Thanks for the kindly explanation. That helps a lot. Best, Bainan
From: [email protected] [mailto:[email protected]] On Behalf Of Ray Zimmerman Sent: Friday, March 16, 2018 6:52 AM To: MATPOWER discussion forum <[email protected]> Subject: Re: Default length of the 'time period' In MOST, the length of the time period is set by the Delta_T field of the md input struct (see Table 5-6 in the MOST User’s Manual<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.pserc.cornell.edu_matpower_docs_MOST-2Dmanual-2D1.0.pdf&d=DwMFaQ&c=f_hce7QtucnhnFZbRZTIlH6nx5mag1_14FtEFKPmHCI&r=GT1sxYZuEA8wCoyfVcH4pg&m=q0k51gMJfsi5DYTXioAwyifkVa70128j2xt9Ti2mv7k&s=tL_BDAznxgKoquWnQlyqdnIIJfn32QAQ6xo_NoeH13c&e=>). The default is 1 (1 hour), but you can feel free to change it. The inter-temporal ramp limit will still be calculated from RAMP_30. For example, by default the limit on the period-to-period dispatch change is 2*RAMP_30. If you were to set Delta_T to 1/6, that is a 10-minute time step, then the period-to-period dispatch change would be limited to RAMP_30 / 3. The loadmd() function does not have an input that lets you alter the Delta_T field, so you’ll have to modify it manually after calling loadmd(). Ray On Mar 15, 2018, at 3:46 PM, Bainan Xia <[email protected]<mailto:[email protected]>> wrote: Hi, I’ve got a naïve question on the length of the ‘time period’ in Matpower. Previously, I presume it to be 1 hour. However, when adding ramp constraints through parameter RAMP_30, which defines the ramp capability in 30mins (not in terms of time periods/units), I found none of those constraints actually bind according to the result. Hence, I’m wondering what is the default length of ‘time period’ in Matpower and whether there is a way to change it. Thanks for the help☺ Best, Bainan
