Evaluation of Protective Relaying Reliability in Renewable Energy Environment

2017 ◽  
Vol 8 (2) ◽  
pp. 407
Author(s):  
Z. Hisham ◽  
H. Hashim ◽  
Z. Shukri ◽  
Z. Ishak
Keyword(s):  
Renewable Energy ◽  
Power Transmission ◽  
Short Circuit ◽  
Distance Protection ◽  
Protective Relaying ◽  
Power Sources ◽  
New Energy ◽  
Energy Environment ◽  
The Impact ◽  
Protection Engineering

<p>The decrement in supply of fossil fuel led to the exploration of new energy sources, which varies from wind energy to solar energy, which are known as Renewable Energy. The main problem with these power sources are the inconsistency of their energy that depends very much on the environmental factors. The embedment of these power sources onto conventional power transmission network would affect the sensitivity and reliability of protective relaying. Two different types of solar power plant connection to power system network are presented in this paper, namely Bus Connection and T-Off Connection. Computer Aided Protection Engineering (CAPE) software is used to model the networks being protected by distance protection, and simulate short circuit scenario. This paper specifically focuses on evaluating the impact of the in-feed current being contributed by both network configurations to the reliability of distance protection.</p>

scholarly journals Modeling for Development of Simulation Tool: Impact of TCSC on Apparent Impedance Seen by Distance Relay

2018 ◽  
Vol 8 (5) ◽  
pp. 3332-3337
Author(s):  
N. M. Khoa ◽  
D. D. Tung
Keyword(s):  
Transmission Line ◽  
Power Transmission ◽  
Short Circuit ◽  
Simulation Software ◽  
Voltage Source ◽  
Power Transmission Line ◽  
Distance Protection ◽  
Protection Relay ◽  
The Impact ◽  
Distance Protection Relay

The impact of thyristor controlled series capacitor (TCSC) on distance protection relays in transmission lines is analyzed in this paper. Voltage and current data are measured and collected at the relay locations to calculate the apparent impedance seen by distance protection relays in the different operating modes of the TCSC connected to the line. Short-circuit faults which occur at different locations on the power transmission line are considered in order to locate the fault for the purpose of evaluating the impact of TCSC on the distance protection relay. Matlab/Simulink simulation software is used to model the power transmission line with two sources at the two ends. Voltage source, transmission line, TCSC, voltage and current measurement, and discrete Fourier transform (DFT) blocks are integrated into the model. Simulation results show the impact of TCSC on the distance protection relay and determine the apparent impedance and fault location in the line.

scholarly journals Research on New Energy High-rate Dissipation Strategy under the Background of Renewable Energy Quota System

2019 ◽  
Vol 118 ◽  
pp. 01037
Author(s):  
Daqiang Xiao ◽  
Dunnan Liu ◽  
Ruixing Yang ◽  
Xiongfei Wang
Keyword(s):  
Renewable Energy ◽  
Energy Consumption ◽  
Power Transmission ◽  
High Rate ◽  
Transmission Curve ◽  
Energy Potential ◽  
Quota System ◽  
New Energy ◽  
Consumption Situation ◽  
The Impact

In recent years, China’s new energy has developed rapidly, and at the same time there have been serious problems of abandoning wind and abandoning light. In order to better solve the problem of new energy consumption, China officially implemented the renewable energy quota system in January 2019. Therefore, based on the current situation of new energy consumption in China, this paper first analyzes the impact of renewable energy quota policy from two aspects: capacity efficiency and grid connectivity effect, and then based on tapping local energy potential, accepting trans-regional power transmission, and optimizing outside the region. The corresponding new energy consumption strategy is proposed in the power transmission curve. Finally, based on the time series production simulation model, an empirical analysis is made on the consumption situation of a certain provincial power grid under different strategies in 2020. This paper provides a reference for promoting the proportion of new energy consumption in China.

scholarly journals Powering Multiple Gas Condensate Wells in Russia’s Arctic: Power Supply Systems Based on Renewable Energy Sources

Resources ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 130
Author(s):  
Gennadiy Stroykov ◽  
Alexey Y. Cherepovitsyn ◽  
Elizaveta A. Iamshchikova
Keyword(s):  
Renewable Energy ◽  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Renewable Energy Sources ◽  
Operating Conditions ◽  
Gas Condensate ◽  
The Arctic ◽  
Power Transmission Lines ◽  
Power Sources

