Advanced Materials Research Vols. 986-987

Abstract: As the international energy supply remains tense, international oil price continues rising and calls for global environmental protection becomes higher, people attach more and more importance to the research and development of new energy automotive technology, and the industrialization development. Rapid industrialization led to heavy pollution, increasing greenhouse gas emission, which makes the development of new energy automobile have practical significance. Automobile industry is an important mainstay in national economy, its industrial chain is long, correlation degree is high and the consumption pursuing is big. New energy automobile based on the gradual development of low carbon economy is a systemic revolution to the transportation that our society uses and the way of using energy, which will bring to the technical revolution of automobile industry.

Abstract: More and more deep integrated resource planning methods and demand side management (DSM) technologies have been studied and applied in China. Using technological and economic means of DSM, exploiting energy-saving potentialities from demand side, balancing load, easing contradictions of power structure, improving energy utilization rate, etc. have been important tasks in electric power enterprises. Based on this background, the paper designed and developed resources investigation and evaluation system of electric power DSM, which could investigate electricity resources of DSM of China, and implement energy-saving potential evaluation and energy efficiency analysis. From aspects of technology, economy, management, etc. suggestions were proposed for DSM, trying to be more rational and effective to allocate and use electricity resources, seeking satisfaction of power demands to the greatest degree, thus promote sustainable development of electric power enterprises effectively.

Abstract: Sufficient and economical power supply is important for an islanded operation mode with renewable energy. This paper deals with the problem of optimizing photovoltaic (PV) and wind turbine (WT) capacities from the point of view of power supply reliability as well as economics. Meteorological data is analyzed, and then PV and WT capacities are optimized to supply the load reliably. The optimization is also discussed when the load profile is changes. Short-term power system operation is also analyzed. Several different cities in China with different climate features are simulated.

Abstract: The key distribution automation (DA) application for implementing a self-healing smart distribution network is the fault location isolation and service restoration (FLISR) application. With DGs introduce significantly more variability into distribution system power flows, it has a great impact to FLISR. Based on summarizing the existing FLISR scheme, this paper analyses the influence of fault detection and service restoration with large-scale DGs.

Abstract: Establishing an appropriate aggregation model of wind farm is the first step of the electrical computation in wind power integration planning. This paper first summarizes the technical requirements of wind farm model from the viewpoint of engineering, then proposes an aggregation DFIG model of wind farm. Because of the lack of measured data in the planning stage, the single equivalent model is used in this paper, and be improved by considering the equivalent collection lines model. The accuracy of the aggregation model in different electrical calculation, such as power flow, transient stability and shortcut current simulation, is verified through a sample system in DIgSILENT.

Abstract: The energy problem is a matter of human survival and development of a global issue. With the deepening of the new industrialization, energy resources, climate change, environmental problems to human challenge is becoming more and more serious. In the development of China's energy consumption, energy consumption structure and the world in general there are many differences between the consumption structure, rational utilization of domestic coal resources, improve efficiency, promote the reform of energy-using way, will become China's energy industry development in the future be solved the problem. To build China's energy security system is not only the need of China's economic and social development, but also to enhance our voice and influence in the global energy affairs.

Abstract: 330kV transmission line in the northwest region of China is much complex while pollution flashover is a major threat to the safe operation of the system. In this paper, experimental study on effect of contamination on electric field distribution of 330kV composite insulator is presented. High voltage test system of 330kV composite insulator is established according to the ratio of 1:1. Surface electric field and potential of the insulator is measured using GDC-100 optical fiber voltage electric field measuring instrument. Potential, electric field distribution of the two kinds of 330kV composite insulator are tested in different environment of clean, dry and uniform pollution layer. The test and simulation result is also compared.

Abstract: Enhanced grid structure makes the system thermal stability problems increasingly prominent. The thermal stability of grid section is deduced by use of DC power flow method in typical equivalent system, furthermore, the effect of section N-1 breaking on active power flow in operating equipment is analyzed. Based on the principle of active power flow distribution to meet the impedance proportional relationship, thermal stability limit section assessment methods and processes are presented, which can achieve fast assessment on thermal stability limits and restriction faults. Finally, the summer maximum loads mode of Henan Power Grid in 2014 is taken as example, and the thermal stability limit in northern sections is evaluated. The simulation results prove the feasibility of the proposed method. The research results can provide references for dispatchers and related software developers.

Abstract: Power grid, one of the critical infrastructures, is a vital component of the world’s energy supply. Once large-scale natural disaster occurs, it is inevitable to meet unexpected faults on emergency logistic. Fault-tree analysis (FTA) is a risk estimation tool to describe and model causal interactions and logical relationships between undesired events in a system Taking uncertain situation and response failure into consideration, this paper proposed a fault-tree analysis on PG-ELS with fuzzy probabilistic confidence. The most critical failure mode is identified using the ranking method based on interval number.

Abstract: In recent years, advanced small nuclear power reactors, namely small modular reactors (SMRs), gained widespread attention. In areas where energy can’t be provided by large scale reactors and the nuclear power plants with large scale reactors can’t compete with the non-nuclear power plant technology, SMRs, as a versatile distributed integrated energy source, which result in expanding peaceful applications of nuclear energy, have enormous potential. This article describes the characteristics and analyzes prospects and challenges of SMRs.