Survey of supraharmonic emission of household appliances

Grevener, Anne; Meyer, Jan; Rönnberg, Sarah; Bollen, Math; Myrzik, J.M.A.

doi:10.1049/oap-cired.2017.0458

Cited by 51 publications

(25 citation statements)

References 1 publication

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“…Measurements made with a sinusoidal voltage and two distorted voltage waveforms were selected for the analysis. The distorted voltage waveforms correspond to a flat-top curve (THDv ~ 3%) and a pointed-top (also known as overswing in IEC 61000-4-13 [14]) curve (THDv ~4%), as shown in Fig. 1.…”

Section: Measurement Proceduresmentioning

confidence: 99%

“…To facilitate the analysis, different frequency bands have been considered 9-30 kHz, 30-95 kHz and 95-150 kHz. For them, some indices in the frequency domain proposed in [14] have been used. In this case, the maximum component (magnitude and frequency), the Total Supraharmonic Current (TSHC) and the Total Supraharmonic Distortion expressed as a percentage of the reference current (TSHD_Ir) were calculated for each frequency band.…”

Section: Measurement Proceduresmentioning

confidence: 99%

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Differences in the performance between CFL and LED lamps under different voltage distortions

Gil-de-Castro

Medina-Gracia

Rönnberg

et al. 2018

2018 18th International Conference on Harmonics and Quality of Power (ICHQP)

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Measurements have shown that the harmonic currents emitted by lamps with electronic ballast depend on the circuit topology and the existing supply voltage distortion. This paper quantifies the impact of supply voltage distortion on the harmonic and supraharmonic current emission of individual Light Emitting Diode (LED) lamps and compact fluorescent lamps (CFL). It also characterizes several Power Quality (PQ) parameters when those lamps are connected to pure sinusoidal waveform.

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Section: Measurement Proceduresmentioning

confidence: 99%

Section: Measurement Proceduresmentioning

confidence: 99%

Differences in the performance between CFL and LED lamps under different voltage distortions

Gil-de-Castro

Medina-Gracia

Rönnberg

et al. 2018

2018 18th International Conference on Harmonics and Quality of Power (ICHQP)

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“…Supraharmonics commonly originate from two sources: power-electronic converters and transmitters of power line communication [21], the former being the focus here. Magnitude, frequency and duration of the emission vary between different devices but come in three general types: constant in magnitude and/or frequency over one cycle of the power system frequency; varying in magnitude and/or frequency over one cycle of the power system frequency or having a transient character [94]. For household devices the emission is in most cases of the varying type, two examples can be seen in Figure 13, where the Short Time Fourier Transform of a fluorescent lamp and a heat pump is shown.…”

Section: Supraharmonicsmentioning

confidence: 99%

“…Many modern household devices emit supraharmonics to some extent. In [94] it is concluded that more than half of the household devices on the market have identifiable supraharmonic emission. There is a large diversity in magnitude and frequency between different devices, even if they are of the same type.…”

Section: Supraharmonicsmentioning

confidence: 99%

Hosting Capacity of the Power Grid for Renewable Electricity Production and New Large Consumption Equipment

2017

Self Cite

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After a brief historical introduction to the hosting-capacity approach, the hosting capacity is presented in this paper as a tool for distribution-system planning under uncertainty. This tool is illustrated by evaluating the readiness of two low-voltage networks for increasing amounts of customers with PV panels or with EV chargers. Both undervoltage and overvoltage are considered in the studies presented here. Probability distribution functions are calculated for the worst-case overvoltage and undervoltage as a function of the number of customers with PV or EV chargers. These distributions are used to obtain 90th percentile values that act as a performance index. This index is compared with an overvoltage or undervoltage limit to get the hosting capacity. General aspects of the hosting-capacity calculations (performance indices, limits, and calculation methods) are discussed for a number of other phenomena: overcurrent; fast voltage magnitude variations; voltage unbalance; harmonics and supraharmonics. The need for gathering data and further development of models for existing demand is emphasised in the discussion and conclusions.An international working group [22] recently presented a number of recommendations, key findings and open issues to be addressed because of the integration of solar power. Recommendations were given for a number of power-quality phenomena, including harmonics, supraharmonics, fast voltage variations (faster than 10-min time scale), slow voltage variations (slower than 10 min), overvoltage, flicker, and voltage unbalance. The hosting capacity approach, as was proposed by an international cooperation project in 2004 (see Section 2) is put forward in the report as an important tool for quantifying the impact of solar power on the power system. Additional work is needed, according to the report, for establishing suitable performance indices and corresponding limits.This paper consists of three main parts. It starts in Section 2 with an overview, partly from a historical insider perspective, of the hosting-capacity approach. This part also includes a discussion on different kinds of uncertainly. A hosting-capacity-based planning approach is presented in Section 3, applied in Section 4.1 through Section 4.6 and discussed in Section 4.7. The description and the application are for overvoltage and undervoltage as these are the phenomena, with the possible exception of overcurrent, for which the best calculation tools, performance indices and limits are available. The third part of the paper contains a detailed discussion about including other phenomena in hosting-capacity studies. For each phenomenon, performance indices, limits and calculation methods are discussed. Hosting CapacityThe term "hosting capacity" was coined in the context of distributed generation by André Even in March 2004 during discussions within the integrated European EU-DEEP project [23,24]. An approach for quantifying the hosting capacity was developed further by others within that same project [25]. The term "hosting capa...

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“…The time varying behavior of the distortion is observed by introducing smoothing/averaging actions over proper time intervals (3s, 10min and 2hours), constituted by contiguous time windows of about 200 ms length each. Consequentely, intra 200ms and/or intra-cycle time varying phenomena (e.g [3], [5], [6], [10]) are observed only in terms of their averaged effects [11].…”

Section: Introductionmentioning

confidence: 99%

Proposal of a Desynchronized Processing Technique for Assessing High-Frequency Distortion in Power Systems

Collin

Djokić

Drápela

et al. 2019

IEEE Trans. Instrum. Meas.

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Assessing high frequency (HF) distortion in power systems is a new challenge in the framework of in-situ power quality monitoring. The IEC suggests the use of a high-pass filter in the measurement chain, which can be analog (with a dedicated channel for HF assessment) or integrated in its digital form into the signal processing stage, in order to reduce the measurement uncertainty. This paper proposes a desynchronized processing technique (DPT) as an effective alternative to the other digital filtering techniques presented in literature, which also allows for a potential simplification of the measurement hardware. The DPT performance is analyzed by means of numerical experiments and laboratory measurements performed using two different test beds and both 16 and 24 bit analog to digital converters (ADCs). The test beds are used to evaluate the combined contribution of the ADC and the signal processing stage to the whole measurement chain uncertainty and identify achievable accuracy levels for different frequency ranges and magnitudes of HF distortion. The results highlight the strengths of the DPT compared to other techniques and demonstrates its potential to include HF in a comprehensive waveform distortion assessment in power systems.

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Survey of supraharmonic emission of household appliances

Cited by 51 publications

References 1 publication

Differences in the performance between CFL and LED lamps under different voltage distortions

Differences in the performance between CFL and LED lamps under different voltage distortions

Hosting Capacity of the Power Grid for Renewable Electricity Production and New Large Consumption Equipment

Proposal of a Desynchronized Processing Technique for Assessing High-Frequency Distortion in Power Systems

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