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RSS2020 Vol. 7, No. S1
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2020, 7(S1): 1-7.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.001
Abstract:
[Introduction] To further implement the development strategy of China Southern Power Grid Corporation (SGCC) transforming into smart grid operator,energy industry value chain integrator and energy ecosystem service provider, further accelerate the construction of smart grid,and promote the full implementation of the smart grid development planning objectives of SGCC. Method Studied the experimental application effect of multi parameter sensor technology, such as switch cabinet partial discharge, transformer oil temperature,joint temperature,gas pressure,ambient temperature and humidity,smoke,water immersion and electrical remote signaling,studied the functional framework of intelligent gateway,edge Intelligent Computing and processing technology and application scenario,studied the technical requirements of deep integration design and interface standardization of primary and secondary equipment of distribution network. This paper studied the auxiliary decision-making technology of intelligent diagnosis and monitoring system of distribution network to meet the requirements of data access, data fusion, intelligent analysis, business collaboration,source end maintenance and data transmission in power system security zones for cross business requirements such as station end monitoring,operation and maintenance. Result After the pilot, summary and refinement of a large number of demonstration projects such as distribution room and platform area in the past two years, the company's standard design and typical cost version V3.0 (intelligent distribution) based on the integration of intelligent technology and operation and maintenance strategy were formulated, and a new system architecture based on the South Grid cloud platform was constructed to realize the real-time perception, interconnection, edge computing optimization and prediction of equipment and objects. Conclusion Unifying the relevant design standards of smart grid,comprehensively supporting the smart monitoring and monitoring technology scheme,fully adapting to the future development requirements of smart grid and digital grid, is of great significance for strengthening the smart inspection and maintenance, user side management, and further improving the construction and operation level of smart grid.
2020, 7(S1): 8-12.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.002
Abstract:
[Introduction] Shenzhen is a national strategic hub city of the Guangdong-Hong Kong-Macao Greater Bay Area and a pioneering demonstration zone of socialism with Chinese characteristics. In order to ensure the reliability of electricity production and life of the citizens, Shenzhen urgently needs to study measures to improve the grid's resistance to natural disasters such as typhoons, lightning and floods. Method Based on the successful experience of power system disaster prevention and mitigation, disaster reduction and relief as the research basis, the basic concepts, basic principles, and construction goals for strengthening local power grid disaster prevention, reduction, and relief were proposed. In addition, this article proposed key measures for building a strong local power grid from the aspects of planning, construction, operation, maintenance, and application of new technologies. Result Focusing on important users and building a strong power grid covering the main core areas of the city, this article further integrates the connection corridors for fast power recovery, and the main power transmission channels for disaster protection to form a strong local power grid. Conclusion The research results are conducive to Shenzhen's adaptation to the urban and grid development planning of the Guangdong-Hong Kong-Macao Greater Bay Area. And it is of great significance to the construction of power grids in other important cities and natural disaster-prone areas in China.
2020, 7(S1): 13-17.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.003
Abstract:
[Introduction] The smart grid is an important part of smart cities. With the construction of smart cities, the city's smart grid is ushered in a period of accelerated development. The existing urban smart grid planning pays more attention to the introduction of new technologies, and does not study in depth how to select new technologies and how to systematically apply them to smart grid construction. Method This paper attempted to construct a systematic planning method. By combing and summarizing the characteristics of smart grids in advanced cities at home and abroad, and combining the conditions of the target cities, we could find gaps and fill shortcomings, and formulate target cities' smart grid development targets according to local conditions. By comparing various aspects of power production and management, we proposed smart grid construction measures.This paper took Guangzhou Power Grid as the representative of large-scale urban power grid and analyzed the planning and construction of urban smart grid. Result Finally, through the improvement of a series of evaluation indicators, the effectiveness of smart grid construction was illustrated. Conclusion The large-scale urban smart grid planning method proposed in this paper is feasible and effective, and can provide guidance for the planning and construction of smart grids in other large cities.
2020, 7(S1): 18-23.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.004
Abstract:
[Introduction] The comprehensive benefits of smart grid projects are the key factors influencing the formulation of technical solutions and investment decisions. Therefore, this paper proposes a new method for quantitative assessment of comprehensive benefits based on improved QPA, aiming at the shortcomings of existing methods, including the narrow scope of application, failed in differentiate between stakeholders, and distinguishing between current realizable returns and long-term potential earnings. Methods By analyzing the asset composition of a smart grid project, the cost, functions and corresponding benefits of various types of smart grid assets and relevant parties were mapped in the proposed method, and benefits and costs in accordance with relevant parties and cashing cycles were classified. Ultimately, a cost-benefit analysis of a smart grid project was conducted in accordance with the internal operational mechanisms of sub-systems and overall projects and external market mechanisms. Results This method can be used to quantify more comprehensive and effective multi-scale smart grid projects. Conclusion Based on practical engineering examples, it is shown that the proposed method is accurate and effective, and provides method support for the decision-making of project investment operation mode and technical solution.
