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  1. (Energy Solution Div., SK D&D.)
  2. (Jeju Branch office, KPX.)



VRE(Variable Renewable Energy, PV(Photovoltaic), Wind Power, Curtailment, ESS(Energy Storage System), Energy Mix

1. ์„œ ๋ก 

๊ธฐํ›„๋ณ€ํ™” ๋ฐ ๊ธฐ์ƒ์ด๋ณ€ ๋“ฑ์œผ๋กœ ์ธํ•˜์—ฌ ํ™˜๊ฒฝ์— ๋Œ€ํ•œ ๊ด€์‹ฌ์ด ๋†’์•„์กŒ๊ณ , ์—ฌ๋Ÿฌ ๊ตญ๊ฐ€์—์„œ๋Š” ํŒŒ๋ฆฌํ˜‘์ •, ๋„์ฟ„ ์˜์ •์„œ ๋“ฑ ์˜จ์‹ค๊ฐ€์Šค๋ฅผ ์ค„์ด๊ธฐ ์œ„ํ•œ ๋…ธ๋ ฅ์ด ๋‹ค๋ฐฉ๋ฉด์œผ๋กœ ์ด๋ฃจ์–ด์ง€๊ณ  ์žˆ์œผ๋ฉฐ, ์ด์— ๋”ฐ๋ผ ์žฌ์ƒ์—๋„ˆ์ง€์— ๋Œ€ํ•œ ๊ด€์‹ฌ ๋˜ํ•œ ๊ธ‰๊ฒฉํžˆ ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ๋‹ค.

์šฐ๋ฆฌ๋‚˜๋ผ ์—ญ์‹œ ์žฌ์ƒ์—๋„ˆ์ง€ 3020์ •์ฑ…, ๊ทธ๋ฆฐ ๋‰ด๋”œ์ •์ฑ… ๋“ฑ์˜ ๋‹ค์–‘ํ•œ ์ •์ฑ…๊ณผ ์ œ๋„์  ์ง€์›์„ ํ†ตํ•˜์—ฌ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ๋ณด๊ธ‰์— ํž˜์“ฐ๊ณ  ์žˆ์œผ๋ฉฐ, ์ œ์ฃผ์ง€์—ญ ๋˜ํ•œ 2030๋…„๊นŒ์ง€ ๋„๋‚ด ์ „๋ ฅ์ˆ˜์š”์˜ 100%๋ฅผ ์‹ ์žฌ์ƒ์—๋„ˆ์ง€๋กœ ๊ณต๊ธ‰ํ•˜๋Š” ๊ฒƒ์„ ๋ชฉํ‘œ๋กœ ์žฌ์ƒ์—๋„ˆ์ง€๋ฅผ ๋ณด๊ธ‰ํ•˜๊ธฐ ์œ„ํ•œ ๋…ธ๋ ฅ์„ ํ•˜๊ณ  ์žˆ๋‹ค(1-3).

ํ•˜์ง€๋งŒ ์ œ์ฃผ์ง€์—ญ์˜ ์žฌ์ƒ์—๋„ˆ์ง€ ์„ค๋น„ ์ ์œ ์œจ์ด ์ œ์ฃผ์ง€์—ญ์˜ ์ „๋ ฅ๊ณต๊ธ‰์„ค๋น„์šฉ๋Ÿ‰์˜ ์•ฝ 40% ์ˆ˜์ค€์—์„œ๋„ ์ˆ˜๊ธ‰๋ถˆ๊ท ํ˜•์œผ๋กœ ์ธํ•œ ์ถœ๋ ฅ์ œ์•ฝ ์‚ฌ๋ก€๊ฐ€ ๋‹ค์ˆ˜ ๋ฐœ์ƒํ•˜์—ฌ ์ „๋ ฅ๊ณ„ํ†ต ์šด์˜๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์žฌ์ƒ์—๋„ˆ์ง€๋ฐœ์ „ ์‚ฌ์—…์—๋„ ๋งŽ์€ ์–ด๋ ค์›€์„ ์ฃผ๊ณ  ์žˆ๋‹ค(4).

์œ ๋Ÿฝ, ๋ฏธ๊ตญ ๋“ฑ์—์„œ๋Š” ์ด๋ฏธ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ ์œ ์œจ ์ฆ๊ฐ€์— ๋”ฐ๋ผ ์ „๋ ฅ์ˆ˜๊ธ‰๋ถˆ๊ท ํ˜•, ์†ก์ „ ํ˜ผ์žก ๋“ฑ์— ์˜ํ•œ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋‹ค์ˆ˜ ๋ฐœ์ƒํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์—๋„ˆ์ง€๋ฏน์Šค์™€ ESS ๋“ฑ์œผ๋กœ ์ด๋ฅผ ์™„ํ™”ํ•˜๊ธฐ ์œ„ํ•œ ์—ฐ๊ตฌ๊ฐ€ ์ง€์†์ ์œผ๋กœ ์ด๋ฃจ์–ด์ง€๊ณ  ์žˆ๋‹ค(4-6). ์ œ์ฃผ์ง€์—ญ์—์„œ๋„ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ์ „๋ ฅ๊ณ„ํ†ต์œผ๋กœ์˜ VRE(Variable Renewable Energy) ์ˆ˜์šฉ์ฆ๋Œ€๋ฅผ ์œ„ํ•œ ์žฌ์ƒ์—๋„ˆ์ง€ ๊ธฐ์—ฌ๋„ ๋ถ„์„, ์ถœ๋ ฅ๋Ÿ‰ ๋ฐฐ๋ถ„ ๋ฐฉ์•ˆ, ์—๋„ˆ์ง€๋ฏน์Šค ๋ฐ ESS(Energy Storage System) ์šด์˜ ๋“ฑ ๋‹ค์–‘ํ•œ ์—ฐ๊ตฌ๊ฐ€ ์ง„ํ–‰๋˜๊ณ  ์žˆ๋‹ค(7-9).

ํ•˜์ง€๋งŒ ์ถœ๋ ฅ์ œ์•ฝ์„ ๊ณ ๋ คํ•˜๋Š” ์—๋„ˆ์ง€๋ฏน์Šค์— ๊ด€ํ•œ ์—ฐ๊ตฌ๋Š” ์•„์ง ๋ฏธ๋ฏธํ•˜๋ฉฐ, ๋Œ€๋ถ€๋ถ„์˜ ์—๋„ˆ์ง€์ €์žฅ์žฅ์น˜๊ด€๋ จ ์—ฐ๊ตฌ์—์„œ๋Š” ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ถœ๋ ฅ ๋ณด์ƒ ๋ฐ ์ถœ๋ ฅ ์•ˆ์ •ํ™” ๋“ฑ์˜ ๋‹จ์ฃผ๊ธฐ ์šด์šฉ์—๋งŒ ์ง‘์ค‘๋˜์–ด ์žˆ์–ด, ์žฌ์ƒ์—๋„ˆ์ง€ ์ถœ๋ ฅ์ œ์•ฝ์„ ์™„ํ™”ํ•˜๊ธฐ ์œ„ํ•œ ์žฅ์ฃผ๊ธฐ ์šด์šฉ์„ ํ†ตํ•œ ์ˆ˜์šฉ์„ฑ ์ฆ๋Œ€๋ฐฉ์•ˆ์— ๊ด€ํ•œ ์—ฐ๊ตฌ๊ฐ€ ํ•„์š”ํ•œ ์‹ค์ •์ด๋‹ค.

์ œ์ฃผ์ง€์—ญ์—์„œ ํ’๋ ฅ๋ฐœ์ „ ์ถœ๋ ฅ์ œ์•ฝ์˜ ํšŸ์ˆ˜๊ฐ€ ํ•ด๋งˆ๋‹ค ์ฆ๊ฐ€ํ•˜๋Š” ์ƒํ™ฉ์—์„œ ๊ณ„ํ†ต์šด์˜์ž์™€ ๋ฐœ์ „์‚ฌ์—…์ž์˜ ์–ด๋ ค์›€์„ ํ•ด๊ฒฐํ•˜๊ณ  ์ œ์ฃผ์ง€์—ญ์— ๋” ๋งŽ์€ ์žฌ์ƒ์—๋„ˆ์ง€๋ฅผ ๋ณด๊ธ‰ํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๋‹ค์–‘ํ•œ ๋Œ€์ฑ…์ด ํ•„์š”ํ•˜๋‹ค. ๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์„ ์˜ˆ์ƒํ•˜์˜€๊ณ , ํƒœ์–‘๊ด‘๊ณผ ํ’๋ ฅ์˜ ์—๋„ˆ์ง€๋ฏน์Šค๋ฅผ ํ†ตํ•œ ์ถœ๋ ฅ์ œ์•ฝ ๊ฐ์†Œ ํšจ๊ณผ๋ฅผ ๋ถ„์„ํ•˜์˜€์œผ๋ฉฐ, ์ถœ๋ ฅ์ œ์•ฝ ์ด๋ฒคํŠธ ์ง€์†์‹œ๊ฐ„ ๋ฐ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰ ๋ถ„์„์„ ํ†ตํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ์„ ์ตœ์†Œํ™”ํ•  ์ˆ˜ ์žˆ๋Š” ESS์˜ Power Capacity ๋ฐ Energy Capacity๋ฅผ ์‚ฐ์ •ํ•˜์—ฌ ์ œ์ฃผ์ง€์—ญ ์ „๋ ฅ๊ณ„ํ†ต์˜ VRE ์ฆ๋Œ€ ํšจ๊ณผ๋ฅผ ๊ทœ๋ช…ํ•˜์˜€๋‹ค.

