CN114167141A - Transmission tower grounding resistance on-line monitoring system based on non-contact measurement method - Google Patents
Transmission tower grounding resistance on-line monitoring system based on non-contact measurement method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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Abstract
The invention provides a transmission tower grounding resistance on-line monitoring system based on a non-contact measurement method, and relates to the technical field of grounding resistance monitoring. The system comprises a monitoring server and a monitoring substation, wherein the monitoring server is connected with the monitoring substation through a communication module; the voltage generator can generate measuring voltage through the voltage converter, the current transformer can measure the measuring current of the tower grounding resistance, the control panel can acquire data information of the tower grounding resistance, and the monitoring unit can store, display, count and analyze data of tower grounding resistance parameters and send alarm information. The control panel, the voltage generator, the voltage converter and the current transformer are arranged in the monitoring substation, so that the ground resistance of the high-voltage transmission tower can be monitored and analyzed in real time, and the on-line detection of the ground resistance plays an important role in stable operation of a regional power grid.
Description
Technical Field
The invention relates to the technical field of grounding resistance monitoring, in particular to a transmission tower grounding resistance on-line monitoring system based on a non-contact measurement method.
Background
When an overhead transmission line is in operation, the proportion of lightning accidents caused by poor grounding of a tower to the fault rate of the line is high, which is mainly caused by lightning striking the top of the tower or a ground wire (lightning conductor), when lightning current leaks into the ground through a tower grounding device, and high counterattack overvoltage is generated due to high grounding resistance. The tower grounding of the transmission line is one of the main measures for line lightning protection, and the reliability of the tower grounding has great significance for ensuring the safe and stable operation of the power system. The tower ground resistance is important data, reduces the transmission line tower ground resistance, can improve the lightning-resistant level of the line, reduces the lightning accidents, reduces the contact voltage and the step voltage near the tower, and prevents people and livestock from electric shock accidents.
The existing measurement method for the ground resistance of the transmission line tower generally adopts a voltmeter method, a ratiometer method and an electric bridge method, the ground resistance is detected once a year on the transmission line, the measurement is mostly offline, and the measurement on the ground resistance can not be carried out anytime and anywhere, so that the online monitoring on the ground resistance of the transmission line tower becomes more important, and an online monitoring system for the ground resistance of the transmission line tower is urgently needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an on-line monitoring system for the grounding resistance of a transmission tower based on a non-contact measurement method, and solves the problem that the grounding resistance of the transmission tower cannot be measured at any time and any place.
In order to achieve the purpose, the invention is realized by the following technical scheme: a transmission tower grounding resistance on-line monitoring system based on a non-contact measurement method comprises a monitoring server and a monitoring substation, wherein the monitoring server is connected with the monitoring substation through a communication module;
the monitoring substation comprises a control panel, a voltage generator, a voltage transformer and a current transformer, wherein the voltage generator is electrically connected with a tower grounding resistance, the voltage generator can generate measuring voltage through the voltage transformer, the current transformer can measure the measuring current of the tower grounding resistance, and the control panel can acquire data information of the tower grounding resistance through the measuring voltage and the measuring current and upload the data information to the monitoring server;
the monitoring server comprises a monitoring unit, the monitoring unit can store, display and analyze data of tower grounding resistance parameters, statistics reports are carried out, and early warning functions of the tower grounding resistance parameters are completed.
Preferably, the communication module adopts one or more of GSM, CDMA, GPRS and 4G network.
Preferably, the monitoring server is a computer deployed in a remote monitoring center, and can operate the monitoring unit to acquire data information of the tower ground resistance.
Preferably, the monitoring unit can automatically dial an alarm call and send alarm information to an attendant through a short message of a mobile phone.
Preferably, the monitoring substation further comprises a solar panel and a storage battery, wherein the solar panel is electrically connected with the storage battery, and the storage battery can be connected with the storage battery.
Preferably, the monitoring server is further configured to connect and display a satellite map.
