Reactive optimizer evaluation method based on digital-analog mixed simulation

Abstract

The invention relates to a reactive optimizer evaluation method based on digital-analog mixed simulation. The reactive optimizer evaluation method comprises the steps of establishing a photovoltaic station equivalent model; collecting grid-connected point voltage and grid-connected current of the photovoltaic station, and outputting to a controller of the reactive optimizer; enabling the controller of the reactive optimizer to receive a dispatched and issued reactive instruction signal or a response signal transmitted according to state change of the power grid so as to work out a reactive instruction signal of each power generation equipment model in the photovoltaic station, and to transmit the reactive instruction signal to each power generation equipment in the photovoltaic station; after each power generation equipment receives the reactive instruction signal, making response according to the corresponding instruction signal, and recording the grid-connected point voltage and grid-connected current signal of the photovoltaic station to obtain static and dynamic reactive response curves of the photovoltaic station; and by analyzing each performance index of reactive response of the whole photovoltaic station, evaluating the control performance of the reactive optimizer. By adoption of the technical scheme, the difficulty that the existing test equipment cannot test the reactive optimizer of the photovoltaic station caused by limitation of capacity of the photovoltaic station can be solved.

Description

technical field [0001] The invention relates to the field of photovoltaic detection, and more specifically relates to a reactive power optimizer evaluation method based on digital-analog hybrid simulation. Background technique [0002] Photovoltaic power generation is affected by the intensity of solar radiation and has the characteristics of volatility and randomness. As the penetration rate of photovoltaic power generation continues to increase, the impact of photovoltaic power generation on the power grid will gradually appear, such as changing power distribution, causing line voltage to exceed the limit, the original Grid voltage regulation scheme failure and other issues. In order to ensure the safe and stable operation of the power grid, the photovoltaic power station should have the ability to regulate voltage, participate in the voltage regulation control of the power system, quickly respond to dispatching instructions, and adjust reactive power output; when the powe...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a reactive power optimizer evaluation method based on digital-analog hybrid simulation, to evaluate the performance of the reactive power optimizer, to provide strong technical support for the hardware-in-the-loop simulation detection and evaluation, and to solve the problem caused by the capacity of photovoltaic power plants. Due to the limitation, the existing test equipment cannot test the reactive power optimizer of photovoltaic power plants

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