Power Control Centers Research Articles

Predictive Integral and Self-Tuning Regulator for Load-Frequency Control Simulation of Interconnected Power Systems

The paper deals with computer simulation of deterministic regulator and two adaptive control algorithms which fall into the category of easy implementable algorithms on the nresent microprocessors. An ordinary single-input single - outnut feedback control loop is considered. The se adaptive algorithms play in the hierarchical control systems the same role as convencionally employed PI and PID regulators or their digitalized versions. Simulation proved a nnlicability of these adaptive algorithms. The achieved results will serve as a basis for further efforts aimed at implementation of an contral load-frequency controller at the Czechoslovak Dispatch Power Control Centre.

Dynamic Simulation of a Power System Network for Dispatcher Training

This paper describes the various requirements, problems and solutions in order to realize a power system network dynamic simulator for dispatcher training. Especially software techniques such as simulation algorithm and modelling are stressed. The description is based upon the experience gained in developing and implementing the simulator at the Power Control Center (PCC) of the Chubu Electric Power Co. (CEPCO), Japan. The simulator has been in operation since June 1981 in conjunction with the Automatic Dispatching System (ADS) at the PCC of CEPCO. To give trainees realistic simulation, the simulator calculates AC load flows and frequencies of a 287 node network every 5 seconds.

Dynamic Simulation of a Power System Network for Dispatcher Training

This paper describes the various requirements, problems and solutions in order to realize a power system network dynamic simulator for dispatcher training. Especially software techniques such as simulation algorithm and modeling are stressed. The description is based upon the experience gained in developing and implementing the simulator at the Power Control Center (PCC) of the Chubu Electric Power Co. (CEPCO), Japan. The simulator has been in operation since June 1981 in conjunction with the Automatic Dispatching System (ADS) at the PCC of CEPCO. To give trainees realistic simulation, the simulator calculates ac load flows and frequencies of a 287 node network every 5 seconds.

A Multi-Microcomputer Based Distributed Front End Communications Subsystem for a Power Control Center

As a Power Control Center matures the loading on its main CPU may eventually reach a critical level. A method used at one control center to solve this problem is to add on a front end communications processor to the existing system. A design using standard, off-the-shelf microcomputers is described. The front end system consists of a single sixteen bit microcomputer and multiple eight bit microcomputers used as slave processors. The front end processor is interfaced to the PCC main CPU via a 38.4k baud serial data link. The functions which were offloaded from the main CPU are described along with the development process used to integrate the overall system operation. The results of tests on the new configuration are evaluated to show the actual performance levels.

A Multi-Microcomputer Based Distributed Front End Communications Subsystem for a Power Control Center

A Multi-Microcomputer Based Distributed Front End Communications Subsystem for a Power Control Center

Human Factors Survey and Analysis of Electric Power Control Centers

An electric power system generally includes a number of generating plants, substations, and high voltage transmission lines, as well as thousands of circuit breakers, switches, transformers, and other components, all spread over hundreds or thousands of square miles. Two to five system operators work at dispatch centers and use modern, computerized systems for system monitoring, information display, and operation of the power system. This paper describes the functions performed at typical dispatch centers, as well as characteristic physical facilities, group displays, operator consoles, power system controls and displays, and CRT display formats and information coding techniques. Human factors problem areas which exist within electric power system control centers are pointed out.

Economic Power Dispatch with Line Security Limits

A practical and efficient method is presented for the economic dispatch of generation with explicit recognition of line security limits. The linearized or dc loadflow approximation is used to formulate the line security limits as linear inequality constraints on the generator outputs. The optimization problem is solved by the method of gradient projection. The proposed method does not require a great deal more computation time or system-state information than the established method of dispatch which is unable to recognize line security limits. In consequence, the method gives power control centers with only moderate sized dispatch computers the potential for recognizing line security limits in their economic dispatch and thus obtaining improved security and economy in system operation.