Design of an Almost Harmonic-free TCR

Obais, Abdulkareem Mokif; Pasupuleti, Jagadeesh

doi:10.19026/rjaset.7.266

Cited by 5 publications

(5 citation statements)

References 13 publications

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“…where, V is the rms magnitude of each phase voltage. The line currents of the unbalanced three-phase load can be given by ( 4), ( 5), dan (6).…”

Section: 𝑉 𝐴 = 𝑉mentioning

confidence: 99%

“…A DSTATCOM in [5] was capable of real-time compensation for unbalanced loads in 4-wire distribution systems. The method of symmetrical components was exploited for devising the controlling scheme for this In [6] a new configuration of harmonic suppression circuitries was proposed to a TCR, which promoted it to respond linearly to reactive current demand without harmonic association.…”

Section: Introductionmentioning

confidence: 99%

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Energy saving through load balancing of 3-wire loads

Obais

Mukheef

2023

IJECE

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<span lang="EN-US">In this paper, static var compensators (SVCs) and many load compensation techniques are reviewed. A continuously and linearly controlled compensating susceptance is devised from a switched capacitor bank and a switched reactor bank. The switched capacitor bank is built of four binary weighted thyristor switched capacitors, while the switched reactor bank is built of three binary weighted thyristor switched reactors. Although few switched capacitors and reactor are used, their binary weighted values beside their control scheme make them respond as a continuously and linearly controlled reactive device in capacitive and inductive modes of operation. A load balancing system is constructed of three identical devised compensating susceptances connected in delta-form. It is designed for balancing an 11 kV 50 Hz distribution station. The proposed system is designed and tested on PSpice which is a computer program equivalent in performance to real hardware design. The simulation results of the proposed system have showed significant treatment of severe imbalance conditions.</span>

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“…where, V is the rms magnitude of each phase voltage. The line currents of the unbalanced three-phase load can be given by ( 4), ( 5), dan (6).…”

Section: 𝑉 𝐴 = 𝑉mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy saving through load balancing of 3-wire loads

Obais

Mukheef

2023

IJECE

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“…Figure 3a shows a TCR supplied directly from an AC voltage vAC and fired at an angle α as shown in Figure 3b. According to this firing angle, the TCR fundamental current component I1 can be given by [6][7][8][9]:…”

Section: Figure 2 the Power Circuit Of The Proposed Susceptancementioning

confidence: 99%

“…A harmonic-free TCR configuration was proposed [7] for energy conservation. In this SVC, the TCR was designed to provide continuous and linearly controlled behavior as a purely inductive device.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Linear Susceptance Model Deploying a Thyristor Controlled Reactor with Harmonic Suppression Circuitry and Advanced Current Controller

Obais

2023

MMEP

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The Thyristor Controlled Reactor (TCR), an operative reactive power device, is controlled non-linearly in its inductive operational mode, resulting in injection of odd current harmonics. This introduces challenges regarding power quality, which necessitates conditioning of the device. In this study, the development of a continuously and linearly controlled compensating susceptance, constructed from a TCR equipped with harmonic suppression and absorption features, is presented. The series suppression circuitry incorporated within the design consists of a series RLC circuit, resonating at the frequency of the AC source. Simultaneously, the shunt absorption circuitry is specifically designed to eliminate the third and fifth harmonic current components produced by the TCR. This innovative arrangement substantially minimizes the odd harmonics generated by the TCR. In addition, an advanced current controller has been introduced, allowing the reactive current of the proposed susceptance to be linearly controlled in both inductive and capacitive modes. The proposed susceptance was designed and simulated on PSpice, utilizing a 50Hz, 220V AC source. Simulation results demonstrate that the susceptance current reaches its steady-state value within approximately 100ms. Furthermore, the susceptance current in the steady-state region is almost completely devoid of harmonics. Notably, the proposed susceptance displays remarkable linearity during its response to reactive current demands across both inductive and capacitive operational modes. This research provides a significant step forward in addressing the challenges associated with TCR power quality.

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“…Using phase shift SPWM, two control loops (phase angle and DC voltage) were exploited to certify the balance of the DC voltages and to calculate parameters of the PI controller. A harmonic free TCR was introduced in [12] as a compensating susceptance controlled linearly and continuously in inductive operational mode, whereas in [13] a TCR equipped with a new current controller and an adaptive filtering scheme was introduced to function as a continuously and linearly controlled capacitive susceptance. Both categories were dedicated for power quality purposes like power factor correction and load balancing.…”

Section: Introductionmentioning

confidence: 99%

Design of a linearized 4-H-bridge STATCOM for load balancing purposes

Obais,

Mukheef

2023

IJPEDS

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<span lang="EN-US">In this paper, a 4-H-bridge STATCOM (4-HB STATCOM) is introduced. Four H-bridges are cascaded to build the proposed STATCOM. Cascading the H-bridges makes it possible to operate the devised STATCOM on high voltage levels with less voltage harmonic association. The proposed STATCOM is equipped with an adaptive current controller and a voltage balancing technique for its DC capacitor voltages. The adopted controlling strategy makes the STATCOM respond continuously and linearly to current demand in both inductive and capacitive operational modes without noticeable association of harmonics. The DC capacitor of each H-bridge is shunted by a second harmonic filter to stabilize its voltage. The proposed STATCOM does not require initial charging of its DC capacitors because it is provided with a utilized technique for charging them rapidly by disabling the STATCOM carrier for a certain period sufficient to build up the required level of DC voltages. In this work, the proposed STATCOM is designed to operate on 11 kV AC voltage as a continuously and linearly controlled compensating susceptance. It can deservingly be employed in load balancing systems for achieving big amount of energy savings in power generation and big reduction in transmission losses.</span>

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Design of an Almost Harmonic-free TCR

Cited by 5 publications

References 13 publications

Energy saving through load balancing of 3-wire loads

Energy saving through load balancing of 3-wire loads

An Innovative Linear Susceptance Model Deploying a Thyristor Controlled Reactor with Harmonic Suppression Circuitry and Advanced Current Controller

Design of a linearized 4-H-bridge STATCOM for load balancing purposes

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