Journal ArticleDOI
System Load Swings
Reads0
Chats0
TLDR
In this paper, the authors analyzed the response of parts of the system to changes in load, voltage, and frequency, and found that the long-time load swings are not initiated or sustained by turbine governors.Abstract:
Operating records of the Consolidated Edison Company of New York, Inc., revealed the existence of irregular fluctuations in the loads on generating stations and tie feeders. Tests were conducted to determine the response of parts of the system to changes in load, voltage, and frequency. By analyzing the test results to show the relation between these three quantities under various operating conditions, it was possible to establish the origin of the load swings, as well as to determine their magnitude, duration, and recurrence. Three general types of load swings were observed: small synchronizing power oscillations, short-time swings caused by fluctuating railroad loads, and long-time swings produced by the unco-ordinated adjustments of station loads. These swings are not initiated or sustained by the turbine governors. The synchronizing power oscillations and the short-time swings do not affect system operation, but the long-time swings do affect the loading of the tie feeders and the operation of boiler equipment. It is expected, however, that the greater appreciation of the problem derived from the tests, plus the installation of a common frequency indicator in all stations, will enable the operators to reduce the long-time load swings.read more
Citations
More filters
Journal ArticleDOI
Load Representation in Power System Stability Studies
C. Concordia,S. Ihara +1 more
TL;DR: In this paper, the authors present a load model for power system stability studies, which is qualitatively different from generator load modeling in many aspects, such as reliability of load estimates, models of different components must be combined to obtain a reasonably manageable overall system model and field measurements are not at all easy.
Journal ArticleDOI
Representation of Induction-Motor Loads During Power-System Stability Studies
Journal ArticleDOI
The Effects of Distribution Voltage Reduction on Power and Energy Consumption
Brian R. Scalley,D.G. Kasten +1 more
TL;DR: It would be premature for any regulatory agency to mandate such programs at the present time, because of the lack of hard evidence and the problems associated with conservation voltage reduction programs.
Journal ArticleDOI
The Effect of Frequency Reduction on Plant Capacity and on System Operation [includes discussion]
Journal ArticleDOI
Emergency Control of System Loads
TL;DR: In this article, the authors present an approach for load reduction to meet temporary emergency conditions until normal capacity can be restored, which may not be sufficient in most instances to avoid the necessity of interrupting load.