2. ์ œ์ฃผ์ง€์—ญ ์ „๋ ฅ๊ณ„ํ†ต์˜ ์žฌ์ƒ์—๋„ˆ์ง€ ์ˆ˜์šฉ์ฆ๋Œ€ ๋ฐฉ์•ˆ

์ด๋ฒˆ ์žฅ์—์„œ๋Š” ์ œ์ฃผ์ง€์—ญ์—์„œ ๋ฐœ์ƒํ•˜๊ณ  ์žˆ๋Š” ์žฌ์ƒ์—๋„ˆ์ง€ ์ถœ๋ ฅ์ œ์•ฝ ํ˜„ํ™ฉ์— ๋Œ€ํ•˜์—ฌ ์•Œ์•„๋ณด๊ณ , ์ถœ๋ ฅ์ œ์•ฝ ์™„ํ™”๋ฅผ ํ†ตํ•œ ์žฌ์ƒ์—๋„ˆ์ง€ ์ˆ˜์šฉ ์ฆ๋Œ€๋ฐฉ์•ˆ์„ ์ œ์‹œํ•˜๊ณ ์ž ํ•œ๋‹ค.

2.1 ์ œ์ฃผ์ง€์—ญ ์ „๋ ฅ์„ค๋น„ ๋ฐ ์ถœ๋ ฅ์ œ์•ฝ ํ˜„ํ™ฉ

ํ•œ๊ตญ์ „๋ ฅ๊ฑฐ๋ž˜์†Œ ์ „๋ ฅํ†ต๊ณ„์ •๋ณด์‹œ์Šคํ…œ ์ƒ์˜ 2019๋…„๋„ ๊ธฐ์ค€ ์ œ์ฃผ์ง€์—ญ์˜ ์—ฐ๋ฃŒ์›๋ณ„ ์‹œ์žฅ์ฐธ์—ฌ ์„ค๋น„์šฉ๋Ÿ‰์€ ์œ ๋ฅ˜๋ฐœ์ „ 343 MW, LNG ๋ฐœ์ „ 105 MW, PV(Photovoltaic) 261.MW, WP(Wind Power) 295 MW, ๋ฐ”์ด์˜ค 357.1 MW, HVDC 400 MW๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ์œผ๋ฉฐ, 2021๋…„ ๋ง HVDC #3 200 MW๊ฐ€ ์ถ”๊ฐ€์ ์œผ๋กœ ์ฐฉ๊ณต๋  ์˜ˆ์ •์ด๋‹ค(10).

ํ‘œ 1. ์ œ์ฃผ์ง€์—ญ VRE ๋ฐ ์ถœ๋ ฅ์ œ์•ฝ ํ˜„ํ™ฉ

Table 1. Status of the VRE & Curtailment in Jeju

Year

2016

2017

2018

2019

WP (MW)

271.5

273.5

267.1

295

PV (MW)

102.5

120.6

168.3

261

Curtailment

6

14

15

46

์ œ์ฃผ์ง€์—ญ์˜ VRE (Variable Renewable Energy) ์„ค๋น„์šฉ๋Ÿ‰ ๋ฐ ์ถœ๋ ฅ์ œ์•ฝ ํ˜„ํ™ฉ์„ ํ‘œ 1์— ๋‚˜ํƒ€๋‚ด์—ˆ๋‹ค. 2016๋…„๋ถ€ํ„ฐ 2019๋…„๊นŒ์ง€ WP์˜ ์„ค๋น„์šฉ๋Ÿ‰์€ ์•ฝ 20 MW๊ฐ€ ์ฆ๊ฐ€ํ•œ ๋ฐ˜๋ฉด, PV์˜ ์„ค๋น„์šฉ๋Ÿ‰์€ ์•ฝ 160 MW๊ฐ€ ์ฆ๊ฐ€ํ•˜์˜€๊ณ , ์ถœ๋ ฅ์ œํ•œ ๋ฐœ์ƒ ํšŸ์ˆ˜ ์—ญ์‹œ 40ํšŒ ๋” ๋ฐœ์ƒํ•˜์˜€๋‹ค. PV ์„ค๋น„์šฉ๋Ÿ‰์˜ ๊ธ‰๊ฒฉํ•œ ์ฆ๊ฐ€๋กœ ์ธํ•˜์—ฌ ๋‚ฎ ์‹œ๊ฐ„ ๋™์•ˆ์˜ ๋ฐœ์ „๋Ÿ‰์ด ๊ธ‰์ฆํ•˜์˜€๊ณ , ๊ทธ๋กœ ์ธํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ ๋˜ํ•œ ๊ธ‰๊ฒฉํžˆ ์ฆ๊ฐ€ํ•˜์˜€์Œ์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค(8,10). PV ์„ค๋น„์šฉ๋Ÿ‰์˜ ๊ธ‰๊ฒฉํ•œ ์ฆ๊ฐ€๋กœ ์ธํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ์˜ ํšŸ์ˆ˜๊ฐ€ ์•ฝ 8๋ฐฐ ์ฆ๊ฐ€ํ•˜์˜€๊ณ , ๋‚ฎ ์‹œ๊ฐ„์— ์ถœ๋ ฅ์ œ์•ฝ์ด ์ง‘์ค‘๋จ์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค.

์ด๋ฒˆ ์ ˆ์—์„œ๋Š” ํ•œ ๊ฐ€์ง€ ์žฌ์ƒ์—๋„ˆ์ง€์›์œผ๋กœ์˜ ํŽธ์ค‘์„ ๋ง‰๋Š” ์ ์ • ์—๋„ˆ์ง€๋ฏน์Šค ์†”๋ฃจ์…˜๊ณผ ESS (Energy Storage System)์„ ์ด์šฉํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋งŽ์ด ๋ฐœ์ƒํ•˜๋Š” ๋‚ฎ ์‹œ๊ฐ„์˜ ๋ฐœ์ „๋Ÿ‰์„ ์ฒจ๋‘๋ถ€ํ•˜ ์‹œ๊ฐ„๋Œ€๋กœ ์ด๋™์‹œํ‚ด์œผ๋กœ์„œ ์ถœ๋ ฅ์ œ์•ฝ์„ ์™„ํ™”ํ•˜๊ณ  ์ „๋ ฅ๊ณ„ํ†ต์œผ๋กœ์˜ ์žฌ์ƒ์—๋„ˆ์ง€ ์ˆ˜์šฉ์ฆ๋Œ€๋ฅผ ์œ„ํ•œ ๋ฐฉ๋ฒ•์— ๋Œ€ํ•˜์—ฌ ์ œ์‹œํ•œ๋‹ค.

2.2 VRE ์ˆ˜์šฉ์ฆ๋Œ€ ๋ฐฉ์•ˆ

์ œ์ฃผ์ง€์—ญ์˜ ์ „๋ ฅ๊ณ„ํ†ต์œผ๋กœ์˜ VRE ์ˆ˜์šฉ์ฆ๋Œ€๋ฅผ ์œ„ํ•œ ๋ฐฉ์•ˆ์„ ๊ทธ๋ฆผ 1์— ์ œ์‹œํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์ฆ๋Œ€๋ฐฉ์•ˆ์˜ ์ˆœ์„œ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค.

