implementation of statcom and reactive power compensation
TRANSCRIPT
IMPLEMENTATION OF STATCOM
PROJECTEES- NISHANT SINGH KAMAL KANT YADAVPRASHANT SHEKHAR SHAILESH SINGHProject Guide :Manish
Pathak
Today · changing electric power systems create a growing need for Reliability, flexibility, fast response and accuracy.
Flexible Alternating Current Transmission Systems are new devices emanating from recent innovative technologies that are maintain altering voltage phase angle
Objective
Electrical Power
In this we are compensating the Reactive power
A. Active Power
B. Reactive Power
C. Apparent Power
Reactive power
What is Reactive power.
Need
Importance
Purpose
Sources
In power system, real power and reactive power is controlled by the voltage and phase angle difference between the sending end and receiving end respectively. Impedance of the transmission line can also be used to control real and reactive power. Flexible AC Transmission Systems (FACTS) are used to improve the power transfer capability of transmission line.
EXISTING SYSTEM
THYRISTOR CONTROL REACTOR THYRISTOR SWITCHED CAPACITOR STATIC VAR COMPENSATOR THYRISTOR SWITCHED
SERIESCOMPENSATOR STATIC COMPENSATOR SELF COMMUTATED COMPENSATOR UNIFIED POWER FLOW CONTROLLER
Different fact devices
INCREASE THE CAPABILITY OF LOADING OF LINES TO THEIR THERMAL CAPABILITES
INCREASE THE SYSTEM SECURITY THROUGH RISING THEIR TRANSIENT STABILITY LIMIT CONTROL OF POWER FLOW AS ORDERED REDUCE REACTIVE POWER FLOW
Benefits of devices
Static synchronous compensator, is a regulating device used on ac current electricity transmission networks. It is based on a power electronics voltage-source converter and can act as either a source or sink of reactive AC power to an electricity network. If connected to a source of power it can also provide active AC power It is a member of the FACTS family of devices.
Static Synchronous CompensatorStatcom
Structure of Statcom
STATCOM (Static Synchronous Compensator)
Single line diagram ofreactive power comp. using statcom
Components mainly used are :
Coupling Transformer
Voltage source converter
Capacitor bank
STATCOM controller
OPERATING PRINCIPLE
SIMULATION CIRCUIT
Statcom waveform
Svc waveform
14-Bus System without statcom
Current and voltage Waveform(without statcom)
14 –Bus System with statcom
Current and voltage waveform(with statcom)
Summary of reactive power in various buses
Statcom in Wind Power Plant
Statcom with PI Controller
Statcom with Fuzzy Logic
DRAWBACK OF THE PROPOSED CONTROL STRATEGY HARMONIC COMPENSATION IS NOT
ACHIEVED
PRESENCE OF FOUR PI CONTROLLERS MAKES THE SYSTEM SLOW IN RESPONSE
IT ALSO REDUSES THE STABILITY
CONTINUOUS AND DYNAMIC VOLTAGECONTROL HIGH EFFICIENCY HIGH DYNAMIC VERY FAST RESPONSE TIME SINGLE PHASE CONTROL FOR UNBALANCED
LOADS REACTIVE POWER COMPENSATION
Main Advantages
The static synchronous compensator (STATCOM) is increasingly popular in power system application. In general, power factor and stability of the utility system can be improved by STATCOM.
Statcom is able to provide rated current under reduced voltage condition
Why this device is used
Voltage support and control Voltage fluctuation and flicker mitigation Unsymmetrical load balancing Power factor correction Active harmonics cancellation Improve transient stability of the power
system
Continue….!
The STATCOM has the ability to provide more capacitive reactive power during faults, or when the system voltage drops abnormally, compared to ordinary static var compensator. This is because the maximum capacitive reactive power generated by a STATCOM decreases linearly with system voltage, while that of the SVC is proportional to the square of the voltage. Also, the STATCOM has a faster response as it has no time delay associated with thyristor firing.
Statcom vs. SVC
33
comparison
www.8051.in
COMPARISON OF VI CHARACTERISTICS OF SVC AND
STATCOM
Ultra dynamic response (<10ms) No steps Ind. + cap. Capabilities Low harmonics no filters required Cheaper than SVC below §50MVAR
Characteristics of Statcom
Future work can involve multilevel STATACOM to reduce harmonics in the system.Also more practical sophisticated method may be proposed to adress the minimization of STATCOM capacity.
STATCOM can be implemented with Predictive Controller.
Future Work
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