A large number of renewable energy resources are integrated into the system (IES), which complicates IES dispatching, especially for accommodating anti-peak-regulation wind power. To cope with that, a day-ahead optimal dispatching method considering power to gas (P2G) units and dynamic pipeline networks is proposed in this article. First, by introducing P2G, an structure based on hub established implement bidirectional flow between natural systems. Second, characteristic pipelines modeled...

Modular multilevel converter (MMC) is believed the most competitive solution for high-voltage direct current (HVDC) transmission using voltage source converters. Circulating suppressing strategies based on proportional resonant (PR) controllers are widely used in MMC. This kind of can effectively eliminate all circulating components MMC-HVDC. Unfortunately, it result dc-line ripples under unbalanced grid conditions, and thus, deteriorates system performance stability. Moreover, its existing...

A large number of distributed energy resources (DERs) integrate into the distribution network, which changes power flow, increases fluctuations, and complicates scheduling network. To cope with that, a multitimescale method, considers demand response as well user satisfaction, is proposed in this paper. First, day-ahead stage, both generation-side demand-side are combined to minimize operating costs reduce impact DERs. Second, real-time model predictive control method introduced, smoothing...

Owing to a higher energy supply efficiency and operational flexibility, integrated system (IES), including the power, heating, gas systems, will be primary form of in future. However, with increase large-scale stochastic wind power integration, IES planning face significant challenge as traditional system. Therefore, probability-interval-based considering integration is proposed this article. First, conditional value-at-risk (CVaR) based probability-interval method developed describe...

Time-domain steady-state analysis for modular multilevel converter (MMC) can effectively realize the performance evaluation, circuit parameters design, and semiconductor devices selection. However, existing/conventional methods could not always ensure accuracy in full operation range since they are mostly a kind of open-loop method utilizing approximate switching function. This paper proposes closed-loop MMC accurate first constitutes two closed loops inside based on classical circular...

In this paper, new formulations of the power flow and continuation that allow for electro-thermal coupling in transmission lines have been proposed. The capture overhead lines' effects by treating their series resistances as temperature dependent variables. They generate results can differ from conventional markedly, particularly problems centring on line impedances. paper demonstrates applying to transfer limit calculation. Generally, limits are defined either encountering a line's thermal...

This article presents a model predictive control (MPC) based multitime scale co-optimized dispatch for integrated electricity and natural gas system (IEGS) considering the bidirectional interactions renewable uncertainties. In proposed model, optimal is extended into three substages optimization problems of day-ahead, intraday, real-time to coordinate economy accuracy operations. The different strategy designed in each dispatching stage according operating characteristics multienergy coupled...

The emerging prosumers have changed the way traditional distribution systems operate. While harvesting benefits of Distributed Energy Resources (DERs), prosumers' self-dispatching and internal energy trading can also bring technical challenges economic loss to system operator (DSO). To this end, a DSO-prosumers cooperated scheduling framework for transactive system, which considers impact peer-to-peer (P2P) trading, is proposed in paper. First, by incorporating P2P among into scheduling, DSO...

Background Recently, the triglyceride glucose (TyG) index has emerged as a reliable predictive indicator for adverse outcomes of cardiovascular disease. However, roles TyG in patients with acute myocardial infarction (AMI) and low-density lipoprotein cholesterol (LDL-C)≤1.8 mmol/L after percutaneous coronary intervention (PCI) remain unclear. Methods A total 599 diagnosed AMI LDL-C ≤ 1.8 at 1-month follow-up PCI were consecutively enrolled between January 2017 2020. The subsequently divided...

Abstract Background The plasma uric acid to albumin ratio (UAR) is considered as a novel indicator for Inflammation. However, the association between UAR and coronary slow flow phenomenon (CSFP) remains unclear. Methods A total of 1328 individuals with chronic syndrome (CCS) receiving angiography (CAG) found no obvious obstructive stenosis (< 40%) were included in this study. 79 developed CSFP divided into group. 1:2 age-matched patients normal blood allocated control group ( n = 158)....

In addition to maintaining the power balance, major tasks of multi-area automatic generation control (AGC) involve regulating exchange among subareas. This study presents a new flow model allowing for AGC that achieves cooperation participating generators, which are deployed separately in interconnected subarea networks. The formulations subareas derived from active equations tie-lines. node parameters representing level and allocation unbalanced introduced. Then, proposed is established by...

With regard to wind farms connected the main system via dedicated overhead transmission lines, available power absorbed by relies on not only generation capacity but also threshold. Thus, this study centers close relationship between environmental conditions and transfer limits that involve thermal limit steady-state stability limit. Simultaneous equations representing both conductors' heat balance operation are established. In addition, formulations of maximum for derived then expressed as...

The large-scale sharing electric vehicle (SEV) need adequate charging infrastructure to maintain the optimal operation. Considering convenience of SEV users' during driving, a two-stage planning method combining stations and scattered piles for is proposed balance economy operators SEVs users. In first stage, according urban area division trip characteristics SEV, power demand in each placement point can be estimated exactly. Then, aiming minimum annual total cost, mean clustering algorithm...

Smoothing power fluctuations and arranging reserves play a more crucial role in the secure economic operation of active distribution network (ADN), as high penetration rate uncertain renewable energy sources (RES) increases. In this article, multitimescale ADN optimal dispatching model based on stochastic predictive control (SMPC) is proposed to track random fluctuation RES address risk. First, load shedding curtailment risk are quantified by conditional value at probability reserve...

A risk-based distributionally robust real-time dispatch approach is proposed to strike a balance between the operational costs and risk as well considering nodal voltage security even when distribution of uncertainties cannot be precisely estimated. To model uncertainties, data-drive ambiguity set developed based on imprecise probability theory without any presumption uncertainties. The obtained confidence interval, which can constructed according actual needs by choosing point-wise or...