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首页> 外文期刊>International journal of electrical power and energy systems >Dynamic rating assists cost-effective expansion of wind farms by utilizing the hidden capacity of transformers
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Dynamic rating assists cost-effective expansion of wind farms by utilizing the hidden capacity of transformers

机译：动态评级通过利用变压器的隐藏能力，有助于促进风电场的成本效益扩展

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摘要

Dynamic rating of power transmission devices is a technology that allows better equipment utilization through real-time monitoring of the weather conditions and the load. Dynamic rating of transformers is a fairly new technology if compared to the dynamic rating of power lines, and has a high potential for significantly improving component utilization while lowering investment costs on installing new transformers.The following work investigates how to utilize already operational transformers, which are used for wind farm connection, for expanding wind generation capacity. Also, this paper shows improvements that dynamic transformer rating can bring to both power grid operators and wind farm owners by exploring the economic benefits of expanding wind parks without investing in new power transformers. Connecting additional wind turbines at sites with high wind potential after the wind park is already in exploitation can assist in lowering electricity price and provide a possibility of less risky investment in the wind energy sector. This paper uses transformer thermal modelling and wind farm expansion techniques such as convolution method and product method to investigate to which extent existing wind farms can be expanded using already installed transformer units.Five transformer locations and nine units are studied for finding the potential of dynamic transformer rating for network expansion applications. The analysis shows that the optimal expansion of wind power from a generator perspective is around 30% to 50%, although, it can be limited further by network restrictions. A possibility to use a large component, such as power transformer, closer to its full potential can provide material and cost savings for building new devices and decrease investment costs on manufacturing, transportation and installation of new units. Dynamic rating of power transformers can also increase the socio-economic benefits of renewable energy by lowering electricity price from renewables and incentivize an increased share of green power in electricity markets.
机译：动力传输设备的动态额定值是一种技术，可以通过对天气条件和负载的实时监控更好的设备利用。与电力线的动态额定值相比，变压器的动态额定值是一个相当新的技术，并且具有显着提高元件利用的高潜力，同时降低了在安装新变压器上的投资成本。以下工作调查了如何利用已使用已使用的操作变压器用于拓展风电场连接，用于扩大风力。此外，本文展示了通过探索扩展风园的经济效益，可以改善动态变压器等级，可以通过探索在不投资新的电力变压器的情况下扩展风园的经济效益。在风园已经开采后，将额外的风力涡轮机连接到高风电位后，可以帮助降低电价，并提供风力能源领域的风险更少的可能性。本文采用变压器热建模和风电场扩展技术，如卷积方法和产品方法，以研究现有的风电场可以使用已安装的变压器单元扩展。研究变压器位置和九个单位用于找到动态变压器的电位网络扩展应用的评级。分析表明，来自发电机透视的风力的最佳膨胀约为30％至50％，但是，它可以通过网络限制进一步限制。使用大型部件（如电源变压器）的可能性更接近其全潜力，可以为建立新设备提供材料和成本节约，并降低制造，运输和安装新单位的投资成本。电力变压器的动态额定值还可以通过降低可再生能源的电价，并激励电力市场中的绿色电力份额增加，增加可再生能源的社会经济益处。

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