초록 ▼

The power system stabilizer is provided at an individual power system to be separated due to an accident cutting off a link line which interconnects a number of power systems to form a large-scale power system. The power systems include power stations such as power plants and transformer substations

The power system stabilizer is provided at an individual power system to be separated due to an accident cutting off a link line which interconnects a number of power systems to form a large-scale power system. The power systems include power stations such as power plants and transformer substations. A simplified arithmetic processing unit of the stabilizer performs an arithmetic processing by a simple linear equation using an output frequency of a representative power station belonging to the separated power system immediately after the accident has been cleared, so that a total load drop of the separated power system can be assumed. Based on the assumption amount, balance control of demand and supply in the separated system is made.

대표청구항 ▼

A power system stabilizer provided at an individual power system which is to be separated (a separated system) due to an accident cutting off a link line which interconnects a plurality of individual power systems to form a large-scale power system (main system), said plurality of individual power s

A power system stabilizer provided at an individual power system which is to be separated (a separated system) due to an accident cutting off a link line which interconnects a plurality of individual power systems to form a large-scale power system (main system), said plurality of individual power systems including power stations such as power plants, transformer substations and loads, the power system stabilizer comprising: arithmetic processing means for assuming a total load-drop amount of the separated system caused by a voltage drop during said accident by an arithmetic operation based on a difference between a frequency in a representative power station belonging to said separated system and a frequency at a constant time after the frequency in said representative power station has exceeded a prescribed value; and control means for controlling a balance in demand and supply at each power station in said separated system on the basis of an assumption amount obtained by said operation of the arithmetic processing means.