated voltage 10kV; Its six pulse wave rectifier devices 3 select for use Hunan China to economize the dc rectifier of the 224kW-1400A/160V type of pure Power Tech Corp. Inc. of remittance and the joint research and development exploitation of the safe energy of Chinese Zhuzhou Hetang District special transformer factory, input voltage 128V, output dc voltage 160V, rated direct current 1400A; And its voltage-regulating system 4 is also economized the TYQKZ-2009 type control system that the pure Power Tech Corp. Inc. of remittance develops for Hunan China.Above-mentioned three-phase regulator 1, induced voltage suppress parts 2, six pulse wave rectifier devices 3 and voltage-regulating system 4 by above-mentioned technical solution with reference to the circuit shown in Figure 1 composition that is connected in series.Promptly wherein the output electricity of three-phase regulator 1 connects the input of six pulse wave rectifier devices 3, and the input electricity of three-phase regulator 1 connects the output of voltage-regulating system 4.One end electricity of induced voltage inhibition parts 2 connects the positive pole of the output of six pulse wave rectifier devices 3, and other end electricity connects the negative pole of the output of six pulse wave rectifier devices 3.
By the above of the present utility model adjustable pressure transmission line DC de-icing device that constitutes, respond well, esy to use, safe and reliable through the trial-production probationary certificate, reach designing requirement fully.

Claims (1)

1. adjustable pressure transmission line DC de-icing device, it is characterized in that, it is by three-phase regulator (1), induced voltage suppresses parts (2), six pulse wave rectifier devices (3) and voltage-regulating system (4) are composed in series, the output electricity of wherein said three-phase regulator (1) connects the input of described six pulse wave rectifier devices (3), the input electricity of described three-phase regulator (1) connects the output of described voltage-regulating system (4), the two ends that described induced voltage suppresses parts (a 2) wherein end electricity connect the positive pole of the output of described six pulse wave rectifier devices (3), and other end electricity connects the negative pole of the output of described six pulse wave rectifier devices (3).
CN201020189053XU 2010-05-13 2010-05-13 Voltage adjustable direct-current deicing device for power transmission lines Expired - Fee Related CN201682247U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020189053XU CN201682247U (en) 2010-05-13 2010-05-13 Voltage adjustable direct-current deicing device for power transmission lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020189053XU CN201682247U (en) 2010-05-13 2010-05-13 Voltage adjustable direct-current deicing device for power transmission lines

Publications (1)

Publication Number Publication Date
CN201682247U true CN201682247U (en) 2010-12-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102590664A (en) * 2012-02-08 2012-07-18 湖南省电力公司科学研究院 Low-voltage large-current testing platform of direct-current ice melting device
CN102684128A (en) * 2012-06-01 2012-09-19 湖南省电力公司科学研究院 Portable ultra-short agricultural distribution network DC ice melting device
CN102680840A (en) * 2012-06-01 2012-09-19 湖南省电力公司科学研究院 Voltage continuously adjustable no-load test device for ice melting rectifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102590664A (en) * 2012-02-08 2012-07-18 湖南省电力公司科学研究院 Low-voltage large-current testing platform of direct-current ice melting device
CN102684128A (en) * 2012-06-01 2012-09-19 湖南省电力公司科学研究院 Portable ultra-short agricultural distribution network DC ice melting device
CN102680840A (en) * 2012-06-01 2012-09-19 湖南省电力公司科学研究院 Voltage continuously adjustable no-load test device for ice melting rectifier

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Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha

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Address before: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha

Patentee before: Science Research Institute of Hunan Electric Power Co., Ltd.

Patentee before: Hu'nan Huicui Electric Power Technology Co., Ltd.

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Patentee after: State Grid Hunan Electric Power Company prevents and reduces natural disasters center

Patentee after: Electric Power Research Institute, State Grid Hunan Electric Power Company

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