Three-phase electric energy meter based on wide-area synchronous measurement and measurement method thereof

Abstract

The invention discloses a three-phase electric energy meter based on wide-area synchronous measurement. The three-phase electric energy meter comprises a central processor, a synchronous measurement electric energy metering module, a memory, a constant temperature crystal oscillator and a clock chip, and the synchronous measurement electric energy metering module, the memory, the constant temperature crystal oscillator and the clock chip are connected with the central processor; the central processor is used for externally being connected with a clock synchronization system, a second pulse of which is a benchmark, or an IEEE 1588 protocol clock system and for checking and keeping the time with the clock system, and the central processor is also used for sending an automatic synchronization sampling command to the synchronous measurement electric energy metering module and processing sampled data; the synchronous measurement electric energy metering module is used for metering electric energy and for synchronously collecting a plurality of continuous voltage current instantaneous data of each path in a whole net and storing the continuous voltage current instantaneous data; the memory is used for storing data processed by the central processor; the constant temperature crystal oscillator is used for cooperation with the central processor to carry out time keeping; and the clock chip is used for providing a work clock for the central processor. The invention further discloses a measurement method of the three-phase electric energy meter based on the wide-area synchronous measurement. Instantaneous values of electrical parameters can be synchronously measured, and requirements of the wide area measurement can be met.

Description

technical field [0001] The invention relates to substation electric energy measurement and measurement equipment state monitoring technology, in particular to a 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 and equipm...

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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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