Optimal reactive power planning with facts devices by particle swarm technique

Abstract

Reactive power planning by optimal allocation of static VAr compensator (SVC) and thyristor controlled series capacitor (TCSC) is presented in this paper. Three objective functions (minimization of the installation cost of SVC or TCSC, minimization of the energy loss cost, and minimization of the total cost defined as the sum of the installation cost and energy loss cost) are considered for comparison purpose. All the objective functions are subject to power flow equations, bus voltage limits, reactive power output of generators at voltage controlled buses, and limits of setting values for SVC and TCSC. An optimization technique based on particle swarm optimization (PSO) algorithm is developed to determine the optimal locations of SVC and TCSC and their corresponding setting values. A case study with a modified IEEE 14-bus system is carried out to demonstrate the effectiveness of the proposed technique. It is found that the obtained optimal solutions meet the requirement of the objective functions while satisfying all the constraints. Numerical results for total real and reactive power losses, energy loss cost, installation cost, and total cost are also discussed.

PSO based technique for loss minimization considering voltage profile and cost function

“…The line data and the bus data of the IEEE 30-bus RTS are given in [12]. The parameters of the optimization algorithm are listed in Table 1 [2,3,14,20]. The SVC installations in the transmission system to improve the transmission loss in the system have been conducted at several load conditions subjected to buses 9, 17 and 24.…”

“…The SVC can inject or absorb its reactive power (Q SVC ) at a chosen bus. It injects reactive power into the system Q SVC < 0 and absorbs reactive power from the system if Q SVC > 0 [14]. The working range of SVC is between -100MVar and 100MVar [2].…”

Transmission loss minimization using SVC based on Particle Swarm Optimization

“…The SVC is a shunt type FACTS device which defined as a shunt connected static var generator or absorber whose output is adjusted in order to exchange the capacitive or inductive current to maintain or control specific parameters of the power system, typically the bus voltage [13]. The SVC can inject or absorb its reactive power (Q SVC ) at a chosen bus.…”

Applications of PSO technique to optimal location and sizing of static var compensator

“…The SVC can inject or absorb its reactive power (Q SVC ) at a chosen bus. It injects reactive power into the system it Q SVC < 0 and absorbs reactive power from the system if Q SVC > 0 [14]. The working range of SVC is between 0MVar and +100MVar [15].…”

“…The parameters of the optimization algorithm can be referred to [2,4,7,14]. Results for transmission loss minimization when load i.e.…”