1) ๋ฐ์ดํ„ฐ ๋ถ„์„ โ€“ ์ œ9์ฐจ ์ „๋ ฅ ์ˆ˜๊ธ‰ ๊ณ„ํš์˜ ์ „๋ ฅ์ˆ˜์š” ์ „๋ง ๋ฐ VRE ์„ค์น˜์šฉ๋Ÿ‰ ๋ชฉํ‘œ์น˜๋ฅผ ์ด์šฉํ•˜์—ฌ 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ ์ „๋ ฅ์ˆ˜์š” ๋ฐ VRE ๋ฐœ์ „๋Ÿ‰์„ ์˜ˆ์ƒํ•œ๋‹ค.

2) ์—๋„ˆ์ง€๋ฏน์Šค ์‹œ๋ฎฌ๋ ˆ์ด์…˜ โ€“ must-run ๋ฐœ์ „๊ธฐ ์ตœ์†Œ ์ถœ๋ ฅ, HVDC ์—ญ์†ก ๋“ฑ์„ ๊ณ ๋ คํ•œ VRE ์ถœ๋ ฅ์ œ์•ฝ ์ตœ์†Œํ™” ๋ฐฉ์•ˆ์„ ์„ค๊ณ„ํ•œ๋‹ค. ๊ทธ๋ฆฌ๊ณ  PV์™€ WP์— ์„ค๋น„์šฉ๋Ÿ‰์„ ํ• ๋‹น ๋ฐ ๋ฐ˜๋ณต ๊ณ„์‚ฐ์„ ํ†ตํ•˜์—ฌ ์ตœ์  ์—๋„ˆ์ง€๋ฏน์Šค๋ฅผ ๋„์ถœํ•œ๋‹ค.

3) ESS ์šฉ๋Ÿ‰ ๊ณ„์‚ฐ ๋ฐ ์ถœ๋ ฅ์ œํ•œ ํšจ๊ณผ ๋ถ„์„ - ์ถœ๋ ฅ์ œ์•ฝ ๋ฐœ์ƒํŒจํ„ด์„ ๋ถ„์„ํ•˜๊ณ , ESS์˜ Power Capacity์™€ Energy Capacity๋ฅผ ์‚ฐ์ •ํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ ๊ฐ์†Œ๋ฅผ ํ†ตํ•œ ์ œ์ฃผ์ง€์—ญ VRE ์ˆ˜์šฉ์ฆ๋Œ€ ํšจ๊ณผ์— ๋Œ€ํ•˜์—ฌ ๋ถ„์„ํ•œ๋‹ค.

2.3 ์—๋„ˆ์ง€๋ฏน์Šค ์†”๋ฃจ์…˜

์ œ์ฃผ์ง€์—ญ์—์„œ๋Š” 2018๋…„ ์ดํ›„ PV ๋ฐœ์ „๋Ÿ‰์˜ ๊ธ‰๊ฒฉํ•œ ์ฆ๊ฐ€๋กœ ์ธํ•˜์—ฌ ๋‚ฎ ์‹œ๊ฐ„ ์ถœ๋ ฅ์ œ์•ฝ์ด ๊ธ‰๊ฒฉํžˆ ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ๋‹ค๋Š” ์‚ฌ์‹ค์„ ์•ž์„œ ์–ธ๊ธ‰ํ•˜์˜€์œผ๋ฉฐ, ์ด๋Ÿฌํ•œ ์ž์›์˜ ํŽธ์ค‘์— ์˜ํ•œ ์ถœ๋ ฅ์ œ์•ฝ์„ ์ค„์ด๊ธฐ ์œ„ํ•œ ๋ฐฉ์•ˆ์œผ๋กœ ๊ณ„ํš์ ์ด๊ณ  ์ ์ ˆํ•œ ์—๋„ˆ์ง€๋ฏน์Šค๊ฐ€ ํ•„์š”ํ•˜๋‹ค.

๊ทธ๋ฆผ. 2. VRE ์ˆ˜์šฉ์ฆ๋Œ€ ๋ฐฉ์•ˆ

Fig. 2. Measures to Increase Renewable Energy Accommodation

../../Resources/kiee/KIEE.2021.70.8.1089/fig2.png

์—๋„ˆ์ง€๋ฏน์Šค๋ฅผ ํ†ตํ•œ ์ถœ๋ ฅ์ œ์•ฝ ๊ฐ์†Œ ํšจ๊ณผ๋ฅผ ๋„์ถœํ•˜๊ธฐ ์œ„ํ•˜์—ฌ 4๊ฐœ์˜ ํ™”๋ ฅ๋ฐœ์ „๊ธฐ๋ฅผ must-run ๋ฐœ์ „๊ธฐ๋กœ ์„ค์ •ํ•˜์—ฌ ๋ถ€ํ•˜์— ๋”ฐ๋ผ ์ตœ์†Œ๋ฐœ์ „๋Ÿ‰์„ ์กฐ์ •ํ•˜๊ณ , ์ถœ๋ ฅ์ œ์•ฝ ๋ฐœ์ƒ ์‹œ HVDC(ํ•ด์ €์—ฐ๊ณ„์„ )๋ฅผ ํ†ตํ•˜์—ฌ ์ œ์ฃผ-์œก์ง€ ๊ฐ„ ์—ญ์†ก์„ ์‹ค์‹œํ•œ๋‹ค.

์—๋„ˆ์ง€๋ฏน์Šค๋ฅผ ์œ„ํ•ด์„œ๋Š” ์šฐ์„  2015๋…„๋ถ€ํ„ฐ 2019๋…„๊นŒ์ง€์˜ VRE ์ด์šฉ๋ฅ  ๋ถ„์„ ๋ฐ ์ด๋™ํ‰๊ท ๋ฒ•์„ ์ด์šฉํ•˜์—ฌ 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ PV์™€ WP์˜ ์ด์šฉ๋ฅ ์„ ๊ฐ๊ฐ ์˜ˆ์ƒํ•œ๋‹ค(6).

๋‹ค์Œ์œผ๋กœ ์‹(1)๊ณผ ์‹(2)์—์„œ์™€ ๊ฐ™์ด ์„ค๋น„์šฉ๋Ÿ‰์˜ ๋น„์ค‘์„ ๋ณ€๊ฒฝํ•˜์—ฌ PVt์™€ WPt๋ฅผ ๊ณ„์‚ฐํ•˜๊ณ , ์‹(3)๊ณผ ๊ฐ™์ด ํ•ฉํ•˜์—ฌ ์‹œ๊ฐ„๋ณ„ ์žฌ์ƒ์—๋„ˆ์ง€ ๋ฐœ์ „๋Ÿ‰์ธ VREt๋ฅผ ์‚ฐ์ •ํ•œ ํ›„ ์‹(4)๋ฅผ ์ด์šฉํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰ C๋ฅผ ๊ณ„์‚ฐํ•œ๋‹ค.

(1)
PVt=CFPV.tร—CPVRE.yrร—m(m=0,0.1,0.2,...,1)

(2)
WPt=CFWP.tร—CPVRE.yrร—n(n=1โˆ’m)

(3)
VREt=PVt+WPt

(4)
C=โˆ‘8760t=1Dtโˆ’Pmin.tโˆ’VREt+HVDCR.t

์—ฌ๊ธฐ์„œ, Dt์™€ VREt๋Š” ๋ฐ์ดํ„ฐ ๋ถ„์„์„ ํ†ตํ•˜์—ฌ ์˜ˆ์ƒํ•œ ์‹œ๊ฐ„๋ณ„ ๊ณ„ํ†ต์ˆ˜์š”์™€ ์žฌ์ƒ์—๋„ˆ์ง€ ๋ฐœ์ „๋Ÿ‰์ด๋‹ค. Pmin.t๋Š” ์ œ์ฃผ์ง€์—ญ ๋ฐœ์ „๊ธฐ์˜ ์‹œ๊ฐ„๋ณ„ ์ตœ์†Œ์šด์ „์„ ๋‚˜ํƒ€๋‚ธ๋‹ค. must-run ๋ฐœ์ „๊ธฐ์ธ 4๊ฐœ์˜ ํ™”๋ ฅ๋ฐœ์ „๊ธฐ์™€ HVDC#1์˜ ์ตœ์†Œ๋ฐœ์ „๋Ÿ‰์„ ๊ณ ๋ คํ•˜์—ฌ Pmin.t๋ฅผ 275 MW๋กœ ์„ค์ •ํ•˜๊ณ , HVDCR.t๋Š” HVDC๋ฅผ ํ†ตํ•œ ์ œ์ฃผ-์œก์ง€ ๊ฐ„ ์—ญ์†ก ์šฉ๋Ÿ‰์œผ๋กœ 400 MW๋กœ ์„ค์ •ํ•œ๋‹ค(8,11).

