The control of voltage and power factor on interconnected systems

The paper describes the principles governing the parallel operation of power stations and gives the results of practical tests made to confirm the formula for the synchronous capacity required in an interconnector between power stations. The varous types of appratus available to regulate the interconnector current are described, and the requirements for satisfactory voltage and power factor control at the power stations are considered. The effect of operating interconnectors in parallel is examined in detail and it is shown that full commercial advantage can be obtained only if certain conditions are fulfilled. It is concluded that fine adjustment of the boost voltage in an interconnector is required and that interconnectors cannot be indiscriminately paralleled.