Integrated Intelligent Energy

Integrated energy service and cooperation modes

HAN Feng1，ZHANG Yanguo2，YAN Jiaoping1，CONG Kunlin2

2019, 41(11): 1-4.

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The business model and cooperation model of integrated energy services are flexible and diverse, with broad development space and market prospects，and it is the main business mode for energy and power enterprises in the future. Four integrated energy service modes, five integrated energy service cooperation modes and corresponding cases were introduced.An integrated energy service case of combined cooling, heating and power(CCHP)system using biomass proves that integrated energy service can realize the cascade utilization of energy，which can improve the comprehensive utilization efficiency of energy. 

Research on integrated energy service in lean marketing of power

YANG Sheng1，WANG Haomiao2，CAI Siyuan3，GONG Gangjun1，WEN Yafeng1

2019, 41(11): 5-8.

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The new marketing model that turning power companies from pure and exclusive energy suppliers to integrated energy service providers is the ultimate goal for state grid companies, which requires research on integrated energy service model for lean marketing of power. By analyzing the integrated energy service model, the types of lean services in ubiquitous power Internet of Things are explored, and the development process of the power marketing model is introduced.Finally, a new marketing model supported by integrated energy service is proposed, which provides a reference for further integrated energy service study.

Natural gas development review and trend analysis in China

DIAO Peibin，WANG Yufan

2019, 41(11): 9-11.

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As a kind highquality and efficient green energy, natural gas has greatly alleviated the worldwide energy crisis and plays an extremely important role in the economic development. It not only promotes the social development and improves the quality of our lives, but also protects the atmosphere. The proportion of natural gas in domestic energy structure is gradually increasing.Domestic market status, consumption ,dependence on foreign trade, pricing reform of nature gas are introduced in detail. Based on the data and policy analysis, forecasts on natural gas supply and demand relationship in China for the next few years are made to meet the challenge and opportunity of domestic nature gas market.

Analysis on several capacity support mechanisms in electric market based on reliability index

GUO Le，ZHANG Dandan

2019, 41(11): 12-17.

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The electricity market based on marginal cost clearing mechanism cannot recover the fixed cost of generating units.Then reducing the revenue of generating enterprises is not conducive to investment, which is harmful to generation capacity adequacy and will lead to the decline in power system reliability.Three solutions to this problem from foreign electricity market are introduced which are scarce price mechanism, strategic readiness and capacity market.Their advantages and disadvantages are analyzed.Finally,according to the current situation of China’s electricity market，a proposal for capacity market is put forward.

Status and future trends of integrated energy services in Bangladesh and Southeast Asian countries

CHEN Wei

2019, 41(11): 18-21.

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With the restrictions on thermal power before 2030 in China and developed countries of Europe and America , many domestic enterprises have invested in overseas energy projects including fuel, thermal power, new energy, and power grids in a buildoperatetransfer (BOT) mode. By analyzing the power supply characteristics, electricity structural planning, energy utilization efficiency, and power fiscal revenue of Bangladesh and Southeast Asian countries, the necessity of providing integrated energy services in these countries is pointed out, and the development trend in the next few decades is looked into,which provides concept for domestic BOT enterprises in of integrated energy services market development and planning.

Research on integrated energy technical route

YANG Xiaosi1，TAO Xinlei2

2019, 41(11): 22-25.

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As the transformation and upgrading of global energy consumption,the energy supply modes of energy enterprises are more flexible and diverse.Under the increasing pressure of global climate warming,energy conservation and emission reduction, improving the energy utilization efficiency, and the proportion of renewable and clean energy in power supply system has become the top priority. In order to meet these challenges, the energy industry has proposed an integrated energy system that combines new energy with traditional energy.By introducing technical routes of integrated energy systems and successful cases in different countries, the progress in energy industry of these countries is summarized. The existing problems in technical routes of some domestic enterprises are listed. Reasonable suggestions for developing domestic integrated energy system are proposed based on comparison of domestic and international technical routes.

Advance in study on CCHP distributed energy system

SUN Siyu1，YU Chengqi2，SUN Tao3，LI Xinjian3，WEI Yi4，TAN Jingbo2，ZHANG Juntao2

2019, 41(11): 26-31.

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Combined cooling, heating and power (CCHP) system is an important branch of distributed energy system. It gains much attention for the significant advantages in energy utilization and environmental protection. CCHP is in starting stage,so the economic benefits, environmental benefits, and operation optimization are important for the promotion and application of the system. The main research objects of CCHP system in recent years are classified and discussed, and the research achievements in economic analysis, renewable energy, system optimization made by domestic and foreign scholars are presented in detail.The current status of the study is clarified, and the existing problems in this field are pointed out, which provides reference for research directions in future.

