Impacts of tap stagger on currents of power transformers

Wang, Dongmiao; Li, Linwei Chen Haiyu; Wang, Zhongdong; Turnham, Victoria

doi:10.1109/isgteurope.2017.8260204

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…As the taps are changed, one ATR takes more load, and the other ATR takes less load. This implies that the unbalance in OLTC positions must be limited and, consequently, a lower reactive power can be ab-sorbed compared with the maximum reactive power absorbed in the no-load mode [12]. Also, in the under-load mode, the currents circulating in the two machines must be continuously controlled.…”

Section: Tap Staggering With Normally Loaded Atrsmentioning

confidence: 99%

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Actions to Handle Increasing Distributed Generation and Rising Voltage during Low-Demand Periods: Tap Staggering Practices and Field Tests in the Italian Transmission Network

Quaia,

Mauri,

Marchesin

et al. 2023

Energies

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This paper deals with the voltage regulation strategies implemented in the Italian transmission network to face the increasing problem of high voltages during time periods characterized by low demand. After an introduction in which this very actual problem is discussed, the focus is on tap staggering practices. Although tap staggering is not a new idea, it is gaining practical importance only in the very last few years as a means of enhancing the inductive power drawn from the grid and, therefore, limiting the voltage rise. Accordingly, tap staggering contributes to the mitigation of the problems caused by the increasing penetration of renewable energy sources and thus can allow an increase in the share of renewable energy sources. The paper presents the different tap staggering practices that are being defined by the Italian transmission system operator and reports some tap staggering tests recently performed on large autotransformers as well as phase-shifter transformers.

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Section: Tap Staggering With Normally Loaded Atrsmentioning

confidence: 99%

“…In principle, TS can also be performed by exploiting the normal layout of the primary substations (owned by the distribution system operators, DSO), which include two HV/MV TRSs in parallel [7,11,12]. However, in this case, the benefits mainly concern the upstream TSO HV network, whereas TS is performed by DSO machines.…”

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confidence: 99%