Control method and control device for power system and power system

Abstract

The invention provides a control method and device for a power system and the power system.The power system comprises a steam turbine and a compressor, the steam turbine is used for driving the compressor, the compressor comprises an air inlet guide vane valve, and the control method comprises the following steps that the current rotating speed of the steam turbine is obtained; and when the current rotating speed exceeds the first preset range, the calculated opening degree of the air inlet guide vane valve is adjusted, so that the current rotating speed is within the first preset range. According to the embodiment of the invention, the load of the power system and the corresponding actual steam consumption amount can be adjusted according to the opening degree of the air inlet guide vane valve of the compressor, so that the steam consumption amount is ensured to be limited within the maximum steam supply amount; and shutdown caused by steam turbine stall due to maximum steam supply limitation and mismatching of the whole machine power is avoided, and shutdown caused by compressor surge is also avoided.

Description

technical field [0001] The present disclosure relates to the technical field of power system control, and in particular to a control method, control device and power system for a power system. Background technique [0002] When the centrifugal compressor driven by the back-pressure steam turbine is used as a stable compressed air provider, it needs to have sufficient steam supply, so there is no need to match the steam volume, and only needs to be responsible for providing stable compressed air. However, when the maximum steam supply provided by the outside world is limited, that is to say, the goal of configuring the steam turbine to drive the centrifugal compressor has changed from mainly providing stable compressed air to dynamically adjusting the compressor load, that is, adjusting the load of the back pressure steam turbine , so as to ensure that the overall power of the power system does not exceed the power that can be provided by the maximum steam supply. [0003] S...

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Problems solved by technology

[0004] In view of this, an embodiment of the present disclosure provides a control method, a control device, and a power system for a power system to solve the conventional back pressure turbine-driven compressor controller in the prior art. The goal of the controller is to provide a stable Compressed air, so it cannot automatically match the steam supply, that is, it cannot ensure that the power of the whole machine does not exceed the power that the maximum steam supply can provide, etc.

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