All possible steady states of a Z-source inverter are identified and analyzed with the objective deriving design guidelines for symmetrical impedance network. This paper shows that, in addition to desired three dynamic states, an operating cycle can contain another static that do not contribute power conversion process. These be avoided by selecting suitably large capacitors inductors. By using equations derived steady-state analysis, this presents network accurately case where is operated...

To minimise the number of load sheddings in a microgrid (MG) during autonomous operation, islanded neighbour MGs can be interconnected if they are on self-healing network and an extra generation capacity is available distributed energy resources (DER) one MGs. In this way, total system shared by all DERs within those However, for purpose, carefully designed supply restoration control algorithm, protection systems communication infrastructure required at MG levels. study, first, hierarchical...

The concept of a feasible operating area for solid oxide fuel-cell power plant is introduced by establishing the relationship between stack terminal voltage, fuel utilization, and current. analysis shows that both voltage utilization factor cannot be kept constant simultaneously when current changes. This leads to two possible control strategies as control. By controlling input hydrogen in proportion current, can accomplished. incorporating an additional external voltage-control loop,...

A capacitor-excited induction generator used with a hydraulic turbine in stand-alone generating system can provide high quality voltage and frequency control not matched by other small units. This is achieved without governor using controllable additional impedance on the load side. The static converter. analysis of design power are presented. Measurements from an experimental unit provided to verify predicted performance.

The fastest and yet most prudent ways of changing the output power level a solid oxide fuel cell plant connected to ac-grid are explored. operating state is examined in term concept feasible area cell. utilization factor stack maintained constant steady-state by feeding natural gas processor at rate proportional current drawn from stack. fluctuations transient due change can be constrained allowable range strategically controlling conditioning unit. Based on measured variables dynamic...

Wind Power plays a major role in both large utility grids and small microgrids due to wide range of socio-economic benefits. Due this reason, current research has an emerging trend enhance its reliability usability. Highly random nature the wind speed direction leads having poor accuracy power forecasting thereby reliability, increased cost reduced efficiency electrical systems. Most updated studies are focused mainly on speed, their prediction errors above industry expectations. In paper,...

A wireless data communication system for future microgrids (MGs) is presented in this paper. It assumed that each MG has a central controller and distributed generation unit the local controller. The responsible transmitting receiving amongst these controllers. This based on ZigBee technology, which low cost power consumption device. However, its main limitation transfer rate. To reduce number of transactions, management scheme required to be transferred are defined suitable coding proposed....

A method to analyze the steady-state open loop behaviour of a self-excited induction generator with an unregulated prime mover is presented. The proposed needs little mathematical effort and does not require assumption about speed. approach based on nodal analysis allows one use arbitrary functions for torque-speed characteristic saturation magnetizing inductance without complicating solution process. It always leads single equation frequency. An example presented demonstrating advantages...

This paper realizes a novel control strategy for the fuel consumption reduction in plug-in hybrid and electric vehicles having an internal combustion engine (ICE) one or more motor/generators. The proposed combines power balancing variable speed to achieve efficient utilization of fossil energy that is consumed over standardized drive cycles. Furthermore, high-efficiency region ICE performance map utilized aid with management decisions. For test bench, three vehicle models have been...

A hybrid NanoGrid (NG) can be considered as the power supply system, for future community houses. In this study, operation and control of an NG are presented. The consists AC bus a DC bus, interconnected through tie‐converter (TC). All loads distributed energy resources (DERs) houses connected to while all their DERs bus. has adequate generation capacity its in off‐grid status well capability exchange with grid. TC exchanges between two buses regulates voltage both buses, case operation....

The focus of this paper is to develop a control strategy for community battery bank in grid-connected microgrid which significant level photovoltaic generation embedded. In order minimize the capacity battery, power transfer interconnection link between and external grid system utilized safe maximum levels. Through Empirical Mode Decomposition analysis net flows microgrid, daily seasonal modes oscillations are identified as two dominant low-frequency components. Whence rule-based operational...

The possible operating states of an impedance network a Z-source inverter are identified and analyzed with the objective deriving design guidelines. Through analysis it is shown that in addition to desired three dynamic states, cycle can contain another static do not contribute power conversion process. These be avoided by selecting suitably large capacitors inductors. By using equations derived steady paper presents guidelines accurately for case where operated only active shoot-through...

This paper discusses the operation of central controller for a microgrid. The is responsible to maintain voltage and frequency microgrid within acceptable ranges while distributed energy resources supply required power demand loads based on droop control. desired ratio among output active determined by distribution network tertiary controller. To achieve dynamic variation ratios resources, has adjust references rated control coefficients. As this may lead unacceptable in microgr-id,...

A hybrid AC-DC nanogrid (NG) can be considered as the power supply system for future community houses. In this paper, operation and control of a NG are presented. The consists an AC bus DC bus, interconnected through tie-converter. Each may have several loads micro sources. should adequate generation capacity to its in off-grid mode well capability exchanging with utility grid. tie-converter exchanges between two buses regulates voltage both case operation. Several studies presented using...

This paper identifies recent plug-in hybrid electric vehicle (PHEV) and (HEV) literature for the purpose of analysis in determining future direction. The authors have utilized expanded on a procedure analyzing control strategies which is found Wirasingha et al. existing allocates into four categories previously determined optimization based blended control, rule multi-mode only given heading paradigms this paper. Extending strategy classification identification paradigms, ranking individual...

This paper shows how multiple interconnected microgrids can operate in autonomous mode a self-healing medium voltage network. is possible if based on network capability, the neighbour are and surplus generation capacity available some of Distributed Energy Resources (DERs) microgrids. will reduce or prevent load shedding within with less capacity. Therefore, DERs microgrid controlled such that they share local as well loads other Different control algorithms proposed to manage at different...

This paper demonstrates power management and control of DERs in an autonomous MG. The focuses on the performance converter-interfaced voltage controlled mode. Several case studies are considered for a MG based different types loads supplied by (i.e. balanced three-phase, unbalanced, single-phase harmonic loads). adjusting magnitude angle their converter output through droop control, decentralized concept. Based this method, can successfully share total demand presence any type loads....