Besides, the performance results of harmonic compensation are satisfactory. Theoretical analyses and simulation results are obtained from an actual industrial network model in PSCAD. The simulation results are presented for proposed system in order to demonstrate that the harmonic compensation performance meets the IEEE-519 standard.
This paper presents an improvement in harmonic compensation performance of a previously proposed smart charger (SC) with a constant dc-capacitor voltage-control (CDCVC) strategy for electric
A single-phase multilevel inverter with a switched-capacitor multilevel (SC-MLI) configuration is developed to provide 13-level output voltages. An improved genetic algorithm (GA) with adaptive mutation and crossover rates is employed to achieve robust harmonic mitigation by avoiding local optima and ensuring optimal performance. The topology
Four solutions were compared, considering concentrated and distributed compensation with capacitor banks and harmonic filters. Although the cost of investment in concentrated compensation is lower than that of distributed compensation, a higher reduction in electrical losses and a lower payback period are obtained with distributed compensation
Capacitor or frequency scanning is usually the first step in harmonic analysis for studying the impact of capacitors on system response at fundamental and harmonic frequencies. Problems with harmonics often show up at capacitor banks first, resulting in fuse blowing
The purpose of this paper is to present a method of reducing voltage total harmonic distortion (THD) at buses with capacitor compensation where it is desired to maintain a given displacement factor. A series reactor, XL, will be selected that will minimize expected THD for a specified range of source impedance values, while constraining the
Harmonic analysis evaluates the impact of harmonic distortion on the performance and operation of the reactive power compensation system and the broader electrical network. High levels of harmonic distortion can lead to voltage distortion, increased losses, overheating of equipment, resonance problems, and interference with sensitive electronic devices.
Abstract: This paper presents a hybrid compensation system with shunt active power filter(SAPF) and power capacitors. Firstly, two different load current detection points are introduced. With traditional method, hybrid compensation system is stable when capacitor current is not included in the detected load current. But, when capacitor current
Fig. 1a shows a typical three-phase distribution system, in which a group of inductive linear load, non-linear load and shunt power capacitor are connected simultaneously. Shunt power capacitor C P is used to compensate for the main inductive current generated by the linear load, while D-CAP to compensate for the rest inductive current. Non-linear load shown
In this paper, a combined control for SAPF is proposed to compensate harmonic currents from non-linear load and damp parallel resonance between line impedance and power capacitor simultaneously. Physical principle of harmonic compensation and resonance damping is discussed in Section 2 by means of equivalent circuit.
Unlike PFC circuits, the APF is a system in itself which provides compensation of harmonics and reactive power in order to reduce undesirable effects from non-linear loads and uncontrolled
This paper proposes a dynamic capacitor (D-CAP) based on the family of inverter-less active filters that is able to provide a dynamically controllable capacitance with active harmonic
The filter absorbs the harmonic and prevents resonance starting with the compensation capacitor. Depending on the position of the filter in the installation it allows the circulation of the "captured" harmonic to be decreased. the filter must be sized so as to absorb currents that may be high where resonance occurs. Go back to contents ↑
The installation''s total harmonic distortion level and the compensation rate are two essential factors in choosing capacitor type. The more distorting loads incorporated in the installation and/or the more significant the compensation compared with the power supply, the higher the risk of harmonic overload of the capacitors.
transformer and line, PFC capacitors, and the PV systems. Section III System Modelling Specifically, Section IV discusses the IV. Distribution System Harmonic Compensation Using DG. Sections V discuss the Harmonic Compensation with the Presence of PFC Capacitors. Section VI discuss the simulation results Finally, this work is
Abstract: This paper presents a hybrid compensation system with shunt active power filter(SAPF) and power capacitors. Firstly, two different load current detection points are introduced. With
With remarkable progress in the speed and capacity of semiconductors switching devices such as GTO thyristors and IGBT''s, active filters consisting of voltage- or current-source PWM
Although the harmonic compensation effect of SAPF is continuously improved, its dynamic interaction with the source impedance and non-linear loads is usually neglected, which may lead to a series of stability
Capacitor or frequency scanning is usually the first step in harmonic analysis for studying the impact of capacitors on system response at fundamental and harmonic frequencies. Problems with harmonics often show up at capacitor banks first, resulting in fuse blowing and/or capacitor failure.
