Double CPU electric energy quality monitoring device based on DSP and ARM

Abstract

The invention provides a double CPU electric energy quality monitoring device based on a DSP and an ARM, comprising a parameter collection module and a data processing module. The parameter collection module comprises a voltage current transformation circuit, a zero-cross detection circuit, a phase-locked loop circuit, a low-pass filtering circuit and an A/D converting circuit. The data processing module comprises a DSP engineering module and an ARM engineering module. The parameter collection module is mainly responsible for collecting the voltage current signal of a power grid in real time, and sending the collected signal to a DSP through the A/D converting circuit. The DSP engineering module is responsible for calculating a plurality of electric energy quality parameters after receiving the data, and then transmitting the calculated electric energy quality data to the ARM engineering module through a double port ARM. The double CPU electric energy quality monitoring device guarantees real-time monitoring, and meanwhile possesses a higher sampling rate and an accurate and high-speed data transmission function; in addition, the double CPU electric energy quality monitoring device possesses greater functional modules, and can realize external data storage, wireless communication, touch screen control and alarm.

Description

technical field [0001] The invention relates to the monitoring technology of electric energy quality in the electric power system, in particular to a dual-CPU electric energy quality monitoring device composed of DSP and ARM. Background technique [0002] With the rapid development of the power industry, steady-state power quality indicators such as voltage fluctuations, frequency fluctuations, and harmonics have attracted sufficient attention from relevant departments. At the same time, the problem of transient power quality has become more and more prominent, such as voltage drop, voltage surge, short-term power failure and other phenomena that often occur, which have brought considerable losses to users. The traditional monitoring method is a monitoring technology based on the effective value theory, but because the time window is too long, only measuring the effective value of the grid voltage cannot accurately describe the power quality problem, so it is necessary to de...

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Problems solved by technology

At the same time, the problem of transient power quality has become more and more prominent, such as frequent occurrence of voltage drop, voltage surge, short-term power failure, etc., which have brought considerable losses to users.

The traditional monitoring method is a monitoring technology based on the effective value theory, but because the time window is too long, onl

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