电力电缆实时载流量评估系统设计

为了提高电力电缆的利用率,合理调配电缆的实时负荷,利用实时环境参数监测终端、GPRS数据传输模块和上位机构成了高压电力电缆实时载流量评估系统。并利用DS18B20、风力传感器、土壤温湿度传感器、光照传感器和STM32嵌入式单片机对环境参数进行实时监测,实现了对环境温度、土壤湿度、土壤温度、环境风力、环境光照等参数的实时采集,并利用GPRS数据传输模块将环境参数传送到上位机,利用上位机结合VB6.0和ANSYS编制了高压电力电缆温度场和载流量计算软件,实现了电力电缆参数数据库存储、敷设模式界面化操作、环境参数的实时监测与显示、实时动态载流量的在线计算等功能。计算结果表明,高压电力电缆的实时动态载流量系统能够准确计算出受环境参数影响的高压电力电缆的载流量,提高了计算效率,为电力部门调配电缆的实时负荷提供了依据。     

The electric vehicle revolution: Critical material supply chains,trade and development

The emergence of a mass market for electric vehicles (EVs) offers development opportunities for countries that have abundant resources of cobalt, nickel, lithium, copper, aluminium and manganese. Not surprisingly, developing countries have proposed ambitious plans to expand production of these raw materials. However, an observation from the resource curse literature is that strong institutions are required if they are to mitigate the risk of poorly directed, often excessively procyclical, investment, not least because of the complexity, opacity and price volatility of many raw materials utilised by global EV value chains. This paper examines the outlook for EV demand and associated raw material usage paying attention to the drivers and sensitivities required to assess and track future market transformations. These end use shifts are then placed in the context of the broader supply chain adjustments and trends shaping the demand. For resource exporters, adapting to structural change will require fiscal, regulatory, environmental and institution reforms designed to capture shifting patterns of resource wealth in a way which takes appropriate account of comparative advantages in specific value chains and mitigates adverse environmental and social consequences from their extraction and processing.