Power System Static Security Enhancement Through Interline Power Flow Controller | IEEE Conference Publication | IEEE Xplore

Power System Static Security Enhancement Through Interline Power Flow Controller

Publisher: IEEE

Abstract:

Due to ever increasing load demand and contingencies in developing countries, the operation of the power systems are at almost full capacity coupled with limited grid exp...View more

Abstract:

Due to ever increasing load demand and contingencies in developing countries, the operation of the power systems are at almost full capacity coupled with limited grid expansion. As such, line overloads are inevitable thus, operating the system around its limit. Hence, system's security is endangered. Flexible Alternating Current Transmission System (FACTS) supports utilization of obtainable system without interrupting system limit. Static security evaluations of a modelled IEEE 30-bus test system in MATLAB/SIMULINK/PSAT environment was carried out. The security situation of the system with incorporation of Interline Power Flow Controller (IPFC) was determined. Erstwhile, Contingency Severity Index (CSI) based on Performance Index (PI) of Real Power was employed to determine the optimal location of the IPFC, while the optimal sizing (percentage compression) was carried out using the sequential quadratic programming method. The electric power network was subsequently modelled with-and without the IPFC. Hence, the static security of the base case scenario (uncompensated) and IPFC compensated system models with various contingency scenarios were assessed.
Date of Conference: 28-29 June 2018
Date Added to IEEE Xplore: 04 November 2018
ISBN Information:
Publisher: IEEE
Conference Location: Cape Town, South Africa

I. Introduction

The electrical power systems are extremely complex networks [1] covering vast area with several generators, different level transformers, numerous interconnected transmission lines and multiplicity of loads. Hence electrical power systems are adjudged as one of the most multifaceted and complicated control system in existence. Consequently, an interconnected power scheme control and operation must ensure that all operational variables are coordinated and structured within acceptable ranges under any given conditions [2]. Contingencies, ever increasing power demand and distribution together with limited or no expansion of the grid system result in overloading of the lines, generation and operation around system limit [3], [4] and [5]. Achieving reliable and secure power system is critical challenge. FACTS devices are being increasingly used in the network to address some of these challenges. FACTS have been used for power flow control, voltage control/regulation and stability enhancement [6] and [7]. FACTS controllers are incorporated into the power system in shunt on the buses or in series with the transmission lines or hybrid of shunt with series connection to accomplish these several control tasks [8], [9] and [10]. An IPFC, a recent generation FACTS devices which enables control of active power and reactive power, consists of two Voltage Source Converters (VSCs) which are technically Static Synchronous Series Compensators (SSSCs). Each converter can regulate reactive power in their respective transmission line of installation through series injection of voltage. The real power is exchanged between the VSCs via a common bi-directional DC link.

References

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