City Power Supply Bureau work summary
The reliability of power supply reflects the power supply capability of the entire power system to the user, which is the centralized reflection of the system structure and operation characteristics. It is a comprehensive reflection of the power supply capability of the power generation of the power grid and the comprehensive management level. The true embodiment of the situation is one of the important indicators to measure whether the power supply enterprise has international advanced standards. In order to achieve the goal of leading domestic and international advanced level in five years, the power supply bureau has built a reliability management system from the aspects of management and technology through analysis and diagnosis, based on the identification of indicators and management status. The assessment system and support system have comprehensively improved the level of reliability management and achieved remarkable results.
First, find out the family, analyze the reasons, and make overall plans.
My power supply bureau conducted a systematic analysis of the factors affecting the reliability of power supply. In the first half of XX, the bureau spent more than five months to classify and calculate the data of XX years, and found out the main factors affecting the indicators. Through the statistics of the whole year of XX, the impact of various factors on reliability was clarified. size.
After analysis, the main factors affecting the reliability of power supply are weak grid and inadequate management.
1. Pre-arranged power outages are the most important factor, accounting for 82.5% of the total, of which: 70% of planned power outages and 12.5% of temporary power outages;
2. The main network factor accounts for 36.9%, mainly due to pre-test, scheduled school and maintenance power failure;
3, distribution network factors accounted for 49.1%, engineering accounted for 20.5%, the largest proportion;
4, fault power outage accounted for 15.5%, of which 10 kV medium voltage distribution network failure accounted for 14.2%, is an important reason affecting reliability;
5, the user industry expansion project access and other reasons for power outages also accounted for a certain proportion, reaching 12%.
To this end, on the basis of analyzing and clarifying the situation, the SIPO adopted the overall consideration of nearly two months, solicited opinions from many parties, clarified the working ideas for improving the reliability of power supply, formed a global work plan, and formulated targets for each stage. A five-year work plan to improve the reliability of power supply, pointing out a clear strategic direction for future initiatives.
Second, the main measures and effects adopted in XX year are the implementation of the five-year plan's phased objectives, highlighting the work priorities of different stages, and promoting various work. The Bureau has issued a series of specific measures and measures. The focus of the work is mainly on the implementation of four management measures and five technical measures, among which there are many innovative measures. At the same time, it is proposed to establish an indicator statistical analysis system based on the distribution network gis and the battalion integration platform, reduce the statistical work intensity, and ensure the accuracy of the information to provide information support means. Through the management system, the closed-loop management of “pre-event evaluation, in-process control inspection, and post-mortem statistical analysis” is realized.
Management measures
1. Comprehensively strengthen the transfer of power supply management. The reversal of power supply is currently the most important measure to improve the reliability of power supply. In XX years, the total number of power transmissions in urban areas was 1,219, accounting for 97.4% of the total number of rotations. The average power outage time of users was reduced by 3.42 hours per household, which was equivalent to an increase of 0.039 percentage points in power supply reliability and a significant increase of 33.7% year-on-year. A total of 945 power transmission plans were made for complex and important power transmission. Even if only one user can turn around in the power outage plan, power conversion is required. At the same time, the research, calculation and experiment of the joint-turn technology, and the introduction of technical principles and related management systems.
2. Strengthen the management of integrated power outages. Every month, the dispatch center will arrange the power outage plan, integrate the main, distribution network, engineering and maintenance, and user engineering, and arrange the power outage reasonably to avoid repeated power outages. In the case of a significant increase of 29.7% year-on-year in various types of engineering investment, the pre-arranged power outage decreased by 14.1% compared with the same period, reducing the user's power outage time by 1.52 hours/household. Some district bureaus organize hundreds of people to work at the same time, and multiple power outages are carried out at the same time, reducing the time and number of power outages.
3, refined management, optimize the workflow, reduce the power outage process time. Develop power supply reliability process indicators, optimize refinement process management, and reduce user power outage time in detail. A power-off and power-off operation task arranged two groups of people, compressing the power-off time, the average power-off time was reduced from the original 40 minutes/time to less than 9 minutes, and the fastest unit average power-off time was only 2 minutes.
