Active distribution network multi-time scale optimization method considering source-grid-load coordination interaction

Abstract

The invention provides an active distribution network multi-time scale optimization method considering source-grid-load coordination interaction. The method comprises the following steps: (1) in view of a given distribution network with a distributed power supply, in combination of weather information, next-day 24h load prediction and distributed power supply output prediction are carried out; (2) in consideration of constraints of switching operation times, time partitioning is carried out on a next-day 24h load curve; (3) according to a load curve partitioning result, day-ahead multi-time period source-grid coordination optimization is carried out; (4) based on a day-ahead power grid scheduling plan and distributed power supply output arrangement, daily flexible load optimization scheduling is carried out; and (5) through the source-grid coordination optimization and the flexible load optimization scheduling, the distributed power supply and various flexible loads are made full use of, and source-grid-load real-time power balance is achieved. Reasonable power flow distribution is realized, the grid loss can be effectively reduced, the node voltage level and the power quality are enhanced, and the economy and the reliability of power grid operation are enhanced.

Description

technical field [0001] The invention belongs to the technical field of distribution network operation control, and in particular relates to a multi-time-scale optimization method for an active distribution network considering the coordination and interaction of a source network and a load. Background technique [0002] The traditional distribution network is a one-way power distribution network based on the grid power supply and user power consumption, and it is a dual structure of "grid-load". With the continuous growth of electricity demand, the shortage of traditional energy sources, and the opening of the electricity market, the power grid is developing towards high efficiency, flexibility, intelligence, and sustainability. Sustainability is manifested in the scale-up of distributed power sources, especially a large number of renewable energy sources. access and application. With the access of a large number of distributed power sources, the distribution network has bee...

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Problems solved by technology

[0003] For the large-scale access of distributed power, no effective coordinated control scheme has been proposed at the system level, and the research focuses on the site selection and capacity optimization of distributed power; in

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