Jännitekorjausmenetelmien

Jännitekorjausmenetelmät, known in English as voltage regulation methods, refer to techniques used to stabilize and control the voltage level in electrical power systems. Maintaining a consistent voltage is crucial for the reliable operation of electrical equipment and the overall stability of the grid. Fluctuations in voltage can arise from various factors, including changes in load demand, generator output, and the presence of reactive power.

One common method is the use of tap changers on transformers. These devices allow for adjustments to the transformer's winding ratio, thereby altering the output voltage. Tap changers can be operated under load (OLTC) or off-load, with OLTCs providing continuous voltage regulation without interrupting power flow. Another important technique involves reactive power compensation. This is achieved through devices like capacitor banks and reactors, which inject or absorb reactive power to counteract voltage drops or rises. Synchronous condensers, which are essentially synchronous motors operating without a mechanical load, can also provide reactive power support and voltage control.

Advanced methods include the use of static var compensators (SVCs) and static synchronous compensators (STATCOMs). SVCs are thyristor-controlled compensation devices that provide rapid reactive power control. STATCOMs, a more modern and flexible technology, use voltage-sourced converters to provide both inductive and capacitive reactive power, offering superior voltage regulation capabilities. These methods are essential for ensuring power quality and grid reliability in modern electrical networks.