scholarly journals The Use of Black-Box Optimization Method for Determination of the Bus Connection Capacity in Electric Power Grid

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 41
Author(s):  
Andrzej Wędzik ◽  
Tomasz Siewierski ◽  
Michał Szypowski
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Power Grid ◽  
Optimization Method ◽  
Black Box ◽  
Power Grids ◽  
Good Convergence ◽  
Electric Power Grid ◽  
New Energy ◽  
System Calculation

One of the main tasks of the Power System Operators is to ensure a proper, safe, and trouble-free operation and development of power grids. Growth of power system is inseparably linked to a connection of both renewable and classical new energy sources. For network operators and potential investors, it is essential to know the place and volume of generation capacity that can be connected to the grid. A publication of such data is currently a legal obligation for many operators. This paper proposes a method of determining the bus connection capacity in power grid of any type with the use of black-box optimization. Calculations and analyses were performed with a full, nonlinear model of the analyzed network. Obtained results show the effectiveness of this method for both single and multiple nodes in any configuration. All the constraints relevant for the proper and safe system operation, such as bus voltages, line loads, and short-circuit currents, both in a steady-state and (n-1) contingency states, are taken into consideration. Calculations confirmed the good convergence and repeatability of the method for all three tested computational algorithms. This has also confirmed the possibility of use of open source software to extend the functionality of Siemens PSS®E commercial power system calculation software.

scholarly journals Modelling of an Electric Power Grid for New Power Plant Evacuation

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Sunday Adetona ◽  
Emenike Ugwuagbo ◽  
Frank Okafor ◽  
Tolulope Akinbulire
Keyword(s):  
Power Plant ◽  
Power System ◽  
Electric Power ◽  
Transient Stability ◽  
Short Circuit ◽  
Power Grid ◽  
Load Flow ◽  
System Stability ◽  
System Component ◽  
Electric Power Grid

Injection of a new power system component into an existing power grid often cause change in the behaviour of the power grid to which it is injected. Therefore, forecasting possible unsafe condition(s) of the power grid using an efficient power study tool is essential; and, provision of necessary mitigation actions to ensure a reliable grid is important. This paper, therefore, presents evacuation study of a 400 MW power plant connecting to the 15 GW planned transmission network of the Transmission Company of Nigeria (TCN). The NEPLAN power system analytical software was used in the modelling and simulation of the electric power grid. In the research, load flow, short circuit, transient stability, and contingency analyses were performed on the case study. From the short circuit study, it is observed that if TCN network expansion program is fully implemented, the short circuit level will go beyond the existing switchgear ratings in major substations of the network. However, with the introduction of substation splitting at Omotoso and ongoing Ogijo substations, the short circuit level will be reduced by 15%; leading to improvement in the overall system stability. Keywords—Load flow, short circuit study, transient stability study, and contingency analysis

scholarly journals Research on Hierarchical and Distributed Control for Smart Generation Based on Virtual Wolf Pack Strategy

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Lei Xi ◽  
Lang Liu ◽  
Yuehua Huang ◽  
Yanchun Xu ◽  
Yunning Zhang
Keyword(s):  
Power System ◽  
Distributed Control ◽  
Large Scale ◽  
Frequency Control ◽  
Power Grid ◽  
Load Frequency Control ◽  
Collaborative Control ◽  
New Energy ◽  
Eligibility Trace ◽  
Generation Control

Nowadays, haze has become a big trouble in our society. One of the significant solutions is to introduce renewable energy on a large scale. How to ensure that power system can adapt to the integration and consumption of new energy very well has become a scientific issue. A smart generation control which is called hierarchical and distributed control based on virtual wolf pack strategy is explored in this study. The proposed method is based on multiagent system stochastic consensus game principle. Meanwhile, it is also integrated into the new win-lose judgment criterion and eligibility trace. The simulations, conducted on the modified power system model based on the IEEE two-area load frequency control and Hubei power grid model in China, demonstrate that the proposed method can obtain the optimal collaborative control of AGC units in a given regional power grid. Compared with some smart methods, the proposed one can improve the closed-loop system performances and reduce the carbon emission. Meanwhile, a faster convergence speed and stronger robustness are also achieved.

scholarly journals A Unified Approach for Analysis of Faults in Different Configurations of PV Arrays and Its Impact on Power Grid

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 156 ◽  
Author(s):  
Saba Gul ◽  
Azhar Ul Haq ◽  
Marium Jalal ◽  
Almas Anjum ◽  
Ihsan Ullah Khalil
Keyword(s):  
Thin Film ◽  
Short Circuit ◽  
Power Grid ◽  
Open Circuit ◽  
Fault Analysis ◽  
Operating Conditions ◽  
Power Grids ◽  
Pv System ◽  
Multiple Faults ◽  
The Impact

