Active power distribution network interconnection system stability control method considering new energy access

Abstract

The invention provides an active power distribution network interconnection system stability control method considering new energy access, comprising the following steps: firstly, the efficiency degree of the function of a power system stability controller is calculated to obtain an optimal installation place of the controller; secondly, the controller is divided into two layers, the first layer is a local power system stability controller which is used for suppressing local oscillation, is designed on a strong correlation unit of the controller and only feeds back a local unit signal, and thesecond layer is a remote interconnection power system stability controller which is arranged on the strong correlation unit of the controller and aims at a system interconnection oscillation mode; and finally, a local power system stability controller and a remote interconnected power system stability controller are designed. The active power distribution network interconnection system stabilitycontrol method considering new energy access has the beneficial effect that the low-frequency oscillation of a polymorphic energy utilization interconnection system is suppressed and the stable operation level of an active power distribution network system is improved.

Description

technical field [0001] The present invention relates to the field of safety and stability control of multi-state energy utilization systems, in particular to a stability control method for an active distribution network interconnection system that takes into account the access of new energy sources. Background technique [0002] In the power system, when the generators run in parallel through the transmission line, the relative swing between the rotors of the generators will occur under the disturbance, and the continuous oscillation will be caused when the damping is insufficient. At this time, the power on the transmission line also oscillates correspondingly. Because the oscillation frequency is low, generally 0.1-2.5Hz, it is called low-frequency oscillation. In recent years, with the increasing connection between active distribution networks and the access of a large number of new energy sources such as distributed wind power and photovoltaic power generation, the probl...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a stable control method for an active distribution network interconnection system that takes into account the access of new energy, which solves the problem of low-frequency oscillation caused by a large number of distributed new energy units connected to the distribution network for system interconnection, and effectively suppresses polymorphism Beneficial effects of low-frequency oscillation of the energy interconnection system and improvement of the stable operation level of the active distribution network system

Images