Split-phase power flow optimization method and system for large-scale wind power collection power grid

Abstract

The invention relates to a split-phase power flow optimization method and system for a large-scale wind power collection power grid and belongs to the technical field of wind power generation. A split-phase power flow optimization model for performing optimization control from a system level is constructed; a Pareto file multi-target particle swarm optimization algorithm is used for performing optimization solution on the split-phase power flow optimization model; the compensation capacity of each phase of the reactive power compensation device of the collection station and each wind power plant in the large-scale wind power collection power grid at each wind speed is obtained, so that the voltage unbalance degree of all optimization nodes in the large-scale wind power collection power grid can meet the requirement; and the three-phase voltage unbalance phenomenon of a wind power collection region is effectively inhibited on the system level from the global perspective.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and system for optimizing a phase-separated power flow of a large-scale wind power collection grid. Background technique [0002] Three-phase voltage imbalances often occur in large-scale wind power centralized grid-connected areas, and even cause wind turbines to go off-grid in severe cases, which has a great adverse effect on the safe and stable operation of the power system. At present, the research on power flow optimization in wind power collection areas is mostly focused on economic issues such as minimum network loss, minimum total capacity of compensation device settings, and system security issues such as minimum node voltage deviation, but there is a lack of research on improving wind power centralized grid connection through power flow optimization at the system level. In order to study the problem of three-phase voltage imbalance in the region, ...

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Problems solved by technology

[0002] Three-phase voltage imbalances often occur in large-scale wind power centralized grid-connected areas, and even cause wind turbines to go off-grid in severe cases, which has a great adverse effect on the safe and stable operation of the power system

At present, the research on power flow optimization in wind power collection areas is mostly focused on economic issues such as minimum network loss, minimum total capacity of compensation device settings, and system security issues such as minimum node voltage deviation, but there is a lack of research on improving wind power centralized grid connection through power flow optimization at the system level. In order to study the problem of three-phase voltage imbalance in the region, a phase-separated power flow optimization model for suppressing the voltage imbalance of wind farms was established, and the optimization model was introduced to accurately solve the optimization model to obtain the compensation capacity of each phase of reactive power compensation devices in each wind farm and gathering station. Algorithms have great significance and engineering value

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