Power quality governance optimization method for low-voltage power distribution system of finished automobile factory

Abstract

The invention discloses a power quality governance optimization method for a low-voltage power distribution system of a finished automobile factory. Based on the parameters of a low-voltage power distribution system and the power quality characteristics of a load in a finished automobile factory, the lowest power quality compensation degree meeting the power quality assessment requirement is determined by calculating the power quality disturbance limit value of a distribution transformer and the electric energy disturbance generation amount of a load, and the model of a power quality governance device is determined according to the power quality governance demand. Then, by taking the economy of power quality governance schemes under different capacity configurations as a constraint condition and the maximum return on investment as an optimization objective, the investment value is maximized on the premise that the power quality meets standard requirements, and a feasible method is provided for power quality governance optimization of a low-voltage power distribution system of a finished automobile factory.

Description

technical field [0001] The invention belongs to the technical field of power quality, and in particular relates to a power quality control and optimization method for a low-voltage power distribution system of a vehicle factory based on power quality and economic constraints. Background technique [0002] Power quality is an important indicator of electric power industry products, involving rights and interests in all aspects of power generation, supply and use. With the development of power electronics and equipment manufacturing technology, as well as changes in electricity demand, the number of users of power quality disturbance sources in the power grid is gradually increasing, resulting in power quality problems such as harmonics, voltage fluctuations and flicker, and three-phase unbalance in the power grid. particularly prominent. [0003] The automobile manufacturing process of the OEM mainly involves stamping, welding, painting, final assembly and other production p...

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Problems solved by technology

[0005] The purpose of this invention is to solve the problem that the existing low-voltage power distribution system design of the whole vehicle factory fails to consider the power quality control scheme effectively from the design level, and proposes An optimization method for power quality control of low-voltage power distribution systems in vehicle plants based on power quality and economic constraints, that is, for the problem of power quality control in low-voltage power distribution systems in vehicle plants, the harmonics, reactive power and three Power quality indicators such as phase imbalance and the return on investment of power quality control devices are used as constraints to provide a practical method for the optimal design of power quality control for low-voltage power distribution systems in vehicle factories

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