Multi-time-scale active-reactive control method for multi-source coordinated active distribution network

Abstract

The present invention discloses a multi-time-scale active-reactive control method for a multi-source coordinated active distribution network. The method comprises the following steps: (1) wind power,photovoltaic and load power sequences are predicted; (2) uncertain sampling of the source-load prediction error is performed to obtain a scene set covering the entire sampling space; (3) the scene isreduced by the synchronous back substitution reduction technology and a typical scene set is obtained; (4) in a long-time-scale scheduling phase, a control solution for adjusting the device with a limited adjustment times and the charge and discharge state of energy storage are obtained; (5) in a short-time-scale scheduling phase, scheduling instructions for quickly continuously adjusting devicesare solved; (6) in a real-time control phase, the adjustable devices are sequentially adjusted based on the sensitivity analysis of the node voltage so that the safe and stable operation of the powernetwork is ensured. By using the method of the present invention, the coordinated optimization operation of the adjustable devices in the active distribution network and full consumption and efficientutilization of the renewable energy can be realized.

Description

technical field [0001] The invention relates to a multi-time-level active-reactive power control method for a multi-source cooperative active distribution network, belonging to the field of optimal operation of an active distribution network. Background technique [0002] At present, facing the dual pressure of energy depletion and environmental degradation, distributed generation (DG) with renewable, green and clean characteristics is rapidly entering the stage of the world's power industry. At the same time, energy storage technology has changed the simultaneity problem of traditional power system transmission and distribution due to its timing energy regulation function, and will have broad development prospects in the power system. The penetration rate of DG, ESS, SVC and other equipment in the distribution network is increasing day by day, and the traditional distribution network is gradually evolving into an active distribution network with many adjustable and controll...

AI Technical Summary

Problems solved by technology

The grid connection of DG with high penetration rate will cause voltage fluctuation or overvoltage to cause it to go off the grid, which seriously restricts the ability of active distribution network to accommodate renewable energy power generation, and wastes grid resources and renewable energy.

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