DOI: 10.18503/2311-8318-2016-3(32)-27-38

**Abstract**

Development of objects of distributed generation in industrial systems of power supply leads to the complication of the possible set of operational and emergency modes. At emergency or planned shutdown of the feeding lines or powerful transformers of internal power plants static stability of generators can decrease in relation to standard indicators. On the basis of the modified method of a consecutive equivalent and a method of consecutive weighting the analysis algorithm of static stability of industrial generators is developed during parallel operation with a power supply system. Generator rotor angle is accepted as the parameter of weighting. This algorithm is the basis for a program complex of calculation of the set modes and the analysis of static stability of industrial systems of power supply KATPAH 9.0. On the basis of the modified method of a consecutive equivalent and a method of consecutive intervals, the algorithm of calculation of transition processes is developed. The developed algorithms and program complex make it possible to predict the postemergency set operation, to estimate static and dynamic stability of industrial generators and if necessary to develop the relevant activities. The analysis of static and dynamic stability of synchronous generators on the example of the system of power supply of the operating large industrial enterprise is provided. The closed system of power supply contains generators of various power and various electric remoteness from each other and power supply systems. Conclusions are drawn on the influence of a configuration of system of power supply on a stock of static stability in postemergency operation and dynamic stability at the change of the network configuration. Recommendations about the increase of static stability of the knot in the emergency operation are made. First of all, it is recommended to adjust the load of synchronous generators on active and reactive power in postemergency operation. The best network configuration on dynamic stability is defined. The developed program complex can be used at the stage of planning for normal, emergency and postemergency operation by the quick and dispatching personnel of power plants or groups of the modes of electrotechnical laboratories.

**Keywords**

Distributed generation, static and dynamic stability, industrial enterprise, set mode, transient regime, software, system of power supply, power line, transformer, synchronous generator.

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