Assessment of voltage security methods and tools. Final report

Technical Report · Sun Oct 01 04:00:00 EDT 1995

OSTI ID:123188

Vaahedi, E

The main objective of this project was to provide a comprehensive assessment and evaluation of tools that allow the optimal placement and operation of VAr control devices to ensure voltage secure operation of the power system. These tools included the ones currently used by utilities as well as the most promising OPF/optimal VAr allocation programs. To achieve the project objectives, the following tasks were undertaken: An industry survey was conducted to determine the current practices by utilities in regard to voltage security. This was reinforced with comprehensive reviews of (a) technical and economic considerations in establishing voltage profile and (b) optimal power flow/VAr planning methods. Load response tests were performed to identify load models for voltage security. Parameter estimation methods were developed to extract parameters from measured data for static and dynamic models. A generic dynamic load model was developed and incorporated within EPRI`s LOADSYN program. Voltage stability and VAr design studies were carried out on four utility systems using existing static and dynamic simulation tools. Voltage security and VAr planning issues were formulated as optimization problems. Three OPF/optimal VAr planning tools were used to address these problems. Studies were conducted on four utility systems. Based on the findings of the project, recommendations were made in the following primary areas: Bridging the gap of knowledge related to voltage stability among utilities; Load modeling for voltage stability applications; Procedure for voltage stability analysis using existing tools; Procedures for voltage security analysis using OPF/optimal VAr planning tools; Recommendations for further development of OPF/optimal VAr planning tools as well as specifications for a new generation of optimal VAr planning tools.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); British Columbia Hydro, Vancouver, BC (Canada)
• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 123188
• Report Number(s): EPRI-TR--105214
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CONTROL
ELECTRIC POTENTIAL
EVALUATION
FUNCTIONAL MODELS
POWER SYSTEMS
PROGRESS REPORT
STABILITY
VAR CONTROL SYSTEMS