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《Automation of Electric Power Systems》 2003-14
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OPTIMAL IMPLEMENTATION OF POLYGON IMPEDANCE CHARACTERISTICS USING DSP TECHNIQUE

Lin Xiangning 1, Liu Pei 1, Jing Rong 2 (1. Huazhong University of Science and Technology, Wuhan 430074, China) (2. Yantai Electric Power Bureau, Yantai 264001, China)  
How to choose the expression of the criterion when the protection function is implemented with the DSP chip is discussed in this paper. The computing complexities of DSP are analyzed when the polygon impedance characteristics of distance protection are realized with three types of criteria, i.e., the phase angle comparative criterion, magnitude comparative criterion, and direct comparative one. It has been proved that the protection algorithm should be optimized to reduce the unnecessary occupation of the hardware resource although the development of hardware provides higher redundancy for the implementation and choice of the protection algorithm. Thus, the aggregate reliability level of the protection device can be improved.
【CateGory Index】: TP332
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