System and Method for a Dynamic Switchable Active Front End - Dynamic Switchable Active Harmonic Filtering System

Abstract

A System and Method for a Dynamic Switchable Active Front End—Dynamic Switchable Active Harmonic Filtering System is disclosed.

What is claimed is: 
     
         1 . A system for controlling a dynamic switchable active front end and active harmonic filter on an oil rig, comprising:
 a processor in data communication with a non-transitory computer readable medium;   a computer program comprising computer executable instructions stored in the computer readable medium for execution by the processor, the computer program comprising:   instructions to determine a status of a first Load on a first DSAFE/DSAHF;   instructions to When the status of the fist load is “present”, Switch the DSAFE/DSAHF to act as a DSAFE to provide power to the first load;   instructions to When the status of the fist load is “absent” of the first load, Switch out the Load  1  to remove the first load from the first DSAFE/DSAHF;   and instructions to Switch the first DSAFE/DSAHF to act as a DSAHF to provide active filtering on the first DSAHF on AC power bus providing to the oil rig; and   instructions to sense on the first DSAFE/DSAHF acting as a DSAHF, harmonic distortion using a current Transformer on a common AC Bus, generate anti-harmonic currents and inject the generated anti-harmonic currents on to the common AC bus to cancel the harmonic currents in the AC Power supplied to the second DSAFE/DSAHF.   
     
     
         2 . The system of  claim 1  wherein the DSAFE/DSAHF is combination of a discrete AFE and a discrete AHF. 
     
     
         3 . The system of  claim 1  wherein the DSAFE/DSAHF is an AFE integrated with an AHF. 
     
     
         4 . The system of  claim 3 , wherein the computer program determines the operation of the integrated DSAFE/DSAHF as a DSAFE and a DSAHF. 
     
     
         5 . The system of  claim 1 , the system further comprising:
 an AC power grid that provides power to the DSAFE/DSAHF; and   an oil rig having equipment as load to which the DSAFE/DSAHF provides power from the AC grid to the load.   
     
     
         6 . A computer readable medium containing a computer program for execution by a processor, the computer program comprising:
 instructions to determine a status of a first Load on a first DSAFE/DSAHF;   instructions to When the status of the fist load is “present”, Switch the DSAFE/DSAHF to act as a DSAFE to provide power to the first load;   instructions to When the status of the fist load is “absent” of the first load, Switch out the Load  1  to remove the first load from the first DSAFE/DSAHF;   and instructions to Switch the first DSAFE/DSAHF to act as a DSAHF to provide active filtering on the first DSAHF on AC power bus providing to the oil rig; and   instructions to Sense on the first DSAFE/DSAHF acting as a DSAHF, harmonic distortion using a Current Transformer on a common AC Bus, generate anti-harmonic currents and inject the generated anti-harmonic currents on to the common AC Bus to cancel the harmonic currents in the AC Power supplied to the second DSAFE/DSAHF.   
     
     
         7 . The medium of  claim 6  wherein the DSAFE/DSAHF is combination of an AFE and an AHF. 
     
     
         8 . The medium of  claim 6  wherein the DSAFE/DSAHF is an AFE with an AHF. 
     
     
         9 . The medium of  claim 8 , wherein the computer program determines the operation of the integrated DSAFE/DSAHF as a DSAFE and a DSAHF. 
     
     
         10 . A method for controlling a dynamic switchable active front end and active harmonic filter on an oil rig, the method comprising:
 determining on a processor status of a first Load on a first DSAFE/DSAHF;   determining on the processor, when the status of the fist load is “present” and Switching the DSAFE/DSAHF to act as a DSAFE to provide power to the first load;   determining on the processor, when a status of the first load is “absent” of the first load and switching out the Load  1  to remove the first load from the first DSAFE/DSAHF;   and instructions to Switch the first DSAFE/DSAHF to act as a DSAHF to provide active filtering on the first DSAHF on AC power bus providing to the oil rig; and   sensing on the processor, on the first DSAFE/DSAHF acting as a DSAHF, harmonic distortion using a Current Transformer on a common AC Bus, generate anti-harmonic currents and inject the generated anti-harmonic currents on to the common AC Bus to cancel the harmonic currents in the AC Power supplied to the second DSAFE/DSAHF.   
     
     
         11 . The method of  claim 10  wherein the DSAFE/DSAHF is combination of an AFE and an AHF. 
     
     
         12 . The method of  claim 10  wherein the DSAFE/DSAHF is an AFE with an AHF.