Preferably, the monitoring unit can work in a B/S mode and a C/S mode simultaneously and can be interconnected with the MIS system.
Preferably, the use method of the transmission tower ground resistance on-line monitoring system based on the non-contact measurement method comprises the following steps:
s1, under the condition that the grounding state of the tower is not changed, the grounding resistance of the tower is measured, a voltage U' generated by a voltage generator is utilized to pass through a voltage converter, a voltage U is generated at the secondary stage of the voltage U to serve as a measurement power supply, meanwhile, the current I flowing through a measured loop is measured through a current transformer, and the loop resistance except the measured grounding resistance is ignored, so that the grounding resistance of the measured tower is Rg-U/I;
s2, the monitoring substation can uninterruptedly acquire the grounding resistance parameter information of the measured tower and periodically send the grounding resistance parameter information of the measured tower to the monitoring server through the communication module;
s3, the monitoring server stores, displays and counts the pole tower grounding resistance parameter information, analyzes the report, automatically compares the received pole tower grounding resistance parameter with a set threshold, if the pole tower grounding resistance parameter exceeds the normal range, pops up alarm information, automatically dials an alarm call, and sends the alarm information to an attendant through a short message of a mobile phone;
s4, the monitoring server has the functions of satellite map connection and display, the geographical position of each tower can be clearly displayed, and an operator on duty can quickly position the tower with abnormal grounding.
The invention provides a transmission tower grounding resistance on-line monitoring system based on a non-contact measurement method. The method has the following beneficial effects:
the system can monitor and analyze the grounding resistance of the high-voltage transmission tower in real time through the control panel, the voltage generator, the voltage converter and the current transformer which are arranged in the monitoring substation, timely sends information to the monitoring server through a GSM/CDMA/GPRS/4G network, further realizes pre-warning/alarming, reminds a line operation responsible person to pay attention to the operation condition of the line and take corresponding handling measures, and can confirm whether the grounding resistance of the tower meets the standard value required by an operation unit at any time and any place through on-line detection of the grounding resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a transmission tower grounding resistance on-line monitoring system based on a non-contact measurement method, which comprises a monitoring server and a monitoring substation, wherein the monitoring server is connected with the monitoring substation through a communication module;
the monitoring substation comprises a control panel, a voltage generator, a voltage transformer and a current transformer, wherein the voltage generator is electrically connected with the tower grounding resistance, the voltage generator can generate measuring voltage through the voltage transformer, the current transformer can measure the measuring current of the tower grounding resistance, and the control panel can acquire data information of the tower grounding resistance through the measuring voltage and the measuring current and upload the data information to a monitoring server;
the monitoring server comprises a monitoring unit, the monitoring unit can store, display, count and analyze the tower grounding resistance parameters to complete the early warning function of the tower grounding resistance parameters, and the monitoring unit can send warning information. The monitoring server can be a server equipped by each provincial company, and can also be a common computer equipped by a user.
The communication module adopts one or more of GSM, CDMA, GPRS and 4G networks, and the monitoring server is a computer deployed in a remote monitoring center and can operate the monitoring unit to acquire data information of the tower grounding resistance. The monitoring unit can dial the warning call automatically, can send the warning message to the personnel on duty through the mobile phone SMS, and the monitoring substation still includes solar panel and battery, and solar panel electric connection battery, battery can with. The solar energy and the storage battery are adopted for power supply, the size is light, and the installation and the maintenance are convenient. The monitoring server is also used for connecting and displaying the satellite map. The monitoring unit can work in a B/S mode and a C/S mode simultaneously and can be interconnected with an MIS system.
The method comprises the steps of utilizing analysis of tower ground resistance and a wireless communication technology to monitor the high-voltage transmission tower ground resistance in real time, sending information to a monitoring server in time through a GSM/CDMA/GPRS/4G network, further realizing pre-warning/alarming, reminding a line operation responsible person to pay attention to the line operation condition and taking corresponding handling measures.
