Considerations on hosting capacity for harmonic distortions on transmission and distribution systems

Santos, Iago; Ćuk, V.; Almeida, Pedro M. de; Bollen, M.H.J.; Ribeiro, Paulo F.

doi:10.1016/j.epsr.2014.09.020

Cited by 61 publications

(28 citation statements)

References 12 publications

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“…[1][2][3][4][5][6][7] Utility harmonic impedance is a key factor to assess harmonic emission levels in power systems, since it can be used to successfully distinguish the utility-side and customer-side harmonic contributions. [8][9][10][11][12][13][14] Calculation methods of utility harmonic impedance can be divided into categories, ie, invasive 15 and noninvasive methods. [16][17][18][19][20][21][22][23] With invasive methods, utility harmonic impedance is extracted from the variations of voltage and current caused by the injected harmonic current.…”

Section: Discussionmentioning

confidence: 99%

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Harmonic current emission level assessment of residential loads based on impedance-gathering trend

Tang

Lin

et al. 2017

Int. Trans. Electr. Energ. Syst.

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Summary Because of the widespread application of new energy and power electronic–based residential loads in distribution networks, the impact of collective harmonics cannot be ignored. The harmonic impedance should be evaluated when determining the harmonic responsibilities at the point of common coupling. This paper presents a new noninvasive method to quantify the harmonic current responsibilities of the utility side and customer side on the basis of impedance‐gathering trend. The method is compared with another noninvasive resistance‐sign–based method. In addition, the emission level of the residential loads is calculated. The presented results of a field test conducted in a typical residential apartment in Shanghai, China, prove that the method works well in practical conditions.

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Section: Discussionmentioning

confidence: 99%

“…Utility harmonic impedance is a key factor to assess harmonic emission levels in power systems, since it can be used to successfully distinguish the utility‐side and customer‐side harmonic contributions . Calculation methods of utility harmonic impedance can be divided into categories, ie, invasive and noninvasive methods .…”

Section: Introductionmentioning

confidence: 99%

Harmonic current emission level assessment of residential loads based on impedance-gathering trend

Tang

Lin

et al. 2017

Int. Trans. Electr. Energ. Syst.

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“…The basic approach used in the literature is the source impedance or the transfer impedance matrix [66][67][68][69][70]; for harmonic frequencies instead of for the negative-sequence voltage as in the case of unbalance [39] or the equivalent impedances for single-phase loads as in the case of overvoltage due to single-phase PV. Once the injected harmonic currents and the impedance values are known, the harmonic voltage distortion can be calculated as a function of the amount of new production or consumption.…”

Section: Calculation Methodsmentioning

confidence: 99%

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

2017

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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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“…is gap has been recognized and addressed in the open literature, although not in a holistic way. For instance, reference [8] deals with the power transfer capability problem of DGUs including harmonic distortion, and considering power quality regulations at a speci c point of the network. Reference [9] brings out some pitfalls of electric power quality indexes allowed by international regulations showing that being within the limits is not enough in order to ensure proper performance of the DGUs electrically close to each other.…”

Section: Imentioning

confidence: 99%

A Comprehensive Design Approach of Power Electronic-Based Distributed Generation Units Focused on Power-Quality Improvement

Esparza

Segundo

Nunez

et al. 2017

IEEE Trans. Power Delivery

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e undesirable harmonic distortion produced by distributed generation units (DGUs) based on power electronic inverters presents operating and power quality challenges in electric systems. e level of distortion depends on the internal elements of the DGUs as well as on the characteristics of the grid, loads, controls, among others. is paper presents a comprehensive method, focused on power quality indexes and e ciency for the design of micro-grids with multiple DGUs interconnected to the AC grid through three phase multi-Megawatt medium-voltage PWM voltage source inverters (PWM-VSI). e proposed design method is based on a least square solution using the harmonic domain modeling approach to e ectively consider explicitly the harmonic characteristics of the DGUs and their direct and cross-coupling interaction with the grid, loads and the other DGUs. Extensive simulations and analyses against PSCAD are presented in order to show the outstanding performance of the proposed design approach.

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Considerations on hosting capacity for harmonic distortions on transmission and distribution systems

Cited by 61 publications

References 12 publications

Harmonic current emission level assessment of residential loads based on impedance-gathering trend

Harmonic current emission level assessment of residential loads based on impedance-gathering trend

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

A Comprehensive Design Approach of Power Electronic-Based Distributed Generation Units Focused on Power-Quality Improvement

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