Currents vary greatly, a shorter cycle, using the traditional power meter for measuring the load impact

As related to the electricity metering side and the supply side of the interests of the field of an electric power system has been widely concern. At present, the impact load on the power grid is widespread, such as rolling mills thyristor power supply technology used in the rolling mill, single phase welding machines, etc., this load at work, the current has changed dramatically, shorter cycle, using the traditional power meter to shock loads to be measured, often appear larger error,  mcb circuit breaker  side and the user side there is a big discrepancy metering of electricity, and the resulting energy metering chaos, triggering energy metering disputes. Therefore, the analysis of impact load on the electric energy metering, and using digital Voltage stabilizer  energy measurement error resulting quantitative analysis of the production site for the estimation of the actual energy measurement error, improving electronic energy meter design, reducing its  power transformers , has a certain practical significance. Mathematical model of impact load in order to analyze the impact of the load on the electric energy metering, you first need to establish the mathematical model of impact load, in this paper, in order to supply technology using thyristor mill example for analysis.