Fault analysis in photovoltaic (PV) arrays is considered important for improving the safety and efficiency of a PV system. Faults do not only reduce efficiency but are also detrimental to the life span of a system. Output can be greatly affected by PV technology, configuration, and other operating conditions. Thus, it is important to consider the impact of different PV configurations and materials for thorough analysis of faults. This paper presents a detailed investigation of faults including non-uniform shading, open circuit and short circuit in different PV interconnections including Series-Parallel (SP), Honey-Comb (HC) and Total-cross-Tied (TCT). A special case of multiple faults in PV array under non-uniform irradiance is also investigated to analyze their combined impact on considered different PV interconnections. In order to be more comprehensive, we have considered monocrystalline and thin-film PV to analyze faults and their impact on power grids. Simulations are conducted in MATLAB/Simulink, and the obtained results in terms of power(P)–voltage(V) curve are compared and discussed. It is found that utilization of thin-film PV technology with appropriated PV interconnections can minimize the impact of faults on a power grid with improved performance of the system.

Special Protection Schemes: A Survey and Vision for the Future

2016 ◽  
Vol 839 ◽  
pp. 49-53 ◽  
Author(s):  
K. Shafeeque Ahmed ◽  
Shanmugam Prabhakar Karthikeyan ◽  
Sarat Kumar Sahoo
Keyword(s):  
Power System ◽  
Power Grid ◽  
General Structure ◽  
Power Grids ◽  
Human Beings ◽  
Protection Scheme ◽  
System Protection ◽  
System Integrity ◽  
Integrity Protection ◽  
Special Protection

Any power system network is subjected to disturbances at any time and place. It is considered as one of the most stochastic system ever seen by the human beings. To enhance the power system reliability, System Protection Scheme (SPS) is an effective tool for utilizing the power grid during rare contingencies. This method is often employed as secondary protection schemes. SPS is also termed as Special Protection Scheme. SPS is referred with different names by different users such as IEEE as System Integrity Protection Scheme (SIPS), Bonneville Power Administration (BPA) as Remedial Action Scheme (RAS) and WECC and others as SPS. In India, only in late 90s, the concept of SPS was introduced to solve the above problem. In Indian power grid different SPS has been designed and implemented successfully. This paper presents a complete knowledge, need , general structure, characteristics and a brief description of the major SPS employed in various Indian Power grids. Post - commissioning performance of these SPS has also been analyzed briefly. Finally, highlights of major issues involved with the employment of SPS in the Indian scenario.

scholarly journals Robust Control of a PMSG-Based Wind Turbine Generator Using Lyapunov Function

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1712
Author(s):  
Roghayyeh Pourebrahim ◽  
Amin Mohammadpour Shotorbani ◽  
Fausto Pedro García Márquez ◽  
Sajjad Tohidi ◽  
Behnam Mohammadi-Ivatloo
Keyword(s):  
Robust Control ◽  
Wind Turbine ◽  
Parameter Uncertainty ◽  
Short Circuit ◽  
Power Grid ◽  
Synchronous Generator ◽  
Power Grids ◽  
Adaptive Observer ◽  
Turbine Generator ◽  
Wind Turbine Generator

This paper proposes a robust finite-time controller (FTC) for a permanent magnet synchronous generator (PMSG)-based wind turbine generator (WTG). An adaptive observer is used for the rotor angle, rotor speed, and turbine torque estimations of the PMSG, thus eliminating the use of anemometers. The robustness of the proposed FTC regarding parameter uncertainty and the external weak power grid is analyzed. The impacts of the power grid short-circuit ratio (SCR) at the point of common coupling (PCC) on the conventional proportional-integral (PI) controller and the proposed FTC are discussed. Case studies illustrate that the proposed observer-based FTC is able to estimate the mechanical variables accurately and provides robust control for WTGs with parameter uncertainty and weak power grids.

A holistic review on Cyber-Physical Power System (CPPS) testbeds for secure and sustainable electric power grid – Part – I: Background on CPPS and necessity of CPPS testbeds

2022 ◽  
Vol 136 ◽  
pp. 107718
Author(s):  
Rajaa Vikhram Yohanandhan ◽  
Rajvikram Madurai Elavarasan ◽  
Rishi Pugazhendhi ◽  
Manoharan Premkumar ◽  
Lucian Mihet-Popa ◽  
...  
Keyword(s):  
Power System ◽  
Electric Power ◽  
Power Grid ◽  
Electric Power Grid ◽  
Holistic Review

scholarly journals The Application of Artificial Intelligence Technology in Smart Energy

