Water turbine starting process vibration suppression method based on MOPSO and stability test

Abstract

The invention discloses a water turbine starting process vibration suppression method based on MOPSO and a stability test. The water turbine starting process vibration suppression method comprises the following steps that S1, a starting model of a mixed-flow unit is established; s2, obtaining an objective function and a decision variable of startup rule optimization; s3, optimizing the startup rule by using an optimization method to obtain a Pareto optimal frontier; s4, selecting a plurality of groups of solutions in the Pareto frontier to carry out field tests in the power station, and obtaining the vibration condition of the hydraulic machinery; and S5, establishing a comprehensive state evaluation system, and determining a final optimal solution. According to the method, a regulating system simulation model of the hydroelectric generating set is established, the set rotating speed overshoot and the set rotating speed rise time are taken as targets, a multi-target particle swarm algorithm is utilized to optimize a starting rule, a Pareto optimal leading edge is obtained, a final optimal solution is selected in combination with field tests and expert experience, and the optimal solution is obtained. The final optimal solution can reasonably avoid mechanical vibration in the starting process of the unit, unit loss is reduced, and the service life of the unit is prolonged.

Description

Technical field [0001] The present invention relates to the field of hydroelectric power generation technology, in particular a method of vibration suppression based on MOPSO and stability test of water turbine start-up process. Background [0002] In the context of diversified integrated power grids, it is crucial to ensure the stability of high penetration renewable energy power systems, and hydropower units have high efficiency and flexibility, can provide inertia for the grid, and are an indispensable part of maintaining the stability of the grid. At present, the research on the optimization of hydropower unit rules at home and abroad mainly focuses on the optimization of unit operation and load distribution, but there is less research on the transition process of the start-up stage of the unit. The start-up stage can be defined as the process from the unit to receive the start-up instruction until the grid connection, the current start-up law of the turbine governor usually ...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that hydraulic and mechanical vibration factors are not considered in the start-up process of the hydraulic turbine in the prior art, and proposes a vibration suppression method during the start-up process of the hydraulic turbine based on MOPSO and stability tests. The present invention establishes a regulation system simulation model of the hydroelectric unit, Taking the unit speed ove

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