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智能电网-变压器损耗管理


TLM主要的概念是基于从计费系统的数据库每月导出的数据和客户详细的负荷曲线来评估变压器负荷曲线

ETAP变压器损耗管理基于客户分类,客户数量,电力历史需求和放在当前和将来的系统中的变压器的相对负荷需求

The Transformer load management application can be used to realize direct equipment, labor and materials efficiency. The cost of electric transformers can be viewed as a function of load capacity over time, and the resulting effect on equipment life span. An under loaded transformer is a capital loss; the same transformer could be used to serve higher customer concentrations and therefore make for better utilization of that particular piece of equipment. Alternatively, an overloaded transformer would be expected to have a shorter usable equipment life.

变压器损耗管理可被用来提高直接设备,劳动力和材料的利用率。电变压器的成本可以被看作是负载容量随时间变化的函数,延长设备的寿命,轻载变压器是重要的损耗。相同的变压器。。。。。。。因此更好的利用特定的设备。另外,重载变压器预计将有一个较短的可用设备的使用寿命。

Transformer Load Management | ETAP
通过结合ETAP GIS/配电网查看视图与变压器负载管理,运营商在某些情况下持续使用特定的变压器将是明智的决策,这个决策可以把特定的变压器切换成更高或更低的负载容量单元。

变压器损耗管理系统还具有允许设计者或操作者测试负载情况的能力。例如,客户负荷增长可为现有变压器位置规划。设计者利用变压器损耗管理应用程序可以检查变压器当前和过去的负荷发生情况。


ETAP transformer load management application accomplishes multiple goals


  • Allow for field validation of the transformer to customer link.
  • Provided loading analysis that takes into account environmental and equipment factors, as well as statistically determined load profiles.
  • Allow for an efficient yet complete reporting of the resulting load analysis.
  • Cost of ownership feature allows for the analysis of relative costs associated with transformer selection and the decision to replace existing transformers. It takes into account the cost difference between various transformers, estimated labor and replacement expenses, and the relative cost of load and no-load transformer losses.

ETAP currently has a load profile and load sector library that can be used to import customer billing data.
Transformer Load Management - Load Sector Library | ETAP
click for larger image
Estimated data includes Peak kVA, Utilization Factor, Balance Phase, Overload, Under-Utilization and Average Loading.

If the purpose of the transformer load analysis is to determine as closely as possible the maximum demand on a distribution transformer, then neither the Demand Factor method nor the transformer load management method should be used. i.e. neither of these methods are best when the analysis of the total feeder is to be performed. Using these methods will result in a much larger maximum diversified demand at the substation than actuals. When the total feeder is to be analyzed, the method that gives good overall results is to allocate the load based on transformer ratings.

In addition to the traditional transformer load management technique, ETAP also includes Load Allocation Based on Transformer Ratings. When only the ratings of the distribution transformers are known, the feeder can be allocated based upon the metered demand and the transformer kVA ratings. In addition this method is also advantageous when a database that relates transformers and served customers is not available and hence requires least amount of data. An Allocation Factor (AF) is determined based upon the metered three phase or single phase kW or kVA demand (at substation) and the total connected distribution transformer kVA.




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