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Weekly Summary

Power: Sep 14- 18: Tardy autum pulls prices down with low E, high W

Electricity prices in Japan wholesale markets sagged in the week to September 18 in the belated autumn. Based on the Rim Power Index (Day ahead 24 hours), weekday power prices in the eastern market, including Hokkaido, Tohoku and Tokyo area, averaged out at 6.06 yen per kilowatt hour (kWh), down 4.07 yen/kWh or 40.2 % from the previous week, meanwhile prices in the western, made up of the Chubu, Hokuriku, Kansai, Chugoku, Shikoku and Kyushu area, at 6.48 yen/kWh, down 1.70 yen/kWh or 20.8%.

 

Temperatures eventually dropped to near levels consistent with the calendar in east Japan, but after heat of the summer limited west's drops. In east Japan, Tokyo's daily maximum temperatures were estimated on a day ahead basis at 31 Celsius degrees for Sep 14, 27C for Sep 15 and Sep 16, 30C for Sep 17, and 33C for Sep 18, Sendai's 28C, 26C, 27C, 27C and 30C Sapporo's 19C, 21C, 25C, 25C and 23C, whereas, in west, Osaka's 29C, 29C, 30C, 30C and 31C, Nagoya's 32C, 31C, 29C, 31C and 33C, Fukuoka's 28C, 30C, 29C, 29C and 25C.

 

The premium of Hokkaido to Tokyo narrowed to 0.74 yen/kWh from 1.16 yen/kWh recorded in the previous week, with Hokkaido's 24 hours average 6.75 yen/kWh (previous week's ave:11.21 yen) and Tokyo's 6.01 yen/kWh (10.05 yen), which are reckoned in conformity to data compiled by the Japan Electric Power Exchange (JEPX). Hokkaido prices often drift at higher levels than other areas especially in the winter season. Tokyo and Hokkaido's daytime average prices showed a much-bigger drop than night time.

Kansai's weekly average weakened to 6.54 yen/kWh from 8.42 yen/kWh, and Kyushu's declined to 6.23 yen/kWh from 7.25 yen/kWh. The difference of the two areas shrank to 0.31 yen/kWh from 1.17 yen/kWh seen in the prior week. Kansai area is the biggest market in the western Japan, and Kyushu's prices are incline to move at less expensive levels alongside of other areas. Unlike Kansai, Kyushu's average prices for night firmed up, appearing to dial back supply from non-solar power stations in the area.

 

On JEPX, the weekday average of System Price (Day ahead 24 hours), which were figured based on the data of 9 areas, tumbled by 2.83 yen/kWh or 32.5% to 5.87 yen/kWh, with the average volume decreasing by 4,890 megawatts per hour (MWh) or 4.9% to 929,506 compared to the prior week's.

 

JEPX: System Price (Day Ahead 24 hour)

Weekday Price

14-Sep

15-Sep

16-Sep

17-Sep

18-Sep

 

Average

24-Hour Ave

5.10

4.88

4.91

6.58

7.88

 

5.87

Volume (MWh)

924,871

936,789

937,439

905,852

942,578

 

929,506

(unit: yen per kWh) (date: delivery day)  

 

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