京剧的四种表演形式:汉译英（谢绝机译）

稳态运行特性 steady state running property
潮流分布load flow distribution
正常运行工况common running mode

The electric running steady state is called common running mode, whose calculational emphases is load flow distribution, including that of voltage, current, and power, mainly on distributions of voltage and power. Load flow calculation in electric system is the main method in the analysis of common running mode, and is the widest, most elementary, and most improtant distribution. Its task is calculation of all the running parameters in the system when gaining some known or given running parameters. Through the calculations we can analysis and estimate the rationality, economy, security, and dependability of the running mode of the system, and put forward the modification. At the same time, load flow calculation is a basic work in planning and designing of electric systems. Modern electric system is a complicated system, and the nature of load flow calculation is the course of calculating complicated network, so the analysis and calculation must depend on computers.