摘要
以实现继电器数字算法为出发点,阐述了快速继电器动作速度与数据窗长度的矛盾。为了解决此矛盾,在实现继电器时常采用不同的算法。短数据窗算法计算速度快,长数据窗算法计算得到的数据准确度高。文中选择长数据窗的全波傅里叶算法实现继电器,保证计算过程的准确性,并简化应用在突变量继电器中的傅里叶算法。快速继电器中的比幅式过量继电器的动作方程表现为动作量大于制动量。为满足文中突变量继电器作为快速继电器的要求,根据其动作量变化特征,在制动量中引入制动系数,实时修正动作特性,以满足动作速度的要求。
By proceeding from the implementation of the digital algorithm of relays,a discussion is made of the contradiction between the action speed of rapid relays and the length of data window.In order to solve the contradiction,various algorithms are adopted for relays.Short data window algorithms are fast and long ones are accurate.The long data window full wave Fourier algorithm is selected to ensure the accuracy of the calculation and simplify the Fourier algorithm used in variation relays.The operation equation of amplitude comparison relays of rapid relays is expressed as the operating value being greater than the braking value.To meet the requirement on the variation relay to serve as the rapid relay,the braking coefficient is introduced into the braking value according to the variation features of the operating value to correct the operation characteristics in real-time so as to meet the requirement of action speed.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第20期74-77,共4页
Automation of Electric Power Systems
关键词
傅里叶算法
数据窗
突变量
动作特性
数字式继电器
Fourier algorithm
data window
variation
operating characteristics
digital relay
