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An Adaptive Zone-Division-Based Automatic Voltage Control System With Applications in China

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5 Author(s)
Hongbin Sun ; Dept. of Electr. Eng., Tsinghua Univ., Beijing, China ; Qinglai Guo ; Boming Zhang ; Wenchuan Wu
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The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but, here, both secondary voltage control (SVC) and tertiary voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

Published in:

Power Systems, IEEE Transactions on  (Volume:28 ,  Issue: 2 )

Date of Publication:

May 2013

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