DOI:10.35833/MPCE.2018.000693 |
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Analysis of Dynamic Voltage Fluctuation Mechanism in Interconnected Power Grid with Stochastic Power Disturbances |
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Page view: 127
Net amount: 948 |
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Author:
Yiping Yu1,Ping Ju1,Yan Peng2,Boliang Lou2,Hongyang Huang2
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Author Affiliation:
1.College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China;2.State Grid Zhejiang Electric Power Corporation, Hangzhou 310014, China
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Foundation: |
This work was supported by the National Natural Science Foundation of China (No. 51837004) and the “111” Project of “Renewable Energy and Smart Grid” (No. B14022). |
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Abstract: |
With the integration of large-scale renewable energy and various new types of loads, the stochastic fluctuation characteristic of the power has seriously affected the secure and stable operation of interconnected power grids. In addition to active power fluctuations of AC tie-lines that have been studied in the past, the problem of dynamic fluctuation of bus voltage is also increasingly prominent. Firstly, the typical power fluctuations of electric railway traction load, smelting load, and wind power generation in modern power systems are presented and the accompanying voltage fluctuations are analyzed. Secondly, the dynamic fluctuation mechanism and distribution characteristic of the system voltage under special forced oscillation and generalized forced oscillation are studied. It is found that when the periodic disturbance induces a special forced oscillation, the voltage fluctuation has the same mode information compared to the power angle fluctuation. And it also has obvious peak characteristics near the natural frequency. When the stochastic disturbance induces generalized forced oscillation, the voltage fluctuations can be decomposed into proportional and resonant components according to its frequency domain characteristic. Finally, the above conclusions are verified by the simulation results of an IEEE 4-generator 2-area system. |
Keywords: |
Stochastic power disturbance ; dynamic voltage fluctuation ; special forced oscillation ; generalized forced oscillation ; dynamic fluctuation mechanism |
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Received:October 18, 2018
Online Time:2020/03/02 |
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