JPH08205404A - Economical load distributing apparatus for generator - Google Patents
Economical load distributing apparatus for generatorInfo
- Publication number
- JPH08205404A JPH08205404A JP7032958A JP3295895A JPH08205404A JP H08205404 A JPH08205404 A JP H08205404A JP 7032958 A JP7032958 A JP 7032958A JP 3295895 A JP3295895 A JP 3295895A JP H08205404 A JPH08205404 A JP H08205404A
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- Prior art keywords
- total amount
- generator
- unit price
- calculation
- generators
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- Control Of Eletrric Generators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電力系統における発電
機の経済負荷配分装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an economical load distribution device for a generator in a power system.
【０００２】[0002]
【従来の技術】電力系統における総需要は１日を周期と
して図４に示されるパターンで時間と共に変化する。自
動給電システムではこの総需要の変化を予測し、これに
見合う発電量を各発電機に発電させるために指令値を出
力する。各発電機にいくら発電させるかを決定するのに
総発電費用が最も安くなるような配分、即ち、経済負荷
配分方式（以下、ＥＬＤと称す）を用いて行なう。この
方式を用いて計算を実行するのが経済負荷配分装置（以
下、ＥＬＤ装置と称す）である。2. Description of the Related Art The total demand in a power system changes with time in a pattern shown in FIG. The automatic power supply system predicts the change in the total demand, and outputs a command value to cause each generator to generate a power generation amount commensurate with this. In order to determine how much power each generator should generate, the allocation is performed so that the total power generation cost is the lowest, that is, the economic load distribution method (hereinafter referred to as ELD) is used. An economic load distribution device (hereinafter referred to as an ELD device) executes calculations using this method.
【０００３】以下に経済負荷配分方式の一例である等増
分燃料費法による計算方式を説明する。今、ｎ台の発電
機の出力をＰ1 ，Ｐ2 ，……，Ｐn とし、各出力に対す
る燃料費をＦ１（Ｐ１），Ｆ２（Ｐ２），……，Ｆ
n （Ｐn ）とする。又、Ｆｉ（Ｐｉ）は(1) 式で表わさ
れ、発電量の増加に対する燃料費の増加、即ち、増分燃
料費は(2) 式で表わされる。A calculation method based on the equal incremental fuel cost method, which is an example of the economic load distribution method, will be described below. Now, let the outputs of n generators be P 1 , P 2 , ..., P n, and the fuel cost for each output is F 1 (P 1), F 2 (P 2) ,.
n (P n ). Further, Fi (Pi) is expressed by the equation (1), and the increase of the fuel cost with respect to the increase of the power generation amount, that is, the incremental fuel cost is expressed by the equation (2).
【数１】 Ｆｉ（Ｐｉ）＝Ａｉ＋ＢｉＰｉ＋ＣｉＰｉ2 ………(1) ｄＦｉ／ｄＰｉ＝Ｂｉ＋２ＣｉＰｉ …………(2) [Formula 1] Fi (Pi) = Ai + BiPi + CiPi 2 (1) dFi / dPi = Bi + 2CiPi (2)
【０００４】等増分燃料費の法則から、このｄＦｉ／ｄ
Ｐｉが等しくなるように各発電機の出力Ｐｉを決めれ
ば、総燃料費は最も安くなることが知られている。今、
ｄＦｉ／ｄＰｉ＝Ｂｉ＋２ＣｉＰｉ＝λとおくと、Ｐｉ
は(3) 式で表わされ、その結果λは(4) 式を満足するよ
うに選ばれる。又、λとＰｉとの関係は(5) 式の関係を
持つ。又、(3) 式に(5) 式を代入すると(6) 式となる。From the law of equal incremental fuel cost, this dFi / d
It is known that if the output Pi of each generator is determined so that Pi becomes equal, the total fuel cost becomes the lowest. now,
If dFi / dPi = Bi + 2CiPi = λ, then Pi
Is expressed by Eq. (3), so that λ is selected so as to satisfy Eq. (4). The relationship between λ and Pi has the relationship of equation (5). Substituting equation (5) into equation (3) yields equation (6).
