The province is leading!The line "cold and fever" can "self -healing", Henan Liyang built a "distribution network self -healing demonstration zone"

Elephant Journalist Liang Xinhui Correspondent on Tuesday Yan Ding Nan/Wen Tu

The Central Plains has entered Sanfu Tian, ​​and the city power grid has also entered the critical period of "peak summer". For citizens, as long as the power supply is normal, the hot summer is not a problem. But in fact, the urban area with a network line is like a person. When there will always be fever, colds, and sneezing, the distribution network has abnormal or faults, which means that users in some areas have power output. The normal life of citizens has a certain impact.

(State Grid Langyang Power Supply Company Power Schedule Control Center)

Today, a good news is here: Puyang City, Henan Province, took the lead in building a county in the "Smart Self -healing Demonstration Zone" in the county. On the 11th network lines in the urban area, if the "fever" is "cold" somewhere, the system will quickly determine the fault point, and at the same time achieve rapid isolation and load transfer, thereby improving the efficiency of accident disposal, realizing the scheduling of the distribution network from blind from blind Make a major change in active repair.

[Change] Originally, the entire line was to be stopped, and now only three households are affected

46 -year -old Zhang Tao is a power distribution worker in the Power Supply Department of Chengxi Power Supply Company of State Grid. He has participated in the work for 23 years. I was handy, but in recent years, I have been a little confused.

"City distribution network, just like people, running for a long time, will also" have a fever and catch a cold ". Once the line fails, we will rush to the scene to investigate and confirm the fault. Electricity often requires two or three hours. Although most citizens understand it, after all, it has a wide influence. "On July 18, in an interview with Elephant Journalists, Zhang Tao talked about the past, and then talked about it: Now we build it. After the "Smart Self -healing Demonstration Zone", the problems that troubled us for many years were solved.

(Staff patrol the line and measure the temperature)

What happened on June 4 this year impressed Zhang Tao.

The 110 kV Cao Li changing power station in Liyang City has been launched to power in multiple areas of Puyang City. Among them, located on the line tower of Kangtai Road, there are also 35 board Cao Kang line and 38 board Caotai line. The power supply range covers multiple sections such as Kangtai Road, Industrial Road, and Jingcheng Road. There are 61 high -voltage users.

"At 11 am that day, the line in front of the gate of the third middle school of Kangtai Road failed to fail. While receiving the public's report, we also received a notice from the company's power dispatch control center and quickly arrived at the scene." Zhang Tao said that the faulty line Located between Caokang Line 20 and Pink 21. "The remote control center of the company's power scheduling control center disconnected the switch on the closest to the closest to the fault point, and then the remote control was connected to the contact switch. The load is transferred to other routes around the surrounding lines. That is to say, only three users between the 19 and 23 of the rods were powered out, and the range of faults was sharply reduced. "Zhang Tao lamented that in the past, 61 high -voltage high -voltage led by the entire line, Users have to stop power. Since the construction of the "Smart Self -healing Demonstration Zone" of the distribution network, the power supply of most users is no longer affected.

(Electricity scheduling control center)

[Step] It used to be unhappy before, but now it is quickly determined by the fault point

Zhang Tao said that the "Smart Self -healing Demonstration Zone of the Way" cannot be underestimated.

"Since the establishment of the intelligent self -healing demonstration area of ​​the distribution network, our distribution network scheduling has realized the transformation from the" blind adjustment 'to the' bright adjustment ', from passive scheduling to active scheduling. " Ma Yuan, director of the dispatch control center, described it.

Ma Yuan said that before 2021, if a line failed, they could only see that the load suddenly decreased, but why the load decreased, everyone didn't know. In the end, it is the main line to check the section or the branch line. I don't know. In the end, there is a failure, but I still don't know.

"If there are two ways to find the fault point: one is to receive a report from the masses, we notify the operation and maintenance personnel according to the regional reflected by the grassroots people to find the fault. The other method is to find the personnel organized by the power supply center. Because the line is long, the line is long. It often takes a long time to consume a lot of manpower and material resources. Even if the failure is found, it is necessary to organize the repair. The entire line must be controlled, which has a greater impact on the normal power consumption of residents and enterprises. "

(The controller and switch are installed on the line)

In this case, in April last year, the State Grid Langyang Power Supply Company decided to build a "distribution network intelligent self -healing demonstration zone" to achieve the goal of quickly determining the fault point and achieve the goal of rapid isolation and load transfer.

