As the increasing utilization of wind resources and lightweight gas turbine units, the power grid is shifting towards a situation with declining system inertia, which causes a larger frequency deviation after disturbances and threatens the reliability of the grid. Thus, we devote this work to develop an appropriate tool to determine the economic value of the inertia to the systems. To do so, we discretize and integrate the system dynamic equations into a modified version of the linear security-constrained unit commitment framework. Since the fast-acting storage devices are able to respond in a very short time, we also develop a storage control scheme to mimic the inertia and to provide primary frequency responses. We perform extensive studies on the IEEE 24-bus reliability test system and present some illustrative simulation results to demonstrate the effectiveness of the proposed method to assess the economic value of the power system inertia.

10aRM15-0021 aXu, Ti1 aJang, Wonhyeok1 aOverbye, Thomas, J. uhttps://certs.lbl.gov/publications/economic-evaluation-tool-inertia01531nas a2200241 4500008003900000022001400039245007500053210006900128260001100197300001600208490000700224520080300231653001001034653002401044653002901068653002801097653001301125653001301138100002201151700001901173700002401192856007301216 2014 d a0885-895000aEquivalent Line Limit Calculation for Power System Equivalent Networks0 aEquivalent Line Limit Calculation for Power System Equivalent Ne c9/2014 a2338 - 23460 v293 aThis paper focuses on the relatively unexplored subject of creating limit-preserving equivalents (LPEs). There is a push to develop LPEs for power system interconnections to be used in markets and reliability studies. The equivalents that exist for these interconnections do not capture thermal limits of equivalent lines, which results in their transmission limits being significantly different from the original interconnection limits. Assigning noninfinite and nonzero limits to equivalent lines is the niche of this paper. This is done by considering an unloaded network, which is operating point independent. A solution method is developed and discussed, which is capable of assigning lower, best, and upper estimates for equivalent line limits and is proposed for use towards developing LPEs.10aCERTS10aelectricity markets10apower system reliability10areliability and markets10aRM11-00110aSuperOPF1 aMohapatra, Saurav1 aJang, Wonhyeok1 aOverbye, Thomas, J. uhttps://certs.lbl.gov/publications/equivalent-line-limit-calculation