Design and development of a mobile LVRT testing device

A new type LVRT test device, basing on power electronics technology, has been developed. Compared with traditional reactor VGS, this device overcomes many drawbacks, such as bulky size, difficult to control precision, and difficult to continuously testing. Considering the characteristics of distributed system accessing to the grid by photovoltaic power station, the designed testing platform has the capability of flexible and mobile performance. In this paper, working principle, hardware and software structures, and features have been introduced. Meanwhile, Testing verification and data analysis also have been conducted in laboratory. Based on those procedures, the device has been verified for having excellent effectiveness and practicality. Over that period, the device has been applied and tested on site in the Qinghai, which had got the ideal result as well as in laboratory.