Real-time control and protection of the NEPTUNE power system

Schneider, Kevin P.; Liu, Chen‐Ching; McGinnis, T.; Howe, Bruce M.; Kirkham, Harold

doi:10.1109/oceans.2002.1191906

Cited by 18 publications

(13 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results in the operation of constant power loads with current limited sources and solar arrays have been reported in the literature [9]. Though a good discussion of the stability limits for remote instrumentation systems is provided in [13] and [14], the implications of these limits on the operation of the system have not been assessed. For example, the jump phenomenon during startup in the operation of the switching regulator at the end of a long cable is not considered in these references.…”

Section: Switching Regulator At the End Of A Long Cablementioning

confidence: 66%

“…Rather, the accuracy of the DC system prediction as compared to experimental results is examined. The jump in remote-end voltage during startup can be estimated by using (6) to be V V (13) The startup behavior was also studied experimentally for other rated load powers of 17 and 60 W. The startup resistance as seen at the remote-end was approximately constant at 120 through the entire experiment. It should be noted that this is an approximation, with the assumption that the remote-end voltage and current are sinusoidal, though in practice both waveforms are distorted.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Power Delivery to Remote Instrumentation

Rajasekaran

Hazen

Heck

2007

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

Long resistive cables used in the operation of remote instrumentation impose fundamental limits on the amount of power delivered. Due to their constant-power load profile, switching regulators pose unique problems when operated at the end of long resistive cables. Some of the problems associated with the operation of switching regulators in these systems include limitations on power delivered at the remote-end, voltage jumps at startup and startup load cycling. Analytical calculations and experimental results are provided to validate the previously mentioned phenomena. Two new methods of power delivery based on state feedback control and parallel operation of switching and linear regulators to enhance stability and increase the power delivered at the remote-end are proposed and validated experimentally.

show abstract

Section: Switching Regulator At the End Of A Long Cablementioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Power Delivery to Remote Instrumentation

Rajasekaran

Hazen

Heck

2007

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…This is particularly true with the intrinsically high resistance of COTS submarine telecommunications cable on a large multinode system which results in substantial voltage fluctuations across the network as the loads vary. The challenges of state estimation and power management in a large multi-node observatory are described by Schneider et al (2002) and Liu et al (2003). In addition, the NEPTUNE power design includes novel autonomous backbone breakers at each node which serve to isolate faulted sections of cable independent of node functionality, although the entire observatory power system must be turned down to accomplish this.…”

Section: A Generic Cabled Ocean Observatorymentioning

confidence: 99%

Cabled Ocean Observatory Systems

Chave¹,

Waterworth²,

Maffei³

et al. 2004

mar technol soc j

View full text Add to dashboard Cite

Future studies of episodic processes in the ocean and earth will require new tools to complement traditional, ship-based, expeditionary science. This will be enabled through the construction of innovative facilities called ocean observatories which provide unprecedented amounts of power and two-way bandwidth to access and control instrument networks in the oceans. The most capable ocean observatories are designed around a submarine fiber optic/power cable connecting one or more seafloor science nodes to the terrestrial power grid and communications backhaul. This paper defines the top level requirements that drive cabled observatory design and the system engineering environment within which a scientifically-capable infrastructure can be implemented. Commercial high reliability submarine telecommunication technologies which will be crucial in the design of long term cabled observatories are then reviewed. The top level architecture of a generic cabled observatory, describing the main subsystems comprising the whole and defining technological approaches to their engineering, is then described, along with some example design choices and tradeoff studies.

show abstract

“…The conventional point to point HVDC topology has N‐0 redundancy with lowest transmission reliability. A high reliability is achieved through redundancy of parts in the traditional power system, where N‐1 and N‐2 are generally accepted for the interconnected transmission systems . In the presented test system, N‐1 redundancy is desired for the transmission part of the subsea DC grid.…”

Section: Introductionmentioning

confidence: 99%

Subsea DC collection grid with high power security for offshore renewables

Jovcic

Zhang

Findlay

et al. 2016

Int. Trans. Electr. Energ. Syst.

View full text Add to dashboard Cite

Summary This paper presents a subsea DC collection grid with renewable power parks which inherently has robust DC fault protection and flexible expansion capability. By virtue of the applied DC/DC converter and the proposed DJ‐Index Clamping control, different sections of the subsea grid are functionally interconnected and in the meantime decoupled in the event of DC faults. The faults are selectively isolated without the need for fast DC circuit breakers and system recovery from the faulty DC intertie branch is achieved by a coordinated operation strategy on DC/DC converters and DC disconnectors (or standard AC circuit breakers). A 200‐MW test system is presented which consists of two 100‐MW renewable energy sources (tidal stream and wind) and DC collection/transmission grids. The simulation results confirm the N‐1 security of the presented topology and good control performance over a range of DC faults. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Real-time control and protection of the NEPTUNE power system

Cited by 18 publications

References 4 publications

Power Delivery to Remote Instrumentation

Power Delivery to Remote Instrumentation

Cabled Ocean Observatory Systems

Subsea DC collection grid with high power security for offshore renewables

Contact Info

Product

Resources

About