【数２】 [Equation 2]
【０００５】図５は従来装置の構成図であり、ＥＬＤ配
分総量計算手段10にて発電すべき総量を計算し、11にて
各発電機への配分量を求め、ここで求めた結果を発電機
指令出力手段12にて各発電機へ指令する構成を有してい
る。FIG. 5 is a block diagram of a conventional device, in which the total amount of electricity to be generated is calculated by the ELD distribution total amount calculating means 10, the distribution amount to each generator is calculated at 11, and the result calculated here is generated. The machine command output means 12 has a configuration for instructing each generator.
【０００６】[0006]
【発明が解決しようとする課題】一方、発電機の中には
発電機の特定グループ単位で、指定された期間内に発電
すべき総量が決まっているものがある。ＥＬＤの配分対
象機とその中に含まれる総量指定制約有りの発電機群の
関係は図４に表した通りであるとする。このことは、発
電機群ｉにおいて例えば発電機１及び２はＥＬＤ配分対
象でかつ総量指定の制約のないもの、発電機３及び４は
ＥＬＤ配分対象でかつそのグループ内で総量指定の制約
のあるものであることを意味する。On the other hand, in some generators, the total amount of power to be generated within a designated period is determined for each specific group of generators. It is assumed that the relationship between the ELD distribution target machines and the generator group that is included therein and has a total quantity designation constraint is as shown in FIG. This means that, for example, in the generator group i, the generators 1 and 2 are ELD allocation targets and there is no constraint for specifying the total amount, and the generators 3 and 4 are ELD allocation targets and there is a constraint for specifying the total amount within the group. It means that it is a thing.
【０００７】各計算時間帯毎に各発電機は前記(6) 式に
示される配分式により、配分値が一率に決定されてい
る。しかし上記したように発電機によっては総量指定の
制約のあるものがあるため、各発電機ｉの全計算時間帯
の配分値の総和（総量）は必ずしも総量指定値と一致し
ない。The distribution value of each generator is determined at a rate for each calculation time zone by the distribution equation shown in the above equation (6). However, as described above, some generators have restrictions for specifying the total amount. Therefore, the total sum (total amount) of distribution values of all the generators i in all calculation time zones does not necessarily match the total amount specified value.
【数３】 本発明は上記課題を解決するためになされたものであ
り、グループ単位で総量指定値の制約を維持しながらＥ
ＬＤの配分を可能とする発電機の経済負荷配分装置を提
供することを目的としている。(Equation 3) The present invention has been made to solve the above-mentioned problems, and E while maintaining the constraint of the total amount designation value in group units.
It is an object of the present invention to provide an economical load distribution device for a generator that enables LD distribution.
【０００８】[0008]
【課題を解決するための手段】図１は本発明の構成図で
あり、本発明の［請求項１］に係る発電機の経済負荷配
分装置は、指定された期間分の予測総需要を入力し、発
電機群に対する配分計算にて各発電機への負荷配分を行
なう発電機の経済負荷配分装置において、前記配分結果
をもとに各発電機の全計算時間帯の計算値から平均単価
を求め、かつ各発電機の平均単価から全発電機の等価単
価を求める等価単価計算手段と、発電機群の中の特定の
グループに対し、指定された期間内で発電すべき総量を
指定する総量指定値設定手段と、指定された総量制約を
守りながら、特定グループ内の発電機に対し配分計算を
実施する総量指定収れん計算手段とを備えた。FIG. 1 is a block diagram of the present invention. An economic load distribution system for a generator according to claim 1 of the present invention inputs predicted total demand for a designated period. Then, in the generator economic load distribution device that distributes the load to each generator by the distribution calculation for the generator group, the average unit price is calculated from the calculated values of all the calculation time zones of each generator based on the distribution result. Equivalent unit price calculation means to obtain the equivalent unit price of all generators from the average unit price of each generator, and the total amount that specifies the total amount of electricity that should be generated within a specified period for a specific group of generators. A designated value setting means and a designated total amount convergence calculation means for carrying out the distribution calculation for the generators in the specific group while keeping the designated total quantity constraint.
