Comparison of Bus Frequency Models for Power System Electro-mechanical Simulations

2017 2nd Asia Conference on Power and Electrical Engineering

能源学;电工学

Li, Changgang^1 ; Yu, Yawei^1 ; Sun, Yanli^1

Key Laboratory of Power System Intelligent Dispatch and Control, MOE China, Shandong University, Ji'nan, China^1

关键词: Amplitude frequency;    Difference method;    Electromechanical simulations;    Ideal function;    Numerical accuracy;    Numerical computations;    Phase-frequency characteristics;    Trapezoidal methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/199/1/012115/pdf
DOI  :  10.1088/1757-899X/199/1/012115

来源: IOP

【 摘 要 】

With more and more frequency-related devices interconnected into power grid, accurate frequency estimation becomes important for power system electro-mechanical simulations. This paper reviewed the methods for calculation of bus frequency including difference method, difference method with low-pass filter. Trapezoidal method and damping trapezoidal method which are commonly used in numerical computation are also discussed in this paper for the calculation of bus frequency. In order to analyze advantages and disadvantages of these methods in the aspect of numerical accuracy and stability, a comparison is made on their amplitude-frequency and phase-frequency characteristics. Voltage angle samples from both ideal function and numerical simulation are provided to test the performance of these methods on estimating bus frequency.