Identification and quantification of the regulation interaction between two DSTATCOM in a distribution grid

Nowadays, the different plans for the promotion of renewable energy and generation processes are stimulating the appearance of distributed generation units in the distribution system. For example the Distributed Energy Resource ”DER” (once of the United States´s energy department program) focuses these sources as vital components in the future of the generation and supply of the electric power system. These new technologies, integrated in the classic distribution lines witch are controlled by simple voltage regulators (On Load Tap Changers OLTC, banks of capacitors, etc.), produce several problems of power quality. The most important problem appears when the voltage regulator cannot generate an instantaneous reactive power when the system energy demand increases or decreases. The consequence will be that the voltage values exceed the established limits.