Research on Crisis Dispatch of Power System Considering Solar Eclipse Impact

2014 ◽  
Vol 687-691 ◽  
pp. 3199-3202
Author(s):  
Wei Hua Chen ◽  
Yan Wei Chen
Keyword(s):  
Power Systems ◽  
Power System ◽  
Solar Eclipse ◽  
Extreme Environments ◽  
Temporal Distribution ◽  
Development Trend ◽  
Total Solar Eclipse ◽  
Stable Operation ◽  
The Status ◽  
The Development Trend

In the view of the safe and stable operation of power system in the extreme environments, the status and the role of two typical provincial power systems in China were analyzed. Combined with the spatial and temporal distribution characteristics of this total solar eclipse in July 22, the operations of the two provincial power systems in different regions during the total solar eclipse were compared. The main impacts of the development process of the total solar eclipse on power systems were analyzed. At last, combined the development trend of the extreme environments in the world, how to reduce the running risk of power system in the extreme environments by the crisis dispatch was explored.

scholarly journals Progress in Research and Application of Natural Polymer Coagulants

2020 ◽  
Vol 143 ◽  
pp. 02042
Author(s):  
Xiao Yu ◽  
Ying Fu
Keyword(s):  
Heavy Metal ◽  
Hot Spot ◽  
Development Trend ◽  
Status Quo ◽  
Dye Wastewater ◽  
Natural Polymer ◽  
Sludge Dewatering ◽  
Heavy Metal Wastewater ◽  
The Status ◽  
The Development Trend

In recent years, natural polymer coagulant has become a hot spot in the field of coagulants due to its safety, harmlessness and biodegradability. This paper introduced the status quo of research of natural polymer coagulants such as starch, chitosan, cellulose and lignin coagulants. And some hot applications in water treatment were discussed, such as heavy metal wastewater, dye wastewater, microalgae collection and sludge dewatering. Finally, the development trend of natural polymer coagulants was prospected.

Summary of the Stability Chanllenges and Safe Operation of Power Systems in View of Dispatching

2014 ◽  
Vol 960-961 ◽  
pp. 1588-1591
Author(s):  
Xiang Dong Zhao ◽  
Xin Zhao ◽  
Ming Jun Lv ◽  
Jian Guo Liu ◽  
Feng Zhen Liu ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Rapid Development ◽  
Power Grids ◽  
System Stability ◽  
Stable Operation ◽  
Safe Operation ◽  
The Stability ◽  
Continuous Power ◽  
Grid Market

The Internet and the gradual implementation of the continuous power grid market in recent years make the power system more complex under different operating environment. Safe and stable operation of power grids have become increasingly important . With the rapidf development of the grid and constant innovation, safe and stable operation also has a new requirement , because the rapid development of the power system brings more This paper analyzes the causes of blackouts and reviews security of the power system stability problems related to measures on the security and stability of the power system operation .

New Technology of Ecological Textile Printing

2013 ◽  
Vol 401-403 ◽  
pp. 856-858
Author(s):  
Hong Mei Li
Keyword(s):  
Environmental Protection ◽  
New Technology ◽  
Development Trend ◽  
Saving Energy ◽  
Printing Technology ◽  
Textile Printing ◽  
The Status ◽  
The Development Trend

As textile printing technology continues to improve, fabric printing changes from in a technical workshop into a science hall. Hitherto unknown achievement is being made. Printing technology is going towards environmental protection, saving energy and reducing consumption. Ecological printing is not only the status what textile development needs, but also the development trend of textiles in future. This paper focuses on the ecological printing and special printing technology.

scholarly journals RESEARCH ON VISUAL ANALYSIS METHODS OF TERRORISM EVENTS

2016 ◽  
Vol XLI-B2 ◽  
pp. 191-196
Author(s):  
Wenyue Guo ◽  
Haiyan Liu ◽  
Anzhu Yu ◽  
Jing Li
Keyword(s):  
Visual Analysis ◽  
Temporal Distribution ◽  
Development Trend ◽  
Event Data ◽  
Thematic Map ◽  
The World ◽  
Spatio Temporal ◽  
Global Terrorism Database ◽  
The Development Trend ◽  
Security Incidents

