GB/T 25095-2020 PDF English
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GB/T 25095-2020: Monitoring system of operating status for overhead transmission lines---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25095-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.240.20
K 40
Replacing GB/T 25095-2010
Monitoring system of operating status for overhead
transmission lines
Issued on: DECEMBER 14, 2020
Implemented on: JULY 01, 2021
Issued by. Status Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 System composition and classification... 7
5 Technical requirements... 8
6 Test methods... 12
7 Inspection rules... 15
8 Marks, packaging, transportation, custody and storage... 16
Annex A (informative) Installation site selection... 19
Annex B (informative) Installation and maintenance instructions... 23
Monitoring system of operating status for overhead
transmission lines
1 Scope
This Standard specifies the composition and classification, technical requirements, test
methods, inspection rules, product marking, packaging, transportation, custody and
storage for monitoring system of operating status for overhead transmission lines.
This Standard applies to AC and DC monitoring systems of operating status for
overhead transmission lines.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 191, Packaging and storage marks
GB/T 2900.51, Electrotechnical terminology -- Overhead line
GB/T 6388, Transport package shipping mark
GB/T 9969, General principles for preparation of instructions for use of industrial
products
GB/T 22239, Information security technology -- Baseline for classified protection of
cybersecurity
GB/T 22240, Information security technology -- Classification guide for classified
protection of cybersecurity
GB/T 35697-2017, General technical specification for on-line monitoring device on
overhead transmission lines
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 2900.51
as well as the followings apply.
3.1 operating status of transmission lines
The condition of the equipment during the operation of the transmission line, the
condition of the channel environment, and the influence of the surrounding
environment.
3.2 monitoring system of operating status for transmission lines
A general term for a software and hardware system used to perform on-site
measurement, information transmission, storage, processing and analysis of various
types of information such as the status of the transmission line itself and the channel
environment.
NOTE. It consists of a master station system of status monitoring, a status monitoring device and a
communication network of status monitoring.
3.3 master station system of status monitoring
A computer system that can access various monitoring information such as the status
of the transmission line itself and the channel environment, and perform centralized
storage, unified processing, analysis, display and application of data.
3.4 status monitoring device
A measuring device that collects real-time field status information such as the status of
the transmission line itself and the channel environment, and transmits the field
information to the main station system through the communication network.
NOTE. It consists of a data acquisition unit, a data monitoring terminal and a power unit.
3.4.1 data acquisition unit
A measuring device that collects real-time field status information such as the status of
the transmission line itself and the channel environment, and transmits the field
information to the main station system through the communication network.
NOTE. It consists of a data acquisition unit, a data monitoring terminal and a power unit.
3.4.2 data monitoring terminal
A device that collects information from various data acquisition units, stores and
processes it on-site, and can also exchange information with the main station system.
3.4.3 power unit
A device that provides power to the transmission line status monitoring device and has
management functions such as power status monitoring, load classification
management, and safety protection.
4.1.3 The communication network generally consists of wireless communication or
wired communication. It is used for network exchange of data information between the
monitoring device and the main station system.
4.1.4 The monitoring device generally consists of a data acquisition unit, a data
monitoring terminal and a power unit. Data acquisition units are generally divided into
wireless data acquisition units and wired data acquisition units. Data monitoring
terminals generally include a main control and processing unit, a field communication
unit, a remote communication unit, etc. Power units generally include an energy
collection unit, a battery, and a controller, etc.
4.2 System classification
4.2.1 According to the monitoring object, the monitoring system of operating status for
transmission lines is divided into two types. line body status monitoring system and
channel environment status monitoring system.
4.2.2 The line status monitoring system is used to monitor the operating status of the
foundation, tower, ground wire, insulator, hardware, grounding device and auxiliary
facilities of the transmission line. According to the functional use, it is divided into.
ground wire icing monitoring, ground wire breeze vibration monitoring, conductor
dancing monitoring, conductor temperature monitoring, conductor sag monitoring,
wind deviation monitoring, on-site pollution monitoring, fault location monitoring,
tower tilt monitoring, etc.
4.2.3 The channel environment status monitoring system is used to monitor the
meteorological environment and channel conditions of the power transmission channel.
According to the functional use, it is divided into. meteorological monitoring,
image/video monitoring, wildfire monitoring, external force damage monitoring,
geological disaster monitoring, etc.
5 Technical requirements
5.1 Master station system
5.1.1 Functional requirements
5.1.1.1 Data reception
The data receiving function of the master station system shall include.
a) It shall be able to reliably receive and store the line body and channel environment
status monitoring data (including images/videos) sent by the monitoring device;
b) It shall be able to reliably receive and store the operating status information of the
monitoring device sent by the monitoring device (including the operating status
of each component unit such as the data acquisition unit, data monitoring terminal,
power unit and host). If wireless communication is used, it shall also be able to
collect the communication signal strength of the location of the monitoring device;
c) It shall be able to adjust the operating parameters of the master station system
(such as the data collection cycle, sleep cycle, status warning value, etc. of the
monitoring device) according to the changing characteristics of the collected
parameters;
d) When problems such as main station system failure, monitoring device offline
failure, communication network failure, etc. occur, after the failure is eliminated,
the data during the interruption period shall be able to be re-recorded by calling
for retransmission and other methods.
