Power Symmetrical Components as Grid Usage Indicator for Unbalanced Prosumers

Klusáček, Jan; Drápela, Jiří; Langella, R.

doi:10.1109/ichqp53011.2022.9808706

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Furthermore, it has been shown that additional losses can be assessed by measuring the negative and zero sequence power at the PoC of a prosumer with a good approximation. This paper extends the previous study [26], primarily by introducing a further prosumer and obtaining a simple and basic case of an energy community using part of the DS. A set of representative unbalanced steadystate cases is analyzed to compare the performances of RM metrics at various points of the DS and how a prosumer might be charged more fairly for using the grid as a balancer when registering positive sequence power/energy.…”

Section: Introductionmentioning

confidence: 65%

“…It can be observed that KPI reaches values from 1.00 to 1.05 in 90% of the states (see PDF and CDF of the KPI), while PI has a range of -1:1, with a significant concentration around a value of 0.5. In the remaining 10% of the states, KPI goes from 1.05 up to 1.10, but the amount of total losses decreases at the same time [26].…”

Section: Statistical Distribution Of Kpimentioning

confidence: 97%

“…In [26], a systematic study of a single prosumer with unbalanced generation and consumption connected to a realistically parametrized model of a four-wire DS has been performed for specific cases, while showing the numerical results of the registered energy by standard RM metrics and an RM metric based on power symmetrical components. Furthermore, it has been shown that additional losses can be assessed by measuring the negative and zero sequence power at the PoC of a prosumer with a good approximation.…”

Section: Introductionmentioning

confidence: 99%

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Revenue Metering of Unbalanced Prosumers in Energy Communities

Klusáček

Drápela

Langella

2023

IEEE Open J. Power Energy

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The presence of power generating plants owned by prosumers may lead to unbalanced bidirectional energy flows at the points of connection to the relevant distribution systems. This will impact future energy communities, where appropriate metering within the community is a crucial issue for billing purposes. This paper shows that the current metrics for active energy measurement and the registration of three-phase revenue meters may fail to fairly charge unbalanced prosumers for their use of the distribution system as an inherent phase-to-phase balancer. On the other hand, it is proven here that adopting metrics based on positive sequence power/energy measurement would lead to more fair billing within the community. A comparative study was performed using a simplified but realistic model of a distribution system feeding two prosumers (i.e., an archetype of an energy community). First, representative case studies were considered. Then, a more realistic simulation of a single day of operation was conducted. The main contribution of the paper is a detailed and systematic comparison of the methods used for measuring and sorting energy into registers in revenue meters to support the ongoing discussions about fair metering within future energy communities.

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Section: Introductionmentioning

confidence: 65%

Section: Statistical Distribution Of Kpimentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Revenue Metering of Unbalanced Prosumers in Energy Communities

Klusáček

Drápela

Langella

2023

IEEE Open J. Power Energy

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Arbitrarily fast delayed signal cancellation PLL for grid‐integration of renewable energy sources

Ahmed

Ushirobira

Efimov

2023

IET Renewable Power Gen

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Integrating renewable energy sources into an unbalanced distribution network requires fast and accurate extraction of fundamental frequency positive‐ and negative‐sequence components from the unbalanced three‐phase grid voltage signals. For this purpose, various methods are already available in the literature. Out of them, delayed signal cancellation (DSC) is prevalent. Conventional DSC can separate the sequence components using a quarter‐cycle delay. Fast DSC tools can achieve the same with less than a quarter‐cycle delay. However, neither conventional nor fast DSC can handle DC offset without requiring additional delayed signals. This article addresses this issue by proposing a modified DSC to estimate the sequence components with DC offset rejection and having arbitrarily fast convergence speed, that is, low memory requirement. Two equidistant delayed samples of the measured grid voltages/currents are required to implement the proposed technique and can easily be applied in a phase‐locked loop (PLL). Comparative experimental results demonstrate the suitability of the proposed approach over other DSC methods.

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Power Symmetrical Components as Grid Usage Indicator for Unbalanced Prosumers

Cited by 2 publications

References 8 publications

Revenue Metering of Unbalanced Prosumers in Energy Communities

Revenue Metering of Unbalanced Prosumers in Energy Communities

Arbitrarily fast delayed signal cancellation PLL for grid‐integration of renewable energy sources

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