Power supply reliability management is one of the important indicators of power quality management, and it is also an important indicator for power supply enterprises to continuously and reliably supply power to users. Through the analysis of the power grid, this paper puts forward some measures to improve the reliability of power supply for 10KV users, that is, by improving the reliability of power supply for high-voltage users, strengthening the operation management, maintenance and transformation of 10KV power grid, and improving the reliability of power supply for 10KV users.
Keywords: analysis of power supply reliability measures
Introduction to 0
Users of power supply system are divided into high-voltage users, 10KV users and low-voltage users. High-voltage users refer to 35KV and above power users, 10KV users refer to 10(6, 20)KV power users, and low-voltage users refer to 380V/220V power users.
Improving the power supply reliability of 10KV users can be achieved through the following ways: ① improving the power supply reliability of 10KV users by improving the power supply reliability of high-voltage users; ② By strengthening the operation management, overhaul and transformation of 10KV power grid, the power supply reliability of 10KV users can be improved.
1 Improve the power supply reliability of 10KV users by improving the power supply reliability of high-voltage users.
After summary and analysis, I think that improving the reliability of power supply for high-voltage users can be achieved by the following measures:
1. 1 Strengthen the operation management and preventive test of high-voltage users, eliminate hidden dangers and defects of high-voltage users' equipment in time, and improve the health level of high-voltage users' equipment.
1.2 for the maintenance of high-voltage users, adhere to the principle of condition-based maintenance, fully implement the relevant provisions and requirements of the Power Cut (Power Limit) Management Order of Shaanxi Local Electric Power (Group) Co., Ltd., and ensure that the maintenance of 35KV electrical equipment is not more than twice a year.
1.3 Strengthen the professional skills training of substation operators. Through business skills training, the analysis ability, skilled operation ability and emergency handling ability of substation operators are improved, thus reducing the power outage time of substation equipment.
2 indicators to improve the reliability of power supply
Power supply reliability of power supply system refers to the ability of power supply system to continuously supply power to users. Power supply reliability refers to the ratio of the total hours of effective power supply time of users to the hours in the statistical period. To improve the reliability of power supply for 10KV users, it is necessary to: ① reduce the duration of each power outage; (2) reduce the number of power outages each time; ③ Reduce the number of power outages.
3 Measures to improve the reliability of power supply analysis
Measures to achieve the above objectives:
3. 1 Strengthen the preventive test and defect management of equipment, eliminate hidden dangers of power grid and equipment in time, and improve the health level of equipment;
3.2 Reasonable preparation of monthly maintenance plan. When making the monthly maintenance plan, we should take the necessity and urgency of power outage as the objective basis, adhere to the principle of measuring first and compiling later, strictly control the hours of power outage, and ensure the reliability index of power supply within the specified range.
3.3 Strengthen the management of equipment maintenance, engineering construction, fault repair and temporary power failure. Equipment maintenance and engineering construction, to achieve the work plan, oil construction plan, the implementation of safety measures, equipped with necessary tools, transportation, communication equipment, etc. , to ensure the smooth development of maintenance and construction work. During emergency repair and temporary power outage, improve the comprehensive quality of maintenance personnel, speed up maintenance, construction and emergency repair, and shorten the power outage time.
3.4 Strengthen power outage management. Power outage management within the jurisdiction of Chengcheng County Electric Power Bureau strictly implements the power outage (power outage) management system of Chengcheng County Electric Power Bureau, implements departmental responsibilities, and strictly stops power transmission. Shorten the switching time of equipment power failure state as much as possible, avoid repeated power failure of one line, and ensure that the number of power outages for 10KV power customers is no more than 3 times a year.
3.5 Give full play to the role of dispatching management department in power supply reliability management. At the beginning of each year, the dispatching department draws up the system operation mode of the year, and earnestly forecasts the short-term and ultra-short-term loads. According to the load characteristics of different seasons and time periods, the power grid operation mode is reasonably arranged to make the power grid operate in the safest, stable and economical way.
3.6 Strengthen the daily management of 10KV distribution network, strengthen the inspection of distribution equipment and the load measurement of distribution transformers, and timely transfer and adjust the load of distribution transformers under full load and overload operation; Strengthen the protection of distribution equipment to prevent accidents caused by external forces.
3.7 Strengthen the transformation of 10KV power grid. In the transformation, it is considered to reasonably configure the switchgear in the line according to the power grid structure. In equipment selection, try to use maintenance-free or less maintenance-free equipment to extend the equipment maintenance cycle. For example, more vacuum switches are selected in the switch selection to reduce the number of power outage users.
3.8 rely on scientific and technological progress to improve the power supply reliability of 10KV power grid. Actively promote condition-based maintenance, and carry out power outage maintenance according to actual needs through scientific means such as online monitoring. Carry out research on live working under the condition of ensuring safety, and reduce the power failure time of equipment.
3.9 Strengthen the line insulation level. In 10KV power grid, the power outage caused by the contradiction between trees and lines accounts for a considerable proportion. Especially the urban power grid, because of its special status, the contradiction between trees and lines is more prominent. Therefore, for urban power grid, improving line insulation, using the characteristics of large power supply capacity, small path and low failure rate of power cables, and increasing the number of cable lines will improve the power supply reliability of 10KV users.
3. 10 Strengthen the business training for 10KV line operators. Through business skills training, improve the line operators' analysis ability, skilled operation ability and emergency handling ability of 10KV line equipment.
3. 1 1 Establish a power supply reliability analysis system. Using the power supply reliability management software system that has been applied in the provincial company system, according to the completion of the power supply reliability index of each operating unit, the factors affecting the power supply reliability are analyzed regularly, the reasons and problems are found out, and measures are formulated to solve them.
4 abstract
Power supply reliability management, like other work, is a closed-loop management process. In order to fundamentally improve the power supply reliability of 10KV users and achieve the purpose of guiding production management, it is necessary to go through the process of finding problems, analyzing the reasons, proposing corrective measures and solving problems. As an important part of current power supply reliability management, the power supply reliability management of 10KV users should also follow this law.
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