METHOD FOR CONTROLLING COMPOSITION AND LOADING OF GENERATORS OF A POWER PLANT WITH OWN LOADS, OPERATING IN ISOLATION AND IN PARALLEL TO A RECEIVING POWER SYSTEM Russian patent published in 2019 - IPC H02H7/08 

FIELD: power engineering.

SUBSTANCE: use: in electric power engineering. In parallel mode of power plant with receiving power system for planned interval of constancy of composition of generators included into operation, maximum load of power plant is predicted, composition of the generators connected to operation is determined and put into operation, which is necessary for its coverage, as well as output to the receiving PS of surplus capacity. Part of generators is switched to mode of constant power output with total power equal to maximum allowed for transmission to receiving power system. Other part is switched to the group control mode or to the control mode with share participation in power of the master generator. Power control of said generators is carried out based on the condition of equality of power transmitted to the receiving power system and total power of the other connected generators not included in the number of generators of group control. In case of prohibition of parallel operation, generators are unloaded to level of zero overflow in receiving power system and switches are disconnected in fixed section of electric connections of power plant with receiving power system, generators of power plant are switched to frequency control mode. In case of disturbance of electric connections of power plant with receiving power system or normal mode, switches are cut off in fixed cross section of electric connections of power plant with receiving power system with simultaneous disconnection of generators operating with constant load. Adjust power of remaining generators of power plant in frequency control mode. When the prohibition for parallel operation is removed and conditions for normal mode are restored, the power plant is restored to restore the mode of parallel operation of the power plant to the receiving power system, the required composition, loading and modes of controlling power of generators of both sets of generators are restored.

EFFECT: power plant output of maximum available or maximum permissible power for transmission to the receiving power system without reduction of reliability of power supply of own consumers and operation of the power plant itself.

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