Current status and suggestions on biomasscoal coupled power generation technology

WANG Jianli，ZHANG Jinzhu，JI Jinfang，LIANG Xinlei，SHANG Yongqiang，LIU Yawei

2019, 41(11): 32-35.

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In order to rationally and effectively utilize various biomass and solid waste resources in China, biomasscoal coupled power generation is proposed. However, due to the high investment and lack of subsidy policy for electricity price, the promotion is very difficult. Matching the production of various biomass and solid wastes up with the conventional operational parameters of thermal power units, and comparing the investment of biomasscoal coupled power generation projects with conventional biomassfired projects, a reasonable solution is proposed. It is suggested that municipal sludge can be directly blended and burned, which is economical and convenient.The biomass burning system with circulating fluidized bed boiler is simple and moneysaving in blending and combustion.The biomass burning system with pulverized coal boiler is complex and moneyconsuming,which can be improved by biomass gasification and byproducts making.General industrial solid waste from cities can be blended and burned in circulating fluidized bed boilers, but the impact on environment needs to be analyzed.

Clean coal heatsupply and integrated energy utilization

XU Jingjing，KANG Hui，ZHANG Ruihan

2019, 41(11): 36-39.

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Clean coal heatsupply is an important branch of integrated energy services.It is characterized by stable user demand, stable market, mature and reliable technology and policy support. It is the main business of Huadian Group. To improve the heating capacity of coalfired power plants，discussion on characteristics of heating industry in China and the political positioning of clean coal was made from the perspective of policy and technology. And considering the researching achievement of Tsinghua University, six measures to expand the heating capacity of existing coalfired power plants and the related problems were proposed.

Predictive maintenance of power plant equipment driven by “cloud+client” big data

WANG Jiazi1，WANG Guiling2

2019, 41(11): 40-45.

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Guarantee for the stability of power plant equipment is very important for power generation enterprises. An architecture of a predictive maintenance system for power plant equipment is proposed,which can collect, process and computing data on the client side,and aggregate, store, batch process and realtime process data on the cloud side. The key technologies of writing, parallel processing of massive sensor data, and predictive maintenance for the system based on HBase cloud database were analyzed.The architecture not only saved frontend resources, but also showed the potential value of the massive sensor data. Through predicting fault based on massive sensor data, the maintenance on the equipment could be done timely according to actual situations, which helped personnel in decisionmaking and making countermeasures in advance.Preventing and controlling the potential fault will ensure the reliability and stability of power plants.

Effects of ambient temperature and load ratio on performance of gassteam combined cycle cogeneration units

ZU Hang，WANG Qiuying

2019, 41(11): 49-52.

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The output and heat consumption of the gassteam combined cycle cogeneration units are affected by ambient temperature and operating parameters. To have a better understanding on the thermodynamic property of cogeneration units, and provide a sound theoretical and data basis for the optimized operation, taking a GE 6F gas turbine as the research object, effects of ambient temperature and load ratio on the performance of gas turbines are analyzed.The study results show that with the increase of ambient temperature, the power output and efficiency of gas turbine decreases greatly, and so does the combined cycle output. At full load, due to the influence of bottom cycle,there is an optimum ambient temperature for maximized combined cycle efficiency. The fluctuation of gas turbine load ratio will impact the peak load regulating capacity of cogeneration units.With the increase of heat supply, the combined cycle power output shows a linear decrease and a critical heating value, which means load ratio of gas turbine anticorrelated with the efficiency of combined cycle.

Design and application of intelligent auxiliary debugging system for largescale energy storage power station

ZHAO Long,YUE Yibo

2019, 41(11): 53-56.

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The number of information measuring points of a largescale energy storage power station is more than one million, and the traditional manual checking method for counteringpoint joint debugging is timeconsuming. An intelligent auxiliary debugging system is proposed to realize automatic counteringpoint process for the equipment in the whole plant. SCD model files of the whole plant are imported into the the auxiliary debugging system by intelligent electronic device(IED)simulation tool, and message is sent to the monitoring background and the telecontrol device. The monitoring background receives , parses and compares the message and forms a recording file.The telecontrol device receives the message and forwards it to the control center who parses the massage and forms a recording file as well. Finally, the intelligent auxiliary debugging system will compare the consistency of the recorded files, and issue a debugging report. Engineering practice shows that the system can greatly reduce the workload of personnel in debugging and shorten the time of project construction.

Study of aeroderivative gas turbines applied in industrial park integrated energy systems

CHEN Xiangyang，SHI Wei

2019, 41(11): 57-61.

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To analyze the operation requirements of industrial park integrated energy system, the characteristic of aeroderivative gas turbine are introduced which are high efficiency, quick startup,simple adjustment,etc.The requirements of integrated energy system on each section in“sourcenetworkloadstorage” are explained, and feasibility of applying aeroderivative gas turbine in industrial park is discussed. Aeroderivative gas turbine is the core equipment for natural gas distribution energy station on power supplying side.It can provide multiple energy and complement renewable energy.As for the grid side,aeroderivative gas turbine can provide excellent auxiliary services for the regional power grid,which ensures its stable and economical operation.On power storage side, aeroderivative gas turbine integrated with batteries and hydrogen energy can also make up a unique hybrid system.

