中文摘要：

分布式电源（DG）对配电网网损和电压的影响主要与其位置和容量以及负荷分布有关。提出一种基于“负荷质心”的DG优化配置新方法，将DG的供电范围看成一个不规则形状的“负荷块”．节点负荷的大小看成该处的质量，DG安装在负荷块的“质心”时，配电网有功损耗最小。为保证重要负荷连续可靠供电，根据负荷对供电可靠性要求不同引入了负荷权重系数。该方法简单易行，避免传统优化算法的繁琐过程。仿真算例证明了所提方法的有效性和准确性。

英文摘要：

The power loss and voltage distribution of distribution network are closely related to the location and size of DG（Distributed Generation） and the load distribution. A DG optimal configuration based on load centroid is proposed,which treats the district DG supplied as a load block with irregular shape and the load as its quality. The power loss is the least when DG is located at the load centroid. In order to ensure the continuity and reliability of power supply to the important load,the load weight coefficient is introduced according to the reliability requirement of load. This method avoids the complicated process of traditional optimization algorithms. Its effectiveness and accuracy are verified by the simulative results.