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Voltage dip has become the most user complaint problems about power quality, in order to ease voltage dip to guide the operation, planning and transformation of power grid. In this paper, based on the voltage dip caused by four kinds of busbar fault, the voltage dip matrix of each type fault is established, the grid structure evaluation indexes based on voltage dip is proposed. Based on the column...
In order to study the influence of electrical collector system of wind farm from the perspective of four typical topological structures of electrical collector system of wind farm, sequential Monte Carlo model is established for reliability evaluation of electrical collector system of wind farm with consideration of multiple faults of wind turbine generator (WTG) and collection circuit in wind farms...
Scientific and reasonable black-start scheme is significant to restoration of a power system from a complete blackout. On the basis of the IAHP (standing for improved analytic hierarchy process) and the fuzzy comprehensive evaluation, a new method to assess back-start scheme is proposed in this paper. First of all, the IAHP is used to determine the index weight. After that, trapezoidal membership...
The electromagnetic loop network in power system refers to the annular grid composing of two groups of different voltage grades transmission lines connected by transformers or electromagnetic coupling. The operation of electromagnetic loop network has an important influence on power supply reliability, short-circuit current level, etc. This paper proposes an evaluation method of the open/closed loop...
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