Abstract
Chilean National Research and Development Agency (ANID) ANID/FONDECYT/11160228 ANID/FONDECYT/1201676 ANID/FONDAP/15110019
Highlights
These results show that the proposed methodology is able to identify risky operating conditions in terms of frequency stability, and to propose a reserve reallocation considering fast frequency response (FFR) contribution of renewable energy sources (RES) that allows avoiding the activation of Under Frequency Load Shedding Schemes (UFLSSs)
Our proposal included the introduction of novel indices for characterizing the system frequency performance in terms of key system operational features
These indices can be used to identify system operating conditions where the FFR of RES should be mandatory in order to ensure frequency stability
Summary
The associate editor coordinating the review of this manuscript and approving it for publication was Zhiyi Li. RIF Index for characterizing the increase in system ramping capability that can be achieved by a cost-efficient redispatch for avoiding the activation of UFLSS rsys System ramp capacity (MW/s). B. PARAMETERS Ci Variable generating cost of unit i ($/MW) f0 Nominal system frequency (Hz) Pi Capacity of unit i (MW) Pi Minimum stable generation of unit i (MW). C. Rahmann et al.: Methodological Approach for Defining Frequency Related Grid Requirements in Low-Carbon Power Systems ri Approximated ramp rate of synchronous generator i (MW/s) tdi Time delay of the governors response of synchronous generator i (s). D. VARIABLES Pki Redispatch of unit i in iteration k (MW) Phmax Maximum power imbalance in hour h in case of the sudden trip of a generating unit (MW). System ramping capability in hour h obtained after applying the proposed methodology (MW/s) tmh,ijn,k. Time for reaching the frequency nadir following contingency j in iteration k for hour h (s) fmhi,nj,k Frequency nadir following contingency j in iteration k for hour h (Hz)
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