In one day, the peak-valley difference of East China Power Grid reaches about 30%, that is to say, if the maximum power load of East China Power Grid reaches more than 50 million kilowatts, its minimum power load is only about 35 million kilowatts, and the load of 6,543.8+0.8 million kilowatts needs to be reduced, otherwise the power grid will be unbalanced between supply and demand. Due to the imbalance between supply and demand of power grid, the frequency is seriously reduced. Caused a large-scale power outage.
Based on the above reasons, the working meeting atmosphere of Tianhuangping Pumped Storage Power Station from 8: 00 to 8: 30 every morning is becoming more and more severe. Therefore, management must be a closed loop. Tianhuangping, which was officially started on 1 March, 9941,was built in the era of total power shortage. Because the ratio of electricity consumption to power generation is 4: 3, that is, "generating 3 kWh with 4 kWh", it has caused quite a controversy in the construction site. However, by the time it was officially completed in June 5438+February 2000, the benefits of East China Power Grid dispatching had been fully realized. The main motive of building Tianhuangping Pumped Storage Power Station is to regulate East China Power Grid: at the peak of power consumption, the reservoir at the top of the hydropower station releases water, and the water falls into the reservoir at the foot of the mountain from a height, generating potential energy to supplement the needs of East China Power Grid. When the electricity consumption drops, in order to maintain the balance between supply and demand of the power grid, it is necessary to reduce the load and adjust the peak-valley difference of the power grid. Because the thermal power generation accounts for 92% of the total power generation in East China Power Grid, if the thermal power units operating at full capacity stop or reduce production during the peak period, the coal consumption and start-stop loss will be too great. Thus, the role of Tianhuangping Hydropower Station appeared-it can pump the water from the reservoir below the mountain back to the reservoir at the top of the mountain, thus consuming excess electricity.
In addition, due to the fast start-up speed of hydropower units (it can run at full capacity in 2 minutes), after the separation of power plants and power grids, Tianhuangping, as one of the few hydropower stations left by East China Power Grid Corporation, actually assumed the responsibility of emergency standby. Therefore, Tianhuangping Hydropower Station can be put into use immediately, including frequency modulation and phase modulation of the power grid, once the generator set of the thermal power plant in East China Power Grid has an accident or long-distance transmission failure.
Since July 2003, due to the power shortage in East China, six 300,000-kilowatt units in Tianhuangping have been running at full capacity, and each unit has to pump water twice a day and generate electricity three times. At about 7 am, people started to work, and the electricity consumption gradually reached the peak. There was a shutdown at noon, because it was a lunch break, and the electricity consumption decreased. Power generation lasts from the afternoon until about five o'clock. At this time, people were just about to get off work, and the electricity consumption dropped again, so they stopped and began to pump water. At 7 o'clock, residents returned home one after another to turn on the TV air conditioner, and the peak of electricity consumption came again. The reservoir discharged water to generate electricity until about 12 o'clock in the evening, and the electricity consumption entered the lowest point of the day. Tianhuangping Hydropower Station did not stop pumping until 7 o'clock the next day.
Such frequent repeated start-up and stop can be imagined for the strict requirements of equipment maintenance and repair in power plants. At this time, safety in production has become a top priority for Feng and his colleagues, and most of what they discuss at the regular meeting every morning is this. Turn over the equipment and management defects that occurred the day before. Feng called their management method "defect management". At the morning meeting, at least 5 to 10 important defects were put forward from the problems that appeared on the first day for discussion and solutions were proposed. The so-called closed-loop management means that when a problem occurs, it can only be regarded as complete merit if it is effectively solved. The purpose of closed-loop management is to absolutely avoid the occurrence of a fault, avoid the occurrence of mutual shirking when solving problems, and eliminate the hidden dangers of accidents to the maximum extent.
Closed-loop management is based on the MRO Enterprise Asset Management System (EAM) adopted by Tianhuangping Hydropower Station: the power station generates electricity, and the power is carried by power equipment. It is conceivable that in the power industry, even the description of inventory is aimed at the equipment in the power industry and is an enterprise asset. As an asset-intensive enterprise, most of its assets are fixed special equipment, which is difficult to be changed or used in other places only by updating. For all equipment of hydropower stations, different manufacturers and brands, including coding methods, operating habits are different. In the past, each major had its own maintenance methods and processes, which actually formed an "information island". Inventory can't be distributed uniformly, and equipment maintenance depends on everyone's experience and handwritten work orders, and omissions and errors occur from time to time. The unstable curve of equipment is called "bathtub curve", which is a high-risk section in the early and late application. If the maintenance records of the equipment are not properly kept, it is almost impossible for his successor to know the overall situation and past history of the equipment when the maintenance personnel are transferred, and it is difficult to inherit the maintenance experience and safety experience, and the mistakes made are often repetitive.
As a management system, EAM basically solves a series of problems such as maintenance, inventory, tool management and equipment management: these modules run on a unified platform, and all the codes of machines and parts are entered into the database. Prior to this, all the maintenance work and safety measures of all equipment were sorted out, turned into standard processes, incorporated into the database, and made into standard toolkits. Toolkit has strict restrictions on standard processes and key quality and safety checkpoints. The experience generated in the process of equipment failure and maintenance should also be recorded in the work package in a standardized form, which can be used as a useful supplement for inheritance and learning. Equipment maintenance records are complete and standardized. When the data is accumulated to a certain extent, the system will have a basic judgment on the minimum inventory of spare parts, and once the inventory is below the standard, it will automatically generate a purchase warning. Because procurement becomes transparent, the minimum inventory can also greatly reduce the capital occupancy rate. Therefore, during the peak period, all power plants will run at full load or even overload. At that time, perhaps the application of standardized management and systems will enable the power plant to maximize its potential.