The Coordination of Back-to-Back Starting and Protections for Pumped Storage Units

2012 ◽  
Author(s):  
Shiwu Xiao ◽  
Jianhui Liu ◽  
Xiaojuan Kang
Keyword(s):  
Pumped Storage ◽  
Storage Units

Optimal planning and sensitivity analysis of green microgrid using various types of storage systems

2020 ◽  
pp. 0309524X2094147
Author(s):  
Sumit Sharma ◽  
Yog Raj Sood
Keyword(s):  
Sensitivity Analysis ◽  
Renewable Energy ◽  
Storage Systems ◽  
Operating Cost ◽  
Indian Policy ◽  
Policy Interventions ◽  
Cost Of Energy ◽  
Pumped Storage ◽  
Test Scenarios ◽  
Storage Units

In this article, a green microgrid is suggested which utilizes renewable energy units such as wind, solar, hydro, and biomass in conjunction with energy storage systems like batteries and the pumped storage. Different test scenarios are investigated to optimally use the power generated from the combined usage of the renewable energy units and the storage units. To judge the performance, a comparative feasibility analysis of the proposed approach is carried out to demonstrate the potential findings based on the total net present cost, levelized cost of energy, operating cost, and initial capital cost. In addition, the proposed solution may be subject to various changes in systems configuration with regard to the wind speed, solar radiation, streamflow, and the electric load; therefore, sensitivity analysis is also presented. Moreover, Indian policy interventions are considered to demonstrate the effectiveness of the proposed approach for a reduction in the overall revenue of the system.

Unit Commitment for a Power System with Pumped Storage Units

1997 ◽  
Vol 30 (17) ◽  
pp. 545-550
Author(s):  
Michael P. Walsh ◽  
Mark J. O'Malley
Keyword(s):  
Power System ◽  
Unit Commitment ◽  
Pumped Storage ◽  
Storage Units

scholarly journals An Integrated Start-Up Method for Pumped Storage Units Based on a Novel Artificial Sheep Algorithm

Energies ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 151 ◽  
Author(s):  
Zanbin Wang ◽  
Chaoshun Li ◽  
Xinjie Lai ◽  
Nan Zhang ◽  
Yanhe Xu ◽  
...  
Keyword(s):  
Start Up ◽  
Pumped Storage ◽  
Storage Units

scholarly journals An adaptive under-frequency optimal control strategy for power system combined pumped storage and under-frequency load shedding

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0261093
Author(s):  
Wentao Huang ◽  
Jinman Yu ◽  
Zhijun Yuan ◽  
Zhongwei He ◽  
Jun He ◽  
...  
Keyword(s):  
Optimal Control ◽  
Control Strategy ◽  
Large Scale ◽  
Power Grid ◽  
Load Shedding ◽  
Mode Transition ◽  
Optimal Model ◽  
Optimal Control Strategy ◽  
Pumped Storage ◽  
Storage Units

With the construction and development of ultra-high voltage (UHV) power grids, large-scale, long-distance power transmission has become common. A failure of the connecting line between the sending-end power grid and the receiving-end power grid will cause a large-scale power shortage and a frequency drop in the receiving-end power grid, which can result in the frequency collapse. Presently, under-frequency load shedding (UFLS) is adopted for solving the frequency control problem in emergency under-frequency conditions, which can easily cause large load losses. In this context, a frequency coordination optimal control strategy is proposed, which combines the mode transition of pumped storage units with UFLS to deal with emergency under-frequency problems. First, a mathematical model of the frequency dynamic response is established, which combines the mode transition of pumped storage units with UFLS based on a single-machine equivalent model. Then, an optimal model of the minimal area of the power system’s operation frequency trajectory is introduced, yielding the optimal frequency trajectory, and is used for obtaining the action frequency of the joint control strategy. A simulated annealing algorithm based on the perturbation analysis is proposed for solving the optimal model, and the optimal action frequency is obtained that satisfies the transient frequency offset safety constraint of the power system. Thus, the joint optimal control of the mode transition of the pumped storage units and UFLS is realized. Finally, the EPRI-36 bus system and China’s actual power grid are considered, for demonstrating the efficiency of the proposed strategy.

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