Contents
- 1 What is the reason for voltage collapse in power system?
- 2 What is voltage collapse in power system?
- 3 What is voltage stability and voltage collapse?
- 4 What are the methods used to prevent voltage collapse?
- 5 How can voltage collapse be prevented?
- 6 What are the methods to prevent voltage collapse?
- 7 Which is the main cause of voltage instability?
- 8 What is the loading capability?
What is the reason for voltage collapse in power system?
(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.
What is voltage collapse in power system?
Voltage collapse is the process by which the sequence of events accompanying voltage instability leads to an unacceptable voltage drop in a significant part of power system. Catastrophic decrease in voltage leads to loss of stability in large interconnected power system causing blackout.
What is the symptom of voltage collapse?
The main symptoms of voltage collapse are – low voltage profiles, heavy reactive power flows, inadequate reactive support, and heavily loaded systems. The collapse is often precipitated by low-probability single or multiple contingencies.
What is voltage stability and voltage collapse?
Definition: Voltage stability in the power system is defined as the ability of a power system to maintain acceptable voltages at all bus in the system under normal condition and after being subjected to a disturbance. Voltage collapse may be total or partial blackout.
What are the methods used to prevent voltage collapse?
Some of the control actions used as counter measures against voltage collapse is as follows:
- Switching of shunt capacitors.
- Blocking of tap-changing transformers.
- Re-dispatch of generation.
- Rescheduling of generator and pilot bus voltages.
- Secondary voltage regulation.
- Load shedding.
What is the reason for voltage collapse MCQS?
Voltage collapse is typically associated with reactive power demand of load not being met due to shortage in reactive power production and transmission.
How can voltage collapse be prevented?
Some of the control actions used as counter measures against voltage collapse is as follows:
- Switching of shunt capacitors.
- Blocking of tap-changing transformers.
- Re-dispatch of generation.
- Rescheduling of generator and pilot bus voltages.
- Secondary voltage regulation.
- Load shedding.
What are the methods to prevent voltage collapse?
What is the main cause of voltage instability?
The main factor causing voltage instability is inability of the power system to meet the demands for reactive power in the heavily stressed systems to keep desired voltages. Voltage instability in the system generally occurs in the form of a progressive decay in voltage magnitude at some of the buses.
Which is the main cause of voltage instability?
What is the loading capability?
Load capacity refers to the maximum demand, stress, or load that may be placed on a given system under normal or otherwise specified conditions for an extended period of time. In other words, it refers to the capacity of a system to continue to perform its intended function when supporting a specific amount of weight.