Impedance analyzing method for sub-synchronous oscillation of thermal power unit
A technology of subsynchronous oscillation and thermal power units, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc.
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[0112] The present invention will be further described below in conjunction with accompanying drawing.
[0113] The invention mainly relates to a novel impedance analysis method and a new criterion proposed to adapt to the new method. Based on the basic principle of the impedance analysis method, this method uniformly models the model of the power supply part of the thermal power unit in the form of state space. Nanofunction matrix) form to be modeled. Therefore, compared with the traditional frequency sweep, the system impedance / admittance obtained by the new impedance analysis method will be more accurate. At the same time, based on the state space model, the calculation accuracy of the new impedance analysis method is the same as that of the eigenvalue analysis method, but it can analyze the dynamic characteristics of continuous frequencies, while the eigenvalue method can only obtain the dynamic characteristics of isolated points (at the eigenvalue frequency).
[0114] T...
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