Integrated Intelligent Energy

Study on optimized operation on integrated energy system in parks with high permeability and carbon emission constraints

YIN Shuo, GUO Xingwu, YAN Jing, YANG Qinchen, ZHANG Peng

2021, 43(4): 1-7. doi:10.3969/j.issn.1674-1951.2021.04.001

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Realization carbon peak by 2030 is an urgent and tangible issue for China. Integrated energy systems for parks can coordinate different energy resources and give full play to the advantages of these resources through energy conversion and distribution. Establishing an efficient integrated energy system can promote the allocation and consumption of clean energy. Fully considering the park-oriented optimized control logical framework and functions of power storage systems, through carbon source analysis and the emission accounting,economy and carbon emission constraints were taken as the objective functions,and a multi-time-scale optimization model taking various loads' supply-demand balance and limiting conditions of coupled equipment as constraints was built. Calculation and analysis were made based on the model. The results show that the integrated power storage system can lower the operation costs of the whole energy system, increase the energy utilization, alleviate the randomness and volatility of renewable energy and load, and provide support for the optimized operation of park-oriented integrated energy systems with high permeability and carbon emission constraints.

Research and development of integrated community energy simulation-optimization system

SUN Hao, FU Jinzhou, YAN Xiaohu, HE Guoxin, CHEN Yonghua

2021, 43(4): 8-13. doi:10.3969/j.issn.1674-1951.2021.04.002

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According to the research on simulation optimization technology applied in regional integrated energy operation,a technical framework built on this technology and a regional integrated energy simulation optimization system are proposed.Under a unified platform architecture,the modeling, simulation and optimization scheduling for regional multiple energy flows are realized.According to the idea of trinary-level energy cascade utilization,models in different fields are built under the unified architecture,and the simulation system is developed.Taking CPLEX to solve the optimized model,output curve and objective function values of each equipment during the optimization can be obtained.This simulation system can be applied in regional integrated energy,to achieve the communication between energy flows and information flows and acquire the optimal scheduling strategy.

Research on economic dispatch of multi-energy complementary system based on Particle Swarm Optimization

ZHAO Xin, ZHENG Wenyu, HOU Zhihua, CHEN Heng, XU Gang

2021, 43(4): 14-20. doi:10.3969/j.issn.1674-1951.2021.04.003

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Giving full play to the advantage of synergetic utilization on energy, multi-energy complementary systems can realize the cascade utilization of energy, and ensure the safe, low-carbon, stable, efficient and economic operation of power system. According to the characteristics of energy flow in the system, electric bus, hot water bus, cold water bus, flue gas bus and steam bus are selected as the basic framework of the system. The models of each device in the system is set up independently. Based on this structure, a mixed-integer linear programming model for the system's daily dynamic economic dispatch is established. The operation cost of this model can be adjusted by an intelligent algorithm, Particle Swarm Optimization （PSO）, and the operating mode of equipment with the lowest operating cost can be obtained. Taking a hospital as a testing example, the test results confirm the effectiveness of the model and the advantages of the multi-energy complementary system in making full use of renewable energy and economy.

Research on the key issues in energy efficiency evaluation and improvement of offshore micro-integrated energy systems

XU Shihua, LIU Ping, QIU Rui, OUYANG Jun, KONG Fanxu, XU Bin, ZHANG Junbo, WU Jun, HAN Rui

2021, 43(4): 21-27. doi:10.3969/j.issn.1674-1951.2021.04.004

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At present,the worldwide energy crisis is increasingly intractable.Energy is the key factor restricting the development of every country.Oceans occupies vast area and are of rich and diverse resources,which provide a breakthrough for solving the energy crisis.Offshore oil attracts more attention as onshore oil is drying up.The offshore oil and gas platform is the key to offshore oil utilization.For lack of research on the specific integrated energy system,it is an urgent issue to make the platform run efficiently.Focusing on the integrated energy management technology of offshore oil and gas platforms,the energy consumption characteristics and load forecasting methods of the platform are summed up.Then a comprehensive energy consumption modelling method for the system interconnected multiple offshore platforms is put forward.Energy efficiency evaluation index and method for offshore oil platforms can quantify the efficiency of the platform.Combining the technologies that can improve the energy efficiency of the platform with the proposed evaluation methods,the research provides new concept for improving the energy efficiency of offshore oil platforms in China.

