Welcome to the peak summer protection power supply 丨 create a strong distribution network to make power supply more reliable

At present, it is the critical stage of the peak summer, and the strong and reliable power supply network is essential for power supply. The company's middle -aged work conference requires continuously improving the adaptability, reliability, and digital and intelligent level of the distribution network. All units of the company have further promoted the construction and operation and maintenance work of the distribution network, and started to build a strong distribution network from many aspects such as improving the automation level of the power distribution network, carrying out power -based operations, and application advanced digital technologies.

Optimize grading protection and fast isolation failure

"Short -circuit failure of the 10 kV eleven lines, please arrange personnel to go to the scene as soon as possible." At 18:32 on July 17, Geng Donghai, a regulatory operation team in Zhangjiagang, Jiangsu Zhangjiagang City The main station, Chang Zhijian, staff member of the power distribution inspection center of the company, sent a line failure warning information. Chang Zhijian immediately called Wang Gaobin and three other team members to go to the scene to deal with the failure.

The 10 kV eleven line line mainly undertakes the power supply task of 104 customers in Sanxing Street in Jinfeng Town. Due to the hierarchical protection switch of No. 16-1 to 2 of the eleven-sloping line branch and the 28th in the middle section, when the fault occurs, the switch will switch within 0.2 seconds. Influence. At 19:45, after on-site investigation, the repair personnel found the fault point at the 31-1-1 pole, and the fuse of the declining fuse of the branch line was broken. At 20:47, the fuse was replaced, and the electricity was restored on the entire line.

Employees of State Grid Jiangsu Taicang Power Supply Company carried out electricity in 10 kV lines.

In order to ensure the reliable supply of electricity during the peak summer, State Grid Jiangsu Electric Power Co., Ltd. reasonably formulates fault search and emergency repair strategies, and quickly restore customer power supply by improving the accuracy of the distribution network. Optimizing the distribution network hierarchical protection strategy is one of the specific measures.

On June 6, the real -time verification and push function module developed by the State Grid Jiangsu Electric Power led the development and the push function module was promoted and applied at each power distribution automation of power supply companies in 13 cities in Jiangsu Province. This module can determine whether the line is normal running according to the historical operation records, and determine whether it is a real trip in accordance with the changing characteristics of the changing value of the switching current value before and after the fault. The triggered hierarchical protection switch checks out, generate events information, and timely push to power supply services and operation and maintenance personnel.

At present, Suzhou Power Supply Company has transformed 4091 graded protection lines, and the classified protection switch successfully moves 356 times, and the average recovery time of the fault is shortened from the original 30 minutes to 120 seconds.

Carry out power -based operation guarantee customer electricity consumption

At 9 o'clock on July 19, in Hefei City, Anhui Province, a bucket car carrying the arms robot was parked under the line of 10 kV Innovation Avenue 18 switch lines. Tong Zhongyu, the person in charge of the work of the Hefei Power Supply Company's Power Network Operation Center, led Zhang Zuosheng and other employees to use the robot to use the electricity to install the fault indicator.

From early July to the present, the continuous high temperature weather has continuously increased the electricity consumption of Hefei. In addition, with the effectiveness of various helping companies' relief policies, economic indicators such as industrial investment in Hefei have increased significantly. Hefei Power Supply Company's distribution network operation center has carried out power -based operation and applied power distribution automation systems to ensure reliable power supply.

On the same day, Zhang Zhaosheng first sent the arms robot on the car to the line to allow the robot to scan the line to determine the installation location. The other two employees select the robot work project on the tablet and check the parameters. Then, Zhang Zhaosheng put the fault indicator into the robot's arm, and then started the arm car to send the robot to the air. The robot regulates the arm independently and accurately puts the fault indicator card online. Less than 10 minutes, all 3 indicators were installed.

"When the line occurs short -circuit or single -phase ground failure, the fault indicator will issue alarm information, and we can judge the range of fault by observing the fault indicator, and the efficiency of the repair is naturally improved." Tong Zhongyu said.

State Grid Anhui Hefei Power Supply Company employees use robotics to assist in completing the power operation.

At this time, at the Hefei Power Supply Company Distribution Network Operation Center, Huang Yunlong was responsible for the joint adjustment of a brand -new loop network cabinet with the main station of power distribution automation. "The closing signal and the cards have been transmitted back to the main station system of power distribution automation." Huang Yunlong confirmed with the staff of the main station.

According to Huang Yunlong, the circular network cabinet will be sent to the scene to install it directly, which can greatly shorten the time of the line maintenance. After the joint adjustment, when there is a failure of the distribution line, the qualifying switch of the ring cabinet can stick to and isolate the fault point within 60 milliseconds. After big data analysis, the main station system of power distribution automation will transfer the power load of the faulty line to the appropriate line. The length is 2 to 3 minutes, and the shortcoming area can be restored to power supply.

This year, the State Grid Anhui Electric Power Co., Ltd. accelerated the automation of power distribution automation, and deeply tapped the value of the data value of power distribution automation. Relying on the intelligent integration terminal and power grid topology of the Taiwan area, based on the collaboration of "end, edge, cloud", promoted the application of the distribution network Single -connected ground line inspection and fault positioning assistance method, compressed fault search time 1.38 hours, improved failure repair efficiency by 46.8%.

The distribution network automation operation and maintenance failure "second -level self -healing"

At 6:04 on July 15th, a cable that was powered by the 10 kV Want Want -Ⅰ circuit of Changsha, Hunan Province failed, and Hunan Wangwang Hospital started the single power supply operation. The power distribution automation system accurately judges the fault point through the feed automation function. The fault successfully "heal" within one minute, and the hospital restores dual power supply power. The feed line automatic abbreviation referred to as FA, which refers to the analysis and positioning of the power distribution line failure and the execution of faults isolation and the restoration of power supply in the non -faulty area.

Employees of State Grid Hunan Changsha Power Supply Company discussed the testing plan for feedback automation function.

Changsha Power Supply Company has taken the lead in applying a fully automatic FA function in Hunan Province since May 2020. The fully automatic FA function can quickly locate the fault section according to the fault signal of the distribution line, and through the system automatic remote control power distribution switch, the fast isolation of the power distribution line failure and the automatic power supply power supply power supply. The company continues to explore, improve technology, and promote the becoming more mature for automatic FA applications.

In March 2021, Changsha Power Supply Company deployed the level of power distribution automation and practicality to improve the tackling project, which clarified a total of 25 tackling tasks in 7 aspects. The company organizes a monthly power distribution automation operation analysis meeting to promote the deepening application of key technologies such as fully automatic FA and remote control; formulate the introduction of power distribution automation data governance solutions, and use the experience of data governance to further improve the management level of power distribution automation systems. At present, the company's various indicators of power distribution automation ranks first in cities in Hunan, and the level of power distribution automation is close to the domestic advanced cities.

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