Real-time Correction Of Low Frequency Oscillation Control Optimization Decision Methods

This paper presents a real-time control of AC and DC low frequency oscillation overall program. Based on the results of the first-line operation mode data, through the small signal stability analysis techniques, develop control strategies of different small interfering patterns, on this basis, based on the measurement of low frequency osc illation oscillation frequency response curve extraction device grouping information and small signal stability analysis conducted pattern matching, to obtain the corresponding low-frequency oscillation mode control strategy, the use of off-line control strategy when there is a pattern matching case of failure. Presents a real-time control method to suppress the power to support low-frequency oscillation. DC power supported by simulation of the DC power support can improve the system damping; calculation method proposed DC control sensitive factor, this factor can be selected according to the best support DC power line, and a practical example of the simulation grid; DC power support for the timing, amount, and control support system oscillaion modes and other factors influence the analysis and verification. Proposed cut generators, load shedding, emergency power modulation DC system, switching capacitance de-column grid measures to eliminate small bus voltage more limited overall performance equipment overload controls for the optional filter, then through the control measures enumeration of combinations and estimate the effect of screening-based control technology, and the rest of the combination of control measures using cluster computing model for rapid quantitative assessment of the effect of control, get real-time control optimization strategies to offline control strategy and real-time control optimization strategies to coordinate additional the control can be realized on the more limited power bus voltage, overload devices fast, reliable, precise control.