Redundant digital electric-hydraulic control system for turbine

Abstract

The invention discloses a redundant digital electric-hydraulic control system for a turbine, comprising a dual power switching device, a control unit and a man-machine interface, wherein, the control unit comprises a controller A, a controller B, a signal acquisition module group A, a signal acquisition module group B, a dual machine switching module and a plurality of communication modules; the controller A carries out signal interaction with a turboset and a servo system through the signal acquisition module group A; the controller B carries out signal interaction with the turboset and the servo system through the signal acquisition module group B; the controller A is connected with the controller B, and the controller A and the controller B respectively carry out information interaction with the man-machine interface through the communication modules; and the signal of the controller A and the controller B is connected to the dual machine switching module and the controller A and the controller B carry out information interaction with the man-machine interface through the communication modules. The redundant digital electric-hydraulic control system realizes the triplex redundancy design of the control unit, a power supply unit and the man-machine interface of the digital electric-hydraulic control system for the turbine, greatly prevents threat on normal operation of the turboset caused by faults of the control system, and ensures safe and reliable operation of the turboset under various working conditions.

Description

technical field [0001] The invention relates to a control system of a steam turbine, in particular to a redundant digital electro-hydraulic control system of a steam turbine. Background technique [0002] The steam turbine digital electro-hydraulic control system is composed of the electronic control system part and the hydraulic regulation safety system part. The main task of the steam turbine digital electro-hydraulic control system is to adjust the speed and power of the steam turbine generator set to meet the requirements of the power grid. The use of digital electro-hydraulic control can improve the control accuracy of high and medium voltage valves. In order to achieve CCS coordinated control and improve The control level of the entire steam turbine unit provides a basic guarantee, which is more conducive to the operation of the steam turbine. In terms of reliability design of the steam turbine digital electro-hydraulic control system in the prior art, most of the met...

AI Technical Summary

Problems solved by technology

In terms of reliability design of the steam turbine digital electro-hydraulic control system in the prior art, most of the methods are to adopt redundant design for important signals or circuits, but the redundancy is not considered for the signal receiving unit and signal comprehensive processing link, and the control system itself Once a failure occurs, it will pose a threat to the normal operation of the steam turbine unit, and it is difficult to ensure the safe and reliable operation of the steam turbine unit under various working conditions

At the same time, in the prior art, two power supplies are used to realize redundant power supply. If one power supply fails, it will be switched to the other immediately. However, there are problems such as long switching time and interference with electrical equipment during the switching process.

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