ON-LOAD VOLTAGE REGULATION IN THE LOW VOLTAGE GRID
In the electrical distribution grids the complexity of power flow increases due to increasing penetration with small and distributed power generation plants.In the future distribution system operators (DSOs) are requested to build up an efficient and up to date grid infrastructure by integrating the end consumers with their fluctuating power generation,their load and their storage capabilities in the system.In most European countries government subventions and the obligation to connect small solar and bio mass power generation lead to necessary extensions and strengthening of the LV grids.Depending on the generation and load scenarios in the LV and MV grids,a fluctuation of the power flow is expected,which can even result in back-feeding power into the MV and HV grid.This causes large voltage fluctuation in the grid.One possibility to remain compliant with the reduced voltage range of +/- 10% according EN 50160 in grids with a high share of distributed generation is the use of a regulated distribution transformer.Especially in the case of homogeneous grids this measure is promising.Thereby the challenge is the development of an on-load voltage regulation for distribution transformers by keeping the accustomed performance and dimensions to ensure the changeability und comprehensive operation wherever its needed.Siemens AG has developed a regulated distribution transformer with an on-load voltage regulation on the low voltage side which fulfills all these requirements.Together with the German DSO E.ON Mitte AG a functional model was installed and field tested in an existing grid.
Ronald SCHMID Ralf-Dirk WALZ Kai BOLDT Holger M(U)LLER Karsten HANDT Gyula HIPSZKI
Siemens AG-Germany E.ON Mitte AG-Germany Siemens Zrt.-Hungary
国际会议
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2012-09-05（万方平台首次上网日期，不代表论文的发表时间）