Abstract: A method of surge protection for a dynamic compressor that has a corresponding compressor map. A control system continually calculates an equivalent polytropic head parameter in order to define a surge limit line. The system then calculates a control parameter and determines the distance the control parameter to the surge limit line wherein the control parameter is dynamic to changes in gas compressibility and invariant to changes in suction conditions and gas compressibility. As a result of the distance of the control parameter to the surge limit line, the surge valve of a dynamic compressor is actuated to prevent surge.

Abstract: A method of preventing surge in a dynamic compressor is disclosed. The method includes providing an anti-surge valve having an adjustable opening for increasing the flow through a dynamic compressor. The next step is sensing process conditions in the dynamic control to determine a compressor load variable. A control system estimates a process disturbance model using the compressor load variable. The control system then adjusts a safety margin using a rate limited response and initiates a closed loop response using process feedback based on the process disturbance model. The control system adjusts the opening of the anti-surge valve according to the safety margin and closed loop response.

Abstract: A method of preventing surge in a dynamic compressor is disclosed. The method includes providing an anti-surge valve having an adjustable opening for increasing the flow through a dynamic compressor. The next step is sensing process conditions in the dynamic control to determine a compressor load variable. A control system estimates a process disturbance model using the compressor load variable. The control system then adjusts a safety margin using a rate limited response and initiates a closed loop response using process feedback based on the process disturbance model. The control system adjusts the opening of the anti-surge valve according to the safety margin and closed loop response.

Abstract: A control system for operating a device in a turbo machine system. The system includes a first programmable logic control device producing an analog output signal and a relay circuit electrically connected to the first programmable logic control device to receive the analog output signal. A field device is electrically connected to the relay circuit to receive the analog output signal to operate based on the analog output signal to provide a load. In addition, the relay circuit is electrically connected to a second programmable logic control device to communicate the analog output signal to the second programmable logic control device to monitor the analog output signal.

Abstract: An automated service broker can include a Global Positioning System (GPS) data processor for processing GPS data associated with communicatively linked service providers wherein the GPS data corresponds to a geographic position. The automated service broker also can include an event handler for responding to maintenance and repair events received from communicatively linked systems. Finally, the automated service broker can include a service provider selector for selecting a particular service provider to respond to a particular received maintenance and repair event received from a particular communicatively linked system. More particularly, the service provider can be selected based on whether the selected service provider is suitable to perform required maintenance and repair on the particular communicatively linked system, and the geographic position of the particular service provider relative to the particular system as reported by GPS data associated with the particular service provider.

Abstract: An automated building service broker can include a Global Positioning System (GPS) data processor for processing GPS data associated with communicatively linked service providers wherein the GPS data corresponds to a geographic position. The automated service broker also can include an event handler for responding to maintenance and repair events received from communicatively linked building systems. Finally, the automated building service broker can include a service provider selector for selecting a particular service provider to respond to a particular received maintenance and repair event received from a particular communicatively linked building system.