Field Demonstration of Renewable Integration in the Island System Considering the Future Power System Reform (Niijima Project)

2018 ◽  
Vol 138 (11) ◽  
pp. 746-749
Author(s):  
Jumpei BABA ◽  
Hiromi KONDA
Keyword(s):  
Power System ◽  
System Reform ◽  
Renewable Integration ◽  
The Future ◽  
Island System

scholarly journals The Flexible Operation of Coal Power and Its Renewable Integration Potential in China

2019 ◽  
Vol 11 (16) ◽  
pp. 4424 ◽  
Author(s):  
Chunning Na ◽  
Huan Pan ◽  
Yuhong Zhu ◽  
Jiahai Yuan ◽  
Lixia Ding ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Power System ◽  
Large Scale ◽  
Renewable Integration ◽  
Flexible Resources ◽  
Feasible Option ◽  
Coal Power ◽  
Simulation Results ◽  
Flexible Operation

At present time, China’s power systems face significant challenges in integrating large-scale renewable energy and reducing the curtailed renewable energy. In order to avoid the curtailment of renewable energy, the power systems need significant flexibility requirements in China. In regions where coal is still heavily relied upon for generating electricity, the flexible operations of coal power units will be the most feasible option to face these challenges. The study first focused on the reasons why the flexible operation of existing coal power units would potentially promote the integration of renewable energy in China and then reviewed the impacts on the performance levels of the units. A simple flexibility operation model was constructed to estimate the integration potential with the existing coal power units under several different scenarios. This study’s simulation results revealed that the existing retrofitted coal power units could provide flexibility in the promotion of the integration of renewable energy in a certain extent. However, the integration potential increment of 20% of the rated power for the coal power units was found to be lower than that of 30% of the rated power. Therefore, by considering the performance impacts of the coal power units with low performances in load operations, it was considered to not be economical for those units to operate at lower than 30% of the rated power. It was believed that once the capacity share of the renewable energy had achieved a continuously growing trend, the existing coal power units would fail to meet the flexibility requirements. Therefore, it was recommended in this study that other flexible resources should be deployed in the power systems for the purpose of reducing the curtailment of renewable energy. Furthermore, based on this study’s obtained evidence, in order to realize a power system with high proportions of renewable energy, China should strive to establish a power system with adequate flexible resources in the future.

Is Sicily the future of Russia? Private protection and the rise of the Russian Mafia

2001 ◽  
Vol 42 (1) ◽  
pp. 186-220 ◽  
Author(s):  
Federico Varese
Keyword(s):  
Soviet Union ◽  
Power System ◽  
Former Soviet Union ◽  
Soviet Power ◽  
The Caucasus ◽  
The Future ◽  
Private Protection ◽  
Definition Of

It is difficult to discuss a phenomenon when one does not know precisely what it is. This problem is particularly vexing in the case of the Mafia. It has been argued that ‘the need for a definition [of the Mafia] is crucial; not just for any definition with some degree of contingent empirical plausibility, but for a definition with some analytical clout’ (1). The word ‘Mafia’ itself has travelled far to distant lands, such as the former Soviet Union. For instance, according to Arkadii Vaksberg, Russian journalist and author of The Russian Mafia, the Mafia is ‘the entire soviet power-system, all its ideological, political, economical and administrative manifestations’ (2). In an article published in a magazine for British executives dealing with Russia, the label Mafiosi is used to lump together bureaucrats, smugglers from the Caucasus, the CPSU nomenklatura accused of embezzling state funds, the late British businessman Robert Maxwell and many others (3).

