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Developing a Procedure for Segmenting Meshed Heat Networks of Heat Supply Systems without Outflows

机译：制定一种程序，用于分割没有流出的供热系统的网状热网络

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The heat supply systems of cities have, as a rule, a ring structure with the possibility of redistributing the flows. Despite the fact that a ring structure is more reliable than a radial one, the operators of heat networks prefer to use them in normal modes according to the scheme without overflows of the heat carrier between the heat mains. With such a scheme, it is easier to adjust the networks and to detect and locate faults in them. The article proposes a formulation of the heat network segmenting problem. The problem is set in terms of optimization with the heat supply system’s excessive hydraulic power used as the optimization criterion. The heat supply system computer model has a hierarchically interconnected multilevel structure. Since iterative calculations are only carried out for the level of trunk heat networks, decomposing the entire system into levels allows the dimensionality of the solved subproblems to be reduced by an order of magnitude. An attempt to solve the problem by fully enumerating possible segmentation versions does not seem to be feasible for systems of really existing sizes. The article suggests a procedure for searching rational segmentation of heat supply networks with limiting the search to versions of dividing the system into segments near the flow convergence nodes with subsequent refining of the solution. The refinement is performed in two stages according to the total excess hydraulic power criterion. At the first stage, the loads are redistributed among the sources. After that, the heat networks are divided into independent fragments, and the possibility of increasing the excess hydraulic power in the obtained fragments is checked by shifting the division places inside a fragment. The proposed procedure has been approbated taking as an example a municipal heat supply system involving six heat mains fed from a common source, 24 loops within the feeding mains plane, and more than 5000 consumers. Application of the proposed segmentation procedure made it possible to find a version with required hydraulic power in the heat supply system on 3% less than the one found using the simultaneous segmentation method.
机译：通常，城市的供热系统具有环形结构，可以重新分配流量。尽管事实上环形结构比径向结构更可靠，但热网络的运营商还是喜欢根据方案在正常模式下使用它们，而不会在热干线之间出现热载体溢出。通过这种方案，可以更轻松地调整网络并检测和定位其中的故障。本文提出了热网分段问题的表述。该问题是根据供热系统过大的液压动力作为优化标准进行优化而设置的。供热系统计算机模型具有层次结构互连的多层结构。由于仅对主干热网的水平执行迭代计算，因此将整个系统分解为多个水平可将解决的子问题的维数减少一个数量级。通过完全枚举可能的分割版本来解决问题的尝试对于实际存在的大小的系统似乎不可行。该文章提出了一种用于搜索供热网络的合理分段的程序，该程序将搜索范围限制为将系统划分为流收敛节点附近的分段，然后对解决方案进行改进。根据总的多余水力标准，分两个阶段进行优化。在第一阶段，负载在源之间重新分配。之后，将热网络分成独立的片段，并通过移动片段内部的分隔位置来检查获得的片段中增加多余水力的可能性。以城市供热系统为例，对提议的程序进行了批准，该系统包括从一个公共源馈送的六个热力干线，馈电干线平面内的24个回路以及超过5000个用户。提议的分段程序的应用使得在供热系统中找到所需液压动力的版本比使用同时分段方法找到的版本少3％。

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