Research On Measures Which Enhance Accuracy Of Energy Metering

Electric energy is main energy source of country economy and people's life,electric energy metering deal with generation,power supply and power consumption. Under the condition of marketing economy,improving the accuracy of electric energy metering is of most importance.In the modern power system,acute fluctuation of load lead to great difference of wave crest and trough,abundance non-linear load make severe aberrance of current and voltage wave.These factors make remarkable increase of error of energy metering and unrational billing.This thesis analyses the present situation of energy metering in BiShan network and some network at home,main factors which lead to inaccuracy of energy metering are dissected and the severity degree are pointed out.The method of enhancing accuracy of metering using modern technique are put forward which including:1)modernization of meter,replacing the induction watthour meter with fullelectronic watthour meter;2)put real time change of mutual inductor ratio of transformation intoconsideration,method on real-time computation are presented.3)using full electronic watthour meter to measure fundamental power andharmonic power separately and discussing idea of billing on harmonic.Aiming at the reality of BiShan network,the way of enhancing accuracy energy metering and scheme of building modernized manage system of energy metering are put forward.