CFPV.t์™€ CFWP.t๋Š” ๊ฐ๊ฐ PV์™€ WP์˜ ์‹œ๊ฐ„๋ณ„ ์ด์šฉ๋ฅ ์ด๊ณ , CPVRE.yr์€ ๋…„๋„๋ณ„ ์žฌ์ƒ์—๋„ˆ์ง€ ์„ค์น˜์šฉ๋Ÿ‰์œผ๋กœ ์ œ9์ฐจ ์ „๋ ฅ ์ˆ˜๊ธ‰ ๊ณ„ํš์˜ ์„ค์น˜์šฉ๋Ÿ‰ ๋ชฉํ‘œ์น˜๋ฅผ ๋ฐ˜์˜ํ•œ๋‹ค. m๊ณผ n์€ ์—๋„ˆ์ง€๋ฏน์Šค๋ฅผ ์œ„ํ•œ ํ• ๋‹น๋Ÿ‰์œผ๋กœ 0%~ 100%๋กœ ์„ค์ •ํ•œ๋‹ค.

2.4 ์—๋„ˆ์ง€์ €์žฅ์žฅ์น˜๋ฅผ ํ™œ์šฉํ•œ VRE ์ˆ˜์šฉ์ฆ๋Œ€ ๋ฐฉ์•ˆ

์—๋„ˆ์ง€์ €์žฅ์žฅ์น˜์˜ ํฌ๊ธฐ๋Š” Power Capacity์™€ Energy Capacity๋กœ ์ •์˜๋œ๋‹ค. Power Capacity๋Š” ์ถฉ/๋ฐฉ์ „์„ ํ•  ์ˆ˜ ์žˆ๋Š” ๋น„์œจ์„ ๋ฐ˜์˜ํ•˜๋ฉฐ, Energy Capacity๋Š” ์ €์žฅ๋œ ์—๋„ˆ์ง€์˜ ์–‘์„ ์˜๋ฏธํ•œ๋‹ค. ํ˜„์žฌ ESS๋Š” ๋‹ค์–‘ํ•œ ์šฉ๋„๋กœ ์‚ฌ์šฉ๋˜๊ณ  ์žˆ์œผ๋ฉฐ, ์‚ฌ์šฉ ์šฉ๋„์— ๋”ฐ๋ผ ์ˆ˜์ดˆ์—์„œ ์ˆ˜๋ถ„์œผ๋กœ ์šด์šฉ๋˜๋Š” ๋‹จ์ฃผ๊ธฐ์šฉ ESS ๊ธธ๊ฒŒ๋Š” ๋ช‡ ์‹œ๊ฐ„ ๋™์•ˆ์˜ ์šด์˜์ด ๊ฐ€๋Šฅํ•œ ์žฅ์ฃผ๊ธฐ์šฉ ESS๋กœ ๋ถ„๋ฅ˜๋œ๋‹ค(5). ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ถœ๋ ฅ์ œ์•ฝ์„ ์™„ํ™” ์‹œํ‚ค๊ธฐ ์œ„ํ•˜์—ฌ ESS์˜ ์šฉ๋Ÿ‰์„ ๋ฌด์ œํ•œ ๋Š˜๋ฆฐ๋‹ค๋ฉด ์ถœ๋ ฅ์ œ์•ฝ ๊ตฌ๊ฐ„์ด ๋ฐฉ์ „์‹œ๊ฐ„๋Œ€๋กœ ์ด๋™ํ•˜๋ฉฐ ๋ฆฌ๋ฐ”์šด๋“œ ํšจ๊ณผ๋กœ ์ธํ•˜์—ฌ ๋‹ค์‹œ๊ธˆ ๋” ํฐ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๋Š” ํ˜„์ƒ์ด ๋‚˜ํƒ€๋‚œ๋‹ค. ๋”ฐ๋ผ์„œ ์—๋„ˆ์ง€์ €์žฅ์žฅ์น˜๋ฅผ ํ™œ์šฉํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ์„ ์ค„์ด๊ธฐ ์œ„ํ•ด์„œ๋Š” ์ถœ๋ ฅ์ œ์•ฝ ์‹œ๊ฐ„ ๋ฐ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์˜ ๋ถ„์„์„ ํ†ตํ•˜์—ฌ ์ ์ ˆํ•œ ์—๋„ˆ์ง€์ €์žฅ์žฅ์น˜์˜ ์šฉ๋Ÿ‰์„ ์ฐพ๊ณ  ์šด์˜ํ•˜๋Š” ๊ฒƒ์ด ์ค‘์š”ํ•˜๋‹ค(8).

๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ์žฅ์‹œ๊ฐ„ ๋™์•ˆ ๋ฐœ์ƒํ•˜๋Š” ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ถœ๋ ฅ์ œ์•ฝ์— ๋Œ€ํ•œ ์™„ํ™”๋ฅผ ์œ„ํ•˜์—ฌ ์žฅ์ฃผ๊ธฐ ESS ์šด์šฉ์„ ์„ ํƒํ•œ๋‹ค. ๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ํ˜„์žฌ ์žฅ์ฃผ๊ธฐ ์šด์šฉ์— ์‚ฌ์šฉ ๋ฐ ๊ฐœ๋ฐœ๋˜๊ณ  ์žˆ๋Š” ๋ฆฌํŠฌโ€“์ด์˜จ, ํ”Œ๋กœ์šฐ ์ „์ง€, ์–‘์ˆ˜๋ฐœ์ „ ๋“ฑ์„ ๊ณ ๋ คํ•˜์—ฌ ์šด์šฉ ์ฃผ๊ธฐ๋ฅผ 4์‹œ๊ฐ„, 8์‹œ๊ฐ„, 12์‹œ๊ฐ„์œผ๋กœ ์„ค์ •ํ•˜๊ณ  ๊ฐ๊ฐ์˜ ์‹œ๊ฐ„ ์ฃผ๊ธฐ์— ๋Œ€ํ•˜์—ฌ Power Capacity๋ฅผ ๋ณ€๊ฒฝํ•ด๊ฐ€๋ฉด์„œ ์ตœ๋Œ€์˜ ์ถœ๋ ฅ์ œ์•ฝ ์™„ํ™”๋ฅผ ๋ณด์ด๋Š” ์ตœ์ ์˜ ESS Energy Capacity๋ฅผ ๋„์ถœํ•˜๊ณ , ์™„ํ™” ํšจ๊ณผ๋ฅผ ๋ถ„์„ํ•œ๋‹ค(5,8).

1) ์—๋„ˆ์ง€๋ฏน์Šค ์ถœ๋ ฅ์ œ์•ฝ Event ๋ถ„์„

2) ESS ์ถฉ/๋ฐฉ์ „์„ ์œ„ํ•œ Time Scale Setting(4/8/12์‹œ๊ฐ„)

3) Power Capacity 10 MW~300 MW๊นŒ์ง€ ์ˆœ์ฐจ์ ์œผ๋กœ ๋ณ€๊ฒฝํ•˜์—ฌ ๊ณ„์‚ฐ ๋ฐ˜๋ณต

4) ์ถœ๋ ฅ์ œ์•ฝ์ด ์ตœ์†Œ๋กœ ๋‚˜ํƒ€๋‚˜๋Š” ์‹œ๊ฐ„ ์ฃผ๊ธฐ ๋ฐ Power Capacity๋ฅผ ๋„์ถœํ•˜๊ณ  ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰ ์™„ํ™” ํšจ๊ณผ ํ™•์ธ

2.5 ์œ ์œจ๊ณผ ์ถœ๋ ฅ์ œ์•ฝ ๋น„์œจ์„ ํ†ตํ•œ ์ˆ˜์šฉ์ฆ๋Œ€ ํšจ๊ณผ ๋ถ„์„

์ตœ์ข…์ ์œผ๋กœ ์—๋„ˆ์ง€๋ฏน์Šค์™€ ESS๋ฅผ ํ™œ์šฉํ•œ VRE ์ˆ˜์šฉ์ฆ๋Œ€ ๋ฐฉ์•ˆ์— ๋Œ€ํ•œ ํšจ๊ณผ ๋ถ„์„์€ VRE์˜ ์—๋„ˆ์ง€ ์ ์œ ์œจ(P)๊ณผ ์ถœ๋ ฅ์ œ์•ฝ ๋น„์œจ(C)์„ ์ด์šฉํ•˜์—ฌ ์œ„์— ์ œ์‹œํ•œ ๋ฐฉ๋ฒ•๋“ค์— ๋Œ€ํ•œ ์ˆ˜์šฉ์ฆ๋Œ€ ํšจ๊ณผ๋ฅผ ๋ถ„์„ํ•œ๋‹ค.