4. Strengthen equipment operation management and reduce equipment failure rate. In view of the shortcomings of the previous operation and management of distribution network, strengthen the construction of the distribution network operation management standard system, formulate the system and standards such as the "Technical Standards for Medium and Low Voltage Distribution Equipment", consolidate the management foundation, strengthen technical supervision, and establish a rapid re-powering mechanism.
In XX, the 10 kV feeder failed to trip 982 times, a decrease of 375 times, a decrease of 27.6%. As the equipment failure rate decreased, the power failure time of the distribution network was 1.82 hours/household, which was 1.33 hours/year.
Technical measures
1. Optimize the technical principle of feeder reclosing and improve the timely recovery rate of feeder faults. The principle of optimized reclosing technology, including all hybrid lines and all cable lines, is put into reclosing. In the whole year, 4070 feeder trips were realized in 10kv, and re-closing was successful in 3095 times. The time-to-recovery rate after failure was 76.04%, an increase of 11.88 percentage points year-on-year, and the average power outage time of users was reduced by 0.67 hours/household.
2. Carry out 10kv equipment condition monitoring and status maintenance to reduce the impact of power failure test on power supply reliability. From June 1st, XX, the state monitoring and condition maintenance of the substation 10kv equipment were carried out to reduce the impact of the periodic preventive test power failure on the reliability of the 10kv equipment in the station. The main network was scheduled, scheduled, and repaired. The power outage time was reduced by 2.58 hours/household, and the number of power outages decreased by 58.2%.
3. Fully promote the work of live working with distribution network. Carry out five routine operations such as fire connection, fire removal, replacement of fault indicators, handling of wire strands and floating objects, and powered poles to reduce the time for project access to power outages. It was fully implemented in the two pilot areas of Tianhe and Panyu. In XX years, 114 live elective operations have been completed, reducing the average power outage time of users in the pilot areas by 0.22 hours/household. XX years will be promoted globally.
4. Comprehensively carry out automation construction of distribution network. Distribution network automation is not only one of the important measures to improve reliability, but also the only way to establish a world-class advanced power supply bureau. In XX, the first batch of implementation projects entered the comprehensive construction stage, and 1349 electric house construction was completed during the year, and the coverage rate in the pilot area reached 20%. Realizing distribution network automation will improve the real-time monitoring capability of the distribution network operation, realize fast and accurate fault location and isolation, and quickly re-power. The project construction was completed in three years, and the coverage rate in Guangzhou in XX years reached over 90%. It is estimated that the average power outage time of urban users will be reduced to less than one hour, which is 73% lower than that of XX, which effectively improves the reliability of power supply for users.
5. Implement remote control technology for relay protection equipment. Completed the “Research on Remote Control of Relay Protection Equipment” technology project, realizing the remote control of feeder reclosing, self-injection and low-cycle load shedding. Under the condition that the Guangzhou area does not satisfy n-1, it is exhausted. It is possible to access the automatic device to create conditions. 35 110kv stations have been reconstructed in the urban area, with remote remote control conditions, accounting for 41% of the total number of 110kv substations in the urban area, accounting for 21% of the total.
Management, assessment system construction and information technology support
1. Construction of management and assessment system. Formulate the "Power Supply Reliability Management Regulations" and "Power Supply Reliability Assessment Program" to incorporate power supply reliability into performance management. Form institutional guarantees, so that the improvement measures and indicators control work will be put in place.
2. Use information technology support means. The statistical analysis system for establishing indicators based on the integrated platform of gis and battalion has been completed, and the power outage data is obtained directly from the dispatch record and the emergency repair record, the index is calculated, and the reliability rate of the blackout plan can be predicted. At the same time, through the association with the marketing system data, it has the function of counting the basic indicators of natural users in accordance with international practice. Through information means, the purpose of reducing statistical work intensity and improving efficiency is realized, and more importantly, the accuracy of indicator statistics is guaranteed.
In summary, the work of improving the reliability of power supply has been highly valued as never before, especially the high level of attention of the leaders of the Guangzhou Bureau, which has become an important factor that must be considered in all work. A responsibility transfer mechanism has been established to integrate power supply reliability indicators into performance appraisal indicators management. Monthly power supply reliability indicators were issued at the office meeting and distribution network operation analysis meeting to promote effective implementation of various measures to improve power supply reliability. Taking the improvement of power supply reliability as the overall grasp of the work, it has effectively promoted the management work and technological innovation of various professions, and has made important breakthroughs in many tasks such as live working, distribution network automation, and joint-loop power transmission.
