PQ and Harmonic Assessment Issues on Low-Cost Smart Metering Platforms: A Case Study

Artale, Giovanni; Caravello, Giuseppe; Cataliotti, Antonio; Cosentino, Valentina; Cara, Dario Di; Dipaola, Nunzio; Guaiana, Salvatore; Panzavecchia, Nicola; Sambataro, Marilena G.; Tinè, Giovanni

doi:10.3390/s20216361

Cited by 22 publications

(10 citation statements)

References 42 publications

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“…This means that the minimum sampling frequency must be greater than 181.25 kHz, 243.75 kHz and 975 kHz, respectively. To keep the computational cost low and to reduce the calculation time, the complex fast Fourier transform (CFFT) algorithm is applied to the acquired samples [31]. The use of this algorithm allows the calculation of real and imaginary part of each spectrum component.…”

Section: Measurement Methodologymentioning

confidence: 99%

“…In this way, it is possible to determine both amplitude and phase of each spectral component. The FFT computation within impedance calculation time was experimentally measured by the procedure adopted in [31]: the overall time needed is 9.4 ms. This result shows that the time variance of the impedance value can be recorded approximately in half a period of the mains voltage.…”

Section: Measurement Methodologymentioning

confidence: 99%

See 1 more Smart Citation

A Line Impedance Calculator Based on a G3 PLC Modem Platform

Artale

Caravello

Cataliotti

et al. 2022

IEEE Trans. Instrum. Meas.

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Power line communication is one of the most today used technologies, for both automatic meter reading and many other smart grid applications. In this framework, a characterization of electrical network in PLC frequency range is needed in terms of impedance measurement and received signal level. This can allow choosing the most suitable and less noisy frequency ranges for PLC transmission. Usually, these characterization measurements are performed with dedicated instrumentation and in the absence of mains voltage. This paper wants to propose an alternative solution, which allows these kinds of measurement to be performed using electronic boards currently used as on-field applications such as smart meters. To this aim, an innovative measurement tool is proposed, which does not need a specific characterization signal to be injected, because it uses the preamble of a generic PLC transmission. Moreover, the impedance calculation is performed using a FFT analysis, which does not require high computational capabilities. These features allowed the proposed tool to be implemented using a G3-PLC transceiver, embedded in many commercial smart meters, and low-cost additional hardware. The paper shows how the proposed system correctly measures the PLC impedance on CENELEC A, B and FCC frequency ranges.

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Section: Measurement Methodologymentioning

confidence: 99%

Section: Measurement Methodologymentioning

confidence: 99%

A Line Impedance Calculator Based on a G3 PLC Modem Platform

Artale

Caravello

Cataliotti

et al. 2022

IEEE Trans. Instrum. Meas.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, the errors produced by sensors, affect the accuracy of the perturbation identification and significantly limit the power quality improvement in electric networks [ 22 , 23 , 24 ]. It is worth noting that this issue has not been fully addressed in the literature [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Sensor Effects in LCL-Type Grid-Connected Shunt Active Filters Control Using Higher-Order Sliding Mode Control Techniques

Alali

Shtessel

Barbot

et al. 2022

Sensors

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The effects of measuring devices/sensors on improving the power quality (PQ) of electric networks are studied in this paper. In this context, improving the performance of an LCL-type grid connected to a three-phase three-wire shunt active filter (SAF) in the presence of voltage perturbations is studied. In order to ensure the high-quality performance of LCL-SAF in the presence of voltage perturbations, the robust continuous second-order sliding mode controller (2-SMC), including twisting and super-twisting controllers, and continuous higher-order sliding mode controller (C-HOSMC)-based approaches are employed. These controllers, whose outputs are processed by pulse-width modulation (PWM), allow minimization of the phase shift and prevent the generation of discontinuous chattering commands, which can severely damage the VSI components. Moreover, an integration of a generalized instantaneous power identification algorithm with an advanced phase locked loop (PLL) was proposed and experimentally tested to validate the effective performances of SAF under severe perturbations. Additionally, the studied approaches were tested via simulations taking into account a conventional nonlinear industrial load in a real textile factory environment, using measurements provided by power quality analyzers. Finally, the effects of the measuring devices, including the current and voltage sensors, on the accuracy and reliability of the SAF and, consequently, on the PQ of the electric power grid were studied via simulations and experimentally. The results of this study support the validity of the recently published patent.

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“…All these undesirable effects cause huge economic losses [ 3 ] and require an effective power quality analysis in the grid and affected facilities. Smart sensors proposals are rapidly increasing in response to these new requirements [ 4 , 5 , 6 , 7 , 8 , 9 ]. Although the first applications were almost exclusively limited to billing, they now include new features related to power quality detection and have a common denominator: they require high processing speed to handle large computer data in a shorter time.…”

Section: Introductionmentioning

confidence: 99%

Instantaneous Disturbance Index for Power Distribution Networks

Borrás-Talavera

Bravo

Álvarez-Arroyo

2021

Sensors

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The stability of power systems is very sensitive to voltage or current variations caused by the discontinuous supply of renewable power feeders. Moreover, the impact of these anomalies varies depending on the sensitivity/resilience of customer and transmission system equipment to those deviations. From any of these points of view, an instantaneous characterization of power quality (PQ) aspects becomes an important task. For this purpose, a wavelet-based power quality indices (PQIs) are introduced in this paper. An instantaneous disturbance index (ITD(t)) and a Global Disturbance Ratio index (GDR) are defined to integrally reflect the PQ level in Power Distribution Networks (PDN) under steady-state and/or transient conditions. With only these two indices it is possible to quantify the effects of non-stationary disturbances with high resolution and precision. These PQIs offer an advantage over other similar because of the suitable choice of mother wavelet function that permits to minimize leakage errors between wavelet levels. The wavelet-based algorithms which give rise to these PQIs can be implemented in smart sensors and used for monitoring purposes in PDN. The applicability of the proposed indices is validated by using a real-time experimental platform. In this emulated power system, signals are generated and real-time data are analyzed by a specifically designed software. The effectiveness of this method of detection and identification of disturbances has been proven by comparing the proposed PQIs with classical indices. The results confirm that the proposed method efficiently extracts the characteristics of each component from the multi-event test signals and thus clearly indicates the combined effect of these events through an accurate estimation of the PQIs.

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PQ and Harmonic Assessment Issues on Low-Cost Smart Metering Platforms: A Case Study

Cited by 22 publications

References 42 publications

A Line Impedance Calculator Based on a G3 PLC Modem Platform

A Line Impedance Calculator Based on a G3 PLC Modem Platform

Sensor Effects in LCL-Type Grid-Connected Shunt Active Filters Control Using Higher-Order Sliding Mode Control Techniques

Instantaneous Disturbance Index for Power Distribution Networks

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