Effect of standby mode operation of some household appliances on disturbance voltage and current in frequency range of 9–150 kHz produced by other equipment in low voltage network
Most household appliances commercially available today on the market are equipped with the inverter technology favoring to its smaller size, advanced performance, and energy efficient. Notwithstanding its benefits, unfortunately, this technology may introduce current disturbance according to its relevant frequency switching and eventually degrades power quality. The switching frequency of inverter for household appliances is generally in the range of 9-150 kHz causing the disturbance and may influence the working performance of other appliances. The voltage and current disturbances in the frequency range of 9-150 kHz are not completely covered and currently subject to standardization work. Some household appliances can be operated in standby mode in order to display the time and setting information or to allow them to operate quickly even though it also gives a drawback regarding to its energy consumed. This study investigates the characteristics of standby mode operation of some appliances and its effect to the voltage and current disturbance in the frequency range of 9-150 kHz. The result shows that the standby mode operation of particular household appliances can filter and significantly reduce the voltage and current disturbance in the low voltage (LV) installation network for specific frequency in the range of 9-150 kHz.
The mutual influence of appliances on the disturbance in the frequency range of 9–150 kHz produced by household appliances in the low voltage network
Nowadays, the inverter technology is widely used in household appliances. This technology may generate disturbance in the frequency range within 9–150 kHz due to its frequency switching. In the shared low voltage network, many appliances can be connected and operated simultaneously causing the interaction between appliances. The disturbance produced by appliance may influence the working performance of neighbor appliances in the shared network. In the other hand, the neighbor appliances may also affect the disturbance produced by appliance in the network. This study is focused on observing the effect of neighbor appliance to the disturbance produced by appliance in the shared low voltage network. The appliance used as the disturbance source is induction cooker while inverter based microwave, conventional microwave, personal computer, television and water cooker are used as the neighbor appliances. The result shows that the neighbor appliance may either increase or decrease the disturbance appeared in the network. The neighbor appliances affect the disturbance through their two properties, the power consumption and internal impedance.
High frequency distortion in power grids due to electronic equipment
Power quality is a subject that has received a lot of attention during the last 10 to 20 years, both in industry and in academia. Power quality concerns interaction between the power grid and its c ...