Evaluation of different strategies for frequency quality control

摘要

Rapid worldwide increase of Variable Generation (VG) brings new challenges for System Operators (SOs) when maintaining power balance and frequency control. SOs can apply different strategies to reach frequency quality goals. However, there is no general framework to compare these strategies in terms of cost. This is important when comparing it with the costs of implementation and costs of market limitations. A contribution is a general setup to evaluate various strategies. To apply this setup, methods to process available low-resolution data to high-resolution data are needed. Another contribution is a setup of these data processing methods. The processing methods are verified by comparing simulated and measured electric frequencies. Using the verified setup as a reference the proposed evaluation method can be applied. An optimal strategy is one improving frequency quality at lowest possible cost. The proposed setup is tested using a Nordic Synchronous power system case study. The case study is a strategy change of the Ramping Rate (RR) of Transmission between Asynchronous Areas (TBAA).