Under the situation that terrorism events occur more and more frequency throughout the world, improving the response capability of social security incidents has become an important aspect to test governments govern ability. Visual analysis has become an important method of event analysing for its advantage of intuitive and effective. To analyse events’ spatio-temporal distribution characteristics, correlations among event items and the development trend, terrorism event’s spatio-temporal characteristics are discussed. Suitable event data table structure based on “5W” theory is designed. Then, six types of visual analysis are purposed, and how to use thematic map and statistical charts to realize visual analysis on terrorism events is studied. Finally, experiments have been carried out by using the data provided by Global Terrorism Database, and the results of experiments proves the availability of the methods.

scholarly journals Design of Bus Station Based on Sustainable Development and Humanization Designprinciples-Take Two Design Plans for Example

2019 ◽  
Vol 278 ◽  
pp. 05002
Author(s):  
Jianhua Lyu ◽  
Jia Xiang ◽  
Junqi Zhao ◽  
Ming
Keyword(s):  
Sustainable Development ◽  
Case Analysis ◽  
Development Trend ◽  
Scientific Basis ◽  
Literature Analysis ◽  
Functional Requirements ◽  
The Status ◽  
Practical Analysis ◽  
Bus Station ◽  
The Development Trend

This study was performed to investigate the status and exiting problems of bus station design use by using comparative analysis, literature analysis, case analysis and other methods, then provide references for functional requirements of bus station. The theoretical and practical analysis says that principle of sustainability, demand, safety, humanization and cultural heritage should be considered in bus station design. Finally, the research results of this study were demonstrated by the case of two bus station design plans, and the development trend of bus station design are forecasted in order to provide certain scientific basis for the design of bus station in the future.

Status of Pressurized SOFC/Gas Turbine Power System Development at Siemens Westinghouse

2002 ◽  
Author(s):  
Stephen E. Veyo ◽  
Shailesh D. Vora ◽  
Kavin P. Litzinger ◽  
Wayne L. Lundberg
Keyword(s):  
Fuel Cell ◽  
Power Systems ◽  
Power System ◽  
Gas Turbine ◽  
High Efficiency ◽  
System Development ◽  
Hot Water ◽  
Positive System ◽  
The Status ◽  
And Performance

Pressurized solid oxide fuel cell (PSOFC)/micro gas turbine generator (MTG) hybrid power systems have the potential to generate electric power at high efficiency [circa 60% (net AC/LHV)] at multi-hundred kWe and multi-MWe capacities. Thus, good fuel economy and low CO2 emissions are positive system attributes, as are low NOx and SOx emissions due to the propensity of the SOFC for low NOx generation, the need for no firing of the gas turbine combustor during normal hybrid system power operations, and the use of desulfurized fuel. Exhaust temperatures are sufficiently high to enable the recovery of heat for steam/hot-water production, and system energy efficiencies of at least 80% are feasible. Work is ongoing at Siemens Westinghouse on three PSOFC/MTG power systems. Two, with 220 kWe and 300 kWe capacities, are proof-of-concept demonstration units. The 220 kWe PSOFC/MTG power system is in test at the National Fuel Cell Research Center, University of California-Irvine, and the 300 kWe system, which is currently being designed, will be demonstrated in two tests to be performed in Europe. The status of work on the 220 kWe and 300 kWe power systems is reviewed. The third system is to have capacity of at least 500 kWe. This system, which will be demonstrated also, is viewed as a prototype commercial product. The 500 kWe-class PSOFC/MTG concept is described and performance estimates are presented.

scholarly journals A Review of Key Technologies and Trends in the Development of Integrated Heating and Power Systems in Agriculture

Entropy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 260
Author(s):  
Xueqian Fu ◽  
Yazhong Zhou ◽  
Feifei Yang ◽  
Lingxi Ma ◽  
Hai Long ◽  
...  
Keyword(s):  
Power Systems ◽  
Agricultural Development ◽  
Energy Use ◽  
Energy Systems ◽  
Development Trend ◽  
Energy Internet ◽  
The Sustainable Development ◽  
Deep Integration ◽  
The Development Trend ◽  
Improve Food Security

