3Alvarado F L,Dobson I,Hun Y.Computation of clo-sest bifurcation in power systems[J].IEEE Trans on Power Systems,1999,9(2):918-928
4Lee S H,Grainger J J.Optimum placement of fixed and switched capacitors on primary distribution fee-ders[J].IEEE Trans on Power Appratus and Systems,1981,100(1):345-352