0.2S-class three-phase power meter based on wide-range synchronous measurement and measurement method thereof

Abstract

The present invention discloses a 0.2S-class three-phase power meter based on wide-range synchronous measurement. The power meter comprises a central processing unit, an analog-digital converter, and a field-programmable gate array, a digital signal processor, a storage, a constant-temperature crystal oscillator and a clock chip which are connected with the central processing unit, the field-programmable gate array is connected with the digital signal processor, the field-programmable gate array and the digital signal processor are connected with the analog-digital converter, and the central processing unit is configured to externally connect with the clock synchronizing system taking the pulse per second as the standard or the IEEE 1588 protocol clock system of an intelligent substation. The present invention further discloses a method for measurement of a traditional transformer substation and an intelligent substation through adoption of the 0.2S-class three-phase power meter based on the wide-range synchronous measurement. The 0.2S-class three-phase power meter based on wide-range synchronous measurement and the measurement method thereof can perform synchronous measurement of instantaneous values of electrical parameters to satisfy requirements of wide-range measurement.

Description

technical field [0001] The invention relates to substation electric energy measurement and measurement equipment state monitoring technology, in particular to a 0.2S-level three-phase electric energy meter based on wide-area synchronous measurement and a measurement method thereof. Background technique [0002] At present, relevant research and application of metering device status monitoring and evaluation have been carried out in China. These researches and applications are generally implemented based on the electricity collection system and online monitoring equipment of the metering device. In specific applications, the RS485 interface is used to communicate with the broadcasting of the electric energy collection terminal. Timing technology, the timing accuracy can only reach 1s, and the synchronization of electrical parameter collection time is poor. It is not possible to use parameters such as voltage, current, and phase to analyze the status of PT, CT and related lines...

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Problems solved by technology

How to improve the time synchronization of electrical parameter acquisition has become a problem that people generally pay attention to. However, there is no corresponding equipment and no related reports.

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