Petroleum agriculture, characterized by mechanization and chemistry, is developing rapidly in China. However, petroleum agriculture has not only brought food safety problems, but also caused great obstacles to the sustainable development of society. In view of the disadvantages of oil agriculture, we provide an upgrading plan for energy systems in agriculture. This work can help reduce carbon emissions and improve food security. We introduce the most advanced technologies in Chinese agricultural development and the technical scope includes new agricultural energy power generation, agricultural energy use and the safe operation of agricultural energy systems. We describe the detailed data of agricultural bioenvironmental and energy engineering to clarify the level of agricultural energy efficiency in China. The overall conclusion of this paper is that the deep integration of agriculture and energy internet has become the development trend of agricultural energy systems.

scholarly journals Obtaining Probability Distribution Laws of Power System Steady-State Mode Parameters

2020 ◽  
Vol 20 (3) ◽  
pp. 41-51
Keyword(s):  
Renewable Energy ◽  
Probability Distribution ◽  
Power Systems ◽  
Power System ◽  
Renewable Energy Sources ◽  
Current Trend ◽  
System Stability ◽  
Energy Sources ◽  
Stable Operation ◽  
Distribution Laws

Stable operation of electrical power systems is one of the crucial issues in the power industry. Current vo­lumes of electricity consumption cause the need to constantly increase the generated capacity, repeatedly modifying and complicating the original circuit. In addition to this, given the current trend towards the use of digital power systems and renewable energy sources, more and more uncertainties difficult to predict by standard mathematical methods appear. Events in the power system are deterministic, i.e. random. Thus, it is difficult to fully assess the system stability, voltage levels, currents, or possible power losses. Finding the probability distribution laws can give us an understanding of all the possible states in which an object can exist. Obtaining them is complicated by the difficulty of accounting for all the correlations between the random arguments of the source data. These laws are necessary to determine the optimal operating modes, the possibility of solving the problem of determining the optimal renewable energy sources installation locations and the required amount of generated energy in a non-deterministic way. The purpose of this article is to test the developed SIBD method for obtaining the full probabilistic characteristics. This method, unlike the Monte Carlo methods, does not use a random sample of initial data, but completely covers the studied functional dependence. The problem was solved using the provisions of probability theory and mathematical statistics, numerical optimization methods in particular. The MATLAB Matpower application package was also used to solve technical computing problems.

scholarly journals Equal-area criterion in power systems revisited

2018 ◽  
Vol 474 (2210) ◽  
pp. 20170733
Author(s):  
Yong Sun ◽  
Jinpeng Ma ◽  
Jürgen Kurths ◽  
Meng Zhan
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transient Stability ◽  
System Analysis ◽  
Stable Operation ◽  
Equal Area ◽  
Power System Analysis ◽  
Stability Behaviour ◽  
Single Machine Infinite Bus ◽  
Machine Systems

The classic equal-area criterion (EAC) is of key importance in power system analysis, and provides a powerful, pictorial and quantitative means of analysing transient stability (i.e. the system's ability to maintain stable operation when subjected to a large disturbance). Based on the traditional EAC, it is common sense in engineering that there is a critical cleaning time (CCT); namely, a power system is stable (unstable) if a fault is cleared before (after) this CCT. We regard this form of CCT as bipartite. In this paper, we revisit the EAC theory and, surprisingly, find different kinds of transient stability behaviour. Based on these analyses, we discover that the bipartite CCT is only one type among four major types, and, actually, the forms of CCT can be diversified. In particular, under some circumstances, a system may have no CCT or show a periodic CCT. Our theoretical analysis is verified by numerical simulations in a single-machine-infinite-bus system and also in multi-machine systems. Thus, our study provides a panoramic framework for diverse transient stability behaviour in power systems and also may have a significant impact on applications of multi-stability in various other systems, such as neuroscience, climatology or photonics.

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