Trunk Transmission Integrated Stability Control System (ISC)

On-line Transient and Frequency Stability Control System that Make Full Use of ICT

Background

• Drastic-changes in the power system as a result of large penetration of DER and Increasing stability problems due to the interconnection of large power plant to the local power system
• Assuming that it will be difficult to deal with the conventional single-function system
• Developed an advanced SIPS (System Integrity Protection Schemes) that makes full use of ICT and grid stabilization technology to realize a stable power supply in a short construction period and low cost

Features

• Dealing with large penetration of DER (Refinement of control amount by pre-calculation control and additional control)
• Cost reduction by streamlining equipment
• Operation reduction of operators

Use

• When a fault occurs in the power system, the ISC system trips the unstable generators instantly (The solution for the transient stability problem).
• When a separation is detected in the power system, the ISC system trips the surplus generators or sheds the surplus demand (The solution for the frequency stability problem).
• Recognize the power system configuration in real time and automatically change operation settings.