Construction Of Smart Grid Research Articles

Role of Government on China Smart Grid Construction

With more and more attention are paid on energy security and environment, smart grid has become an important direction of future energy industry development all over the world. In order to fully exploit the role of government on the development of smart grid, this paper first discusses the insufficiency of government function execution during the construction of smart grid in China at present from the respects of smart grid planning, laws making, supervising, electric structure reform, and management function execution. Then this paper presents some suggestions on the fulfillment of government function on the construction of smart grid. Many measures should be taken from both macro and micro field to fulfill the government function on the construction of smart grid to realize healthy development of smart grid.

Overview of Ontology-Based Power System Applications

With the construction of smart grid, an increasing number of resources of smart grid knowledge base inevitably lead to the information island of power system and low utilization ratio of power system knowledge. Introduced the ontology for knowledge representation of Smart Grid domain and constructed a repository to be shared by each application software system. It can enhance the power system simulation and analysis capabilities of the complex state of the Smart Grid. At present, Smart Grid lacks of researches on knowledge applications based on ontology technology. This paper introduces some typical applications based on ontology, elaborates the application status of the ontology in power system. According to the ontology technology applied to typical domains, it looks forward to the direction of ontology-based applications in power system.

Research of Cable PD Detected Technology Based on Variable Frequency Oscillation Wave

With the accelerating construction of strong smart grid, and the grid voltage level rising, performance requirements for the electrical insulation of electrical equipment also continue to increase. The ( XLPE ) cable with good electrical and thermal performance and simple structure, the manufacturing cycle is short, safe and reliable power supply etc, which is widely used in power system ; Partial discharge is in the power cable to run a larger security risks is a sign of deterioration of the cable insulation is caused by insulation deterioration of important reasons . In this paper, based on variable frequency resonant damped oscillatory wave voltage XLPE cables and their connectors partial discharge site detection technology, the damped oscillatory wave voltage and power frequency voltage equivalent; the field test requirements, parameter optimization and performance detection impedance, and use advanced digital signal processing methods to analyze the test data processing, to provide a reference for the cables and their joints more accurately determine the insulation condition.

Comprehensive Evaluation of Regional Grid Development Level of China under the Smart Grid Construction

The construction engineering of smart grid is the key plan for the electricity grid development of China. To build a strong smart grid has been the main goal for the development of regional grid, thus, it is of great significance to study on the smartness level of regional grid. This paper establishes a comprehensive evaluation system for the regional grid development level; analyzes from aspects of safety, economy, quality, and efficiency. A hierarchical optimized combination evaluation model is proposed, and its progressiveness and applicability are verified. The study provides theoretical basis and practical evidence for judging the development level of regional smart grid construction of China from an overall and multi-angle perspective.

云南建设智能电网的战略意义

智能电网比常规电网更加安全可靠，可以更好地兼容可再生能源发电并网，世界各地都在规划建设智能电网。国内外电网发展趋势及云南电网面临的众多安全问题都要求云南电网加快智能电网建设。本文从能源开发需求、国家宏观政策及电力体制改革要求、优化电网运行和管理模式、电网安全需要和实现在国内省网公司中的领先地位等五方面探讨了云南电网公司建设智能电网的战略意义。 Smart grid is safer and more reliable than traditional grid, and it’s more compatible for renewable energy generation, and smart grid is being in plan and construction all over the world. The development trend of power grid at home and abroad and many security problems that Yunnan Power Grid faces require Yunnan Power Grid to speed up the construction of smart grid. This article discusses the strategic significance of smart grid construction in Yunnan Power Grid in the five aspects, i.e. the energy development demand, the national macro policy and reform of the electricity management system requirements, optimization of power grid operation and management mode, the power grid security requirements and making Yunnan Power Grid achieve the leading position among all the power grids of China.

The Study of Overhead Line Fault Probability Model Based on Fuzzy Theory

In the background of the design and construction of Smart Grid Operation Supporting System for District Power Networks, this paper established the weighted fault probability model of the overhead line which is based on equipment operating status, utility theory and fuzzy theory. In this model, the proper membership function is adopted to describe the influence of lightning, wind speed, line ice and temperature, and the outage rate of overhead line, derived from historical statistics, is amended. Based on this model, the power supply risk analysis software is developed to calculate the online risk indicators of district grid, and provide real-time decision support information based on risk theory for scheduling operations personnel.

