Add item Dynamic Line Ratings

Author: jinningwang

_pages/changelog.md

@@ -13,8 +13,8 @@ toc:
 
 ### 05-15
 
-- Add [2025 Iberian Peninsula blackout](/projects/2025-iberian-peninsula-blackout) in Events
-- Add [Improve Transmission Line Ratings](/projects/improve-transmission-line-ratings) in Events
+- Add events: [2025 Iberian Peninsula blackout](/projects/2025-iberian-peninsula-blackout) and [Improve Transmission Line Ratings](/projects/improve-transmission-line-ratings)
+- Add item: <u>Dynamic Line Ratings</u> in [Dynamic Line Ratings](/wiki/dynamic-line-ratings) and some relevant definitions by MISO
 
 ### 05-12
 

_wiki/dynamic-line-ratings.md

@@ -0,0 +1,35 @@
+---
+layout: distill
+title: Dynamic Line Ratings
+description: Minimum level of system inertia necessary to ensure deployment of frequency responsive reserves.
+tags: inertia, frequency, ERCOT, ISO
+category: wiki
+bibliography: papers.bib
+---
+
+**Dynamic Line Ratings (DLRs)** <d-cite key="miso2023ferc881"></d-cite> (p10) by MISO
+
+A transmission facility rating that:
+(1) applies to a time period of not greater than one hour; and 
+(2) reflects up-to-date forecasts of inputs such as (but not limited to) ambient air temperature, wind, solar heating intensity, transmission line tension, or transmission line sag.
+
+**Ambient-Adjusted Ratings (AARs)** <d-cite key="miso2023ferc881"></d-cite> (p10) by MISO
+
+A transmission facility rating that:
+(1) applies to a time period of not greater than one hour;
+(2) reflects an up-to-date forecast of ambient air temperature across the time period to which the rating applies;
+(3) reflects the absence of solar heating during nighttime periods where the local sunrise/sunset times used to determine daytime and nighttime periods are updated at least monthly, if not more frequently; and 
+(4) is calculated at least each hour, if not more frequently.
+
+**Emergency Rating** <d-cite key="miso2023ferc881"></d-cite> (p10) by MISO
+
+A transmission facility rating that reflects operation for a specified, finite period, rather than reflecting continuous operation. 
+An emergency rating may assume acceptable loss of equipment life or other physical or safety limitations for the equipment involved 
+
+**Facility** <d-cite key="miso2023ferc881"></d-cite> (p10) by MISO
+
+A set of electrical equipment ratings that collectively operates as a single bulk electric system element (e.g., transformers, relay protective devices, terminal equipment, and series and shunt compensation devices) 
+
+**Facility Rating** <d-cite key="miso2023ferc881"></d-cite> (p10) by MISO
+
+The maximum or minimum voltage, current, frequency, or real or reactive power flow through a facility that does not violate the applicable equipment rating of any equipment comprising the facility

assets/bibliography/papers.bib

@@ -1475,3 +1475,14 @@ @online{leader2025iberian
 	url = {https://sepapower.org/knowledge/april-2025-iberian-blackout/},
 	html = {https://sepapower.org/knowledge/april-2025-iberian-blackout/},
 }
+
+@online{miso2023ferc881,
+  abbr = {Industry},
+  author={MISO},
+  title = {FERC Order 881 Update},
+  year         = {2023},
+  month        = {Aug},
+  day          = {22},
+	pdf = {https://cdn.misoenergy.org/20230822%20RSC%20Item%2005%20FERC%20Order%20881%20Update%20(RSC%202018%2054A)%20(RSC%202021%2054B)629904.pdf},
+  url = {https://cdn.misoenergy.org/20230822%20RSC%20Item%2005%20FERC%20Order%20881%20Update%20(RSC%202018%2054A)%20(RSC%202021%2054B)629904.pdf},
+}