直流系统负荷负荷计算.docx

表4-1 xx1000千伏变电站工程直流系统负荷统计一览表序号负荷名称负荷容量(kW)负荷系数负荷电流(A)经常电流(A)事故放电时间(h)及电流(A)初 期持续随机末期1min0～0.50.5～1.01.0～1.51.5～2.01主控楼经常负荷2.531.011.511.511.511.511.511.511.521000kV#1小室经常负荷7.01.031.8231.8231.8231.8231.8231.8231.8231000kV#2小室经常负荷4.751.021.5921.5921.5921.5921.5921.5921.594500kV#1小室经常负荷3.491.015.8615.8615.8615.8615.8615.8615.865500kV#2小室经常负荷4.011.018.2318.2318.2318.2318.2318.2318.236主变及110kV小室经常负荷5.731.026.0526.0526.0526.0526.0526.0526.057UPS电源装置150.640.9140.9140.9140.9140.9140.918事故照明逆变电源81.036.3636.3636.3636.3636.3636.369控制保护事故负荷7.650.620.8620.8610断路器集中跳闸12.920.635.2435.2411断路器合闸1.05512电流统计(A)IjcI1I2I3I4I5Ir125.05258.42202.32202.32202.32202.325第一阶段计算容量CC1=Kk?t=1min KC1=0.94 I1= 258.42A∴ CC1=1.4×258.42/0.94=384.9(Ah)第二阶段计算容量CC2=Kk?[+(I2-I1)]t1=30min KC1=0.66 I1=258.42 At2=29min KC2=0.67 I2= 202.32A∴CC2=1.4×[258.42/0.66+(202.32-258.42)/0.67]=430.9(Ah)第三阶段计算容量CC3=Kk?[+(I2-I1)+(I3-I2)]t1=60min KC1=0.45I1=258.42 At2=59min KC2=0.46I2=202.32At3=30min KC3=0.66 I3=202.32A∴CC3=1.4×[258.42/0.45+(202.32-258.42)/0.46]=633.2(Ah)第四阶段计算容量CC4=Kk?[+(I2-I1)+(I3-I2)+(I4-I3)]t1=90min KC1=0.37 I1=258.42 At2=89min KC2=0.376 I2=202.32At3=(90-30)min KC3=0.45 I3=202.32At4=(90-60)min KC4=0.66I4=202.32A∴CC4=1.4×[258.42/0.37+(202.32-258.42)/0.376]=768.9(Ah)第五阶段计算容量CC5=Kk?[+(I2-I1)+(I3-I2)+(I4-I3)+(I5-I4)]t1=120min KC1=0.29 I1=258.42At2=119min KC2=0.29 I2=202.32At3=(120-30)min KC3=0.37 I3=202.32At4=(120-60)min KC4=0.45I4=202.32At5=(120-90)min KC5=0.66I5=202.32A∴CC5=1.4*[258.42/0.29+(202.32-258.42)/0.29]= 976.7(Ah)随机负荷KCR=1.00CR=5/1.00=5(Ah)CR叠加在CC2、CC3、CC4、CC5上，与CC1比较，取最大值，故蓄电池容量为：C10=CC5+CR=981.7(Ah)