The basic Thyristor Controlled Series Capacitor scheme was proposed in 1986 by Vithayathil with others as a method of “rapid adjustment of network impedance”. A TCSC can be defined as a capacitive reactance compensator which consists of a series capacitor bank shunted by a thyristor-controlled reactor in order to provide a smoothly variable series capacitive […]
THYRISTOR CONTROLLED SERIES COMPENSATOR TCSC Read More »
STATCOM is a Static synchronous generator operated as a shunt-connected static VAR compensator whose capacitive or inductive output current can be controlled independent of the ac system voltage. STATCOM is one of the key FACTS Controllers. A STATCOM is a controlled reactive power source. It provides voltage support by generating or absorbing capacitors banks. It
STATIC SYNCHRONOUS COMPENSATOR STATCOM Read More »
ADVANTAGES OF PHOTOVOLTAICS: Fuel source is vast and essentially infinite No emissions, no combustion or radioactive fuel for disposal (does not contribute perceptibly to global climate change or pollution) Low operating costs (no fuel) No moving parts (no wear) Ambient temperature operation (no high temperature corrosion or safety issues) High reliability in modules (>20 years)
ADVANTAGES AND DISADVANTAGES OF PHOTOVOLTAICS Read More »
The shunt component is responsible for mitigating the power quality (PQ) problems caused by the consumer: poor power factor, load harmonic currents, load unbalance, DC offset, etc. The shunt active filter is responsible for power factor correction, compensation of load current harmonics and unbalances. It maintains constant average voltage across the dc storage capacitor Cdc.
OPERATION OF THREE PHASE THREE WINDINGS UNIFIED POWER QUALITY CONDITIONER Read More »
HVDC links may be broadly classified into the following categories: Monopolar Links Bipolar Links Homopolar Links The basic configuration of a monopolar link is shown in figure. It uses one conductor, usually of negative polarity. The return path is provided by ground or water. Cost considerations often lead to the use of such systems, particularly
CLASSIFICATION OF HVDC LINKS Read More »
Figure: A schematic of a bipolar HVDC system identifying main components
COMPONENTS OF HIGH VOLTAGE DC TRANSMISSION SYSTEM Read More »
1) CONNECTING REMOTE GENERATION Some energy sources, such as hydro and solar power, are often located hundreds or thousands kilometers away from the load centers. HVDC will reliably deliver electricity generated from mountain tops, deserts and seas across vast distances with low losses. 2) INTERCONNECTING GRIDS Connecting AC grids is done for stabilization purposes and
APPLICATIONS OF HIGH VOLTAGE DC TRANSMISSION Read More »
Recent developments of FACTS research have led to a new device: the Interline Power Flow Controller (IPFC). This element consists of two (or more) series voltage source converter-based devices (SSSCs) installed in two (or more) lines and connected at their DC terminals. Thus, in addition to serially compensating the reactive power, each SSSC can provide
INTERLINE POWER FLOW CONTROLLER IPFC Read More »
The FACTS technology is not represented by a single high-power controlling device, but it is a collection of all the controllers, these individually or in coordination with the others give the possibility to fast control one or more of the interdependent parameters that influence the operation of transmission networks. These parameters include e.g. the line
Since the development of interconnection of large electric power systems, it has been the spontaneous system oscillations at very low frequencies in the range of 0.2–3.0 Hz. After starts, it would continue for a long period of time. In certain cases, it continues to develop causing system separation due to the lack of damping of
NEED FOR FACTS DEVICES Read More »