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Pham, C.-T. & Månsson, D. (2019). A Study on Realistic Energy Storage Systems for the Privacy of Smart Meter Readings of Residential Users. IEEE Access, 7, 150262-150270
Open this publication in new window or tab >>A Study on Realistic Energy Storage Systems for the Privacy of Smart Meter Readings of Residential Users
2019 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 7, p. 150262-150270Article in journal (Refereed) Published
Abstract [en]

The introduction of smart meters sparked concerns about privacy breach through real-time monitoring of electric power consumption. Valuable private information about occupancy, behaviour, health, religion and wealth can be extracted from the user’s power profile which urges measurements to protect the integrity of the user. One physical mitigation technique to assure privacy is explored using energy storage systems. Real energy storage technologies are limited in their energy capacities and power capabilities, which have to be appropriately sized to fulfil their role. This paper analyses and compares different energy storage technologies (li-ion, lead-acid, electric double layer capacitor and flywheel) for the protection of residential users by estimating the minimal required capacities and costs for both single and multiple user cases. The analysis is based on actual measured user data from the REDD data set. The results show that the integrity can be protected with reasonable capacities and investments ranging in the margin of market available products.

Place, publisher, year, edition, pages
Adelaide SA 5005, Australia: IEEE, 2019
Keywords
Energy storage system, Privacy, Smart meters, Power demand, Lead acid batteries
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-263088 (URN)10.1109/ACCESS.2019.2946027 (DOI)
Funder
Swedish Energy Agency, P43019-1
Note

QC 20191107

Available from: 2019-10-29 Created: 2019-10-29 Last updated: 2019-11-07Bibliographically approved
Pham, C.-T. & Månsson, D. (2019). Assessment of energy storage systems for power system applications via suitability index approach (Part IV). Journal of Energy Storage, 24, Article ID 100777.
Open this publication in new window or tab >>Assessment of energy storage systems for power system applications via suitability index approach (Part IV)
2019 (English)In: Journal of Energy Storage, E-ISSN 2352-152X, Vol. 24, article id 100777Article in journal (Refereed) Published
Abstract [en]

Energy storage systems provide several benefits and services in optimizing the power grid's reliability, efficiencyand safety. However, the feasibility of energy storage systems varies dependent on the requirements of theapplications. Technical limitations in design and type of the storage technology prevents a single storage type toperform equally well in all situations. Hence, it is essential to compare and measure the energy storages’ usefulnessand determine their optimal use. To address this issue this study introduces an indexing approach toevaluate the suitability of energy storages for power system applications. Four different energy storages (doublelayercapacitor, flywheel, lead–acid battery, lithium-ion battery) are tested for four typical energy storage applications(frequency regulation, voltage support, capacity firming and energy time-shift). The suitability indexallows a simple and intuitive way to compare and rank the suitability of energy storages.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Energy storage, Assessment, Li-ion battery, Lead–acid battery, Double-layer capacitor, Flywheel, Power system application, Suitability index
National Category
Energy Systems Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-254175 (URN)10.1016/j.est.2019.100777 (DOI)000481671900036 ()2-s2.0-85066091663 (Scopus ID)
Projects
StandUp for Energy
Note

QC 20190823

Available from: 2019-06-20 Created: 2019-06-20 Last updated: 2019-09-05Bibliographically approved
Pham, C.-T. & Månsson, D. (2018). Experimental validation of a general energy storage modelling approach(Part III). Journal of Energy Storage, 20, 542-550
Open this publication in new window or tab >>Experimental validation of a general energy storage modelling approach(Part III)
2018 (English)In: Journal of Energy Storage, E-ISSN 2352-152X, Vol. 20, p. 542-550Article in journal (Refereed) Published
Abstract [en]

Current challenges in the electric grid progression demand energy storages to cope with any imbalances betweensupply and demand side. Application possibilities of energy storages are numerous, but the requirements varyfrom case to case. However, not every storage technology operates equally to be useful in any situation. In fact,the feasibility of energy storages depend on their technical characteristics, i.e., for example efficiency, responsetimes, power rating and capacity for a selected application. Comparing and assessing different storage options isimperative for decision-making, which requires an in-depth understanding of the technology and its dynamics.Hence, a general model approach of energy storages as equivalent circuit models has been proposed to unify andanalyze storages of different physical backgrounds. This allows a more direct and intuitive evaluation of energystorages tested in a specific application. This paper focuses on the experimental validation of energy storages(ultra-capacitor, li-ion battery, lead-acid battery and flywheel) to be uniformly described in one general model. Asimple and budget friendly experimental setup to test the storages is designed.