On the optimal mix of wind and solar generation in the future Chinese power system

Energy ◽  
2015 ◽  
Vol 90 ◽  
pp. 235-243 ◽  
Author(s):  
Matthias Huber ◽  
Christoph Weissbart
Keyword(s):  
Power System ◽  
The Future ◽  
Optimal Mix ◽  
Solar Generation

scholarly journals Evaluating the Potential Contribution of District Heating to the Flexibility of the Future Italian Power System

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 584
Author(s):  
Chiara Magni ◽  
Sylvain Quoilin ◽  
Alessia Arteconi
Keyword(s):  
Power Systems ◽  
Power System ◽  
Large Scale ◽  
District Heating ◽  
Energy System ◽  
Heat Pumps ◽  
Electricity Sector ◽  
Potential Contribution ◽  
The Future ◽  
Promising Solution

Flexibility is crucial to enable the penetration of high shares of renewables in the power system while ensuring the security and affordability of the electricity dispatch. In this regard, heat–electricity sector coupling technologies are considered a promising solution for the integration of flexible devices such as thermal storage units and heat pumps. The deployment of these devices would also enable the decarbonization of the heating sector, responsible for around half of the energy consumption in the EU, of which 75% is currently supplied by fossil fuels. This paper investigates in which measure the diffusion of district heating (DH) coupled with thermal energy storage (TES) units can contribute to the overall system flexibility and to the provision of operating reserves for energy systems with high renewable penetration. The deployment of two different DH supply technologies, namely combined heat and power units (CHP) and large-scale heat pumps (P2HT), is modeled and compared in terms of performance. The case study analyzed is the future Italian energy system, which is simulated through the unit commitment and optimal dispatch model Dispa-SET. Results show that DH coupled with heat pumps and CHP units could enable both costs and emissions related to the heat–electricity sector to be reduced by up to 50%. DH systems also proved to be a promising solution to grant the flexibility and resilience of power systems with high shares of renewables by significantly reducing the curtailment of renewables and cost-optimally providing up to 15% of the total upward reserve requirements.

scholarly journals Analysis of Operation Rules of Provincial Peak Shaving Auxiliary Service Market

2021 ◽  
Vol 236 ◽  
pp. 04013
Author(s):  
Wang Xingkai ◽  
Tang Yijin ◽  
Li Hongze
Keyword(s):  
Power System ◽  
System Reform ◽  
Peak Shaving ◽  
Service Market ◽  
Operating Rules ◽  
Operation Rules ◽  
Economic Operation ◽  
New Energy ◽  
Plant Operations ◽  
Auxiliary Services

In order to implement the requirements of the power system reform, to ensure the safety, stability and economic operation of the power system, and to promote the consumption of new energy, all provinces in China have built the peak-control auxiliary service market, and explore the establishment of a new mechanism for sharing and sharing of peak-control auxiliary services. Based on the operating rules of the peaking auxiliary service market in Xinjiang, Shanxi, Gansu, Fujian, Jiangsu, Jiangxi, Northeast, Anhui, Ningxia, Shanghai, Shandong and other places, the author compares and evaluates the key content of the market operating rules from four aspects: market members and their responsibilities, deep peaking transaction details, emergency start-stop peaking transaction details, and measurement and settlement, and also finds a direction for the provinces to revise or adjust the rules of peaking auxiliary services in the future for the reference of power grid dispatching, power plant operations and other departments, in order to improve the understanding of relevant personnel of the peaking auxiliary service market.

Is Sicily the future of Russia? Private protection and the rise of the Russian Mafia

1994 ◽  
Vol 35 (2) ◽  
pp. 224-258 ◽  
Author(s):  
Federico Varese
Keyword(s):  
Soviet Union ◽  
Power System ◽  
Former Soviet Union ◽  
Soviet Power ◽  
The Caucasus ◽  
The Future ◽  
Private Protection ◽  
Definition Of

It is difficult to discuss a phenomenon when one does not know precisely what it is. This problem is particularly vexing in the case of the Mafia. It has been argued that ‘the need for a definition [of the Mafia] is crucial; not just for any definition with some degree of contingent empirical plausibility, but for a definition with some analytical clout’. The word ‘Mafia’ itself has travelled far to distant lands, such as the former Soviet Union. For instance, according to Arkadii Vaksberg, Russian journalist and author of The Russian Mafia, the Mafia is ‘the entire soviet power-system, all its ideological, political, economical and administrative manifestations’. In an article published in a magazine for British executives dealing with Russia, the label Mafiosi is used to lump together bureaucrats, smugglers from the Caucasus, the cpsunomenklatura accused of embezzling state funds, the late British businessman Robert Maxwell and many others.

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