Current Status of the Indian Power System and Dynamic Performance Enhancement of Hydro Power Systems with Asynchronous Tie Lines

2003 ◽  
Vol 31 (7) ◽  
pp. 605-626 ◽  
Author(s):  
IBRAHEEM ◽  
PRABHAT KUMAR
Keyword(s):  
Power Systems ◽  
Power System ◽  
Performance Enhancement ◽  
Dynamic Performance ◽  
Current Status ◽  
Hydro Power ◽  
Tie Lines

scholarly journals A Novel Methodology for Adaptive Coordination of Multiple Controllers in Electrical Grids

Mathematics ◽  
2021 ◽  
Vol 9 (13) ◽  
pp. 1474
Author(s):  
Ruben Tapia-Olvera ◽  
Francisco Beltran-Carbajal ◽  
Antonio Valderrabano-Gonzalez ◽  
Omar Aguilar-Mejia
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Large Scale ◽  
Short Circuit ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Electric Power System ◽  
Design Stage ◽  
Positive Interaction

This proposal is aimed to overcome the problem that arises when diverse regulation devices and controlling strategies are involved in electric power systems regulation design. When new devices are included in electric power system after the topology and regulation goals were defined, a new design stage is generally needed to obtain the desired outputs. Moreover, if the initial design is based on a linearized model around an equilibrium point, the new conditions might degrade the whole performance of the system. Our proposal demonstrates that the power system performance can be guaranteed with one design stage when an adequate adaptive scheme is updating some critic controllers’ gains. For large-scale power systems, this feature is illustrated with the use of time domain simulations, showing the dynamic behavior of the significant variables. The transient response is enhanced in terms of maximum overshoot and settling time. This is demonstrated using the deviation between the behavior of some important variables with StatCom, but without or with PSS. A B-Spline neural networks algorithm is used to define the best controllers’ gains to efficiently attenuate low frequency oscillations when a short circuit event is presented. This strategy avoids the parameters and power system model dependency; only a dataset of typical variable measurements is required to achieve the expected behavior. The inclusion of PSS and StatCom with positive interaction, enhances the dynamic performance of the system while illustrating the ability of the strategy in adding different controllers in only one design stage.

Micro-Hydro Power Systems: Current Status and Future Research in Pakistan

2009 ◽  
Author(s):  
Javed A. Chattha ◽  
Mohammad S. Khan ◽  
Anwar ul-Haque
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Cross Flow ◽  
Current Status ◽  
Total Power ◽  
Centrifugal Pumps ◽  
Hydro Power ◽  
Remote Areas ◽  
Power Load ◽  
Custom Made

The total installed electric power capacity of Pakistan is about 20,000 MW. Pakistan is currently facing a power deficit of about 4,000 MW. This deficit is creating huge difficulties for the consumers as electrical power load shedding has become a norm in all over the country. Currently only about 33% of the total power is being produced by hydro sources and major electric power is still produced by burning oil and gas. The hydro potential of Pakistan is estimated to be about 41 GW, out of which 1,290 MW can be generated by micro-hydro systems. These potential off grid micro-hydro systems are very essential for the consumers living in the remote areas of Pakistan and may be installed on canals and water falls which are abundant in the remote areas. This paper discusses the potential and the status of installed of hydro power systems in Pakistan. Cross flow turbines are being manufactured in Pakistan and are usually quite successful for micro-hydro systems. However, cross flow turbines are not suitable for majority of the prospective site conditions. Furthermore, custom made conventional turbines are not mass produced and for the micro-hydro systems, standard centrifugal pumps may be used as turbines. These centrifugal pumps are easily available in the market at comparatively much lower cost and shorter delivery periods. A pump was installed at a suitable site for generation of electricity, while running in turbine mode. It was initially estimated that the Pump as Turbine, PaT would be able to generate about 70 kW of power based on the available flow rate and head parameters at the site. Currently only half of that power is being generated by the PaT, under study. Efforts are underway to rectify the problems being faced and improve the power generation capacity of the installed unit. This paper discusses the problems associated with the use of PaT and measures being undertaken to make it feasible for the use of micro-hydro systems. Two major issues; draft tube design and presence of trash in the canal water, responsible for performance deterioration have been discussed in this paper.

scholarly journals Application of the First Replica Controller in Korean Power Systems

