Two volumes of maintenance and regular maintenance of Guangdong Water Conservancy and Hydropower Turbine Generator Set in September 1st Pan Jianzhong Guangdong Feilaixia Water Conservancy Construction Bureau, Guangdong Qingyuan 5825 Preface Regular maintenance is the maintenance method adopted by most hydropower turbines. In recent years, with the widespread use of computer monitoring in hydropower stations and the continuous improvement of technology, some experts have proposed that the large-scale hydroelectric generating units installed in the future will no longer be regularly repaired. And the status check is implemented. To reduce unit downtime and improve utilization. Play more economic benefits. However, at present, the maintenance procedures for large-scale hydroelectric generating units formulated by China's hydropower industry do not provide for state maintenance. Manufacturers of hydroelectric generating sets have not made specific requirements. See from the development trend. Due to the maturity of the manufacturing technology of hydroelectric generating sets. Monitoring methods are becoming more and more perfect. The single-unit capacity is gradually and large, and the level of automation is constantly improving. Therefore, the conditions for implementing state maintenance are becoming more mature. 2 Condition maintenance needs to meet the set conditions. The so-called state maintenance of the hydro-generator unit is to use the computer monitoring expert system to comprehensively record the monitoring, analysis, analysis and prediction of the operation status and parameters of the hydro-generator unit. When it is found that the equipment is operating abnormally, make a reasonable scientific judgment or diagnosis. And provide reliable reports. As a safe and stable operation of the hydroelectric generating unit. To achieve state maintenance of the hydroelectric generating unit. The following conditions must be met: 1 The computer monitoring expert system must have high reliability and security, powerful enough functions and capacity, and cannot cause damage to the safe and stable operation of the unit due to errors in the relying computer monitoring system. First of all, the software required by the computer monitoring expert system is required to meet the following basic requirements at least. 3 The computer processes the acquired signal speed. The safety-seeking computer that can meet the crew accident situation 1 must have comprehensive judgment and analysis capabilities, and can correctly judge and analyze the collected signals. 6 The computer has self-learning self-diagnosis function, and there will be no false report or false negative phenomenon due to the passage of time and the accumulation of data. 2.2 All sensor elements of the computer must be very reliable and the data detected is true. Dualized automated sensing elements are required for important parts. Even if an automatic sensing component fails, the computer monitoring expert system can perform accurate judgment processing without affecting the safe operation of the unit. 23 The corresponding standards and specifications for state maintenance are to be established, and it is necessary to realize the state maintenance of the hydroelectric generating unit. Risk, because the planned overhaul has been carried out for many years. If the implementation of the state overhaul is not as expected, due to various factors, there may be many unintended consequences. Therefore, there must be a strict standard for computer monitoring expert systems. Practicality and operability should be strong, and it can provide guarantee for the safe operation of the hydropower station unit. Otherwise, the premise of the state inspection will lose the economic benefits. It is necessary to ensure the safety of the Anqi cut work. Many hydropower stations are currently unable to meet the requirements for state inspection maintenance. There is still a function of the computer monitoring system of the unit. The automation components are not very reliable, and the surface cooler design margin is insufficient for the bearing bearing oil leakage. If the manufacturer does not improve the progress. The maintenance and regular maintenance of the generator set are indispensable. Since the commissioning, the unit has carried out several temporary maintenance, and has carried out regular maintenance inspections in accordance with the unit maintenance manual provided by Austrian Yilin Company. 3 Advantages of regular maintenance At present, most of the regular maintenance systems implemented by hydropower stations are scientific and scientific. It is accumulated through a large number of unit operation data, and is carefully analyzed and summarized by experts and malfunctions according to unit operation. The time interval to determine the maintenance cycle. Generally speaking. The hydroelectric generating units should be arranged for maintenance during the dry season. Try to minimize the loss of power generation, the loss is the number of hours the unit can be used, as long as there is enough spare capacity for the grid. Part of the unit maintenance is completely ok. Moreover, the turbine generator set is overhauled in the dry season, and the unit faults and defects are well handled, which can fully ensure that the unit generates more power during the flood season. On the other hand, regular maintenance due to sufficient time schedules and various considerations is more comprehensive, and it is possible to deal with the defects of hydro-generator sets that are difficult to detect. For example, the degree of cavitation wear and the mechanical connection bolt breakage, the damage of the hydraulic structure of the flow channel, and the like. If these defects are not found during the flood season, they will be scheduled for maintenance. The power loss is quite large. Most of the hydropower stations in the wet season try to make the unit full of hair, and the small faults and defects are left to be treated during the regular maintenance of the dry season. Let the hydroelectric generating unit generate more electricity during the flood season. Less downtime, or no downtime, for greater economic efficiency. Regular maintenance also enables the maintenance management work to be carried out in a planned and targeted manner. The damage degree of the equipment to be repaired and replaced is often reversed. The functions of the following three aspects are controlled. 3.1 Control and regulation 3 units start and stop control according to the specified load The value is on. Stop. Or the operator can open and stop through the keyboard or mouse. Above control. The adjustment function is divided by the computer. For some important functions, the conventional manual operating system is reserved as the standby. 3.2 Operation status parameter monitoring The running status parameters of the whole station electromechanical equipment are automatically monitored by the microcomputer unit. Store and form various types of curve running log reports for display and automatic printing. The alarm is raised for the over-limit parameter. 3.3 Micro-computer protection All kinds of electrical protection of the whole station and the fault and accident protection of the water machine are realized by each microcomputer protection unit and are divided into main protection and backup protection settings. A corresponding audible signal will be emitted during protection actions or in the event of an accident. And the text alert window is automatically launched on the display screen. 