標準號：BS EN 62428-2008
中文標準名稱：電力工程.三相交流系統用典型部件.數量和轉換
英文標準名稱：Electric power engineering - Modal components in three- phase a. c. systems - Quantities and transformations
標準類型：P60
發布日期：2009/1/31 12:00:00
實施日期：2009/1/31 12:00:00
中國標準分類號：P60
國際標準分類號：17.220.01
引用標準：IEC 60050-141
適用范圍：This International Standard deals with transformations from original quantities into modalquantities for the widely used three-phase a.c. systems in the field of electric powerengineering.The examination of operating conditions and transient phenomena in three-phase a.c.systems becomes more difficult by the resistive, inductive or capacitive coupling between thephase elements and line conductors. Calculation and description of these phenomena inthree-phase a.c. systems are easier if the quantities of the coupled phase elements and lineconductors are transformed into modal quantities. The calculation becomes very easy if thetransformation leads to decoupled modal systems. The original impedance and admittancematrices are transformed to modal impedance and admittance matrices. In the case ofdecoupling of the modal quantities, the modal impedance and admittance matrices becomediagonal matrices.