Attacks on smart grid: power supply interruption and malicious power generation

2019 ◽  
Vol 19 (2) ◽  
pp. 189-211
Author(s):  
Sridhar Adepu ◽  
Nandha Kumar Kandasamy ◽  
Jianying Zhou ◽  
Aditya Mathur
Keyword(s):  
Power Generation ◽  
Smart Grid ◽  
Power Supply ◽  
Supply Interruption

scholarly journals Smart Grid Dispatching Optimization for System Resilience Improvement

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Li Liao ◽  
Chengjun Ji
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Smart Grid ◽  
Objective Function ◽  
Real Time ◽  
Power Supply ◽  
Optimization Model ◽  
Collaborative Optimization ◽  
The Real ◽  
The Cost

A large number of modern communication technologies and sensing technologies are incorporated into the smart grid, which makes its structure unique. The centralized optimized dispatch method of traditional power grids is difficult to achieve effective dispatch of smart grids. Based on the analysis of power generation plan and maintenance plan optimization model, this paper establishes a smart grid power generation and maintenance collaborative optimization model with distributed renewable energy. The objective function of this collaborative optimization problem is the operating cost of conventional units, the cost of wind power generation, and the cost of overhauling units; the constraints considered mainly include system constraints and overhaul constraints. The solution method of combinatorial optimization is analyzed, and the genetic optimization algorithm adopted in this paper is selected and discussed. According to the characteristics of the system, various loads are modeled, and power supply constraints are considered. By establishing an effective objective function, the adjustable load scheduling problem is transformed into a solvable optimal control problem. Taking into account the uncertain factors in the system, the advantage of the real-time control system is that it can realize the dynamic update scheduling of the load, so it is more in line with the requirements of the actual system. The real-time algorithm proposed in the paper is based on a distributed control strategy, which can not only realize dynamic compensation for random fluctuations in renewable energy power generation but also satisfy the load curve optimization under the premise of making full use of power supply resources. In addition, simulation experiments compare the load dispatching capabilities of the proposed algorithm with the existing algorithms, thereby verifying the performance of the proposed method.

scholarly journals Hybrid bypass technique to mitigate leakage current in the grid-tied inverter

2022 ◽  
Vol 12 (1) ◽  
pp. 131
Author(s):  
Geetha Kamurthy ◽  
Sreenivasappa Bhupasandra Veeranna
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Smart Grid ◽  
Leakage Current ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Good Efficiency ◽  
Distributed Power ◽  
Distributed Power Generation ◽  
Bypass Technique

The extensive use of fossil fuel is destroying the balance of nature that could lead to many problems in the forthcoming era. Renewable energy resources are a ray of hope to avoid possible destruction. Smart grid and distributed power generation systems are now mainly built with the help of renewable energy resources. The integration of renewable energy production system with the smart grid and distributed power generation is facing many challenges that include addressing the issue of isolation and power quality. This paper presents a new approach to address the aforementioned issues by proposing a hybrid bypass technique concept to improve the overall performance of the grid-tied inverter in solar power generation. The topology with the proposed technique is presented using traditional H5, oH5 and H6 inverter. Comparison of topologies with literature is carried out to check the feasibility of the method proposed. It is found that the leakage current of all the proposed inverters is 9 mA and total harmonic distortion is almost about 2%. The proposed topology has good efficiency, common mode and differential mode characteristics.

scholarly journals Smart Grid Nontechnical Loss Detection Based on Power Gateway Consortium Blockchain

2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Xudong He ◽  
Jian Wang ◽  
Jiqiang Liu ◽  
Enze Yuan ◽  
Kailun Wang ◽  
...  
Keyword(s):  
Smart Grid ◽  
Power Supply ◽  
Rapid Development ◽  
Good Effect ◽  
Smart Meter ◽  
Human Beings ◽  
Labor Costs ◽  
Time Consumption ◽  
Decentralized Management ◽  
Supply Capacity

