Steam Turbine Control Valve and Actuation System Modeling for Dynamics Analysis

Steam Turbine Steam System

Features of New Steam Turbine Control System

OVERVIEW: Along with advances in system component technologies, modern state-of-the-art power plant control systems are being developed by incorporating such advanced technologies as extensive digitization of high-speed control circuits, interconnection with other equipment over open interfaces, and a repertory of diverse multiplexed systems. Based on Hitachi Integrated Autonomic Control System...

Modeling and Simulation of Main Control Valve Mechanism of LNG Ship Steam Turbine

A mathematical model and simulation analysis on main control valve mechanism of LNG ship steam turbine are carried out. A reasonable modeling division of main control valve mechanism is achieved in accordance with the idea of modular modeling, and all the models are established respectively. The modeling division includes cam lifting mechanism, oil actuator and double-valve body. The state spac...

Modeling, Simulation and Control of Matrix Convert for Variable Speed Wind Turbine System

This paper presents modeling, simulation and control of matrix converter (MC) for variable speed wind turbine (VSWT) system including permanent magnet synchronous generator (PMSG). At a given wind velocity, the power available from a wind turbine is a function of its shaft speed. In order to track maximum power, the MC adjusts the PMSG shaft speed.The proposed control system allowing independen...

Numerical Analysis of Unsteady Loads on a Steam Turbine Double Seat Control Valve

The quest for the ever-greater operational flexibility of large-scale steam turbines continues to drive enhanced control valve design. Such components, subjected to large static loads, also may experience strong vibrations due to unsteady turbulent fluctuations downstream of the throttling section. Challenging design efforts are required to ensure that these fluctuations are confined far from s...