基于最短路径规划的供热管网泄漏定位方法

针对供热管网泄漏检测、定位困难的问题，本文充分考虑了管网负压波传播的多径效应，提出了一种基于负压波传播最短路径规划的供热管网泄漏定位方法。本方法首先搜索出各潜在漏点到各压力变送器的最短路径，计算负压波在管网中传播的最短时延，构成时延标准库；然后将现场测得的负压波的实际到达时延与时延标准库进行比对，确定漏点位置。在区域面积为13 km×5 km的现场供热管网对本方法开展了泄漏定位实验验证；当有效压力监测点数为5时，本方法可实现对1 000 m半径比对范围内泄漏的零偏差定位。本方法采用了精确的非模糊型的原理，且避免了在现场大型管网所有支管上安装压力变送器，具有重要的应用价值。

Leak location method of heated water pipeline network based on shortest path planning

In response to the difficulty in detecting and locating HWPN leaks, this article fully considers the multipath effect of negative pressure wavs (NPWs) propagation in the pipeline network and proposes a HWPN leak location method based on the shortest path planning of NPW propagation. First, the shortest paths from each potential leak point to each pressure transmitter are searched, and the shortest time delay of NPW propagation in the HWPN is calculated to form a time delay standard library. Then, the actual arrival time delay of NPWs that is measured in real time is compared with the time delay standard library to determine the leak location. Small leak location experiment in an on-site 13 km×5 km HWPN is implemented to evaluate the proposed method. When the number of effective pressure monitoring points is only 5, this method can realize zero-error leak location within the time-delay match range of 1 000 m radius. This method utilizes accurate and non-fuzzy principle, which can also avoid installing pressure transmitters on all branches of huge HWPN in field. Therefore, it has important application value.