Mathematical modeling of processes of automatic frequency and power control in IPS with solar power plants

Dryomin I.V., Cand. Sci. (Eng.), Senior Researcher
Institute of General Energy of the National Academy of Sciences of Ukraine, 172 Antonovycha St., Kyiv, 03680, Ukraine
Language: Russian
Source: Problemy zahal`noi enerhetyky - The Problems of General Energy, 2016, 1(44):10-17
Section: Mathematical modeling of energy facilities and systems
UDC: 621.316.726
Received: 15.03.2016
Published: 13.04.2016
Abstract: The unstable nature of solar power plant (SPP) power output in the network determines the need for a comprehensive study of the relevant control processes and their impact on the operation of the power system, especially from the point of view of influence of processes of generation capacity in the SPP on the frequency, and on the relevant processes of automatic frequency and power control (AFPC).
The mathematical model of the generation processes on the SPP included in the AFPC model allows to investigate the processes of regulation in the AFPC systems with traditional regulators (generators), and in the AFPC systems with fast controllable loads.
On the example of interconnected power system (IPS) of Ukraine presents the results of experiments with the mathematical model of the SPP given in the article. It is established that for generators-regulators is a key limitation on the speed of the power set/reset, unlike controllable loads for which key is a maximum power limitation.
It is revealed that under the condition of maximum power SPP equal to the maximum power of the generator-regulator of the power plant (3 GW) speed of the power set/reset of hydroelectric power provides effective regulation for the permissible frequency deviation of 0.02 Hz. Ceteris paribus, neither coal-fired nor oil-gas thermoelectric power station is not able to hold the frequency deviation even in the range of 0.2 Hz.
Keywords: mathematical modeling, automatic control, numerical methods, the system of nonlinear differential equations, solar power plant, generator-regulator, controllable load.
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