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[en] The building of easily controlled production subassemblies is one of the urgent problems encountered in the development of heating systems for modern power plants. This paper describes a process by which a control system is built with subassemblies for the feed of basic condensate and steam to a deaerator by combined efforts of engineering and automation experts
[en] Use of nonlinear dynamic analysis with application of concrete-strain diagrams has permitted more adequate evaluation of the stress-strain state of a structure subject to seismic effects
[en] The relationship between the temperature of conductors in high-voltage lines (HVL) subject to solar radiation with no wind and their diameter is derived, an algorithm is presented for calculation of the limiting allowable heating temperature of conductors in the active HVL on the conditions that standard conductor-to-ground and conductor-to intersecting entity clearance is maintained, an equation is given for calculation of the limiting allowable current load on HVLwith allowance for their heating by solar radiation, and results of the calculations are presented
[en] The experience of creating software and algorithms for automatic process control at the Mutnovskaya geothermal power plant (GTPP) on the basis of the Teleperm ME automation system is presented. The heat cycle and special features of the heat flow diagram of the power plant are briefly described. The engineering solutions used, the structure of the system, and the principles of process control at the Mutnovskaya GTPP are considered. Special attention is devoted to the turbine regulator that consists of several regulating units because of the great number of problems solved by control valves; each regulating unit solves control problems depending on the mode of operation of the power generating set
[en] It is shown that the method for testing power cables for the absence of ignition presented in Circular Ts-02-98 does not allow for the effect of thermal decline of the current, which leads to overestimation of the cross section of the chosen cables, especially in 0.4-kV networks. It is recommended to equip house cable networks of power objects with long-range backup protections
[en] The monitoring and control systems at the 500 MW coal-dust power generating units No. 7, 8, and 9 at the Reftinskaya GRES 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
[en] Changes during operation in the state of the segment where concrete reinforcement of the water channels of the Votkinsk hydroelectric plant join the Kama River are examined. The reasons for erosion during the 1990’s, including lowering of the water levels in the lower millrace, are examined. It is noted that after reinforcement of the hopper during 1998 – 2000, the state of this segment remains satisfactory and does not threaten the safety of the equipment.
[en] Problems and potential approaches to determining ice characteristics for sea hydroengineering structures design are considered. A system for numerical modeling of ice dynamics is presented. The system may be used to define ice characteristics on approaches to structures with due regard for local hydrometeorological conditions and ice loads on structures. System application examples are presented for determining computational scenarios for ice loads at structures of the Pevek floating nuclear power plant (FNPP), as well as for the breakwater pier under reconstruction in Vanino. A scenario approach is used to determined ice loads
[en] It is shown that the temperature of makeup water in district heating systems has a strong effect on the energy efficiency of turbines of thermal power plants. A low-temperature deaeration process that considerably improves the energy efficiency of thermal power plants is developed. The desorbing agent is the gas supplied to the burners of the boiler. The energy efficiency of the process for a typical unit of thermal power plant is assessed.
[en] A mathematical description of a closed control system with allowance for pressure fluctuations in the head system, which makes it possible to analyze the regime stability of orthogonal generating sets at tidal electric power plants when operating in the complete range of heads, outputs, and rotational speeds, and to select parameters of the control system, is obtained for an orthogonal hydroturbine and a generator with a load regulator.