The system can confirm whether the tower grounding resistance meets the standard value required by an operation unit at any time and any place through the online detection of the grounding resistance, is put into use in important high-voltage lines of a heavy thunder area, and has an important effect on the stable operation of a power grid in the area.
Monitoring substation technical parameters: measurement range: 0-100 omega; measurement error: less than or equal to 10 percent; measurement resolution: 0.1 omega; the working environment is as follows: temperature: -40 ℃ to +85 ℃; relative humidity: less than or equal to 100 percent; atmospheric pressure: 550 hPa-1060 hPa; protection grade: IP 65; power consumption: working power consumption: less than or equal to 5W; the standby power consumption is less than or equal to 0.1W; applicable objects are as follows: 10KV-500KV high-voltage transmission line; inputting voltage of 12-24V; service life of the battery: the service life of the battery is more than or equal to 5 years, and the battery can be continuously supplied for more than 30 days without external charging.
The monitoring substation has the following functions: (1) acquiring grounding resistance data through a tower grounding resistance acquisition unit; (2) actively uploading the data of the grounding resistance of the monitoring tower according to a set period; (3) responding to a server instruction in real time, and uploading real-time data and historical data in a certain range; (4) the short message service system has the functions of dormancy and awakening so as to save power and support short messages during dormancy; (5) the power-off data protection function is realized; (6) the device has the functions of fault self-diagnosis and self-recovery; (7) supporting alarm and alarm threshold setting; (8) support for remote reset; (9) supporting networking parameter setting (changing and inquiring server IP, port); (10) support password setting and substation number setting; (11) supporting time correction and time query; (12) and the monitoring function of the power supply voltage of the equipment is supported.
The grounding resistance of the charged high-voltage iron tower can be directly measured without splitting an object to be measured; the communication mode is flexible, and the ZigBee/WIFI/GSM/CDMA/GPRS/4G network is supported; the waterproof coating is an industrial product, adopts a waterproof metal shell and is suitable for various severe weather environments; the system adopts a low-power-consumption design and adopts a dynamic power management strategy to meet the power-saving requirement; the method supports a controlled acquisition mode and an automatic acquisition mode, and can set parameters such as a sampling interval (5 minutes to 24 hours), an alarm threshold value and the like through background software; the grounding condition of the tower can be qualitatively and quantitatively analyzed by being provided with perfect background software, and the system has the functions of data storage, historical data query, report form, printing, graph drawing and the like; the data query and the alarm receiving are supported by adopting a mobile phone; the method meets the national grid company enterprise standard 'Transmission line State monitoring device general technical Specification' (Q/GDW 242-2010).
The monitoring unit can adopt software uniformly developed by a national network or a south network, and can also purchase a high-voltage transmission line online monitoring system program developed by the company, and the main functions of the monitoring unit are as follows: (1) the monitoring data acquisition system has the function of automatically receiving the monitoring data acquired by the monitoring substation in real time and at regular time; (2) the device has the function of remotely setting the data acquisition density; (3) the system has the functions of automatically acquiring time and sending time setting commands to the monitoring substation; (4) the monitoring function of the working state of the terminal equipment is provided; (5) the mobile phone has an alarm prompting function and multiple alarm modes, and alarm information is sent to mobile phones (multiple mobile phones) of related personnel; (6) the alarm prompt information provides the accurate geographic position of the alarm measuring point, the measuring point name and the detailed alarm time, and the position of the measuring point on the plane graph is changed into red; (7) the device management function and the storage service function are provided; (8) the system software platform can work in a B/S mode and a C/S mode simultaneously; (9) multi-mode remote monitoring: remote WEB, client system control; (10) counting, analyzing and outputting monitored data, selecting different measuring points and different time periods according to requirements, and displaying the data in various forms of reports, statistical graphs, curves and the like; (11) a trend graph can be made according to historical data and current data of the trend graph; (12) the function of infinite extension is provided; (13) the monitoring centers of the city bureaus and the provincial company monitoring centers are networked in a wired mode, and the provincial company monitoring centers can directly call data monitored by the city bureaus monitoring centers to know the condition of the grounding resistance of the tower; (14) and an external data interface is provided, and the system can be interconnected with other MIS systems.
