Non-uniform Quantisation Current Differential Protection Algorithm Applied On Power Specific Integrated Circuit

An improved current differential protection algorithm, which actually based on non-uniform quantisation because of the dissimilar sampling demands between transient state and steady state of power system, is presented and mounted on the power specific integrated circuit (PSIC) named FUXI. This method reduces the computational pressure on the PSIC by non-uniformly quantizing the electrical quantity information sampled. This paper also verifies the feasibility of applying the improved algorithm to power-specific integrated circuits by comparing the correctness of the logic running on the chip and in simulation. It practically indicates the engineering application value of power specific integrated circuit in the relay protection.