Enhancement of Critical Clearing Time to test system IEEE-9 by using combination or distribution Static Synchronous Compensators (STATCOMs)

This paper aims to use Static Synchronous Compensators (STATCOMs) in two cases combined or distributed, where it act in the first case as one compensator at one placement of electrical network, for the same required power of studied network, and distributed compensators as multi-STACOM with suitable powers in the second case where they are connected at the best placements of studied network, for improving critical clearing time of IEEE-9 nodes test system and its transient stability.

Enhancement of voltage Stability in power transmission networks using Static Compensator (STATCOM( based on Fuzzy logic

The fluctuation of voltage cannot be tolerant for equipment in modern industrial plants such as lighting loads, PLC, robots, and another equipment, which exist in transmission and distribution systems, so we should use proper aids to regulate voltage and control it. In this study a (± 25Mvar) Static Synchronous Compensator (STATCOM) is used to enhance voltage stability in a (66 kv, 1500MV.A) power transmission network. The STATCOM in this study regulates the voltage of the transmission network for changing in voltage (± 7%) from the nominal value. A model of the power transmission system and another model of the STATCOM device, which will enhance the stability of voltage are designed in MATLAB/Simulink. And the control of (STATCOM) is achieved by using a Proportional Integrative (PI) controller with Fuzzy Logic Supervisor to adjust the parameters in PI controller in DC voltage regulator during transient states of load changing which gives more stability in DC voltage. The results of the simulation are shown. This study demonstrates the ability of STATCOM for regulating the voltage of the transmission system by injecting and absorbing reactive power from the power system, and the DC voltage be more stability by using Fuzzy Logic supervisor.

STATCOM for renewable energy sources connection with the power system (Case study: Hassia Industrial City)

In this paper, we have suggested the STATCOM (STATic synchronous COMpensator) to connect PV-solar (or wind) frame to the power system for the Hassia industrial city which we chose as a case study. This frame will provide the city with the required power, improve the power quality and inject the redundant to the power system.

Developing Algorithm and Program for Power Flow Analysis in Power System with STATCOM*

Keeping the voltage within the required limits is one of the key issues of operating a power system. since the voltage in electrical power system is affected significantly by changes of loads and equivalent circuit of the power system, there is a need to regulate the voltage with high control ability. Because of the growing use of FACTS in General and STATCOM among them in power systems to improve voltage stability, and because of the need for software that is not always available, the aim of research is to develop a mathematical model, algorithm and software for load flow analysis at the steady state of power system includes static synchronous compensator STATCOM. The Jacobian matrix in the Newton –Raphson algorithm, which is the relationship between voltage and power mismatches, is extended with the STATCOM variables to adjust the voltage and control of the reactive power witch is injected or absorbed at the point of common coupling, with high controlability. A Complete software has been developed that includes comprehensive control facilities and exhibits very strong convergence characteristics. A Sophisticated algorithm has been verified and the effectiveness of the program is tested by its application to a number of standard power systems including the IEEE 5-bus system, and Syrian transmission network 400 kV.

Impact of Reactive Compensators on Performance of Distance Protective Relays

This paper tries to clarify the impact of parallel and serial compensation of power transmission lines on the performance of distance relays which protect these lines. To this end, power system analysis software (NEPLAN) will be used for explaining distance relay behavior in the presence of different parallel or serial reactive power compensators, with main types of faults that may occur in different locations on the protected line. In this paper, Syrian power transmission network is simulated using (NEPLAN) software, and three reactive power compensators: parallel (STATCOM), serial (TCSC), and unified (UPFC), are used to compensate reactive power on transmission line. Several simulations, in many cases are carried out to illustrate the impact of fault type and location on the measured impedance seen by the distance relay. The objective of identifying the impact of reactive compensators on fault impedance seen by distance relay (i.e. fault location), is to determine the possible ways to resolve the problem and improve the performance of transmission line protection.