The circuit diagram of compensation capacitors and peripheral hardware in the implemented hybrid reactive power compensation system is also given in Fig. 7. As can be seen in this figure, there are six single-phase and two three-phase capacitors. Rated powers of each capacitor are also shown in the same figure. In the hybrid system, as a controller, a program
Unlike PFC circuits, the APF is a system in itself which provides compensation of harmonics and reactive power in order to reduce undesirable effects from non-linear loads and uncontrolled passive loads in power systems. The grid interconnection of renewable energy source is a popular issue in the electric utilities.
The purpose of this paper is to present a method of reducing voltage total harmonic distortion (THD) at buses with capacitor compensation where it is desired to
The installation''s total harmonic distortion level and the compensation rate are two essential factors in choosing capacitor type. The more distorting loads incorporated in the
Capacitors are needed in the different parts of the network as part of reactive power compensation and harmonic filtering systems. Mentioned below are the major application areas. Electrical power consumption − Chemical, Oil and Gas industry (e.g. processing plants, offshore platforms, FPSOs) − Steel industry (e.g. arc furnaces, rolling-mills)
With remarkable progress in the speed and capacity of semiconductors switching devices such as GTO thyristors and IGBT''s, active filters consisting of voltage- or current-source PWM inverters have been studied and put into practical use [1]-[6] because they have the ability to overcome the above- mentioned disadvantages inherent in passive filters.
A single-phase multilevel inverter with a switched-capacitor multilevel (SC-MLI) configuration is developed to provide 13-level output voltages. An improved genetic algorithm
Four solutions were compared, considering concentrated and distributed compensation with capacitor banks and harmonic filters. Although the cost of investment in
This paper proposes a dynamic capacitor (D-CAP) based on the family of inverter-less active filters that is able to provide a dynamically controllable capacitance with active harmonic filtering integrated into the same unit. This new device is seen to be compact, and is likely to be cost competitive against simple switched shunt capacitors. It
In this paper, a combined control for SAPF is proposed to compensate harmonic currents from non-linear load and damp parallel resonance between line impedance and power capacitor simultaneously. Physical
Compensation of Power Quality using Solar-Powered Distributed Generation Interfaced by Fuzzy Logic Controlled Inverter to the Main Grid Three phase nonlinear loads produce sequenced positive (7th
The presence of harmonics is a source of deterioration of the power factor. It generates unnecessary power consumption not compensated by the capacitor banks. The harmonics generate capacitor overloads and the capacitors must therefore be reinforced or protected using special layouts.
The harmonics circulate preferentially in the capacitors at the risk or overloading and destroying them. The impedance of a capacitor is inversely proportional to the frequency (Zc = 1/cω). The more the frequency increases (the case with harmonics), the more the impedance decreases.
Interaction of Harmonics with Capacitors 213 the feeder. This may allow the circuit to carry addi- tional loads and save costs for upgrading the network when extra capacity is required. In addi- tion, the lower current flow reduces resistive losses in the circuit. • Improved Voltage Profile.
In the presence of harmonics, the total power factor is defined as total power factor = TPF = cos0 = Ptotal Stotal (5-6) where Ptotal and Stota1 are defined in Eq. 5-4. Since capacitors only provide reactive power at the funda- mental frequency, they cannot correct the power factor in the presence of harmonics.
Capacitor Bank Behaves as a Harmonic Source. There are many capacitor banks installed in indus- trial and overhead distribution systems. Each capaci- tor bank is a source of harmonic currents of order h, which is determined by the system short-circuit impedance (at the capacitor location) and the capac- itor size.
However, considering the technical criterion that in an electrical system with harmonics, the useful life of the capacitor banks is significantly reduced due to the overheating produced by current harmonics, it is suggested not to select the solution with a distributed capacitor bank (S2) but with distributed harmonic filters (S4).
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