Device for electric energy quality on-line monitoring

The utility model provides a device for electric energy quality on-line monitoring, include: signal conditioning module, phase-locked loop frequency doubling circuit, AD conversion module, DSP data processing module, leakage detection module, ARM module and display module, signal conditioning module with AD conversion module, DSP data processing module, the ARM module connects gradually, the phase-locked loop frequency doubling circuit with signal conditioning module and AD conversion module connect, still be connected with in the ARM module the leakage detection module, timing module and communication module. The utility model discloses a device for electric energy quality on-line monitoring can monitor a lot of harmonic in the electric wire netting to and the frequency difference parameter, electric leakage parameter in can also detect the network, thereby the voltage variation in the objective appraisal network