In this article we will discuss about:- 1. Functional Control Mode of UPFC 2. Operating Modes of UPFC 3. Control System. Functional Control Mode of UPFC: i. Shunt Controller: a. Reactive (VAR) control side b. Automatic voltage control mode ii. Series Convector: a. Direct voltage injection mode b. Line impedance compensation mode c. Bus voltage regulation and control mode d. [...]
In this article we will discuss about:- 1. Meaning of DVR 2. Basic Configuration of DVR 3. DVR Characteristics 4. Equations 5. Operating Mode 6. Voltage Injection Methods. Contents: Meaning of DVR Basic Configuration of DVR DVR Characteristics Equations Related to DVR Operating Mode of DVR Voltage Injection Methods of DVR 1. Meaning of DVR: Among the power quality problems [...]
A Unified Power Quality Conditioner (UPQC) is a device that is similar in construction to a Unified Power Flow Conditioner (UPFC). The UPQC, just as in a UPFC, employs two voltage source inverters (VSIs) that connected to a dc energy storage capacitor. One of these two VSIs is connected in series with ac line while the other is connected in [...]
In this article we will discuss about the load frequency control in power system. In a power system, both active and reactive power demands continually vary with the rising or falling trend. Power input (steam input to turbo-generators or water input to hydro- generators) must, therefore, be continuously regulated to match the active power demand; otherwise the machine speed will [...]
In this article we will discuss about:- 1. Meaning of Numerical Control 2. Programmed Automation and Numerical Control 3. Advantages 4. Features 5. Machine Control Unit (MCU) 6. Design. Meaning of Numerical Control: The control of a machine tool by means of recorded information on punched tape or cards is known as numerical control, because information supplied to the control [...]