equipment selection and sampling precision calibration methods about power plant generator-transformer unit system electrometric circuit
auxiliary power electrometric metering circuit
automatic load dispatching system
relevant improving measures are discussed to improve understanding of smart meters and automatic calibration methods to better acquire advanced calibration methods and use new equipments and technologies
which made electrometric metering circuit safe and reliable operation are guaranteed
high accuracy requirements of electrometric metering circuit of big generating units are met.