基于双向递推的枝状供热管网阻抗辨识方法
Impedance identification method of tree-shaped heating network based on bidirectional recurrence
摘要：
为提高基于智能算法的供热管网故障诊断模型的实用性，提出了一种基于双向递推的枝状供热管网阻抗辨识方法。该方法在辨识模型中对常规枝状供热管网模型进行了改进，增加了热力站进出口压力测点节点；基于实际中可测得的压力、流量数据，通过水力工况组合的形式求解辨识方程组，从正向及反向进行管网阻抗递推辨识；将双向递推结果求平均作为阻抗辨识值以减小辨识误差。通过算例验证了该方法的实用性，只通过较少的水力工况即可达到较小的辨识误差。
Abstract：
To improve the practicability of heating network fault diagnosis model based on intelligence algorithm, proposes an impedance identification method of tree-shaped heating network based on bidirectional recurrence. Improves the conventional tree-shaped heating network model by adding pressure measuring nodes at the inlet and outlet of heating station. Based on the available pressure and flow rate data, solves the identification equations through multiple hydraulic condition combinations. Identifies the impedance by both forward recursive and back stepping method, and averages the results of bidirectional recurrence to reduce errors. Verification by a case shows that the method has relatively better practicability and can reach higher accuracy with fewer hydraulic conditions.
Keywords:tree-shaped heating network，bidirectional recurrence，identification of impedance，hydraulic condition combination, error of identification