The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a seven level inverter utilizing switched-capacitor technique. Proposed topology employs two asymmetric DC voltage sources as input and generates a multilevel staircase output. The structure includes a front-end switched-capacitor based DC-DC converter cascaded by a back-end H-bridge inverter. The frontend SC DC-DC converter feeds three DC voltage levels to the H-bridge inverter...
In this paper, a three-degree-of-freedom robot model is established to solve the problem of unstable structure of the manipulator. Using the finite element method, topology optimization, the key component of the robot, the rear arm. This paper carries out static analysis, lightweight design, to verify its stiffness and strength. For the improved arm structure, the structure is more stable, reasonable...
Inverter is an integral part of any renewable energy conversion system. For a multilevel inverter, attempt is to obtain an output voltage which is near sinusoidal in shape. The switching angles and the voltage levels are decided in such a way so as to maximize the fundamental component with minimum THD. In this paper, it is shown how a simple method like Grey Analysis method can be used to decide...
In this paper, impulsive containment control problem for networked harmonic oscillators is investigated with multiple leaders under directed network topology. Based on the graphic theory, matrix analysis theory and impulsive differential equation stable theory, a distributed impulsive containment control law is proposed, and the sufficient conditions which guarantee the convergence of the proposed...
Various topologies of multilevel inverters have been proposed as a potential replacement for cascaded multilevel inverters in high-voltage, high-power applications as they can be extended to any number of voltage levels without introducing much more complexity to the control system. This paper discussed in detail about the application of selective harmonic elimination pulse-width modulation (SHE-PWM)...
The modular multi-level converter (MMC) is considered as the state of the art converter among multilevel topologies. The harmonic suppression of circulating current is the inherent problem needed to be solved. In this paper, a new control strategy is proposed. The strategy includes the double fundamental frequency, negative sequence rotating coordinate transformation and the four fundamental frequency,...
This paper investigates the distributed fixed-time consensus tracking problem for multiple coupled harmonic oscillators under the directed topology. By adopting fast terminal sliding-mode strategies, the new distributed consensus protocols are proposed for each harmonic oscillator agent. This achieves fixed-time consensus tracking, in which the bound of settling time are independent of initial conditions...
The grid-voltage unbalance can result in a double-frequency component in the output power of a three-phase grid-connected converter, which significantly degrades the system performance. To address this issue, the power decoupling concept, which was previously developed for the single-phase system to handle the double-frequency power oscillation, is applied to the three-phase system in this paper....
This paper presents a comprehensive harmonic analysis of the interleaved voltage source converters based on different carrier configurations. The impact of carrier configurations on the interleaved three-level (3L) converters is also investigated. The relationship among the harmonics in line-to-line voltage, common mode voltage (CMV), and circulating current is identified for interleaved two-level...
The number of electronic loads in ac distribution systems is rapidly increasing, and some of such nonlinear loads are injecting harmonics and reducing the power quality. At the same time, there are electronic loads that are equipped with high-bandwidth converters and power factor correction (PFC), which inject sinusoidal currents at line frequency back into the grid. Moreover, modern smart meters...
Single-phase power converters are commonly employed to integrate renewable sources, such as solar PV or fuel cells, among other applications. However, they typically require large and limited lifetime electrolytic capacitors to filter large DC side ripple components, representing a limit for the power density and durability of converters, potentially making the technology unpractical for some applications...
This paper studies the segmented thyristor controlled reactors ST CR used to control the inductive reactive power with zero harmonic content in the developed current. This paper explains how to use STCR to produce inductive reactive power with discrete steps of operation from zero to full reactive power rating of the inductor. Paper studies several topologies used as STCR and illustrates the specifications...
An internal paralleled active neutral point clamped converter (IP-ANPC) is presented in this paper. Advantages of the IP-ANPC converter include modularity, reliability and efficiency improvement, capability of interleaving, and better utilization of wide band-gap (WBG) devices. To simplify the operation of the IP-ANPC converter and provide an easy interleaving solution, a logic-based flying capacitor...
This paper proposes a new induction motor drive scheme to generate a dense multilevel dodecagonal space vector structure, by stacking two 3-level flying capacitors and cascading two H-bridges. The proposed scheme combines the benefits of both multilevel as well as dodecagonal voltage space vector structure. All the capacitors in the stacked inverters are balanced using switching state redundancies...
This work proposes the sub-module integration of flyback converters with an unique unfolding H-bridge inverter, for photovoltaic (PV) microinverter application. An dedicated control strategy is also proposed. This sub-module integration proposed to remove the existing junction box of the PV module and replace the three by-pass diodes with three individual DC-DC converters connected to a single-phase...
As the amount of decentralized generation is continuously increasing the controlling and maintaining of grid stability becomes more complex. This is caused by a change of production capacities from the high voltage area into the distribution network. In order to ensure stability of future smart grids a new 3-Level 4-Leg inverter as a part of a power electronic regulator is introduced. This topology...
This paper presents an integration of a battery support to a single phase grid with a solar PV system. The unique control of multi-functional voltage source converter achieves controlled charging and discharging of the battery. The implemented converter achieves the extraction of maximum power from varying solar PV array further maintaining the battery current control within acceptable limits. The...
This paper provides optimal design of new topologies of the thyristor controlled reactors TCR used in static VAR compensators systems SVC with zero harmonic content. The paper discusses the principle of operation of the new topologies which depends on thyristor switched reactors TSR. The objective function and its constrains to get optimal design of such topologies are suggested to get proper reactive...
Active neutral-point clamped five-level (ANPC-5L) converter is an attractive topology for 1500V photovoltaic generation system. In this paper, a novel and reliable modulation strategy for the active neutral-point clamped five-level inverter, including the balance control strategy of the flying capacitor voltage are proposed. In order to improve the harmonic characteristics of the output current and...
This paper proposes a novel topology based on the interleaved H-bridge qZS inverters that is intended for the single-phase photovoltaic systems. The potential benefits are the reduced passive components and improved quality of energy generation. To control the novel topology, a proper modulation technique was developed with the required phase-shifted carriers signals and shoot-through states.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.