On May 31, the 2018 Power Reliability Index Conference and Safety Production Month Launch Conference was held in Beijing. At the meeting, the National Energy Administration and the China Electricity Council jointly issued the 2017 National Electricity Reliability Annual Report. The report shows that in 2017, in the ranking of the full-caliber blackout time of more than 400 prefecture-level power supply enterprises in the country, the power supply reliability of Guangdong Foshan Power Supply Bureau of China Southern Power Grid ranked first in the country, and the average power outage time of users was 2.28 hours/household, Shenzhen and Guangzhou. Dongguan, Zhongshan Power Supply Bureau ranked 2, 3, 5, 9 people. Excluding the major event day, 6 units of China Southern Power Grid entered the top ten of the national full-caliber power outages. Among them, Zhongshan, Zhuhai, Foshan, Shenzhen, Guangzhou, and Dongguan Power Supply Bureaus ranked 1, 2, 3, 4, 5, and 7 . Among the provincial power grid companies, the average power supply reliability rate of Hainan and Guizhou power grid companies increased by 38.4% and 35.34%, and the average power outage time of users decreased by 16.3 hours/household and 12.0 hours/household respectively. At the meeting, the Zhuhai Power Supply Bureau made an exchange speech on improving the reliability of power supply and optimizing the business environment.
Improve power quality and improve business environment
The Business Environment Report 2017 released by the World Bank has evaluated the access to electricity in some cities in China. The reliability of power supply is one of the evaluation factors. In recent years, China Southern Power Grid Corporation has continuously improved its development quality and efficiency, vigorously improved power supply quality and services, and optimized the power business environment. Li Qingkui, party secretary and chairman of China Southern Power Grid Corporation, demanded that the enterprise tenet of "the people's electricity industry be the people" should be deeply practiced, and the hot issues of customer complaints such as power cuts, low voltage, and slow repairs should be effectively solved, so that the people can use electricity. Use electricity well. Cao Zhi'an, the company's director, general manager and deputy secretary of the party group, called for a major reduction of 12,398 complaints, complementing the distribution network, strengthening power supply reliability and power quality management, and continuously improving customer service.
From May 1 this year, the first self-trade zone power supply and consumption rules promulgated by the Zhuhai Hengqin New District Management Committee was officially implemented, mainly including improving the reliability of electricity consumption, reducing the cost of electricity for customers, and improving the efficiency of customers' electricity. The establishment of a new type of power supply and consumption relationship, Zhuhai Power Supply Bureau has also become a pioneer in the exploration and optimization of the business environment and innovation management model. At present, Zhuhai Power Supply Bureau has built the first 20 kV double-chain gridded closed-loop operation line in Hengqin, which can realize fast (millisecond) positioning, isolation and self-healing of non-faulty segments, and the reliability of power supply is 99.999%. The average annual power outage time of users is only 5 minutes, reaching world-class level.
The 2017 National Electricity Reliability Annual Report pointed out that in 2017, the main factor affecting the reliability of power supply throughout the country was pre-arranged power outages, accounting for 65.17% of the total power outage time. In this regard, China Southern Power Grid Co., Ltd. on the one hand to strengthen basic management, strengthen integrated power outage management, on the one hand to promote distribution automation, drones, live working and other "flexible and diverse" tactics, further improving the reliability of power supply.
On May 12 this year, the two 110 kV substations of Guangdong Huizhou Power Supply Bureau of China Southern Power Grid were simultaneously power-off and transformation, realizing the non-stop customers. According to reports, the power grid reconstruction, the Southern Power Grid Guangdong Power Grid Company through the unified dispatch of the province's emergency power generation vehicle support, integrated power outage management, power supply and other means to ensure that the 79,000 residents in the power supply area is not affected, continue to use normal electricity There was no customer power outage during the construction period. The data shows that in 2017, China Southern Power Grid Guangdong Power Grid Co., Ltd. implemented a total of 16812 power transmissions, reducing the average power outage time of users by 6.3 hours; China Southern Power Grid Corporation implemented 86,067 times of distribution network live operation, an increase of 37.7% year-on-year, reducing the average power outage time of customers ( Medium pressure) 4.83 hours.
Actively explore intelligent control
“Automatic collection of power outage events, automatic statistics of power outage time, online analysis of power outage dataâ€. In recent years, China Southern Power Grid Corporation based on the actual work of the grassroots level, perfected the management process, optimized the management model, and consistently promoted “a set of data, multi-party applicationâ€, and the power supply reliability management method is more intelligent and efficient.
In 2016, China Southern Power Grid Corporation defined the strategic development goals of “185611â€. The first “1†is: the average power outage time of customers in the central city of the company is less than 1 hour, and the average power outage time of customers in 10 urban areas such as Guangzhou and Shenzhen is less than 1 hour. In recent years, China Southern Power Grid Corporation has continued to do a solid job in power reliability management, and issued the “Improving Power Quality and “185611†Power Outage Time One-Hour Action Plan (2018)â€, from grid equipment, lean management, and new technology applications. In terms of information promotion, we will promote the optimization of grid structure and improve equipment quality, pay close attention to lean operation and maintenance of distribution network, promote the application of new technologies, and continue to deepen the system mechanism of planning, construction, production and customer service, and continuously reduce power outages. Time, improve the business environment, let the people use electricity and use electricity.
Focusing on the customer, China Southern Power Grid has deepened the improvement of power supply reliability measures from various levels, and the effect is beginning to appear. According to the 2017 National Electricity Reliability Annual Report, in 2017, the average power supply reliability rate in the southern region increased steadily year-on-year. The power supply reliability rate of China Southern Power Grid Corporation was 99.818%, and the average power outage time of medium voltage users (medium voltage) was 15.96 hours/household. Both are better than the national average. The power supply reliability rate of Hainan and Guizhou Power Grid Corporations increased significantly by 38.4% and 35.34%. Foshan Power Supply Bureau decreased by 56.3% year-on-year in terms of power outage time in power supply cities in 39 major cities across the country.
The delivery of clean energy requires a safe and reliable delivery path. In terms of DC system reliability, the comprehensive energy availability rate of the DC system under the jurisdiction of the South Network is 96.45%, which is better than the target value of 1.45 percentage points. It has remained at a high level of over 96% for seven consecutive years, which is higher than the national average of 1.7 in the past five years. Percentage, keep the domestic lead. Among them, Gaoqi DC, Xing'an DC, Tianguang DC energy availability rate ranked 1, 2 and 4 in the energy availability rate of 14 UHV DC transmission systems nationwide.
"The highest level of power supply reliability is to make customers aware of the existence of the power supply department, and to always enjoy a stable and stable power supply service. It is a natural thing in daily life like breathing and drinking. It can be said that 'no sense of existence' is precisely What we are pursuing.†The relevant person in charge of the Production Technology Department of China Southern Power Grid Corporation stated that in the future, China Southern Power Grid will further increase its efforts to promote the application of advanced technologies such as distribution network live working, distribution automation, drone inspection, and intelligent power distribution room. Improve work efficiency, reduce customer downtime and frequency, and continuously improve the business environment.
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