scholarly journals Optimal dispatching of integrated energy system considering flexible load

2021 ◽  
Vol 2076 (1) ◽  
pp. 012014
Author(s):  
Jinrui Guo ◽  
Zhijun Zhang ◽  
Lei Xu ◽  
Hao Wang ◽  
Hui Wang ◽  
...  
Keyword(s):  
Energy System ◽  
Optimal Scheduling ◽  
Scheduling Model ◽  
Alternating Direction ◽  
Proposed Model ◽  
Integrated Energy System ◽  
Flexible Loads ◽  
The Stability ◽  
The Mathematical Model ◽  
Protection Costs

Abstract Demand response, as an effective dispatching method, has been widely used in the optimization research of integrated energy system (IES). In this article, first, the mathematical model of flexible loads including shiftable electric, heat, and cooling load are established in line with their characteristics. Second, an optimal scheduling model of the IES is built, where the minimum sum of system operation and maintenance and the environmental protection costs comprise the objective function. Furthermore, the alternating direction multiplier method is used to solve the optimal scheduling model in a fully distributed manner. Finally, simulation results show that the proposed model and algorithm can efficiently solve the IES optimal dispatching problem, reduce the peak-valley difference, and improve the stability of the system.

scholarly journals Coordinated Flexibility Scheduling for Urban Integrated Heat and Power Systems by Considering the Temperature Dynamics of Heating Network

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3273
Author(s):  
Wei Wei ◽  
Yaping Shi ◽  
Kai Hou ◽  
Lei Guo ◽  
Linyu Wang ◽  
...  
Keyword(s):  
Power Systems ◽  
Dynamic Characteristics ◽  
Energy System ◽  
Typical Structure ◽  
Assessment Index ◽  
Scheduling Model ◽  
Proposed Model ◽  
Integrated Energy System ◽  
Urban Heat ◽  
Random Fluctuations

The coordinated heat-electricity dispatch of the urban integrated energy system (UIES) helps to improve the system flexibility, thereby overcoming the adverse effects caused by the random fluctuations of renewable energy (RE) and promoting the penetration of RE. Among them, the dynamic characteristics of the urban heat network (UHN) are important features that need to be considered for the operating scheduling of the UIES. This paper aims to establish a flexibility scheduling model for UIES based on the dynamic characteristics of the UHN. First, the typical structure and key equipment model of the urban integrated heat and power system (UIHPS) with the dynamic characteristics of the UHN is proposed. Then, the definition and model of the UIHPS flexibility and the assessment index of the flexibility are developed. Moreover, a flexibility scheduling model for a UIHPS that considers the dynamic characteristics of a UHN is established. Finally, the validity of the proposed model is validated by case studies, and the applicability of flexibility scheduling and the effect of heat load (HL) are analyzed.

scholarly journals Low-Carbon Economical Dispacth of Electricity-Heat Integrated Energy System Considering Concentrating Solar Power and Heat Loss in Heat Pipe Network

2020 ◽  
Author(s):  
Nenghan Zhang ◽  
Yufeng Wang ◽  
Xiyan Jian ◽  
Yibo Ding
Keyword(s):  
Heat Loss ◽  
Solar Power ◽  
Energy Coupling ◽  
Energy System ◽  
Optimal Scheduling ◽  
Low Carbon ◽  
Concentrating Solar Power ◽  
Scheduling Model ◽  
Integrated Energy System ◽  
Operation Cost

With the development of energy internet, integrated energy system can effectively reduce carbon emissions and improve the utilization of renewable energy. In this paper, a low-carbon optimal scheduling model of integrated energy system considering heat loss of heat network pipeline is proposed. Based on the study of concentrating solar power (CSP) plant and heat storage tank (HS), an optimal scheduling model is established, which takes system operation cost, environmental pollution and penalty cost of abandoning wind and solar energy as objectives. Through the analysis of example results, it is proved that the model proposed in this paper can achieve the goal of reliable, low-carbon and economic operation of the system. At the same time, it shows that CSP unit can reduce the operation cost of system and increase energy coupling and utilization.

scholarly journals Day-Ahead and Intra-Day Optimal Scheduling of Integrated Energy System Considering Uncertainty of Source & Load Power Forecasting

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2539
Author(s):  
Zhengjie Li ◽  
Zhisheng Zhang
Keyword(s):  
Wind Power ◽  
Demand Response ◽  
Solar Power ◽  
Load Forecasting ◽  
Energy System ◽  
Optimal Scheduling ◽  
Scheduling Scheme ◽  
Load Power ◽  
Integrated Energy System ◽  
Operation Cost

At present, due to the errors of wind power, solar power and various types of load forecasting, the optimal scheduling results of the integrated energy system (IES) will be inaccurate, which will affect the economic and reliable operation of the integrated energy system. In order to solve this problem, a day-ahead and intra-day optimal scheduling model of integrated energy system considering forecasting uncertainty is proposed in this paper, which takes the minimum operation cost of the system as the target, and different processing strategies are adopted for the model. In the day-ahead time scale, according to day-ahead load forecasting, an integrated demand response (IDR) strategy is formulated to adjust the load curve, and an optimal scheduling scheme is obtained. In the intra-day time scale, the predicted value of wind power, solar power and load power are represented by fuzzy parameters to participate in the optimal scheduling of the system, and the output of units is adjusted based on the day-ahead scheduling scheme according to the day-ahead forecasting results. The simulation of specific examples shows that the integrated demand response can effectively adjust the load demand and improve the economy and reliability of the system operation. At the same time, the operation cost of the system is related to the reliability of the accurate prediction of wind power, solar power and load power. Through this model, the optimal scheduling scheme can be determined under an acceptable prediction accuracy and confidence level.

A nonlinear model-based dynamic optimal scheduling of a grid-connected integrated energy system

Energy ◽  
2022 ◽  
pp. 123115
Author(s):  
Fang Liu ◽  
Qiu Mo ◽  
Yongwen Yang ◽  
Pai Li ◽  
Shuai Wang ◽  
...  
Keyword(s):  
Nonlinear Model ◽  
Energy System ◽  
Optimal Scheduling ◽  
Model Based ◽  
Integrated Energy System
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