Download Product Name: Overhead line Fault indicator

北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
Product Name: Power Distribution Online Monitoring System
Patent Number: 201020046745.9
Product Model: HC-ZXJC
1.Company Introduction
Beijing HCRT Electrical Equipment Co., Ltd, which located in Beijing, China,
specializes in the production, development, introduction and promotion of middle-low
voltage power distribution equipments as well as power distribution online monitoring
system. Our company keeps intensive cooperation with many specialist agencies,
R&D institutions and universities to promote new products and technology of the
distribution as well as innovations in technology of power.
2.Product Description
The power distribution online monitoring system, which is made by our
company, is applied to the overhead power distribution network automatic system
from 6KV to 60KV. It is used to improve the safe and reliable operating performance
through centralized monitoring the current, temperature, earth fault and short-circuit
fault condition on the power distribution circuit.
3.Main Function
The new type fault indicator is used to monitor the line current, temperature and
fault information. And then it sends the information to the DTU on the nearby
transmission pole through wireless communication. After receiving the data, the
GPRS/CDMA data terminal starts to verify and process according to 104
communication protocol, then sends the data to the backstage software through
GPRS/CDMA network. The monitoring part of the backstage software collects the
line information sent by the DTU all over the whole electric network to process, store
and alarm. The backstage software includes the monitoring part and WEB webpage
service part. The monitoring part of the backstage software collects the line
information sent by the DTU. And the WEB webpage service part is for generating
various dynamic monitoring page and graph. The user can check the monitoring
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
information of power distribution network through any computer from
Local Area Network or Internet.
4.Features
★Monitoring short circuit fault , earth fault ,overload and temperature, help the
operating personnel find the fault location, in older to avoid expanding the accident
★ Monitoring the changes of the line load current and displaying current
variation curve on the computer, in order to analyze the situation of the line load and
take preventive measures
★Monitoring the line temperature changes and displaying the line-voltage
variation curve on the computer, in order to analyze the situation of the line insulation
and take preventive measures
★ Adopting solar panels and back-up large-capacity maintenance-free lead
accumulator as power supply of the wireless communication terminal, in order to
ensure data communication smoothly anytime and anywhere
★Adopting short-range wireless FM communication for local network, and then
connect with the main station through China Mobile GPRS/DTU communications
system, easy to maintain
★ To install and remove without power outage
★ Printing data according to customer’s requirement
5. System Composition
Three main parts: 1、Detecting terminal 2、GPRS/DTU Data Transmission
Terminal Unit (GPRS/CDMA-DTU) 3、Backstage Monitoring Software
I Detecting Terminal
The Detecting terminal has been added current measurement, temperature
measurement and wireless communications on the basis of the traditional short circuit
fault and earth fault two-in-one indicator.
Detecting terminal
The main parts: 1) Two-way circlip
2) Identifier
3) The body of detecting
terminal
4) The displaying part
The circlip is used to fixed the detecting
terminal and wire. The two-way circlip
can fixed firmly the detecting terminal
on the wire and balance magnetic field.
When the detecting terminals finished,
Figure 1 Detecting Terminal
they will be tested by the identifier
marks (A,B,C). The body of the indicator is made of epoxy resin. There are circuits
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
and induction coil, etc. The red flag is used to indicate the fault. When the
fault occurs, it will indicate the red flag to alarm.
Features of the Detecting terminal
﹡Adopting low power consumption design for the Detecting terminal. The
working current is less than 30μA in the standby mode. It can run more than 5-8 years
on condition of only supply by the internal battery.
﹡With the traditional indicating function, the Detecting terminal also can
monitor short-circuit fault and earth fault of the system. When these two faults occur,
the indicator in front of the fault point will indicate red flag to alarm. The operator can
find out the fault point by checking the indicator.
﹡The Detecting terminal measures the line current through the internal
induction coil The measurement range is from 0 to 600A . The error range is not more
than +5%. This value can be as the subsidiary condition for judging the line work
state, also can be used for qualitative measurement.
﹡With the wire temperature measurement, the Detecting terminal can get the
real time temperature on the power lines through the temperature transducer installed
in the wire pressing slot. This can provide data for line dynamic capacity. In normal
condition, the error of the measurement is not more than +2℃.
