scholarly journals Comprehensive Evaluation of Coordination Development for Regional Power Grid and Renewable Energy Power Supply Based on Improved Matter Element Extension and TOPSIS Method for Sustainability

2016 ◽  
Vol 8 (2) ◽  
pp. 143 ◽  
Author(s):  
Xiaomin Xu ◽  
Dongxiao Niu ◽  
Jinpeng Qiu ◽  
Meiqiong Wu ◽  
Peng Wang ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Power Supply ◽  
Comprehensive Evaluation ◽  
Power Grid ◽  
Regional Power ◽  
Topsis Method ◽  
Coordination Development

scholarly journals Study on Renewable Energy Accommodation Capacity Assessment Method Based on Time Series Production Simulation

2021 ◽  
Vol 2076 (1) ◽  
pp. 012022
Author(s):  
Yinsheng Su ◽  
Qian Ma ◽  
Qiang Zhang ◽  
Quan Yuan ◽  
Xinlei Huang
Keyword(s):  
Time Series ◽  
Renewable Energy ◽  
Power Transmission ◽  
Power Grid ◽  
Assessment Method ◽  
Energy Output ◽  
Series Production ◽  
Regional Power ◽  
Energy Accommodation ◽  
Unit Output

Abstract In order to solve the problem of low accommodation rate of renewable energy in a single region, considering the output characteristics of wind power and photovoltaic, grid constraints and cross regional power exchange, an optimization model of renewable energy accommodation capacity in a cross regional power grid year is established. This paper analyzes the factors restricting the accommodation capacity of renewable energy, and determines the access scale of renewable energy units according to the characteristics of different power grid scale, load and power supply structure. And then taking the annual maximum accommodation capacity of renewable energy as the goal, the time series production simulation model is established, considering the constraints such as regional load balancing, power transmission and output of the network cable, unit output, unit optimization power ramp rate and renewable energy output. To improve the renewable energy accommodation capacity, the three factors of power system interconnection level, power regulation performance and load characteristics can be considered.

A Study on Operation Optimization of Chain SVG in Stabilized Voltage of Rural Power Grid 220kV Transformer Substation

2015 ◽  
Vol 713-715 ◽  
pp. 1306-1308 ◽  
Author(s):  
Kun Ya Guo ◽  
Peng Jin ◽  
Shu Han Wang ◽  
Jian Sun
Keyword(s):  
Power Supply ◽  
Reactive Power ◽  
Comprehensive Evaluation ◽  
Power Grid ◽  
Liaoning Province ◽  
Electrical System ◽  
Operation Optimization ◽  
Transformer Substation ◽  
Set Up ◽  
Operational Modes

In a rural power grid 220kV transformer substation in Liaoning Province, because of the appearance of a lot of new impact loads in the power supply area, the original reactive power repertory can not meet the existing load need. As a result, the output 66kV voltage fluctuation affects the power supply security of the users. After a comprehensive evaluation, it is planned to set up a set of ±100M SVG to increase the reactive power repertory to stabilize the system voltage. The electrical system of 220kV transformer substation is huge and often meets with sudden failure; and the capacity of this set of SVG is large, so it may worsen the situation in case of improper control. This paper discusses several operational modes that SVG should have and designs a scheme that can be flexibly switched in several operational modes, which is specifically executed by an overall coordination module. This method has passed the preliminary field operation verification.

Pricing contract design of a multi-supplier-multi-retailer supply chain in hybrid electricity market

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhenning Zhu ◽  
Lingcheng Kong ◽  
Gulizhaer Aisaiti ◽  
Mingzhen Song ◽  
Zefeng Mi
Keyword(s):  
Supply Chain ◽  
Renewable Energy ◽  
Power Supply ◽  
Electricity Market ◽  
Power Grid ◽  
Market Demand ◽  
Competition Intensity ◽  
Content Type ◽  
Hybrid Power ◽  
Grid Connection

PurposeIn the hybrid electricity market consisting of renewable and conventional energy, the generation output of renewable power is uncertain because of its intermittency, and the power market demand is also fluctuant. Meanwhile, there is fierce competition among power producers in the power supply market and retailers in the demand market after deregulation, which increases the difficulty of renewable energy power grid-connection. To promote grid-connection of renewable energy power in the hybrid electricity market, the authors construct different contract decision-making models in the “many-to-many” hybrid power supply chain to explore the pricing strategy of renewable energy power grid-connecting.Design/methodology/approachConsidering the dual-uncertainty of renewable energy power output and electricity market demand, the authors construct different decision-making models of wholesale price contract and revenue-sharing contract to compare and optimize grid-connecting pricing, respectively, to maximize the profits of different participants in the hybrid power supply chain. Besides, the authors set different parameters in the models to explore the influence of competition intensity, government subsidies, etc. on power pricing. Then, a numerical simulation is carried out, they verify the existence of the equilibrium solutions satisfying the supply chain coordination, compare the differences of pricing contracts and further analyze the variation characteristics of optimal contract parameters and their interaction relations.FindingsRevenue-sharing contract can increase the quantity of green power grid-connection and realize benefits Pareto improvement of all parties in hybrid power supply chain. The competition intensity both of power supply and demand market will have an impact on the sharing ratio, and the increase of competition intensity results in a reduction of power supply chain coordination pressure. The power contract price, spot price and selling price have all been reduced with the increase of the sharing ratio, and the price of renewable power is more sensitive to the ratio change. The sharing ratio shows a downward trend with the increase of government green power subsidies.Originality/valueOn the basis of expanding the definition of hybrid power market and the theory of newsvendor model, considering the dual-uncertainty of green power generation output and electricity market demand, this paper builds and compares different contract decision-making models to study the grid-connection pricing strategy of renewable energy power. And as an extension of supply chain structure types and management, the authors build a “many-to-many” power supply chain structure model and analyze the impact of competition intensity among power enterprises and the government subsidy on the power grid-connecting pricing.

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