Review of basic requirements for power system operation 1) explain why power system operators in north america require that the frequency of all generators that supply power to the power network be 60hz (with small variation limits). how should the generators be operated to achieve the 60-hz frequency? 2) name 3 major requirements for normal operation of a power system and explain the rationale of the requirements. 3) consider a 10-mile 3-phase 11-kv power line that brings power to a residential street (called a feeder). the voltage at the sending end of the feeder is 100% of the nominal value (i. e. 11-kv line-line, or 1.0 per unit). the voltage at the receiving end of the feeder (i. e. end point of the power line) is 95% of the nominal value (i. e. 0.95 per unit). answer the following questions: a) if one connects a big capacitor to the receiving end of the feeder, what happens to the feeder voltages at the sending end and at the point of the capacitor connection? b) if one connects a big inductor to the receiving end of the feeder, what happens to the feeder voltages at the sending end and the point of the inductor connection?