Voltage sag generating device based on magnetic controllable reactor (MCR)

Abstract

The invention discloses a voltage sag generating device based on a magnetic controllable reactor (MCR). The device comprises a fixed reactor, the magnetic controllable reactor, a photovoltaic power station and a control system; the magnetic controllable reactor is connected with the photovoltaic power station in parallel, and then the fixed reactor is connected to a generatrix with a known voltage level power source; a voltage with a known voltage level power source is marked as UN; one end of the control system is connected to the line inlet of the photovoltaic power station, and the other end of the control system is connected with the magnetic controllable reactor. According to the device, a voltage value of the line inlet of the photovoltaic power station is detected by the magnetic controllable reactor in real time, a reactance value of the magnetic controllable reactor is controlled, so that the wire inlet voltage value of the photovoltaic power station changes from 10% to 90%, a network voltage sag when a network is broken is stimulated, and the grid-connected low voltage ride through capacity of the photovoltaic power station is detected; in addition, based on the achievement of the magnetic controllable reactor, an inductance value can be continuous, stepless and adjustable, and the grid-connected low voltage ride through capacity of the photovoltaic power station can be accurately detected.

Description

technical field [0001] The invention relates to a voltage sag test device in the technical field of new energy distributed power generation connected to a grid, in particular to a voltage sag generating device based on a magnetron reactor (MCR). Background technique [0002] At present, photovoltaic power generation has become an important form of development and utilization of solar energy resources. The connection of large-scale photovoltaic power stations will have a profound impact on the safe and stable operation of the power grid, especially when the power grid is faulty, the sudden disconnection of photovoltaic power stations will further deteriorate the operation of the power grid. , with more serious consequences. [0003] At the end of 2010, the State Grid Corporation of China issued the "Technical Regulations for Connecting Photovoltaic Power Stations to the Grid", which clearly stated that "photovoltaic power stations should have a certain ability to withstand ab...

AI Technical Summary

Problems solved by technology

[0004] Therefore, in the case of a grid fault, in order to prevent the photovoltaic power plant from suddenly going off the grid and further deteriorating the operating state of the grid, a device that can test its low voltage ride-through capability is needed; however, there is no related research in the prior art Program

Images