Evaluation method of distribution network distributed generation penetration rate based on continuous power flow

Abstract

The invention provides a power distribution network distributed power supply permeability evaluation method based on a continuous flow. The method comprises the steps of 1), acquiring a time-varying curve of a DG output power, and performing segmental linearization of the curve for forming N segments of broken lines; and 2), for each output power segment, evaluating the distributed power supply output power permeability at a random time point by means of a continuous flow method. According to the power distribution network distributed power supply permeability evaluation method, the continuous flow method is applied to distributed power supply permeability evaluation of the power distribution network. The power distribution network distributed power supply permeability evaluation method can overcome a problem of no convergence at a position which is next to a branching point according to a routine flow algorithm and can accurately calculate permeability of distributed power supplies. According to the power distribution network distributed power supply permeability evaluation method, for the continuously changing distributed power supply output power curve, the linearization method is utilized. For each linear output segment, the continuous flow method is used for continuously tracking continuous output power change, and the distributed power supply permeability of the system can be more accurately evaluated.

Description

technical field [0001] The invention belongs to the field of maximum transmission capacity of a power distribution system, in particular to a method for evaluating the penetration rate of a distributed power supply in a power distribution network based on a continuous power flow. Background technique [0002] In recent years, due to the depletion of traditional fossil energy, the deterioration of environmental problems, the rapid development of new energy technologies and the incentives of national policies, a large number of distributed power generation (DG) has been connected to the distribution network. How can we ensure the safety and stability of the system? Under the premise, it has become a current research hotspot to consume as much electric energy as possible from distributed power generation and improve the utilization efficiency of distributed power generation. [0003] Due to the randomness, intermittent and other uncontrollable factors of primary energy such as ...

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Problems solved by technology

However, there are two unavoidable problems in this method. One is that this method can only evaluate the distributed power penetration rate at discrete and isolated time points; When , the traditional power flow calculation method does not converge and cannot accurately evaluate the penetration rate of distributed power

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