branch current

State estimation method of distribution network based on load current takes load current as state variable, the branch measurement function is represented with load current, and the state estimation value of branch current can be obtained, which reduces the solution space of state estimation problem and raises the convergence of algorithm and calculation speed.

基于负荷电流的配电网状态估计方法以负荷电流为状态变量,将支路测量函数用负荷电流表示,利用三相潮流计算方法得到支路电流的状态估计值,从而降低了状态估计问题的求解空间,提高了算法的收敛性和计算速度,通过将该算法与三相潮流计算法比较,结果表明状态估计算法在效果、速度、收敛性方面都较常规方法优越。

A new SE algorithm for distribution network is developed, its power flow algorithm is based on the ZBUS method and for the arborescent radial structure of distribution network a measurement transformation method based on branch current is adopted .

该算法中的潮流算法是基于ZBUS法的潮流算法,并针对配电网的树状辐射形结构,采用了基于支路电流的量测变换方法以处理量测量,经特殊处理后也可以方便地处理电流幅值量测和节点电压量测。

The electrical characteristics of an S-shaped joint in a jointless track circuit were analyzed using the branch current method of circuit theory.

S型电气绝缘节是一个小参数和分布参数电路,为了分析S型绝缘节对无绝缘轨道电路中信号传输的影响,运用电路理论的支路电流法讨论了其数学模型的建立与仿真算法的实现,给出了绝缘节的输入阻抗、电压传输和电压隔离特性曲线,并分析了绝缘节的选频能力以及在绝缘节内分路时对轨道电路接收性能的影响。