Keywords
Energy storage, Li-ion battery, Lead-acid battery, Double-layer capacitor, Flywheel, Equivalent circuit
National Category
Energy Systems
Research subject
Electrical Engineering; Energy Technology
Identifiers
urn:nbn:se:kth:diva-238589 (URN)10.1016/j.est.2018.09.023 (DOI)000451147100052 ()2-s2.0-85055878495 (Scopus ID)
Projects
STand UP for Energy
Note

QC 20181106

Available from: 2018-11-05 Created: 2018-11-05 Last updated: 2018-12-18Bibliographically approved
Holmin, S., Kurlberg, P. & Månsson, D. (2018). On the free path length distribution for linear motion in an n-dimensional box. Journal of Physics A: Mathematical and Theoretical, 51(46), Article ID 465201.
Open this publication in new window or tab >>On the free path length distribution for linear motion in an n-dimensional box
2018 (English)In: Journal of Physics A: Mathematical and Theoretical, ISSN 1751-8113, E-ISSN 1751-8121, Vol. 51, no 46, article id 465201Article in journal (Refereed) Published
Abstract [en]

We consider the distribution of free path lengths, or the distance between consecutive bounces of random particles, in an n-dimensional rectangular box. If each particle travels a distance R, then, as R -> infinity the free path length coincides with the distribution of the length of the intersection of a random line with the box (for a natural ensemble of random lines) and we give an explicit formula (piecewise real analytic) for the probability density function in dimension two and three. In dimension two we also consider a closely related model where each particle is allowed to bounce N times, as N -> infinity, and give an explicit (again piecewise real analytic) formula for its probability density function. Further, in both models we can recover the side lengths of the box from the location of the discontinuities of the probability density functions.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD, 2018
Keywords
free, path, length, distribution
National Category
Mathematics
Identifiers
urn:nbn:se:kth:diva-246299 (URN)10.1088/1751-8121/aae5ee (DOI)000460029900001 ()2-s2.0-85055489270 (Scopus ID)
Note

QC 20190321

Available from: 2019-03-22 Created: 2019-03-22 Last updated: 2019-05-13Bibliographically approved
Pham, C.-T. & Månsson, D. (2018). Optimal energy storage sizing using equivalent circuit modelling for prosumer applications (Part II). Journal of Energy Storage, 18, 1-15
Open this publication in new window or tab >>Optimal energy storage sizing using equivalent circuit modelling for prosumer applications (Part II)
2018 (English)In: Journal of Energy Storage, Vol. 18, p. 1-15Article in journal, Editorial material (Refereed) Published
Abstract [en]

An optimal system design indirectly implies efficient use of available resources, i.e., minimum investment to achieve the desired outcome. An increased demand of energy storages highlights the importance of efficient useand optimal storage sizing. However, the variety of available and newly developed storage technologies complicates decision-making in choosing the appropriate technology to the compatible application. The characterizationof storage types extends to the inherent dynamic behavior and technical limitations, which is imperativefor storage system design. This paper proposes a brute-force method of optimal storage system sizing based onthe equivalent circuit modeling while considering storage's operation constraints. The sizing routine is applied to a set of different energy storage technologies (lead-acid, Li-ion, vanadium-redox flow battery, double-layercapacitor, flywheel) to balance the energy demand of a single-family building supported by a 3.36 kWpeak photovoltaic system. This case focuses on the energy management application of energy storages. Additionally, asuitability index is introduced to determine the applicability of the investigated storages in reference to an ideal case.

