Power distribution network feeder level load power control method based on model predictive control

Abstract

The invention relates to a power distribution network load control technology, and in particular to a power distribution network feeder level load power control method based on model predictive control. The method comprises the following steps: establishing a load voltage / active power coupling characteristic model according to on-site measured data, and establishing a feeder level load control model based on a DVR device by utilizing the coupling characteristic model; establishing a source load tracking model based on pre-scheduling- real-time control framework; in the pre-scheduling process,judging the starting and stopping conditions of the DVR according to the predicted value of the power of the next network point, and the real-time control tracking value is calculated by establishinga power flow optimization model containing multiple DVRs; in real-time control, firstly, carrying out ultra-short-term prediction on the power of a lower network point according to a controlled autoregressive integral moving average model; and then using a model prediction control algorithm for carrying out rolling optimization solution on the voltage regulation amount of the DVR. According to themethod, the influence of the DVR on the power distribution network is reduced in the control process, the adjustable capacity of the load is fully utilized, the adjustment range is expanded, and thepossibility is provided for large-scale photovoltaic access to the power distribution network.

Description

technical field [0001] The invention belongs to the technical field of distribution network load control, in particular to a distribution network feeder-level load power control method based on model predictive control. Background technique [0002] With the reduction of photovoltaic equipment manufacturing costs, the capacity of distributed photovoltaics connected to the distribution network has increased rapidly in recent years. Since the photovoltaic output will be affected by uncertain factors such as clouds and irradiance, its power will fluctuate violently in a short period of time. The rapid ramp-up of photovoltaic power will lead to a large shift in the operating point of the distribution network. In order to ensure the safe operation of the equipment and avoid overload, the power grid usually reserves a certain safety margin for the equipment, resulting in a low load rate of the equipment. Therefore, some power transmission System operators have formulated regulati...

AI Technical Summary

Problems solved by technology

Most of the existing literature uses the PID control algorithm of a single time section to calculate the control quantity, and fails to consider the coordination of multiple time sections to maximize the smoothness of photovoltaic power fluctuations.

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