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3343 ◽  
Author(s):  
Jiyoung Song ◽  
Seungchan Oh ◽  
Jaegul Lee ◽  
Jeonghoon Shin ◽  
Gilsoo Jang
Keyword(s):  
Power Systems ◽  
Power System ◽  
Large Scale ◽  
Performance Test ◽  
Dynamic Performance ◽  
Parameter Tuning ◽  
Electric Utility ◽  
Acceptance Test ◽  
Thyristor Controlled Series Compensator ◽  
Practical Field

The purpose of this paper is to introduce, examine, and evaluate the industrial experiences and effectiveness of a Thyristor Controlled Series Compensator (TCSC) replica controller installed in Korea in 2019 through a review of its configuration, test platform, and practical application, and further to propose operational guidelines for replica controllers. Four representative practical cases were conducted: a Dynamic Performance Test (DPT) under a sufficiently large-scale power system prior to the Site Acceptance Test (SAT), pre-verification for on-site controller modification during operation stage, parameter tuning to mitigate the control interaction, and time domain simulation for Sub-Synchronous Torsional Interaction (SSTI). None of these four cases can be performed in a Factory Acceptance Test (FAT) or on-site. Therefore, TCSC control performance was accurately verified under the entire Korean power system based on a large-scale real-time simulator, which demonstrated its effectiveness as a powerful tool for operations including multiple power electronics devices. Our review herein of these four practical cases is expected to show the usefulness of replica controllers, to demonstrate their strength to deal with practical field events, and to contribute to the further expansion of the application area from a perspective of electric utility.

Constrained neural adaptive predictive control of SMES for dynamic performance improvement of power systems

2021 ◽  
pp. 0309524X2199245
Author(s):  
Asima Syed ◽  
Mairaj ud din Mufti
Keyword(s):  
Power Systems ◽  
Power System ◽  
Performance Improvement ◽  
Magnetic Energy ◽  
Dynamic Performance ◽  
Superconducting Magnetic Energy Storage ◽  
Predictive Controller ◽  
Magnetic Energy Storage ◽  
Adaptive Predictive Control ◽  
Fast Acting

For dynamic performance improvement of modern power systems, the use of fast acting energy systems like superconducting magnetic energy storage (SMES) is imperative. In this paper, incorporation of a small rating SMES in a solar and wind power penetrated multi-area power system is proposed. A non-linear neural adaptive predictive controller is used to generate an optimal power command taking into account the converter rating and energy level constraints of SMES unit. The SMES is represented by a control relevant model comprising of a first order lag compensator cascaded by an integrator to translate the hardware constraints pertaining to its coil current into modified power constraints. Moreover for avoiding the sudden SMES outage, the power thresholds are forcibly varied as the SMES current reaches near its maximum and minimum values. The uprightness of the designed scheme is illustrated by simulation studies performed on a three area power system.

scholarly journals Optimal Allocation of Static Var Compensators in Electric Power Systems

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3219 ◽  
Author(s):  
Martin Ćalasan ◽  
Tatjana Konjić ◽  
Katarina Kecojević ◽  
Lazar Nikitović
Keyword(s):  
Power Systems ◽  
Power System ◽  
Optimal Power Flow ◽  
Optimal Allocation ◽  
Reactive Power ◽  
Dynamic Performance ◽  
Variable Load ◽  
Power Losses ◽  
Facts Devices ◽  
The Impact

In the current age, power systems contain many modern elements, one example being Flexible AC Transmission System (FACTS) devices, which play an important role in enhancing the static and dynamic performance of the systems. However, due to the high costs of FACTS devices, the location, type, and value of the reactive power of these devices must be optimized to maximize their resulting benefits. In this paper, the problem of optimal power flow for the minimization of power losses is considered for a power system with or without a FACTS controller, such as a Static Var Compensator (SVC) device The impact of location and SVC reactive power values on power system losses are considered in power systems with and without the presence of wind power. Furthermore, constant and variable load are considered. The mentioned investigation is realized on both IEEE 9 and IEEE 30 test bus systems. Optimal SVC allocation are performed in program GAMS using CONOPT solver. For constant load data, the obtained results of an optimal SVC allocation and the minimal value of power losses are compared with known solutions from the literature. It is shown that the CONOPT solver is useful for finding the optimal location of SVC devices in a power system with or without the presence of wind energy. The comparison of results obtained using CONOPT solver and four metaheuristic method for minimization of power system losses are also investigated and presented.

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