Example two:
the embodiment of the invention provides a use method of a transmission tower grounding resistance on-line monitoring system based on a non-contact measurement method, which comprises the following steps:
s1, measuring the tower grounding resistance by adopting a non-contact measuring method under the condition that the tower grounding state is not changed, utilizing the voltage U' generated by a voltage generator to generate a voltage U as a measuring power supply through a voltage converter at the secondary stage, measuring the current I flowing through the measured loop through a current transformer, and neglecting the loop resistance except the measured grounding resistance, wherein the Rg is equal to U/I;
s2, the monitoring substation can uninterruptedly acquire the grounding resistance parameter information of the measured tower and periodically send the grounding resistance parameter information of the measured tower to the monitoring server through the communication module;
s3, the monitoring server stores, displays and counts the pole tower grounding resistance parameter information, analyzes the report, automatically compares the received pole tower grounding resistance parameter with a set threshold, if the pole tower grounding resistance parameter exceeds the normal range, pops up alarm information, automatically dials an alarm call, and sends the alarm information to an attendant through a short message of a mobile phone;
s4, the monitoring server has the functions of satellite map connection and display, the geographical position of each tower can be clearly displayed, and an operator on duty can quickly position the tower with abnormal grounding.
The method of injecting current into a grounding loop through a CT coil (current transformer) is adopted to measure grounding resistance, and belongs to a voltage ammeter method in principle.
By the method, the real-time monitoring of the 220KV power transmission line within 5Km of the 220KV transformer substation can be realized, the working requirement of normal patrol of the grounding resistor is met, the grounding resistor data can be continuously obtained, the data are periodically sent to the monitoring server through the GSM/GPRS/4G communication module, the monitoring server runs the monitoring software, the received data are automatically compared with the set threshold value through a program, if the data exceed the normal range, the alarm information is popped up, an alarm call can be automatically dialed, or the alarm information is sent to an attendant through a short message of a mobile phone, the monitoring software has a GOOGLE satellite map connection and display function, the geographical position of each tower can be clearly displayed, and the attendant can quickly position the abnormally grounded tower.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. Transmission tower ground resistance on-line monitoring system based on non-contact measurement method, its characterized in that: the monitoring system comprises a monitoring server and a monitoring substation, wherein the monitoring server is connected with the monitoring substation through a communication module;
the monitoring substation comprises a control panel, a voltage generator, a voltage transformer and a current transformer, wherein the voltage generator is electrically connected with a tower grounding resistance, the voltage generator can generate measuring voltage through the voltage transformer, the current transformer can measure the measuring current of the tower grounding resistance, and the control panel can acquire data information of the tower grounding resistance through the measuring voltage and the measuring current and upload the data information to the monitoring server;
the monitoring server comprises a monitoring unit, the monitoring unit can store, display and analyze data of tower grounding resistance parameters, statistics reports are carried out, and early warning functions of the tower grounding resistance parameters are completed.
2. The transmission tower ground resistance on-line monitoring system based on the non-contact measurement method according to claim 1, characterized in that: the communication module adopts one or more of GSM, CDMA, GPRS and 4G networks.
3. The transmission tower ground resistance on-line monitoring system based on the non-contact measurement method according to claim 1, characterized in that: the monitoring server is a computer deployed in a remote monitoring center, and can operate the monitoring unit to acquire data information of the tower grounding resistance.
4. The transmission tower ground resistance on-line monitoring system based on the non-contact measurement method according to claim 1, characterized in that: the monitoring unit can automatically dial an alarm call and send alarm information to an attendant through a mobile phone short message.
5. The transmission tower ground resistance on-line monitoring system based on the non-contact measurement method according to claim 1, characterized in that: the monitoring substation further comprises a solar panel and a storage battery, wherein the solar panel is electrically connected with the storage battery, and the storage battery can be connected with the storage battery.
