Power Quality Improvement of a Distribution Network for Sustainable Power Supply

Abstract

This paper presents a heuristic technique for improving the voltage profile and reducing power loss in a distribution network. These components are to be maintained at a certain standard to boost the electricity supply power of a distribution network. The shunt capacitor placement technique is applied to achieve a sustainable electric power supply. The issue of power loss has been a major threat to the distribution network. A distribution network is expected to operate at a certain voltage level to meet consumers’ energy demand. Power flow studies have been conducted using Newton Raphson’s technique on the 30 bus, 11 kV Onuiyi-Nsukka distribution network. It was found that the voltage profile on buses 19 and 26 was critically violated with voltage amplitudes of 0.72 pu and 0.79 pu respectively. The feeder power quality was improved using a shunt capacitor placement technique and the installation of a 1200KVAr shunt capacitor to keep bus voltage amplitudes within the legal limit of (0.95-1.05) pu. The voltage profile, active and reactive power losses on the network were determined. Active power loss and reactive power loss are reduced from 0.27MW to 0.12MW and 0.76Mvar to 0.14Mvar, respectively. Therefore, the distribution network voltage profile is improved and the power loss on the network significantly reduced.

Output performance evaluation of the automatic voltage regulator system on pre-filter control technique

“…This justifies the reason why an integral control helps in the reduction of the steadystate error, even though it may worsen the transient response. The integral term is calculated as (2).…”

“…In the power system, where synchronous machines are largely employed for generating and subsequent transmission of electrical energy to connected loads, the system must operate in steady-state conditions. There is a continuous application of constant load which varies and causes a reduction in both voltage and current magnitude that leads to power losses on the power grid [2]. These load changes that require coordinated means can be achieved through automatic excitation using an AVR stabilizes the power system voltages [3].…”