Multi-access voltage grade test method of low-voltage ride through detection device

Abstract

The present invention relates to a multi-access voltage grade test method of a low-voltage ride through detection device. The method comprises: adding a constraint condition; and obtaining the inductance values of an electric reactor in different constraint conditions. The problem is solved that the integration testing of a large-scale photovoltaic power station grid-connected unit and access of different voltage grades, and the multi-access voltage grade test method of the low-voltage crossing detection device improves the detection level and the utilization of a photovoltaic low-voltage crossing detection device, reduces the detection cost and provides convenience for the photovoltaic grid connected detection business. The technology blank for the related field of the multi-access voltage grade adaptation of the photovoltaic power generation low-voltage ride through detection device is filled.

Description

technical field [0001] The invention relates to the technical field of new energy detection, in particular to a multi-access voltage level test method for low-voltage ride-through detection equipment. Background technique [0002] Photovoltaic power generation is an unstable power source with strong volatility, randomness, and intermittency. Large-scale access will bring many adverse effects to the safe and stable operation of the power grid, mainly manifested in grid stability problems and power quality problems: When a large disturbance occurs in the power grid, if the photovoltaic power station does not have low-voltage ride-through capability, it will cause a large area to be disconnected from the grid, which will bring a secondary impact on the power grid and affect the transient stability of the power grid. After the photovoltaic power station is connected to the grid, it will have an impact on the power quality of the grid, including voltage deviation, voltage variati...

AI Technical Summary

Problems solved by technology

[0002] Photovoltaic power generation is an unstable power source with strong volatility, randomness, and intermittency. Large-scale access will bring many adverse effects to the safe and stable operation of the power grid, mainly manifested in grid stability problems and power quality problems: When a large disturbance occurs in the power grid, if the photovoltaic power station does not have low-voltage ride-through capability, it will cause a large area to be disconnected from the grid, which will bring a secondary impact on the grid and affect the transient stability of the grid.

[0007] The photovoltaic low-voltage ride-through mobile detection system that uses reactors as the main equipment generally uses a set of detection equipment for 10kV power grids, a set of detection equipment for 35kV power grids, or the same set of equipment (such as circuit breakers) for breaking devices in the detection system. A set of 10kV devices and a set of 35kV devices are used for the transformer, and the two are not compatible

[0008] At present, there are no relevant literatures and patents on the multi-access voltage level adaptability test method of photovoltaic power generation low-voltage ride-through detection equipment

Images