Abstract
The article present results of studies aimed at emergency control methods development in power supply systems equipped with distributed generation plants. The main purpose of emergency control is ensuring postemergency mode dead-beat stability and high quality of dynamic transitions for electrical network load-shedding. Control actions were formed by changing the vector of controlled parameters along a path corresponding to the shortest distance to the hypersurface of the limit modes. The dynamic processes quality when implementing the control actions was ensured based on the special settings of excitation and frequency automatic regulators. Based on computer-aided modelling, it is shown that the effective in-troduction of a postemergency mode to the stability region can be performed based on generalized equations of the limit loads while using the start algorithm ensuring mode’s entering the stability region’s neighboring boundary. The application of the fuzzy control algorithms for tuning regulators allows formation of a qualitative dynamic transition while load-shedding distributed generation plants in the postemergency mode.
Highlights
One of the goals of emergency control (EC) [1,2,3] systems application is to ensure the static stability of postemergency modes (PEM) of electrical power systems (EPS)
It should be noted, that optimal control requires adjusting the tuning of automatic excitation regulators (AER) and automatic regulator of rotor speed (ARRS) when significant changes are introduced in the operation modes of both distributed generation (DG) plants and power supply grids and systems (PSS)
When DG plants operate without regulators, the system loses stability, in case one of connections with infinite buses is cut off
Summary
One of the goals of emergency control (EC) [1,2,3] systems application is to ensure the static stability of postemergency modes (PEM) of electrical power systems (EPS). Due to introduction of distributed generation (DG) plants in the immediate future, the modes introduction to the stability region becomes urgent for distribution networks and power supply grids and systems (PSS). It acquires special importance in networks equipped with DG plants, implemented on the basis of non-traditional renewable energy sources (NTRES) [4,5,6,7,8,9]. As mini hydropower plants and offshore windmill farms can be removed from the consumption centers, which leads to a 'narrowing' of the areas of static dead-beat stability
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