Correlation of power variables |
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| Institution: | 1. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China;2. School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China;3. State Grid Liaoning Electric Power Co. Ltd., Shenyang 110006, China;1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing 210016, China |
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| Abstract: | Cross correlation functions between input power fluctuations and system power fluctuations are derived for a Gaussian process and sine wave process. These cross correlation functions are referred to as power correlations and they contain both a constant term plus a fluctuating quantity. The derivations show that for a linear system with no uncorrelated noise normalized correlations of squared fluctuations between the input and output should be equal to one. Experimental data obtained from tests on an electrical circuit validated analytically derived power correlation formulas. Power correlation functions can be used for determination of propagation times, for power transmission, and for other applications such as resonance testing. |
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