| 摘要 |
PURPOSE:To reduce error of a load model by correcting wiring loss, reactance drop and voltage drop of an insulating transformer caused by the current required for constant power, constant reactive power and constant impedance Z modes. CONSTITUTION:A current amplifier 24 for a hybrid three-phase load model 10 is connected through an insulating transformer 28 with the three-phase system model 30 for a system simulator. Output from the current amplifier 24 is applied through a PT 26 onto transformer drop correction operating circuit 12 and a load characteristic operating section 14 for each mode in order to obtain a correction value for compensating the error caused by the impedance voltage drop in the insulating transformer 28 according to the load current. The correction value is operated so that wiring loss, reactance drop and voltage drop of the insulating transformer 28 occurring for specific current values 16-20 for R-T phases, under constant power Po, constant reactive power Qo and constant impedance Z modes, are corrected from the wiring specification of the insulating transformer 28. By such arrangement, error of the load model 10 can be reduced. |
