Power distribution network dynamic and static reactive equipment optimal configuration method considering multi-microgrid connection

Abstract

The invention belongs to the field of power distribution network planning and particularly relates to a reactive configuration optimization method of a power distribution network under a microgrid connection condition, and a reactive compensation equipment optimal configuration method of coordinated planning of a switchable parallel capacitor bank (C) and a static var generator (SVG) (the structure is shown in a figure) is proposed. Firstly, the microgrid connection point load characteristics are considered, on the basis, a double-layer optimal planning model for coordinated configuration of dynamic and static reactive equipment is established, the upper layer model takes the sum of the life cycle cost (LCC) of the equipment and the grid operation cost as a target function, and the configuration mode of the reactive compensation equipment is optimized; the lower layer model takes the minimum operation cost as a target function, the operation mode of the capacitor bank is optimized, andmodel solution is carried out by adopting an improved genetic algorithm. Finally, the validity of the model is verified with a modified IEEE33 node as an example. The simulation result shows that through the planning method, the power quality can be obviously improved, and the network loss can be reduced; and compared with the traditional method, the coordinated planning method can be more suitable for the active power distribution network.

Description

technical field [0001] The invention belongs to the field of distribution network planning, and in particular relates to a method for optimizing reactive power configuration of a distribution network under the condition of grid-connected micro-grids. Background technique [0002] When a large number of photovoltaic (PV), wind power, and grid-connected microgrids are connected to the distribution network, due to the randomness of new energy generation, it will cause problems such as large fluctuations in grid voltage and even limit violations. The voltage and reactive power adjustment methods based on taps and capacitors in the traditional distribution network are far from meeting the requirements of future distribution network operation in terms of adjustment margin and real-time performance. How to comprehensively consider the economy and power quality to carry out the allocation of reactive power equipment in the distribution network to meet the needs of new energy grid in...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose an economical and effective dynamic and static reactive power equipment optimization configuration method to solve the problems of insufficient reactive power and excessive voltage deviation when multi-microgrids are connected to the grid;

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