Small power tapping from HVDC transmission systems: a novel approach

The first commercial success in HVDe transmission was made in 1954 and it has since become popular as attempts have also been made to tap energy from the HVDe line itself. This paper discusses technical issues that are related to series energy tapping options for HVDe lines, with possible solutions. The performance and behavior of four different design options for a 2 MW series tap are investigated through simulations. Results are presented with comparisons, highlighting the key characteristics of each design, as proof of concept and as well as to demonstrate that series power tapping from HVDe lines is viable.

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“…In [12], GTOs are suggested as switching devices. A full bridge of four GTO's are used to send pulses to a transformer.…”

Section: Previously Proposed Tapsmentioning

confidence: 99%

“…In the schemes proposed in [12] and [13] air-cored trans formers were used. The air-core transformer was considered as a suitable solution.…”

Section: A Transformermentioning

confidence: 99%

An investigation into series power tapping options of HVDC transmission lines

Hartshorne

Mouton

Madawala

2013

2013 1st International Future Energy Electronics Conference (IFEEC)

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“…Generally, the small tapping station should have a low cost and should not propagate the fault of local side to the main HVDC circuit side [11] . Conventionally, single DC/AC converter followed by a step down transformer can be used as a shunt tap.…”

Section: Introductionmentioning

confidence: 99%

Prototype design and experimental verification of an isolated modular dc/dc converter system

Zhang

Wang

et al. 2016

12th IET International Conference on AC and DC Power Transmission (ACDC 2016)

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This paper details design, development and control methods of an isolated modular DC/DC converter (IMDCC) system. A 10kW downscaled prototype is constructed to show the working principles, hardware design procedures, and control circuits implementation. In this prototype, there are two MMC stations, namely the inverter end and the rectifier end, each consisting of N half-bridge (HB) sub-modules (SMs). Each phase is controlled by an independent phase controller while both stations are controlled by a central controller. Moreover, the management and communication methods of these SMs are also illustrated. Further, the control principles for the single-phase and three-phase IMDCC system are presented respectively to achieve power regulation and balance all the SM capacitor voltages. Finally, experimental results are given to verify the validity of the circuit design and show the effectiveness of the control methods for both singlephase and three-phase IMDCC.

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“…i b is the current through the converter, L wf is the inductance value and r wf is the parasitic resistance of the coupling inductances. The full-rated converter also includes a Dynamic Breaking Resistor (DBR), modelled as a current source, described by equation (8).…”

Section: Generator Side Vscmentioning

confidence: 99%

“…However, one important drawback of HVDC is the difficulty of supplying or injecting reduced amount of power in the vicinity of the HVDC corridor. The HVDC tapping station is a possible solution to overcome this issue [6], [7], [8]. These HVDC taps can be designed to be bidirectional, thus they are able to inject or consume power.…”

Section: Introductionmentioning

confidence: 99%