【０００９】本発明の［請求項２］に係る発電機の経済
負荷配分装置は、［請求項１］において、等価単価計算
手段は、総量指定制約がある同一グループ内の各発電機
について、全計算時間帯に亘る平均カロリー単価を求め
ると共に、前記各発電機毎の平均カロリー単価をもとに
総量指定制約がある同一グループ内の全発電機の平均値
を求める機能を有すると共に、総量指定収れん計算手段
は、各発電機毎に設定された総量指定値を設定する総量
指定値設定手段と、総量指定制約有りの発電機群の等価
単価の関数である総発電量計算値が前記総量指定値設定
手段による指定値に収束するように等価単価を修正する
機能を有するものである。According to a second aspect of the present invention, there is provided an economical load distribution device for a generator according to the first aspect, wherein the equivalent unit price calculation means is a unit for all the generators in the same group having a total quantity designation constraint. Along with the function to calculate the average calorie unit price over the calculation time zone, and to calculate the average value of all generators in the same group with the total amount specification constraint based on the average calorie unit price of each generator, the total amount specified convergence The calculation means is a total quantity specified value setting means for setting the total quantity specified value set for each generator, and the total generated quantity calculation value that is a function of the equivalent unit price of the generator group with the total quantity specification constraint is the total quantity specified value. It has a function of correcting the equivalent unit price so as to converge to the value specified by the setting means.
【００１０】[0010]
【作用】次に作用について説明すると、先ず、ＥＬＤ配
分計算手段11の計算結果をもとに、等価単価計算手段13
で各発電機の全計算時間帯の計算値から平均単価を求
め、互いに各発電機の平均単価から全発電機の等価単価
を求める。次に総量指定収れん計算手段14でこの全発電
機等価単価を増減させることにより、総量指定を総量指
定値設定手段15から設定される総量指定の制約条件を考
慮しながらＥＬＤ配分計算を実施するものである。Next, the operation will be described. First, based on the calculation result of the ELD distribution calculation means 11, the equivalent unit price calculation means 13
Then, the average unit price is calculated from the calculated values of all the generators in each calculation period, and the equivalent unit price of all the generators is calculated from the average unit price of each generator. Next, the ELD distribution calculation is performed by increasing / decreasing the total generator equivalent unit price by the total amount designated convergence calculation means 14 while taking into account the total amount designation constraint condition set by the total amount designated value setting means 15. Is.
【００１１】等価単価計算手段13及び総量指定収れん計
算手段14について更に詳細に説明する。等価単価計算手
段13は以下の機能を持つ。先ず、総量指定発電機の平均
単価（ＥＣＴ）の考え方と算出方法について説明する。
ＥＬＤ配分計算は、前記(5)式により求められる等増分
燃料費λを求め、各発電機が等しいλとなるような配分
値Ｐｉを決定するものである。The equivalent unit price calculation means 13 and the total amount designated convergence calculation means 14 will be described in more detail. The equivalent unit price calculation means 13 has the following functions. First, the concept and calculation method of the average unit price (ECT) of the total amount designated generator will be described.
The ELD distribution calculation is to calculate the equal incremental fuel cost λ calculated by the above equation (5) and to determine the distribution value Pi such that each generator has the same λ.
【００１２】ここで、新たにカロリー単価，熱消費量と
いう概念を導入し、下記(8) 式を定義する。Here, the following concepts (8) are defined by newly introducing the concepts of calorie unit price and heat consumption.
【数４】 [Equation 4]
【００１３】ＥＬＤ配分計算の結果の時間ｔにおける配
分値Ｐitについて考えた場合、ある計算時間帯ｔにおけ
るカロリー単価Ｕitは全時間帯ｔ１〜Ｔに亘りほぼ等し
い。When the distribution value P it at the time t as a result of the ELD distribution calculation is considered, the calorie unit price U it at a certain calculation time zone t is substantially equal over all the time zones t1 to T.
【数５】 (Equation 5)
【００１４】総量指定制約がある同一グループ内の各発
電機について、全計算時間帯に亘る平均カロリー単価
（ＥＱＣｉ）をカロリー単価（Ｕｉｔ）より求める。The average calorie unit price (EQCi) over all calculation time zones is calculated from the calorie unit price (Uit) for each generator in the same group having a total quantity designation constraint.
