Assessment of performance of turbo-alternators at the Jebba Hydroelectric Power Station in Nigeria from 2005 – 2014

Omeiza, I.O.A.; Ojongbede, H. A.; Thomas, Cornelius T.; Olufeagba, B. J.

doi:10.4314/njt.v38i1.18

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…head. As presented in [5], the electrical power form JHEPS is represented in (1) and (2), showing that it is a function of the operating head.…”

Section: Methodsmentioning

confidence: 97%

“…19% of the installed capacity is provided by the more reliable and cheap hydropower plants. The three major hydropower plants in Nigeria are the Kainji hydroelectric power station (KHEPS), the Jebba hydroelectric power station (JHEPS) and the Shiroro hydroelectric power station [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…The two power stations operate in cascade but lack a control system regulating their operation. They are being managed by the experience and intuition TELKOMNIKA Telecommun Comput El Control  A progressive domain expansion method for solving optimal control problem (Olalekan Ogunbiyi) 2063 of the operators [2,5]. From the operational report, there are occasions where some units at JHEPS are shut down if the release from KHEPS is low [6].…”

Section: Introductionmentioning

confidence: 99%

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A progressive domain expansion method for solving optimal control problem

et al. 2020

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Electricity generation at the hydropower stations in Nigeria has been below the expected value. While the hydro stations have a capacity to generate up to 2,380 MW, the daily average energy generated in 2017 was estimated at around 846 MW. A factor responsible for this is the lack of a proper control system to manage the transfer of resources between the cascaded Kainji-Jebba Hydropower stations operating in tandem. This paper addressed the optimal regulation of the operating head of the Jebba hydropower reservoir in the presence of system constraints, flow requirement and environmental factors that are weather-related. The resulting two-point boundary value problem was solved using the progressive expansion of domain technique as against the shooting or multiple shooting techniques. The results provide the optimal inflow required to keep the operating head of the Jebba reservoir at a nominal level, hence ensuring that the maximum number of turbo-alternator units are operated.

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“…head. As presented in [5], the electrical power form JHEPS is represented in (1) and (2), showing that it is a function of the operating head.…”

Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A progressive domain expansion method for solving optimal control problem

et al. 2020

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“…The KHEPS located at 09 0 51 ′ 45 ′′ , 04 0 36 ′ 48 ′′ has an installed capacity of installed capacity of 760 MW from 8 units of turboalternators, units 1G5 to 1G12. Units 5 and 6 are rated 120MW each,units 7,8,9 and (Omeiza et al, 2019;Salami, 2007) *Corresponding Author…”

Section: Introductionmentioning

confidence: 99%

Dynamical Control Model of the Cascaded Kainji-Jebba Hydropower Operating Head

et al. 2019

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Operation and design of control system for the cascaded Kainji-Jebba hydropower system poses a great challenge to researchers and engineers. The difficulties arose from the fact that the system is affected by several nonlinear interacting factors such as variations in inflows, stochastic factors that are weather related, availability of the turbo-alternators, and numerous other constraints that are influenced by the system dynamics. All these makes the mathematical representation of the system difficult. This paper presents the development of a dynamical model for the operation and optimal control of the operating heads of the cascaded system. The mathematical models were developed from energy conversion equation and Bernoulli’s equation. The model was calibrated and tuned using measured data. Upon validation by comparing the response of the model with measured head, a deviation within was observed, making it a good prediction of the system response and appropriate for control system design. Keywords— Control model, Discharge, inflows, Operating head, Turbo-alternators

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“…The two power stations operate in cascade but lack a control system regulating their operation. They are being managed by experience and intuition of the operators [7]. From the operational report, there are occasions where some units at JHEPS are shutdown if the release from KHEPS is low.…”

Section: Introductionmentioning

confidence: 99%

Optimal Control of the Cascaded Kainji-Jebba Hydroelectric Power Station Based on Conjugate Gradient

et al. 2019

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Electricity supply in Nigeria has been far below the estimated demand and the installed capacity of the plants. Hence, there has been continuous research on improving the performance of the existing plants, but the government mainly focuses on increasing the installed capacity. This paper presents the determination of the optimal release of water to maximize the energy generation potential of the cascaded Kainji-Jebba hydroelectric power station in Nigeria. The problem was formulated as an optimal control problem with an objective of minimizing the deviation of the head of the Jebba reservoir within a set limit. A conjugate gradient algorithm was then used as a direct solution to the optimal control problem. The computed control law and the resulting state trajectories of 2% error affirm the solution to be genuine and reliable. The algorithm is recommended for use in the design of a real-time optimal controller for the system and a decision guide for the operators.

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Assessment of performance of turbo-alternators at the Jebba Hydroelectric Power Station in Nigeria from 2005 – 2014

Cited by 6 publications

References 3 publications

A progressive domain expansion method for solving optimal control problem

A progressive domain expansion method for solving optimal control problem

Dynamical Control Model of the Cascaded Kainji-Jebba Hydropower Operating Head

Optimal Control of the Cascaded Kainji-Jebba Hydroelectric Power Station Based on Conjugate Gradient

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