A Calculation Method of Natural Torsional Vibration Frequency of Half-speed Nuclear Power Unit

Abstract

The invention is a method for calculating the natural torsional vibration frequency of a half-speed nuclear power unit. It includes the following steps: 1) Obtain the moment of inertia of the concentrated mass of the half-speed nuclear power unit and the stiffness coefficient between the mass blocks; 2) Establish the moment of inertia matrix and stiffness coefficient matrix of the above half-speed nuclear power unit; 3) Calculate the half-speed nuclear power unit The state space matrix of the rotation state equation of the unit; 4) Determine the eigenvalues ​​of the state space matrix through the eigenvalue calculation method. The present invention designs a new eigenvalue application algorithm, which is based on the moment of inertia matrix of the half-speed nuclear power unit and the stiffness coefficient matrix between the mass blocks of the unit, uses the rotation state equation, and uses parameter per unitization to unify the electrical System and mechanical system interface models. The invention is applicable to the calculation of the natural torsional vibration frequency of half-speed nuclear power units, has a high degree of integration with actual engineering, and can be applied to the subsynchronous oscillation analysis of such nuclear power units.

Description

technical field [0001] The invention is a method for calculating the natural torsional vibration frequency of a half-speed nuclear power unit, which belongs to the transformation technology of the calculation method for the natural torsional vibration frequency of a half-speed nuclear power unit. Background technique [0002] Vigorously developing nuclear power is the latest direction of my country's energy policy development. According to the medium and long-term development plan of nuclear power approved by the State Council in 2007, by 2020, the operating installed capacity of nuclear power will reach 4.0×107kW, accounting for 4% of the total installed capacity of electric power. The total installed capacity of nuclear power units currently in operation in my country is 9.068×106kW, accounting for only 1.1% of the total installed capacity of electric power in my country. This means that in the past 10 years, about 30 nuclear power units above 1 million kilowatts will be ...

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Problems solved by technology

[0009] (3) The size and weight of half-speed steam turbines are large, and the installation, manufacturing and transportation costs of steam turbines are higher than those of full-speed steam turbines

[0011] The application of eigenvalue algorithm to the study of unit subsynchronous oscillation is a mature technology, but the research and analysis method for half-speed nuclear power units is relatively rare

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