5.1.1.2 Status analysis
The status analysis function of the master station system shall include.
a) Be able to update and maintain the basic parameter information of the line where
the monitoring device is installed, as well as match the calculation model
parameters such as line icing, sag, wind deviation, and galloping;
b) Based on the on-site monitoring data and line parameter information, it has the
function of analyzing the line operation status, and visually displays the line
operation status through wiring diagrams, maps, charts, etc. It has the function of
analyzing the historical changes of line status, and displays the changes of line
status through trend curves, charts, etc.;
c) It has the function of visually displaying various monitoring data and data
processing results. It can display monitoring data through charts, data details and
other methods.
5.1.1.3 Alarm analysis
The alarm analysis function of the master station system shall include.
a) It has the functions of collecting, processing and publishing alarm information of
the operating status of transmission lines. It can warn of abnormal status and
hidden danger risks of the line body and channel environment;
b) It has the function of reporting alarm information and its processing status;
c) It has the function of querying alarm parameter settings.
5.1.1.4 Fault diagnosis
The fault diagnosis function of the master station system shall include.
The storage capacity of the master station system shall meet the storage and
preservation requirements of monitoring data for nearly 5 years and have an automatic
data backup function.
5.1.2.2 Reliability
The main station system can operate normally for no less than 72 h continuously,
provided that the server, operating system, database and other hardware and software
configurations meet the requirements.
5.1.2.3 Security
The security of the master station system shall include.
a) The master station system shall comply with the requirements of information
system security GB/T 22239 and GB/T 22240;
b) The master station system shall not affect the security of the power system during
operation. It shall not cause power grid safety accidents due to system failures or
errors;
c) The authorized users operate the data within their authority, and the system data
design is safe and reliable.
5.2 Monitoring device
5.2.1 The appearance and structure, protection level, accuracy, function test, power
supply performance, environmental adaptability, electromagnetic compatibility,
electrical performance, mechanical performance and reliability of the monitoring
device shall comply with the requirements of GB/T 35697.
5.2.2 For the selection of the installation site for the monitoring device, please refer to
Annex A. For installation and maintenance instructions, please refer to Annex B.
5.3 Communication network
5.3.1 Network structure
The network structure of the condition monitoring system shall adopt multi-layer
distributed structure. It can support Browser/Server structure (referred to as "B/S") and
Client/Server structure (referred to as "C/S"). It can run normally in operating systems
with higher security such as LINUX.
5.3.2 Communication method
5.3.2.1 The condition monitoring system may adopt wired and wireless communication
methods.
5.3.2.2 The main wireless communication methods that can be used are. Access Point
Name (APN)-based dedicated network, power wireless dedicated network, satellite
communication, etc.
5.3.2.3 The main wired communication methods that can be used are. power fiber optic
private network, operator fiber optic private network, etc.
5.3.3 Secure access
When the monitoring device is connected to the main station system by wireless or
wired communication, information security measures shall be taken. Data interaction
and normal data communication with the main station system can be carried out. The
security access meets the requirements of GB/T 22239 and GB/T 22240.
5.3.4 Communication protocol
The application layer data transmission protocol between the master station system and
the monitoring device shall meet the requirements of GB/T 35697.
6 Test methods
6.1 Master station system test method
6.1.1 Functional test
6.1.1.1 Data reception test
Turn on the master station system. Connect the monitoring device and run it normally.
Perform the test as follows.
a) Check whether the received device monitoring data and device operation status
information are normal through the master station system;
b) Manually modify the system operating parameters in the master station system,
such as the data collection cycle and sleep cycle of the monitoring device, and
check whether the collected data interval and sleep cycle are the new setting
values;
c) After shutting down the main station system for a period of time, resume the
system and check whether the data missed during the interruption period has been
recorded.
6.1.1.2 Status analysis test
Turn on the master station system. Connect the monitoring device and run it normally.
Perform the test as follows.
a) Manually modify the basic parameter information of the monitoring device
device is connected to the main station system and operates normally, check the system
operation log, fault log, and data interface log through the monitoring main station.
6.1.2 Performance test
6.1.2.1 Storage performance test
This test is carried out simultaneously with the test in 6.1.1.1.After the monitoring
device is connected to the main station system and operates normally, check whether it
can receive data and complete data storage through the main station system.
Confirm the number of monitoring devices to be connected to the master station system.
