Research on Lossless Compression Technique Basing on Running-Data of Nuclear Power Plant
Zhiwu Ke, Xiang Rui, Xianling Li, Rui Yu · 2015
The performance of auto control system becomes higher in nuclear power plant (NPP), and the requirement of operation support system changes more advanced. So the inspecting parameters will become more and more, the sampling frequency will change higher and higher, the transmitting data will be produced more and more, the saving space will be demanded bigger and bigger. As auto control system in NPP is a real time system, the saving time of running-data without compression will be increased, and the transmitting data will be walled up or produce error extremely. In this study, we research the statistic character of the running-data by using the experiment data, and then compare the performance between common lossless compression coding methods. The results produced by using experimental data can show that: the lossless compression method basing on statistic characters is not fit for running data in NPP. Run-length coding and differential coding method has the best performance for less changing data. This conclusion can be applied for lossless compression in control system of NPP.