2020, 7(S1): 24-28.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.005
Abstract:
[Introduction] With the increase of the number of incremental distribution network projects and the diversification of investors, it is urgent to form a perfect distribution service pricing mechanism. Method In the new paper, the formation mechanism of the distribution service price of the incremental distribution network, the transmission price sharing mechanism of the provincial grid and the price sharing mechanism of the access to the public grid were analyzed, and the applicability, advantages and disadvantages of the benchmark price method, the bidding price method and the post pricing method were studied. Result In the aspect of the transmission price sharing of the provincial grid, the stamp method is compared And the advantages and disadvantages of the two methods of node electricity price, put forward targeted suggestions; in the access to public network price mechanism, put forward the corresponding relationship between price mechanism and asset interface division. Conclusion This paper studies the price formation mechanism of incremental distribution network, hoping to provide valuable reference for the reform and development of China's power system.
2020, 7(S1): 29-35.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.006
Abstract:
[Introduction] Economic and social development of Guizhou province is taking off. In order to fully meet the power demand, Guizhou power system needs to accelerate its development. Method Analysis of load characteristics was an important aspect of power market analysis. The load characteristics and changing trends was an important basis for power planning, production and operation. This paper analyzed the load characteristics of typical industries and users from the first, second and third industries of Guizhou industrial structure and the domestic electricity consumption of urban and rural residents. Result As a result, this paper demonstrates the annual and daily load curves of typical industries and users based on the analysis of statistical data. Their characteristics and trends are analyzed. Conclusion Due to the different characteristics of power consumption in different consumers, the annual load varies with months, and the peak time points of typical days in winter and summer show different rules.This work provides a solid foundation for load forecasting and even for the scientific and accurate planning of Guizhou power development.
2020, 7(S1): 36-41.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.007
Abstract:
[Introduction] In order to accurately understand the situation of load characteristics and grasp the change regularity of load, it is necessary to analyze the influence factors of the load characteristics of Guizhou power grid. Method Based on the data collected from the historical load, macro-economic, weather and temperature and so on, we first analyzed and summarized the change regularity of load characteristics of Guizhou power grid, and further analyzed the influencing factors of load characteristics from several aspects such as macro economy, large industrial users and temperature changes. Result The results showed that economic development level and industrial structure adjustment, large industrial users and temperature changes had a greater impact on the load characteristics of Guizhou power grid, while other factors, such as power demand side management and electricity price policy had a smaller impact on the Guizhou load characteristics. Conclusion According to the analysis results, this paper puts forward some suggestions on load prediction and load characterisctic improvement in Guizhou.
2020, 7(S1): 42-47.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.008
Abstract:
[Introduction] As China's power market and system reform enter the deep water area, the market-oriented competition of emerging power businesses is intensifying. Responding to the rapidly changing market environment requires flexible and powerful information technology support. How to adapt the informatization foundation of power grid enterprises to the strategic transformation under the new market-oriented competition of emerging businesses has become a key issue that grid companies must solve in the process of developing emerging businesses. Method The traditional monolithic information system construction model was difficult to adapt to rapid market competition due to the time-consuming system construction. This paper proposed to build a mid-stage shared service architecture that supports rapid response and agile iteration, and introduces the mid-stage shared service architecture goals and Architectural ideas, put forward a five-step method for combing shared service centers, focusing on the methodology of combing shared service centers and shared services based on business process analysis methods, and proposed the principle of minimizing closed loops and staged iterations when enterprises land in the shared service center architecture Implement strategies and make recommendations for enterprises to build the organizational structure and operational ecology of mid-stage architecture. Result Research and application show that the mid-stage shared service architecture can support grid companies to quickly respond to the needs of emerging power business markets, and play an IT support role for grid companies in the transformation process. Conclusion The mid-stage shared service architecture has proved to be effective both inside and outside the industry. Enterprises must continue to innovate and develop from multiple dimensions of technology, business, organizational team, and ecosystem, so that mid-stage architecture can continue to exert value.
