The capacitive-coupling inverter (CCI) is more cost-effective in reactive power conditioning and enhanced regulation ability when compared with the inductive-coupling (ICI). As capability vital for a microgrid (MG) system, new MG frame hybrid parallel-connected ICIs CCIs was proposed this paper. With lower DC-link voltage CCI, an adaptive sharing method reducing total rated losses. A power-sharing control layer based on back-propagation neural network that guarantees rapid accurate ratio...

Due to the lack of support from main grid, intermittency renewable energy sources (RESs) and fluctuation load will derive uncertainties operation islanded microgrids (IMGs). It is crucial allocate appropriate reserve capacity for economic reliable IMGs. With high penetration RESs, it faces both environmental challenges if we only use spinning support. To solve these problems, a multi-type scheme IMGs proposed according different characteristics generation, load, storage. The risk due...

The insulated gate bipolar transistor (IGBT) is widely used in the power electronic system, but its aging state difficult to predict advance due complicated failure mechanism, which will affect performance of equipment, and even cause serious disaster. Therefore, we propose a combined prediction model based on adaptive VMD decomposition (AVMD) attention-based gated recurrent unit (GRU-AT) achieve accurate IGBT. For nonlinear characteristics IGBT characteristic parameters, AVMD with key...

The integration of distributed wind farm leads to additional fluctuation power flow in a high‐voltage distribution network, which has become major concern automatic voltage control. This study proposes slack optimal control method determine the tolerance band gateway reactive (GRP) takes into account constraints, energy loss and excessive operations devices. Analysis network characteristics shows that GRP should be set according both load levels outputs farm. Based on analysis, active...

Wind power has made rapid progress in the last few years. However, large-scale wind integration exerts negative influence to system. One of problems is that with current supplied by farm feeder, relay protection may be incorrect trip or miss trip. To study on positive sequence voltage polarized impedance relay, this paper gives a mathematical analysis relay's operation equation. And simulation turbine driven doubly fed induction generator accomplished PSCAD software verify analysis. The...

With the roll-out of smart meters, data-driven methods based on meter data have become an important technical direction for consumer phase identification in low-voltage distribution network (LVDN). However, as a result poor communication quality, human error, electricity theft and other reasons, obtained power consumption consumers is incomplete cannot fully reflect LVDN, which affects recognition performance existing methods. Under this background, paper proposes algorithm correlation...

In order to solve the impact of massive wind power and solar power's grid-connection volatility on safe stable operation grid.By analyzing complementary characteristics power, hydro pumped storage regarding as an entire generation system.Considering multiple constraints, there proposes two optimal scheduling models with minimum system thermal unit equivalent load. Then we use beetle antennae search algorithm models. Simulation results indicate that can track optimization objectives well...

The performance of optimal reactive power dispatch is affected by the uncertainty transmission line parameters (i.e., resistance, reactance, and shunt admittance). To address this problem, a basic robust optimization (BRO) model presented, where modeled using an set. However, BRO tends to return overconservative solution. Motivated this, improved with feedback correction (FCRO) proposed mitigate conservativeness model. FCRO procedures replace excessively strict constraints represented...

Transmission lines' parameters cannot be measured precisely by current measurement technologies, while those are assumed exactly accurate in previous optimal reactive power dispatch (ORPD) models. The inaccurate of transmission lines would present adverse impacts on ORPD, such as leading to an infeasible result practical systems. Motivated this, a robust optimization approach for ORPD against the uncertainty is proposed this paper. Firstly, model presented deal with parameters, where...

The concept of optimal reactive power supply is introduced. value derived from a two buses model. An control strategy called optimization oriented slack (RPOOSC) put forward. Furthermore, an method using for radial network proposed as application (RPOOC). uses load variable and state variable. can effectively reduce active loss transmission lines, it easy to realize. A simulation carried out reflect the effect compared with another method, which widely acknowledged. And results show that...

Reactive power optimization has been a hard problem for years. However, the existed algorithms are usually complex in calculation and not obvious physical meaning. To study simple effective method reactive optimization, this paper puts forward concept of optimal load, proposes called circle method. With circles, presents geometric explanation minimization active loss obtains analytic expression load. And simulation is carried out to verify effectiveness on optimization. The results show that...

Flexible reactive power condition is vital for a microgrid (MG) system. The conditioning character of the capacitive-coupling inverter (CCI) based DG unit distinguishes it from inductive-coupling (ICI) unit. Previous studies indicate that CCI more cost-effective in and regulation ability enhanced. Thus, to improve flexibility MG system, brand-new frame with hybrid connected ICIs CCIs are proposed. Besides, considering can word under lower DC-link voltage, reduce total inverter's capacity...

Due to the continuous expansion of Internet scale, network traffic has experienced an explosive growth, accompanied by increasingly complex structures. Improving detection accuracy malicious and efficiently distinguishing different categories become urgent problem be addressed. Research shown that hybrid approaches combining CNN BiLSTM exhibit strong responsiveness perform well in solving research problems such as video classification, sentiment analysis, emotion recognition. Therefore,...

Abstract In view of the limited capacity for public transformers to accept electric vehicles (EVs) and large cost putting in new supply power parking lot urban buildings, a special transformer sharing mode (STSM) is proposed, where charging station operators utilize buildings stations. To enhance applicability STSM, single regulation joint methods price strategy stations are put up, mathematical model focused on. First all, mechanism established, which EVs guided charge off‐peak off‐station...

Data center is one of the important directions New Infrastructure initiative, and energy efficiency data centers has always been a focus research. Park Energy Internet (PEI) system that emphasizes consumption clean promotion efficiency. The “generation, grid, load, storage, charging” coordination technology PEI will be key to improving centers. So exploring technologies development modes in significant. However, current research on independent each other. Therefore, this study analyzes...

The principal manifestations, causes and harms of automatic voltage control (AVC) mismatch in hierarchical regional large-scale power systems are summarized. Based on the analysis essence AVC mismatch, a game model volt/var is presented. payoff function which consists relevant operation indices certain mechanism includes avails costs was constructed for game. mechanism, interesting extents players towards related strategy combinations. Iterated Elimination Dominated Strategies method adopted...

Photovoltaic power (PV) generation is developing greatly nowadays. However, excessive amount of PV in operation may cause the voltage exceeding upper limit especially distribution grid. To solve this problem, paper proposed a Multivariate Linear Assessment method absorptive capacity network, which indicates how changes with different line parameters. In method, reference 10kV feeder model built according to characteristics, includes cable and overhead line. Then, sensitivities parameters...