基于分解协调及外网浓缩等值的多代理状态估计  

Multi-agent State Estimation Based on Decomposition and Coordination and External Network Concentration Equivalence

作　　者：卢志刚[1] 张静[1] 程慧琳[1] 鲍峰 

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,河北省秦皇岛市066004 [2]黑龙江省电力公司,黑龙江省哈尔滨市150000

出　　处：《电力系统自动化》2012年第14期23-29,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(61071201)~~

摘　　要：传统分布式状态估计中,各分区子网独立估计时未考虑相邻子网的网络模型及运行状态,而只在协调时才弥补之前忽略的信息。针对此问题,文中结合多代理理论,提出一种基于分解协调及外网浓缩等值的状态估计方法。采用搭接式分区方法实现系统分解,构建了适用于分布式状态估计的二维联盟多智能体架构;通过建立外网浓缩等值模型,各子系统能够计及相邻系统影响,即使未经外层协调,独立估计结果也能满足一定的精度要求;构建了基于黑板模型的启发式协调修正机制,加快了信息融合速度,且使得相邻系统受到来自非边界节点的影响;并根据节点状态量对注入功率的灵敏度分析实现外层迭代,避免了重复估计。IEEE 14节点、30节点及118节点系统的仿真结果验证了所述算法的正确性及有效性。In traditional distributed state estimation, a subarea does not consider the network model and operating state of its neighboring subnet when making its own estimation independently while making up for the previously neglected information only during coordination. To remedy such a situation, a new distributed state estimation based on decomposition and coordination equivalent to external network concentration is presented according to the multi-agent theory. The large-scale power system is decomposed into a number of overlapping subsystems to build a 2-dimensional federated multi-agent framework suitable for distributed state estimation. By establishing the external network concentration equivalent model all subsystems are enabled to consider their neighbors＇ influence. Thus the estimate solution in each subarea can satisfy definite precision requirements even without outside coordination. A heuristic coordination and correction mechanism based on the blackboard model is founded and the information fusion rate accelerated. And the adjacent systems are subjected to the effect from non- boundary nodes. In addition, outer iteration is performed according to the analysis of the injected power＇s sensitivity by the quantity of the node states to avoid repeated estimate. Test results on IEEE 14-bus, 30 bus and ll8-bus system each show the correctness and effectiveness of the algorithm proposed.

关 键 词：状态估计 分解协调 外网等值 多代理 黑板模型 

分 类 号：TM711[电气工程—电力系统及自动化]