Harmonic incursion at the point of common coupling due to small grid-connected power stations

Mumtaz, Majid; Khan, Saima; Chaudhry, Waqas A.; Khan, Zafar A.

doi:10.1016/j.jesit.2015.06.005

Cited by 6 publications

(3 citation statements)

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“…In [4]- [7], the FACTS have been used to alleviate congestion on transmission lines. In [8], the harmonic characteristics of a Static Var Compensator (SVC) are examined in small gridconnected power stations. In [9], the performance of SVC is shown as a mechanism to improve the voltage profile, power factor, and power loss in distribution substations.…”

Section: B Literature Reviewmentioning

confidence: 99%

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Simulation of the influence of STATCOM on power system losses

Sosapanta Salas,

Macías Gómez

2023

Sci. tech

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The supply of growing electricity demand is possible through continuous technological advances and the expansion of national and international electrical systems. This scenario could introduce voltage drops and consequent changes in the reactive power flow throughout the electrical network. In order to control these problems, various strategies have been developed as a solution to improve the transport and distribution of electrical energy. One of them is the Flexible Alternating Current Transmission System (FACTS), and more specifically the STATic synchronous COMpensator (STATCOM). This paper investigates the influence and effectiveness of STATCOM to mitigate the losses in the transmission lines and its impacts on bus voltage drops. The simulations are performed using the software DIgSILENT PowerFactory and the results showed that STATCOM reduces the power system losses in an interval of 23.86% until 32.86%, and in addition, the STATCOM decreases the annual energy cost by 7.82% in the implemented test case.

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Section: B Literature Reviewmentioning

confidence: 99%

“…These power losses are computed as average power losses in loadability scenarios. The annual costs are calculated as (8).…”

Section: A Complementary Analysismentioning

confidence: 99%

Simulation of the influence of STATCOM on power system losses

Sosapanta Salas,

Macías Gómez

2023

Sci. tech

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“…For example, PQ recordings and case studies from Europe have shown that renewable energy resources are a dominant source of supraharmonics in the MV grid [10]- [12]. The power electronic inverters that are used to interface such generating resources to the grid inject harmonics and supraharmonics into the MV grid while injecting active and reactive power into the grid [13]. This injection of harmonics and supraharmonics depends upon the grid impedance at the Point of Common Coupling (PCC), transfer impedances in the grid and its resonance characteristics and has been extensively discussed in [14] through the use of a case study from Sweden.…”

Section: Introductionmentioning

confidence: 99%

Telephone Interference From Solar PV Switching

Singh

Cooke

Johns

et al. 2023

IEEE Open J. Power Energy

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The emergence of solar Photovoltaic (PV) generation has been one of the biggest changes in the Power Grid in the past decade. Such generation plants are generally inverter based and these devices are known sources of harmonics of the fundamental frequency and 'supraharmonics' (distortion in the frequency range 2 to 150 kHz). It has long been theorized that due to factors such as the frequency response of service transformers that interface solar PV plants to the grid, impedance of the power system at the point of common coupling and the impedance of devices connected near solar inverters, supraharmonics frequencies are localized and generally do not couple to the grid. Exceptions to this general hypothesis have been reported in Europe, where supraharmonics from PV and wind power plants have been shown to couple to the local three-phase three wire Medium Voltage (MV) system. This paper shows that in threephase four wire multi-point grounded MV systems, such as the ones used in the United States (U.S.), application of conventional grounding schemes to PV plants can lead to the unintended consequence of coupling of supraharmonics to the grid through the neutral conductor and ground circuit. It describes a case study in which supraharmonics due to inverter switching led to telephone interference for customers located around a solar PV plant. To determine the mechanism by which the supraharmonics frequencies were coupling to the grid, an investigation of the emission from the plant was performed using conducted as well as radiated measurements. The novel setup used for performing these radiated measurements, the unique underlying mechanism by which inverter switching frequencies coupled to the grid and the lessons learned in this process regarding solar PV grounding and installation practices are described in this paper.

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