CN109449853A - A kind of distribution line ice melting system and deicing device reconnaissance method - Google Patents

A kind of distribution line ice melting system and deicing device reconnaissance method Download PDF

Info

Publication number
CN109449853A
CN109449853A CN201810249477.1A CN201810249477A CN109449853A CN 109449853 A CN109449853 A CN 109449853A CN 201810249477 A CN201810249477 A CN 201810249477A CN 109449853 A CN109449853 A CN 109449853A
Authority
CN
China
Prior art keywords
ice
line
detection module
deicing
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810249477.1A
Other languages
Chinese (zh)
Inventor
赵建文
傅颖
杨成钢
王笑棠
金华芳
屈天天
刘杨
赵汉鹰
林峰
罗旻
韩磊
赵阳
陈扬哲
苏恺
宋艳
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 Corp of China SGCC
Lishui Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Lishui Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Lishui Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201810249477.1A priority Critical patent/CN109449853A/en
Publication of CN109449853A publication Critical patent/CN109449853A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00Overhead installations of electric lines or cables
    • H02G7/16Devices for removing snow or ice from lines or cables
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • H02J13/0013Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0017Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with direct transmission between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0075Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with direct transmission between the control or monitoring unit and the controlled or monitored unit using radio means

Abstract

The invention discloses a kind of distribution line ice melting system and deicing device reconnaissance methods.The system includes control centre and the ice-melt terminal that is mounted on feeder line, ice-melt terminal includes controller, wireless communication module, deicing device, environment monitoring device and pressure line monitoring device, environment monitoring device includes Temperature Humidity Sensor, air velocity transducer and ice covering thickness detection module, pressure line monitoring device includes line temperature detection module, line current detection module, line voltage distribution detection module and line power detection module, controller respectively with wireless communication module, deicing device, Temperature Humidity Sensor, air velocity transducer, ice covering thickness detection module, line temperature detection module, line current detection module, line voltage distribution detection module and the electrical connection of line power detection module, wireless communication module can be wirelessly communicated with control centre.Distribution line ice-melt can be realized automatically in the present invention, avoids icing risk, guarantees system safe and reliable operation.

