微机保护中提高测量精度的算法研究

Research on the algorithms for improving the measurement precision in microprocessor-based protection

随着测控一体化继电保护装置的广泛应用,提高保护装置的测量精度是一个十分重要的问题。除硬件上采取的措施外,介绍了几种通过软件来提高微机保护装置测量精度的算法。根据这些算法开发出了基于Motorola32位单片机的微机线路保护装置,经电力系统模拟试验,能够满足电压、电流、有功及无功的测量精度要求,证明了算法的工程实用价值。

As the microprocessorbased relaying protection equipment with measuring and controlling performence applys more and more widely, it is important to improve the measurement precision of the equipment. In this paper,several algorithms for improving the precision in the design of microprocessorbased protection are presented in detail. The protection apparatus using the proposed algorithms based on Motorola 32bits microprocessor has been developed. It has been demonstrated by experiments that the measurement precision of voltage, current, active power and reactive power is satisfying, and that the algorithms have practical value in engineering.