Many industrial installations in developing countries start-up as small factories, without regard for the need of compensation of reactive power, leading to significant financial losses in the long term. By improving ...Many industrial installations in developing countries start-up as small factories, without regard for the need of compensation of reactive power, leading to significant financial losses in the long term. By improving the power factor, the customer can reduce its power demand and potentially increase efficiency of their equipment. A PIC microcontroller is used to switch capacitor banks to compensate for the reactive power. In order to determine the size of the capacitor bank needed, the microcontroller calculates the phase difference between the voltage and the current. The results obtained based on the lagging power factor for three test loads show an improvement in the power factor from 0.52 to 0.96 under different test load conditions.展开更多
This article presents a comprehensive review for the dilemma of reactive power flow, while addressing different proposed remedy strategies: conventional and most update solutions. Robust analytical expressions were ut...This article presents a comprehensive review for the dilemma of reactive power flow, while addressing different proposed remedy strategies: conventional and most update solutions. Robust analytical expressions were utilized to exploit the functionality of the proposed solutions and to show clearly the relation between the reactive power and control variables. The article, moreover, proposes a simple, innovative and robust analysis for static performance of the STATCOM. This approach shows clearly the advantages of the STA-TCOM in regulating reactive power and maintaining load voltage level within presumable limits. The approach, furthermore, reveals explicitly via analytical expressions the impact of the STATCOM operation on different aspects of the power system under concern.展开更多
为了补偿较大的无功功率,降低传统的有源电力滤波器(active power filter,APF)的容量,提出将有源电力滤波器与晶闸管投切电容器(thyristor switched capacitor,TSC)相结合构成混合滤波系统。该系统充分利用APF动态补偿性能好,TSC容量大...为了补偿较大的无功功率,降低传统的有源电力滤波器(active power filter,APF)的容量,提出将有源电力滤波器与晶闸管投切电容器(thyristor switched capacitor,TSC)相结合构成混合滤波系统。该系统充分利用APF动态补偿性能好,TSC容量大的特点,有效地消除电网中的谐波电流和提高功率因数。通过仿真研究,结果验证了系统的有效性和可行性,并且表明该系统具备较好的动态响应性能和稳定性。展开更多
文摘Many industrial installations in developing countries start-up as small factories, without regard for the need of compensation of reactive power, leading to significant financial losses in the long term. By improving the power factor, the customer can reduce its power demand and potentially increase efficiency of their equipment. A PIC microcontroller is used to switch capacitor banks to compensate for the reactive power. In order to determine the size of the capacitor bank needed, the microcontroller calculates the phase difference between the voltage and the current. The results obtained based on the lagging power factor for three test loads show an improvement in the power factor from 0.52 to 0.96 under different test load conditions.
文摘This article presents a comprehensive review for the dilemma of reactive power flow, while addressing different proposed remedy strategies: conventional and most update solutions. Robust analytical expressions were utilized to exploit the functionality of the proposed solutions and to show clearly the relation between the reactive power and control variables. The article, moreover, proposes a simple, innovative and robust analysis for static performance of the STATCOM. This approach shows clearly the advantages of the STA-TCOM in regulating reactive power and maintaining load voltage level within presumable limits. The approach, furthermore, reveals explicitly via analytical expressions the impact of the STATCOM operation on different aspects of the power system under concern.
文摘为了补偿较大的无功功率,降低传统的有源电力滤波器(active power filter,APF)的容量,提出将有源电力滤波器与晶闸管投切电容器(thyristor switched capacitor,TSC)相结合构成混合滤波系统。该系统充分利用APF动态补偿性能好,TSC容量大的特点,有效地消除电网中的谐波电流和提高功率因数。通过仿真研究,结果验证了系统的有效性和可行性,并且表明该系统具备较好的动态响应性能和稳定性。