Description

A kind of distribution line ice melting system and deicing device reconnaissance method
Technical field
The present invention relates to technical field of power systems more particularly to a kind of distribution line ice melting system and deicing device reconnaissances Method.
Background technique
Lishui City is located in mountain area, in 08 year ice damage, is damaged serious.From on January 13rd, 2008, a rare ice damage evil Attack southern china suddenly.According to statistics, ice damage causes the full institute's power loss of 1 35 KV substation of Lishui city Liandu District power grid, 35 kilovolts Overhead line structures (disconnected) fall 17 bases, 10 KV line shaft towers (disconnected) and fall 283 bases, low-voltage circuit bar (disconnected) to fall 256 bases, power supply line disconnected Line is more than 200 kilometers accumulative.One time, the natural village of Liandu District 205,23027 families, the hardship that more than totally 78 thousand people are powered off, and it is beautiful The Jinyun Shui Shi county part distribution line is located at the higher mountain area of height above sea level, disaster-stricken even more serious.
It is existing it is anti-icing, de-icing method is although varied, but it is universal energy consumption is high, safety is low, up to the present, there is no One mature, effective and economic method is applied to engineering practice.
Summary of the invention
The present invention to solve the above-mentioned problems, provides a kind of distribution line ice melting system and deicing device reconnaissance method, Distribution line ice-melt can be realized automatically in it, avoids icing risk, guarantees system safe and reliable operation.
To solve the above-mentioned problems, the present invention is achieved by the following scheme:
A kind of distribution line ice melting system of the invention, it is whole including control centre and the ice-melt being mounted on feeder line End, the ice-melt terminal includes controller, wireless communication module, deicing device, environment monitoring device and pressure line monitoring device, institute Stating environment monitoring device includes Temperature Humidity Sensor, air velocity transducer and ice covering thickness detection module, the pressure line monitoring device It is described including line temperature detection module, line current detection module, line voltage distribution detection module and line power detection module Controller respectively with wireless communication module, deicing device, Temperature Humidity Sensor, air velocity transducer, ice covering thickness detection module, line Road temperature detecting module, line current detection module, line voltage distribution detection module and the electrical connection of line power detection module, wirelessly Communication module can be wirelessly communicated with control centre.
In the technical scheme, module and control centre wirelessly communicate ice-melt terminal by wireless communication, by environmental monitoring Device and the collected data of pressure line monitoring device upload to control centre.
Ice covering thickness detection module detects route ice covering thickness, and Temperature Humidity Sensor detects ambient temperature and humidity, wind speed sensing Device detects ambient wind velocity, and line temperature detection module detects line temperature, and line current detection module detects line current, route Voltage detection module detects line voltage distribution, and line power detection module detects active power, reactive power, power factor.
Controller acquires data by environment monitoring device, pressure line monitoring device.When transmission line icing thickness is more than setting value When, controller calculates ice melting current according to detection data, and control deicing device exports corresponding electric current ice-melt.
Preferably, the ice-melt terminal further includes liquid crystal display and key, the controller respectively with liquid crystal display Device and key electrical connection.Liquid crystal display and key are as human-computer interaction interface.
Preferably, the ice-melt terminal further includes several indicator lights, the controller is electrically connected with indicator light.
Preferably, the environment monitoring device further includes camera, the camera is electrically connected with the controller.Camera Acquire ambient enviroment image data and transmission line icing image data.
Preferably, the ice-melt terminal further includes bluetooth module, the bluetooth module is electrically connected with the controller.Work people Member can be by smart phone and its work of ice-melt terminal communication control, without passing through button operation.
Preferably, controller acquires data by environment monitoring device, pressure line monitoring device, ice melting current-is calculated Time curve, control deicing device export corresponding electric current ice-melt, ice melting current-time curve feature expression Are as follows:
Wherein,IrFor ice melting current, R0Conductor resistance when being 0 DEG C, TrFor the ice-melt time, Δ t is to lead The difference of temperature and outside air temperature, g0For the specific gravity of ice, b is ice layer thickness, and D is the outer diameter after conductor icing, RT0For equivalent ice Layer thermal-conduction resistance, d is diameter of wire, LnFor conductor length, λ is thermal coefficient, RTFor convection current and radiological equivalent thermal resistance.
The deicing device reconnaissance method of a kind of distribution line ice melting system of the invention, for a kind of above-mentioned distribution line Ice melting system, comprising the following steps:
S1: carrying out Load flow calculation, and the voltage and current of the route of different location is analyzed according to calculation of tidal current;
S2: the actual environment data, reactive factor and active power factor of various regions are acquired, finds out and meets deicing device The place of fixed condition;
The deicing device fixed condition are as follows: the first and last section voltage of route is no more than 10.7V and deicing device and main feed The distance of line head end is less than setting value LnAnd line current meet the affiliated wire type of route under environment temperature ice melting current value, Protect line current value;
S3: after choosing deicing device dispensing place, the situation under simulated scenario is simulated, verifies whether this reconnaissance closes It is suitable.
Preferably, calculating L according to ice melting current-time curve feature expressionn, ice melting current-time pass It is that curvilinear characteristic expression formula is as follows:
Wherein,IrFor ice melting current, R0Conductor resistance when being 0 DEG C, TrFor the ice-melt time, Δ t is to lead The difference of temperature and outside air temperature, g0For the specific gravity of ice, b is ice layer thickness, and D is the outer diameter after conductor icing, RT0For equivalent ice Layer thermal-conduction resistance, d is diameter of wire, LnFor conductor length, λ is thermal coefficient, RTFor convection current and radiological equivalent thermal resistance.
