New Approach for Optimal Location and Parameters Setting of UPFC for Enhancing Power Systems Stability under Contingency Analysis

Abstract

Operation of power system within specified limits of voltage and frequency are the major concerns in power system stability studies. As power system is always prone to disturbances, which consequently affect the voltage instability and optimal power flow, and therefore risks the power systems stability and security. In this paper, a novel technique based on the "Artificial Algae Algorithm" (AAA) is introduced, to identify the optimal location and the parameters setting of Unified Power Flow Controller (UPFC) under N-1 contingency criterion. In the first part, we have carried out a contingency operation and ranking process for the most parlous lines outage contingencies while taking the transmission lines overloading (NOLL) and voltage violation of buses (NVVB) as a performance parameter (PP = NOLL + NVVB). As UPFC possesses too much prohibitive cost and larger size, its optimal location and size must be identified before the actual deployment. In the second part, we have applied a novel AAA technique to identify the optimal location and parameters setting of UPFC under the discovered contingencies. The simulations have been executed on IEEE 14 bus and 30 bus networks. The results reveals that the location of UPFC is significantly optimized using AAA technique, which has improved the stability and security of the power system by curtailing the overloaded transmission lines and limiting the voltage violations of buses.

Analysis of Optimal Deployment of Several DGs in Distribution Networks Using Plant Propagation Algorithm

“…NRLF analysis follows a sequential approximation appertaining to an initial presume of the variables. By virtue of its quadratic convergence, the NRLF analysis is less likely to diverge with malevolent issues as well [52]. For any network, the voltage at p th bus could be calculated as shown Eq.…”

Regulation Principles of Power Flow Gradients to Multiple Characteristic Independent Variables in UPFC Embedded Power System

“…There are also a lot of studies carried out regarding the power flow control and applications in [15][16][17][18][19][20][21]. The optimal power flow control methods of UPFC aiming to improve the transfer capability of the system are studied in [15,16].…”

“…In [18], a new real time Lyapunov based controller in UPFC was investigated to improve the power quality. In [19][20][21], several power flow control strategies and approaches of UPFC were designed for damping the power flow oscillations and enhancing the power system stability. However, most of these power flow control methods or applications of UPFC concentrate on realizing the presupposed power flow regulation targets or purposes more precisely and smoothly through improving the power flow regulation capabilities or performances by UPFC.…”

A High-Voltage “Sen” Transformer: Configuration, Principles, and Applications

“…The UPFC can optimize power flow distribution and increase the capacity of transmission lines [7,8]. At present, research on UPFC systems mainly focuses on improving UPFC topology configuration and enhancing power flow control functions [9][10][11]. The traditional UPFC, which is based on a voltage source converter (VSC), injects a harmonic voltage to the power system.…”