不对称三相电路的分析及计算

Analysis and Calculation of Three- phase Asymmetric Circuit

在三相电路分析和计算中,不对称电源或负载加大了电路网络分析和计算的难度。对于电源不对称的三相电路,可以根据"对称分量法"将不对称的分量分解成对称的分量,对单相进行分析和计算;对于不对称的静负载,又可以通过直接列出节点电压方程来进行求解。这些方法广泛地应用于不对称三相电路,使得电路变得简单、容易,减少了计算量。算例演示了计算步骤和方法,验证了其有效性和正确性。

In the analysis and calculation of three-phase circuit, the asymmetry of the power supply or load has increased the dif- ficulty of analysis and calculation of circuit network. For three phase circuit power asymmetry, according to the ＂ method of symmetri- cal component ＂, the phase asymmetry is decomposed into symmetric component, then Analysis and calculation for single phase; for the asymmetric static load, can directly through the list of node voltage equations to solve. These methods are widely used in asym- metric three-phase circuits, which makes the circuit more simple, easy, reducing the amount of calculation. A numerical example demonstrates the calculation steps and method, to verify its effectiveness and correctness.