2009•Power System Protection and ControlOpen access
Review of electric energy metering system
Ning Wei-hong
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Abstract
This paper looks back the developing history and theory of electric energy metering device based on the transformer,metering meter and secondary interface,views the developing trend of electric energy metering device of 21st Century and points out that the developing inexorable trend of present power metering system is digitalization,intellectronics,standardization,sytematize and network.Also,it introduces some new types of transformers,including Rogowski photoelectric current transformer,Faraday magnet optical effect transformer and optics voltage transformer,electric energy metering devices for special purpose,containing single-phase electronic multi-rate electric energy meter,three phase pre-pay electric energy meter and digital electric energy meter,and some usual metering chips.