# What is the function of automatic generation control?

## What is the function of automatic generation control?

Abstract: Automatic generation control (AGC) is primarily responsible for ensuring the smooth and efficient operation of an electric power system. The main goal of AGC is to keep the operat- ing frequency under prescribed limits and maintain the interchange power at the intended level.

The AGC Load Frequency control subsystem receives new data values from the Data Acquisition subsystem (i.e. SCADA), calculates an Area Control Error and the required changes in generating unit set points. Set point controls are sent through the Data Acquisition subsystem to the power stations.

Load frequency control of an interconnected power system means the interconnection of more than one control area through tie lines. Sudden load variation in any control area of an interconnected power system will lead to both frequency change and tie line power deviation.

### How is the voltage and frequency controlled in automatic generator control?

Therefore, two numbers of loops are provided for each generator. The load frequency control (LFC) loop regulates the real power and frequency, whereas the automatic voltage regulator (AVR) loop takes care of the reactive power and voltage magnitude [1, 2].

The main goals of Load Frequency control (LFC) are, to maintain the real frequency and the desired power output (megawatt) in the interconnected power system and to control the change in tie line power between control areas. Advance control system has a lot of advantage over conventional integral controller.

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. FACTS devices have been used, both for steady state power flow control and dynamic stability control.

#### What is the function of speed changer?

What is the purpose of speed changer? The purpose of speed changer is to restore the frequency to the initial value after operation of the speed governors having steady state characteristics.

What are the objectives of load frequency control?

The main objective of Load Frequency Control (LFC) is to maintain reasonably uniform frequency, to divide the load between generators, and to control the tie-line interchange schedules.

How the voltage of a particular bus can be controlled?

The voltage of a particular bus can be controlled by controlling the. active power of the bus.

## Why the frequency and voltage are to be regulated in power system?

Hence, a power system control is required to maintain a continuous balance between power generation and load demand. Load Frequency Controller and Automatic Voltage Regulator play an important role in maintaining constant frequency and voltage in order to ensure the reliability of electric power.

What is the main cause of voltage instability * 2 points?

The major cause of voltage instability is: Transformer. Generator.

What is the purpose of automatic generation control?

Automatic Generation Control. In an electric power system, automatic generation control (AGC) is a system for adjusting the power output of multiple generators at different power plants, in response to changes in the load. Since a power grid requires that generation and load closely balance moment by moment, frequent adjustments to the output…

### Why do generators need to be controlled in an electric grid?

An electrical grid may have many types of generators and loads; generators must be controlled to maintain stable operation of the system. In an electric power system, automatic generation control (AGC) is a system for adjusting the power output of multiple generators at different power plants, in response to changes in the load.

Which is an example of an AGC generator?

The AGC concept is illustrated by the following schematic in the next slide. Each generator which has a governor can be represented as follows. Note that the value of the load reference P m0 is adjusted by AGC.

What do you call the adjustment of generation?

This adjustment of generation is generally done manually and is often called “tertiary control”. Of course, how this re-adjustment is done is dependent on generation cost, power -pricing mechanism and the ownership of generation.