Design of frequency controller for Rihand-Dei hi HVDC Project

The Rihand-Delhi HVDC Project is an 814 km long bipolar transmission project. This system will be utilized for transmission of power from the coal fired thermal generation complex at Rihand and Singrauli to the National Capital Region around New Delhi. The scheme includes all the normal controllers typical for an KVDC transmission scheme. The higher level controls include a power modulation control and a frequency controller. Frequency controllers are generally adopted in HVDC schemes where one of the converters are connected to an isolated system of synchronous machines, describe the frequency controller for a project where isolation of a converter on to a local AC system is not a normal mode of operation, but nevertheless can take place under certain system contingencies