Third, the power supply bureau to carry out the experience of pioneering work
1. Fully understand the essence of work is to improve management standards. If you leave this essence to do it, you will encounter many difficulties and contradictions. For example, to make power supply reliability, it is necessary to build a power grid. If the power grid is built, it will cause power outages; for example, live working will encounter security problems, and safety supervisors will have veto power over security issues. If you really want to improve the management level, I believe that all kinds of problems will find a very good balance point, otherwise you may suffer some interference and lose the original direction.
2, everything is pre-established, not pre-emptive. The premise of carrying out the work is to find out the family, find the correct measures, determine the target, and then move. According to the experience of the Biotechnology Department of the Power Supply Bureau, as a functional department, no matter what you do, the most lazy thing is thinking and planning. Many departments reflect that work is often interfered by the outside world. The same is true of the previous Bureau of Technology. However, it has not been affected in the past three years. Why can it be done? First, emphasize that planning, technology, and work must be planned. Not only do you want to think about this year's affairs, but also plan for five years, including technical reforms and communications. Without planning, there is no long-term. Second, basically think of the problems that the superiors think of, so that the work will not be affected. With the promotion of the superiors, the level of departmental work has also increased, and it has become thrust and boost, rather than becoming resistance.
3. The key to promoting work is to widely publicize and start a good game, select a typical target tree, and gain confidence in the short-term. A relatively large-scale work with certain challenges and breakthroughs in traditional habitual work must not only see the overall goal, but also see the effect in a short period of time. Let everyone see that it is feasible to do such a work. It is possible to speed up the building of everyone's confidence. Otherwise, it will be easy to spurt and then decline.
4. Give full play to teamwork. As an innovative team, we must be liberated, and with an open mind, the team will be energized. To this end, the Department of Biotechnology of the Power Supply Bureau proposed two slogans, one is "Wisdom + Sweat", and the other is that everyone grows together and grows together. Teams must have a consensus, they must listen to different opinions, and must not be the first.
5. The basis for the implementation of the measures is the institutionalization and dailyization of the measures. The statistics of the indicators are true and accurate, avoiding two skins. The basis for this work is that the work measures should be routine. It is not that the workers have to make a separate system, record, and statistics for the reliability of power supply. If this is the case, this work does not have long-term nature. So all the measures must be integrated into the daily work plans, standards and programs.
First, find out the family, analyze the reasons, and make overall plans.
My power supply bureau conducted a systematic analysis of the factors affecting the reliability of power supply. In the first half of XX, the bureau spent more than five months to classify and calculate the data of XX years, and found out the main factors affecting the indicators. Through the statistics of the whole year of XX, the impact of various factors on reliability was clarified. size.
After analysis, the main factors affecting the reliability of power supply are weak grid and inadequate management.
1. Pre-arranged power outages are the most important factor, accounting for 82.5% of the total, of which: 70% of planned power outages and 12.5% of temporary power outages;
2. The main network factor accounts for 36.9%, mainly due to pre-test, scheduled school and maintenance power failure;
3, distribution network factors accounted for 49.1%, engineering accounted for 20.5%, the largest proportion;
4, fault power outage accounted for 15.5%, of which 10 kV medium voltage distribution network failure accounted for 14.2%, is an important reason affecting reliability;
5, the user industry expansion project access and other reasons for power outages also accounted for a certain proportion, reaching 12%.
To this end, on the basis of analyzing and clarifying the situation, the SIPO adopted the overall consideration of nearly two months, solicited opinions from many parties, clarified the working ideas for improving the reliability of power supply, formed a global work plan, and formulated targets for each stage. A five-year work plan to improve the reliability of power supply, pointing out a clear strategic direction for future initiatives.
Second, the main measures and effects adopted in XX year are the implementation of the five-year plan's phased objectives, highlighting the work priorities of different stages, and promoting various work. The Bureau has issued a series of specific measures and measures. The focus of the work is mainly on the implementation of four management measures and five technical measures, among which there are many innovative measures. At the same time, it is proposed to establish an indicator statistical analysis system based on the distribution network gis and the battalion integration platform, reduce the statistical work intensity, and ensure the accuracy of the information to provide information support means. Through the management system, the closed-loop management of “pre-event evaluation, in-process control inspection, and post-mortem statistical analysis” is realized.
