High-altitude photovoltaic power station grid disturbance simulation test system mobile detection equipment

Abstract

The invention relates to a mobile detection device for a high-altitude photovoltaic power station grid disturbance simulation test system. The set of detection devices adopts the structure of a vehicle-mounted container, and adopts a highly integrated design to concentrate in three containers, which are respectively centralized control and transformer containers, step-down Transformer container, step-up transformer container. The detection equipment reduces the high voltage on the grid side to low voltage through the step-down transformer, then connects the low-voltage inverter, and then raises it to the high-voltage side through the step-up transformer, and connects the photovoltaic power station under test. The mobile detection equipment of the high-altitude photovoltaic power station power grid disturbance simulation test system of the present invention is applied to the mobile detection of high-altitude large and medium-sized photovoltaic power stations below 4000 meters, can meet the requirements of on-site detection of photovoltaic power stations with a capacity of 1.5MW and below, and can simulate the steady state of the power grid When the voltage and frequency disturbances are detected, the ability of photovoltaic power plants to adapt to grid disturbances is detected.

Description

technical field [0001] The invention relates to a mobile detection system for a grid disturbance simulation system of a photovoltaic power station, in particular to a mobile detection device for a high-altitude photovoltaic power station grid disturbance simulation test system. Background technique [0002] In recent years, my country has vigorously supported the development of new energy technologies. With the rapid increase in the proportion of solar photovoltaic power generation installed capacity, the power system, like wind turbines, puts forward the requirements for the operation capacity of large and medium-sized photovoltaic power stations connected to the power grid when the power grid has a transient fault. The State Grid Corporation of China's "Technical Regulations on Connecting Photovoltaic Power Stations to the Grid" clearly requires that large and medium-sized photovoltaic power stations have the ability to resist grid frequency disturbances. [0003] With the ...

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Problems solved by technology

[0004] At present, the photovoltaic industry in high-altitude areas, especially Qinghai, is in a state of rapid development, and the grid disturbance test of grid-connected inverters in photovoltaic power plants cannot meet the requirements of photovoltaic power plants at higher altitudes due to the limitations of the testing equipment due to altitude and insulation distance. Requirements for grid-connected testing

[0005] Most of the photovoltaic power stations in Qinghai Power Grid are concentrated in the terminal power grid with weak grid structure and small load base, which is reversely distributed with the power load. In addition, the intermittent and fluctuating output of photovoltaic power stations has a great impact on the safe and stable operation of the power grid.

At present, photovoltaic grid-connected testing equipment for inverter testing items is restricted by testing equipment and cannot perform high-voltage disturbance performance testing

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