基于CUSUM改进算法的实际供热管网泄漏故障分级诊断
Grade diagnosis of leakage faults in actual heating network based on improved CUSUM algorithm
摘要：
为了能够对供热管网泄漏故障进行及时和有效的诊断,提高管网泄漏位置的搜索效率,本文基于CUSUM改进算法,提出了通过管网拓扑结构的自由组合进行泄漏分级诊断的方法。以某城区集中供热管网为研究对象,将其拆分成5种拓扑结构并建立各自的管网水力工况模型,并选取4个1点泄漏工况和4个2点泄漏工况进行了验证分析。结果表明:在保证供热管网泄漏诊断模型压力、流量的仿真值与实际运行数据的最大相对误差绝对值不超过10%的条件下,该方法的泄漏位置诊断准确率达到了75%,验证了该方法应用于实际管网的可行性。
Abstract：
In order to diagnose leakage faults in heating networks timely and effectively and improve the search efficiency of leakage locations in networks, based on the improved CUSUM algorithm, this paper presents a method for leakage grade diagnosis through the free combination of network topology structure. Taking the central heating network of an urban area as the research object, it is divided into five topology structures and their respective hydraulic condition models of the network are established. Four one-point leakage conditions and four two-point leakage conditions are selected for verification and analysis. The results show that under the condition that the absolute values of the maximum relative errors between the simulated values and the actual operation data of pressure and flow of the heating network leakage diagnosis model do not exceed 10%. The diagnosis accuracy rate of the leakage location of this method reaches 75%, verifying the feasibility of this method applied to the actual network.
Keywords:central heating; heating network; topology structure; leakage fault; grade diagnosis; CUSUM algorithm; two-point leakage