According to Yang Yan, deputy general manager of the Power Supply Company of State Grid, the construction of the self -healing demonstration area is mainly divided into four steps: First, the choice of the demonstration area. The 10 kV lines in the main urban area of ​​Liyang City have a total of 190. This time, 11 lines in the population dense area of ​​the urban area are selected as the first phase of construction. The second is to transform 11 lines to allow it The structure of the grid; the third is to upgrade the terminal of the 11 lines. In other words, intelligent controllers and switches are installed according to the situation; With the rectification, the remote maintenance terminal technology of the power distribution automation system is used to set the line switch fixed value to accurately reduce the range of fault.

(Various data is clear at a glance)

[Prerequisites] You can build it if you want to build it. You must have a big "backer", "Construction of the Smart Self -healing Demonstration Zone of the Watching Network, and you can build it. . "State Grid Langyang Power Company's Electric Power Company's Electric Power Schedule and Control Center said that it was the main station system of the power supply company of Puyang City relying on the main station system of power supply and automation of the State Grid Zhengzhou power supply company.

As we all know, the power supply of millions of households in urban distribution networks. Prior to 2021, the distribution of the distribution of the power supply company of Puyang City was still paper. What changes in the distribution network and the drawings cannot be updated in time. As a result, the drawing is inconsistent with the actual situation. In addition, the power -to -power perception ability of the network is also very limited. For example, a place has a trip, and it is still at the stage of waiting for client failures and the passive perception of power companies.

The traditional power distribution automation system adopts an artificial drawing mode, and then moves the paper content to the line. As a result, there is a digital barrier between different systems.

How to solve this problem? They aimed at the PMS system (distribution information system).

(Automatically generated by power distribution automation graphics)

It turned out that the PMS system was the "big manager" and "living map" of the entire distribution network equipment. It was as large as transformers, lines, small to switches, knife gates, and lightning arms.

"The power grid equipment marked in the PMS system is the most accurate and most complete. Therefore, when we build the power distribution automation system, we use the PMS system as the data source to allow the system to push us the model of the distribution device to achieve it, so as to achieve the realization The automatic generation of power distribution automation graph model. "Cui Ke said, this is the" only source, penetration push "often said in the industry, ensuring that the distribution network" is consistent and the state is consistent " The mold is 100%full coverage.

After the power distribution automation system is built, it is necessary to optimize the terminal transmission process to achieve the "Sanyao" charging transmission. The so -called "Sanyao" is the "remote letter" that master the basic information such as switches and other devices, and clarifies the "remote test" of switch voltage, current, and power power data to control the "remote control" of the switch operation.

In

[Objective] This year's main urban area has completed the construction task, and the failure of the fault healing is self -healing

On September 26 last year, the State Grid Langyang Power Supply Company fully implemented the automation and practical operation of power distribution. On May 24 this year, they successfully completed the first set of self -healing function of Puyang. Through the accurate positioning, rapid isolation and load transfer of the faulty of the distribution network, improve the efficiency of accident disposal, and realize the profound transformation from blind adjustment to active repair.

"Since the distribution network has the self -healing function, through the main station concentration+level difference protection collaborative disposal strategy, each failure can be isolated in sections, and other segmented loads can fall out. Due to the long problem of cooperating and the long operation time of artificially inverted, it greatly shortens the operation time of the fall, reduce the power outage time, and reduce the power outage area.

Talking about the self -healing function of the distribution network, Wang Haipeng, the director of the company's Chengdong Power Supply Department, was excited: the main line, branch line, and user division were installed with switches, so as to achieve "the user fails to go out, the branch failure does not enter the station. The trunk fault is not stopped. "No matter where the failure occurs, the scheduling will accurately inform the fault section. We no longer have to toss back and forth, and we no longer need to climb the pole to find the fault.

The data shows that in the first half of last year, the number of households in Puyang Power Supply Company of State Grid consumes a total of 23813.6 hours. The average power outage time is 3.91 hours, far exceeding the standard requirements of 183 minutes in the Class B area. Through the construction of the self -healing demonstration area of ​​the system and power distribution, the company consumed the number of households in a total of 9096.8 hours in the first half of this year, a year -on -year decrease of 61.8%, and the total power outage time was 1.272 hours.

"Continuous power is the best service. Continuously improving the quality of power supply and continuously improving the sense of happiness and gain of the masses is the goal of our unchanged struggle." Yang Yan, deputy general manager of Puyang Power Supply Company of State Grid, revealed that this year, the Lord of Puyang The urban area will complete the construction of the "Supporting Network Intelligent Self -healing Demonstration Zone" to achieve the full coverage of the "Sanyao" terminal and the wiring failure in minutes.

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