--- title: "T/F: simulation method for small area forecast" subject: "Transmission and Distribution System Design" chapter: 6 key: "semester_8/transmission_and_distribution_system_design:tf-simulation-small-area-forecast" source: https://www.bctengineer.com/q/semester_8/transmission_and_distribution_system_design/tf-simulation-small-area-forecast site: BCT Engineering --- # T/F: simulation method for small area forecast Transmission and Distribution System Design · Chapter 6: Electrical Load Characteristics and Load Forecast - Asked in: 2078 Chaitra, 1+3 marks; 2070 Magh, 1+3 marks (asked 2 times) - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_8/transmission_and_distribution_system_design/tf-simulation-small-area-forecast - Whole chapter: https://www.bctengineer.com/md/semester_8/transmission_and_distribution_system_design/chapter-6 ## Question State and justify whether the following statement is TRUE or FALSE: For small area load forecasting, simulation method is more suitable. ## Short answer TRUE. Small-area loads do not grow smoothly and often have no load history. The simulation (land-use) method uses zoning, load densities, and development patterns to forecast spatially and when load will appear, making it more suitable than trending. ## Answer **TRUE.** Small area load forecasting predicts the location, amount and timing of load growth in small zones (a few hectares to a few km², or a feeder/distribution transformer service area). The **simulation (land-use) method** is better suited for this than trending. **Justification:** - In a small area the load does not grow smoothly. It stays almost zero for years, then grows very fast when the land is developed, and then saturates (S-shaped growth curve). Trending of past load data cannot predict *when* this sudden growth will start. - Many small areas have little or no load history (vacant land, new housing plots), so there is nothing to extrapolate. - The simulation method uses **land-use data** (residential, commercial, industrial, vacant), zoning plans, road and infrastructure development, distance to urban centres and per-hectare load densities of each land-use class. It models how and where land will be developed and converts it into load. - It can therefore forecast load in areas where development has not yet started, and it gives the spatial (map-wise) distribution of load needed to site substations, transformers and feeders. - It also allows "what if" studies (e.g. a new highway or industrial estate). Trending works well for large areas where growth is smooth and history is long; for small areas the simulation method gives more accurate spatial forecasts, though it needs more data and effort. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. For small area load forecasting, the simulation method is more suitable. This is: A. False, because trending is always better B. True, because simulation uses land-use data and works where history is lacking C. False, because simulation cannot give map-wise results D. True, because small areas grow smoothly Answer: B. Small-area load is dormant, then jumps when land is developed, so trending of history cannot predict it; land-use simulation can. (Key point: Verdict) 2. Why does trending of past data fail for small areas? A. Past data are always too detailed B. Growth is S-shaped and trending cannot predict when sudden growth will start, and vacant land has no history C. Small areas have constant load D. Trending needs land-use maps Answer: B. Load stays near zero then grows quickly; there may be no history to extrapolate. (Key point: Why trending fails) 3. What does the simulation method use and give? A. Only GDP and price; gives national total B. Land-use, zoning and load densities; gives spatial load distribution for siting substations and transformers C. Hourly weather data; gives next-day load D. Expert votes only; gives no map Answer: B. It models land development and converts it to load by land-use class, giving where and when load appears. 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