Multi-energy supplemental renewable energy system with high proportion of wind-solar power generation is an effective way "carbon neutral", but the randomness and volatility seriously affects safe stable operation grid. With development storage technology, this problem can be effectively solved by configuring storage, how to reasonably configure one key issues due expensive storage. To end, a multi-timescale nested capacity optimization model for multi-energy pumped hydro plant based on...

In this paper, the model of Archimedes wave swing (AWS) based energy conversion (WEC) system is proposed where a new coordinate transformation for linear permanent magnet generator between <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">abc</i> frame reference and xmlns:xlink="http://www.w3.org/1999/xlink">dq0</i> LPMG in suitable power dynamic stability analysis derived first time. Since output induced voltage both vary, full-scale back-to-back...

Optimal control of large-scale wind farm has become a critical issue for the development renewable energy systems and their integration into power grid to provide reliable, secure, efficient electricity. Among many enabling technologies, latest research results from both community computational intelligence (CI) have demonstrated that CI could key technical innovations this challenging problem. In paper, we propose sensitivity analysis approach based on trajectory frequency domain...

Due to the coupling network constraints, prosumers' trading strategies influence each other. This article analyzes generalized Nash equilibrium (GNE) formulated by prosumers and proposes a distribution locational marginal price (DLMP)-parametrized alternating direction method of multipliers (ADMM) algorithm seek GNE peer-to-peer (P2P) transactive energy trading. We first present system operator's models in P2P market. To explicitly add constraints problems, we linearize power flow model...

The direct-drive wave energy conversion (WEC) system adopts power takeoff technique and the linear permanent magnet generate (LPMG) is coupled directly to floater, which leads simple configuration high efficiency. This type of device usually has common features in term structure, model, optimal control strategy, conditioning. Taking AWS as example, models WEC are first presented, recommendations also proposed for their applications. To extract maximum from wave, be regulated resonance with...

Compared with full-SiC mosfets converters, the hybrid utilization of Si/SiC converters is an alternative approach to achieve tradeoff between performance and cost. A systematic method proposed generate 2-SiC 4-SiC three-level active neutral-point-clamped (3L-ANPC) inverter topologies from two types switching cells based on arrangement freewheeling paths. The 3L-APNC 3L-ANPC are analyzed in detail states modulation strategies given. power losses quantitatively compared inverter. junction...

Because failures in distribution systems caused by extreme weather events directly result consumers' outages, this paper proposes a state-based decision-making model with the objective of mitigating loss load to improve system resilience throughout unfolding events. The topologies including on/off states feeder lines are modeled as Markov states, and probabilities from one state another determined component failure A recursive optimization based on decision processes (MDP) is developed make...

Compared with full-silicon-carbide (SiC) mosfet converters, the hybrid utilization of Si/SiC converters is an alternative approach to achieve tradeoff between performance and cost. In this article, a 2-SiC five-level active neutral-point-clamped (5L-ANPC) full-bridge inverter proposed. The proposed constructed by combining 3L-ANPC half-bridge two-level arm. operation principle using conventional modulation scheme analyzed in detail. Furthermore, dedicated lower conduction losses. calculated...

Since wave fluctuates continuously, the forecast of energy is very important for operation power systems integrated with large-scale generation. A combined model day-ahead based on improved grey BP neural network (BPNN) and modified ensemble empirical mode decomposition (MEEMD) -autoregressive moving average (ARIMA) proposed in this paper. Firstly, decomposed into wind waves swells by theories. Secondly, correlation between speed analyzed BPNN, height can be forecasted historical data....

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Archimedes wave swing (AWS)-based energy conversion (WEC) is the first device adopting direct-drive power takeoff. The linear permanent magnet generator (LPMG) employed to convert electric power. In this paper, characteristics of LPMG are discussed in detail using model <formula formulatype="inline"><tex Notation="TeX">$dq0$</tex> </formula> reference frame established by authors a previous work...

In this paper, a new systematic method is proposed to analyze the system frequency in power systems under uncertain variability (UV). UV gradually increases systems, which originates from renewable energy generation, random loads, measurement, and communication channels, exerting noteworthy impacts on dynamic frequency. The modeled as stochastic process paper. Then, differential equations are used describe response (SFR) of UV, based SFR model. To assess dynamics an index intra-range...

The wind speeds of each turbine generator (WTG) are the basis for establishing an aggregated model a farm power system transient simulation. However, commonly obtained operation data do not include WTG. Thus, modeling method WTGs same moment inside was proposed. A speed combination (WSCM) is established via K-means clustering from sorted field-measured data, which can provide reasonable WTG when aggregate farm. Subsequently, improved two-step proposed, by initially clustered according to...

Complementary planning and operation of intermittent renewable energy with storage technology is a promising option to accommodate generation. To improve the utilization rate wind photovoltaic generation, this paper proposes multi-objective capacity optimization model wind-solar-pumped hybrid system. The objectives proposed include minimizing total investment cost, maximizing system economic revenue improvement operation. transmission line constraints are involved as well. transformed into...

Since doubly-fed induction machine pumped storage hydro (DFIM-PSH) unit can adjust active power flexibly through adjustable-speed operation, it has frequency regulation capability in both generating and pumping modes. In order to explore the of DFIM-PSH under different working conditions, this paper develops a control module for mode, which is quite from that then optimizes parameters aimed at minimizing deviation multiple operating conditions. Based on dynamic model unit, system response...

In this paper, a robust approach to the energy storage system (ESS)-based stabilizer is proposed select its installation location, feedback signals, and damping control loop, tune parameters. Based on linearized model of power with ESS application torque analysis (DTA), maximum all minimum indices (DTIs) under multi-operational conditions used as index for selecting locations, signals loops. The operational condition DTI provides tuning ESS-based parameters operation. And proper compensation...

Fractional Frequency Transmission is a competitive technology for offshore wind power transmission. Modular Multilevel Matrix Converter (M <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> C) plays key role in System (FFTS) as the frequency changer. M C broadly considered AC-AC converter future with its attractive advantages high voltage and applications. Due to lack of DC link, electrical quantities at different frequencies from two AC...

Introducing pumped storage to retrofit existing cascade hydropower plants into hybrid (HPSPs) could increase the regulating capacity of hydropower. From this perspective, a configuration optimization method for multi-energy complementary power generation system comprising hydro, wind, and photovoltaic is developed. Firstly, address uncertainty wind outputs, K-means clustering algorithm applied deal with historical data on load photovoltaic, water inflow within specific region over past year....

The sub-synchronous oscillation (SSO) characteristics and suppression strategies of a hybrid system comprising doubly fed induction generator (DFIG)-based wind turbines synchronous pumped storage units connected to the power grid via series-compensated transmission lines are analyzed. A modular modeling approach is used construct detailed model, including turbine shaft system, DFIG, converter control machine, excitation stabilizer (PSS), lines. Eigenvalue calculation-based small-signal...