CN202886446U - Monitoring system for grounding current of high-voltage cable sheath - Google Patents
Monitoring system for grounding current of high-voltage cable sheath Download PDFInfo
- Publication number
- CN202886446U CN202886446U CN 201220336320 CN201220336320U CN202886446U CN 202886446 U CN202886446 U CN 202886446U CN 201220336320 CN201220336320 CN 201220336320 CN 201220336320 U CN201220336320 U CN 201220336320U CN 202886446 U CN202886446 U CN 202886446U
- Authority
- CN
- China
- Prior art keywords
- cable
- monitoring system
- current
- grounding current
- grounding
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model discloses a monitoring system for grounding current of a high-voltage cable sheath. The monitoring system for grounding current of the high-voltage cable sheath is composed of at least three cable current collecting modules and one or more grounding current collecting terminals. The cable current collecting modules are installed on cross interconnection points in a cross interconnection tank. The grounding current collecting terminals are connected together in a wired manner. The cable current collecting modules realize the networking by adopting a GPRS method and are connected with a distribution network control center through a GPRSDTU communication protocol. The monitoring system for grounding current of the high-voltage cable sheath is based on a grounding current circulation collecting principle and is used for detecting power cable points and transmitting alert data. The monitoring system for grounding current of the high-voltage cable sheath can realize real-time monitoring of the cross interconnection grounding points of a power cable under the premise of not affecting safe operation state of the cable and can realize early detection and diagnosis for hot spots causing accidents.
Description
Technical field
The utility model relates to the cable grounding current flow devices fields such as power industry, power supply, more particularly, relates to a kind of system that is configured and monitors by GPRS DTU data transmission based on ground current circulation acquisition module.
Background technology
Along with the development in city, the quantity that 110 kV and above single core high voltage power cable are used sharply increases, and the cable load increases day by day, and the cable metal sheath ground current problem that the operation of a large amount of single core cables brings more and more receives people's concern.
At present, stipulate according to GB 50217 " Code for design of cables of electric works ": the normal induction electromotive force maximal value at any point non_direct ground place should satisfy following regulation on the metal level of interchange single-core power cables: when not taking effectively to prevent the safety practice of any contact metal layer of personnel, and must not be greater than 50 V; Except above-mentioned situation, must not be greater than 300 V
[3]High-tension cable is because its structure adopts single cored structure, and this must cause and occur induced voltage on the protective metal shell according to the electromagnetics principle.Therefore have inevitably induced voltage on the high-voltage cable metal sheath.According to the statistics of the live testing of Beijing 110 kV cable cover(ing)s, the induced voltage of cable cover(ing) generally all below 20 V, is lower than the codes and standards of 50 V.
In order to reduce the induced voltage on the cable cover(ing), making it can be not excessive, will be with cable cover(ing) segmentation ground connection, with the size of restriction induced voltage in the engineering.But, if earthing mode is improper, this induced voltage can form very large ground current at protective metal shell, this will bring two large main harm to cable transmission line: the first reduces the ability (about about 1/3rd) of cable transfer electric power greatly, it two is to cause that protective metal shell heating reduces major insulation, shortens the normal operation life of cable.Therefore, high-voltage cable metal sheath must adopt correct earthing mode, guarantees circulation is reduced to minimum, satisfies normal service requirement.If the bad connection of cable terminal and intermediate head sheath and earthing cable also will cause the local pyrexia of junction, cause cable fault.For this reason, set up power cable ground current Evaluation Strategy and fault diagnosis mechanism is very important.
The utility model content
Technical problem to be solved in the utility model is, overcomes the deficiencies in the prior art, and a kind of high-tension cable sheath grounding current monitoring system is provided.
The utility model high-tension cable sheath grounding current monitoring system, be achieved by following technical proposals, described ground current monitoring system is comprised of three cable current acquisition modules and a ground current acquisition terminal at least, each cable current acquisition module is installed on each interior cross interconnected point of cross interconnected case, each ground current acquisition terminal passes through wired connection, described cable current acquisition module adopts the mode of GPRS to carry out networking, is connected with distribution control center by GPRS DTU communication protocol.
