Knowledge based identification of PCB transformers in power systems

在NSERC合作研究与开发(CRD)计划的这项建议中，我们提出了一种基于知识的抽样方法，以识别受多氯联苯(PCBs)污染的变压器，用于去除PCBs的污染。众所周知，多氯联苯对人类健康和环境有害。多氯联苯变压器含有加拿大目前使用的大约82%的多氯联苯[3]，而askarel(一般为40%-80%的多氯联苯)主要包含在数万台在用变压器和数千台在库变压器中。仅在不列颠哥伦比亚省，就有5000多台变压器。虽然印刷电路板变压器在1986年后就不再生产了，但由于它们的预期寿命为50年，所以今天使用的大量变压器仍然含有印刷电路板。由于每台(高压)变压器的成本在100-500万美元之间，更换所有现有的印刷电路板变压器是不切实际的，没有一家公用事业公司能够负担得起这样做。然而，斯德哥尔摩公约[2]缔约方有义务在2025年前逐步淘汰设备中使用的多氯联苯。在此之前，必须妥善管理现有设备，以减少人类和环境对多氯联苯的暴露。通过这项研究项目开发的解决方案将极大地鼓励多氯联苯所有者，如加拿大各地的电力公用事业公司，通过最大限度地降低成本和最大限度地重复使用现有设备，加快淘汰多氯联苯设备。这项建议是由西蒙弗雷泽大学(SFU)和不列颠哥伦比亚省输电公司(BCTC)联合开发的。

In this proposal to the NSERC Collaborative Research and Development (CRD) program, we propose a knowledge based sampling approach to identifying polychlorinated biphenyls (PCB for short) contaminated transformers for decontamination of PCB. PCB is known to be harmful to human health and environments. PCB transformers contain about 82% of PCBs currently in use in Canada [3], and askarel (generally 40-80% PCB) is largely contained in tens of thousands of in-service transformers and in several thousands in-storage transformers. In British Columbia alone, there are more than 5000 transformers. Although PCB transformers were not manufactured after 1986, since they have an expected life-time of 50 years, a very large number of transformers in use today still contain PCB. With the cost of each (high voltage) transformer in the range of 1-5 million dollars, replacing all existing PCB transformers is impractical and no utility can financially afford to do so. However, the parties at the Stockholm Convention [2] are obligated to phase out the use of PCBs in equipment by 2025. Until then, existing equipment must be properly managed to reduce human and environmental exposure to PCB.The solution developed through this research project will greatly encourage PCB owners, such as power utilities across Canada, to expedite the phase-out of PCB equipment by minimizing the cost involved and maximizing the re-use of existing equipment. This proposal was jointly developed by Simon Fraser University (SFU) and the British Columbia Transmission Corporation (BCTC).