114 shown in fig3 for clarity only one phase of the three phase medium voltage collector system 109 is illustrated in fig3 although only one main power transformer is shown at 300 two or more transformers may be employed for each main utility interface transformer 300 a single watt amp var transducer 306 is used to determine the overall wind tidal farm power reactive power line voltage and current the transducer 306 is connected to the utility line 115 via a transformer 302 to sense voltage value a current transformer ct 1 305 via a connection 304 is provided to sense current value only one phase is shown in fig3 these values are sent to the programmable logic controller plc or embedded controller 310 over communication bus 308 the controller 310 determines the difference between the required voltage or power factor set point and the actual measured value a user interface is provided by an industrial personal computer pc 314 which communicates with the controller 310 over a bus 312 as shown in fig3 the embedded controller or a programmable logic controller plc 310 receives the output 308 of the watt transducer 306 this data contains utility line voltage current power and reactive power refer to fig4 which is a more detailed block diagram of.