The significant growth of gas-fired power plants and emerging power-to-gas (PtG) technology has intensified the interdependency between electricity natural gas systems. This paper proposes a robust co-optimization scheduling model to study coordinated optimal operation two energy proposed minimizes total costs systems, while considering system key uncertainties dynamics. Because limitation on exchanging private data challenge in managing complex models, is tackled via alternating direction...

The modern power system is becoming more complicated due to the ever increasing penetration of electronics, which referred as a power-electronics-dominated (PEDS). In this case, analysis, control, and operation entire should tone with energy-paradigm transition pace, where challenges be properly tackled. After brief introduction grid-connected converters, article explores stability PEDSs, especially on low inertia issue multitimescale characteristics, well dynamics when connected weak grids....

As the sharp growth of gas-fired power plants and new emergence power-to-gas (PtG) technology intensify interdependence between electricity natural gas systems, it is imperative to co-optimize two systems for improving overall efficiency. This paper presents a long-term robust co-optimization planning model interdependent minimizing total investment operation costs. Beside generators, transmission lines, suppliers, pipelines, PtGs compressor stations are also considered as candidates...

Recent revolution of the electricity distribution sector, especially a deeper penetration gas-fired distributed generations (DGs), intensifies interdependence on natural gas systems. Such integrated and systems (IENDS) are facing with significant threats from frequent disasters that cause enormous economic losses. Network hardening is regarded as an effective technique for enhancing resilience IENDSs against disasters. This paper presents trilevel robust optimization-based network model...

This paper proposes a distributionally robust scheduling model for the integrated gas-electricity system (IGES) with electricity and gas load uncertainties, further studies impact of demand response (DR) on energy market clearing, as well locational marginal prices (LMEPs LMGPs). The proposed maximizes base-case social welfare (i.e., revenue from price-sensitive DR loads minus production cost) worst-case expected shedding cost. Price-based DRs are formulated via bidding curves while...

The increasing interdependency of electricity and natural gas systems promotes coordination the two for ensuring operational security economics. This paper proposes a robust day-ahead scheduling model optimal coordinated operation integrated energy while considering key uncertainties power system cost. Energy hub, with collocated gas-fired units, power-to-gas (PtG) facilities, storages, is considered to store or convert one type (i.e., gas) into other form, which could analogously function...

Current pulses are convenient to be actively implemented by a battery management system. However, the short-term features (STF) from current originate various sensors with uneven qualities, which hinder one powerful and strong learner STF for state of health (SOH) estimation. This article, thus, proposes an optimized weak formulation procedure lithium-ion SOH estimation, further enables automatic initialization integration learners into efficient estimation framework. A Pareto front-based...

In order to enable the permanent magnet synchronous generator (PMSG)-based wind turbine (WT) capture more energy while providing fast frequency supports effectively during disturbances, this paper proposes a time-sharing coordinated control (TFCC) strategy. Firstly, rotor virtual inertia and DC-link are presented, new adaptive droop considering deviation is proposed. Secondly, novel TFCC strategy, which uses dead-band coordinate regulation priority of above three controls, With proposed...

Temperature monitoring is of paramount importance for guaranteeing the safety and proper operation lithium-ion batteries. Traditional temperature sensors suffer from heat transfer delay, where internal battery cannot be measured directly. Motivated by this, this letter proposes a novel sensorless estimation method based on broadband impedance spectroscopy. In letter, pseudorandom sequence (PRS) with finite signal levels utilized measurements. The information merged into an...

Plant-based foods with low methionine contents have gained increasing interest for their potential health benefits, including neuroprotective effects. Methionine restriction (MR) linked to a plant-based diet has been shown mitigate neurodegenerative diseases such as Alzheimer's disease (AD) through mechanisms that involve the gut microbiota. In this study, 16-week MR (0.17% methionine,

Thyristor-based solid-state circuit breakers (TCBs) have become a popular protection solution for DC microgrids, due to their low construction cost, high efficiency, and fast response time. Despite numerous TCBs being proposed, the majority of them still suffer from controllability, current interrupting reliability, slow fault isolation, poor reclosing protection, conduction loss. Inspired by these issues, novel TCB with three-winding coupled inductor is proposed in this paper. First, it...

Commutation failure, primarily caused by voltage drops and distortion, may lead to high‐voltage direct current (HVDC) power interruption AC system oscillation. To date, there have been few studies on the mechanism prevention of commutation failure based distortion harmonics. This study analyses influence harmonic time area proposes a method for quantitative analysis effects. The shows that limiting DC is an effective mitigate A distortion‐dependent strategy proposed, controller applied...

In this paper, we propose S-Phaser, an indoor localization system that uses a single Wi-Fi access point (AP) to locate terminals. Compared traditional systems based on the fingerprint positioning technology, S-Phaser does not need deploy large number of APs and has better accuracy. utilizes channel state information (CSI) compute direct path length between AP terminals, thereby efficiently improving accuracy in line-of-sight (LOS) scenario. is still able get satisfied non-LOS scenario even...

In this paper, a parallel structure fractional repetitive control (RC) scheme is proposed to improve the performance of pulsewidth-modulation (PWM) inverters in cases where sampling rate digital system not an integral multiple fundamental frequency. By introducing correction factor, new increases gains for all harmonics and locates poles accurately at targeted harmonic frequencies. As result, achieves better tracking rejection than conventional RC. Moreover, controller requires less data...

Online parameter identification is vital for boosting the accuracy of battery equivalent circuit model (ECM) under dynamic profiles. However, traditional recursive least squares (RLS) method easily decays with noise corruption from sensors or insufficient exciting signal in reality, which further limits performance ECM modeling and states estimation. This article thus proposes a reliable online ECM, utilizes well-designed information appraisal procedure based on Fisher-information-based...

This paper studies the impact of inherent characteristics on initial-stage short-circuit current modular multilevel converter based multi-terminal direct (MMC-based MTDC) transmission system. A calculation method input-output is proposed. The MMC's are factorized into a series combination linear and nonlinear part through operator approach. system represent properties MMC-based MTDC system, which unrelated to fault. Therefore, currents decoupled quantitative indices proposed measure current....

State-of-charge (SOC) estimation of lithium-ion (Li-ion) batteries with good accuracy is critical importance for battery management systems. For the model-based methods, electrochemical model has been widely used due to its and ability describe internal behaviors battery. However, uncertainty parameters lack correction from voltage also induce errors during long-time calculation. This paper proposes a particle filter (PF) based method estimate Li-ion batteries’ SOC using model, sensitive...

Unexpected sideband harmonics of the cascaded H-bridge (CHB) inverters will appear in unbalanced conditions among cells and may result harmonic pollution even resonance. The linear controller to suppress output voltage distortion is destined be ineffective due nonlinear characteristic harmonics. Focusing on this problem, article, we propose a closed-loop suppression method by adjusting phase-shift angles for <italic xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Frequency security is one of the challenges for power grid penetrated by renewable energy systems (RESs). Virtual inertia provision from RESs considered to be efficient support frequency enhancement. How estimate nadir rapidly and accurately crucial online allocation RESs. This paper develops a generic average system (G-ASF) model at first. The low-order speed governing SG proposed enhance accuracy flexibility G-ASF model. Then, based on model, an strategy grid-connected under constraint...