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This letter proposes a fast approach to calculate the power oscillation peak value on AC tie-line after HVDC commutation failure. The proposed approach does not require modeling power system components in detail for dynamic simulation and is especially suitable for practical bulk power systems. It is useful to help operators rapidly assess the system stability margin after commutation failures. The...
Based on recording the inputs and outputs of control systems and its control modules and control blocks during on-site disturbance experiments and tests, an abnormal signal analysis based method for locating oscillation source in control blocks is proposed by intensively comparing the differences between the ideal standard responses and the actual response of a control system and its control modules...
Wind power is a random and intermittent energy source, wind farm output prediction accuracy is not yet able to meet the purpose of engineering applications. In recent years, with the large-scale wind power integration, because of the randomness and volatility of wind power output, the active power of system node fluctuates severely, which greatly increases the difficulties in controlling the grid...
This paper aims at the present difficulties to regulate the frequency difference and voltage difference automatically when doing power grid parallel operation in substation, and applies the back-to-back voltage source converter to the power grid synchronization parallel based on the theory of active power frequency and reactive power voltage in power system. The core of the power grid synchronization...
Considering the close relationship between commutation failure of HVDC and the voltage at inverter side, this paper studies the method to improve converter commutation performance with the help of SVC. In order to overcome the drawback of single-object control and further reduce the probability or commutation failure duration of HVDC system, the signal of AC line current as a supplementary control...
Based on eigenvalue analysis of small signal stability analysis, mechanism of large power oscillations of inter-area lines caused by local mode is studied by right eigenvector characteristic and generator power-angle characteristic. Eigenvalue of local mode is changing with running conditions and relations between the elements of right eigenvector of all generators also are changed. When power deviations'...
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