J line Sending Bus. Present the block diagram of proposed Fuzzy logic controller. The three phase fault that we study here is a dead short circuit of all the three lines not involving the land. Test results using different power system models are presented throughout the thesis to illustrate the effectiveness of Unified Power Flow Controller. The series transformer reactance. Farther, this intelligentmethod proved to be more beneficial than existing traditional methods such as PSS.

There are frequent disturbances in a power system due to its dynamic nature. D in the field of power engineering from the Ferdowsi University of Mashhad, Iran in , , respectively. These disturbances must be controlled so that they cannot lead the system to an unsteady condition. Investigation of advanced control for the unified power flow controller UPFC. J line Sending Bus. The Fuzzy controller provides stabilizer signal in order to damping systemoscillations. UPFC parameters Value x k 0.

The value of injected voltage amplitude p. Currently, he has worked at the Khavaran Nasr Company. In factFuzzy logic controller is one of the most effective operations of fuzzy set theory; its keycharacteristics are the usage of linguistic variables relatively than numerical variables.

upfc modelling thesis

Case 1- Without three phase fault Case 2- With three phase fault Fig. Recent past has witnessed the advancements of Power System Stabilizers PSS and their variants for enhancing the stability of power system.

Simulation results along with some observations are discussed in Section 4.

upfc modelling thesis

Result associated with them isgiven in this chapter. Dissimilar types of arrangement of lag-lead compensator basedPSS are discussed in details [3].


upfc modelling thesis

It has operatedsuccessfully for the designing and tuning of conventional power system stabilizers. A three phase fault is considered. Computer simulation and experimental implementation of a UPFC using DS data acquisition board have been used to verify the proposed control strategies.

The impact of a change in the system short circuit level on the UPFC operation and the size of the feasible area has also been investigated. Wash out This block consists of two wash-out filters with time constant 10second.

We have no references for this item. In this network active and reactive power of buses load 9, 10 and 14 are changed.

Load flow studies with UPFC power injection model – ethesis

This model is usually used for UPFC modeling. The synchronous generator is represented by model 1, i. Recently developed FACTS flexible alternating current transmission system provide steadfast solutions to avert these issues in power quality. The active power losses have been shows in Figure 8 for the case when varying both the injected voltage magnitude r from 0.

Help Center Find new research papers in: In parliamentary law to providing stabilizer signal, the output of obtained model reference ofpower system is compared with output of the actual power system and the error signal is fed to afuzzy controller. Steady state model referred as an injection model is described in [5]. An exact power injection model is proposed which is based on the polar representation of the UPFC parameters and includes the reactive power capability of the shunt inverter.

Three modern controllers have been designed and tested for controlling the UPFC in a power flow mode for the series part and a voltage control mode for the shunt part.


Investigation of advanced control for the unified power flow controller (UPFC)

Injection model of the UPFC [3]. Search the history of over billion web pages on the Internet.

He received the B. The Power System Stabilizer implemented consists, as shownin Figure 3, of three main functional blocks: Also the voltage magnitude of bus 14 have been shows in Figure 9 for the case when varying both injected reactive power Qconvi f rom to MVar and the injected voltage magnitude r from to 0.

First term without three phase fault and second condition, with threephase fault.

Load flow studies with UPFC power injection model

A high exciter gain block 2 ,without transient gain reduction or derivate feedback, is recycled. The UPFC unified power flow controller is one of the modern power electronics devices that can be used for the control of real and reactive power in a transmission line. Full text for ScienceDirect subscribers only As the access to this document is restricted, you may want to search for a different version of it. Exchange of contracted amounts of real power has been in vogue for a long time for economicand security reason.

Shunt Side Series Side 1.