์ถœ๋ ฅ์ œ์•ฝ์˜ ์™„ํ™” ํ†ตํ•œ VRE์˜ ์ ์œ ์œจ๊ณผ VRE์˜ ๋ฐœ์ „๋Ÿ‰์— ๋Œ€ํ•œ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰ ๋น„์œจ์˜ ๋น„๊ต๋ฅผ ํ†ตํ•˜์—ฌ ์žฌ์ƒ์—๋„ˆ์ง€ ์šด์˜ ์ƒํƒœ๋ฅผ ํŒ๋‹จํ•œ๋‹ค(5).

3. ์žฌ์ƒ์—๋„ˆ์ง€ ์ถœ๋ ฅ์ œ์•ฝ ์™„ํ™”์— ์˜ํ•œ ์ˆ˜์šฉ ์ฆ๋Œ€ ๋ถ„์„

3.1 VRE ์—๋„ˆ์ง€๋ฏน์Šค ํšจ๊ณผ ๋ถ„์„

์žฌ์ƒ์—๋„ˆ์ง€์˜ ์—๋„ˆ์ง€๋ฏน์Šค ๋น„์œจ์— ๋”ฐ๋ฅธ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์„ ๊ทธ๋ฆผ 3์— ๋‚˜ํƒ€๋‚ธ๋‹ค. 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ ์ „๋ ฅ์ˆ˜์š”์™€ VRE ๋ฐœ์ „๋Ÿ‰์„ ์˜ˆ์ƒํ•˜๊ธฐ ์œ„ํ•˜์—ฌ 2015๋…„๋ถ€ํ„ฐ 2019๋…„๊นŒ์ง€์˜ ์ œ์ฃผ์ง€์—ญ ์ „๋ ฅ์ˆ˜์š”์™€ ์žฌ์ƒ์—๋„ˆ์ง€ ์ด์šฉ๋ฅ ์„ ๋ถ„์„ํ•œ๋‹ค. ์ œ9์ฐจ ์ „๋ ฅ์ˆ˜๊ธ‰๊ณ„ํš์˜ VRE ์„ค์น˜ ๋ชฉํ‘œ์น˜๋ฅผ ๋Œ€์ž…ํ•˜์—ฌ VRE ์„ค์น˜ ๋น„์œจ์— ๋”ฐ๋ฅธ ๋ฐœ์ „๋Ÿ‰์„ ๊ตฌํ•˜๊ณ , ์‹(4)๋ฅผ ์ด์šฉํ•˜์—ฌ VRE์˜ ์—๋„ˆ์ง€๋ฏน์Šค ๋น„์œจ์— ๋”ฐ๋ผ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์„ ๊ตฌํ•œ๋‹ค.

๊ทธ๋ฆผ 3๊ณผ ๊ฐ™์ด PV์™€ WP์˜ ์—๋„ˆ์ง€๋ฏน์Šค ๋น„์œจ์ด 40:60์ผ ๋•Œ ๊ฐ€์žฅ ๋‚ฎ์€ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์ด ๋‚˜ํƒ€๋‚œ๋‹ค. 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€ VRE์˜ ์„ค์น˜์šฉ๋Ÿ‰์ด ๊ท ๋“ฑํ•œ ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค(Equal Energy Mix)์˜ ๊ฒฝ์šฐ ๋ฐœ์ƒํ•˜๋Š” ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์ด ๊ฐ๊ฐ 62 GWh, 107 GWh, 205 GWh์˜€๊ณ , ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค(Min.Curtailment Energy Mix)์˜ ๊ฒฝ์šฐ ๊ฐ๊ฐ 49 GWh, 89 GWh, 175 GWh์˜ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•œ๋‹ค.

๊ทธ๋ฆผ. 3. ์—๋„ˆ์ง€๋ฏน์Šค ์†”๋ฃจ์…˜ ๋ถ„์„ ๊ทธ๋ž˜ํ”„

Fig. 3. Analysis Graph of Energy Mix Solution

../../Resources/kiee/KIEE.2021.70.8.1089/fig3.png

3.2 ์ถœ๋ ฅ์ œ์•ฝ ํŒจํ„ด ๋ถ„์„

2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ ํ‰๊ท ์ ์ธ ์ผ์ผ ์ˆœ๋ถ€ํ•˜ ํŒจํ„ด์„ ๋ถ„์„ํ•ด๋ณด๋ฉด 2023๋…„๋ณด๋‹ค 2025๋…„์— ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ ์œ ์œจ์ด ๋†’์•„์ ธ์„œ ๊ทธ๋ฆผ 4์™€ ๊ฐ™์ด ๋• ์ปค๋ธŒ๊ฐ€ ๋”์šฑ ์‹ฌํ•ด์ง€๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚œ๋‹ค. PV์˜ ๋ฐœ์ „๋Ÿ‰์ด ๋งŽ์€ 10์‹œ๋ถ€ํ„ฐ 17์‹œ๊นŒ์ง€์˜ ์ˆœ๋ถ€ํ•˜๊ฐ€ ๋‚ฎ๊ฒŒ ๋‚˜ํƒ€๋‚˜๊ณ , ์ˆ˜์š”๊ฐ€ ๋†’์€ 18์‹œ๋ถ€ํ„ฐ 24์‹œ๊นŒ์ง€์˜ ์ˆœ๋ถ€ํ•˜๊ฐ€ ๋†’๊ฒŒ ๋‚˜ํƒ€๋‚˜๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๋‹ค.

์ผ์ผ ์ˆœ๋ถ€ํ•˜ ํŒจํ„ด์„ ์ด์šฉํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ ์™„ํ™”๋ฅผ ์œ„ํ•œ ESS์˜ ์ถฉ/๋ฐฉ์ „ ์šด์šฉ์„ ํ•œ๋‹ค๋ฉด, ๋‚ฎ ์‹œ๊ฐ„๋Œ€ ์ถฉ์ „, ๊ทธ๋ฆฌ๊ณ  ์ €๋… ์‹œ๊ฐ„๋Œ€์˜ ๋ฐฉ์ „์„ ๊ณ ๋ คํ•  ์ˆ˜ ์žˆ๋‹ค.

์ˆœ๋ถ€ํ•˜ ์ง€์†๊ธฐ๊ฐ„ ๊ณก์„ ์„ ๋ถ„์„ํ•˜์—ฌ ๋ณด๋ฉด ๊ทธ๋ฆผ 5์™€ ๊ฐ™์ด 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€ 1๋…„ ์ค‘ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๋Š” ์‹œ๊ฐ„์€ ์•ฝ 2023๋…„ ์•ฝ 486์‹œ๊ฐ„(6%), 2024๋…„ ์•ฝ 680์‹œ๊ฐ„(8%), ๊ทธ๋ฆฌ๊ณ  2025๋…„์—๋Š” ์•ฝ 1,079์‹œ๊ฐ„(12%)์œผ๋กœ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚œ๋‹ค. 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์€ ์ง€์†์ ์œผ๋กœ ์ฆ๊ฐ€ํ•˜๋ฉฐ, ์ตœ๋Œ€ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์€ 2023๋…„ 536 MW์—์„œ 2025๋…„ 824 MW๊นŒ์ง€ ์ฆ๊ฐ€ํ•œ๋‹ค.

๊ทธ๋ฆผ. 4. ์ผ์ผ ์ˆœ๋ถ€ํ•˜ ํŒจํ„ด

Fig. 4. Daily Net Load Pattern

../../Resources/kiee/KIEE.2021.70.8.1089/fig4.png

๊ทธ๋ฆผ. 5. ์ˆœ๋ถ€ํ•˜ ์ง€์†๊ธฐ๊ฐ„ ๊ณก์„ 

Fig. 5. Duration Curve of Net Load

../../Resources/kiee/KIEE.2021.70.8.1089/fig5.png

๊ทธ๋ฆผ. 6. ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰๋ณ„ ๋นˆ๋„์ˆ˜

Fig. 6. Frequency of Amount of Curtailment Event

../../Resources/kiee/KIEE.2021.70.8.1089/fig6.png

๊ทธ๋ฆผ. 7. ์ถœ๋ ฅ์ œ์•ฝ ๋ฐœ์ƒ ์ง€์†์‹œ๊ฐ„ ๋นˆ๋„์ˆ˜

Fig. 7. Frequency of Duration of Curtailment

../../Resources/kiee/KIEE.2021.70.8.1089/fig7.png

2025๋…„์˜ ์˜ˆ์ƒ๋˜๋Š” ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰๊ณผ ์‹œ๊ฐ„์˜ ๊ธธ์ด์— ๋Œ€ํ•œ ๋นˆ๋„์ˆ˜๋ฅผ ๊ทธ๋ฆผ 6๊ณผ ๊ทธ๋ฆผ 7์— ๊ฐ๊ฐ ๋‚˜ํƒ€๋‚ด๊ณ  ์žˆ๋‹ค.

