1 1 disadvantage of low power factor. It is based on a double fed machine with a conventional three.
A synchronous condenser or a synchronous compensator is a synchronous motor running without a mechanical load.
Synchronous condenser diagram.
It can generate or absorb reactive volt ampere var by varying the excitation of its field winding. When the generator has reached operating synchronous speed it will be synchronized with the transmission network and the machine is operated as a motor providing reactive and short circuit power to the. In electrical engineering a synchronous condenser sometimes called a synchronous capacitor or synchronous compensator is a dc excited synchronous motor whose shaft is not connected to anything but. However it may be an interesting shunt device to compensate reactive power continuously and relatively large amounts of active power for a short time. Synchronous condenser installation at templestowe substation melbourne victoria australia. In previous years these motors were only used for p f improvements of the system not to run a load.
The adjustable speed synchronous condenser is not exactly a facts compensator as it contains an electric machine. They play an ever increasing role in the world of renewables where shutting down conventional power plants leads to a worsening of electricity supply. The kinetic energy stored in the rotor of a synchronous condenser contributes to the total inertia of the power system and is thus also beneficial from a frequency control perspective. The basic topology of this compensator is shown in fig. It can be made to take a leading current with over excitation of its field winding. Hence over excited synchronous motor operating on no load condition is called as synchronous condenser or synchronous capacitor.
Synchronous capacitor or synchronous condenser phasor diagram. This is shown in the phasor diagram fig. The synchronous condenser is the more advanced technique of improving power factor than a static capacitor bank but power factor improvement by synchronous condenser below 500 kvar is not economical than that by a static capacitor bank. For major power network we use synchronous condensers for the purpose but for comparatively lower rated systems we usually employ capacitor bank. The siemens synchronous condenser solution comprises a horizontal synchronous generator connected to the high voltage transmission network via a step up transformer. Synchronous condenser can support the power system voltage during prolonged voltage sags by increasing the network inertia.
They can therefore be utilized as var compensating devices in situations where voltage. It is started up and stopped with a frequency controlled electric motor pony motor or a starting frequency converter. This is the property due to which synchronous motor is used as a phase advancer or as. The phasor diagrams of synchronous motor working in over excited conditions without any load shown below. Built by asea in 1966 the unit is hydrogen cooled and capable of three phase power at 125 mva. This characteristics is similar to a normal capacitor which takes leading power factor current.
A synchronous motor bought to run a load can be functioned overexcited to deliver reactive power q for an electrical system. Synchronous condensers also called synchronous capacitors or synchronous compensators are traditional synchronous machines which work as motors without an active load and are able to provide both reactive power and inertia to the grid.
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