摘要
本文提出了一个用于电力系统暂态安全分析的混合系统结构。该系统将相互协调的算法,即:基于简单模型的快速扩展等面积准则算法和基于复杂模型的数值积分法,与基于知识的推理有机地结合起来,建立了分层知识库及其相应的推理机。低层次的子系统用于解决不同的领域任务,而包含元知识的高层次系统则起着协调作用;同时利用误差域和可信度来反映描述性知识和过程性知识的不精确性和不确定性。该混合系统为我们提供了一个较实际的规划决策支持系统,类似于人类专家求解问题的模式,可用于在线和离线暂态安全分析。
This paper presents a hybrid architecture for the transient security analyses of power systems by integrating mutually complementary algorithms,i.e.the extremely fast extended equal area 'criterion based on simple models and accurate numerical integration methods based on detailed models,with knowledge-based reasoning.Hierarchical knowledge bases with corresponding inference engines are proposed.The subsystems on the low level aim at different domain objectives and the high level with metaknowledge acts as a coordination role.An error range and a confidence factor are used to reflect the inaccuracy and uncertainty of both descriptive and processing knowledges.This hybrid architecture provides us with a more realistic support system.which is more similar to the problem solving fashion of human experts,for both on-line and off-line transient security analyses.
出处
《电力系统自动化》
EI
CSCD
北大核心
1989年第3期5-14,共10页
Automation of Electric Power Systems
关键词
电力系统
暂态安全分析
混合系统
expert system,hybrid system,transient security assessment,hierarcnical knowledge base,uncertain knowledge,inaccurate knowledge.
