IDENTIFICATION OF STATE CLASSES OF STAND-ALONE POWER SUPPLY SYSTEM TO CONTROL ITS MODE OF PARALLEL OPERATION WITH CENTRALIZED ELECTRICAL NETWORK

PURPOSE. A complex of automatic equipment has been created and is being tested. It is designed to provide the normal and emergency mode control of the stand-alone power supply systems with distributed generation that operate in parallel with the centralized electrical network. Automatic control of the objects with small generation operating in parallel with the network requires the solution of the identification problem of their state classes. METHODS. The proposed solution method of the specified problem is based on the identification of the main structural and mode properties of district power systems and their representation in the form of logical variables and equations. It is universal and does not depend on the facility circuit. RESULTS AND THEIR DISCUSSION. The paper presents a logical basis of the identification algorithm of the state classes (structural-mode state identification) of the district stand-alone system of power supply used by an automatic operator. The reasons and criteria for the classification of the system states are proposed as well as a mathematical model for class state determination. The solution of the identification problem of state classes has been demonstrated on example of a stand-alone power supply system of a residential district, which is built on the basis of a cogeneration gas-piston power plant. Solution of the problem has been verified using an emulator program. CONCLUSIONS. Innovative automation equipment for small generation with an automatic operator ensuring parallel operation of a district stand-alone power supply system with the centralized electrical network are expected to be implemented in a pilot project at one of the energy facilities of the city of Novosibirsk. This will significantly (by several times) reduce the cost of connecting such objects to the network and improve their efficiency reducing losses in networks.

small generation, parallel operation with the electrical network, mode and emergency automatic equipment, identification, state classes, automatic structure-mode operation

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