The Economic Impacts of Deferring Electric Utility Tree Maintenance
The Economic Impacts of Deferring Electric Utility Tree Maintenance
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推迟电力树维护的经济影响
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
H. Wiant
中科院分区：
文献类型：
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作者：
D. Browning;H. Wiant
进行了一项研究，以探讨经济推迟线清除树木修剪。修剪树木的成本被发现显着增加，因为它的增长接近，超越，导体。随着树木生长时间的延长，生物量的数量也会增加，因此处理成本也会增加。预测模型的开发，为三个公用事业提供了一种手段，预测总的影响，推迟生产线清理工作的船员时间和成本与修剪树木。每推迟一美元的日常维护，在随后的几年中必须花费远远超过一美元来重新建立首选的周期。增加的具体数量取决于公用事业，并受生产成本、树木生长率、场地特征（胸径和修剪类型）等的影响。如果资金的减少没有被随后几年的更大支出所抵消，树木的维护周期就会迅速延长。模拟每年20%的资金减少导致一个公用事业的周期从5年延长到9年，超过12年。这些估计没有考虑延迟的线路清理工作对服务可靠性、服务恢复成本以及用于热点定位和响应客户计划外维护请求的时间的影响。
A study was conducted to examine the economics of deferring line clearance tree pruning. The cost of pruning a tree was found to increase significantly as it grows closer to, and beyond, the conductors. The amount of biomass, and thus disposal cost, also increases with the length of time a tree is allowed to grow. Predictive models were developed for three utilities to provide a means of projecting the total impact of postponing line clearance work on crew time and costs associated with pruning trees. For every routine maintenance dollar deferred, substantially more than one dollar must be spent in subsequent years to re-establish the preferred cycle. The specific amount of this increase is utility dependent and is affected by production costs, tree growth rates, site characteristics (dbh and type of pruning), etc. An additional adjustment would be necessary to allow for an increase in disposal costs resulting from a larger amount of biomass removed. If funding reductions are not offset with larger expenditures in subsequent years, tree maintenance cycles are rapidly extended. Modeling a 20 percent annual funding decrease resulted in extending one utility's cycle from 5 years to 9 years over a 12-year period. These estimates do not take into account the impact that deferred line clearance work has on service reliability, service restoration costs, and the amount of time spent on hotspotting and responding to customer requests for unscheduled maintenance.