Reconstruction of the Front End Gland of the Intermediate-Pressure Cylinder of the K-300-240 Turbine at the Konakovskaya GRÉS Using Mathematical Modeling

In order to raise the reliability of operation of the system of end glands of K-300-240 turbines at the Konakovo State Regional Power Plant (Konakovskaya GRÉS), the system for feeding steam to the end glands of high-pressure and intermediate-pressure cylinders has been updated. The updating included reconstruction of chimneys at the suggestion of the Komtek-Énergoservis Co. and feeding of cooling steam to the zone of the third compartment of the front end gland of the intermediate-pressure cylinder. The measures taken increased the reliability of operation of the system of turbine glands, eliminated oil watering due to steaming, and reduced the temperature deformations of chimney gland yokes.     

Automatic system for regulating the frequency and power of the 500 MW coal-dust power generating units at the Reftinskaya GRÉS

The monitoring and control systems at the 500 MW coal-dust power generating units No. 7, 8, and 9 at the Reftinskaya GRéS have been modernized using information-regulator systems. Layouts for instrumental construction of these systems and expanded algorithmic schemes for the automatic frequency and power control system and for the boiler supply and fuelling are discussed. Results from tests and normal operation of the automatic frequency and power control system are presented. Translated from élektricheskie Stantsii, February 2009, No. 2, pp. 47–53.     

Selection of substitute fuel for the boilers in the 500 MW units of the Reftinskaya GRÉS

This is an analysis of computational and analytical studies of the suitability of a wide range of Russian coals, and of industrial-scale combustion tests of several Kuznetsk coals, including a mixture of Krasnobrodskii and ékibastuz coals in a 1:1 proportion, for use in the 500 MWunits of the Reftinskaya GRéS (State regional electric power plant), where ékibastuz coal is traditionally used.     

Adapting the monitoring and control systems on the 300 MW power generation units at the Iriklinskaya GRÉS to modern operational requirements

Work done by JSC “Interavtomatika” and the Iriklinskaya GRéS (State Regional Electric Power Plant) to create automatic frequency and power control systems is reported. This involved reconstructing the turbine regulator systems and modernizing all the regulators for the power generator unit (those coupled to and those not coupled to the automatic frequency and power control systems) and the automatic burner control systems on the basis of a unified Simatic PCS7 PS controller system for the four 300 MW power generation units at the Iriklinskaya GRéS.     

Improvement of the thermal expansions and vibration reliability in the pgrading of the K-330-240 turbo units of the kashira state regional power plant (GRÉS)

Methods of normalizing the thermal expansions that occur in turbo units of different powers are considered. A modern solution for the assembly of sleeve joints using a hydraulic instrument to increase the vibration reliability is proposed. The measures described for repairing turbo units enable the amount of effort and time of subsequent capital repairs to be reduced considerably for relatively low initial costs.     

Status of water-development works at the sayano-shushenskaya hpp during operation in the winter of 2009 – 2010

The status of water-development works at the Sayano-Shushenskaya HPP during operation in the winter of 2009 – 2010 is described.     

Optimization of the water chemistry of the primary coolant at nuclear power plants with VVÉR

Results of the use of automatic hydrogen-content meter for controlling the parameter of hydrogen in the primary coolant circuit of the Kola nuclear power plant are presented. It is shown that the correlation between the hydrogen parameter in the coolant and the hydrazine parameter in the makeup water can be used for controlling the water chemistry of the primary coolant system, which should make it possible to optimize the water chemistry at different power levelsTranslated from Élektricheskie Stantsii, No. 12, December 2004, pp. 31 – 33.     

Optimized operation of cascade reservoirs on Wujiang River during 2009–2010 drought in southwest China

The effects of optimized operation principles implemented at reservoirs on the Wujiang River in southwest China between September 2009 and April 2010 under drought conditions were analyzed based on operational data collected from the Guizhou Wujiang Hydropower Development Co., Ltd. A set of linear regression equations was developed to identify the key factors impacting the electric power generation at reservoirs. A 59% reduction in the inflow discharge at the Hongjiadu Reservoir led to a decrease of only 38% in the total electric power generation at the Hongjiadu, Dongfeng, Suofengying, and Wujiangdu reservoirs on the Wujiang River, indicating that optimized operation can play an important role in drought management. The water level and the amount of other water inputs at the Hongjiadu Reservoir and the outflow discharge at all of the reservoirs except the Wujiangdu Reservoir were key factors affecting the total electric power generation at reservoirs on the Wujiang River under optimized operation.     

State of the “dam-foundation” system during operation of the outlet of the chirkey hydroelectric station

Conclusions  

Retrospective Analysis of the Results of Geophysical Monitoring of the Foundation of the Sayano-Shushenskaya HPP in 2011 – 2019

Power Technology and Engineering - The variation of the velocity of P-waves in the base and abutments of the dam and in the foundation of the powerhouse is analyzed. The zones of man-induced impact...