【数６】 (Equation 6)
【００１５】次に発電機毎の平均カロリー単価（ＥＱＣ
i ）をもとに総量指定制約がある同一グループの全発電
機の平均値（以下、等価単価と称す）を求める。今、等
価単価ＥＱＣＴと置くと、Next, the average calorie unit price (EQC
Based on i ), find the average value (hereinafter referred to as the equivalent unit price) of all generators in the same group that have restrictions on the total amount. Now, when putting it with the equivalent unit price EQCT,
【数７】 (Equation 7)
【００１６】次に総量指定収れん計算手段14について機
能を説明する。総量指定制約有りの発電機群の等価単価
（ＥＱＣＴ）の関数である総発電量計算値（ＥＴ）が、
総量指定値（ＥＴref ）に収束するように等価単価（Ｅ
ＱＣＴ）を修正していくことになり、この解法はＮＥＷ
ＴＯＮ ＲＡＰＨＳＯＮ法に相当する方法で行なう。Next, the function of the total amount designated convergence calculation means 14 will be described. The calculated total power generation amount (ET), which is a function of the equivalent unit price (EQCT) of the generator group with the total amount designation constraint,
Equivalent unit price (E) so that it converges to the total amount specified value (ET ref ).
QCT) will be modified and this solution will be NEW
The method is equivalent to the TON RAPHSON method.
【００１７】[0017]
【数８】 (Equation 8)
【００１８】つまり、ＮＥＷＴＯＮ ＲＡＰＨＳＯＮ法
による解法を図示すると図３のようになる。初期値の等
価単価Ｃｈをとり、点（Ｃｈ，ｆ（Ｃｈ））における接
点を引き、この接続と（Ｆ（Ｃｈ）−ＥＴref ）の交点
をＣｈ＋１とし、順次Ｃｈを更新していく方法である。
このように(13)式の繰り返し計算の中で、総量指定値
（ＥＴref ）に収束する等価単価（Ｃｎ）及びその時の
燃料和（Ｆ（Ｃｎ））を求めることができる。That is, the solution method by the NEWTON RAPHSON method is illustrated in FIG. The equivalent unit price Ch of the initial value is taken, the contact at the point (Ch, f (Ch)) is drawn, the intersection of this connection and (F (Ch) -ET ref ) is set to Ch + 1, and Ch is updated sequentially. is there.
Thus, in the iterative calculation of the equation (13), the equivalent unit price (Cn) that converges to the total amount designation value (ET ref ) and the fuel sum (F (Cn)) at that time can be obtained.
【００１９】以上が従来機能であるＥＬＤ配分計算の結
果をもとに、等価単価計算手段13で各発電機の全計算時
間帯の計算値から等価単価を求め、かつ各発電機の等価
単価から全発電機の平均単価を求め、更に総量指定収れ
ん計算手段14でこの平均単価の増減により、総量指定値
設定手段15から設定される総量指定の制約条件を考慮し
ながらＥＬＤ配分計算を行なうものである。Based on the result of the ELD distribution calculation, which is a conventional function, the equivalent unit price calculation means 13 obtains the equivalent unit price from the calculated values of all the generators in all calculation time zones, and from the equivalent unit price of each generator. The average unit price of all generators is calculated, and the ELD distribution calculation is performed by the total amount designation convergence calculation means 14 by increasing or decreasing this average unit price while considering the constraint condition of the total amount designation set by the total amount designation value setting means 15. is there.
【００２０】要するに、総量指定収れん計算手段14の計
算結果は従来のＥＬＤ配分計算手段11の計算結果をもと
に、総量指定制約有りの発電機群の総量が大きい場合
は、その時の等価単価を微小分小さくすることにより、
又、小さい場合は微小分大きくすることにより、指定さ
れた総量に一致するまで等価単価を変動させ、収れん計
算を実施するものであり、この収れん計算により総量指
定制約を満足した配分計算を行なうことができる。In short, the calculation result of the total amount designation convergence calculation means 14 is based on the calculation result of the conventional ELD distribution calculation means 11, and when the total amount of the generator group with the total amount specification constraint is large, the equivalent unit price at that time is calculated. By making it small,
If the value is small, the equivalent unit price is changed by increasing the value by a small amount until it matches the specified total amount, and the convergence calculation is performed. By this convergence calculation, the distribution calculation that satisfies the total amount specification constraint is performed. You can
【００２１】[0021]
【実施例】図３は本発明の発電機の経済負荷配分装置の
一実施例の構成図である。図３では電力系統用計算機シ
ステムに本発明を組み込んだ例である。図３において、
電力系統情報入力手段31は図１におけるＥＬＤ配分総量
計算手段10と対応し、ＥＬＤ装置33は図１における11，
12，13，14，15の機能を包含する。又、データベース34
はＥＬＤ計算に必要とする発電機の燃料特性定数等のデ
ータを格納しているディスク装置、４は電力系統であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a block diagram of an embodiment of the economical load distribution system for a generator of the present invention. FIG. 3 shows an example in which the present invention is incorporated in a power system computer system. In FIG.
