Abstract: A monitoring and controlling apparatus includes a functional cabinet, functional units, and a control cabinet. The functional cabinet includes a plurality of frames and a door at an opening of at least a part of the frames, each frame having a predetermined accommodation size. Each functional unit is detachably accommodated in respective frame and including a circuit and a component for a function of the functional unit. The control cabinet is disposed next to the functional cabinet, and configured to monitor and control the functional units.

Abstract: A monitoring and controlling apparatus includes a functional cabinet, functional units, and a control cabinet. The functional cabinet includes a plurality of frames and a door at an opening of at least a part of the frames, each frame having a predetermined accommodation size. Each functional unit is detachably accommodated in respective frame and including a circuit and a component for a function of the functional unit. The control cabinet is disposed next to the functional cabinet, and configured to monitor and control the functional units.

Abstract: In accordance with an embodiment, a plant control apparatus includes a deviation calculation unit, a velocity-type PID calculation unit, a plurality of integral calculation units, a plurality of overwrite units, and an automatic balance unit. The deviation calculation unit calculates a deviation between a process value from a plant with operation terminals and a set value corresponding to a control object, and generates a deviation signal. The velocity-type PID calculation unit generates a velocity-type operation amount command signal corresponding to the deviation. The integral calculation units generate position command signals as defined operation terminal position command signals. The overwrite units generate additional position command signals to perform overwrite processing and newly define operation terminal position command signals.

Abstract: In accordance with an embodiment, a plant control apparatus includes a deviation calculation unit, a velocity-type PID calculation unit, a plurality of integral calculation units, a plurality of overwrite units, and an automatic balance unit. The deviation calculation unit calculates a deviation between a process value from a plant with operation terminals and a set value corresponding to a control object, and generates a deviation signal. The velocity-type PID calculation unit generates a velocity-type operation amount command signal corresponding to the deviation. The integral calculation units generate position command signals as defined operation terminal position command signals. The overwrite units generate additional position command signals to perform overwrite processing and newly define operation terminal position command signals.

Abstract: A plant controlling system includes: a velocity-type PID controlling unit to receive a control deviation between a process value and control set value, and calculate and output a manipulated variable deviation for operation targets; a switching unit to switch and then output the manipulated variable deviation from the velocity-type PID controlling unit to the operation targets; manual operating units, having an integration function, that are associated with the operation targets and output either one of the manipulated variable calculated by the integration of the manipulated variable deviation output from the switching unit and a manipulated variable based on a manually set value to the respective associated operation targets based on a control mode of the operation targets; and a switch controlling unit configured to control operation of the switching unit based on the control mode of the operation targets and the manipulated variables output to the operation targets.

Abstract: A power generation complex plant has a control switch, an overall control unit and a steam bypass facility. The overall control unit determines that a desired steam volume has reached a limit value of the volume of steam to be generated by a steam generating facility. A steam bypass facility control unit adds a bias value B1 to a control command value V4 of the steam bypass facility to generate a new control command value V5 when the desired steam volume is determined to have reached the limit value. The steam bypass facility control unit then controls the volume and pressure of steam passing through the steam bypass facility on the basis of the new control command value V5 so that no switch of control may be made in the control switch.

Abstract: A turbine starting controller includes: an optimum starting control unit for predicting, while taking as a variable a turbine acceleration rate/load increase rate as a directly manipulated variable, thermal stress generated in a turbine rotor over a prediction period from a current time to the future, calculating for each control cycle a manipulated variable optimum transition pattern in the prediction period which makes a turbine starting time shortest while keeping the predicted thermal stress equal to or lower than a prescribed value, and determining as an actual optimum manipulated value a value at the current time in the manipulated variable optimum transition pattern; and an rpm/load control unit to which the optimum manipulated variable from the optimum starting control unit is input, for controlling the drive of control valves.

Abstract: A plant controlling system that controls a process value of a plant by operating a plurality of operation targets includes: a velocity-type PID controlling unit to receive a control deviation between the process value and a control set value, and calculate and output a manipulated variable deviation for the operation targets; a switching unit to switch and then output the manipulated variable deviation from the velocity-type PID controlling unit to the operation targets; a plurality of manual operating units, having an integration function, that are associated with the operation targets and output either one of the manipulated variable calculated by the integration of the manipulated variable deviation output from the switching unit and a manipulated variable based on a manually set value to the respective associated operation targets based on a control mode of the operation targets; and a switch controlling unit configured to control operation of the switching unit based on the control mode of the operation

Abstract: A plant monitoring apparatus includes: a process measuring unit; a warning determining unit; a warning selecting unit; a display processing unit; a display/setting unit; a warning criteria setting unit; a warning criteria database; and a warning criteria supplying unit. The warning determining unit determines a plurality of warning data to be issued as warnings from a large amount of process data collected by the process measuring unit on the basis of a predetermined determination criterion. The warning selecting unit compares the plurality of warning data with one or more classification criteria supplied by the warning criteria supplying unit so as to classify the plurality of warning data. Warnings are classified into categories according to the classification and the classified warnings are displayed on the display/setting unit.

Abstract: A power generation complex plant has a control switch, an overall control unit and a steam bypass facility. The overall control unit determines that a desired steam volume has reached a limit value of the volume of steam to be generated by a steam generating facility. A steam bypass facility control unit adds a bias value B1 to a control command value V4 of the steam bypass facility to generate a new control command value V5 when the desired steam volume is determined to have reached the limit value. The steam bypass facility control unit then controls the volume and pressure of steam passing through the steam bypass facility on the basis of the new control command value V5 so that no switch of control may be made in the control switch.

Abstract: A plant control system includes a monitoring operation device and a centralized management device. The monitoring operation device comprises a calling unit which transmits a transmission request of a maintenance screen data of a control program to the management device, a maintenance screen generation unit which generates a maintenance screen by synthesizing the maintenance screen data and control program state values, and a display processing unit which displays the maintenance screen on a display. The centralized management device includes a storage device which stores control device data and maintenance screen data, and a maintenance screen processing unit which transmits the maintenance screen data corresponding to appliances and the control program state values indicating states of the control program to the monitoring operation device.

Abstract: A plant monitoring apparatus includes: a process measuring unit; a warning determining unit; a warning selecting unit; a display processing unit; a display/setting unit; a warning criteria setting unit; a warning criteria database; and a warning criteria supplying unit. The warning determining unit determines a plurality of warning data to be issued as warnings from a large amount of process data collected by the process measuring unit on the basis of a predetermined determination criterion. The warning selecting unit compares the plurality of warning data with one or more classification criteria supplied by the warning criteria supplying unit so as to classify the plurality of warning data. Warnings are classified into categories according to the classification and the classified warnings are displayed on the display/setting unit.

Abstract: A turbine starting controller includes: an optimum starting control unit for predicting, while taking as a variable a turbine acceleration rate/load increase rate as a directly manipulated variable, thermal stress generated in a turbine rotor over a prediction period from a current time to the future, calculating for each control cycle a manipulated variable optimum transition pattern in the prediction period which makes a turbine starting time shortest while keeping the predicted thermal stress equal to or lower than a prescribed value, and determining as an actual optimum manipulated value a value at the current time in the manipulated variable optimum transition pattern; and an rpm/load control unit to which the optimum manipulated variable from the optimum starting control unit is input, for controlling the drive of control valves.