.用電負(fù)荷計(jì)算書(shū)工程名:《民用建筑電氣設(shè)計(jì)標(biāo)準(zhǔn)》JGJ16-2023:用電負(fù)荷統(tǒng)計(jì)表：用電設(shè)備組名稱(chēng)總功率需要系數(shù)功率因數(shù)視在功率有功功率無(wú)功功率計(jì)算電流北教學(xué)樓72.000.850.8572.0061.2037.93109.39綜合樓54.000.750.8547.6540.5025.1072.39南教學(xué)樓89.000.850.8589.0075.6546.88135.22試驗(yàn)樓159.000.850.85159.00135.1583.76241.58室外25.001.000.8529.4125.0015.4944.69消防設(shè)備23.001.000.8028.7523.0017.2543.68中心機(jī)房用電10.001.000.8511.7610.006.2017.87變壓器S1北教學(xué)樓、綜合樓、南教學(xué)樓、試驗(yàn)樓、室外、消防設(shè)備、中心機(jī)房用電S1Pc=Kp*∑(Kd*Pn)Qc=kq*∑(Kd*Pn*tgΦ)..Sc=√(Pc*Pc+Qc*Qc)Ic=Sc/(√3*Ur)有功功率Pc:333.45無(wú)功功率Qc:158.77視在功率Sc:369.32有功同時(shí)系數(shù)kp：0.90無(wú)功同時(shí)系數(shù)kq：0.97計(jì)算電流Ic:561.12總功率因數(shù):0.83有功負(fù)荷系數(shù)α：0.80無(wú)功負(fù)荷系數(shù)β：0.80補(bǔ)償前功率因數(shù)COSφ1:0.83補(bǔ)償后功率因數(shù)COSφ2:0.92計(jì)算補(bǔ)償容量QC1:66.87(kvar)實(shí)際補(bǔ)償容量QC2:(kvar)Pc=Kp*∑(Kd*Pn)=333.45(kW)..Qc=kq*∑(Kd*Pn*tgΦ)-QC1=158.77(kvar)Sc=√(Pc*Pc+Qc*Qc)=369.32(kVA)Ic=Sc/(√3*Ur)=561.12(A)COSφ1=1/√[1+〔β*Qc/α*Pc〕2]=0.83COSφ2=0.92QC1=α*Pc*〔tgφ1-tgφ2〕=66.8710負(fù)荷率：70額定容量：630〔kW〕..變壓器容量選用變壓器容量選用10/0.4kV-630kVA變壓器一臺(tái)，變壓器負(fù)載率為70%。序號(hào)組名稱(chēng)數(shù)數(shù)有功功計(jì)算負(fù)荷無(wú)功功率視在功率(kW)(kvar)率(kvA)1北教學(xué)樓72.000.850.8561.2037.9372.002綜合樓54.000.750.8540.5025.1047.653南教學(xué)樓89.000.850.8575.6546.8889.004試驗(yàn)樓159.000.850.85135.1583.76159.005室外25.001.000.8525.0015.4929.416消防設(shè)備23.001.000.8023.0017.2528.757中心機(jī)房用電10.001.000.8510.006.2011.76合計(jì)432370232.61437.57Kp=0.9333計(jì)209.35424.4無(wú)功補(bǔ)償至66.87COSφ=0.92補(bǔ)償后負(fù)荷333142.5360.74..變壓器S1的回路:S1Pc=Kp*∑(Kd*Pn)Qc=kq*∑(Kd*Pn*tgΦ)Sc=√(Pc*Pc+Qc*Qc)Ic=Sc/(√3*Ur)Pc:395.44Qc:192.20視在功率Sc:439.68有功同時(shí)系數(shù)kp：0.80無(wú)功同時(shí)系數(shù)kq：0.80Ic:668.020.85有功負(fù)荷系數(shù)α：0.85無(wú)功負(fù)荷系數(shù)β：0.80COSφ1:0.86補(bǔ)償后功率因數(shù)COSφ2:0.92QC1:52.87(kvar)QC2:(kvar)Pc=Kp*∑(Kd*Pn)=395.44(kW)Qc=kq*∑(Kd*Pn*tgΦ)-QC1=192.20(kvar)Sc=√(Pc*Pc+Qc*Qc)=439.68(kVA)Ic=Sc/(√3*Ur)=668.02(A)COSφ1=1/√[1+〔β*Qc