The electric power system information input means 31 corresponds to the ELD distribution total amount calculation means 10 in FIG. 1, and the ELD device 33 corresponds to 11, 11 in FIG.
It includes 12, 13, 14, and 15 functions. Also, the database 34
Is a disk device that stores data such as a fuel characteristic constant of a generator required for ELD calculation, and 4 is an electric power system.
【００２２】次に作用について説明する。電力系統情報
入力手段31では、電力系統４からの入力情報をもとにし
て、ＥＬＤ配分総量を求める。ＥＬＤ装置33では前記電
力系統情報入力手段31で求めたＥＬＤ配分総量に対し
て、データベース34内に格納された発電機の燃料特性定
数等のデータを適用して、(6) 式による配分計算を実施
する。Next, the operation will be described. The electric power system information input means 31 calculates the total ELD distribution amount based on the input information from the electric power system 4. In the ELD device 33, the data such as the fuel characteristic constant of the generator stored in the database 34 is applied to the total ELD distribution obtained by the electric power system information input means 31 to calculate the distribution by the formula (6). carry out.
【００２３】そして出力として各発電機について図４で
示される配分値を決定する。なお、各配分値は平均指令
出力手段から出力される。本実施例によれば、各発電機
グループ単位で総量指定値の制約を維持しながらＥＬＤ
の配分を可能とする。Then, as an output, the distribution value shown in FIG. 4 is determined for each generator. Each distribution value is output from the average command output means. According to the present embodiment, the ELD is performed while maintaining the constraint of the total amount designation value for each generator group.
Is possible.
【００２４】[0024]
【発明の効果】以上説明したように、本発明によればＥ
ＬＤ配分値の決定に際して、各発電機の総量指定制約を
考慮する構成としたので、発電機グループ単位で総量指
定値の制約を維持しながら合理的なＥＬＤの配分が可能
となる。As described above, according to the present invention, E
When the LD distribution value is determined, the total amount designation constraint of each generator is taken into consideration, so that it is possible to rationally distribute the ELD while maintaining the constraint of the total amount designation value for each generator group.
【図１】本発明に係る発電機の経済負荷配分装置の機能
構成図。FIG. 1 is a functional configuration diagram of an economical load distribution device for a generator according to the present invention.
【図２】総量指定収れん計算におけるＮＥＷＴＯＮ Ｒ
ＡＰＨＳＯＮ法の動きを表わした図。[Fig.2] NEWTON R in total amount specified convergence calculation
The figure showing the movement of the APHSON method.
【図３】本発明に係る発電機の経済負荷配分装置の一実
施例の構成図。FIG. 3 is a configuration diagram of an embodiment of an economical load distribution device for a generator according to the present invention.
【図４】総需要及びＥＬＤ配分総量を表わす図。FIG. 4 is a diagram showing total demand and total ELD distribution.
【図５】従来の発電機の経済負荷配分装置の構成図。FIG. 5 is a configuration diagram of a conventional economic load distribution device for a generator.
