Cost Performance Tradeoff Study of Wind Systems: Grid-Scale Storage

Author(s):  
Navid Goudarzi ◽  
John Rudesill ◽  
Alex Pavlak

Variability and uncertainty are the primary challenges for power generation from intermittent, non-dispatchable energy sources. This stochastic behavior could significantly increase the cost of energy. An earlier work developed an interdisciplinary economic model using three-year (2011–2013) wind/load data from two different sites, Pennsylvania New Jersey Maryland Interconnection LLC (PJM) in USA and EirGrid in Ireland. Results showed a wind plus natural gas system can reduce emission as much as 50% below that of an all-natural gas system, with only a slight increase in system cost. Energy storage can be a key element in obtaining energy and cost savings, together with providing availability, reliability, and security of energy supply to consumers. In this paper, grid-scale storage parameters variations (storage capacity, cost, and efficiency) are explored to obtain levelized cost trends for wind systems with storage.

Author(s):  
Abel ESTOA PÉREZ

LABURPENA: Gas naturalaren arloan daukagun sistema deskribatzen du lan honek, abiapuntu garbia jarrita: 1/2019 Errege Lege Dekretua bete beharrez MLBNk onartu zituen lehen zirkularrak. Zirkularrek instalazioetarako sarbidea, balantzea eta ordainsaria arautzen dituzte, baita aktibo horien kostua berreskuratzeko behar diren bidesariak ere. Sarbidearen zirkularrak «sistemaren birtualizazioa» amaitzen du, hau da, GNL-tanga bakarra sortzen du, hartara —espero izatekoa denez— efizientzia handiago lortzeko eta prezioak jaisteko. Balantze-zirkularraren ardatza iruzurra prebenitzea da; eska daitezkeen bermeak doitu, eta, urraketa larrietan, eragiketak desegitea ahalbidetzen du. Ordainsari-metodologiek ordainsariak murriztea ekarriko dute, arrisku txikiko jarduerak kosturik txikienean egin behar direla dioen printzipioa aintzat hartuta. Bidesarien bidez, ordainsari hori berreskuratu egingo da, hain zuzen ere 2021eko urtarrilaren 1ean hasten den sei urteko ordainsari-aldian. ABSTRACT: This work describes the natural gas system that results from the first regulations (circulars) approved by the CNMC according to the Royal Decree-Law 1/2019. The circulars regulate third party access to the facilities, their balance and remuneration, as well as the tariffs necessary to recover the cost of these assets. The access circular culminates the “virtualization of the system” with the creation of a single LNG tank that will hopefully allow for greater efficiency and lower prices. The balance circular is focused on preventing fraud. It readjusts the required guarantees and, in serious infringements, allows operations to be undone. The retribution methodologies will entail the reduction of the remuneration according to the principle of carrying out a low-risk activity at the lowest cost. Through the corresponding tariffs, this remuneration will be recovered during the six-year period that begins on January 1, 2021. RESUMEN: Este trabajo describe el sistema de gas natural que resulta de las primeras circulares aprobadas por la CNMC en cumplimiento del Real Decreto-ley 1/2019. Las circulares regulan el acceso a las instalaciones, su balance y retribución, así como los peajes necesarios para recuperar el coste de esos activos. La circular de acceso culmina la «virtualización del sistema» con la creación de un tanque único de GNL que permitirá, cabe esperar, mayor eficiencia y una reducción de precios. La circular de balance se centra en prevenir el fraude. Reajusta las garantías exigibles y, en incumplimientos graves, permite deshacer operaciones. Las metodologías de retribución supondrán la reducción de las retribuciones atendiendo al principio de realización de una actividad de bajo riesgo al menor coste. A través de los peajes se recuperará esa retribución durante el periodo retributivo de seis años que se inicia el 1 de enero de 2021.


Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3400
Author(s):  
Jie Xing ◽  
Peng Wu

Bidirectional coupling systems for electricity and natural gas composed of gas units and power-to-gas (P2G) facilities improve the interactions between different energy systems. In this paper, a combined optimization planning method for an electricity-natural gas coupling system with P2G was studied. Firstly, the characteristics of the component model of the electricity-natural gas coupling system were analyzed. The optimization planning model for the electricity-natural gas coupling system was established with the goal of minimizing the sum of the annual investment costs and the annual operation costs. Based on the established model, the construction statuses for different types of units, power lines, and pipelines and the output distribution values for gas units and P2G stations were optimized. Then, the immune algorithm was proposed to solve the optimization planning model. Finally, an electricity-natural gas coupling system composed of a seven-node natural gas system and a nine-node power system was taken as an example to verify the rationality and effectiveness of the model under different scenarios.


2016 ◽  
Vol 48 ◽  
pp. 257-264 ◽  
Author(s):  
Lin Zhu ◽  
Le Zhang ◽  
Junming Fan ◽  
Peng Jiang ◽  
Luling Li

2019 ◽  
Vol 362 ◽  
pp. 412-423 ◽  
Author(s):  
Ahmad BahooToroody ◽  
Mohammad Mahdi Abaei ◽  
Ehsan Arzaghi ◽  
Farshad BahooToroody ◽  
Filippo De Carlo ◽  
...  

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