Simple power system emergency control method considering damping

Abstract

The invention discloses a simple power system emergency control method considering damping action, which comprises the following steps: presupposing disturbance which will cause serious impact to thesystem, performing time domain simulation calculation on the disturbance; For the unstable system, according to the time domain simulation results, the damping, power angle, angular velocity, mechanical power, electromagnetic power and inertia time constant of the generator during and after the fault are obtained. The control time T1 is determined, and the damping, inertia time constant, power angle, angular velocity, mechanical power, electromagnetic power and power angle at the unstable equilibrium point of the generator are obtained through the time domain simulation results. Emergency control quantities corresponding to the simple power system under the fault are calculated. According to the time domain simulation results, the corresponding emergency control quantities of the simple power system in the current fault mode are calculated offline.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a simple power system emergency control method considering system damping information. Background technique [0002] With the rapid development of modern power systems in the direction of ultra-high voltage, large capacity, AC-DC hybrid interconnection, etc., as well as the rapid growth of loads, the dynamic characteristics of modern power systems such as coherence, instability modes, and key transmission sections have become increasingly complex. The "three lines of defense" is the successful experience of long-term safe and stable operation of my country's power grid. The second line of defense is to ensure that the power grid can continue to maintain stable operation in the event of a serious failure by taking necessary measures such as machine cutting and load shedding. State, and the strategy table is the core and foundation of the second line of defense. ...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing off-line or online stability control calculation strategy, for unstable accidents, it is necessary to repeatedly give cut-off control measures based on experience to try out an effective cut-off control scheme, and the setting of each scheme needs to go through multiple Simulation calculation, for a large number of fault samples and combinations of operating conditions, this method will consume a lot of time and manpower

At the same time, the current emergency control algorithm does not consider the effect of system damping, which will lead to a large emergency control amount

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