What is STATCOM in power system?
What is STATCOM in power system?
A static synchronous compensator (STATCOM), also known as a static synchronous condenser (STATCON), is a regulating device used on alternating current electricity transmission networks.
Why STATCOM is needed?
The Static Synchronous Compensator (STATCOM) is used in an HVDC system to provide reactive power compensation. It makes use of the Voltage Source Converter (VSC) to synthesize a controllable sinusoidal voltage at the fundamental frequency.
What is STATCOM operation?
A STATCOM is a controlled reactive-power source. It provides the desired reactive-power generation and absorption entirely by means of electronic processing of the voltage and current waveforms in a voltage-source converter (VSC). PRINCIPLE OF OPERATION. Ø A STATCOM is a controlled reactive-power source.
What is the difference between SVC and STATCOM?
The main difference between a STATCOM and an SVC is the way they operate: a STATCOM works as a controllable voltage source while an SVC works as a dynamically controllable reactance connected in parallel. In a STATCOM the speed of response is limited by the commutation frequency of the IGBT’s (normally 1 kHz).
Is STATCOM an inverter?
PV-STATCOM: A New Smart Inverter for Voltage Control in Distribution Systems. During a critical system disturbance in the daytime, the smart inverter discontinues its real power generation function temporarily (for about a few seconds), and releases its entire inverter capacity for STATCOM operation.
What is STATCOM and SVC?
Both SVC (Static Var Compensator) and STATCOM (Static Synchronous Compensator) are important equipment of reactive compensation, which are compared in voltage supporting, improving the transient stability and transmission limit, and damping low frequency oscillation.
How much does a STATCOM cost?
An average cost for SVCs that allow rapid switching between capacitors and reactors varies from $40 to $60 per kVAR. An SVC with only capacitors cost less at $30 to $50 per kVAR. STATCOMs are power electro- nics-based SVCs.
What is the reason for voltage collapse?
(b) If adjacent generators are overexcited and overloaded then it leads to voltage collapse due to increase in reactive power loss. (c) Due to large load demand or large rapid magnitude of power transfer, reactive power demand increases and voltage reduces.
How is the STATCOM superior to SVC?
Secondly, STATCOM is much better than SVC in improving the transient stability and transmission limit. Thirdly, on the damping low frequency oscillation, STATCOM is much better than SVC as SVC and STATCOM have the same capacity, and performs similarly with SVC as the two have the same controllable capacity.
What are the problems with series compensation?
Problem associated with Series capacitor The series compensated line produces series resonance at frequencies lower than power frequencies. This is known as sub-synchronous resonance. The sub-synchronous produces mechanical stress due to which high torsional stress occurs in the rotor shaft.
How does a SVC work?
In transmission applications, the SVC is used to regulate the grid voltage. If the power system’s reactive load is capacitive (leading), the SVC will use thyristor controlled reactors to consume VARs from the system, lowering the system voltage.
How much does a synchronous condenser cost?
Normally, the mean cost for a synchronous condenser is between $10 to $40 per kVAR and the maintenance cost ranges from about $0.4 to $0.8/kVAR per year.