I. Basic overview of the project

1. Project address and transportation: SDIC Panjiang Power Generation Co., Ltd. is located at No. 126 Yunfeng Road, Shuji Yunzhong Neighborhood Committee, Boguo Town, Panzhou City, Guizhou Province, about 70km from Panzhou City and about 482km from Guiyang City. The altitude is 1670 meters above sea level. Under the precondition of ensuring the performance of the equipment, the bidder shall fully consider the impact of high altitude on the equipment. Highway: There are two main highways from Guiyang to Panzhou: G60 National highway and G320 National highway, and there are two highways from Panzhou to Sprinkji: S212 provincial highway and Shuipan Expressway (from Yuge toll station off the highway). Railway: There are Wei (She) Hong (Guo) branch line of Nan-Kunming Railway, Qu (Jing) Hong (Guo) branch line of Gui-Kunming Railway, Shui (Cheng) Bai (Guo) Railway, and a number of special railway lines.

2. Project Overview: Sdi Panjiang Power Generation Co., LTD. 220kV booster station GIS switch room SF6 gas online monitoring device and operation information management host computer are produced by Guangzhou Hao Telephone Gas Automation Co., LTD. The device has been in operation for 6 years, the monitoring device screen failure, laboratory pump failure, the manufacturer's equipment has been updated, spare parts are no longer produced. And it can not meet the technical supervision requirements of China Southern Power Grid "Power Equipment Maintenance Test Regulations" (2017 edition). Now a new Wevers detection WINFOSS-S1P SF6 gas leak online monitoring equipment has been replaced.

Main function of system

1 Detection and display of excessive SF6 gas concentration

The detection signal is triggered in real time, and the onsite host dynamically displays the SF6 concentration status at each gas probe in the GIS room. When the concentration exceeds 1000 PPM (users can set the alarm threshold between 100 and 1000 PPM), the SF6 concentration under the exceeded state is displayed in red font; otherwise, the SF6 concentration under the normal state is displayed in green font.

2 Oxygen content detection and display

The detection signal is triggered in real time, and the on-site host dynamically displays the oxygen content value at each gas probe in the GIS room. When the oxygen value is 18.0%, the red font indicates the oxygen value, otherwise the green font shows the actual value.

3 SF6 concentration and oxygen content control function

SF6 gas concentration exceeded 1000ppm (national standard value) or oxygen content ≤ At 19.6% (national standard value), the system automatically controls and starts ventilation until SF6 concentration and oxygen content return to normal.

4 Monitoring unit communication status display

The field host takes turns to detect and display the communication status between the monitoring unit and the host in the GIS room. If any monitoring unit fails to communicate, the field host will prompt the monitoring unit to communicate the fault in real time.

5 Ventilation at regular intervals

The system can set multiple periods of time (users can define up to 8 periods) for the fan to start and stop regularly every day to ensure that the GIS room can be ventilated as needed every day. Continuous ventilation time of 23 hours and 59 minutes; To short sustained ventilation time 1 minute.

6 Abnormal SF6 concentration and oxygen content are automatically ventilated

If there is no forced ventilation or set ventilation period, the system starts the fan for ventilation when detecting abnormal SF6 concentration and oxygen content. If the monitoring unit detects an abnormal SF6 concentration or oxygen content within 15 minutes from the start, the time starts from the newly detected time, and the system automatically shuts down the fan after 15 minutes.

7 Forced Ventilation

When the fan is stopped, press the host touch screen interface “ Manual/automatic ” Ventilation switch button, the system can be forced ventilation; When the fan is running, press the host touch screen interface “ Manual/automatic ” Ventilation switch button, the system will forcibly shut down the fan. You can view the current fan running status in the upper right corner of the display.

8 Temperature detection and display function

The system detects and dynamically displays the current GIS indoor temperature through the temperature and humidity monitoring unit.

9 Humidity detection and display function

The system detects and dynamically displays the humidity in the GIS room through the temperature and humidity monitoring unit in real time.

10 Voice prompt function

When the onsite host detects an environment exception, it prompts the alarm by voice to remind the staff to leave the site and query the leakage situation. Under normal circumstances, when the staff is close to the host area within 5M, the host automatically prompts the current environment status. Real-time voice on/off status is displayed in the upper right corner of the display. And has voice on/off voice function.

11 Optical alarm function

When the host detects that the ambient SF6 concentration or oxygen content exceeds the limit, the alarm device on the control host blinks to remind the staff that the indoor environment is in a dangerous state and they can enter the room only after the safety is restored.

12 Human body infrared sensing function

When the staff in and out of the GIS room, through the human body infrared sensor detection, the system automatically prompts the safety of the environment. And switch the host display from the low power screen saver state to the normal display state.

13 Historical monitoring data storage function

32M large-capacity data storage space, used to store historical data, and in the case of power failure, the data can be stored for more than 5 years.

14 Query historical data

You can query historical data in any time period by going to the Query historical data page on the menu item of the onsite host.

15 System self-check function

A separate self-check module is designed on the internal hardware structure. When detecting the abnormal or abnormal operation of the main system program, it automatically resets and imports the backup program, so that the system can restore the normal working state in time.

16 Remote alarm function

The onsite host provides two sets of passive hard contacts, normally open and normally closed, which operate when the SF6 concentration or oxygen content is abnormal. Users can connect the remote communication devices (such as the Nanrui RTU) in the main control room to realize remote alarm of the scheduling center. To prompt the staff to go to the site inspection or to carry out leak detection work.