Management measures
1. Comprehensively strengthen the transfer of power supply management. The reversal of power supply is currently the most important measure to improve the reliability of power supply. In XX years, the total number of power transmissions in urban areas was 1,219, accounting for 97.4% of the total number of rotations. The average power outage time of users was reduced by 3.42 hours per household, which was equivalent to an increase of 0.039 percentage points in power supply reliability and a significant increase of 33.7% year-on-year. A total of 945 power transmission plans were made for complex and important power transmission. Even if only one user can turn around in the power outage plan, power conversion is required. At the same time, the research, calculation and experiment of the joint-turn technology, and the introduction of technical principles and related management systems.
2. Strengthen the management of integrated power outages. Every month, the dispatch center will arrange the power outage plan, integrate the main, distribution network, engineering and maintenance, and user engineering, and arrange the power outage reasonably to avoid repeated power outages. In the case of a significant increase of 29.7% year-on-year in various types of engineering investment, the pre-arranged power outage decreased by 14.1% compared with the same period, reducing the user's power outage time by 1.52 hours/household. Some district bureaus organize hundreds of people to work at the same time, and multiple power outages are carried out at the same time, reducing the time and number of power outages.
3, refined management, optimize the workflow, reduce the power outage process time. Develop power supply reliability process indicators, optimize refinement process management, and reduce user power outage time in detail. A power-off and power-off operation task arranged two groups of people, compressing the power-off time, the average power-off time was reduced from the original 40 minutes/time to less than 9 minutes, and the fastest unit average power-off time was only 2 minutes.
4. Strengthen equipment operation management and reduce equipment failure rate. In view of the shortcomings of the previous operation and management of distribution network, strengthen the construction of the distribution network operation management standard system, formulate the system and standards such as the "Technical Standards for Medium and Low Voltage Distribution Equipment", consolidate the management foundation, strengthen technical supervision, and establish a rapid re-powering mechanism.
In XX, the 10 kV feeder failed to trip 982 times, a decrease of 375 times, a decrease of 27.6%. As the equipment failure rate decreased, the power failure time of the distribution network was 1.82 hours/household, which was 1.33 hours/year.
Technical measures
1. Optimize the technical principle of feeder reclosing and improve the timely recovery rate of feeder faults. The principle of optimized reclosing technology, including all hybrid lines and all cable lines, is put into reclosing. In the whole year, 4070 feeder trips were realized in 10kv, and re-closing was successful in 3095 times. The time-to-recovery rate after failure was 76.04%, an increase of 11.88 percentage points year-on-year, and the average power outage time of users was reduced by 0.67 hours/household.
2. Carry out 10kv equipment condition monitoring and status maintenance to reduce the impact of power failure test on power supply reliability. From June 1st, XX, the state monitoring and condition maintenance of the substation 10kv equipment were carried out to reduce the impact of the periodic preventive test power failure on the reliability of the 10kv equipment in the station. The main network was scheduled, scheduled, and repaired. The power outage time was reduced by 2.58 hours/household, and the number of power outages decreased by 58.2%.
3. Fully promote the work of live working with distribution network. Carry out five routine operations such as fire connection, fire removal, replacement of fault indicators, handling of wire strands and floating objects, and powered poles to reduce the time for project access to power outages. It was fully implemented in the two pilot areas of Tianhe and Panyu. In XX years, 114 live elective operations have been completed, reducing the average power outage time of users in the pilot areas by 0.22 hours/household. XX years will be promoted globally.
4. Comprehensively carry out automation construction of distribution network. Distribution network automation is not only one of the important measures to improve reliability, but also the only way to establish a world-class advanced power supply bureau. In XX, the first batch of implementation projects entered the comprehensive construction stage, and 1349 electric house construction was completed during the year, and the coverage rate in the pilot area reached 20%. Realizing distribution network automation will improve the real-time monitoring capability of the distribution network operation, realize fast and accurate fault location and isolation, and quickly re-power. The project construction was completed in three years, and the coverage rate in Guangzhou in XX years reached over 90%. It is estimated that the average power outage time of urban users will be reduced to less than one hour, which is 73% lower than that of XX, which effectively improves the reliability of power supply for users.
