Control of reactive power flows by means of distributed generators

Methods. The algorithm used for modeling consists of several stages: first, random variables rk and xk are set, which remain constant at all subsequent stages of modeling. For each case, a random value of loads and generation is set and a system of equations is solved to determine the voltage levels along the line and total losses.

Results. The article describes the relevance of the topic, considers the features of the influence of active and reactive power regulation on the steady-state modes of the electrical network. For modes 3 and 4, the entire part of the curve from the extreme left point (corresponding to the best power quality) to the point of reaching the global minimum (when losses are minimal) represents a possible area where a compromise can be found between loss reduction and voltage drop by adjusting K. Comparison of different modes shows that maximum flexibility is achieved in mode 4, when high penetration of renewable energy sources leads to overproduction of electricity.

Conclusion. Summarizing the simulation results, it can be said that the reactive power flow control scheme on distributed PV grid inverters is quite simple and effective. Reactive power flows are controlled according to local values of active and reactive power consumption. The scheme contains one generalized adjustable parameter for balancing between local demands in order to minimize the power flow and maintain a good level of power quality.

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