Design and Application of a Power Quality Monitoring Equipment Based on DSP and CPLD

A new design of DSP+CPLD (Complex Programmable Logic Device) power quality monitor (PQM) is presented in this paper. In this PQM, DSP realizes real-time data processing and the control of peripheral devices through CPLD decoding the CPLD is used to generate control timing between DSP and peripheral devices. In this paper, the use of CPLD in design of logic interface between DSP and peripheral devices is described in detail. The feasibility of this design is verified by the simulating results of control timing of CPLD, and the realization of on-line monitoring of power quality indices of PQM is proved by the testing results.