GPS time service and clock calibrating device for electric power measurement

Abstract

The invention discloses an energy metering, GPS timing and clock calibrating device which comprises a singlechip, a GPS module, a liquid crystal display, and the like. Aiming at the phenomenon that an energy metering device has larger and worse real time clock errors, the device adopts the GPS technology, receives the standard clock signal of GPS through the GPS module, displays the time of the GPS on the liquid crystal display, and carries out the calibration to the real-time time of the energy metering device. The reference time provided by the GPS is utilized for providing the time calibrating reference, and greatly reducing the timing error of a watt-hour meter.

Description

technical field [0001] The invention relates to an electric energy metering and calibrating device, which is a clock calibrating device for measuring the clock fundamental frequency error of the electric energy metering device and providing GPS standard time to calibrate its real-time clock. Background technique [0002] The power system has entered the era of large units, ultra-high voltage, and cross-regional networking. Safe, stable and economical operation is an important task for the current power system. In order to achieve peak-shaving and valley-filling of power grid loads, a multi-rate electricity price policy is generally adopted at present, that is, different electricity prices are adopted in different periods / periods, such as high electricity prices during peak loads and low electricity prices during low valleys. For example, the electricity price is high during the peak load, and the electricity price is low during the trough. [0003] After a large number of o...

AI Technical Summary

Problems solved by technology

For example, in a power plant with 1 million generating units, if the clock error of its gateway meter and the standard clock error are 60 seconds, then there will be a difference of 1 minute/day for switching during peak and valley periods, and the difference in peak and valley electricity prices is 0.2 yuan/kh Calculated, the difference in electricity bill caused by one day may be as high as 3,300 yuan, and the electricity bill due to clock error at the gate of the factory may reach more than 1.2 million yuan in one year

Therefore, even a small timing error may

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