企业配电网直接服务于企业生产，其供电质量和供电可靠性对企业的发展有重要意义，针对企业负荷构成的特殊情况，研究符合企业实际情况的负荷数学模型，应用切实可行的无功补偿措施改善企业配电网无功分布情况，对企业有重要的理论意义和实用价值。 首先，本文对国内外电力系统常用的多项式负荷模型、指数型负荷模型、三阶机电感应电动机负荷模型、集结式感应电动机负荷模型等，从数学模型、参数辨识方法、计算精度等方面，进行了综合阐述和比较，认为在负荷组成主要是感应电动机的企业配电网中，现在电力系统常用的用于分析大型电网的三阶机电暂态模型、一阶电压暂态模型、一阶机械暂态模型等，不是分析企业配电网的最佳选择。其次，企业配电网的主要负荷组成为感应电动机，因此，集结式感应电动机负荷模型在物理特性上符合企业配电网负荷组成的实际情况、计算工作量和模型的有功、无功计算精度都可较好满足企业配电网分析计算的要求。 在上述研究的基础上，本文应用针对辐射状配电网提出的前推回代潮流算法，对企业配电网进行分析计算，计算结果数据应用到企业配电网分散补偿、集中补偿、合理选择补偿点和补偿容量等相关计算中。用实例证明了负荷模型和补偿方案对于分析企业配电网的有效性。文中的思路和方法对企业配电网的研究有一定的工程和理论价值。

Enterprise distribution power system serves directly to manufacture, the energy quality and power supply reliability are important to the development of enterprises. In view of the component of enterprise load ,the study on the establishment of load model and improve the situation of energy—saving have important theoretical and practical value. Firstly, the static load model, the dynamic load model,the assembly induction motors equivalent model was compared in the paper from identification, precision, etc. In view of the fact that induction motors are the main element of enterprise load , third-order electromechanical transient model, a transient voltage-order model, a transient band mechanical model are not the appropriate choice of enterprise distribution power system. Secondly, assembly induction motors load model is up to the fact of enterprise , the amount of computation and the precision of active power and reactive power can better meet the requirements of the analysis and calculation of enterprise distribution power system analysis. On the basis of the of above study production ,back/forward sweep method for radial distribution load flow was used to analyse the operating conditions of enterprise in the paper. The results of numeration was applied to the decentralized or centralized reactive power compensation .The load model and the compensation algorithm have been tested .The results indicate that they are effective in the analyze and calculation of enterprise distribution power system.