Intelligent system for on-line automatic detection of electricity-saving potential and rapid energy audit

The invention discloses an intelligent system for on-line automatic detection of electricity-saving potential and rapid energy audit. The system comprises a synchronous sampling signal module, a signal sensing module, a signal conditioning module, an A/D sampling module, a DSP and peripheral circuits thereof and a CPLD and peripheral modules thereof, wherein the signal sensing module, the signal conditioning module, the A/D sampling module, the DSP and peripheral circuits thereof and the CPLD and peripheral modules thereof are connected in sequence. A data sensing module is further connected with the A/D sampling module through the synchronous sampling signal module, and the signal sensing module is connected with lines to be tested of individual line subscribers. The synchronous sampling signal module comprises a zero passage comparison circuit and a phase-locked loop synchronous frequency doubling circuit which are connected in sequence. The A/D sampling module uses an MAX1324 chip, and the phase-locked loop synchronous frequency doubling circuit is connected with the MAX1324 chip. The electric power parameters detected through the system can be used for energy-saving potential analysis of energy consumption users to achieve energy saving of the maximum potential. The system has the advantages of being simple in operation, portable, low in cost, strong in intellectualization, high in measuring precision, strong in anti-interference capacity, high in reliability and the like.