Optimal Approach to Photovoltaic Electricity Injection in an Unstable Grid: Case Study Seydou

The injection of photovoltaic electricity into the distribution grid has harmful impacts on the electrical grid which limits this injection and causes the malfunction of the electrical grid.This is why it is necessary to seek the optimal power of photovoltaic electricity to be injected into the interconnected grid already unstable.The site considered for this study is the 33 MW photovoltaic power plant of Zagtouli which must inject its electricity production into the national interconnected grid of Burkina Faso, from the Zagtouli substation located in Ouagadougou.In the NEPLAN software, the scenario adopted consisted in varying the power of the photovoltaic electricity injected at the injection point of the Zagtouli substation until an overload of one or more elements of the network was observed.The simulation results showed that the maximum power of photovoltaic electricity that can be injected at the Zagtouli substation is 20 MW and those, without regulating the voltage of the unstable network.For photovoltaic powers between 20 MW and 70 MW, voltage and active power regulation are necessary.The results of this study can be used to optimize the injection of electricity from photovoltaic power plants into the interconnected national electricity grids of West African countries, which are experiencing the same instability problems as the national interconnected network of Burkina Faso.