Integrated energy service strategy with participation of power generation enterprises from the perspective of value chain

QIAN Guoming, DING Quan, HUANG Chao, ZHAO Guotao

2021, 43(4): 28-33. doi:10.3969/j.issn.1674-1951.2021.04.005

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Integrated energy service is an important new market for current energy enterprises.Focusing on how traditional power generation enterprises participate in the integrated energy service business,the characteristics of their value chain are analyzed and summarized based on Michael Porter's value chain model.Considering the core value of integrated energy service and its development,the enterprises' strategies for developing integrated energy service business are studied,in order to improve its entire value chain.A guidance that the enterprises can gradually expand from their competitive business of energy production to the sales and customer-end service in the value chain is put forward,and specific development suggestions are proposed.The strategy provide reference for power generation enterprises in formulating their development strategy for integrated energy service.

Design of integrated energy system for parks based on complementation of cold, heat and electricity

ZHU Haidong, HAO Hao, ZHENG Jian, ZHANG Tingyu, CHEN Zhikai, HU Enjun

2021, 43(4): 34-38. doi:10.3969/j.issn.1674-1951.2021.04.006

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The analysis on the development of integrated energy at home and abroad shows that traditional mode of running cold,heat,electricity and other energy systems independently cannot achieve the optimizing and coordinating operation.Taking an industrial park as the example,an integrated energy information comprehensive solution based on the of cold,heat and electricity is proposed.Taking the actual situation of the park into consideration,a set of integrated energy system is established for the users of the park,as well as the government,to meet their demand for cold,heat and electricity.The overall architecture,data access,data flow and platform functions of the system were described in detail.This system realizes the interaction of energy flow,information flow and value flow.

Research on the role of small reactors in integrated energy systems

ZHOU Tao, ZHANG Hailong, LIU Wenbin

2021, 43(4): 39-46. doi:10.3969/j.issn.1674-1951.2021.04.007

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Currently, there is lack of clean and efficient heat sources in northern cities of China.Small reactor can take the pivotal role in an nuclear-wind-photovoltaic integrated energy system for its stability and reliability. This system has small initial investment, low site-selection cost, wide distribution area, short construction period, flexible function selection, strong adaptability, passive safety and so on. Artificial Intelligence network and big data can be used to optimize the system planning. Taking active modeling, simulation and experimentation, and combining active safty with passive safty, the coupling and safety of the system can be ensured.The system comprehensively utilizes electricity, gas, heat, and cold energy ,and its performance can be evaluated from the technology, social and economic benefits of the integrated energy system.With continuous innovation of technologies,taking advantages of distributed energy, a more flexible and interconnected integrated energy system can be built to facilitate the carbon neutrality.

Deviation assessment and control method for electricity sales companies based on short-term load bundling forecast

HU Qian, SUN Zhida, JIANG Keteng, LEI Yi, LI Haibo

2021, 43(4): 47-55. doi:10.3969/j.issn.1674-1951.2021.04.008

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Assessment on electricity deviation is a crucial transitional link in the electric market reform. For lack of scientific and effective load forecasting analysis on electricity deviation assessment, some power sales companies are of low assessment accuracy. In view of the above situation, a load forecasting method based on the load bundling forecasting and BP neural network model is proposed. The influence of load forecasting on the accuracy of deviation assessment is analyzed. Ten power sales companies in Chongqing executed forecast on their bundled load based on their customers' power consumption data. According to the calculated results of the deviation assessment, this method can alleviate the deviated electricity in the assessment of power sales companies.