The cable current acquisition module is current transformer, and the current transformer specification is 50A:1A.
The utility model is based on ground current circulation acquisition principle, being used for the power cable point detects, and to the high-tension cable sheath grounding current monitoring system the transmission of data of early warning, the Real-Time Monitoring of realizing under the cable running safety state the cross interconnected earth point of power cable can not affected, can carry out early detection and diagnosis to the heat spot that causes accident, in time find accidents caused potential cause and take the corresponding management measure, Effective Raise power supply continuity and reliability have great safe meaning and economic worth to operation of power networks.
The utility model high-tension cable sheath grounding current monitoring system is carried out early detection and diagnosis to the heat spot that causes accident, in time finds accidents caused potential cause and takes the corresponding management measure, the Effective Raise power supply continuity.Reduced the maintenance cost that manpower is patrolled and examined.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, described ground current monitoring system is comprised of three cable current acquisition modules (CT) and a ground current acquisition terminal at least, each cable current acquisition module is installed on each interior cross interconnected point of cross interconnected case, each ground current acquisition terminal passes through wired connection, described cable current acquisition module adopts the mode of GPRS to carry out networking, is connected with distribution control center by GPRS DTU communication protocol.The cable current acquisition module is current transformer, and the current transformer specification is 50A:1A.Power acquisition is its power supply with the solar-electricity magnetic sheet.Solid line is wired transmission data among the figure, and dotted line is the wireless transmission data.The utility model is that data are sent on the computer of fixed ip address with wireless form.
For power circuit, cross interconnected earth point may reach up to a hundred.Adopt the mode of GPRS to carry out networking, be equivalent to Receiving Host and manage all up to a hundred communication nodes, need the process of a communication synchronization, avoid the conflict of radio communication.Specifically arrange as follows: each cable current acquisition module addresses by ascending order according to the difference of position; The functions of modules of dispatching from the factory is set to switch in per 30 minutes 3 seconds of receiving mode; Each module will be in receiving mode under receiving mode as after receiving the instruction of Receiving Host transmission always.After the main frame scanning one time, all modules all are in the command reception state; Main frame is pressed the order of submodule address ascending order, sends instruction to each submodule.After receiving instruction, submodule enters the cable current drainage pattern successively.
Embodiment recited above is described the utility model preferred implementation; be not that design of the present utility model and scope are limited; under the prerequisite that does not break away from the utility model design philosophy; common engineering technical personnel make the technical solution of the utility model in this area various distortion and improvement all should belong to protection domain of the present utility model.
Claims (2)
1. high-tension cable sheath grounding current monitoring system, it is characterized in that, described ground current monitoring system is comprised of three cable current acquisition modules and a ground current acquisition terminal at least, each cable current acquisition module is installed on each interior cross interconnected point of cross interconnected case, each ground current acquisition terminal passes through wired connection, described cable current acquisition module adopts the mode of GPRS to carry out networking, is connected with distribution control center by GPRS DTU communication protocol.