Keywords
Optimization, Energy storage, Brute-force method, Equivalent circuit
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-227174 (URN)10.1016/j.est.2018.04.015 (DOI)000439496500001 ()2-s2.0-85046370323 (Scopus ID)
Projects
StandUp for Energy
Note

QC 20180612

Available from: 2018-05-03 Created: 2018-05-03 Last updated: 2018-12-11Bibliographically approved
Avula, R. R., Oechtering, T. J. & Månsson, D. (2018). Privacy-preserving smart meter control strategy including energy storage losses. In: Proceedings - 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018: . Paper presented at 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018; Sarajevo; Bosnia and Herzegovina; 21 October 2018 through 25 October 2018. Institute of Electrical and Electronics Engineers (IEEE), Article ID 8571537.
Open this publication in new window or tab >>Privacy-preserving smart meter control strategy including energy storage losses
2018 (English)In: Proceedings - 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018, Institute of Electrical and Electronics Engineers (IEEE), 2018, article id 8571537Conference paper, Published paper (Refereed)
Abstract [en]

Privacy-preserving smart meter control strategies proposed in the literature so far make some ideal assumptions such as instantaneous control without delay, lossless energy storage systems etc. In this paper, we present a one-step-ahead predictive control strategy using Bayesian risk to measure and control privacy leakage with an energy storage system. The controller estimates energy state using a three-circuit energy storage model to account for steady-state energy losses. With numerical experiments, the controller is evaluated with real household consumption data using a state-of-the-art adversarial algorithm. Results show that the state estimation of the energy storage system significantly affects the controller's performance. The results also show that the privacy leakage can be effectively reduced using an energy storage system but at the expense of energy loss.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Series
IEEE PES Innovative Smart Grid Technologies Conference Europe, ISSN 2165-4816
Keywords
Smart meter privacy, Bayesian hypothesis testing, partially observable Markov decision process (PO-MDP), energy storage losses, dynamic programming
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-245088 (URN)000458690200049 ()2-s2.0-85060221839 (Scopus ID)978-1-5386-4505-5 (ISBN)
Conference
2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018; Sarajevo; Bosnia and Herzegovina; 21 October 2018 through 25 October 2018
Note

QC 20190306

Available from: 2019-03-06 Created: 2019-03-06 Last updated: 2019-04-29Bibliographically approved
Pham, C.-T., Månsson, D., Hilber, P. & Shayesteh, E. (2018). Reliability consideration in the energy storagesystem design process. In: 2018 IEEE International Conference on Probabilistic Methods Applied to Power Systems (PMAPS): . Paper presented at 2018 IEEE International Conference on Probabilistic Methods Applied to Power Systems (PMAPS). IEEE
Open this publication in new window or tab >>Reliability consideration in the energy storagesystem design process
2018 (English)In: 2018 IEEE International Conference on Probabilistic Methods Applied to Power Systems (PMAPS), IEEE, 2018Conference paper, Published paper (Refereed)
Abstract [en]

Energy storage systems are an important asset inthe future power grid, ensuring the safety and reliability inface of growing power consumption and intermittent supply.Occupying a vital role, the reliability of the storage system itselfhas to be guaranteed and taken into account for, especially inthe design procedure. This study utilizes reliability methods toanalyze the storage’s system reliability and optimize the systemsize to an appropriate level. A residential building with a 3.3kWphotovoltaic system serves as a case study to analyze differentenergy storage types and their resulting optimum systemstructure. The paper also includes an economic evaluation tomeasure the storage’s suitability for the particular case with thephotovoltaic system.

Place, publisher, year, edition, pages
IEEE, 2018
Keywords
Energy storage system;reliability;Simulation.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering; Energy Technology
Identifiers
urn:nbn:se:kth:diva-234661 (URN)10.1109/PMAPS.2018.8440422 (DOI)2-s2.0-85053164028 (Scopus ID)978-1-5386-3596-4 (ISBN)
Conference
2018 IEEE International Conference on Probabilistic Methods Applied to Power Systems (PMAPS)
Projects
StandUp for Energy
Note

