Static Voltage Compensator SVC

Static Voltage Compensator is a shunt-connected var generator o absorber whose output is adjusted to exchange capacitive or inductive current. Fig. 3 shows the connection of SVC. It is usually connected between the utility and the generator. SVC can provide reactive power, from 0 to 1 p.u. depending on voltage (Fig. 3). These devices use electronic switches as thyristor, which can open or close in few milliseconds. SVC is considered by some as a lower cost alternative to STATCOM, although this may not be the case if the comparison is made based on the required performance and not just in the MVA size, because for the same contingency and the same system, the required SVC ratings is generally larger than required STATCOM (Hingorain, 1999, Molinas et al, 2008).

Fig. 3. Different topologies of SVC and V-I characteristic. 3.1.2 Static Synchronous Compensator (STATCOM)

Static Synchronous Compensator is a voltage source converter which can inject or absorb reactive current in an AC system, modifying the power flow. STATCOM can provide

Fig. 3. Different topologies of SVC and V-I characteristic. 3.1.2 Static Synchronous Compensator (STATCOM)

Static Synchronous Compensator is a voltage source converter which can inject or absorb reactive current in an AC system, modifying the power flow. STATCOM can provide reactive power independently of the voltage, as shown the voltage-current characteristic in Fig. 4. It comprises a converter, connected in parallel between utility and the generator, and a DC current stage as it is shown in Fig. 4.

STATCOM is the evolution of SVC, but STATCOM have continuous control and can compensate both power factor and voltage simultaneously. Other advantage of STATCOM is its dynamic capacity getting small response times.

Fig. 4. Scheme of the connection of the STATCOM and V-I characteristic.
Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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