Exploration on utilization models for renewable energy of SichuanTibet section in the Jinsha River upper reaches

HU Guiliang

2019, 41(11): 62-65.

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Generating capacities of wind power and solar energy are affected by their conditions. Therefore, their outputs are highly unstable, intermittent and random. Largescaled gridconnecting of wind power and solar energy may cause considerable impact on the safety, stability and economic operation of the power grid. It is found out that hydropower, wind power and solar energy are complementary to each others by characteristic analysis. There is abundant hydropower ,wind power and solar energy of SichuanTibet section in the Jinsha River upper reaches, so it is possible to build a hydrowindsolar complementary renewable energy station since hydropower is of great regulating capacity. Utilization models of the renewable energy was explored based on cascade hydropower system of SichuanTibet section in the Jinsha River upper reaches. The coordinated development concept of the hydrowindsolar complementary system proposed can provide reference for the similar projects in other areas.

Water investment and integrated energy coupling utilization and development

HAN Mailiang

2019, 41(11): 66-69.

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At present, environment and energy issues have got worldwide attention.While facing severe energy crisis and environmental pollution, we need to diversify the ways of energy utilization.Concerning the development direction of the whole water investment industry, the current situation of energy consumption in sewage treatment plants was analyzed, and specific countermeasures were put forward, such as fully tapping the renewable energy in sewage treatment plants, recovering and utilizing the heat and biomass of municipal sewage effectivly. Distributed photovoltaic power generation system and water source heat pump were installed.And sludge disposal and burning contributed to heating and electricity supply, which realized the energy saving,environment protection and effective utilization of integrated energy.

Practice of centralizing and intelligent transformation on heating supply of thermal power enterprises

REN Xinsheng

2019, 41(11): 70-75.

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Wangting Power Generation Company (hereinafter referred to as Wangdian company)has successively carried out the first, second and third phase transformation to meet the increasing heating demand in major area of Wuxi and Suzhou.During the transformation, the heat supply dispatching was scattered and lacking of unified dispatching command. With the rise of the concept of “intelligent heating”, Wangdian company setup a centralizing and intelligent transformation on heating supply which integrated the decentralized heating control on unit side, and built a heating load dispatching center that was capable of centralizing control. The network automatic adjustment on heating supply side was realized by connecting the data from terminal users to that from supply side. The transformation was of leading and demonstration significance for domestic heating industry. Considering the complex operation mode of the whole power plant, the performance analysis model of the heating system was established and the steam extraction cost for heating supply was calculated online by realtime data analysis and processing. Coordinated control made by timesharing controlled multiple regulating circuits on a single targeted parameter realized closedloop optimization control on heating accurately,which represents a control concept of simplicity and intelligence.

Design and optimization of solar energy storage and charging in integrated energy systems

LI Yanhong, WANG Xingxing

2019, 41(11): 76-79.

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With the technological revolution and industry transformation, integrated energy service will be the trend of energy industry. With the growth of electric vehicles annual sales, the demand for charging piles is increasing. Taking a integrated energy system in Fengtai District as the research object, the optimal designs for photovoltaic power generation, energy storage, fast/slow charging piles and energy management system were analyzed. Based on the energy generated by photovoltaic system hourly, energy demanded by energy storage and charging piles, and energy prices, the energy management strategy was adjusted and the economic profits was maximized,which provides reference for solar energy storage and charging in integrated energy systems.

Reflect on intelligent construction of gasfired distributed energy stations

ZHOU Jinshun，JU Ming

2019, 41(11): 80-84.

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Because of the high integrated energy utilization efficiency, low energy transmission loss and environmental protection, gas distributed energy stations have been vigorously advocated by the government and power generation enterprises in recent years.However, limited by natural gas price, electricity price and other conditions, profitability of distributed energy stations is considerably low. The key to solve this problem is getting preferential policies of natural gas price and electricity price and taking technical methods for intelligent construction, which includes modern information technology,big data processing technology,IoT, automatic power plant startup and shutdown system(APS),integrated management and control platform,etc.Enterprise production automation, management digitization and scientific decision makingare based on intelligent construction. And integrated management and control platform contributes to the diversifiedenergy services forenergy users, increasing of energy utilization rate and improvement of enterprises profitability.To improve the competitiveness of distributed energy suppliers and their service level, a scheme of realizing intelligent construction of distributed energy station by scientific methods is proposed. Intelligent construction of distributed energy stations will promote the operational model innovation and sustainable development of energy enterprises.

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