输电网潮流及状态估计计算程序（牛拉、高塞、PQ、直流等各种程序）-lose power flow calculation and state estimation procedures (ox-drawn, high-Cypriot, PQ, DC, and other procedures)

电力系统直流潮流计算，用于计算电力系统的潮流部分 -Power system DC power flow calculation

以全控型器件和PWM 技术为特征的二极管箝位多电平背靠背变换系统，能够实现能量的双向流动、有功功率和无功功率可独立控制、产生的谐波含量小、直流电压可控-Full PWM control type device and a diode clamp technique is characterized multi-level back-conversion system can achieve two-way flow of energy, active power and reactive pow