The quasi-Z source (qZS) cascaded multilevel inverter (CMI) (qZS-CMI) presents attractive advantages in application to photovoltaic (PV) power system. Each PV panel connects an H-bridge qZS (qZSI) form a generation module. distributed maximum point tracking and all modules' dc-link peak voltage balance can be achieved. However, it is the same with conventional CMI that second-harmonic (2ω) current ripples exist each qZSI It crucial for qZS-CMI design reasonable network parameters limit...

The increasing of grid-connected variable renewable energy (VRE) on the demand side causes balance problems in power system. Thus, dealing with uncertainty, variability, and consequently, flexibility requirement is becoming an urgent challenge to system operators. Virtual plant (VPP), which bundles different types small-scale distributed resources (DERs) into a single unit for optimization will effectively mitigate those uncertainties. An optimal VPP management method proposed this article...

Distributed renewable energy requires market-based measures to remain competitive as subsidies are phased out. However, the intermittence and volatility of power generation lead great challenges in decision-making. To address uncertainty issues induced by inaccurate RE forecast, this paper proposed a peer-to-peer transactive trading strategy for multiple microgrids based on distributionally robust optimization. First, an fuzzy set Wasserstein distance is created prediction errors each...

The benefits of small-scale renewable energy resources are restricted by a feed-in-tariff strategy that works with distribution grids only. Virtual Power Plant (VPP) aggregates diverse distributed on the demand side for efficient control, which can improve their revenue and encourage growth energy. Based general Nash bargaining theory, this paper proposes multi-VPP energy-sharing mechanism. This approach enables VPPs to increase engaging in peer-to-peer transactions. First, bargaining-based...

The renewable energy sources based distributed generation is increasingly penetrating into conventional distribution network . Aside from the technical and economical benefits, may incapacitate sensitivity of backup protection devices , which face partial blindness in grid-connected, even full islanded mode operation during high impedance faults. This paper proposes a novel stratagem to completely plummet relay by inducing artificial fault current. A severity index developed induce current...

This paper proposes an analytic model to calculate the double fundamental frequency (2ω) voltage and current ripples for single-phase quasi-Z-source inverter (qZSI). The enables exact calculation of 2 Ω components inductor capacitor voltage, which is crucial designing a qZSI system. A guideline selecting capacitance inductance in (qZS) network limit both dc-link input 2ω within tolerable range presented. Three cases are tested verify proposed design method by using simulation experimental...

Renewable energy sources have a variable nature and are greatly depending on weather conditions. The load is also uncertain. Hence, it necessary to use power reserve equipment compensate unforeseen imbalances between production load. However, this must be ideally minimized in order reduce the system cost with satisfying security level. quantification of could calculated through analysis forecasting uncertainty errors both generation Therefore, paper, back propagation artificial neural...

Due to renewable energy sources (RES) variable nature and their wide integration into power systems, setting an adequate operating reserve is important compensate unpredictable imbalance between generation consumption. However, this should be ideally minimized reduce system cost with a satisfying security level. Although many forecasting methodologies have been developed for load demand, management tools decision making of are still needed. This paper deals quantification through uncertainty...

Accurate sizing of power reserve (PR) due to inaccurate forecast both renewable energy sources (RES) and load demand in a microgrid can provide substantial cost reductions. This paper proposes two strategies dispatch the PR into different generators. The first one uses only micro gas turbine (MGT). second MGTs plus PV based active generators (AGs). latter enables RES cover system for some period during day. To implement those methods, firstly an urban with is introduced. Then, day-ahead...

In this study, an intelligent energy management method is introduced to deal with the hydrogen-dominant hybrid system low carbon consideration. Specially, both new type fuel cell, solid oxide and chemical battery are subtly modelled construct a high-efficient system, in which thermodynamics feature accurate model characteristics, as well effect, considered. Because incorporates various complex dynamic operation features that hard capture via conventional strategy, based on deep reinforcement...

This paper proposes an energy stored quasi-Z source (qZS) cascaded multilevel inverter (ES-qZS-CMI) based photovoltaic (PV) power generation system. The system combines advantages of both the qZS and inverter; moreover, uses a battery in each module to balance stochastic fluctuations PV injected grid. also effective control scheme for ES-qZS-CMI system, using which can achieve distributed maximum point track (MPPT) panel, between different modules, provide desired Simulation experimental...

As the proportion of grid-connected variable renewable energy (VRE), mainly wind and solar photovoltaic (PV), getting higher, demand for flexibility in power system increases intensely, posing unprecedented challenges to economic stable operation system. In order meet growing needs, new technologies such as rapid grade climbing highly flexible combined cycle gas turbine generation will be required on supply side, well storages. addition, expansion trans-regional transmission capacity another...