Study on steady-state power flow optimization of cold-heat-electricity integrated energy system

2020 ◽  
Author(s):  
Bin Oyang ◽  
Lu Qu ◽  
Zhichang Yuan ◽  
Chao Lu ◽  
Peiqian Guo ◽  
...  
Keyword(s):  
Steady State ◽  
Power Flow ◽  
State Power ◽  
Energy System ◽  
Flow Optimization ◽  
Integrated Energy System

scholarly journals Steady-State Power Flow Analysis of Cold-Thermal-Electric Integrated Energy System Based on Unified Power Flow Model

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4455
Author(s):  
Qu ◽  
Ouyang ◽  
Yuan ◽  
Zeng
Keyword(s):  
Steady State ◽  
Water Supply ◽  
Power Flow ◽  
Flow Model ◽  
Flow Analysis ◽  
State Power ◽  
Energy System ◽  
Optimal Operation ◽  
Tight Coupling ◽  
Integrated Energy System

The integrated energy system includes various energy forms, complex operation modes and tight coupling links, which bring challenges to its steady-state modeling and steady-state power flow calculation. In order to study the steady-state characteristics of the integrated energy system, the topological structure of the cold-thermal-electric integrated energy system is given firstly. Then, the steady-state model of the power subsystem, the thermal subsystem, the cold subsystem and the distributed energy station are established, the unified power flow model is established, and the Newton Raphson algorithm is used to solve the unified power flow model. Finally, the influence of the key technical parameters on the steady-state power flow of the integrated energy system is analyzed. Research results show that the photovoltaic power generation plays a supporting role in the voltage of each bus; with the increase of electric load power, the unit value of bus voltage decreases continuously; the water supply temperature of the source node has a greater impact on the steady-state flow in the pipeline and the water supply temperature of each node; the pipeline length of the heat network has a greater impact on the end temperature of the pipeline, the water supply temperature, and the return water temperature of each node. The analysis results can support the planning, design, and optimal operation of the integrated energy system.

Power Flow Optimization for an Offshore Multi-energy System

2019 ◽  
Vol 93 (sp1) ◽  
pp. 585
Author(s):  
Bo Qu ◽  
Ming Zhong ◽  
Hongjie Jia ◽  
Huaguang Yan ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Power Flow ◽  
Energy System ◽  
Flow Optimization

scholarly journals Analysis of Unified Power Flow Controller Steady-State Power Flow Regulation Capability and Its Key Factors

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4419
Author(s):  
Jian Yang ◽  
Zheng Xu ◽  
Zheren Zhang
Keyword(s):  
Steady State ◽  
Power Flow ◽  
Estimation Method ◽  
State Power ◽  
Flow Regulation ◽  
Unified Power Flow Controller ◽  
Key Factors ◽  
Systems Research ◽  
Flow Controller ◽  
Power Flow Controller

As the latest generation of flexible AC transmission system (FACTS) devices, the unified power flow controller (UPFC) has comprehensive control capability and has played an important role in modern power systems. Research on UPFC steady-state power flow regulation capability is valuable for the design and operation of UPFC projects. To analyze the UPFC regulation capability, in this paper, the interaction between the UPFC and the external system is studied and the key factors of UPFC regulation capability are analyzed. It is demonstrated that the changes in the voltage magnitude and phase angle difference of UPFC-embedded line terminals will hinder the UPFC from regulating the power flow and decrease the UPFC regulation capability. Therefore, the UPFC power flow regulation capability is not only related to the parameters of the UPFC and its installation line, but also related to grid parameters. To analyze the UPFC active power flow regulation capability in practical power grids, the relationship between the UPFC regulation capability and grid parameters is deduced, and an estimation method is proposed to calculate the regulation range. Then, the estimation method is applied in the Chuxiong Power Grid and compared with power flow calculations. The results verify the UPFC power flow regulation characteristics given by the analysis and the effectiveness of the estimation method. Besides, it is shown that the estimation method can lower the requirements for the power flow calculation program, and reduce computation load.

An Integrated Energy System With Large-Scale Electrical and Thermal Energy Storage Devices

2017 ◽  
Author(s):  
Tian Zhao ◽  
Qun Chen
Keyword(s):  
Power Flow ◽  
Power Plants ◽  
Large Scale ◽  
Thermal Power ◽  
Operation Time ◽  
Energy System ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Integrated Energy System ◽  
Typical Day

In this contribution we introduced an integrated energy system consists of thermal power plants, combined heat-power (CHP) plants and wind power plants, and aimed to supply electricity and heat to users simultaneously. A large-scale battery, a TES device and heat transfer devices are included also. During the operation time of the battery, the TES device stores the generated heat and meanwhile supplies heat to users. Applying the power flow method, the electro-thermal analogy and the entransy dissipation-based thermal resistance method, we constructed the power flow model of the system. Besides, we optimized the system aimed to minimize wind curtailments. Optimization results presented for a typical day the system reduces wind curtailment percentage from 40.63 % to 13.70 % and supply 5% heat load. Besides, the operation strategy of the battery is to charge at night and discharge in the day.

Sign in / Sign up

Export Citation Format

Share Document