2. high-tension cable sheath grounding current monitoring system according to claim 1 is characterized in that, described cable current acquisition module is current transformer, and the current transformer specification is 50A:1A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336320 CN202886446U (en) | 2012-07-12 | 2012-07-12 | Monitoring system for grounding current of high-voltage cable sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336320 CN202886446U (en) | 2012-07-12 | 2012-07-12 | Monitoring system for grounding current of high-voltage cable sheath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886446U true CN202886446U (en) | 2013-04-17 |
Family
ID=48077858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220336320 Expired - Fee Related CN202886446U (en) | 2012-07-12 | 2012-07-12 | Monitoring system for grounding current of high-voltage cable sheath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886446U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149421A (en) * | 2012-09-18 | 2013-06-12 | 天津学子电力设备科技有限公司 | High voltage cable metal sheath grounding current online monitoring system |
| CN103389408A (en) * | 2013-07-16 | 2013-11-13 | 国家电网公司 | High-voltage single-core cable sheath grounding current on-line monitoring device and control method |
| CN103630814A (en) * | 2013-12-11 | 2014-03-12 | 国家电网公司 | Insulating dielectric loss angle tendency online monitoring method of high-voltage cables under cross interconnection |
| CN104062483A (en) * | 2014-07-01 | 2014-09-24 | 杭州意能防雷技术有限公司 | Distributed high voltage cable shielding layer current monitoring system and distributed high voltage cable shielding layer current monitoring method thereof |
| CN107728001A (en) * | 2017-08-21 | 2018-02-23 | 国网北京市电力公司 | Three-phase cross cable current fault detection device |
| CN108646143A (en) * | 2018-07-12 | 2018-10-12 | 广东电网有限责任公司东莞供电局 | Single-core power cable fault detection structure based on circulation measurement and fault detection method thereof |
-
2012
- 2012-07-12 CN CN 201220336320 patent/CN202886446U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149421A (en) * | 2012-09-18 | 2013-06-12 | 天津学子电力设备科技有限公司 | High voltage cable metal sheath grounding current online monitoring system |
| CN103389408A (en) * | 2013-07-16 | 2013-11-13 | 国家电网公司 | High-voltage single-core cable sheath grounding current on-line monitoring device and control method |
| CN103630814A (en) * | 2013-12-11 | 2014-03-12 | 国家电网公司 | Insulating dielectric loss angle tendency online monitoring method of high-voltage cables under cross interconnection |
| CN104062483A (en) * | 2014-07-01 | 2014-09-24 | 杭州意能防雷技术有限公司 | Distributed high voltage cable shielding layer current monitoring system and distributed high voltage cable shielding layer current monitoring method thereof |
| CN107728001A (en) * | 2017-08-21 | 2018-02-23 | 国网北京市电力公司 | Three-phase cross cable current fault detection device |
| CN108646143A (en) * | 2018-07-12 | 2018-10-12 | 广东电网有限责任公司东莞供电局 | Single-core power cable fault detection structure based on circulation measurement and fault detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202886446U (en) | Monitoring system for grounding current of high-voltage cable sheath | |
| US9106108B2 (en) | Smart feed line automation system based on 10KV carrier communication | |
| CN201637791U (en) | Online monitoring system for high-voltage shunt capacitor | |
| CN103149421A (en) | High voltage cable metal sheath grounding current online monitoring system | |
| CN205263186U (en) | Cable circulation on -line monitoring device | |
| CN205539320U (en) | Cable termination arcing ground monitoring devices | |
| CN203551726U (en) | Electric locomotive roof insulation detecting device | |
| CN202094617U (en) | Arc light protection system | |
| CN109149536A (en) | A kind of DC power-supply system Traction networks ground protection mode that positive and negative anodes insulate | |
| CN203811740U (en) | Grounding monitoring device for metal sheathes of 110 kV and more than 110 kV cables | |
| CN108199477B (en) | Remote intelligent monitoring method and equipment for faults of AC/DC system of transformer substation | |
| CN218331807U (en) | Intelligent monitoring system for edge of power transmission line | |
| CN103809060B (en) | Platform district low-voltage zero line current leakage detection system and detection of electrical leakage method | |
| CN202916375U (en) | Data collection terminal and station area low-voltage zero line current leakage detection system using the same | |
| CN202041612U (en) | Automatic locating device for earth faults of electricity transmission lines | |
| CN204807659U (en) | Insulating flashover positioning system of contact net | |
| CN201608563U (en) | Electric arc light intelligent remote monitoring system | |
| CN102508101A (en) | Power cable operation fault monitoring terminal and system for detecting short circuit | |
| CN107069639A (en) | A kind of intelligent cable with video acquisition function | |
| CN209043962U (en) | High-tension cable sheath grounding circulation monitoring device | |
| CN102868223B (en) | Circuit offside information is utilized to improve the anti-method of this side transformer station five | |
| CN203166397U (en) | Circuit structure for eliminating induction voltage | |
| CN207302857U (en) | A kind of intelligent clandestine network distribution transformer | |
| CN111907379A (en) | 10kV/27.5kV electrified railway auxiliary traction power supply | |
| CN204992774U (en) | Well overheated monitoring devices in high tension switchgear current -carrying return circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20170712 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |