Evaluating the impact of Khanh Son power plant on Danang Distribution Network

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Thi Minh Tu Bui ◽  
Hong Lam Le ◽  
Nam Khoa Le ◽  
Quoc Thien Phan ◽  
Kiep Van Nguyen ◽  
...  
Keyword(s):  
Power Plant ◽  
Negative Impact ◽  
Waste Incineration ◽  
Main Task ◽  
Steady State Mode ◽  
Power Sources ◽  
Main Cable ◽  
National Power ◽  
The Stability ◽  
The Impact

Abstract Today, the expansion of power sources is the main task to meet the development of demand. Therefore, Da Nang City has been approved to build the Khanh Son waste incineration power plant in the near future. The Khanh Son power plant project not only helps to reduce a large amount of waste in the area but also provides electricity supply directly to the city, increasing the budget for that locality. However, the connection of this power plant to the system will modify the operating parameters of the grid which may cause some negative impact on the regional power system. Therefore, the main aim of this paper is to simulate various operation modes of the system such as steady-state mode, short circuits, and transient to evaluate the impact of the connection of the new power plant on the national power. The result shows that the Khanh Son power plant helps to reduce the overload of the main cable during the high load scenario, the stability of the system is enhanced significantly. Based on the simulation results, some recommendations to ensure the stabilizing of the grid have been proposed as well.

scholarly journals Control the System and Environment of Post-Production Wind Turbine Blade Waste Using Life Cycle Models. Part 1. Environmental Transformation Models

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1828 ◽  
Author(s):  
Izabela Piasecka ◽  
Patrycja Bałdowska-Witos ◽  
Józef Flizikowski ◽  
Katarzyna Piotrowska ◽  
Andrzej Tomporowski
Keyword(s):  
Life Cycle ◽  
Power Plant ◽  
Wind Power ◽  
Power Plants ◽  
Negative Impact ◽  
Polymer Materials ◽  
Wind Power Plant ◽  
Polymer Waste ◽  
Wind Power Plants ◽  
The Impact

Controlling the system—the environment of power plants is called such a transformation—their material, energy and information inputs in time, which will ensure that the purpose of the operation of this system or the state of the environment, is achieved. The transformations of systems and environmental inputs and their goals describe the different models, e.g., LCA model groups and methods. When converting wind kinetic energy into electricity, wind power plants emit literally no harmful substances into the environment. However, the production and postuse management stages of their components require large amounts of energy and materials. The biggest controlling problem during postuse management is wind power plant blades, followed by waste generated during their production. Therefore, this publication is aimed at carrying out an ecological, technical and energetical transformation analysis of selected postproduction waste of wind power plant blades based on the LCA models and methods. The research object of control was eight different types of postproduction waste (fiberglass mat, roving fabric, resin discs, distribution hoses, spiral hoses with resin, vacuum bag film, infusion materials residues, surplus mater), mainly made of polymer materials, making it difficult for postuse management and dangerous for the environment. Three groups of models and methods were used: Eco-indicator 99, IPCC and CED. The impact of analysis objects on human health, ecosystem quality and resources was controlled and assessed. Of all the tested waste, the life cycle of resin discs made of epoxy resin was characterized by the highest level of harmful technology impact on the environment and the highest energy consumption. Postuse control and management in the form of recycling would reduce the negative impact on the environment of the tested waste (in the perspective of their entire life cycle). Based on the results obtained, guidelines and models for the proecological postuse control of postproduction polymer waste of wind power plants blades were proposed.

The stable transfer method using zero power control in the CTTS system

2019 ◽  
Vol 57 (4) ◽  
pp. 376-384 ◽  
Author(s):  
Ho-Yun Seon ◽  
Ji-Hoon Yang ◽  
Sang-Hun Lee ◽  
Seong-Mi Park ◽  
Sung-Jun Park
Keyword(s):  
Power Control ◽  
Power Supply ◽  
Current Flow ◽  
The State ◽  
Power Sources ◽  
Electrical Arc ◽  
Transfer Method ◽  
The Stability ◽  
The Impact ◽  
Grid Management

In the CTTS system, while transferring the power supply from the grid to the generator, a sudden arc arises, which causes damage to the system. The method proposed in this study reduces this damage. The power state of the generator stage is made equal to the state of the power of the grid in order to prevent the occurrence of a sudden arc. Even if the generator power state is the same with the power state of the generator, an arc can be generated due to a sudden current flow during the transfer. Therefore, the current in the generator stage is controlled to 0 (zero) when transferring, so that the generation of an electrical arc is minimized. In general, when the CTTS system is used for transferring power sources with an emergency generator, the impact from the electrical arc will be momentarily proportional to the amount of the power supplied from the generator to the load. The damage by the arc will make the life of the CTTS system shorter. In order to prevent such damage, a blocking technique using parallel capacitor is constituted. However, this causes arc generation at the time of input. Thus, in this paper, it is proposed to control the effective or ineffective power of the system to zero. To verify the validity of the proposed method, firstly the Powersim simulation was conducted, and after confirming the feasibility based on this, the actual prototype was created and implemented. Zero power control is proposed as a way to improve the stability of CTTS by significantly reducing the generation of an electrical arc. And this technique can help people working on the distributed power or the grid management.

scholarly journals The GAPS programme at TNG

2020 ◽  
Vol 641 ◽  
pp. A68
Author(s):  
D. Barbato ◽  
M. Pinamonti ◽  
A. Sozzetti ◽  
K. Biazzo ◽  
S. Benatti ◽  
...  
Keyword(s):  
Negative Impact ◽  
Semimajor Axis ◽  
Giant Planet ◽  
Habitable Zone ◽  
Lower Mass ◽  
Outer Planets ◽  
Long Period ◽  
Dynamical Simulations ◽  
The Stability ◽  
The Impact

Context. With the growth of comparative exoplanetology, it is becoming increasingly clear that investigating the relationships between inner and outer planets plays a key role in discriminating between competing formation and evolution models. To do so, it is important to probe the inner region of systems that host long-period giants in search of undetected lower-mass planetary companions. Aims. In this work, we present our results on the K-dwarf star BD-11 4672, which is already known to host a long-period giant planet, as the first output of a subsample of the GAPS programme specifically aimed at assessing the impact of inefficient migration of planets formed beyond the snowline by searching for Neptune-mass and super-Earth planetary companions of known longer-period giants. Methods. We used the high-precision HARPS-N observations of BD-11 4672 in conjunction with time series taken from the literature in order to search for additional inner planetary signals to be fitted using differential evolution Markov chain Monte Carlo. The long-term stability of the new orbital solutions was tested with N-body dynamical simulations. Results. We report the detection of BD-11 4672 c, a new Neptune-mass planet with an orbital period of 74.20−0.08+0.06 d, eccentricity of 0.40−0.15+0.13, semimajor axis of 0.30 ± 0.01 au, and minimum mass 15.37−2.81+2.97 M⊕, orbiting slightly outside the inner edge of the optimistic circumstellar habitable zone. In order to assess its impact on the dynamical stability of the habitable zone, we computed the angular momentum deficit of the system, showing that planet c has a severe negative impact on the stability of possible additional lower-mass temperate planets. The BD-11 4672 system is notable for its architecture, hosting both a long-period giant planet and an inner lower-mass planet, the latter being one of the most eccentric Neptune-mass planets known at similar periods.

scholarly journals Impact of micro hydro power plants on transient stability for the micro grid 20 kV system

2021 ◽  
Vol 24 (3) ◽  
pp. 1278
Author(s):  
Syarifuddin Nojeng ◽  
Syamsir Syamsir ◽  
Reny Murniati
Keyword(s):  
Power Plant ◽  
Power System ◽  
Electric Power ◽  
Transient Stability ◽  
Interconnection Network ◽  
Electric Power System ◽  
Hydro Power ◽  
Micro Grid ◽  
The Stability ◽  
The Impact

Transient stability analysis is conducted to determine the ability of the electric power system in maintaining the operating stability after a major disturbance. The disturbance can be trigger an impact on the stability of the rotor angle, voltage, and system frequency which can cause loss of synchronization. In this paper, the impact of the interconnection of the Tombolo-Pao mini hydro power plant (MHPP) on the stability of the system was analyzed by several scenarios to determine the behavior of system parameters in a 20 kV system interconnection network. This research is an implementation of regulatory provisions relating to the study of the connection to the PLN distribution network through by regulator. Based on the result of simulation study, transient stability of generators at TomboloPao power plant about 0.1 second, will not occur with network configuration according to modeling activation of anti-islanding protection of Tombolo Pao Power Plant which is set by 2 second. The simulation results show that the location of the disturbance in the electric power system has been influenced by the behavior of the power plant (synchronous generator) which can lead to the instability of the micro-hydro connected to the micro-grid system 20 kV.

scholarly journals Manufacturing and Recycling Impact on Environmental Life Cycle Assessment of Innovative Wind Power Plant Part 2/2

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 204
Author(s):  
Patrycja Bałdowska-Witos ◽  
Krzysztof Doerffer ◽  
Michał Pysz ◽  
Piotr Doerffer ◽  
Andrzej Tomporowski ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Power Plant ◽  
Wind Turbine ◽  
Wind Power ◽  
Planning Process ◽  
Negative Impact ◽  
Polymer Materials ◽  
Wind Power Plant ◽  
The Impact

The process of conversion of wind kinetic energy into electricity in innovative wind power plant emits practically no harmful substances into the environment. However, the production stage of its components requires a lot of energy and materials. The biggest problem during production planning process of an innovative wind power plant is selection of materials and technologies and, consequently, the waste generated at this stage. Therefore, the aim of this publication was to conduct an environmental analysis of the life cycle of elements of a wind turbine by means of life cycle assessment (LCA) method. The object of the research was a wind power plant divided into five sets of components (tower, turbine structure, rotors, generators, and instrumentation), made mainly of steel and small amounts of polymer materials. Eco-indicator 99 was used as an analytical procedure. The impact of the subjects of analysis on human health, ecosystem quality and resources was assessed. Among the analyzed components, the highest level of negative impact on the environment was characterized by the life cycle of the wind turbine tower. The application of recycling processes is reducing the negative impact on the environment in the perspective of the entire life cycle of all studied elements of the wind power plant construction.

scholarly journals Establishing the approach to sustainability assessment of a coal mining company’s activity

2020 ◽  
Vol 13 (4) ◽  
pp. 541-549
Author(s):  
A. V. Velikoselskiy ◽  
Yu. A. Kluchnikova
Keyword(s):  
Coal Mining ◽  
Sustainability Assessment ◽  
Stable Operation ◽  
Main Task ◽  
Stability Coefficient ◽  
Assessment Index ◽  
Complex Approach ◽  
Set Up ◽  
The Stability ◽  
The Impact

High competition in the existing coal mining market has set up new landmarks in companies’ performance. Maintaining steady development of a coal mining business is the main task at all managerial levels and is supported by high sustainability level. A company’s ability to preserve stability is one of the key factors revealing stable development of a coal mining business. The need for establishing a system of a company’s sustainability indicators is determined by the necessity to estimate the company’s performance more accurately and in accordance with the objectives set. The authors of the article suggest a new complex approach to estimating a coal mining company’s sustainability. It is based on preserving stable operation under the influence of outer and inner risks. The authors explain the impact of various technical and economic indexes on a company’s activity, suggest formulas for calculating the assessment index – stability coefficient, define the limits for three areas by the value of the stability coefficient and the degree of risk elimination, calculate the sustainability of the company’s operation basing on the indicators’ actual values and the actions taken to eliminate risks per year. The approach suggested can become one of universal tools for analysis and assessment of current operation as well as for the medium-term planning. It can also be used in any coal mining company. The novelty of the approach is determined by the combination of traditional financial and economic analysis and the approach based on application of risk management system.

scholarly journals STABILITY OF THE RUSSIAN BANKING SECTOR: TRENDS AND RISKS

2021 ◽  
pp. 10-19
Author(s):  
E.V. Travkina ◽  
Keyword(s):  
Commercial Bank ◽  
Banking Sector ◽  
System Analysis ◽  
Negative Impact ◽  
Banking System ◽  
Qualitative Assessment ◽  
The Stability ◽  
Procedural Components ◽  
Statistical Survey ◽  
The Impact

In the modern conditions of functioning of the banking system, the issues that arise with the assess¬ment of the stability of a commercial bank individually and the banking sector as a whole in connection with the aggravation of the negative impact of many risk-forming factors associated with the manifestation of the pandemic are updated. In this regard, a comprehensive systematization of the existing Russian and international practice of implementing a qualitative assessment of the stability of banking organizations becomes important. The purpose of the study is to identify trends in the development of the Russian banking sector and the manifestations of banking risks that have a negative impact on its stability, as well as to identify practical opportunities to reduce the impact of these risks. The following general scientific and special methods were chosen as scientific tools for conducting this study: the method of system analysis, the method of retrospective analysis, as well as the methods of statistical survey. The information base of the study was the statistical data of the Bank of Russia. The theoretical and meth¬odological basis of the study was the works of such researchers as Fetisov G. G., Lavrushin O. I., Tarkhanov E. A., Muraviev A. K. Ovchinnikov O. P., Betz A. Yu., Peresetsky A. A. Kromonov V. S., etc. The study is based on the basic definitions of the stability of banking organizations and the regulatory framework for assessing the stability of the Russian commercial bank, as well as methods, mechanisms and procedural components for assessing the stability of the Russian banking sector. The results of the study are aimed at identifying trends and risks that affect the stability of both the Russian banking system as a whole and individual commercial banks. As practical recom¬mendations, the directions for further sustainable development of the Russian banking sector in the context of the negative impact of the pandemic on the national economy are presented.

scholarly journals Impact of COVID-19 on the Performance and Stability of Conventional and Islamic Banks in the GCC Region, Malaysia, and Pakistan

2021 ◽  
Vol 8 (1) ◽  
pp. 25-37
Author(s):  
Qazi Yasir Arafat ◽  
Abdul Rashid ◽  
Qazi Waseem Jan
Keyword(s):  
Negative Impact ◽  
Islamic Banks ◽  
Return On Assets ◽  
Return On Equity ◽  
Quarterly Data ◽  
Z Scores ◽  
Conventional Banks ◽  
The Stability ◽  
The Impact ◽  
Conventional And Islamic Banks

This study examines the impact of COVID-19 on the performance and stability of conventional and Islamic banks. The sample included all the 21 listed Islamic banks (IBs) and 44 listed conventional banks (CBs) from the GCC region, Malaysia, and Pakistan. Quarterly data of these banks covering the period January 2019 to June 2020 were obtained from their quarterly reports. Performance was measured by return on assets (ROA) and return on equity (ROE), while stability was measured by the Z-scores of these banks. Based on the previous literature, a better performance of IBs was expected because these banks are based on the participatory mode of financing instead of debt-based financing. However, the results of the current study showed a significant and negative impact of COVID-19 on the financial performance of both types of banks, suggesting that either type of banking was significantly affected during the pandemic. However, we did not find any significant evidence of the impact of COVID-19 on the stability of these banks.

scholarly journals How We Predict the Stability of Financial Sector: The Conditional Value at Risk Technique Approach

2020 ◽  
Author(s):  
David Kaluge
Keyword(s):  
At Risk ◽  
Systemic Risk ◽  
Value At Risk ◽  
Negative Impact ◽  
Stock Exchange ◽  
Banking System ◽  
Conditional Value At Risk ◽  
Negative Contribution ◽  
The Stability ◽  
The Impact

This study aims to identify the level of systemic risk of each bank and the financial linkages between banks in Indonesia. In this study, researcher uses 41 banks that have been actively traded on the Indonesia Stock Exchange in the period 2013-2018. The data of stock capitalization of banks are used as prices in a portfolio of banking system. The method used in this study is the CVaR (Conditional Value at Risk) method which was introduced by Adrian and Brunerrmeir in 2008. The equilibrium of the system is assumed reached at optimum portfolio of the system. At this situation each bank contribution to systemic risk is analyzed, as well as its impact onto it when there is a change in capitalization of a certain bank. The result shows the impact of bank onto systemic risk is not always follow its size in contribution the systemic risk. Due to covariance’s among banks are some positive and others are negative, some banks have negative contribution to systemic risk while others’ are positive. There are 4 banks that have different behavior. These banks have negative contribution to the systemic risk. These banks are BMRI, PNBN, PNBS and NAGA. The negative impact to systemic risk is dominated by BMRI as much as -0.17%, and by PNBN as much as -0.04%. There are 2 major banks that have contribution to systemic risk; BBCA (3,01% or Rp 59,1 trillion) and BBRI (0,54% Rp 10,62 trillion). However their impact on systemic risk are different. The parameters of impact on systemic for BBCA and BBRI are 14,99% and 52,94% respectively. Thus the stability of the system is more sensitive to the volatility of Bank Rakyat Indonesia (BBRI) than of Bank Central Asia (BBCA). Keywords: Systemic Risk, Financial Linkage, Value at Risk, Conditional Value at Risk, covariance banking

Reduction of Anthropogenic Impact of Alumina Sludge Storage on the Environment

2020 ◽  
Vol 24 (2) ◽  
pp. 4-9 ◽  
Author(s):  
I.I. Shepelev ◽  
A.M. Nemerov ◽  
E.N. Eskova ◽  
E.I. Zhukov ◽  
A.Yu. Sochaczew ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Negative Impact ◽  
Alkaline Reaction ◽  
The Stability ◽  
Environmental Events ◽  
Favorable Conditions ◽  
Technical Solutions ◽  
The Impact ◽  
Artificial Water ◽  
Qualitative Changes

To reduce the impact of alumina sludge storage on the environment, a number of environmental technical solutions have been tested and implemented. Laying a polymeric film on a bed slurry maps and the construction of artificial water level decrease led to the absence of anthropogenic interference, and created favorable conditions for ensuring the stability of the ecological system in the area adjacent to the sludge storage. After the implementation of the environmental events area negative impact of sludge decreased to 150–200 m from the contour of the slurry of the map, outside this zone there are qualitative changes in the chemical composition of groundwater, the alkaline reaction of the environment decreases less than 8.0 units, chemical composition of groundwater is virtually the same background.

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