scholarly journals Inertia Estimation of Wind Power Plants Based on the Swing Equation and Phasor Measurement Units

2018 ◽  
Vol 8 (12) ◽  
pp. 2413 ◽  
Author(s):  
Omar Beltran ◽  
Rafael Peña ◽  
Juan Segundo ◽  
Aaron Esparza ◽  
Eduard Muljadi ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Wind Power ◽  
Power Plants ◽  
Frequency Stability ◽  
Phasor Measurement Units ◽  
Wind Power Plants ◽  
Phasor Measurement ◽  
Measurement Units ◽  
Swing Equation

High penetration of wind power plants may have an adverse impact on power systems’ stability by reducing the inertia, and problems like frequency stability could appear due to total inertia in the system being reduced, making the power system more vulnerable to disturbances. However, most recent grid codes include an emulation inertia requirement for wind power plants, because modern wind turbines are capable of providing virtual inertia through power electronic converter controls to improve frequency stability issues. Because of this, it is necessary that the inertia estimation analyze and quantify the impact of the inertia reduction in power systems. In this paper, an implementation of a methodology for the inertia estimation of wind power plants is presented. It is evaluated through synchrophasor measurements obtained from a Real-Time Digital Simulator (RTDS) implementation, using industrial Phasor Measurement Units (PMUs). This methodology is based on the swing equation. Furthermore, a comparison of the results obtained between two professional tools RSCAD and DIgSILENT PowerFactory is performed, in order to evaluate the accuracy and the robustness of the methodology. This methodology is applied for the inertia estimation of an equivalent of the southeast zone of the Mexican power system, where there is a large-scale penetration of wind power plants. The results demonstrate that this methodology can be applied in real power systems using PMUs.

scholarly journals Wind Inertial Response Based on the Center of Inertia Frequency of a Control Area

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6177
Author(s):  
Alija Mujcinagic ◽  
Mirza Kusljugic ◽  
Emir Nukic
Keyword(s):  
Power System ◽  
Wind Power ◽  
Power Plants ◽  
Frequency Stability ◽  
Control Area ◽  
Rotational Inertia ◽  
Wind Power Plants ◽  
Inertial Response ◽  
Virtual Inertia ◽  
Inertia Response

As a result of the increased integration of power converter-connected variable speed wind generators (VSWG), which do not provide rotational inertia, concerns about the frequency stability of interconnected power systems permanently arise. If the inertia of a power system is insufficient, wind power plants’ participation in the inertial response should be required. A trendy solution for the frequency stability improvement in low inertia systems is based on utilizing so-called “synthetic” or “virtual” inertia from modern VSWG. This paper presents a control scheme for the virtual inertia response of wind power plants based on the center of inertia (COI) frequency of a control area. The PSS/E user written wind inertial controller based on COI frequency is developed using FORTRAN. The efficiency of the controller is tested and applied to the real interconnected power system of Southeast Europe. The performed simulations show certain conceptual advantages of the proposed controller in comparison to traditional schemes that use the local frequency to trigger the wind inertial response. The frequency response metrics, COI frequency calculation and graphical plots are obtained using Python.

scholarly journals First Aspect of Conventional Power System Assessment for High Wind Power Plants Penetration

2012 ◽  
Vol 1 (3) ◽  
pp. 107 ◽  
Author(s):  
A Merzic ◽  
M. Music ◽  
M Rascic
Keyword(s):  
Power Systems ◽  
Power System ◽  
Wind Power ◽  
Output Power ◽  
Power Plants ◽  
Thermal Power ◽  
Development Planning ◽  
Time Interval ◽  
Wind Power Plants ◽  
Geographically Distributed

Most power systems in underdeveloped and developing countries are based on conventional power plants, mainly "slow-response" thermal power plants and a certain number of hydro power plants; characterized by inflexible generating portfolios and traditionally designed to meet own electricity needs. Taking into account operational capabilities of conventional power systems, their development planning will face problems with integration of notable amounts of installed capacities in wind power plants (WPP). This is what highlights the purpose of this work and in that sense, here, possible variations of simulated output power from WPP in the 10 minute and hourly time interval, which need to be balanced, are investigated, presented and discussed. Comparative calculations for the amount of installed power in WPP that can be integrated into a certain power system, according to available secondary balancing power amounts, in case of concentrated and dispersed future WPP are given. The stated has been done using a part of the power system of Bosnia and Herzegovina. In the considered example, by planned geographically distributed WPP construction, even up to cca. 74% more in installed power of WPP can be integrated into the power system than in case of geographically concentrated WPP construction, for the same available amount of (secondary) balancing power. These calculations have shown a significant benefit of planned, geographically distributed WPP construction, as an important recommendation for the development planning of conventional power systems, with limited balancing options. Keywords: balancing reserves,  geographical dispersion, output power  variations

scholarly journals Bulk power system availability assessment with multiple wind power plants

2021 ◽  
Vol 11 (1) ◽  
pp. 27
Author(s):  
Angie C. Cepeda ◽  
Mario A. Rios
Keyword(s):  
Power Systems ◽  
Power System ◽  
Wind Power ◽  
Power Plants ◽  
Point Estimate ◽  
System Availability ◽  
Wind Power Plants ◽  
Point Estimate Method ◽  
Bulk Power ◽  
Availability Assessment

The use of renewable non-conventional energy sources, as wind electric power energy and photovoltaic solar energy, has introduced uncertainties in the performance of bulk power systems. The power system availability has been employed as a useful tool for planning power systems; however, traditional methodologies model generation units as a component with two states: in service or out of service. Nevertheless, this model is not useful to model wind power plants for availability assessment of the power system. This paper used a statistical representation to model the uncertainty of power injection of wind power plants based on the central moments: mean value, variance, skewness and kurtosis. In addition, this paper proposed an availability assessment methodology based on application of this statistical model, and based on the 2m+1 point estimate method the availability assessment is performed. The methodology was tested on the IEEE-RTS assuming the connection of two wind power plants and different correlation among the behavior of these plants.

scholarly journals State Estimation via Phasor Measurement Units for Iraqi National Super Grid Power System Network

2016 ◽  
Vol 12 (1) ◽  
pp. 12-22
Author(s):  
Husham Hussein
Keyword(s):  
Power Systems ◽  
Power System ◽  
State Estimation ◽  
Electrical Power ◽  
Estimation Method ◽  
Phasor Measurement Units ◽  
Graph Theoretic ◽  
Phasor Measurement ◽  
Measurement Units ◽  
Analysis System

In this paper describes the operation of power system networks to be nearest to stability rated values limits. State estimation for monitoring and protection power system is very important because it provides a real-time (RT) Phase angle of different nodes of accuracy and then analysis and decided to choose control way (methods). In order to detect the exact situation (instant state) for power system networks parameters. In this paper proposes a new monitoring and analysis system state estimation method integrating with MATLAB environment ability, by using phasor measurement units (PMU's) technology, by this system the estimation problem, iterations numbers, and processing time will reduce. The measurements of phasors value of voltage signal and current estimated and analyzed. Mat lab/PSAT package use as a tool to design and simulate four electrical power systems networks such as INSG 24 buses, IEEE14 bus, Diyala city 10buses (IRAQ), and IEEE6 bus and then installed and applied PMU’s devices to each system. Simulation results show that the PMU's performances effectiveness appear clearly. All results show the validation of PMU’s devices as an estimator to power system networks states and a significant improvement in the accuracy of the calculation of network status. All results achieved and discussed through this paper setting up mathematical models with Graph Theoretic Procedure algorithm.

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