﹡Through the internal wireless communication module, the Detecting terminal
sends the measurements and alarming results to the nearby GPRS/CDMA-DTU. The
time interval for sending is adjustable from 6 to 60 minutes by setting the parameters
of GPRS/CDMA-DTU.
﹡When the line is normal running, detecting terminal will send normal detecting
parameter. When earth fault or short-circuit fault happen, it will send the fault
information timely.
Parameter of the Detecting terminal
NO.
Name
Value
1
Applicable voltage grade
6KV~66KV
2
Applicable line current
I≤600A
3
Applicable diameter of wire
16mm 2 ≤d≤240mm 2
Operating
current
ΔI≧150A
4
Static consumption
60μW
5
6
0.5~24h(Adjustable); set by DTU
Reset time
7
Applicable ambient temperature
-35℃≤T≤+75℃
8
Times of operation
≥2000
9
Life time
＞5-8 years
10
＞20 m，barrier-free
Reliable communication distance
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
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Weight
(500±5%)g
﹡Detection basis of short circuit fault
1) Abrupt current start value: I t ≥150A,
ΔI≥0.5IL(load current>300A)
2) Lasting time of short-current:0.02S≤Td≤
2S
3) Outage after fault (voltage=0,current=0)
time:Tbk≥0.2S
﹡Detection basis of earth fault
1)Current of capacitance discharging:
Icp≥300A
2) Time of Under-voltage after earthfault:
Tbku≥2S
﹡Current measurement
Measurement range:0～600A
Measurement accuracy: ±5%﹡
Detection basis of short circuit
fault
﹡Temperature measurement
Measurement range:-50℃～125℃
Measurement accuracy: ±2℃
﹡Timeinterval
Adjustable range:6～60minutes
Measurement accuracy:1minute
II GPRS Data Transmission Terminal Unit (GPRS/CDMA-DTU)
No more than 30 meters away from the Detecting terminal, GPRS/CDMA-DTU
Data Transmission Terminal Unit is installed on the line pole. Through the
high-frequency wireless module, it receives the measurement and alarming data. After
storing and processing the data, it connects with GPRS/CDMA communication
network by the mobile module and connects with the backstage server by
GPRS/CDMA network. According to the agreed communication protocol, it sends the
monitoring data to the backstage server and receives the control command sent by the
backstage server to achieve the bidirectional controllable operation of the whole
monitoring system.
GPRS/CDMA Data Transmission Terminal Unit contains: Data Transmission
Terminal Unit and the Solar panel.
Figure 3 Solar Panel
Figure 2 GPRS/CDMA-DTU
【GPRS/CDMA-DTU Internal Structure】
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
Figure 4 is the internal structure of GPRS/CDMA-DTU. When system is
normal running, the indicator light for checking solar panel, wireless communication.
If there are problem, the indicator light will not flash.
Figure 4 GPRS/CDMA-DTU Internal Structure
The internal part of the GPRS/GPRS-DTU is made of four parts:
1) Battery module
2) Control main board module
The power of Battery module supplied by system and solar panel, which can
make uninterrupted communication for longtime when rainy days. Adopting low
power consumption design for the DTU, the average operating current of the DTU is
less than 50mA. When the lead-acid battery is filled, it can operate steadily more than
10 days without the energy supplied by the solar panel.The control main board is used
to achieve the operating control of the whole DTU,including the measurement of the
voltage of the battery, charge control, wireless module control and GPRS networking
communication control.
Features of GPRS-DTU
☆The lead-acid battery is used to supply working energy for the
GPRS/CDMA-DTU. When it’s sunny day, the lead-acid battery will be charged
through the solar panel, which meets the requirement of independently working in the
wild.
☆When installation, the GPRS/CDMA-DTU should be installed vertically on
one side of pole arm, what’s more, there is not any metal between the pole line and
detecting terminal. Keep the solar panel toward south, Keep 45℃with the horizontal
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
plane, then connect the solar panel and GPRS-DTU with charging wire.
Parameters of the GPRS-DTU
NO.