云南智能电网建设浅析

云南电网肩负着云南电力供应和电力外送双重任务,自身结构复杂。本文通过分析云南电网现状，对比云南电网与智能电网要求的差距，提出在云南智能电网的建设中要注意：设备是系统的基础，要加强实时、自动化、电器和用户的交互式技术的开发，建设与智能电网相适应的电力市场。 Yunnan power grid has a complex structure and shoulders the dual task of local power supply and power ex-port. In this paper, by analyzing the Yunnan power grid status quo and comparing Yunnan power grid with the smart grid, Yunnan smart grid construction should be advised: as the device is the basis of the system, it is necessary to strengthen the development of real-time automation, the interactive technologies between the electrical appliance and the users, and construct the electricity market which is suitable for the smart grid.

Study on Classification of Information to Realize Grid Intelligent

The accsess of large numbers of new energy and the difference of application requirements make information more huge and complex, different application system and different grid link has also a different protocol standards,All these make the visual display of information, unified modeling for power grid automation become complicated and trival. This article according to analysis the power grid stability and control theory, from the power grid stability and controlling ,the needed information and IEC61968 / IEC61970 / IEC61850 and other international standards are analyzed, and propose a power network information classification method, and get a power information classification, accord with smart grid construction and new energy access requirements. It can effectively direct building of power automation control model, control information interaction. Provide foundation support for grid unified modeling and the method of unified describe model.

An approach for the integration of renewable distributed generation in hybrid DC/AC microgrids

This paper presents an investigation of a hybrid DC/AC integration paradigm to establish microgrids (MGs) by using a conventional three-phase local power delivery system. This approach adds an additional DC power line to the local power distribution system in order to collect energy generated by distributed domestic renewable sources. The local renewable distributed generation (DG) works in conjunction with the conventional grid utility to reduce the power draw from the grid. Researchers designed an energy conversion station to mix energy from the local DGs with energy from the grid utility. This approach, therefore, uses a continuous energy mixing strategy for DC integration of local generation and grid energy to supply energy to MG consumers via the conventional three-phase power distribution system. Thus, local distributed renewable generators do not have to contend with AC integration problems, such as AC stability and line synchronization. This approach can facilitate the transformation of conventional local power distribution systems into reliable MGs in an affordable way for stakeholders and it is a step towards construction of future smart grids.

The Design of Power Quality Online Monitor Device under Smart Grid

With the development and construction of smart grid, more and more attentions have been paid to the detection of power quality. Study the disadvantages of wired communication network, applied wireless sensor network technology to power quality online monitoring system. Introduced the hardware and software architectures, designed the detection node and gathering node based on CC2430 and LPC2214 respectively, introduced the establishing process and algorithms of WSN based on ZigBee technology. Experimental results show that, the system can remotely monitor power quality of monitoring points on the power grid, can optimize the power grid operation, and provide enterprises with a reliable basis for energy conservation and emissions reduction.

Secondary battery systems for energy storage in smart grids

Secondary batteries that store and convert electrochemical energy show broad application prospects in renewable energy systems such as wind and solar energy, and in the construction of smart grids. This paper describes the basic working principles, properties,research and development, stationary applications and advances of lead-acid, sodium sulfur, redox flow, and lithium-ion batteries. Important problems currently limiting the development of these batteries are highlighted. Energy storage batteries need to focus on the areas of long life, low cost, high safety, high capacity, high power, fast charging/discharging and environmental adaptability. The future research topics are suggested.

Frequency Estimation Using a Genetic Algorithm With Regularization Implemented in FPGAs

This paper proposes an accurate and precise genetic algorithm (GA) for frequency estimation of electrical power system (EPS) signals. The problem of estimating the frequency of a distorted electrical signal is modeled as an optimization problem. A regularization technique is used to guide the GA to a plausible solution from a practical point of view when the signal has significant output distortions. In this approach, the GA using regularization (GAR) enables the balanced investigation of a number of potential solutions, largely exploring the search space from one side, and weighing the suitable solutions according to practical purposes from the other side. The GAR is programmed in a field-programmable gate array (FPGA) device. This is made possible due to 1) the implicit parallelism of FPGAs in computing their instructions and 2) the suitable choice of steps of GARs to explore this parallelism. To evaluate the performance of the proposed method, an EPS was simulated having typical operation conditions. The relatively high robustness exhibited by the GAR to harmonics and noise makes it a promising equipment in the challenge of construction of smart power grids.

