Common Application Platform for Low Voltage Network Management

低压网络管理通用应用平台

• 批准号: EP/N508421/1
• 负责人: Qiang Liu
• 金额: $ 19.1万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN508421%2F1
• 关键词: Common; Application; Platform; Low; Voltage

In this proposal, both laboratory testing and thermal modelling will be carried out to refine and validate the dynamic thermalrating (DTR) algorithm for low voltage (LV) distribution transformers in order to cope with future dynamic loading scenarioscaused by dispersed generations, electric vehicles, heat pumps and etc.A specially commissioned 11kV/0.433kV three phase distribution transformer will be manufactured with multiple opticalfibre sensors embedded in the transformer winding during the manufacturing process. This transformer will be used as thetesting object in the laboratory. Thermal rating and life assessment of a transformer are dependent on the hotspottemperature inside the transformer. While the hotspot location is usually assumed to be near to the top position of thewinding, due to the exposure to the maximum leakage field and the high surrounding oil temperature, previous experiencehas shown that this is not necessarily the case and it could be located at lower conductor positions. Therefore multiplesensors will be installed at the top region of each winding to capture the hotspot temperature. In addition, top oil and bottomoil temperatures inside the transformer will be monitored. Extra condition monitoring measures used by the industry todetermine the health condition of transformers, e.g. on-line Dissolved Gas Analysis Monitor (already available in thelaboratory) will be applied during the tests to provide complementary information.The temperature rise tests will be implemented in two stages. First, prolonged heat run tests will be conducted undermultiple levels of constant loadings, such as 70%, 100% and 120% of rated loadings. The thermal parameters required inthe IEC thermal model for calculating the hottest spot temperature, can be refined based on the heat run test results.Second, a series of dynamic load profiles obtained from the load analysis and forecast algorithm will be applied in the heatrun tests to verify the thermal model and its parameters. The developed DTR algorithm of distribution transformers wouldbe able to cope with future predictable and un-predictable loading scenarios in LV networks.

在该提案中，将进行实验室测试和热建模，以完善和验证低压（LV）配电变压器的动态热额定值（DTR）算法，以应对未来由分散发电、电动汽车、热量引起的动态负载场景。专门调试的11kV/0.433kV三相配电变压器将在制造过程中在变压器绕组中嵌入多个光纤传感器。该变压器将作为实验室的测试对象。变压器的热额定值和寿命评估取决于变压器内部的热点温度。虽然热点位置通常被假设为靠近绕组的顶部位置，但由于暴露于最大泄漏场和周围油温较高，以往的经验表明情况并非一定如此，它可以位于较低的位置。导体位置。因此，将在每个绕组的顶部区域安装多个传感器来捕获热点温度。此外，还将监测变压器内的顶部油和底部油温度。行业使用额外的状态监测措施来确定变压器的健康状况，例如测试期间将应用在线溶解气体分析监测仪（实验室已有）以提供补充信息。温升测试将分两个阶段进行。首先，将在多个级别的恒定负载下进行长时间的热运行测试，例如额定负载的70%、100%和120%。 IEC热模型中计算最热点温度所需的热参数可以根据热运行测试结果进行细化。其次，从负载分析和预测算法获得的一系列动态负载曲线将应用于热运行测试中验证热模型及其参数。所开发的配电变压器DTR算法将能够应对低压网络中未来可预测和不可预测的负载场景。

项目成果

EXPERIMENTAL STUDY OF DYNAMIC THERMAL BEHAVIOUR OF AN 11 KV DISTRIBUTION TRANSFORMER

11KV配电变压器动态热行为实验研究

• 发表时间: 2017
• 作者: Villarroel R

Improvement of dynamic thermal rating algorithm for distribution transformers (Poster presentation)

配电变压器动态热额定值算法的改进（海报展示）

• 发表时间: 2016
• 作者: Villarroel, R.