１ ＥＬＤ装置 10 ＥＬＤ配分総量計算手段 11 ＥＬＤ配分計算手段 12 発電機指令出力手段 13 等価単価計算手段 14 総量指定収れん計算手段 15 総量指定値設定手段 1 ELD device 10 ELD distribution total amount calculation means 11 ELD distribution calculation means 12 Generator command output means 13 Equivalent unit price calculation means 14 Total amount designated convergence calculation means 15 Total amount designated value setting means
Claims (2)
し、発電機群に対する配分計算にて各発電機への負荷配
分を行なう発電機の経済負荷配分装置において、前記配
分結果をもとに各発電機の全計算時間帯の計算値から平
均単価を求め、かつ各発電機の平均単価から全発電機の
等価単価を求める等価単価計算手段と、発電機群の中の
特定のグループに対し、指定された期間内で発電すべき
総量を指定する総量指定値設定手段と、指定された総量
制約を守りながら、特定グループ内の発電機に対し配分
計算を実施する総量指定収れん計算手段とを備えたこと
を特徴とする発電機の経済負荷配分装置。1. An economic load distribution device for a generator, which inputs predicted total demand for a specified period and performs load distribution to each generator by distribution calculation for the generator group, based on the distribution result. The average unit price is calculated from the calculated values of all generators in each calculation time period, and the equivalent unit price calculation method that calculates the equivalent unit price of all generators from the average unit price of each generator and a specific group in the generator group On the other hand, a total amount specified value setting means for specifying the total amount of electricity to be generated within the specified period, and a total amount specified astringent calculation means for performing allocation calculation for the generators in a specific group while complying with the specified total amount constraint. An economic load distribution device for a generator, characterized by comprising:
る同一グループ内の各発電機について、全計算時間帯に
亘る平均カロリー単価を求めると共に、前記各発電機毎
の平均カロリー単価をもとに総量指定制約がある同一グ
ループ内の全発電機の平均値を求める機能を有すると共
に、総量指定収れん計算手段は、各発電機毎に設定され
た総量指定値を設定する総量指定値設定手段と、総量指
定制約有りの発電機群の等価単価の関数である総発電量
計算値が前記総量指定値設定手段による指定値に収束す
るように等価単価を修正する機能を有することを特徴と
する請求項１記載の発電機の経済負荷配分装置。2. The equivalent unit price calculation means obtains an average calorie unit price over all calculation time zones for each generator in the same group having a total amount designation constraint, and based on the average calorie unit price for each generator. In addition to having the function to calculate the average value of all generators in the same group with the total amount specified constraint, the total amount specified convergence calculation means is the total amount specified value setting means for setting the total amount specified value set for each generator. , A function of correcting the equivalent unit price so that the total generated power calculation value, which is a function of the equivalent unit price of the generator group with the total amount specifying constraint, converges to the value specified by the total amount specified value setting means. Item 1. An economic load distribution device for a generator according to Item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7032958A JPH08205404A (en) | 1995-01-30 | 1995-01-30 | Economical load distributing apparatus for generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7032958A JPH08205404A (en) | 1995-01-30 | 1995-01-30 | Economical load distributing apparatus for generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08205404A true JPH08205404A (en) | 1996-08-09 |
Family
ID=12373440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7032958A Pending JPH08205404A (en) | 1995-01-30 | 1995-01-30 | Economical load distributing apparatus for generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08205404A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084661A (en) * | 2000-06-22 | 2002-03-22 | Osaka Gas Co Ltd | Forming method for power supply plan |
| JP2003284242A (en) * | 2002-03-22 | 2003-10-03 | Meidensha Corp | Device and method for creating start and stop program of generator |
| JP2006077636A (en) * | 2004-09-08 | 2006-03-23 | Chugoku Electric Power Co Inc:The | Pumping fuel cost calculation device, pumping fuel cost calculation method and program |
-
1995
- 1995-01-30 JP JP7032958A patent/JPH08205404A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084661A (en) * | 2000-06-22 | 2002-03-22 | Osaka Gas Co Ltd | Forming method for power supply plan |
| JP2003284242A (en) * | 2002-03-22 | 2003-10-03 | Meidensha Corp | Device and method for creating start and stop program of generator |
| JP2006077636A (en) * | 2004-09-08 | 2006-03-23 | Chugoku Electric Power Co Inc:The | Pumping fuel cost calculation device, pumping fuel cost calculation method and program |
| JP4627645B2 (en) * | 2004-09-08 | 2011-02-09 | 中国電力株式会社 | Pumped fuel cost calculation device, pumped fuel cost calculation method, and program |
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