2020, 7(S1): 48-52.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.009
Abstract:
[Introduction] The paper aims at the shortage of traditional in-situ fault-handling voltage-time mode or new technology intelligent distribution in the existing distribution automation technology, an intelligent distributed voltage-time dual strategy local fault segment discrimination method is proposed. The characteristics of automatic fault handling of in-situ feeders are analyzed. Method Intelligent distributed was adopted as the main protection of the system. In the case of the failure of the intelligent distributed primary protection, the system lost power to the voltage-time backup protection through the substation delay trip, step-by-step closing for fault location, isolation and fast recovery of non-faulty sections. The entire process of fast recovery of the fault zone. Result The test results show that the time of intelligent distributed completion protection is less than the maximum cut-off time ΔT1 (150 ms), and the over-current delay time fixed value ΔT2 in the voltage-time backup protection mode is between 200~300 ms. Conclusion The method can guarantee the reliability of power supply for the rapid processing of faults, and can be promoted in the application of actual distribution network.
2020, 7(S1): 53-58.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.010
Abstract:
[Introduction] Point cloud data can be gotten during the electric line inspection using the LiDAR technology. The point cloud should be classified if the point cloud need to be used in the advanced applications. And the ground points classification is a very important progress during the progress of the point cloud classification. And the ground points extraction method based on the progressive Encryption TIN can extract the ground points accurate but the efficient of the method is very low. Method To the problem we proposed an imitation progressive encryption TIN method. The method based on the Progressive Encryption TIN method and assumed that the plane of nearest three points was more accurate the extract the ground compared with the triangulation plane. In this method the kd-tree was used to organization the point to improve the efficiency. Result The purposed method improves the efficiency very much compared with the progressive encryption TIN method with the almost same accurate. Conclusion And the purposed method can meet the requirement of the fast and large data process.
2020, 7(S1): 59-61.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.011
Abstract:
[Introduction] In order to solve the problems such as tight schedules, uneven construction quality, difficult construction quality monitoring, and possible environmental pollution, this paper discusses the practical application of prefabricated power distribution station in distribution network construction. Method This paper analyzed the application of prefabricated power distribution station from three aspects: design,construction technology and comprehensive benefit comparison. Result Compared with the traditional on-site operation method, the prefabricated distribution station can greatly reduce the construction period by about 50%~60%, improve the construction quality, reduce resource consumption and reduce the impact on the surrounding environment. Conclusion Flexible use of prefabricated power distribution station can effectively solve the above problems. The prefabricated power distribution station has a high promotion and application value in distribution network construction.
2020, 7(S1): 62-67.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.012
Abstract:
Objective The existing power grid GIS platform based on the geographical layout and the internal wiring diagram of the station building carries out the maintenance and business application support of the low-voltage station area data, which can not fully meet the application needs of the business department for further mining, refining and lean management of the low-voltage station area data information. In order to better support the relevant business applications of the low-voltage station area, it is urgent to carry out the low-voltage station area based on the low-voltage station area research on the application management mode of graph. Methods Through the detailed analysis of the business requirements of the low-voltage platform area map, targeted research on the automatic mapping algorithm of the low-voltage platform area map was carried out to realize the automatic generation of the low-voltage platform area map; research on the automatic layout and automatic routing algorithm was carried out to realize the initial layout adjustment of the low-voltage platform area map through the intelligent layout and routing algorithm; research on the layout and routing adjustment tools to support the personalized users based on the electronic handover process, the incremental update of the low voltage table area map was realized. Results Through the test and verification of the pilot power supply bureau, the automatic mapping technology of the low-voltage station area map realizes the automatic generation and initial layout and wiring of the low-voltage station area map, supports the manual layout and wiring adjustment of the low-voltage station area map, and realizes the flow-based incremental update and version management of the low-voltage station area map combined with the electronic transfer process. Conclusion The automatic mapping technology of the low-pressure table area map greatly reduces the maintenance workload of the low-pressure table area map, ensures the timely and accurate update of the low-pressure table area map data, and lays a foundation for the lean management of the low-pressure table area.
2020, 7(S1): 68-71.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.013
Abstract:
Objective To solve the problem that the arcing horn fixing on insulator string of electric transmission line is limited by the direction of link fittings, a novel socker eye is designed, which can realize the arcing horn is fixed in two direction for different conditions. Method The main reason for the limitation of insalling arcing hole was that it can only be fixed in only direction on the common socker eye linking with insulator. The neck of the socker eye was designed as a square, and the arcing horn was fixed on the socker eye with hold hoop method. Result The novel socker eye meets the mechanical connection requirement for fittings, simplifies the installation of arcing horn, and improves the stability. Conclusion The research results are of universal significance and can be popularized in practical application.
