ELIMINATING NEGETIVE EFFECT OF INVERTER-BASED DGs ON FUSE-RECLOSER COORDINATION IN DISTRIBUTION SYSTEMS

Despite many advantages of distributed generation (DG) sources, they may have a negative effect on the protection of distribution systems. In a distribution system, fuse-recloser protection scheme is designed such that the recloser could operate faster than the fuse to prevent fuse burning; but, the presence of DGs in fault conditions may lead to increased fuse current and thus faster performance of the fuse than the recloser and lack of coordination. In this paper, effect of DGs on fuse-recloser coordination was studied using analytical relations and simulation. A useful control method was presented for reducing the effect of DG on fuse-recloser coordination. Accordingly, direction of DG current was changed by controlling DG reactive power at the fault time, which reduced the fuse current. Results of the simulation on IEEE 13-bus system showed that the proposed control method was able to remove the negative effect of DG on fuse-recloser coordination.

Keywords:

Distributed generation (DG), distribution system, fuse-recloser coordination,

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