Using renewable energy off-grid power supply and choosing the right equipment that meets the operating conditions in the Arctic can provide companies with reliable power sources for producing gas at facilities located in remote areas and will reduce capital and operating costs associated with the construction of power transmission lines. For more than 15 years, a remote control system powered by renewable energy has been used in parallel with power transmission lines by Gazprom to operate its multiwell pads in Russia’s Far North, which validates the relevance of this study. The subject of the study is a group of gas condensate wells that consists of four multiwell pads operated by Wintershall Russland GmbH. The article discusses a stand-alone renewable-based power system as an option for powering remote oil and gas production facilities. The procedures used in the study include calculating such parameters as power output and power consumption, choosing equipment, describing the design features of a power supply system for a multiwell pad, conducting an economic assessment of the project, comparing different power supply options, analyzing project risks, and developing measures to mitigate these risks.

scholarly journals Environmental and social issues on energy policy in indonesia

2018 ◽  
Vol 73 ◽  
pp. 02002
Author(s):  
Sudharto Prawata Hadi ◽  
Bulan Prabawani ◽  
Hartuti Purnaweni
Keyword(s):  
Climate Change ◽  
Mineral Resource ◽  
Renewable Energy ◽  
Social Issues ◽  
Secondary Data ◽  
Energy System ◽  
Fossil Energy ◽  
Crucial Problem ◽  
New Energy ◽  
The Impact

One crucial problem faced by Indonesia is the dependence on fossil energy reaching to 93,3%, while the share of renewable energy is only 7,7%. This causes two implications. Firstly, Indonesia is at the situation of insecurity energy due to the limitation of the availability of fossil energy. Since 2004, Indonesia is net importer oil country. Secondly, the use of fossil energy creates CO2, a component of green house gases stimulating global warming and climate change. One strategy to deal with this problem is by implementing new energy system consisting of developing renewable energy and energy efficiency. This paper observes the impact of the use of fossil energy, the measures taken to deal with these problems and the issues of implementing the measures. This research relies on secondary data available at the Ministry of Energy and Mineral Resource, Ministry of Environment and Forestry specifically at by Proper Secretariat, and other relevant sources.

scholarly journals A New Energy Management Technique for PV/Wind/Grid Renewable Energy System

2015 ◽  
Vol 2015 ◽  
pp. 1-19 ◽  
Author(s):  
Onur Ozdal Mengi ◽  
Ismail Hakki Altas
Keyword(s):  
Renewable Energy ◽  
Energy Management ◽  
Management System ◽  
Energy System ◽  
Management Technique ◽  
Solar Panels ◽  
Power Requirement ◽  
Power Sources ◽  
Power Bus ◽  
New Energy

An intelligent energy management system (IEMS) for maintaining the energy sustainability in renewable energy systems (RES) is introduced here. It consists of wind and photovoltaic (PV) solar panels are established and used to test the proposed IEMS. Since the wind and solar sources are not reliable in terms of sustainability and power quality, a management system is required for supplying the load power demand. The power generated by RES is collected on a common DC bus as a renewable green power pool to be used for supplying power to loads. The renewable DC power bus is operated in a way that there is always a base power available for permanent loads. Then the additional power requirement is supplied from either wind or PV or both depending upon the availability of these power sources. The decision about operating these systems is given by an IEMS with fuzzy logic decision maker proposed in this study. Using the generated and required power information from the wind/PV and load sides, the fuzzy reasoning based IEMS determines the amount of power to be supplied from each or both sources. Besides, the IEMS tracks the maximum power operating point of the wind energy system.

scholarly journals Smart-Grid-Aware Load Regulation of Multiple Datacenters towards the Variable Generation of Renewable Energy

2019 ◽  
Vol 9 (3) ◽  
pp. 518 ◽  
Author(s):  
Peicong Luo ◽  
Xiaoying Wang ◽  
Hailong Jin ◽  
Yuling Li ◽  
Xuejiao Yang
Keyword(s):  
Renewable Energy ◽  
Smart Grid ◽  
Energy Input ◽  
Large Scale ◽  
Weather Conditions ◽  
Clean Energy ◽  
High Energy ◽  
Stochastic Algorithm ◽  
Power Sources ◽  
The Impact

Recently, as renewable and distributed power sources boost, many such resources are integrated into the smart grid as a clean energy input. However, since the generation of renewable energy is intermittent and unstable, the smart grid needs to regulate the load to maintain stability after integrating the renewable energy source. At the same time, with the development of cloud computing, large-scale datacenters are becoming potentially controllable loads for the smart grid due to their high energy consumption. In this paper, we propose an appropriate approach to dynamically adjust the datacenter load to balance the unstable renewable energy input into the grid. This could meet the demand response requirements by taking advantage of the variable power consumption of datacenters. We have examined the scenarios of one or more datacenters being integrated into the grid and adopted a stochastic algorithm to solve the problem we established. The experimental results illustrated that the dynamic load management of multiple datacenters could help the smart grid to reduce losses and thus save operational costs. Besides, we also analyzed the impact of the flexibility and the delay of datacenter actions, which could be applied to more general scenarios in realistic environments. Furthermore, considering the impact of the action delay, we employed a forecasting method to predict renewable energy generation in advance to eliminate the extra losses brought by the delay as much as possible. By predicting solar power generation, the improved results showed that the proposed method was effective and feasible under both sunny and cloudy/rainy/snowy weather conditions.