The beneficial effects of the present invention are: distribution line ice-melt can be realized automatically in (1), icing risk is avoided, guarantees system Safe and reliable operation.(2) deicing device is installed in optimal location.
Detailed description of the invention
Fig. 1 is a kind of circuit theory connection block diagram of the invention.
In figure: 1, control centre, 2, controller, 3, wireless communication module, 4, deicing device, 5, environment monitoring device, 6, Pressure line monitoring device, 7, Temperature Humidity Sensor, 8, air velocity transducer, 9, ice covering thickness detection module, 10, line temperature detection mould Block, 11, line current detection module, 12, line voltage distribution detection module, 13, line power detection module, 14, liquid crystal display, 15, key, 16, indicator light, 17, camera, 18, bluetooth module.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment: a kind of distribution line ice melting system of the present embodiment, including control centre 1 and be mounted on feeder line Ice-melt terminal, ice-melt terminal include controller 2, wireless communication module 3, deicing device 4, environment monitoring device 5 and route prison Device 6 is surveyed, environment monitoring device 5 includes Temperature Humidity Sensor 7, air velocity transducer 8 and ice covering thickness detection module 9, route prison Surveying device 6 includes line temperature detection module 10, line current detection module 11, line voltage distribution detection module 12 and line power Detection module 13, controller 2 respectively with wireless communication module 3, deicing device 4, Temperature Humidity Sensor 7, air velocity transducer 8, cover Ice thickness detection module 9, line temperature detection module 10, line current detection module 11, line voltage distribution detection module 12 and line Road power detection module 13 is electrically connected, and wireless communication module 3 can be wirelessly communicated with control centre 1.
Module and control centre wirelessly communicate ice-melt terminal by wireless communication, and environment monitoring device and path monitoring are filled It sets collected data and uploads to control centre.
Ice covering thickness detection module detects route ice covering thickness, and Temperature Humidity Sensor detects ambient temperature and humidity, wind speed sensing Device detects ambient wind velocity, and line temperature detection module detects line temperature, and line current detection module detects line current, route Voltage detection module detects line voltage distribution, and line power detection module detects active power, reactive power, power factor.
Controller acquires data by environment monitoring device, pressure line monitoring device.When transmission line icing thickness is more than setting value When, controller calculates ice melting current according to detection data, and control deicing device exports corresponding electric current ice-melt.
Ice-melt terminal further includes liquid crystal display 14 and key 15, controller 2 respectively with liquid crystal display 14 and key 15 Electrical connection.Liquid crystal display and key are as human-computer interaction interface.
Ice-melt terminal further includes several indicator lights 16, and controller 2 is electrically connected with indicator light 16.
Environment monitoring device 5 further includes camera 17, and camera 17 is electrically connected with controller 2.Camera acquires surrounding ring Border image data and transmission line icing image data.
Ice-melt terminal further includes bluetooth module 18, and bluetooth module 18 is electrically connected with controller 2.Staff can pass through intelligence Mobile phone and its work of ice-melt terminal communication control, without passing through button operation.
Controller acquires data by environment monitoring device, pressure line monitoring device, and it is bent to calculate ice melting current-time relationship Line, control deicing device export corresponding electric current ice-melt, ice melting current-time curve feature expression are as follows:
Wherein,
Ir--- ice melting current;
R0--- conductor resistance at 0 DEG C;
Tr--- the ice-melt time;
The difference of Δ t --- conductor temperature and outside air temperature;
g0--- the specific gravity (generally taking 0.9 by glaze) of ice;
B --- ice layer thickness;
D --- the outer diameter after conductor icing;
RT0--- equivalent ice sheet thermal-conduction resistance;
D --- diameter of wire;
Ln--- conductor length;
λ --- thermal coefficient, to glaze λ=2.27 × 10-2, to freezing fog λ=0.12 × 10-2
RT--- convection current and radiological equivalent thermal resistance, to freezing fogTo glazeWherein V is wind speed;
According to above-mentioned formula, in the situation known to extraneous meteorological condition (wind speed, temperature) and ice covering thickness, can obtain Relation curve the time required to ice melting current size and ice-melt can use this formula when carrying out ice-melt operation, by rising Beginning ice melting current calculates the basic ice-melt time.
The deicing device reconnaissance method of a kind of distribution line ice melting system of the present embodiment, for a kind of above-mentioned distribution wire Road ice melting system, comprising the following steps:
S1: carrying out Load flow calculation, and the voltage and current of the route of different location is analyzed according to calculation of tidal current;
S2: the actual environment data, reactive factor and active power factor of various regions are acquired, finds out and meets deicing device The place of fixed condition;
The deicing device fixed condition are as follows: the first and last section voltage of route is no more than 10.7V and deicing device and main feed The distance of line head end is less than setting value LnAnd line current meet the affiliated wire type of route under environment temperature ice melting current value, Protect line current value;
S3: after choosing deicing device dispensing place, the situation under simulated scenario is simulated, verifies whether this reconnaissance closes It is suitable.
L is calculated according to ice melting current-time curve feature expressionn, ice melting current-time curve feature Expression formula is as follows:
Wherein,
Ir--- ice melting current;
R0--- conductor resistance at 0 DEG C;
Tx --- the ice-melt time;
The difference of Δ t --- conductor temperature and outside air temperature;
g0--- the specific gravity (generally taking 0.9 by glaze) of ice;
B --- ice layer thickness;
D --- the outer diameter after conductor icing;
RT0--- equivalent ice sheet thermal-conduction resistance;
D --- diameter of wire;
Ln--- conductor length;
λ --- thermal coefficient, to glaze λ=2.27 × 10-2, to freezing fog λ=0.12 × 10-2
RT--- convection current and radiological equivalent thermal resistance, to freezing fogTo glazeWherein V is wind speed;
LnThere is certain requirement to ice melting current is reached for conductor length, therefore when selecting deicing device infield, it needs To consider the head end distance of deicing device and main feeder.