2020 ◽  
Vol 185 ◽  
pp. 01037
Author(s):  
Xiaotao Jiang ◽  
Ming Xin Zhao ◽  
Wei Liu ◽  
Ruo Bing Xu
Keyword(s):  
Artificial Intelligence ◽  
Power System ◽  
Power Flow ◽  
Power Grid ◽  
Operation Mode ◽  
Energy System ◽  
Effective Measure ◽  
New Energy ◽  
Artificial Intelligence Technology ◽  
Grid Operation

At present, the development of energy system tends to be clean and intelligent. China has upgraded the development of smart energy to national strategy. As the core link of energy system, power system is widely used, with strong regulation ability and complex control, especially with the increasing proportion of new energy and various forms of consumption. Now the power system presents the characteristics of complex nonlinearity, strong uncertainty and strong coupling. There are many limitations in traditional modeling, optimization and control technology, and artificial intelligence technology will be an effective measure to solve the control and decision-making problems of complex system. Firstly, this paper analyzes the application prospect of artificial intelligence technology in power system and the application of artificial intelligence technology in power grid operation. It establishes the prediction model of power grid operation mode, the model can help operators of power system quickly adjust the power flow to convergence state, and then greatly improve the calculation efficiency of power grid operation mode.

Shipboard Power System Stabilizer Optimization Using GA and QPSO Algorithm

2017 ◽  
Vol 16 (03) ◽  
pp. 1750015 ◽  
Author(s):  
Wei Zhang ◽  
Weifeng Shi ◽  
Jinbao Zhuo
Keyword(s):  
Diesel Engine ◽  
Power System ◽  
Short Circuit ◽  
Dynamic Performance ◽  
Particle Swarm ◽  
Optimization Method ◽  
Power System Stabilizer ◽  
Shipboard Power System ◽  
Shipboard Power ◽  
System Stabilizer

In order to improve shipboard power system dynamic stability, two bio-inspired algorithms, the genetic algorithm (GA) and quantum-behaved particle swarm optimization (QPSO), method are proposed for the shipboard power system stabilizer (PSS) optimization. The proposed PSS optimization method is inspired by a hybrid-coordinated stabilizer for diesel engine generator and the bio-inspired algorithm. The simulations are conducted under load change disturbance and short-circuit fault case for the marine generator with/without the diesel engine speed governor. Simulation results show that the quantum particle swarm optimize strategy could improve the dynamic performance of the marine generator better than the GA method. The dynamic performance for shipboard power system always indicates the effectiveness, feasibility and robustness of the proposed approach.

scholarly journals Auditory Displays of Electric Power Grids

2018 ◽  
Author(s):  
Patrick Cowden ◽  
Luke Dosiek
Keyword(s):  
Power System ◽  
Electric Power ◽  
Real Time ◽  
Power Grid ◽  
Power Grids ◽  
Musical Note ◽  
Auditory Displays ◽  
Energy Demands ◽  
Electric Power Grids ◽  
And Shifts

This paper presents auditory displays of power grid voltage. Due to the constantly changing energy demands experienced by a power system, the voltage varies slightly about nominal, e.g., 120±2 V at 60±0.04 Hz. These variations are small enough that any audible effects, such as transformer hum, appear to have constant volume and pitch. Here, an audification technique is derived that amplifies the voltage variations and shifts the nominal frequency from 60 Hz to a common musical note. Sonification techniques are presented that map the voltage magnitude and frequency to MIDI velocity and pitch, and create a sampler trigger from frequency deviation. Several examples, including audio samples, are given under a variety of power system conditions. These results culminate in a multi-instrument track generated from the sonification of time-synchronized geographically widespread power grid measurements. In addition, an inexpensive Arduino-based device is detailed that allows for real-time sonification of wall outlet voltage.

scholarly journals Electric Power-grid Friendly Characteristic Data Center Energy Consumption Optimization Method

2021 ◽  
Vol 2095 (1) ◽  
pp. 012026
Author(s):  
Tianhang Huang ◽  
Tianyi Zhai ◽  
Xin Zhang ◽  
Xiaomeng Di
Keyword(s):  
Energy Consumption ◽  
Electric Power ◽  
Data Center ◽  
High Efficiency ◽  
Power Grid ◽  
Optimization Method ◽  
Load Demand ◽  
Characteristic Data ◽  
Electric Power Grid ◽  
Energy Consumption Optimization

Abstract With the acceleration of the digitization process, the load of the data center on the power grid continues to increase. During the operation of the data center, the load demand on the power grid is relatively large, and the load demand on the power grid fluctuates greatly. In the Power industry, the average PUE(power usage effectiveness) of data center is above 2, which is extremely unfriendly to the power grid. This paper proposes and summarizes the optimization parameters at various levels, the energy efficiency of software and hardware, and provides a method for optimization through global variables for high-efficiency and energyconsuming data centers, which can minimize cooling energy consumption and IT energy consumption. To build a electric power grid-friendly characteristic data center with high efficiency and low energy consumption.

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