Improving The Algorithm Of Power Station Unloading Automation In Case Of Fault

This article analyzes the existing methods for determining the effects of faults, which are used in starting elements for instability prevention automation. Such a starting element is the power station unloading automation in case of fault. Currently, several methods for determining the the effects of faults have been used in this automation. Algorithms by the positive-sequence active power shedding of generating units relative to the power of prefault condition are most often found in emergency control devices and have certain advantages over the method of determining the effects of faults by the positive-sequence voltage on the station bus. But even such algorithms can lead to redundancy of action adjustments. An approach is proposed to improve these algorithms in order to minimize the redundancy of them. The section “Algorithm Development” contains structure, basic principles of operation and functional diagrams of the proposed solutions. Finally, an assessment of the effect of introducing a more accurate account of the areas of stable state of power plants is given.