To solve the problems of existing nonisolated PV grid-connected inverters, such as leakage current, power pulsation, and harmonic a single-phase common-ground-type inverter with decoupling capability is proposed in this article. The integration traditional boost converter switched capacitor technology obtains structure that neutral point grid directly connected negative terminal array, current eliminated. Due to time-sharing multiplexing circuit components, which can achieve high step-up,...

Transformer and electrolytic capacitors (Ecaps) in light-emitting diode (LED) drivers lead to increased cost shortened lifespan. Therefore, eliminating the transformer Ecaps of LED driver can not only achieve a lightweight design but also extend service life. In this article, novel single-phase transformerless capacitorless power factor correction rectifier is proposed. The proposed topology shares common ground with grid load. Thus, reduced common-mode current obtained, demand for an...

Given the lack of transformer isolation in operational non-isolated photovoltaic inverters, common mode leakage currents are known to exist within stray capacitance array, leading electromagnetic interference and safety concerns for entire system. This article introduces a novel solution: ground multilevel PV inverter. innovative design is built upon Boost circuit incorporates switched capacitor network connect negative terminal dc side neutral point ac side. The primary objective this...

Microinverter without transformer structure is widely used in photovoltaic grid-connected systems because of its low cost and high efficiency, but the challenge to solve common-mode leakage current caused by voltage. This paper studies a novel transformerless dual-mode voltage source inverter (VSI) which common ground short-circuits parasitic capacitance theoretically completely eliminates currents. The consists switching-buck-boost (SBB) module integrated with an LC filter network has good...

Reducing power transmission path is a new trend to increase the whole efficiency. Moreover, electrolytic capacitors (E-caps) are another essential criterion for judging performance of converters. Based on this, novel single-stage ac/dc converter proposed in this article, which demands fewer semiconductors compared previous works due time-sharing devices; thus lower cost and higher density achieved. The flow decoupling circuit further optimized, where most energy designed transfer directly...

Abstract The energy internet has emerged as a promising area of research in power systems with distributed generation. Similar to an router connect and switch networks, the within plays crucial role integrate distribute flow. This paper provides overview application challenges associated routers internet. Firstly, ability bring together multiple sources information is highlighted. Secondly, discrepancies structure when are utilised different voltage‐level grids discussed. Besides, roles,...

Addressing the issue of dual-frequency oscillation on DC side, caused by absence electrolytic capacitors, a three-port rectifier with automatic power factor correction and decoupling capabilities has been proposed for LED lighting applications. This aims to tackle problems associated improve overall performance systems. Compared existing topologies, converter highly integrates main auxiliary circuit sharing switch, which effectively reduces redundancy elements circuit. The only two switches...

This article presents a method to solve the three major problems of bridgeless rectifiers, that is, existence output filter units, multistage transformation, and dual-frequency power pulsation without electrolytic capacitors (E-caps). In this article, virtual port is introduced integrated with main circuit. Meanwhile, sharing devices greatly reduces redundant devices, especially high-loss magnetic devices. An excellent switching control scheme ensures adaptability under decoupling capacitor...

The lightweight and the electrolytic capacitor-less are development trends of microconverters for transportation lighting applications. Some solutions available to address power fluctuations caused by capacitor-less. However, leakage currents nonisolated converters have been little studied. Given this, an improved transformerless single-phase rectifier based on virtual dc-bus concept is proposed in this letter. This solution connects negative LED array directly grid neutral, thus shorting...

Reducing power transmission is a new trend to increasing the whole efficiency. Meanwhile, presence or absence of electrolytic capacitor (E-cap) another important criterion for judging performance LED drivers. Based on this, single-stage AC/DC converter proposed in this paper, which demands fewer semiconductors compared previous works due magnetic integration technology and time-division multiplexing devices, thus lower cost higher efficiency achieved. And, flow decoupling circuit further...

One of the main challenges is how to prolong lifetime converters, and as in most single-phase need for electrolytic capacitors. A simple structure rectifier proposed with lossless buffer power factor correction (PFC) abilities. It has advantages low cost, fewer auxiliary components, high conversion efficiency. The active circuit an unit consists just one capacitor switch. not only makes it possible operate without capacitors but also provides zero voltage switching (ZVS) tank. Additionally,...

High-brightness light-emitting diodes (HB-LEDs) is next generation of green lighting. However, the bulky electrolytic capacitor in converters required to compensate difference pulsating power, thereby restricting lifetime whole system. Meanwhile, existence full-bridge rectifier circuit and multi-stage transformation hinders further improvement power density. In this paper, a three-port network for single-stage bridgeless LED driver proposed with way sharing so as reduce use devices, thus...

To obtain the required LED-driving current, variable frequency control directly leads to large reactive circulation, and design of electromagnetic interference circuit is more complex. However, soft switching cannot be guaranteed by constant operation under load variations. Hence, a multiplex LED-dimming based on inductor proposed that completes realizes zero-voltage improve efficiency. The with superimposed half-bridge structure increases number outputs simultaneously shares resonant so...