I'm sorry, I don't know even one Japanese word.

..?

Another option!

I ran across this term in connection with electricity regulation. I found a lot of references to it on the web but didn't really sort out what it is. The only bilingual hit I got was on the UCTE site which translates it as "regulating energy" if I recall correctly.

I've been using balancing energy. Regulatory energy could work as well. My original context was for the German market. I know Austria uses Ausgleichsenergie and I think Regelenergie as well, but I don't think Ausgleichsenergie is equal to the German "Regelenergie." I would then suggest "compensatory energy" and "balancing energy" for Austria, but maybe someone with more experience in Austria could correct me or explain this. It's difficult because the markets are not the same across the world. If you take "balancing energy" for "Regelenergie" in Germany, it might not be the same thing that is meant by the terms used in the States or the UK.

This is at least the term used in the English-language texts on (some) European sites (Swiss, Finnish, ...)

First, though, we need to know what 'Regelenergie' means, and that is:

Mit Regelenergie bezeichnet man die Mehr- und Mindermengen, die die Abweichungen des prognostizierten vom tatsächlichen Strombedarf des Kunden ausgleichen. Diese Mengen werden ausschließlich von den großen Übertragungsnetzbetreibern (RWE, e.on etc.) aufgenommen bzw. bereit gestellt. Im Gegensatz zu anderen Ländern mit liberalisiertem Strommarkt ist die Beschaffung und Bereitstellung von Regelenergie nicht wettbewerblich organisiert. Das hat gravierende Folgen insbesondere für kleinere Stromhändler wie Stadtwerke.
(http://www.gstbrp.de/energie/dokumente/neuigkeiten aus der e...

Next, some sample sites for 'balance power':

ref 1:
When SvK judges that there is a risk for Power Shortage during the current or following day, SvK can, at 4 hours notice, set a special price of 3000 SEK/MWh (350 ECU/kWh corresponding to about 20 times the normal price) for consumption of Balance power during those hours when the Power Shortage is expected.

The special price will only affect consumed Balance power for the hours that the price is set for. If a Power Shortage price warning has been sent out, the special price will apply, even if it subsequently proves that there is no longer a risk for Power Shortage for the hours in question.

ref 2:
Balance management


Operation with which a party of electricity trading aims to settle and influence, in advance or during the hour of use, how its electricity balance will be formed in a certain hour of use.

      Balance calculation


A general name for the technical procedure which is performed for the management and settlement of power balances.

      Balance border


A balance border is composed of connection point measurement(s).

      Balance reporting


Delivery of the results of balance calculation after the hour of use to the parties of electricity trading.

      Balance settler


A party which takes part in the settling of the power balance of a section of a power network or of a party of electricity trading and which provides the other balance settlers with information needed in their balance settlement.

      Balance settlement


Settlement of actual production, consumption and electricity transactions, taking place after the hour of use by the balance settler. The power balance of each party of electricity trading is obtained as a result of the balance settlement.

      Balance power


Electric energy used for covering the difference between actual power consumption/sales and generation/procurement of a party during an hour.


Through mutual trading in balance power, System balances the power procurement and deliveries of a balance responsible party which has made a balance service contract. The volume of balance power is determined on basis of the national balance settlement.

This document from Norway talks about regulating power.

http://www.eurelectric.org/docs/2001-030-0351-12.pdf