Claims (8)

1. a kind of distribution line ice melting system, which is characterized in that including ice-melt control centre (1) and be mounted on feeder line Terminal, the ice-melt terminal include controller (2), wireless communication module (3), deicing device (4), environment monitoring device (5) and Pressure line monitoring device (6), the environment monitoring device (5) include that Temperature Humidity Sensor (7), air velocity transducer (8) and icing are thick It spends detection module (9), the pressure line monitoring device (6) includes line temperature detection module (10), line current detection module (11), line voltage distribution detection module (12) and line power detection module (13), the controller (2) respectively with radio communication mold Block (3), deicing device (4), Temperature Humidity Sensor (7), air velocity transducer (8), ice covering thickness detection module (9), line temperature Detection module (10), line current detection module (11), line voltage distribution detection module (12) and line power detection module are electrically connected It connects (13), wireless communication module (3) can be wirelessly communicated with control centre (1).
2. a kind of distribution line ice melting system according to claim 1, which is characterized in that the ice-melt terminal further includes liquid Crystal display (14) and key (15), the controller (2) are electrically connected with liquid crystal display (14) and key (15) respectively.
3. a kind of distribution line ice melting system according to claim 1, which is characterized in that if the ice-melt terminal further includes Dry indicator light (16), the controller (2) are electrically connected with indicator light (16).
4. a kind of distribution line ice melting system according to claim 1 or 2 or 3, which is characterized in that the environmental monitoring dress Setting (5) further includes camera (17), and the camera (17) is electrically connected with controller (2).
5. a kind of distribution line ice melting system according to claim 1 or 2 or 3, which is characterized in that the ice-melt terminal is also Including bluetooth module (18), the bluetooth module (18) is electrically connected with controller (2).
6. a kind of distribution line ice melting system according to claim 1 or 2 or 3, which is characterized in that controller passes through environment Monitoring device, pressure line monitoring device acquire data, calculate ice melting current-time curve, control deicing device output phase The electric current ice-melt answered, ice melting current-time curve feature expression are as follows:
Wherein,IrFor ice melting current, R0Conductor resistance when being 0 DEG C, TrFor the ice-melt time, Δ t is conductor temperature And the difference of outside air temperature, g0For the specific gravity of ice, b is ice layer thickness, and D is the outer diameter after conductor icing, RT0For the conduction of equivalent ice sheet Thermal resistance, d are diameter of wire, LnFor conductor length, λ is thermal coefficient, RTFor convection current and radiological equivalent thermal resistance.
7. a kind of deicing device reconnaissance method of distribution line ice melting system is used for a kind of distribution line described in claim 1 Ice melting system, which comprises the following steps:
S1: carrying out Load flow calculation, and the voltage and current of the route of different location is analyzed according to calculation of tidal current;
S2: acquiring the actual environment data, reactive factor and active power factor of various regions, finds out and meets deicing device dispensing The place of condition;
The deicing device fixed condition are as follows: the first and last section voltage of route is no more than 10.7V and deicing device and main feeder are first The distance at end is less than setting value LnAnd line current meets the ice melting current value of the affiliated wire type of route under environment temperature, protects line Current value;
S3: after choosing deicing device dispensing place, the situation under simulated scenario is simulated, whether suitable verifies this reconnaissance.
8. a kind of deicing device reconnaissance method of distribution line ice melting system according to claim 7, which is characterized in that root L is calculated according to ice melting current-time curve feature expressionn, ice melting current-time curve feature expression is such as Under:
Wherein,IrFor ice melting current, R0Conductor resistance when being 0 DEG C, TrFor the ice-melt time, Δ t is conductor temperature And the difference of outside air temperature, g0For the specific gravity of ice, b is ice layer thickness, and D is the outer diameter after conductor icing, RT0For the conduction of equivalent ice sheet Thermal resistance, d are diameter of wire, LnFor conductor length, λ is thermal coefficient, RTFor convection current and radiological equivalent thermal resistance.
CN201810249477.1A 2018-03-23 2018-03-23 A kind of distribution line ice melting system and deicing device reconnaissance method Pending CN109449853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810249477.1A CN109449853A (en) 2018-03-23 2018-03-23 A kind of distribution line ice melting system and deicing device reconnaissance method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810249477.1A CN109449853A (en) 2018-03-23 2018-03-23 A kind of distribution line ice melting system and deicing device reconnaissance method

Publications (1)

Publication Number Publication Date
CN109449853A true CN109449853A (en) 2019-03-08

Family

ID=65530031

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810249477.1A Pending CN109449853A (en) 2018-03-23 2018-03-23 A kind of distribution line ice melting system and deicing device reconnaissance method

Country Status (1)

