| 引用本文: | 郭峰,姚莉娜,刘恒,吴珊珊.引入三相不平衡度的低压电网理论线损计算[J].电力自动化设备,2007,27(11):51-54 |
| .Theoretical line loss calculation with three-phase unbalance degree for low-voltage distribution network[J].Electric Power Automation Equipment,2007,27(11):51-54 |
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| 摘要: |
| 提出采用均方根电流法计算低压电网理论线损,通过分析三相不平衡线路的线损,推导出线损与不平衡度的关系公式,并将该公式用于三相不平衡配电线路的理论线损计算。系统引入三相不平衡度采集装置,以单片机为主控制芯片,给出了系统结构框图。在采集三相电流时,使用该采集装置挂接在变压器出口端,定时实时采集和存储三相电流,以供计算三相不平衡度。以某台区实际运行为研究实例,介绍了计算步骤,计算结果表明所提出的计算系统是可行的。 |
| 关键词: 三相不平衡线路,线损率,不平衡度 |
| DOI： |
| 分类号:TM744 |
| 基金项目: |
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| Theoretical line loss calculation with three-phase unbalance degree for low-voltage distribution network |
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GUO Feng YAO Li-na LIU Heng WU Shan-shan
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| Abstract: |
| The mean-square-root current method is proposed to calculate the theoretical line loss for low-voltage distribution network.Based on the analysis of three-phase unbalanced line loss,the relationship between line loss and unbalance degree is deduced,which is then applied to theoretical line loss calculation for unbalanced three-phase distribution network.The three-phase unbalance degree acquisition unit is designed,which is connected to the output terminal of transformer to collect and save the real-time three-phase currents for unbalance degree calculation.With a singlechip as its master controller,its system structure is presented.For a real distribution network,the calculation steps are introduced and the calculative results prove its feasibility. |
| Key words: unbalanced three-phase lines,line loss rate,unbalance degree |