5. Implement remote control technology for relay protection equipment. Completed the “Research on Remote Control of Relay Protection Equipment” technology project, realizing the remote control of feeder reclosing, self-injection and low-cycle load shedding. Under the condition that the Guangzhou area does not satisfy n-1, it is exhausted. It is possible to access the automatic device to create conditions. 35 110kv stations have been reconstructed in the urban area, with remote remote control conditions, accounting for 41% of the total number of 110kv substations in the urban area, accounting for 21% of the total.
Management, assessment system construction and information technology support
1. Construction of management and assessment system. Formulate the "Power Supply Reliability Management Regulations" and "Power Supply Reliability Assessment Program" to incorporate power supply reliability into performance management. Form institutional guarantees, so that the improvement measures and indicators control work will be put in place.
2. Use information technology support means. The statistical analysis system for establishing indicators based on the integrated platform of gis and battalion has been completed, and the power outage data is obtained directly from the dispatch record and the emergency repair record, the index is calculated, and the reliability rate of the blackout plan can be predicted. At the same time, through the association with the marketing system data, it has the function of counting the basic indicators of natural users in accordance with international practice. Through information means, the purpose of reducing statistical work intensity and improving efficiency is realized, and more importantly, the accuracy of indicator statistics is guaranteed.
In summary, the work of improving the reliability of power supply has been highly valued as never before, especially the high level of attention of the leaders of the Guangzhou Bureau, which has become an important factor that must be considered in all work. A responsibility transfer mechanism has been established to integrate power supply reliability indicators into performance appraisal indicators management. Monthly power supply reliability indicators were issued at the office meeting and distribution network operation analysis meeting to promote effective implementation of various measures to improve power supply reliability. Taking the improvement of power supply reliability as the overall grasp of the work, it has effectively promoted the management work and technological innovation of various professions, and has made important breakthroughs in many tasks such as live working, distribution network automation, and joint-loop power transmission.
Third, the power supply bureau to carry out the experience of pioneering work
1. Fully understand the essence of work is to improve management standards. If you leave this essence to do it, you will encounter many difficulties and contradictions. For example, to make power supply reliability, it is necessary to build a power grid. If the power grid is built, it will cause power outages; for example, live working will encounter security problems, and safety supervisors will have veto power over security issues. If you really want to improve the management level, I believe that all kinds of problems will find a very good balance point, otherwise you may suffer some interference and lose the original direction.
2, everything is pre-established, not pre-emptive. The premise of carrying out the work is to find out the family, find the correct measures, determine the target, and then move. According to the experience of the Biotechnology Department of the Power Supply Bureau, as a functional department, no matter what you do, the most lazy thing is thinking and planning. Many departments reflect that work is often interfered by the outside world. The same is true of the previous Bureau of Technology. However, it has not been affected in the past three years. Why can it be done? First, emphasize that planning, technology, and work must be planned. Not only do you want to think about this year's affairs, but also plan for five years, including technical reforms and communications. Without planning, there is no long-term. Second, basically think of the problems that the superiors think of, so that the work will not be affected. With the promotion of the superiors, the level of departmental work has also increased, and it has become thrust and boost, rather than becoming resistance.
3. The key to promoting work is to widely publicize and start a good game, select a typical target tree, and gain confidence in the short-term. A relatively large-scale work with certain challenges and breakthroughs in traditional habitual work must not only see the overall goal, but also see the effect in a short period of time. Let everyone see that it is feasible to do such a work. It is possible to speed up the building of everyone's confidence. Otherwise, it will be easy to spurt and then decline.
4. Give full play to teamwork. As an innovative team, we must be liberated, and with an open mind, the team will be energized. To this end, the Department of Biotechnology of the Power Supply Bureau proposed two slogans, one is "Wisdom + Sweat", and the other is that everyone grows together and grows together. Teams must have a consensus, they must listen to different opinions, and must not be the first.
5. The basis for the implementation of the measures is the institutionalization and dailyization of the measures. The statistics of the indicators are true and accurate, avoiding two skins. The basis for this work is that the work measures should be routine. It is not that the workers have to make a separate system, record, and statistics for the reliability of power supply. If this is the case, this work does not have long-term nature. So all the measures must be integrated into the daily work plans, standards and programs.
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