In terms of process of reading comprehension、reading factors and reading methods,this paper shows the developing situation、features and existing issues in reading research over the past ten years in China and the some solutions are come up with.

The method makes use of the nonlinear participation factors and consequently the effect of power system nonlinearity on system voltage stability can be considered.

A method is proposed by making use of nonlinear participation factors.

The nonlinear participation factor is used to weigh the importance of nodes to steady state voltage stability.

A new calculation method for describing voltage instability coefficient based on model participation factors is proposed in this paper.

In this paper,a power flow algorithm for adjusted distributed slack bus model based on Newton-Raphson method is researched; by means of participation factors,the contribution of substations and DGs to active power loss is calculated by participation factors and the power flow features of existing distribution network after the DGs are grid-connected are analyzed.