Thanks for the explanation! I’ve figured out which constraint is actually binding in my case.
Best, Bainan From: bounce-122375618-80810...@list.cornell.edu [mailto:bounce-122375618-80810...@list.cornell.edu] On Behalf Of Ray Zimmerman Sent: Tuesday, March 13, 2018 7:11 AM To: MATPOWER discussion forum <matpowe...@list.cornell.edu> Subject: MOST and ramp rates (was Re: Ramp AGC) That’s basically true. To be more specific, RAMP_10 is used to determine the amount that a contingency dispatch can deviate from the corresponding base case, or to limit the reserve supplied by a unit when using fixed zonal reserve requirements. And RAMP_30 is used to determine how much a base case dispatch in a particular period can deviate from the base case dispatches in adjacent periods. And RAMP_AGC is not currently used for anything. In MOST there are essentially two types of “reserve”: (1) contingency reserve, and (2) load-following ramp reserve. The contingency reserve, limited by RAMP_10, can be handled in one of two ways, either by specifying fixed zonal reserve requirements (in a deterministic problem) or by specifying explicit contingencies that must be covered (in a stochastic problem). This is discussed in Section 3.2 of 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=3ukhTDKSBAjZJsjXOVK0QyYkxQobl6nvuDenTyD6_y8&s=klrJlDjFDYFq0im5Yw3ZQuwQ4zLwMqXN8AJ1HW5E6hg&e=> and defined by equations (4.16)–(4.22). The load-following ramp reserve, limited by RAMP_30, is described in Section 3.5 and defined by equations (4.23)–(4.27). Hope this helps, Ray On Mar 8, 2018, at 7:29 PM, Stephen Suffian <stephen.suff...@gmail.com<mailto:stephen.suff...@gmail.com>> wrote: I believe I've seen a similar question asked before. See this link<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.mail-2Darchive.com_matpower-2Dl-40cornell.edu_msg05398.html&d=DwMFaQ&c=f_hce7QtucnhnFZbRZTIlH6nx5mag1_14FtEFKPmHCI&r=GT1sxYZuEA8wCoyfVcH4pg&m=3ukhTDKSBAjZJsjXOVK0QyYkxQobl6nvuDenTyD6_y8&s=b0J5QaRcwXxjLVINLKiP-8HN4j5bFw0qbD1xxf2kths&e=> which indicates that RAMP_10 is used for reserve calculations, RAMP_30 for dispatch scheduling, and RAMP_AGC Is not currently used by matpower according to this link<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.mail-2Darchive.com_matpower-2Dl-40cornell.edu_msg06231.html&d=DwMFaQ&c=f_hce7QtucnhnFZbRZTIlH6nx5mag1_14FtEFKPmHCI&r=GT1sxYZuEA8wCoyfVcH4pg&m=3ukhTDKSBAjZJsjXOVK0QyYkxQobl6nvuDenTyD6_y8&s=sPVLp11H4YW6YsrLrz_1pqZ8iHYwelxrmS6eCnONYhA&e=>. On Thu, Mar 8, 2018 at 6:51 PM, Bainan Xia <b...@intven.com<mailto:b...@intven.com>> wrote: Hi, I’m running a huge power system simulation using MOST recently. I’ve got some information on ‘ramp rate (% of the rated capacity per min)’ for each type of generator from a paper. I would like to add these constraints into my case. I’ve found a field in mpc.gen, called ‘RAMP_AGC’, which is ramp rate for load following/AGC (MW/min). I’m wondering whether that is the right place to fill. Or the following columns ‘RAMP_10’ and ‘RAMP_30’ are the right choices. I’m also a little confused on the difference between ‘RAMP_10’ and ‘RAMP_30’. What does the word ‘reserve’ mean in the documentation. Thanks for the help ☺ Best, Bainan
