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Networked DC nano-grids are based on simultaneous power and data transfer between nodes of the power distribution networks. The node of a networked DC nano-grid can be realized using a multi-port power converter. The multiport power converter integrates several loads within a single unit. Hence, the number of power converters of a system can be minimized to reduce cost, complexity, and to improve...
In this paper a detailed description of the design and simulation of a DC ultra-fast recharging station for Electric Vehicles is carried out. The system consist of a single AC/DC grid connected inverter, a DC-Bus and two DC/DC converter to recharge the batteries of the EVs. The system also has the vehicle-to-grid (V2G) capability. The design of the components of the system and the control schemes...
Solar race cars require compact components operating at high efficiency. This paper proposes the use of a coreless axial flux permanent magnet machine, which has the attributes of low stator mass, negligible core loss and virtually zero cogging torque, as the propulsion motor. A three-phase inverter with its dc bus fed from a three-port DC/DC converter, which accepts inputs from a solar panel and...
This paper further describes our work presented in Industry Application Society 2016 Conference, with more details related to the control and operation of the microgrid. The DC microgrid facility was custom designed and implemented at CCNY with minimal off-the-shelf components to enable flexibility and reconfiguration capability. The design steps, requirements, and experimental results of the developed...
Solar photovoltaic (PV) renewable energy systems are undergoing major technological developments and large-scale field deployment and electric grid integration. This paper proposes a method of expanding the capacity of an existing irrigation farm with additional pumps powered by solar PV. The system includes PV arrays and battery energy storage connected to a common dc bus, which energizes an array...
This paper shows the design of a solar tree PV system for charging mobile devices on open urban areas. The solar unit tree was designed according to the environmental conditions of Medellin. Based on the electric consumption calculations of mobile devices, a 3.5 m height-tree was built. It has four leaves made of acrylic with solar panels on the top (SOW sized 54 × 83.2 cm). It illuminates with cold...
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,...
Electricity in rural area of Indonesia is mostly in small-scale with diesel generator as the main power source. These diesel generators are mostly in the latter stage of operational age, thus have limited capability and poor performance. Microgrid has been introduced lately, as a system to integrate more renewable energy sources to the existing power system. Photovoltaic (PV) source is one of the...
The isolated electrical system is the one solution for electrical distribution in the archipelago. Any disruption to this system would disserve the public and detriment the utility companies because it can't sell the energy. The problem of an isolated solar plant failure is happened in Indonesia exactly in System A. Currently, there are few references that address the investigation of real cases problem,...
Multiport Converter gets growing applications due to its advantages of flexible control mode, high power density, bidirectional power delivery capability etc. In this paper, a DAB based partial isolated DC-AC multiport power converter, which combines photovoltaic panel, battery storage and grid connection is studied. Modulation method, analysis for power transmission and control design are provided...
Eco mode UPS will power the load with mains power supply directly when the quality of mains power supply is good. When the quality of mains power supply decreases Eco mode UPS will switch to double conversion mode rapidly to meet the requirement of power quality. Eco mode UPS has the highest efficiency and the highest reliability. Using Eco mode UPS is an important measure of data center energy saving,...
A modular UPS system is generally presented as having a much higher level of availability than a monolithic, double conversion, on-line UPS system. However, there are different types of modular UPS systems available on the market, with varying degrees of reliability and availability. To represent the strengths and weaknesses of each architecture and accurately compare them to one another, a detailed...
The voltage source inverters operating in islanded microgrid are used as sources of power similar to synchronous generators (SG) in conventional power system. Unlike synchronous generators, these inverters neither have a natural droop (P-f and Q-V) characteristics nor rotational inertia. The electrical time constant is much lesser than mechanical time constant and hence the load changes will show...
Wireless charging of electric vehicles (EVs) is going to play a major role in electrification of transportation. This paper proposes to utilize an LCL tuned primary and series tuned secondary with a secondary buck regulator to achieve power transfer control by secondary side control only. Analytical expressions for base (primary) coil current and transformer turns ratio N required to transfer the...
This paper presents a single-stage isolated softswitching tri-port converter for integrating a renewable resource like solar PV, and energy storage with single-phase AC grid through high-frequency galvanic isolation. The single-stage approach reduces the component count, and the full-range softswitching feature realizes higher efficiencies compared to the state-of-the-art methods. A significant advantage...
This paper presents a compact power control unit (PCU) for hybrid electric vehicles. The authors use silicon carbide (SiC) MOSFET power modules with insulated ceramic substrates, resulting in high thermal conductivity. In addition, direct connection of aluminum-made chassis of a reactor and a capacitor to the heat sink makes it possible to highly release heat generation of them. These two measures...
In this paper, three control strategies for a wide band-gap bidirectional DC-DC converter (BDC) are introduced and combined to improve the vehicle traction system performance. A feed-forward control algorithm is proposed to reduce the voltage ripple of DC-link capacitor located between the BDC and traction inverter. Through voltage control of the BDC, both three-phase short and uncontrolled generator...
In this paper, a three loop control strategy (TLCS) based on decoupled zero voltage switching angle (ZVSA) loop is proposed for a series-series (SS) compensated wireless power transmission (WPT) system. To realize constant current charging for EVs and ZVS operation of primary inverter, variable frequency and phase shift control strategy (VF-PSC) is adopted. However, the control variables that are...
This paper proposes a new configuration of a single-phase hybrid inverter with an integrated battery energy storage, which is suitable for residential households to maximize local consumption of solar energy and thus reduce dependency on grid support. The hybrid inverter is called Direct Storage Hybrid (DSH) Inverter. A transformer-less topology such as HERIC, operating at low frequency to generate...
A battery-assisted qZSI features buck/boost characteristic by introducing shoot-through states. It makes full use of the fluctuant power, which generated from photovoltaic or fuel cell, by the energy-stored battery paralleled to the quasi-Z-source capacitor. Previous studies discussed the steady state performance and energy storage management for batteries. However, the dynamic tracking performance...
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