Mitsubishi Heavy Industries Compressor Corporation

Mitsubishi Heavy Industries Limited

Kazuhiro Jahami

Yosuke Nakagawa

Naoto Yonemura

A control device configured to control an inflow adjusting unit that quantitatively adjusts an inflow of a gas into a compressor and to control a valve provided in a second flow passage branching from a first flow passage from the compressor to a compressed gas supply destination includes: a command calculating unit that is configured to calculate a command value for at least any one of the inflow adjusting unit and the valve; and a correction value calculating unit that is configured to calculate a correction value with respect to a command value for at least any one of the inflow adjusting unit and the valve.

Control device, gas compressing system, control method, and program

With regard to a load running system that comprises a plurality of compressors that compress a fuel gas and supply the compressed fuel gas to a load apparatus, this compressor control device comprises: a feedforward control signal generation unit that, on the basis of a value that is found by dividing the total load of the load apparatus by the number of running compressors, generates a first control signal that is for controlling the amount of fuel gas supplied by the compressors; and a control unit that, on the basis of the first control signal, controls the amount of fuel gas supplied by the compressors.

Compressor control device, compressor control system, and compressor control method

A control device () that controls a fuel gas supply system () that comprises: a compressor () that supplies compressed fuel gas to a load apparatus (); an inflow amount regulating means () that regulates the amount of fuel gas that flows into the compressor (); and an anti-surge valve () that is for returning to an inlet side of the compressor () fuel gas that is discharged from the compressor (). The control device () comprises: a main pressure-control unit () that controls the inflow amount regulating means () and the anti-surge valve () on the basis of a feedforward control value that is generated on the basis of the load of the load apparatus () and of a prescribed conversion process, and on the basis of a feedback control value that is generated on the basis of the deviation between a set value and a measured value for the discharge pressure of the compressor (); and an emergency pressure-control unit () that calculates a bias-added control value that is found by adding a predetermined bias value to an anti-surge valve control value that is for controlling the anti-surge valve () and that is calculated on the basis of at least one of the feedforward control value and the feedback control value, and that, on the basis of the occurrence of load variations that are at or above a prescribed value, switches between the anti-surge control value and the bias-added control value and controls the anti-surge valve ().

Control device and control method for a fuel gas supply system

A control device that controls a fuel gas supply system that has: a compressor that supplies compressed fuel gas to a load apparatus; an inflow amount regulating means that regulates the amount of fuel gas that flows into the compressor; an anti-surge valve that is for returning to an inlet side of the compressor fuel gas that is discharged from the compressor; and an inlet pressure-regulating valve that regulates the pressure of fuel gas supplied toward the inflow amount regulating means. The control device includes: a main pressure-regulating unit that controls the inflow amount regulating means and the anti-surge valve using a first feedforward control value that is generated on the basis of the load of the load apparatus and of a first conversion process and using a feedback control value that is generated on the basis of the deviation between a set value and a measured value for the discharge pressure of the compressor; and an inlet pressure-regulating unit that controls the inlet pressure-regulating valve using a second feedforward control value that is generated on the basis of the load of the load apparatus and of a second conversion process.

Control device and control method

A speed controller generates a speed control output signal based on an output target value and a detected speed of a steam turbine, an extraction pressure controller generates an extraction pressure control output signal based on an extraction flow rate target value and a detected extraction pressure of the steam turbine, and when operation signals of a governor valve and an extraction control valve are generated with reference to an extraction map for deriving opening degrees of the valves at an operation point determined depending on the signals, the extraction map is used with a scale of the extraction pressure control output signal in the extraction map being corrected to be multiplied by 'extraction flow rate target value/extraction flow rate actual value' based on a regularly detected extraction flow rate actual value of the steam turbine.

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Hiroshima, Japan

Kazuhiro Jahami