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Applications to three-phase electrical utility systems are described in this Part VI of the IEEE C62.92(TM) series. Definitions and considerations related to system grounding where the dominant sources of system energization are current-regulated or power-regulated power conversion devices are provided.
In this paper a new electric power structure for solar powered unmanned aircraft system is proposed. The presented topology is a prospective improvement to both Solong and Zyphyr models. The proposed UAS model utilized Zyphry UAS by using ac bus-line instead of dc bus-line to supply the propellers. The system involves PV array, lithium sulfur based energy management system, dc bus-line, inverter,...
The three-phase current source inverter has the characteristics of accurate current control, high dynamic response speed and strong current limiting ability, and the DC side voltage can be adjusted from zero. In this paper, the three-phase current source inverter topology is studied, the mathematical model of the converter is established in the three-phase static coordinate system and two-phase rotating...
In whole system, the user usually only offers a voltage with noise as input logic voltage to digital receiver, to guarantee the right logic control, it requires that the IC chip must have a stable inversion level with logic high and logic low input voltage. For COMS process, in traditional design scheme, it usually uses a normal digital inverter as input-unit schematic, and changes the width or length...
A muti resonant controller for high-frequency-link single-phase inverter is proposed in this paper. An equivalent circuit, which behave just like conventional unipolar PWM inverter is proposed for the converter. The dynamic model of the inverter, which built in continuous domain, is built. The inverter has the advantages of high efficiency, high power density, low-cost, low noise, bidirectional power...
This paper describes the humanitarian effort to help bring clean water and solar power to people in need along the Amazon River in Nauta, Peru. George Fox University partnered with JungleMaster Ministries to create a long-term development plan, beginning with a full prototype of the system at the NGO's house in Nauta. The engineering design, installation, and test of the system are discussed in detail,...
With the rapid development of hardware and the improvement of control performance requirements, digital control is widely used in power electronics. And due to the mature analysis methods and convenient implantation, the traditional linear control strategies, such as PID control, are directly applied to the design of digital controllers in industrial application. However, as the control delay and...
This paper presents a voltage control strategy for a DC load powered by a three phase inverter connected to a Permanent Magnet Synchronous Generator (PMSG). The DC load consists of a DC capacitor in parallel with the inverter and the unknown current load. The control strategy is designed based on Simple Adaptive Control (SAC) technique. The structure is a cascade controller designed in rotor reference...
Input current of a Current Fed Switched Inverter (CFSI) contains the switching frequency component (75 kHz) and a second harmonic component of line frequency (100 Hz) apart from the DC part. In prior designs, the second harmonic component was suppressed by increasing the size of passive components (inductor or capacitor), which makes the inverter implementation bulky. This paper presents a control...
In this paper, a wireless modular control strategy for input-series output-parallel (ISOP) inverter system is proposed to ensure equal sharing of input voltage and output current among the constituent inverters. Compared with existing control strategies for the ISOP inverter system, such as centralized control which restricts the modularity of the system and distributed control which realizes voltage...
Harmonic resonance issues have been attracted more and more attention due to a large number of power electronic inverters being used in power systems. In this paper, in order to have a deep insight into resonances, the singular value sensitivities with respect to component parameters of the network and the control parameters of inverters are used for harmonic resonance analysis based on Singular Value...
In this paper, a zero-voltage switching DC-AC inverter is designed and realized. The neutral point clamped topology and fix-frequency PWM control are used in the proposed inverter to implement a single-phase DC-AC inverter. Also, an auxiliary inductor and two auxiliary switches are adopted to achieve zero-voltage switching, which can improve the inverter efficiency. In this paper, the proposed DC-AC...
In Digital Grid which has been proposed as a new electric power grid, multi-inverters are operated in parallel and it may cause the cross-current among those inverters, since inverters do not have synchronizing mechanism. In this study, the authors propose a method to control the cross-current caused by the difference in switching frequencies of multi-inverters in parallel operation. An indirect hysteresis...
This paper proposes energy management in smart home with solar renewable energy using smart plug and inverter. Through the smart plug, information on all loads in the home is monitored and collected to an energy management center. Load profiles are managed, and the loads are classified dynamically based on the profiles in the center. When a power failure occurs, the multimode solar inverter supplies...
This paper presents guidelines for passive components design of single-stage buck-boost inverter with unfolding circuit. This inverter has low number of passive components and it is intended for application where a wide input regulation range is required. All theoretical statements are confirmed by simulation results.
Recently, many high-efficiency buck-boost typed inverters for the photovoltaic (PV) grid-connection applications have been proposed. However, the PV grid-connection inverters are in idle state at nighttime or low insolation. Based on green energy demand, the presented work proposes a high-efficiency bidirectional buck-cascaded buck-boost (BuCBB) inverter. It is developed via the connection of a bidirectional...
The development of shore-to-ship power supply technology can effectively reduce port pollution and promote the construction of green port. This paper briefly introduces the technical scheme of the common used inverter for shore power, and then puts forward the technical scheme of multi-terminal medium-voltage DC (MVDC), according to the transmission characteristics of the shore-to-ship power supply...
The multiplex 3-phase winding motors suffer from the problem of the magnetic coupling between the normal winding and the fault winding. To investigate the behaviors of the dual-winding PMSMs on the short-circuited fault conditions, a fault analysis model is developed that includes a dual-winding PMSM circuit model with a short-circuited fault coil within some phase coil and an inverter model with...
The objective of this work is to study and design a solar inverter, of a power of exit of environ 500 VA with a tension of entry of 12 VDC and an exit has purely sinusoidal wave of 230 VAC at a frequency of 50 Hz. The improvements made to the inverter are primarily at the level of the order, with first of all, the generation of a purely sinusoidal wave, but also the monitoring of the tension of entry...
This paper is focused on the operation analysis of transformer-based ac drive system with three modulated converters connected specifically to windings of power transformer. It provides multilevel voltage to induction machine by means of three sets of converter-side windings of power transformer. A special switching scheme has been disseminated for adjustment of converters, insuring synchronization...
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