Estimate the maximum monitoring data capacity of each monitoring device received by
the master station system each year. Based on this, determine the storage capacity
required for the master station system to operate for 5 years. Check that the actual
storage capacity of the main and auxiliary storage of the master station system shall be
more than twice the storage capacity required in the past 5 years.
6.1.2.2 Reliability test
Turn on the master station system and run it continuously for 72 h. Check whether all
functions of the master station system are normal.
6.1.2.3 Safety test
Check whether the main station system has a security level protection assessment and
security protection evaluation report issued by a third-party assessment agency with
information system level protection assessment qualifications.
6.2 Test method for monitoring device
The test shall be carried out in accordance with GB/T 35697.
6.3 Test methods for communication networks
6.3.1 Network structure test
Choose to test the main site system and database under B/S or C/S structure to verify
the network structure.
6.3.2 Data communication test
Turn on the master station system. After the monitoring device is connected and running
normally, carry out data communication test between the master station system and the
monitoring device in wireless communication mode or wired communication mode.
Check whether the data communication network is unobstructed and the data
communication method used.
6.3.3 Security access test
Turn on the master station system. Connect the monitoring device to the master station
system by wireless communication or wired communication. After the monitoring
device is turned on and operates normally, check the information security measures
taken. Check whether the monitoring device and the master station system can
exchange data normally, whether the data communication is normal, and whether the
information security meets the requirements.
6.3.4 Communication protocol test
The test shall be carried out in accordance with GB/T 35697.
7 Inspection rules
7.1 Type test
Type test is to test the whole set of transmission line condition monitoring system
products item by item, including the main station system, monitoring device and
communication network. Type test shall be carried out in any of the following situations.
a) Before a new product is finalized;
b) During normal production, once every 4 years;
c) Before the product is transferred to another factory for finalization and appraisal;
d) After the formal production, when there are major changes in structure, materials,
processes, etc. that may affect product performance;
e) When production is resumed after being suspended for one year or more;
f) When the national technical supervision agency or the technical inspection
department entrusted by it puts forward a type inspection requirement;
g) When there is a significant difference between the factory inspection results and
the inspection results of the previous batch of products;
h) When stipulated in the contract.
The type test is to be carried out according to the test items specified in Table 1.
7.2 Exit-factory Test
The exit-factory test items are shown in Table 1.The manufacturer can add test items
according to user requirements and after negotiation between the two parties.
7.3 Sampling test
The sampling test is carried out according to the following sampling plan and judgment
a) Model and specifications;
b) Manufacturer name, trademark, place of origin;
c) Exit-factory number;
d) Date of manufacture, etc.
8.1.2 Packaging marks
A prominent and firm packaging mark shall be placed at an appropriate location on the
packaging box. The contents include.
a) Name and address of manufacturer;
b) Name and model of product;
c) Number of equipment;
d) Dimensions of packaging box (mm);
e) Net weight or gross weight (kg);
f) Transportation operation safety sign;
g) Destination station (port) and consignee;
h) Departure station (port) and consignee.
8.1.3 Storage and transportation diagrams and delivery and receipt marks
Packaging, storage and transportation diagrams and shipping and receiving marks shall
be selected based on the characteristics of the packaged products and in accordance
with the relevant provisions of GB/T 191 and GB/T 6388.
8.2 Packaging
The power transmission line status monitoring system products shall be well packaged,
reasonably structured, compact, and reliably protected during transportation. The
packaging environment and packaging box shall be clean, dry, free of harmful gases
and foreign matter.
8.3 Technical documents provided with the product
The documents provided with the product shall contain the following contents and
comply with the requirements of GB/T 9969.
a) Packing list;
b) Installation and operation manual (one copy for each set of products);
Annex A
(informative)
Installation site selection
A.1 Typical monitoring devices of line condition monitoring system
A.1.1 Ground wire ice monitoring device
The ground wire ice monitoring device shall be installed in the following locations.
a) Windward slopes, passes, wind tunnels, large water surfaces and other areas prone
to ice;
b) The angle between the transmission line and the dominant wind direction in winter
is greater than 45°;
c) Areas with heavy snow all year round;
d) Areas with heavy wind outlets for high-voltage transmission lines;
e) Ice zone demarcation points, sections with historical ice damage, and sections that
are difficult for personnel to reach in medium and heavy ice areas.
A.1.2 Breeze vibration monitoring device for ground conductor
The breeze vibration monitoring device shall be installed in the following locations.
a) Important crossing sections (large crossing sections such as rivers, lakes, and
straits);
b) Important transmission lines prone to vibration;
c) Sections where large vibrations can be observed or where strands have been
broken due to vibration.
A.1.3 Conductor dancing monitoring device
The galloping monitoring device shall be installed in the following locations.
a) Important crossing sections in galloping-prone areas (such as the Yangtze River
and the Yellow River);
b) Transmission lines in micro-topography and micro-meteorological areas where
galloping is likely to occur;
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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