2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰๋ณ„ ๋นˆ๋„์ˆ˜๋ฅผ ์‚ดํŽด๋ณด๋ฉด ๊ทธ๋ฆผ 6์—์„œ์™€ ๊ฐ™์ด 0~50 MWh ๊ตฌ๊ฐ„์ด ๊ฐ€์žฅ ๋งŽ์€ ๋นˆ๋„์ˆ˜๋ฅผ ์ฐจ์ง€ํ•˜๋ฉฐ, 400 MWh ์ด์ƒ์˜ ์ถœ๋ ฅ์ œ์•ฝ๋„ 60ํšŒ ์ด์ƒ ๋ฐœํ–‰ํ•œ๋‹ค. 0~100 MWh ๊นŒ์ง€๋Š” ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค(Min Curtailment Energy Mix)์—์„œ ๋” ๋งŽ์€ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๋‚˜, 100MWh ์ด์ƒ์˜ ๊ตฌ๊ฐ„์—์„œ๋Š” ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค(Equal Energy Mix)์—์„œ ๋” ๋งŽ์€ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚œ๋‹ค.

์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๋Š” ์‹œ๊ฐ„์˜ ๊ธธ์ด(์ถœ๋ ฅ์ œ์•ฝ ์ง€์†๊ธฐ๊ฐ„)๋ฅผ ๋ถ„์„ํ•˜์—ฌ ๋ณด๋ฉด ๊ทธ๋ฆผ 7๊ณผ ๊ฐ™์ด ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค์™€ ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค์—์„œ ๋ชจ๋‘ 1์‹œ๊ฐ„์—์„œ 10์‹œ๊ฐ„ ์ด์ƒ๊นŒ์ง€ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, 5์‹œ๊ฐ„์—์„œ์˜ ๋นˆ๋„์ˆ˜๊ฐ€ ๊ฐ€์žฅ ํฌ๊ฒŒ ๋‚˜ํƒ€๋‚œ๋‹ค. ๋‘ ์—๋„ˆ์ง€๋ฏน์Šค ์†”๋ฃจ์…˜ ๋ชจ๋‘์—์„œ ์ถœ๋ ฅ์ œํ•œ ์‹œ๊ฐ„์˜ ๊ธธ์ด๋Š” 4์‹œ๊ฐ„~6์‹œ๊ฐ„ ์‚ฌ์ด์—์„œ ๊ฐ€์žฅ ๋งŽ์ด ๋‚˜ํƒ€๋‚˜๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๋‹ค. ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค์™€ ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค์—์„œ ๋ชจ๋‘ PV์˜ ์˜ํ–ฅ์œผ๋กœ ๋‚ฎ ์‹œ๊ฐ„๋Œ€ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋งŽ์•„ 4์‹œ๊ฐ„~6์‹œ๊ฐ„ ์‚ฌ์ด์˜ ๊ตฌ๊ฐ„์—์„œ ๋นˆ๋„์ˆ˜๊ฐ€ ๊ฐ€์žฅ ๋งŽ์ด ๋‚˜ํƒ€๋‚˜๊ณ  ์žˆ์œผ๋ฉฐ, WP์˜ ์ ์œ ์œจ์ด ๋งŽ์€ ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค์—์„œ 10์‹œ๊ฐ„ ์ด์ƒ์˜ ์ง€์†์‹œ๊ฐ„์„ ๊ฐ–๋Š” ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๊ณ  ์žˆ๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚œ๋‹ค.

๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ํ˜„์žฌ ์ƒ์šฉํ™”๋˜๊ณ  ์žˆ๊ฑฐ๋‚˜ ํ˜น์€ ๊ฐœ๋ฐœ ์ค‘์ธ ESS์˜ ์šฉ๋Ÿ‰์„ ๊ณ ๋ คํ•˜์—ฌ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ˆ˜์šฉ์„ฑ ์ฆ๋Œ€ ํšจ๊ณผ๋ฅผ ๋ถ„์„ํ•˜์˜€์œผ๋‚˜, ์ด๋Ÿฌํ•œ ์ถœ๋ ฅ์ œ์•ฝ ๋นˆ๋„์ˆ˜ ๋ฐ ์ถœ๋ ฅ์ œ์•ฝ ๋ฐœ์ƒ ์ง€์†์‹œ๊ฐ„ ๋นˆ๋„์ˆ˜๋ฅผ ์ด์šฉํ•˜์—ฌ ESS์˜ Energy Capacity์™€ Power Capacity๋ฅผ ๊ฒฐ์ •ํ•˜๋Š” ๊ฒฝ์ œ์ ์ธ ESS ์šฉ๋Ÿ‰์˜ ์„ค์ •์ด ๊ฐ€๋Šฅํ•  ๊ฒƒ์ด๋‹ค.

3.3 SS๋ฅผ ํ™œ์šฉํ•œ VRE ์ˆ˜์šฉ์ฆ๋Œ€ ํšจ๊ณผ ๋ถ„์„

์—๋„ˆ์ง€๋ฏน์Šค์™€ ํ™œ์šฉํ•œ VRE์˜ ์ˆ˜์šฉ์„ฑ ์ฆ๋Œ€ ํšจ๊ณผ๋Š” ๊ทธ๋ฆผ 8๊ณผ ๊ฐ™์ด ๋‚˜ํƒ€๋‚œ๋‹ค. ์—๋„ˆ์ง€๋ฏน์Šค์™€ ESS๋ฅผ ๊ฐ™์ด ํ™œ์šฉํ•  ๊ฒฝ์šฐ์˜ ํšจ๊ณผ๋ฅผ ๋น„๊ตํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค(Equal Energy Mix)์™€ ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค(Min Curtailment Energy Mix)์—์„œ ESS์˜ ์ถฉ/๋ฐฉ์ „์„ 4์‹œ๊ฐ„, 8์‹œ๊ฐ„ ๊ทธ๋ฆฌ๊ณ  12์‹œ๊ฐ„ ์ฃผ๊ธฐ๋กœ ์šด์šฉํ•˜์˜€์„ ๋•Œ์˜ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์„ ๊ตฌํ•˜๋ฉด ๊ทธ๋ฆผ 8๊ณผ ๊ฐ™์ด ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ์€ ESS ์ถฉ/๋ฐฉ์ „์‹œ๊ฐ„์ด 8์‹œ๊ฐ„, Power Capacity 110 MW์—์„œ ์ตœ์†Œ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋‚˜ํƒ€๋‚œ๋‹ค. ๋ชจ๋“  ๊ณก์„ ์—์„œ ์ผ์ • ์šฉ๋Ÿ‰ ์ด์ƒ์˜ ์šฉ๋Ÿ‰์—์„œ ๋‹ค์‹œ ๊ทธ๋ž˜ํ”„๊ฐ€ ์ƒ์Šนํ•˜๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๋Š”๋ฐ, ์ด๋Š” ๋ฐฉ์ „ ๊ตฌ๊ฐ„์—์„œ ๋‹ค์‹œ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜๋Š” ๋ฆฌ๋ฐ”์šด๋“œ ํšจ๊ณผ๋กœ ์ธํ•˜์—ฌ ESS์˜ ์šฉ๋Ÿ‰ ์ฆ๊ฐ€์—๋„ ๋ถˆ๊ตฌํ•˜๊ณ  ์ถœ๋ ฅ์ œ์•ฝ์ด ๋‹ค์‹œ ์ฆ๊ฐ€ํ•˜๋Š” ๊ฒƒ์ด๋‹ค.

์ด๋ฅผ ๋ณด๋”๋ผ๋„ ์ถœ๋ ฅ์ œ์•ฝ ์™„ํ™”๋ฅผ ์œ„ํ•ด ๋ฌดํ•œ๋Œ€๋กœ ESS์˜ ์šฉ๋Ÿ‰์„ ๋Š˜๋ฆฌ๊ธฐ๋ณด๋‹ค๋Š” ๊ฒฝ์ œ์„ฑ ํ™•๋ณด ๋ฐ ์ถœ๋ ฅ์ œ์•ฝ์˜ ์™„ํ™”๋ฅผ ๊ทน๋Œ€ํ™”๋ฅผ ์œ„ํ•œ ESS์˜ ์ ์ • ์šฉ๋Ÿ‰์˜ ์‚ฐ์ •์ด ํ•„์š”ํ•˜๋‹ค.