3.4 The sequence of events records the operation of the main electromechanical equipment. protection. The accident fault status changes are recorded sequentially, with the time of day in the order of action. Minutes and seconds. The millisecond flag is used for errata and accident analysis, 3.5 data query and fault self-diagnosis for all operational data protection actions and accidents. The fault alarm information can be queried for 1 year. The control units of the system are important to each other and the communication between them. Jsiiiivriimnm.5,1.iYfftsftL 3.6 Other management and statistical functions Other management and statistical functions include system operation password management function; automatic statistics of the number of hours of operation of the main equipment. The number of accidents and failures, and establish equipment operation files; store relay protection settings; provide operational and operational guidance. 3.7 Communication and remote station level computers have a communication interface, which can communicate with superior scheduling or other computer systems to realize remote monitoring. So far, the stomach computer monitoring system has been applied to the Tunxi River in Chao'an County, hydropower station 2.2k, K Qingyuan City, Yinying City Yinlong Hydropower Station, 3 parents, 5000 research, 0 Xinxian County, Shuizhong 35 Substation, Dongguan City Canal Canal The village water pump station uses 185 research and other 0 power station substation pumping stations. Because its performance is very stable. Safe and reliable, high degree of automation, reduced staff and efficiency. Easy to operate. The wiring is simple, and the maintenance workload is greatly improved, which greatly improves the operating efficiency of the power station. Such as Xinxian County Shuizhong Substation. In 1998, the evaluation device was used for renovation. It was only put into operation until August 1999 due to the high degree of automation. Reduced the number of semi-operators. The poor management fee is 10,000 yuan; due to the quick installation. Reduce power outage time by 12 days. More than 360,000 yuan to increase the output value of 250,000 yuan; Jiaguao device quality is reliable. It is almost maintenance-free and overhauled. Compare with conventional equipment. Run for 9 months. Save 8 days of maintenance time, and send more than 24 to find. The production pit is 168,000 yuan. The grid computer monitoring device is less than 300,000 yuan. It is not necessary to recover the cost in half a year. The long-term benefits of a microcomputer-based monitoring system are considerable. 4 Prospects China's water resources are very rich. However, the overall level of development is still relatively low. Moreover, the hydropower stations that have been built, especially small hydropower stations, are still lagging behind in terms of technical equipment and operational management. The degree of automation is low and it is difficult to adapt to the requirements of safe and economical transportation of modern power systems. There is an urgent need for technological transformation to increase the level of automation. Technical renovation of new construction and old works. It is imperative to use the computer monitoring system for operation management. The Jaguar computer monitoring system device is compared with conventional equipment. It has advanced indicators that the overall indicators are advanced to the same type of equipment in foreign countries, and the unit structure is concise. The protection unit is ultra-compact, highly reliable, network standard, real-time, and flexible configuration of the main control computer. Friendly interface. Software modules are fully functional and so on. And the price is very low. Especially for small hydropower stations. Targeted. The equipment is simple. The operation and maintenance are convenient and the automation level is high. In the actual operation, it has high technological advancement and safety and reliability, which is very suitable for China's national conditions. Can be pre-made. In the next few years. The microcomputer monitoring system will be fully promoted and applied, and the modernization and economic benefits of small hydropower will also be greatly improved. It will have an important impact on China's economic development and scientific and technological progress. Responsible editor Zeng Weiyue is not easy to master on page 28, and regular maintenance can be handled in a targeted manner. 4 State maintenance and regular maintenance combined with the maintenance of the hydro-generator unit is to better play its economic benefits. The state inspection is to say that the maintenance is the purpose of the surrounding area for the purpose of the state maintenance of the hydroelectric generating unit. Just a theoretical discussion. There is still no standard. It is unrealistic to cancel regular maintenance. The conditions for the full implementation of state maintenance of large hydro-generator units nationwide are not fully available. There are various conditions for the implementation of state maintenance. At present, a considerable number of hydropower generating units of hydropower stations have been equipped with computer monitoring systems, but the operational reliability has not met the design requirements. Deadlocks and data loss situations can occur. No intelligent computer is used in the hydropower station to control the unit. However, the correct judgment and analysis of the operating status of the unit can only stay at a certain level. In particular, the sensing elements of the hydropower station units are not reliable and have poor environmental adaptability. The failure rate is high. Seriously affecting the safe operation of the unit, it is impossible to talk about the maintenance of these problems without first solving these problems. State maintenance and regular maintenance have an economical technology that is easier to implement than a large unit. Because the start and stop of a small unit has less impact on the grid than a large unit. The accident loss is relatively small; large units can be combined with state maintenance and regular maintenance, and the conditional hydropower plant will make the hydro-generators meet the requirements of the state due to the investment. Trial 1 state maintenance, when some fault factors can not be completely determined, it is still necessary to combine state maintenance with regular maintenance; however, it can reduce the number of regular inspections and extend the regular maintenance period. 5 Conclusion It is believed that with the continuous advancement of computer technology, the manufacturing technology of hydro-generator sets and auxiliary equipment is constantly improving. In particular, the improvement of automated component manufacturing technology. For the future maintenance and regular maintenance of hydro-generator sets and the development of corresponding standards and regulations to provide a more scientific basis for the Lilyin company Feilaixia unit maintenance manual responsible editor Zeng Weiyue
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