Knowledge based identification of PCB transformers in power systems

在NSERC合作研究与发展（CRD）计划的这一建议中，我们提出了一个基于知识的采样方法来识别多氯联苯（简称PCB）污染的变压器的PCB去污。已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多氯联苯的约82%[3]，而阿斯卡雷（通常为40-80%的多氯联苯）主要存在于数万台在役变压器和数千台库存变压器中。仅在不列颠哥伦比亚省，就有5000多台变压器。虽然多氯联苯变压器在1986年之后就不再生产了，但由于其预期寿命为50年，目前使用的大量变压器仍然含有多氯联苯。由于每个（高压）Transformer的成本在1-5百万美元的范围内，更换所有现有的PCB变压器是不切实际的，并且没有公用事业公司能够在经济上负担得起这样做。然而，《斯德哥尔摩公约》[2]的缔约方有义务在2025年之前逐步淘汰设备中的多氯联苯。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接触，通过这一研究项目制定的解决方案将大大鼓励多氯联苯所有者，如加拿大各地的电力公司，通过最大限度地减少所涉费用和最大限度地重新利用现有设备来加快淘汰多氯联苯设备。该提案由西蒙弗雷泽大学（SFU）和不列颠哥伦比亚省输电公司（BCTC）共同开发。

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).