๋™์ผ ESS ์šด์šฉ ์กฐ๊ฑด์—์„œ ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค(Equal Energy Mix)์™€ ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค(Min Curtailment Energy Mix)์—์„œ์˜ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰ ๋น„๊ตํ•œ ๊ฒฐ๊ณผ๋ฅผ ํ‘œ 2์— ๋‚˜ํƒ€๋‚ด๊ณ  ์žˆ๋‹ค.

์—๋„ˆ์ง€๋ฏน์Šค ํšจ๊ณผ๋ฅผ ๋น„๊ตํ•˜๊ธฐ ์œ„ํ•ด ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค์™€ ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค๋กœ ๊ตฌ๋ถ„ํ•˜๊ณ , ESS ์ถฉ/๋ฐฉ์ „์‹œ๊ฐ„์„ 4์‹œ๊ฐ„, 8์‹œ๊ฐ„, 12์‹œ๊ฐ„์œผ๋กœ ์„ค์ •ํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰ ์™„ํ™” ํšจ๊ณผ๋ฅผ ๋น„๊ตํ•œ๋‹ค. ESS Power Capacity๋Š” ๊ฐ๊ฐ์˜ ์šด์šฉ ์‹œ๊ฐ„์—์„œ ๊ฐ€์žฅ ์ž‘์€ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์„ ๊ฐ–๋Š” Power capacity๋ฅผ ๋‚˜ํƒ€๋‚ด๋ฉฐ, Curtailment Energy๋Š” ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์„ ๋‚˜ํƒ€๋‚ธ๋‹ค.

ํ‘œ 2. ์—๋„ˆ์ง€๋ฏน์Šค ๋ฐ ์—๋„ˆ์ง€์ €์žฅ์žฅ์น˜์˜ ์šฉ๋Ÿ‰์— ๋”ฐ๋ฅธ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰

Table 2. Curtailments according to energy mix and capacity of energy storage system

Energy Mix

Year

2023

2024

2025

Time Scale

4h

8h

12h

4h

8h

12h

4h

8h

12h

Equal Energy Mix

ESS Power Capacity (MW)

100

90

60

120

110

80

150

140

100

Curtailed Energy

(GWh)

46.5

38.9

46.1

80.3

65.6

76.5

156.4

128.0

149.4

Min Curtailment Energy Mix

ESS Power Capacity (MW)

70

60

40

90

80

60

120

110

80

Curtailed Energy (GWh)

41.3

35.9

39.6

72.7

62.7

71.1

144.1

126.6

139.8

๊ทธ๋ฆผ. 8. ์ตœ์†Œ ์ถœ๋ ฅ์ œ์•ฝ์„ ์œ„ํ•œ ESS ์šฉ๋Ÿ‰ ์‚ฐ์ •

Fig. 8. ESS Capacity Estimation for Minimum Output Constraints

../../Resources/kiee/KIEE.2021.70.8.1089/fig8.png

ํ‘œ์—์„œ์™€ ๊ฐ™์ด ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค์—์„œ 2023๋…„ ESS Power Capacity 100 MW๋ฅผ 4์‹œ๊ฐ„ ์šด์šฉ์„ ํ•œ๋‹ค๋ฉด, ์ฆ‰, 400 MWh์˜ ESS Energy Capacity๋ฅผ ์‚ฌ์šฉํ•  ๊ฒฝ์šฐ, 46 GWh์˜ ์ถœ๋ ฅ์ œ์•ฝ์ด ๋ฐœ์ƒํ•˜์˜€๊ณ , 90 MW๋ฅผ 8์‹œ๊ฐ„ ์šด์šฉํ•˜๋Š” ๊ฒฝ์šฐ์˜ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์€ ์•ฝ 38.9 GWh๋กœ 4์‹œ๊ฐ„ ์šด์šฉ ์‹œ ๋ณด๋‹ค ์•ฝ 7.6 GWh์˜ ์ถœ๋ ฅ์ œ์•ฝ ๊ฐ์†Œ๊ฐ€ ๋‚˜ํƒ€๋‚œ๋‹ค.

2023๋…„๋„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€ ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค์™€ 8์‹œ๊ฐ„ ESS ์šด์˜์—์„œ ์ถœ๋ ฅ์ œ์•ฝ์ด ๊ฐ€์žฅ ๋‚ฎ๊ฒŒ ๋‚˜ํƒ€๋‚˜๊ณ  ์žˆ๋‹ค. ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค์™€ ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค์—์„œ ๊ฐ๊ฐ 8์‹œ๊ฐ„ ESS ์šด์šฉ์„ ํ•  ๊ฒฝ์šฐ 3 GWh ~1.4 GWh์˜ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰ ์ฐจ์ด๊ฐ€ ๋‚˜ํƒ€๋‚œ๋‹ค. ๊ทธ๋ฆฌ๊ณ  ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ์„ ์œ„ํ•ด์„œ ๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค์˜ ๊ฒฝ์šฐ๊ฐ€ ์ตœ์†Œ์ถœ๋ ฅ ์—๋„ˆ์ง€๋ฏน์Šค์˜ ๊ฒฝ์šฐ๋ณด๋‹ค 8์‹œ๊ฐ„ ์šด์šฉ๊ธฐ์ค€ 20 MW ~30 MW์˜ ESS Power Capacity๋ฅผ ๋” ์ถ”๊ฐ€ ํ•˜์—ฌ์•ผ ํ•œ๋‹ค.

ํ‘œ 3. ์žฌ์ƒ์—๋„ˆ์ง€ ์ถœ๋ ฅ์ œ์•ฝ ์™„ํ™” ๋ฐฉ์•ˆ์— ๋Œ€ํ•œ C-P Ratio

Table 3. C-P Ratio on the method of mitigate VREใ€€curtailment

Year

2023

2024

2025

Ratio (%)

Penetration

Curtailment

Penetration

Curtailment

Penetration

Curtailment

Equal Energy Mix

56.47

1.69

59.97

2.65

66.12

4.46

Min. Curtail Energy Mix

59.50

1.26

63.17

2.09

69.62

3.61

ESS Operation

59.50

0.92

63.17

1.46

69.62

3

3.4 VRE์˜ ์ ์œ ์œจ๊ณผ ์ถœ๋ ฅ์ œ์•ฝ ๋น„์œจ์˜ ๋น„๊ต๋ฅผ ํ†ตํ•œ VRE ์ˆ˜์š”์ฆ๋Œ€ ํšจ๊ณผ ๋ถ„์„

์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ ์œ ์œจ์— ๋Œ€ํ•œ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ถœ๋ ฅ์ œ์•ฝ ๋น„์œจ์„ ๊ทธ๋ฆผ 9์— ๋‚˜ํƒ€๋‚ด๊ณ  ์žˆ๋‹ค. ์žฌ์ƒ์—๋„ˆ์ง€ ๋ฐœ์ „๋Ÿ‰ ์ ์œ ์œจ์ด ๋†’์•„์งˆ์ˆ˜๋ก ๊ทธ๋ž˜ํ”„๋Š” ์šฐ์ธก์œผ๋กœ ์ด๋™ํ•˜๊ณ , ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์ด ๊ฐ์†Œํ• ์ˆ˜๋ก ๊ทธ๋ž˜ํ”„๋Š” ์•„๋ž˜์ชฝ์œผ๋กœ ์ด๋™ํ•œ๋‹ค.

๊ท ๋“ฑ์—๋„ˆ์ง€๋ฏน์Šค ๋งŒ์„ ์ˆ˜ํ–‰ํ•˜์˜€์„ ๊ฒฝ์šฐ๋ณด๋‹ค ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค์™€ ESS ์šด์šฉ์„ ๋ณ‘ํ–‰ํ•˜์˜€์„ ๊ฒฝ์šฐ์˜ ๊ทธ๋ž˜ํ”„๊ฐ€ ์šฐํ•˜ํ–ฅํ•˜๊ณ  ์žˆ์–ด ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ˆ˜์šฉ์ฆ๋Œ€ ํšจ๊ณผ๋ฅผ ์•Œ ์ˆ˜ ์žˆ๋‹ค. ํ‘œ 3์—์„œ์™€๊ฐ™์ด PV์™€ WP์˜ ์„ค์น˜ ๋น„์œจ์„ ๊ท ๋“ฑํ•˜๊ฒŒ ๊ฐ€์ ธ๊ฐ„๋‹ค๋ฉด, ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ ์œ ์œจ(P)์— ๋Œ€ํ•œ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰(C)์˜ ๋น„์œจ์€ 2023๋…„ 1.69%, 2024๋…„ 2.65%, 2025๋…„ 4.46%๋กœ ๋‚˜ํƒ€๋‚˜๋ฉฐ, ์ตœ์†Œ์ถœ๋ ฅ์ œ์•ฝ ์—๋„ˆ์ง€๋ฏน์Šค ๋ฐฉ์•ˆ์„ ํ†ตํ•˜์—ฌ ๊ฐ๊ฐ 1.26%, 2.09%, 3.61%๋กœ ๊ฐ์†Œํ•˜์˜€๊ณ , ESS(8์‹œ๊ฐ„, 110 MW) ํ™œ์šฉ ์‹œ ๊ฐ๊ฐ 0.92%, 1.46%, 3%๊นŒ์ง€ ๊ฐ์†Œํ•œ๋‹ค.

