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首页> 外文会议>Conseil International des Grands Reseaux Electriques;International Council on Large Electric Systems;CIGRE session >Dry-type subtransmission transformer: compact and safe indoor substations
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Dry-type subtransmission transformer: compact and safe indoor substations

机译：干式变电站变压器：紧凑安全的室内变电站

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Dry-type transformers are usually only available for distribution applications for voltages up to 36 kV. The development of a dry-type transformer for the 72.5 kV voltage class, the related development activities, dielectric simulations, and the results of qualification testing have already been reported at previous CIGRE and other events.The dry-type transformers offer the same functionality as liquid-immersed transformers. The super-iority of dry-type transformers with respect to safety for people, property and the environment makes them the ideal choice for installations in urban substations, substations located close to or in public or private buildings, like e.g. hospitals or datacenters, underground substations, installations in caverns, power generation plants, water protection areas and for areas with increased fire risk or for mobile substations. It is possible now to use new concepts for indoor substations without the need for costly protection means and excluding the residual risks related to liquid-filled transformers. Inner city areas can easily be supplied at higher voltage, allowing to provide higher power density and reducing the energy losses on the transmission to the city substations.Production and delivery of a number of dry-type transformers for subtransmission has meanwhile taken place. We present in the paper a number of different realized or planned configurations for indoor and outdoor installations, the related components, and the experience gathered while installing the transformers and taking them into operation. A 69 kV/25 MVA indoor substation installation in a sports stadium in Brazil and a 45 kV/16 MVA outdoor installation in Sweden are presented in detail. In both cases the transformers are equipped with a dry-type on-load tap changer, offering a total regulation range of 20%.Combining dry-type transformers with gas-insulated or hybrid gas-insulated switchgear allows very compact and safe indoor substations. Such installations can be placed in the basement of any building. Conceptual outlines are presented in the paper.Fire and explosion safety is key for such installations. Dry-type transformers of F1 fire class fulfill these requirements and are self-extinguishing. The paper describes why this is the case.
机译：干式变压器通常仅适用于电压高达36 kV的配电应用。在之前的CIGRE和其他活动中，已经报道了针对72.5 kV电压等级的干式变压器的开发，相关的开发活动，介电模拟以及合格测试的结果。 干式变压器提供的功能与液浸式变压器相同。干式变压器在人员，财产和环境安全方面的优势使其成为城市变电站，靠近或位于公共或私人建筑中的变电站等安装的理想选择。医院或数据中心，地下变电站，山洞中的设施，发电厂，水保护区域以及火灾风险增加的区域或移动变电站。现在有可能在室内变电站中使用新的概念，而无需昂贵的保护手段，并且排除了与充液变压器相关的残留风险。可以很容易地以较高的电压为市区内的区域供电，从而可以提供较高的功率密度，并减少传输到市区变电站的能量损失。 同时，已经进行了许多用于子传输的干式变压器的生产和交付。在本文中，我们介绍了用于室内和室外安装的许多不同的已实现或计划的配置，相关组件以及在安装和投入使用变压器过程中积累的经验。详细介绍了巴西体育馆内的69 kV / 25 MVA室内变电站安装和瑞典的45kV / 16 MVA室外变电站安装。在这两种情况下，变压器都配有干式有载分接开关，总调节范围为20％。 将干式变压器与气体绝缘或混合气体绝缘开关设备结合使用，可实现非常紧凑和安全的室内变电站。这样的装置可以放置在任何建筑物的地下室中。本文介绍了概念轮廓。 消防和爆炸安全是此类安装的关键。 F1防火等级的干式变压器满足这些要求，并且具有自熄性。本文描述了为什么会这样。

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