The Qnx Embedded Real-time Operating System In The Power System Phasor Measurement Unit

As the need for reliability and real-time in industry area grows very fast recently,the real-time operation system gets more attention than before. The paper describes how to use QNX as the platform in project PAC-2000. The power system in China expands very quickly and its operation is becoming more and more complex, On the other hand, the demand for higher reliability and power quality is increasing. For these reason phasor measurement technology becomes the hottest field in the electic power system. Phase measurement unit is the basic device of Wide Area Measurement system, for it must provide the phasor data to the control center reliably and correctly. The phasor measurement technology has been used in China for several years, the paper was written during the author took part in PMU developing group in CEPRI. In 2003. This paper includes: 1) The history, constitution and application of phasor measurement technology 2) How to use QNX in the PMU...