OVERLOAD MANAGEMENT SYSTEM

摘要

An overload management system (20) is provided, including a method and an apparatus, for controlling the operation of electrical equipment in a short-term overload region above the equipment's continuous capability operation curve, without suffering significant loss of equipment life. This overload management system (20) is particularly beneficial for use with equipment having load management capability, such as modular thyristor controlled series capacitor (TCSC) system (25) using phase firing based on monitored capacitor voltage (Vc) and line current (IL). For vernier operation, the system (25) predicts an upcoming firing angle for switching a switching device (35) to govern the current received by the electrical device, such as to bypass line current (IL) around a series capacitor (C, 30) of the TCSC system. The overload management system (25) may serve as one of several higher-level controllers (86) providing input to a vernier controller (50) for accomodating competing objectives of various system demands.