scholarly journals Allocation of 0.4 kV PTL Sectionalizing Units under Criteria of Sensitivity Limits and Power Supply Reliability

2021 ◽  
Vol 11 (24) ◽  
pp. 11608
Author(s):  
Alina Vinogradova ◽  
Alexander Vinogradov ◽  
Vadim Bolshev ◽  
Andrey Izmailov ◽  
Alexey Dorokhov ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Short Circuit ◽  
Reducing Power ◽  
Power Transmission Lines ◽  
Electrical Networks ◽  
The Cost ◽  
The Impact ◽  
Supply Reliability

Sectionalizing 0.4 kV power transmission lines (PTL) improves power supply reliability and reduces electricity undersupply through the prevention of energy disconnection of consumers in the event of a short circuit in the power line behind the sectionalizing unit (SU). This research examines the impact of sectionalizing on power supply reliability and reviews the literature on sectionalizing unit allocation strategies in electrical networks. This paper describes the experience of the use of sectionalizing units with listing strengths and weaknesses of adopted technical solutions and describes the new structure of sectionalizing units. A new methodology is proposed, whereby there are two criteria for allocating SU in 0.4 kV power transmission lines. The first criterion is the sensitivity limits against single-phase short circuits used for calculating the maximum distance at which SU can be installed. The second criterion is power supply reliability improvement, evaluating the cost-effectiveness of installing sectionalizing equipment by reducing power supply outage time. The established methodology was put to the test on an actual electrical system (Mezenka village, Orel area, Russia), which demonstrated that the installation of a sectionalizing unit paid off.

scholarly journals State-of-the-Art Review of Positive Energy Building and Community Systems

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5046
Author(s):  
Gokula Manikandan Senthil Kumar ◽  
Sunliang Cao
Keyword(s):  
Renewable Energy ◽  
State Of The Art ◽  
Energy Systems ◽  
Energy System ◽  
Positive Energy ◽  
Zero Energy ◽  
New Energy ◽  
Economic Perspectives ◽  
The Impact ◽  
Zero Energy Buildings

A positive energy system that produces more renewable energy than its demand while ensuring appropriate comfort levels is an excellent path towards increasing the portion of renewable energy, reducing carbon emission, and increasing the energy system’s overall performance. In particular, it has been believed as step forward towards zero energy systems. Recent progress in positive energy building and community levels is gaining interest among different stakeholders. However, an inadequate understanding of the positive energy system is widely noticed in many projects, and a shortage of standard details on the positive energy system still prevails in the research community. Therefore, a state-of-the-art review of positive energy building and community is conducted in this paper. Firstly, this paper begins with the definitions and concepts of positive energy buildings and communities. Secondly, it comprehensively describes the energy supplies, demands, indicators, storage, energy management, roles of stakeholders, and bottlenecks of positive energy systems. Thirdly, the main differences between positive energy buildings and communities are summarized. Fourthly, the impact of smart energy grids and new energy vehicles on the positive energy buildings and communities is derived. As a conclusion, this paper shows that even though all the energy-efficient buildings such as passive buildings, nearly zero energy buildings, zero energy buildings, positive energy buildings look like an up-trending scale of renewable penetration, considerable differences are visible among all, and the same thing applies to the community level. Furthermore, considerable differences exist when comparing between positive buildings and communities regarding both the technical and economic perspectives.

Assessing the Impacts of Inter-Regional Power Transmissions on Energy Structure in China’s Power Sector

2014 ◽  
Vol 962-965 ◽  
pp. 1757-1761
Author(s):  
Jie Zhao ◽  
Can Wang ◽  
Min Hua Ye
Keyword(s):  
Renewable Energy ◽  
Energy Use ◽  
Optimal Allocation ◽  
Power Transmission ◽  
Thermal Power ◽  
Energy Structure ◽  
Regional Power ◽  
Power Sector ◽  
Regional Energy ◽  
The Impact

Ultra-high voltage (UHV) inter-regional power transmissions not only can upgrade the optimal allocation ability of electricity energy in a wider range, but also can link the renewable energy power plant center and electricity load center. We use a bottom-up optimization model based on six regional power grids to simulate the impact of inter-regional transmission on energy structure in china’s power sector. The result shows that it maybe not has the positive effect as we had expected, the main consequence of the inter-regional power transmission is the thermal power generation migration among different regions, which has no significant effect on promoting renewable energy in the absence of other incentive policies. As a new form of inter-regional energy deployment, UHV inter-regional power transmission will change our future regional energy use, as well as air emissions, greenhouse gas emissions and other development path, so we also put SO2, NOx and CO2 emission control into consideration.

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