Análise dos Impactos Provenientes da Instalação de Bancos de Capacitores na Fronteira com a Rede Básica
Keywords: Power Capacitor, Electromagnetic Transients, Circuit Breaker, Transient Recovery Voltage, Power Factor
AbstractThe continuous verification of performance indicators and the minimum technical requirements required by the regulation of the electricity sector aim to list conditions that may affect the operation of the electric power system and the performance of its equipment. The power factor, although monitored in steady state, provides an increase in electromagnetic transients in that system due to the switching of capacitor banks with the objective of providing adequacy of its value range. In this way, it is proposed to determine a range of capacitive reactive power values that allow not exceeding the reference values assigned to the steady state voltage of the power system, to the energizing transients of the shunt capacitor banks and the transient recovery voltage in the circuit breakers adjacent to the busbar at 138 kV from the secondary of 2 basic network transformers at voltages of 440kV and 500 kV. The analyzes involved 2 load level scenarios. In view of the model used and the conditions simulated in ATPdraw computer program, the capacitor banks of 20 MVAr, 40 MVAr and 60 MVAr allowed to achieve the proposed objectives.