Case study lecture on voltage control
On the 5th of December, the Hungarian Chapter of the Power and Energy Society held a lecture to the Joint PES/IAS Student Branch Chapter about current developments in voltage control at distribution network level.
István Táczi shared experiences about a detailed case study conducted by E.ON Hungary, the largest distribution system operator in the country and the Budapest University of Technology and Economics. The goal was to mitiage the voltage rise caused by the local PVs on a low voltage network (with high R/X ratio). To solve the issue cost-effectively, a prototype inline voltage regulator (IVR) was developed in the cooperation (Figure 1.). The primary objective function is to control the effective value of the voltage (decrease when distributed generation is high, increase when local load is high), the secondary functions include further – customizable – power quality improvement possibilities. This enhances the activity of distribution system operators with a flexible smart grid element to meet the customer needs and regulatory restrictions. The main advantages compared to the current state of the art technologies are:
- continuous (no taps, switching transients due to the inverters) control function
- proper filtering (low level of harmonics, quality improvement, neutral point coupled inverters with high switching frequency)
- possible asymmetry compensation
- ~1 ms control time delay (fast operation)
- integrated electrical protection
- quick commissioning and installation, no supply interruption is needed in case of a failure
- remote control, measurement and automatic error handling capability
The prototype successfully reduced the voltage fluctuations. Due to it’s competitive price – compared to installing new transformer stations – this solution will be rolled out in many cases to effectively integrate the growing number of PVs in Hungary.
The students gathered information about current research and innovation activity which was done by a local company and a local university. Also these events are important to keep in touch with the young generation and facilitate their technical development and contacts with IEEE.
Date and Time
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- Budapest University of Technology and Economics
- Budapest, Budapest Fovaros
- Hungary
- Building: V1
Speakers
Istvan Taczi