A structure scheduling method of power system including wind power and solar power

Abstract

The invention discloses a method for optimizing a power transmission network structure of a power system with wind and photovoltaic power sources. According to the method provided by the invention, anoperating state of a grid power transmission element is brought into an economic dispatch model of a power system; and the model is calculated by combination of a particle swarm optimization algorithm with a non-linear planning interior point method. Decision making is carried out on active outputs and grid power transmission element states of conventional and renewable energy source generator sets in the power grid in advance, so that the economy of grid operation is improved on the premise that the grid voltage support is ensured, the conflict of absorption of renewable energy sources is relieved and thus the renewable energy source is absorbed in a large range for power generation. Therefore, an effective method is provided for economic dispatching of a power system under the background of renewable energy source large-scale grid connection.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a power system structure scheduling method including wind and photovoltaic power sources for short-term operation scheduling of the power system. Background technique [0002] At present, resource and environmental issues force the power system to develop in the direction of cleanliness. Among the existing renewable energy sources, wind energy and solar energy are undoubtedly the hotspots of current research. The large-scale grid-connection of renewable energy has changed the traditional power generation load balance mode. The traditional dispatchable fossil energy power generation has gradually given way to renewable energy power generation, and the contradiction between the source and load of the system has become increasingly prominent. In addition, the proportion of synchronous generators with active excitation regulation in the system is decreasing day by day, while wi...

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Problems solved by technology

[0006] In the face of network topology optimization and network reconfiguration problems, the above schemes proposed a variety of electrical network reconfiguration methods, but with the large-scale access of distributed energy to the distribution network, it increasingly shows the characteristics of active networks, and the source The unbalanced distribution of time and space makes it difficult to clearly separate power transmission and distribution, and the system operating under a fixed grid structure is bound to have contradictions between the source and the grid; the existing technology proposes an economic dispatch method for power systems that takes into account topology optimization of the grid Optimizing the structure of the transmission network improves the utilization rate of the existing network and the flexibility of system operation, but the optimization process does not consider the factors affecting the voltage

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