QC 20180921

Available from: 2018-09-07 Created: 2018-09-07 Last updated: 2018-09-21Bibliographically approved
Månsson, D. (2018). Sizing Energy Storage Systems used to Improve Privacy from Smart Meter Readings for Users in Sweden. In: Proceedings - 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018: . Paper presented at 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018; Sarajevo; Bosnia and Herzegovina; 21 October 2018 through 25 October 2018. Institute of Electrical and Electronics Engineers (IEEE), Article ID 8571456.
Open this publication in new window or tab >>Sizing Energy Storage Systems used to Improve Privacy from Smart Meter Readings for Users in Sweden
2018 (English)In: Proceedings - 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018, Institute of Electrical and Electronics Engineers (IEEE), 2018, article id 8571456Conference paper, Published paper (Refereed)
Abstract [en]

The smart power grid of the future will be heavily dependent on accurate information from the users via smart meter readings. However, from the information on the users power profile much knowledge about the behavior can be acquired, resulting in a breach of privacy. To mask the power profile an energy storage system can be used that obfuscates the smart meter readings. In this paper, we investigate the storage capacity needed if the smart meter is required to report a constant power usage for the user, electricity as well as distributed heating, to the utility. Both single and multiple users per energy storage system are investigated using both derived as well as measured power profiles.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Series
IEEE PES Innovative Smart Grid Technologies Conference Europe, ISSN 2165-4816
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-245089 (URN)10.1109/ISGTEurope.2018.8571456 (DOI)000458690200017 ()2-s2.0-85060201096 (Scopus ID)978-1-5386-4505-5 (ISBN)
Conference
2018 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2018; Sarajevo; Bosnia and Herzegovina; 21 October 2018 through 25 October 2018
Note

QC 20190306

Available from: 2019-03-06 Created: 2019-03-06 Last updated: 2019-03-06Bibliographically approved
Li, B. & Månsson, D. (2017). Effect of Periodicity in Frequency Responses of Networks From Conducted EMI. IEEE transactions on electromagnetic compatibility (Print), 59(6), 1897-1905
Open this publication in new window or tab >>Effect of Periodicity in Frequency Responses of Networks From Conducted EMI
2017 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 59, no 6, p. 1897-1905Article in journal (Refereed) Published
Abstract [en]

In this paper, we consider different types of networks, and investigate the characteristics of the frequency responses of loads, which are distributed in the networks. Without loss of generality, both frequency-independent and frequency-dependent loads are discussed, respectively. Beginning with a transmission-line (TL) network with frequency-independent loads, via the TL theory and Baum-Liu-Tesche equation, we demonstrate that the frequency responses are periodic in the frequency domain, where the periodicity is derived and verified. Subsequently, our study is extended to the complex networks that consist of multiple junctions and branches. By using the statistical method, we generate random loads with different attributes, i.e., resistive, inductive, or capacitive, and mainly study the effect of the number of branches and junctions on the frequency response of targeted load in various networks. From the perspective of protections for the targeted load in networks, results indicate that, for lossless and good dielectric (i.e., low-loss) media, it is crucial to consider the frequency responses at the critical frequencies in a periodical manner, rather than at a single frequency. Furthermore, it is worth noting that, the frequency response of targeted load behaves differently when varying the attributes of other loads in the network. The variation of network topology, i.e., increasing the number of junctions or branches, also influences the frequency response.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2017
Keywords
Frequency-dependent load impedance, frequency response, intentional electromagnetic interference (IEMI), network
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-214298 (URN)10.1109/TEMC.2017.2689924 (DOI)000408335300030 ()2-s2.0-85018622641 (Scopus ID)
Note

QC 20170913

Available from: 2017-09-13 Created: 2017-09-13 Last updated: 2017-09-21Bibliographically approved
Månsson, D. (2016). Energy storage for a future smart grid: Docent presentation video. KTH Royal Institute of Technology
Open this publication in new window or tab >>Energy storage for a future smart grid: Docent presentation video
2016 (English)Other (Other academic)
Place, publisher, year, pages
KTH Royal Institute of Technology, 2016. p. 20
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-188220 (URN)
Funder
StandUp
Note

QC 20160613

Available from: 2016-06-09 Created: 2016-06-09 Last updated: 2016-06-13Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4740-1832

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