摘要
计算机继电保护的算法是为了从离散的,量化了的数字量来反应连续的模拟量.各种算法的本质就是如何解决精度和速度的矛盾,所谓精度是指计算值与实际值之间的误差。速度指在计算时所需数据窗的时间长短。电力系统继电保护反应的模拟量是电压、电流,各种保护原理基本上建立在这些量都是正弦量的基础之上的.因此本文对正弦量进行了数学分析,揭示了Mann-Morrison算法与采样值积算法的内在关系,得出采样值联立求解算法公式。这种算法具有所需数据窗的时间短、计算精度高和不受系统频率偏差影响的优点。
The intrinsic quality of various algorithms used in computer relay protection is to solve the conflict between the calculation precision and calcuating speed. The so called precision is represented by error between calculated value and physical value and the so called speed is calculated by time which a data window occupies. Analogue values of voltages and currents responsed by power system relay protection are generally based on sine-shaped values. This paper uses mathematical methods to analyze these sine-shaped values and reveals the inner relationship between samples accumulated algorithm and the Mann- Morrison algorithm. The formula for solving the simultaneous equations of sampled data is also deduced. This algorithm needs shorter data window time and has higher calculation precision and is not affected by deviation of power frequency.
出处
《电力系统自动化》
EI
CSCD
北大核心
1990年第5期29-32,共4页
Automation of Electric Power Systems