2020, 7(S1): 72-77.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.014
Abstract:
[Introduction] In order to carry out pre-construction environmental survey and submarine cable testing during operation and maintenance period of submarine cable engineering, it is necessary to use a variety of instruments and equipment to survey the environment, water depth and geological conditions of submarine cables and their surrounding sea areas. Method To effectively manage and display these data, this paper studied the multi-source data analysis and fusion, and the three-dimensional visualization of submarine cable engineering data, and developed a multi-source data management and visualization prototype system for submarine cable engineering. Results It effectively improves the management level of the submarine cable routing environment measurement and periodic inspection data of the submarine cable operation and maintenance management department, and have a more intuitive understanding of the submarine environment, risk points and obstacles of the submarine cable under its jurisdiction, and is a submarine cable safety. A scientific assessment of the situation provides valid information. Conclusion Based on the research, multi-source survey data management and three-dimensional display of submarine cable engineering can visually display the abstract data of the marine environment of the routing area, and provide powerful services for design, construction and operation and maintenance.
2020, 7(S1): 78-81.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.015
Abstract:
[Introduction]In view of the inferior position of coal-fired units in the power market competition compared with other types of power generating units, this paper, based on the situation of Zhuhai Power Plant, explores the control strategies of the units themselves and the ways to reduce production costs from the modification of external equipment, so as to improve the performance and efficiency of the units and obtain greater economic benefits. Method Combining to the current development level of thermal power technology and market requirements, feasibility analysis was carried out in three aspects: coordinated control parameters optimization, installation of energy storage system and heating converted project, and their optimization methods and necessary conditions were listed. Result According to the current practice results of these technologies in various power stations, it is concluded that the optimization of the above-mentioned methods according to the actual situation of the units can reduce the generation cost, significantly improve the unit performance and its competitiveness. Conclusion The optimization strategy discussed in this paper can effectively improve the current predicament of coal-fired units. It can not only improve the safety and reliability of the units in operation,but also ensure that the units occupy a place in the fierce market competition. It has practical guiding significance for all coal-fired units.
2020, 7(S1): 82-87.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.016
Abstract:
[Introduction] The construction of combined cycle unit power plants has been in a blowout state, among which the construction of class 9H unit has been increasing in recent years. It is necessary to study the design and optimization of chemical control and monitoring system. Method Taking a class 9H combined cycle power plant as an example, the design and optimization of chemical control and monitoring system were studied according to water and steam quality criterion and guideline of chemical supervision. Result Through the selection of high tightness condenser, reliable condensate polishing and boiler make-up water treatment process, feed water adopts oxidizing total volatilization treatment AVT(O), boiler water adopts phosphate treatment, the sampling system sets up with perfect on-line monitoring instruments, can ensure the safety, reliability and economic operation of the unit. Conclusion This paper aims to provide an optimization scheme for the design of chemical control and monitoring system of class 9H combined cycle unit in the futur.
2020, 7(S1): 88-92.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.017
Abstract:
[Introduction] Offshre wind turbine support structure is under large stochastic loads within the whole design life, thus fatigue design is an important subject. The Equivalent Fatigue Static Load Method (EFSLM) is widely used in calculating the cumulative fatigue damage, while this method is questionable and is studied in this research. Method After a short review of EFSLM, its application scope was analysed theothetically. Based on NREL 5 MW wind turbine model and pseudo survey data, the quasi-dynamic method and EFSLM were used in calculating the cumulative fatigue damamge of a joint. Result EFSLM is accurate only if the 1st principle stress is linear proportion to loads. Numerical simulation results indicate that EFSLM over estimates the cumulative fatigue damage. Conclusion EFSLM over estimates the cumulative fatigue damage and the quasi-dynamic method is an alternative method, while, the accuracy of which needs further studies.
2020, 7(S1): 93-96.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.018
Abstract:
[Introduction] In order to explore the economic benefits of nuclear power plant – pumped storage power plant combined operation, the feasibility of the joint operation of the two is analyzed. Method This paper studied the economics of nuclear power plant in Fujian Province, calculated the electricity cost of nuclear power under different annual utilization hours and the electricity cost out of permitted annual utilization hours. Based on the nuclear power related policies of Fujian Province and the joint operation mode of “Nuclear Power Plant–Pumped Storage Power Plant”, a preliminary discussion on joint venture economy was carried out. Result The calculation results show that when the utilization hours are higher than a certain value, the margin of nuclear power generating capacity is low. Conclusion Under certain conditions the financial viability of both parties after “nuclear power plant–pumped storage power plant” combined operation is improved.