6. The transmission tower ground resistance on-line monitoring system based on the non-contact measurement method according to claim 1, characterized in that: the monitoring server is also used for connecting and displaying the satellite map.
7. The transmission tower ground resistance on-line monitoring system based on the non-contact measurement method according to claim 1, characterized in that: the monitoring unit can work in a B/S mode and a C/S mode at the same time and can be interconnected with an MIS system.
8. The use method of the transmission tower grounding resistance on-line monitoring system based on the non-contact measurement method according to claim 1, is characterized in that: the method comprises the following steps:
s1, under the condition that the grounding state of the tower is not changed, the grounding resistance of the tower is measured, a voltage U' generated by a voltage generator is utilized to pass through a voltage converter, a voltage U is generated at the secondary stage of the voltage U to serve as a measurement power supply, meanwhile, the current I flowing through a measured loop is measured through a current transformer, and the loop resistance except the measured grounding resistance is ignored, so that the grounding resistance of the measured tower is Rg-U/I;
s2, the monitoring substation can uninterruptedly acquire the grounding resistance parameter information of the measured tower and periodically send the grounding resistance parameter information of the measured tower to the monitoring server through the communication module;
s3, the monitoring server stores, displays and counts the pole tower grounding resistance parameter information, analyzes the report, automatically compares the received pole tower grounding resistance parameter with a set threshold, if the pole tower grounding resistance parameter exceeds the normal range, pops up alarm information, automatically dials an alarm call, and sends the alarm information to an attendant through a short message of a mobile phone;
s4, the monitoring server has the functions of satellite map connection and display, the geographical position of each tower can be clearly displayed, and an operator on duty can quickly position the tower with abnormal grounding.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717366A (en) * | 2016-01-29 | 2016-06-29 | 南京尚志电子科技有限公司 | Online grounding resistance monitoring alarm and remote monitoring system |
| CN106526423A (en) * | 2016-11-16 | 2017-03-22 | 中国电力科学研究院 | Method and system for informatization management for transmission line tower grounding resistance data |
| CN107449972A (en) * | 2016-05-31 | 2017-12-08 | 国网冀北电力有限公司张家口供电公司 | A kind of impact grounding resistance measuring instrument |
| CN209471183U (en) * | 2019-01-23 | 2019-10-08 | 中国南方电网有限责任公司超高压输电公司曲靖局 | A kind of highly reliable pole tower ground resistance measuring device |
| CN110514904A (en) * | 2019-09-29 | 2019-11-29 | 国网河南省电力公司濮阳供电公司 | Insulating resistance measuring early warning system |
| CN110726879A (en) * | 2019-10-25 | 2020-01-24 | 长春工程学院 | Power transmission line tower grounding resistance monitoring system based on accurate measurement technology |
-
2021
- 2021-11-24 CN CN202111399565.8A patent/CN114167141A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717366A (en) * | 2016-01-29 | 2016-06-29 | 南京尚志电子科技有限公司 | Online grounding resistance monitoring alarm and remote monitoring system |
| CN107449972A (en) * | 2016-05-31 | 2017-12-08 | 国网冀北电力有限公司张家口供电公司 | A kind of impact grounding resistance measuring instrument |
| CN106526423A (en) * | 2016-11-16 | 2017-03-22 | 中国电力科学研究院 | Method and system for informatization management for transmission line tower grounding resistance data |
| CN209471183U (en) * | 2019-01-23 | 2019-10-08 | 中国南方电网有限责任公司超高压输电公司曲靖局 | A kind of highly reliable pole tower ground resistance measuring device |
| CN110514904A (en) * | 2019-09-29 | 2019-11-29 | 国网河南省电力公司濮阳供电公司 | Insulating resistance measuring early warning system |
| CN110726879A (en) * | 2019-10-25 | 2020-01-24 | 长春工程学院 | Power transmission line tower grounding resistance monitoring system based on accurate measurement technology |
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Application publication date: 20220311 |