๊ทธ๋ฆผ. 9. ์ ์œ ์œจ๊ณผ ์ถœ๋ ฅ์ œ์•ฝ ๋น„์œจ์„ ์ด์šฉํ•œ ์žฌ์ƒ์—๋„ˆ์ง€ ์ˆ˜์šฉ์ฆ๋Œ€ ํšจ๊ณผ ๋ถ„์„

Fig. 9. Analysis of the effect of Increasing the Renewable Energy Accommodation

../../Resources/kiee/KIEE.2021.70.8.1089/fig9.png

4. ๊ฒฐ ๋ก 

๊ธ€๋กœ๋ฒŒ ๊ธฐํ›„๋ณ€ํ™”์— ๋Œ€ํ•œ ๋Œ€์‘์œผ๋กœ ์žฌ์ƒ์—๋„ˆ์ง€๋กœ์˜ ์—๋„ˆ์ง€์ „ํ™˜์€ ๋ฐ”๋žŒ์งํ•œ ๋ณ€ํ™”์ด์ง€๋งŒ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ๊ฐ„ํ—์ ์ธ ํŠน์„ฑ์œผ๋กœ ์ธํ•˜์—ฌ ์ „๋ ฅ๊ณ„ํ†ต์˜ ์šด์˜์—๋Š” ๋งŽ์€ ์–ด๋ ค์›€์„ ๊ฒช๊ณ  ์žˆ๋‹ค.

ํŠนํžˆ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ ์œ ์œจ์ด ์ฆ๊ฐ€ํ•˜๋ฉด์„œ ์ˆ˜๊ธ‰๋ถˆ๊ท ํ˜•์— ์˜ํ•œ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ถœ๋ ฅ์ด ์ œ์•ฝ๋˜๋ฉด์„œ ๊ณ„ํ†ต์šด์˜์ž๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์žฌ์ƒ์—๋„ˆ์ง€ ์‚ฌ์—…์ž์—๊ฒŒ๋„ ๋งŽ์€ ์–ด๋ ค์›€์„ ๊ฒช๊ณ  ์žˆ๋‹ค. ์ด์šฉ๋ฅ ์ด ์ข‹์€ ํ•ด์ƒํ’๋ ฅ์˜ ์ ์œ ์œจ์ด ์ฆ๊ฐ€๋Š” ์ด๋Ÿฌํ•œ ์–ด๋ ค์›€์„ ๋”์šฑ ๊ฐ€์ค‘ ์‹œํ‚ฌ ์ „๋ง์ด๋‹ค. ํŠนํžˆ ์ „๋ ฅ์˜ ์ˆ˜์š”๊ฐ€ ์ œํ•œ์ ์ด๊ณ  ๊ณ ๋ฆฝ๋œ ๊ณ„ํ†ต์ธ ์ œ์ฃผ์ง€์—ญ์—์„œ๋Š” ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ ์œ ์œจ ์ฆ๊ฐ€๋กœ ์ธํ•˜์—ฌ ์ˆ˜๊ธ‰๋ถˆ๊ท ํ˜•์— ์˜ํ•œ ์ถœ๋ ฅ์ œ์•ฝ์ด ์ด๋ฏธ ๋‹ค์ˆ˜ ๋ฐœ์ƒํ•˜๊ณ  ์žˆ์–ด ์กฐ์†ํ•œ ๋Œ€์ฑ…์ด ํ•„์š”ํ•œ ์‹ค์ •์ด๋‹ค.

๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ๊ณผ๊ฑฐ ๋ฐ์ดํ„ฐ์˜ ๋ถ„์„์„ ํ†ตํ•˜์—ฌ 2023๋…„๋ถ€ํ„ฐ 2025๋…„๊นŒ์ง€์˜ ์žฌ์ƒ์—๋„ˆ์ง€ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์„ ์˜ˆ์ƒํ•˜์˜€๊ณ , ์—๋„ˆ์ง€๋ฏน์Šค ๋ฐ ESS ์šด์šฉ์„ ํ†ตํ•˜์—ฌ ์ถœ๋ ฅ์ œ์•ฝ์„ ์™„ํ™” ์‹œํ‚ค๋Š” ์ œ์ฃผ์ง€์—ญ ์ „๋ ฅ๊ณ„ํ†ต์˜ ์žฌ์ƒ์—๋„ˆ์ง€ ์ˆ˜์šฉ ์ฆ๋Œ€๋ฐฉ์•ˆ์„ ์ œ์‹œํ•˜์˜€๋‹ค.

์—๋„ˆ์ง€๋ฏน์Šค๋Š” PV : WP = 1 : 1.5์˜ ๋น„์œจ์—์„œ ์ถœ๋ ฅ์ œ์•ฝ๋Ÿ‰์ด ์ตœ์†Œ๋กœ ๋‚˜ํƒ€๋‚ฌ๊ณ , ESS(8์‹œ๊ฐ„ 110 MW)์˜ ์šด์˜์„ ํ†ตํ•˜์—ฌ ์•ฝ ESS๋ฅผ ์‚ฌ์šฉํ•˜์ง€ ์•Š์•˜์„ ๋•Œ์™€ ๋น„๊ตํ•˜์—ฌ ์•ฝ 50 GWh์˜ ์ถœ๋ ฅ์ œ์•ฝ ๊ฐ์†Œ ํšจ๊ณผ๋ฅผ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.

์ œ์ฃผ์ง€์—ญ ์ „๋ ฅ๊ณ„ํ†ต์˜ ์žฌ์ƒ์—๋„ˆ์ง€ ์ˆ˜์šฉ ํ™•๋Œ€๋ฅผ ์œ„ํ•œ ์ ์ • ๋น„์œจ์˜ ์—๋„ˆ์ง€๋ฏน์Šค ๋ฐฉ์•ˆ ์ˆ˜๋ฆฝ ๋ฐ ์žฌ์ƒ์—๋„ˆ์ง€์˜ ์ฆ์„ค๋Ÿ‰ ๊ฒฐ์ • ๊ทธ๋ฆฌ๊ณ  ์ ์ • ESS ์šฉ๋Ÿ‰ ๋ฐ ์šด์šฉ๋ฐฉ์•ˆ์„ ๊ฒฐ์ •ํ•˜๊ธฐ ์œ„ํ•ด ๋ณธ ๋…ผ๋ฌธ์„ ํ™œ์šฉํ•  ์ˆ˜ ์žˆ์„ ๊ฒƒ์œผ๋กœ ์‚ฌ๋ฃŒ ๋œ๋‹ค.

Acknowledgements

This research was supported by the 2020 scientific promotion program funded by Jeju National University

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์ €์ž์†Œ๊ฐœ

๋ช…ํ˜ธ์‚ฐ(Ho-San Myung)
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He received his B.S., M.S. degree from Jeju National University in 2010, 2013.

Currently, He is Ph.D candidate In Energy System Lab. of Jeju National University and he currently works as manager for SK D&D

๊น€์˜ํ™˜(Yeong-Hwan Kim)
../../Resources/kiee/KIEE.2021.70.8.1089/au2.png

He received his B.S. degree from Inha University and M.S., Ph.D degrees in Electrical Engineering from Jeju National University in 2006, 2020.

He is currently a head manager with Jeju branch office of Korea Power Exchange

๊น€์„ธํ˜ธ(Se-Ho Kim)
../../Resources/kiee/KIEE.2021.70.8.1089/au3.png

He received the B.S., M.S, and Ph.D. degrees in electrical engineering from Yonsei University, Seoul, Korea, in 1983, 1985, and 1992 respectively.

He is currently a professor with Jeju National University since 1993.