中文摘要：

概括了网络化电能质量（PQ）监测与分析系统的主要特性和关键研究课题。采用一种经济型的网络化监测与分析系统结构,并通过整数线性规划问题最优解求取的方法进行监测点数量和布置点的优化设计,实现系统构建的经济优化。提出了一种PQ事件源定位的改进型算法,基于虚拟PQ监视器（PQM,即电能质量采集终端）的定义实现系统覆盖矩阵和方向矩阵的扩展,经过简单的矩阵运算可实现事件源的自动精确定位。分别采用5节点环状系统和简单的辐射型配电系统验证了经济优化算法和事件源自动精确定位算法的有效性。

英文摘要：

The main characteristics and key aspects of a networked power quality monitoring and analysis system are summarized.An economical and networked system framework is adopted.The optimal sitting and number of monitors are determined by solving an integer linear programming problem,through which economic optimization to construct the system is implemented.An improved algorithm of power quality event source identification is presented,in which extended cover matrix and extended direction matrix are generated with the definition of the virtual PQM.The source of power quality event can be identified accurately with simple matrix operation.A loop-network of five-bus power system and a simple radial distribution system are provided to validate the effectiveness of the two above algorithms respectively.