The rapid development of the smart grid brings convenience to human beings. It enables users to know the real-time power supply capacity, the power quality, and the electricity price fluctuation of the grid. However, there are still some threats in the smart grid, which increase all kinds of expenses in the grid and cause great trouble to energy distribution. Among them, the man-made nontechnical loss (NTL) problem is particularly prominent. Recently, there are also some NTL detection programs. However, most of the schemes need huge amounts of supporting data and high labor costs. As a result, the NTL problem has not been well solved. In order to better avoid these risks, problems such as tampering of smart meter energy data, bypassing the smart meter directly connected to the grid, and imbalance between revenue and expenditure of the smart grid are tackled, and the threat scene of NTL is constructed. A hierarchical grid gateway blockchain is proposed and designed, and a new decentralized management MDMS system is constructed. The intelligent contract combined with the elliptic curve encryption technology is used to detect the storage and the acquisition of power data, and the detection of NTL problems is realized. At the same time, it has a certain ability to resist attacks such as replay, monitoring, and tampering. We tested the time consumption and throughput of this method on Hyperledger Fabric. At the same time, eight indexes of other methods proposed in the literature are compared. This method has a good effect.

scholarly journals Weight Feedback Adaptive Multi Objective Cooperative Scheduling in Smart Grid Application

2019 ◽  
Vol 8 (2) ◽  
pp. 607-611
Keyword(s):  
Smart Grid ◽  
Power Supply ◽  
Smart Grids ◽  
Grid Integration ◽  
Multi Objective ◽  
Monitoring Model ◽  
Power Scheduling ◽  
Grid Interface ◽  
Feedback Scheduling ◽  
Cooperative Scheduling

Smart grid integration needs a highly accurate power scheduling to minimizes the losses and efficiently utilize the power supply to minimize the loss. Scheduling of a smart grid interface is monitored based on single or multiple objectives scheduler, where the smart grids are scheduled based on the measured parameters of power dispatch and the consumption model. Wherein, multi objective scheduling results in prominent result, the system is a linear monitoring model, where no previous observations are considered in making present decision. This constraint the accuracy of scheduling. In this paper, a new feedback scheduling operation based on feedback operation is proposed. the approach significantly feedbacks the past parameter variation and leads to an optimal power supply in smart grid interface. The experimental results obtained signifies a optimal improvement in the decision delay and power compensation.

The Integrated Evaluation Index of Energy-Saving and Emission Reduction Generation Dispatching

2011 ◽  
Vol 382 ◽  
pp. 56-59
Author(s):  
Yong Hua Li ◽  
Jun Wang ◽  
Wei Ping Yan
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Power Supply ◽  
Coal Combustion ◽  
Emission Reduction ◽  
Evaluation System ◽  
Power Plants ◽  
Consumption Rate ◽  
Coal Consumption ◽  
Reduction Effect

In China, coal combustion to generate electric power is the primary method, the energy-saving and emission reduction is the urgent task. At present, the energy-saving dispatching trial method in some area evaluates energy-saving and emission reduction of coal combustion power generation according to power supply coal consumption rate only. But the power supply coal consumption rate can’t reflect the energy-saving and emission reduction effect of coal combustion power plant overall. For example, the same coal combustion unit, the coal consumption rate is difference when desulfuration system is operating or not; the coal consumption rate of the unit with SCR will be increased; the coal consumption rate of the air-cooled unit is higher than water-cooled unit; etc.. This paper considers synthetically coal consumption rate, pollution emission, water resource wastage, etc., establishes a integrated evaluation system, adopts factor analysis method, gets the integrated evaluation system and index of energy-saving and emission reduction of coal combustion power generation, evaluates energy-saving and emission reduction effect of 5 power plants reasonable. The results show that the index can reflect the energy-saving and emission reduction level of coal combustion power generation.

Captive Power Generation : What are the Economics ?

1987 ◽  
Vol 12 (2) ◽  
pp. 47-56 ◽  
Author(s):  
V Ranganathan ◽  
Damodar Mall
Keyword(s):  
Power Generation ◽  
Power Supply ◽  
Power Plants ◽  
Power Cost ◽  
Reliable Power Supply ◽  
Power Costs

Galloping demand for power and mounting constraints in its generation have forced electricity boards all over the country to impose power cuts. User industries have been forced to go for captive power plants to tide over the situation. In this article, V Ranganathan and Damodar Mall compare captive power and grid power costs in Karnataka. At the observed low utilization of between 6 and 20 per cent, captive power cost is Rs 1.95 while grid power cost is only 31 paise per KWH. The authors argue that the user industries should pursue the options of cooperative generation of power or become a financing partner with the electricity boards for assured and reliable power supply.

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