2020, 7(S1): 97-101.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.019
Abstract:
[Introduction] In order to improve the efficiency and quality of nuclear power design interface, it is necessary to upgrade the management of nuclear power design interface. Method In this article, through analyzing the current situation of nuclear power design interface and management were proposed to nuclear power design interface management upgrade. Result Comprehensive the above analysis, puts forward feasible suggestions on nuclear power design interface management upgrade. Conclusion This article's management upgrade approach provides guidance for subsequent item design.
2020, 7(S1): 102-107.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.020
Abstract:
[Introduction]With the development of power dispatching services and information services, the reliability and management requirements of the power supply system for power computer room are getting higher and higher. Method In order to better improve the reliability and flexibility of the power supply system of the power room, we analyzed and discussed the busway technology of the power computer room. This thesis focused on the application analysis of the busway technology in the power computer room, focusing on the technical principle and composition of the busway technology, as well as the design technology and economy of the traditional cable. Result Through comprehensive comparative analysis technology, overall investment cost, and post-maintenance cost, busway technology has low total cost of ownership and high technical reliability. Conclusion The power grid busway technology is worthy of promotion and application, and can also provide reference for power supply and distribution solutions in power data center.
2020, 7(S1): 108-113.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.021
Abstract:
[Introduction] In order to improve the reliability of relay protection from the point of view of data center as a whole, the relay protection system of power dispatch control center is designed entirely, and an integrated relay protection idea is proposed. Method Starting from the entire distribution structure of power dispatching control center, the integrated design of relay protection was coordinated, and the whole distribution facilities were controlled by an integrated mechanism. Result According to the research in this paper, it is proved that the integrated relay protection can greatly simplify the relay protection strategy of the original power dispatch control center, improve the protection action time, ensure the selectivity of relay protection action, and improve the reliability of power supply. Conclusion This paper provides an idea of integrated relay protection , which provides a forward-looking idea and direction for the development of related products.
2020, 7(S1): 114-118.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.022
Abstract:
Objective In order to build smart cities and fulfill the communication requirements of smart grids, Costa Rica needs broadband reliable communication networks. Method Using FTTX architecture, GPON technology to build broadband access level fiber network. Results Comprehensively utilizing pipe trench and tower resources of power Grid company, using GPON, multi-level light splitter and other technologies to build an ODN fiber network, which covers over 120,000 users of Heredia province, Costa Rica, fulfill the high-speed broadband communication needs of smart city and smart grid. Conclusion Those technologies and the planing methods used in the build of an intelligent broadband communication network in Costa Rica can provide a good reference for the development of Chinese Smart Grid.
2020, 7(S1): 119-126.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.023
Abstract:
[Introduction] In order to further optimize the design of meter testing and storage, this paper proposes a Demo3D simulation based survey and design method of the “intelligent meter testing line and storage system”, which reduces the work intensity of designers as much as possible on the premise of guaranteeing the advancement, integrity and correctness of the scheme. Method The method included basic design input data collection, parameter calculation, testing line key parameters calculaiton, Intelligent warehouse key parameters calculation, simulation input parameters calculation, simulation design work, simulation output work and output design results. Result This method provides relevant technical support for construction units, designers, equipment manufacturers and construction units, and improves the efficiency and correctness of the scheme and data flow process. Conclusion This proposed method is gradually put into the practical design work in many areas, and has been fully verified and applied in practical work, which proves that the method is feasible, and provides guidance and key technical support for practical application.
2020, 7(S1): 127-130.
doi: 10.16516/j.gedi.issn2095-8676.2020.S1.024
Abstract:
[Introduction] Mongolia is a friendly neighboring country with China. The Belt and Road Initiative proposed by China and Grassland Road Developing Plan in Mongolia have been connected recently, thus Chinese enterprises have got opportunies to invest in Mongolia’s electric power. Method We viewed the genaral situation of Mongolia’s economic and social development，energy resource and power industry development, and utility management, then analyzed the power demand and power planning of Mongolia before 2030. Result On this basis，we proposes the investment opportunities and corresponding suggestion for Chinese enterprises to participate in Mongolia’s generation, grid and power interconnection. Conclusion At present,Mongolia has a large potential for electric power development. On the premise of risk prevention and control，it is suitable for Chinese enterprises to seize the investment and construction opportunities.
