Knowledge based identification of PCB transformers in power systems

在NSERC合作研究与开发（CRD）计划的提案中，我们提出了一种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，以去除PCB污染。众所周知，多氯联苯对人体健康和环境有害。目前在加拿大使用的PCB变压器中含有约82%的PCB，而askarel（一般为40-80% PCB）大量含有在数万台使用中的变压器和数千台存储中的变压器中。仅在不列颠哥伦比亚省，就有5000多台变压器。虽然PCB变压器在1986年之后没有生产，但由于它们的预期寿命为50年，因此今天使用的大量变压器仍然含有PCB。由于每个（高压）变压器的成本在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，没有公用事业公司可以在经济上负担得起这样做。然而，《斯德哥尔摩公约》缔约方有义务在2025年之前逐步停止在设备中使用多氯联苯。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。通过该研究项目开发的解决方案将极大地鼓励PCB所有者，如加拿大各地的电力公司，通过最小化所涉及的成本和最大化现有设备的再利用来加快淘汰PCB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（btc）联合开发。

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).