Country Link
CN (1) CN109449853A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111009869A (en) * 2019-11-25 2020-04-14 国网湖南省电力有限公司 Real-time online ice melting equipment for transmission conductor and control method thereof
CN111799738A (en) * 2020-08-07 2020-10-20 国网湖南省电力有限公司 Electrified automatic ice melting system and method for overhead cable of power distribution network

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101752817A (en) * 2009-10-21 2010-06-23 湖南省电力公司调度通信局 Ice-over resistant on-line decision method of transmission line load circuits
CN102721373A (en) * 2012-06-26 2012-10-10 西安金源电气股份有限公司 Online electrified railway overhead contact line icing monitoring system
CN103247991A (en) * 2013-04-22 2013-08-14 铁道第三勘察设计院集团有限公司 Method for achieving ice prevention and thawing of electrified railway catenary by utilizing interphase short circuit
CN104332927A (en) * 2014-11-20 2015-02-04 国家电网公司 Ice melting power triangle based ice coating lead ice melting current obtaining method
CN104834238A (en) * 2015-04-20 2015-08-12 国家电网公司 Control device for use in extra high voltage line ice melting
CN106099751A (en) * 2016-07-07 2016-11-09 周丽玲 A kind of transmission line de-icing method based on action of gravity computation model

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101752817A (en) * 2009-10-21 2010-06-23 湖南省电力公司调度通信局 Ice-over resistant on-line decision method of transmission line load circuits
CN102721373A (en) * 2012-06-26 2012-10-10 西安金源电气股份有限公司 Online electrified railway overhead contact line icing monitoring system
CN103247991A (en) * 2013-04-22 2013-08-14 铁道第三勘察设计院集团有限公司 Method for achieving ice prevention and thawing of electrified railway catenary by utilizing interphase short circuit
CN104332927A (en) * 2014-11-20 2015-02-04 国家电网公司 Ice melting power triangle based ice coating lead ice melting current obtaining method
CN104834238A (en) * 2015-04-20 2015-08-12 国家电网公司 Control device for use in extra high voltage line ice melting
CN106099751A (en) * 2016-07-07 2016-11-09 周丽玲 A kind of transmission line de-icing method based on action of gravity computation model

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
刘剑琦: "直流融冰装置布点研究", 《中国电业 技术》 *
刘泽洪: "《直流输电线路覆冰与防治》", 31 March 2012, 中国电力出版社 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111009869A (en) * 2019-11-25 2020-04-14 国网湖南省电力有限公司 Real-time online ice melting equipment for transmission conductor and control method thereof
CN111799738A (en) * 2020-08-07 2020-10-20 国网湖南省电力有限公司 Electrified automatic ice melting system and method for overhead cable of power distribution network

Similar Documents

Publication Publication Date Title
CN109449853A (en) A kind of distribution line ice melting system and deicing device reconnaissance method
CN204085570U (en) A kind of icing monitoring scavenge unit being applied to transmission line of electricity
CN103972820B (en) Segmented deicing device for power transmission line
CN203787916U (en) High-voltage power transmission line operation state automatic monitoring ice-melting device
CN202305052U (en) On-line temperature monitoring device of transmission line
CN102589618A (en) Intelligent method for monitoring icing status of power grid transmission line
CN102638021B (en) Power line deicer through gravity impact and application of power line deicer
CN104636601B (en) A kind of electric power line ice-covering thickness forecasting procedure for introducing dynamic deicing processes
CN203839837U (en) Subsection de-icing device for power transmission line
Huang et al. An on-line monitoring system of transmission line conductor de-icing
CN205785151U (en) Device for monitoring icing
CN202748054U (en) Power line ice coating on-line monitoring system
CN210536351U (en) Panoramic three-dimensional multifunctional intelligent sensing device based on overhead line
CN204168004U (en) A kind of power grid security risk monitoring and control system
CN106645276B (en) A kind of measurement method of ice coating wire icicle surface Local Condensing Heat Transfer Coefficients
CN108808499B (en) A kind of power distribution cabinet of pre- waterproof bubble
CN101281046B (en) Atmospheric structure ice covering parameter measurement method and multi-conductor ice accumulation device
CN109449852B (en) Distribution line ice melting method in non-power-loss mode
CN102297095A (en) Device for heating weather masts in wind turbine
CN201702138U (en) High voltage insulator ice removal machine
CN204228191U (en) A kind of transmission line of electricity freezing sensor
CN103956701A (en) Multifunctional charged intelligent ice melting system
CN202059137U (en) Passive lightning conductor ice melting controller
CN204131091U (en) A kind of intelligent transformer control device
CN206593997U (en) A kind of power communication monitoring system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190308

RJ01 Rejection of invention patent application after publication