Configuration optimization calculation method for reactive power equipment of 220kV transformer substation

Abstract

A configuration optimization calculation method for reactive power equipment of a 220kV transformer substation comprises the following steps: firstly, collecting bus operation data of the 220kV transformer substation in a certain time interval, carrying out power factor diagnosis according to a power factor diagnosis model, screening out unqualified operation data, then constructing a capacitive reactive power optimization model and an inductive reactive power optimization model, and optimizing the reactive power compensation device by using the unqualified operation data in the peak load and valley load time periods. According to the method, power factor diagnosis can be carried out on all 220kV transformer substations in a region, reactive power optimization is carried out on the transformer substations with unqualified power factors, and a reactive power configuration optimization scheme is provided. The method has the advantages of being simple and easy to use, high in calculation speed, high in calculation precision and capable of reducing reactive equipment investment, and effectively solves the technical problem that an existing transformer substation is unreasonable in configuration.

Description

technical field [0001] The invention relates to the field of reactive power compensation equipment, in particular to a configuration optimization calculation method for reactive power equipment in a 220kV substation. Background technique [0002] In recent years, with the growth of residential and industrial electricity consumption in my country, the demand for high-quality power supply has attracted more attention. At the same time, the large-scale access to new energy sources such as wind power and photovoltaics has brought a great impact on the stability of the grid, resulting in substandard indicators such as grid voltage and power factor. The optimization of reactive power compensation devices plays an important role in the stable and safe operation of substations and the improvement of power supply quality. At present, engineers and technicians have done a lot of work on the optimization of reactive power compensation devices. The main optimization methods are as foll...

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Problems solved by technology

At present, engineers and technicians have done a lot of work on the optimization of reactive power compensation devices. The main optimization methods are as follows: ① Trial-installation of compensation devices according to experience values—operation and use—improvement—re-installation of compensation devices. To achieve the expected purpose, this method has low efficiency and high investment costs; ② optimize the configuration according to the recommended ratio of reactive power configuration (10-25% of the main transformer capacity value) in the 220kV high-voltage substation. The reactive capacity is configured according to the situation, and the configuration of the inductive reactive device is ignored, so there are disadvantages such as unreasonable reactive power compensation and waste of investment.

③Intelligent heuristic methods and improved traditional algorithms are used to improve the grid reactive power compensation algorithm, but these algorithms are often used in theoretical research, the modeling is complex, and the calculation time is long. Generally, reactive power optimization is carried out for certain load levels Optimization, failure to take into account the load changes in the whole year or longer time intervals, it is difficult to solve the practical problems of reactive power compensation requirements under various operating conditions of substations

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