Name
1
Applicable ambient temperature
2
Applicable elevation range
3
SIM Card
4
Mobile signal strength
5
Time of working without charging
6
Solar Panel
7
8
9
Life time
Weight
Volume
Value
35℃≤T≤+45℃
0km≤H≤3km
GSM Mobile
＞5 (equal to -90dbm )
≥10 days
9V,10W(according to the weather,
expanding capacity)
＞5 years
4Kg(excluding solar panel)
25*20*10(cm)
III Backstage Monitoring Software
As the server of the whole system, the backstage monitoring software receives
all of the data sent by the GPRS/CDMA-DTU, then judges and stores all of the data,
at the same time, setting the DTU system though SMS cat, receiving message about
fault and sending the fault message to the specified mobile phone. Then the users can
get the operating state of the whole power distribution network easily.
The Backstage Monitoring software adopts the B-S structure, and includes the
monitoring software part and WEB webpage service part. Server installed
SQL-Server2000, Tomcat 5 web-server software and Windows XP operating system
are required.
The monitoring software is used for controlling the DTU networking, and
receiving the data, judging and storing the data. Control the DTU through the SMS
car. Receive the message data from the DTU and send the fault message.
The Webpage service software is used for monitoring the webpage and viewing
the monitoring data through the browser. Every LAN (local area network) computer
can be used to check the monitoring information.
(1) Monitoring Software
The backstage monitoring software works as background server. It requires a
fixed public network IP address and opens the 2404 interface, which is used for
receiving monitoring data and the application of the SMS receiving and sending.
After the start of monitoring software, it’s necessary to enter right user name and
password for safety. Then it will display the main interface of the monitoring
software.(Figure 5)
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
Figure 5 Main Interface of Backstage Monitoring Software
Main interface includes: System Menu, System Information Area and Data
Display Area.
★System Menu: above the main interface, it can control various monitoring and
display data by operating the system menu.
★System Information Area: on the left side of the main interface, used for
displaying User unit, IP address, Monitoring port, SMS car serial port, Master control
phone number and subordinate phone number.
★Data Display Area: on the right side of the main interface, used for displaying
the condition of network, installation information and various data receiving in chart.
Switch the display interface by the submenu in the display menu of list.
(2)Webpage Service Software
Webpage service software is used for making the dynamic webpage. Every LAN
computer can be used to check the monitoring data and for printing.
For server host, you can input the website in browser to access the monitoring
webpage. The website is “http://localhost:8080/pdjc/monitor.htm”. For LAN (local
area network), replace the “localhost” with IP address. As following picture:
(Figure 6)
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
Figure 6 Navigation Interface
User can look at the line current according to the link in the webpage. The line current
graph as following: (Figure 7)
Figure 7 No 001 monitoring point Current Curve
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
Note: the above graph shows monitoring data of the NO001 observation point a
day. We can learn about the load variation trend from above graph, which will help us
to observe the line working situation.
(3) The requirement for the computer
The Backstage Monitoring System is used for receiving the monitoring data, so
fixed Public network IP address, SQL-Server2000 database and installing Tomacat
5.5 are required (ADSL or Private network APN):
Memory Capacity:≥1G
Hard Disk Capacity:≥100G
CPU Speed: ≥1G
6. Example
Figure 8 is a picture from Shang Qiu of He Nan Province. The detecting
terminals are installed on the overhead line. DTU and solar panel are installed on the
middle of telegraph pole
Detecting Terminal
GPRS/CDMA-DTU
Solar Panel
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北京昊创瑞通电气设备有限公司
Beijing HCRT Electrical Equipment Co.,LTD.
The product is deeply trusted by users because of the reliable performance
and high quality. Now the system is successfully applied in Zhouning Power Supply
Company of Fujian Province, Zhu Madian Power Supply Company of Henan
Province, Wen Nan Dali Power Supply Company of Shanxi Province, Ningbo Power
Supply Company of Zhejiang Province, Shandong Province and so on. At the same
time, Our company is opening the international market and we are making technical
communication with India, Indonesia, Vietnam.
Address: Room 2710,Building No.3,So Boss & Box Center No.16 Nan San Huan
West Road, Feng Tai District, Beijing, China
Contact person: Annie
Tel : +86 010 87576108 ext. 8010
Fax : +86 010 87576108 ext. 8015
E-mail: [email protected]
RUL: http://en.bjhcrt.com/
Skype: rainbow2667
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