Application of FACTS devices for flexibility control of transmission networks

Irina Kolosok,Alexander Tikhonov,Elena Korkina,V.A Stennikov,M Negnevitsky,P Changwei,J.-Y Yoon,S.V Alekseenko,C Rehtanz,S.P Filippov,F.-J Lin,N.I Voropai,N.A Yusifbeyli,B Sereter

doi:10.1051/e3sconf/202020902016

Abstract

Maintenance of power balance at each time moment in every node and in the electric power system as a whole is a mandatory condition for supplying the electric power of required quality (frequency, voltage levels). Property of the system to be considered as its ability to control power balance is referred to as flexibility. Technologies for operating conditions control or systems services are an efficient means of regulating the flexibility of HV transmission networks in the cycle of on-line and anti-emergency control. Present-day FACTS of the second generation based on power electronics whose control systems ensure high efficiency of control and stabilization are the most perspective means of flexibility regulating and control. The paper considers potentials of using those devices for regulating the flexibility of 500/200 kV network that is a section of a real EPS. Calculations were performed in the simulation experiment and were based on real telemetry measurements using the State Estimation Software. The results of the studies have showed that substitution of the first-generation FACTS devices by the controlled second-generation FACTS devices and installation of new present-day FACTS allows notable enhancement of HV electric networks controllability and ensures the required level of networks flexibility.

Highlights

Energy industry development on the base of innovation technologies radically changes the structure and properties of electric power systems (EPS)
Results of investigation have shown that replacement of obsolete FACTS devices of the first generation by controllable devices of the second generation and installation of new present-day FACTS devices allows notable enhancement of HV electric networks controllability, and ensures the required level of networks flexibility
Technologies for operating conditions control or systems services are an efficient means of HV transmitting networks flexibility control in the cycle of real-time and anti-emergency control

Summary

Introduction

Energy industry development on the base of innovation technologies radically changes the structure and properties of electric power systems (EPS). According to [4], flexibility can be defined as ability of the system to ensure power balance control in every node and in the entire EPS. Power balance in the node may be maintained by changing the generating capacity, load capacity, by use of energy storage, and by changing the load flows in the outgoing lines. FACTS (Flexible Alternative Current Transmission System) technology allows better use of transfer capabilities of transmission lines, real-time change of load flows and practically instant response to EPS disturbances. Large-scale use of FACTS technologies and devices will notably enhance the EPS controllability and, their flexibility, stability and survivability [5]. Results of investigation have shown that replacement of obsolete FACTS devices of the first generation by controllable devices of the second generation and installation of new present-day FACTS devices allows notable enhancement of HV electric networks controllability, and ensures the required level of networks flexibility

EPS flexibility analysis

A proposed approach for transmission network flexibility analysis

Check of locational flexibility

Computational example

Conclusions