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Due to rapid advancements in power electronics, the utilization of electronically switched loads and nonlinear loads is increasing gradually in the electrical power system. These loads create problems of measuring instruments, when connected to the power distribution systems. In this paper, an experimental investigation has been carried out to analyze the performance of single-phase watt-hour (induction and electronic types) energy meters that are being used in Pakistan. The accuracy of the energy meters has been tested under different household nonlinear loads, at various power factors and also at different supply voltage levels. Power factor and total harmonic distortion (THD) of different household loads are also recorded in the experimental work. A hardware based experimental setup has been designed to perform the experimental work. The experimental results have been compared to Water and Power Development Authority (WAPDA) standards for energy meters. 相似文献
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文章介绍电力推进船舶电力系统谐波产生的原因及其对于船舶其他电气设备的影响。通过EDSA软件对电力系统进行建模和分析,提出谐波抑制和消除方法。以实船电力系统为例,建立了该系统的仿真模型,对于采取谐波抑制措施前后的谐波含量进行对比分析。结果表明,该方法简单可靠且快速,对于船舶的后续设计有重要指导意义。 相似文献