GBT155431995电能质量三相电压允许不平衡度

GB/T155431995QualityofelectricenergysupplyAdmissiblethree-phasevoltageunbalancefactor11995-04-061996-01-01150Hz22.1unbalancefactorεUεI2.2Positive-sequencecomponent2.3negative-sequencecomponent2.4pointofcommoncoupling33.12%4%(A)GB7553.21.3%3.14B5(A)()A1()24hA295%95%(30)5%72min30min5minA33sεε==∑121mkkm(A1)εk3skm3s(m6)0.2%1%B()B1εUUU=×21100%(B1)U1VU2V(B1)U1U2I1I21B2B2.1(B1)B2.2abcε=−−+−×136136100LL(%)(B2)=++++()/()4442222B3A3.1εUIUS=⋅3102LK(%)(B3)I2ASKMVAULkVB3.2(%)100KL×=SSUε(B4)SLMVA_____________________