Research on key technologies for integrated demand response based on edge IoT agent

LI Bin, YANG Fan, ZHAO Yanling, QI Bing, SHI Kun

2021, 43(4): 56-62. doi:10.3969/j.issn.1674-1951.2021.04.009

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Integrated demand response（IDR） is an important way for users of energy internet to participate in the interaction between power grid supply side and demand side.IDR can fully mobilize all kinds of resources at users' end,improve the comprehensive utilization efficiency of energy,reduce energy costs,consume more renewable energy,and promote energy trading and security protection.The edge IoT agent is the core equipment for data collection and security control on IoT perception layer,which can improve the automatic monitoring and intelligent operation and maintenance of a station.Integrating the auxiliary platform with visualization platform,the management,visualization and control on all the basic devices of the station can be realized.In a proposed solution that combines edge IoT agent with IDR,the application of the former in the latter business is analyzed.The edge IoT agent integrated distributed ledger,local computing based on IDR business logic,unified information exchange model of heterogeneous energy system and edge-side security protection of IDR business are studied.Finally,the prospect of edge IoT agent application in IDR business is presented.

Research on a PV-energy storage system with integration of grid-connection and disconnection modes based on low-pressure DC distribution network

LIU Jindou, CHENG Jie, YU Gaowei

2021, 43(4): 63-70. doi:10.3969/j.issn.1674-1951.2021.04.010

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In order to keep the stability of the inverters connected to a weak grid,a PV-energy storage system with integration of grid-connection and disconnection modes based on low-voltage DC distribution network is proposed.The system includes PV modules,common DC bus,energy storage system,low-voltage DC distribution network,AC/DC loads and multiple power converters.According to the three-level energy management strategy for PV generation,energy storage and distribution network,different power converter control strategies were taken.The system has four working modes：isolated operation with PV power generation,grid-connected operation with PV power generation,isolated operation with battery power supply,grid-connected operation with grid power supply.Each working condition was simulated in Matlab/Simulink.The results verify the correctness of the proposed system,which provides a theoretical reference for the practical application of the PV-energy storage system with integration of grid-connection and disconnection modes based on low-voltage DC distribution network.

Study on incentive mechanism of renewable energy consumption based on blockchain

ZHAO Guotao, QIAN Guoming, DING Quan, HUANG Chao

2021, 43(4): 71-77. doi:10.3969/j.issn.1674-1951.2021.04.011

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The proposal of carbon neutrality bring in opportunity for the development of renewable energy and looming challenge for renewable energy consumption.As most of studies focus on the policies and technologies,there is a lack of positive incentive mechanism of market.Based on smart contract,Proof of Work and Proof of Stake mechanisms of blockchain technology,and taking the blockchain energy trading platform as the carrier,energy carbon token adopting carbon reduction as its core concept is created based on the linkage mechanism of multiple markets.Its incentive effect on the market players in the process of renewable energy consumption is analyzed,which is beneficial for constructing new business model under this incentive mechanism in the future.

Business analysis on power generation enterprises in the field of charging pile under the new circumstances

ZHENG Jian, HAO Hao, ZHU Haidong, LI Wei, TANG Xu, LIU Sijun

2021, 43(4): 78-82. doi:10.3969/j.issn.1674-1951.2021.04.012

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Under the national strategic guidance of new infrastructure construction,charging piles for electric vehicles have ushered in new development opportunities.Starting from the upstream and downstream industrial chains and business modes,the development status of the charging pile industry is analyzed.Based on the operation mode from the upstream to the downstream of the charging pile industry,the current problem of excessive investment, lack of profitability,insufficient number and uneven distribution and the prospect of this industry were analyzed.The necessity of charging piles is analyzed from their roles in assisting power generation enterprises to weasel out of the predicament and their access to market.The business analysis provides directional guidance for power generation enterprises to deploy the charging pile market.

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