FTU Wireless Intelligent Information Acquisition System Based on ARM11

With the development of smart grid construction, a large number of intelligent electrical equipment has been applied. In order to facilitate the onsite FTU data acquisition, use S3C6410 with ARM11 kernel and Windows CE embedded system as platform to develop and design wireless intelligent information acquisition system. After the hardware platform and embedded system are completed, add wireless module driver, develop information frame format of communication protocol, and according to the application software requirements, design and develop FTU wireless communication applications. After experimental testing, FTU wireless communications is fulfilled between the portable equipment and 10KV power lines; then acquires and process the returning data. This article provides feasibility program for the FTU field local test.

Automatic Control Technology in Smart Power Generation

Automation of power generation and its control process is inevitable trend and requirement. In construction of smart grid, clean energy is a significant indicator of smart grid, and energy conservation and emission reduction is a major research task. Automatic control technology in power generation especially in energy conservation and emission reduction is briefly introduced in the paper. In power plant, there are some problems to solve in desulphurization and water feeding, and the application of automatic control technology could solve or improve the problems in some degree.

The Smart Grids in China—A Review

The concept of the smart grid has been gaining more and more attention worldwide since it was proposed by the U.S. Electric Power Research Institute in 2001. Recently, it has been propelled again by the promotion of low carbon economies in developing countries. To satisfy the exponential increase in electricity demand and alleviate environmental degradation caused by fossil fuel-based power generation, China has made great efforts in constructing a smart grid as a substitution of traditional energy-intensive power grid. In the 12th Five-Year Plan in particular, it was stated that emphasis should be placed on the development of renewable energy and smart grids. The objective of this paper is to provide an insight into the current research on smart grids, and shed light on the development of smart grids in China, based on the analysis of which, the obstacles and barriers in the development process are identified. Finally, policy prospects on the construction of smart grids in China are proposed from the aspects of technology, administration and management.

Tap-Changer Sliding Gear Urgent Stop Device of Main Transformer Integrated with RTU

The security risks of using tap-changer of main transformer in substation to adjust remote operation and automatic sequence operation were analyzed, the tap-changer slider gear urgent stop devices of main transformers integrated into RGT were designed and developed and the functions of the system, hardware construct and software system were discussed in this paper. The vigorously developing of smart grid construction and practice application of this device are shown that the method has the urgency and effectiveness

The Application of the Internet of Things in the Smart Grid

The application and development of the Internet of Things have close relationship with the construction of smart grid. Generally, each of electrical equipment can be connected together by wireless communication technology and sensing technology in the Internet of Things to make the smart grid become a real-time interactive electrical network. This paper summarizes the development situation, analyzes its structure and characteristics and introduces the key technologies supporting the application of the Internet of Things. In view of the functions and features of the Internet of Things and the development requirements of smart grid, it analyzes the specific application scope and level of the Internet of Things in the smart grid. It makes some concrete analysis and discussion about the application of the Internet of Things in the asset management and remote automatic reading meter system of smart grid and summaries and prospects the application situation of the Internet of Things in the smart grid

A Decision-making Model on Stage Financing for Smart Transmission Grid Investment Based on Technology Readiness

Under the construction of smart grid, transmission grid investment is faced with many potential risks, and high flexibility of decision-making is asked. Based on technology readiness theory, stage financing issues for transmission grid investment are studied. Then transmission grid investment is divided into several stages, and in order to form an optimal investment scheme and find reasonable fund for each stage, a decision-making model for transmission grid investment based on technology readiness is established. The model is validated through three-stage transmission grid investment project in IEEE-24 bus system, to consider the optimal investment decision between transmission lines and TCSC devices.

An Analysis on the Low-carbon Benefits of Smart Grid of China

In order to research the relation between smart grid and low carbon economics, it makes quantitative analysis on the influence exerted by carbon emissions in the power industry over the years, which partially indicates the necessity of low carbon power development. Considered current technology level of smart grid, it proposes suggestions about how to achieve low-carbon electricity. By the method of linear smoothing, it forecasts the value of carbon emissions in the power industry .Meanwhile, figures out the cost of carbon emissions in accordance with the carbon emission prices in international carbon market. Thus, low-carbon benefit of smart grid is 224.57billion yuan, which provides a reference for the construction of smart grid in the coming years.

Release System of Real-Time-Price Oriented to Smart Meters

This paper presents the release system of real-time-price oriented to smart meters, which includes fixing, transmission and distribution of real-time-price. With the interactive of smart meters and remote high-speed communication technology, the system implements two-way communication between real-time-price information of power supply enterprises and electricity utilization information of users. Through an interactive terminal, the users are guided to save electricity. The system has important meaning for the information construction of smart grid and the management of demand side.