Method and system for providing voltage support to a load connected to a utility power network

Abstract

A voltage restoration system and method of operation thereof for providing loads connected to a distribution network of a public power system or network by boosting the voltage on distribution lines during temporary voltage dips caused by faults or other contingencies to provide voltage protection. This method includes voltage protection of loads connected to a distribution network on the utility power network from a voltage restoration system. Select the voltage protection characteristics required by the load, on the basis of the voltage restoration system and the electrical characteristics of the distribution network, determine whether the voltage restoration system can provide the required first voltage protection characteristics, and determine whether the voltage restoration system can provide the required Voltage protection characteristics, including determining the fault current capacity characteristics of the distribution network and the maximum voltage improvement characteristics that the voltage restoration system can provide. If the voltage protection characteristic is greater than the maximum voltage improvement characteristic, use the fault current capacity characteristic and the maximum voltage improvement characteristic to determine the impedance to be added to the distribution network in the form of an inductance.

Description

[0001] This application is a divisional application of 01808025.1, the filing date of the parent application is April 23, 2001, the priority date is April 24, 2000, and the title of the invention is "Method and method for providing voltage support to loads connected to public power network system" technical field [0002] The invention relates to an electric utility network comprising a generation system, a transmission system and a distribution system serving loads. The flow of electricity on the network is mainly in the form of alternating current, as is familiar to those skilled in the art. Background technique [0003] To remain competitive, utilities are constantly striving to improve system operation and reliability while reducing costs. To meet these challenges, utilities have developed techniques to increase the life of installed equipment, and, to diagnose and monitor their utility networks. Developing these technologies is becoming increasingly important as the s...

AI Technical Summary

Problems solved by technology

Indeed, momentary voltage drops on factory or manufacturing equipment can result in product loss, scrap, disrupted schedules, timeouts, and increased maintenance, all of which can significantly increase costs

For example, a power failure on a semiconductor processing facility can result in $250,000 in scrap on semiconductor integrated circuits

And, no matter how well the utilities service these plants, these incidents cannot be avoided

Images