Photovoltaic inverter two-phase SVC optimization control method in tractive power supply system

Abstract

The invention discloses a photovoltaic inverter two-phase SVC optimization control method in a tractive power supply system. The system is capable of monitoring the voltage of a phase A of a power system, the voltage and current of phase a and b supply arms of the tractive power supply system and the output power of a photovoltaic power station in real time. The method comprises the following steps: acquiring a phase of the phase of the phase A voltage of the power system through a fundamental current amplitude and phase extraction module, simultaneously inputting the amplitude of the voltage and current and the phase information of phase a and b supply arms as well as the output power of the photovoltaic power station, calculating to obtain the optimal operating parameters of the photovoltaic inverter two-phase SVC under the condition. According to the control method provided by the invention, the power factor added into the tractive power supply system of a photovoltaic power generation system is as high as possible, and the negative-sequence current added into the tractive power supply system of the photovoltaic power generation system is as low as possible, so that the electric energy quality of the system is improved, and the system power supply is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of traction power supply, in particular to a two-phase SVC optimal control method for a photovoltaic inverter in a traction power supply system. Background technique [0002] Photovoltaic power generation has the characteristics of cleanness, no pollution, no noise, and scalable scale. It is one of the best choices to solve the energy crisis. At present, the development of photovoltaic power generation is being strongly supported by national policies, and the rapid development of photovoltaic power generation technology provides an opportunity for its promotion and application in the railway field. The scale of railway transportation enterprises is huge, with a large number of station buildings, warehouses, real estate, etc. If these facilities are utilized to the greatest extent, and distributed photovoltaic power generation projects are vigorously developed, a large amount of electricity costs can be saved...

AI Technical Summary

Problems solved by technology

[0005]In actual work, the photovoltaic inverter has a certain reactive power adjustment capability, and does not always maintain a unity power factor output; under this condition, it will cause traction power supply system The required compensation current and the generated negative-sequence current are different from the original operation mode, which makes the power factor of the traction power supply system low and the negative-sequence current large, which has a great impact on the power quality of the traction power supply system

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