Get Analysis and Damping Control of Power System Low-frequency PDF

By Haifeng Wang, Wenjuan Du

ISBN-10: 1489976949

ISBN-13: 9781489976949

ISBN-10: 1489976965

ISBN-13: 9781489976963

This e-book provides the learn and improvement effects on strength platforms oscillations in 3 different types of analytical tools. First is damping torque research which used to be proposed in 1960’s, extra built among 1980-1990, and commonly used in undefined. moment is modal research which built among the 1980’s and 1990’s because the strongest process. eventually the linearized equal-area criterion research that's proposed and constructed lately. The publication covers 3 major different types of controllers: strength procedure Stabilizer (PSS), proof (Flexible AC Transmission structures) stabilizer, and ESS (Energy garage platforms) stabilizer. The e-book offers a scientific and unique advent at the topic because the reference for functions and educational examine.

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Haifeng Wang, Wenjuan Du's Analysis and Damping Control of Power System Low-frequency PDF

This ebook provides the examine and improvement effects on energy structures oscillations in 3 different types of analytical tools. First is damping torque research which was once proposed in 1960’s, extra built among 1980-1990, and conventional in undefined. moment is modal research which built among the 1980’s and 1990’s because the strongest approach.

Additional info for Analysis and Damping Control of Power System Low-frequency Oscillations

Example text

58) is as follows: zi ðtÞ ¼ zi ð0Þeki t ; i ¼ 1; 2; . ; M ð2:59Þ where zi ð0Þ is the initial value of state variable zi ðtÞ; i ¼ 1; 2; . ; M. From Eqs. 59), it can have 2 z1 ð0Þek1 t 6 z2 ð0Þek2 t 6 X ¼ V6 .. 4 . 3 7 7 7 5 ð2:60Þ zn ð0ÞekM t Hence, time response of the xk ðtÞ; i ¼ 1; 2; . ; M, is as follows: kth state variable xk ðtÞ ¼ vk1 z1 ð0Þek1 t þ vk2 z2 ð0Þek2 t þ Á Á Á þ vkM zM ð0ÞekM t ¼ of M X the system, vki zi ð0Þeki t i¼1 ð2:61Þ Obviously, the time response of system state variables is decided by the eigenvalues of state matrix Ao .

53), it can be obtained that sZ ¼ KZ þ WT bo u ð2:56Þ y ¼ cTo VZ That is szi ¼ ki zi ; þ wTi bo u y ¼ cTo M X i ¼ 1; 2; . ; M ð2:57Þ vi z i i¼1 According to Eq. 57), the system can also be shown in Fig. 12. This is the modal decomposition representation of state-space model of open-loop system. w1T b 0 1 s − λ1 z1 w 2Tb0 1 s − λ2 z2 u c0 T v1 c0 T v 2 + w M Tb0 1 s − λM zM y c0 T v M Fig. 2 35 Stability of Open-Loop System and Closed-Loop System Considering the open-loop system when u ¼ 0, the state-space representation of Eq.

59), it can have 2 z1 ð0Þek1 t 6 z2 ð0Þek2 t 6 X ¼ V6 .. 4 . 3 7 7 7 5 ð2:60Þ zn ð0ÞekM t Hence, time response of the xk ðtÞ; i ¼ 1; 2; . ; M, is as follows: kth state variable xk ðtÞ ¼ vk1 z1 ð0Þek1 t þ vk2 z2 ð0Þek2 t þ Á Á Á þ vkM zM ð0ÞekM t ¼ of M X the system, vki zi ð0Þeki t i¼1 ð2:61Þ Obviously, the time response of system state variables is decided by the eigenvalues of state matrix Ao . If there is one or more eigenvalues on the right-hand half of the complex plan (the real part of eigenvalue is equal to or greater than zero), the system is unstable.

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Analysis and Damping Control of Power System Low-frequency Oscillations by Haifeng Wang, Wenjuan Du


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