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Generation, Transmission and Distribution, IEE Proceedings C

Issue 3 • Date May 1990

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Displaying Results 1 - 8 of 8
  • Identifying electrically weak and strong segments of a power system from a voltage stability viewpoint

    Publication Year: 1990 , Page(s): 205 - 212
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (644 KB)  

    Voltage instability leading to collapse appears to be due to the inability of networks to meet a demand for reactive power at certain critical (or weak) buses. Practical control algorithms to prevent voltage collapse should identify the critical buses in the network and maintain control on voltages at these buses in particular. Two methods are proposed for identifying the weak buses and segments i... View full abstract»

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  • Real time implementation of a MIMO adaptive power system stabiliser

    Publication Year: 1990 , Page(s): 186 - 194
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (656 KB)  

    Power systems are nonlinear and they are often subjected to random disturbances. Therefore stochastic controllers with online system identification are ideally suited to power system control problems. Experience with a real time implementation of an adaptive power system stabiliser to damp the dynamic oscillations of a power system is presented. A multi-input multi-output (MIMO) pole shifting cont... View full abstract»

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  • A modified decoupled linear programming technique for power system state estimation

    Publication Year: 1990 , Page(s): 239 - 244
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (464 KB)  

    The authors present a modified decoupled linear programming technique to solve the state estimation problem. This technique is based on the sensitivity of the optimal solution to changes in the input data without the need to re-solve the problem for each new value. This technique uses LP to solve the subproblems of active and reactive powers only once and forms the inverse of the basis matrix of e... View full abstract»

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  • Hybrid three phase load flow

    Publication Year: 1990 , Page(s): 177 - 185
    Cited by:  Papers (5)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (668 KB)  

    The development of a unique three phase load flow algorithm is presented which employs a hybrid (implicit Z-BUS and Y-BUS Gauss) iterative technique without making any nonpractical assumptions about the generators. The main applications of this three phase load flow program will be to find optimum line configuration when a utility wants to construct a new transmission line, to find the optimum tra... View full abstract»

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  • Field testing of a long radial transmission system and verification of computer simulation results

    Publication Year: 1990 , Page(s): 195 - 204
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (580 KB)  

    Results of field tests carried out on a 132 kV 410 km radial power system in Western Australia are presented and discussed. Algebraic expressions which relate loads to voltage and frequency variations are derived from results of small disturbance tests. The excitation system representation of a gas-turbine within the supply area has been improved by matching the results of simulation studies with ... View full abstract»

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  • Design of fuzzy power system stabilisers for multimachine power systems

    Publication Year: 1990 , Page(s): 233 - 238
    Cited by:  Papers (12)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (428 KB)  

    A new type of power system stabiliser based on fuzzy set theory is proposed to improve the dynamic performance of a multimachine power system. To have good damping characteristic over a wide range of operating conditions, speed deviation (Δω) and acceleration (Δω˙) of a machine are chosen as the input signals to the fuzzy stabiliser on that particular machine. These inp... View full abstract»

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  • Computational comparison of efficacies of aeolian vibration damping devices for multiconductor overhead power lines

    Publication Year: 1990 , Page(s): 225 - 232
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (664 KB)  

    Aeolian vibration in multiconductor overhead power transmission lines is usually controlled by one of two techniques, namely by a combination of rigid spacing elements and end-point Stockbridge dampers, or suitably positioned spacer dampers. A comparison based on theory and computation is provided. It is concluded, consistent with observations over many years, that both philosophies suffice when t... View full abstract»

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  • Hydro-thermal stochastic optimal power dispatch: a Newton's based approach

    Publication Year: 1990 , Page(s): 213 - 224
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (968 KB)  

    A technique that deals with the power system hydro-thermal optimal power dispatch problem accounting for the effects of uncertainty in predicting active power demand is presented. The method relates the probability distribution of the uncertain factors in the system active power generation, bus voltages, and phase angles to the probability distribution of the errors resulting from the forecast of ... View full abstract»

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