Fuzzy Logic based STATCOM for transient stability

Modern power systems have become very complex and this complexity presents new challenges to power system stability in general, and in particular, to the aspects of transient stability. Transient stability control plays a significant role in ensuring the stable operation of power systems in the

Project Title

Fuzzy Logic based STATCOM for transient stability

Project Area of Specialization

Artificial Intelligence

Project Summary

Modern power systems have become very complex and this complexity presents new challenges to power system stability in general, and in particular, to the aspects of transient
stability. Transient stability control plays a significant role in ensuring the stable operation of power systems in the event of disturbances and faults. The purpose of this project is to exploit fuzzy logic to enhance the capability of STATCOM against transient disturbances.
The basic idea is to refrain the power angle being getting disturbed. The rotor of a generator rotates at a specific angle with respect to the stator field and the angular position is proportional to the power generated. This power angle needs to remain in a specific range for the synchronous and stable operation of a generator and hence the power system. While transient interrupts including Short Circuits, line outages, load changes and plant shut down etc. cause the generator to vary power angle and even cross its specified limit and generator may lost its synchronism with the rest of the system this may ultimately lead to blackout of whole system.
Thus efficient and effective measures are necessary against transients in order to avoid the generator losing it’s synchronism.
Our project proposes an efficient technique for remotely compensating the transient interrupts while hindering them reaching the generators, by using a STATCOM. The STATCOM will provide or absorb the extra power, following the power flow theory. The Fuzzy Control is fast because of it’s non-linear nature so it can control STATCOM to provide compensation against transient interrupts. A three phase SPWM inverter with the DC capacitor bank is developed to
provide the compensated power. Power is continuously monitored via PT and CT and processed in a microcontroller and the controller will change the value of angle and magnitude of STATCOM voltage in accordance with the required power.
 

Project Objectives

1. Design of STATCOM device for
three phase 1kVAR load.

2. Enhancement of response speed
of STATCOM using Fuzzy control.

3. To increase the line voltage
stability against the transient
disturbances
 

Project Implementation Method

A three phase six pulse STATCOM is designed employing 180° conduction with bipolar SPWM technique. The response speed will be improved by employing a real time fuzzy logic closed loop control. The STATCOM will be synchronized with the grid using PLL(Phased Locked Loop) technique. The current and voltage are monitored using CT and PTs which is used for power calculations and the fuzzy logic will compute frequency and modulation index for the SPWM pulses in order to provide close loop control
 

Benefits of the Project

• STATCOM is installed to support the
electrical networks that have a poor
voltage regulation.
• STATCOM brings the power system
stability against transient disturbances.
• It is a active device and has a faster
response time than SVC’s
• It shows good performance in low
voltage as compared to SVC’s
 

Technical Details of Final Deliverable

It includes a STATCOM which is a three phase inverter synchronized with the grid and using capacitor bank as a reactive power source. The CT and VT will calculate the value of current and voltage of grid. the microcontroller will take these values and calculate the active and reactive power. it will compare the reactive power with the previously recorded power and find the power demand . if the power is surplus the capacitor bank will absorb the power and vice versa. this will be done by generating spwm pulses through microcontroller of certain modulation index and phase angle. this will in turn compensate the reactive power. 

Final Deliverable of the Project

HW/SW integrated system

Type of Industry

Energy , Others

Technologies

Artificial Intelligence(AI)

Sustainable Development Goals

Industry, Innovation and Infrastructure

Required Resources

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