JPH07231569A - Unit for determining distribution of generated power - Google Patents
Unit for determining distribution of generated powerInfo
- Publication number
- JPH07231569A JPH07231569A JP6022582A JP2258294A JPH07231569A JP H07231569 A JPH07231569 A JP H07231569A JP 6022582 A JP6022582 A JP 6022582A JP 2258294 A JP2258294 A JP 2258294A JP H07231569 A JPH07231569 A JP H07231569A
- Authority
- JP
- Japan
- Prior art keywords
- power
- cost
- power generation
- private
- distribution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、産業用発電プラントに
おける買電／自家発電の最適配分を決定する発電配分決
定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation distribution determining apparatus for determining the optimum distribution of power purchase / in-house power generation in an industrial power plant.
【０００２】[0002]
【従来の技術】消費量が可変する工場消費電力を買電と
自家発電の両方で賄う場合、従来は電力消費量をすべて
買電で賄った場合とすべて自家発電で賄った場合とを比
較し、買電が安い場合は自家発電量を最小、逆の場合は
自家発電量を最大となる配分とする方法か、あるいは該
電力消費量に対してコストの評価関数を最小とする配分
を収束計算によって求める方法が採られていた。2. Description of the Related Art In the case where factory power consumption with variable power consumption is covered by both power purchase and private power generation, the conventional method compares the case where all power consumption is covered by power purchase and private power generation. , If the power purchase is cheap, the private power generation amount is the minimum, in the opposite case, the private power generation amount is the maximum distribution, or the distribution that minimizes the cost evaluation function to the power consumption is calculated. The method of seeking by was adopted.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、自家発
電に要するコストは使用する燃料、運転するユニット数
により自家発電量の一次関数とはならないため、上記前
者の方法は必ずしも最適な配分とはならない。However, since the cost required for private power generation does not become a linear function of the private power generation amount depending on the fuel used and the number of units to be operated, the former method is not always the optimum distribution.
【０００４】また、上記後者の収束計算によって求める
方法では、例えばミニコンピュータ程度の計算機で数時
間を要するように、計算に多大な時間と記憶装置の容量
とを必要とするという不具合があった。Further, the latter method of calculating by the convergence calculation has a problem in that the calculation requires a large amount of time and the capacity of the storage device such that a computer such as a mini computer requires several hours.
【０００５】本発明は上記のような実情に鑑みてなされ
たもので、その目的とするところは、電力消費量に対す
るコストが最小となる買電と自家発電の最適な配分を簡
易な装置で且つ短時間のうちに求めることが可能な発電
配分決定装置を提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simple device for optimal distribution of power purchase and private power generation that minimizes the cost with respect to power consumption. An object is to provide a power generation distribution determination device that can be obtained in a short time.
【０００６】[0006]
【課題を解決するための手段】すなわち本発明は、コス
トを考慮した全電力消費量に対する買電と自家発電との
最適配分を示す最適コスト曲線を予め求めておき、実際
に必要となる電力量から上記最適コスト曲線を参照して
買電と自家発電との最適配分を得るようにしたものであ
る。That is, according to the present invention, an optimum cost curve showing the optimum distribution of power purchase and private power generation with respect to the total power consumption in consideration of cost is obtained in advance, and the actually required power amount is From the above, the optimum distribution of power purchase and private power generation is obtained by referring to the above-mentioned optimum cost curve.
【０００７】[0007]
【作用】上記のような構成によれば、電力消費量に対す
るコストが最小となる買電と自家発電の最適な配分を例
えばパーソナルコンピュータ程度の非常に簡易な装置で
数分程度の短時間のうちに求めることが可能となる。According to the above configuration, the optimum distribution of power purchase and private power generation that minimizes the cost with respect to the power consumption can be achieved with a very simple device such as a personal computer in a short time of about several minutes. It is possible to ask.
【０００８】[0008]
【実施例】以下本発明をパーソナルコンピュータに適用
した場合の一実施例について図面を参照して説明する。
図１は装置全体の概略構成を示すもので、11は各種パラ
メータや演算の指示等をキー入力するためのキーボード
（ＫＢ）、12はキーボード11のキー入力を受けて演算を
実行する、ＣＰＵを備えた装置本体、13は演算プログラ
ムその他の固定情報を予め記憶すると共に、演算を実行
して得られた結果を格納する外部記憶装置としてのハー
ドディスク装置（ＨＤＤ）、14は演算結果を表示出力す
る表示器としてのＣＲＴ、15は同じく演算結果を印字出
力するプリンタ（ＰＲＴ）である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a personal computer will be described below with reference to the drawings.
FIG. 1 shows a schematic configuration of the entire apparatus. Reference numeral 11 is a keyboard (KB) for key-inputting various parameters and calculation instructions. A device main body provided, 13 is a hard disk device (HDD) as an external storage device that stores a calculation program and other fixed information in advance, and stores the result obtained by executing the calculation, and 14 displays and outputs the calculation result A CRT, 15 as a display is a printer (PRT) which prints out the calculation result.
【０００９】上記のような構成にあって、図２は図１の
装置による演算の処理手順を示すもので、ハードディス
ク装置13に記憶される演算プログラムを装置本体12内の
メモリにロードさせた上で、キーボード11で全体の電力
消費量と自家発電パラメータ（燃料単価、発電効率等）
及び買電単価を入力し、さらに演算の実行を指示する
と、これらパラメータ等の入力を一旦ハードディスク装
置13に格納した後、装置本体12で該プログラムが実行さ
れる。FIG. 2 shows the processing procedure of the arithmetic operation by the apparatus of FIG. 1 having the above-mentioned structure. The arithmetic program stored in the hard disk device 13 is loaded into the memory in the main body 12 of the apparatus. With the keyboard 11, the total power consumption and in-house power generation parameters (fuel unit price, power generation efficiency, etc.)
When the unit price of electricity purchase is input and the execution of calculation is further instructed, the input of these parameters and the like is temporarily stored in the hard disk device 13, and then the program is executed in the device main body 12.
【００１０】この演算プログラムでは、まず自家発電コ
スト演算として上記電力消費量をすべて自家発電で賄っ
た場合のコストＹGSが各消費電力量に対して演算出力さ
れる。In this calculation program, the cost YGS when the above power consumption is entirely covered by private power generation is calculated and output for each power consumption as a private power generation cost calculation.
【００１１】その後、最適配分演算として買電単価ＣP
と上記自家発電コストＹGSに基づき、各消費電力におけ
る最小コストを消費電力最小に対するものから順次演算
し、後述する最適コスト曲線Ｙを求める。この間に同時
に買電量と自家発電量を求めることができるため、配分
を決定することができる。After that, the power purchase unit price CP
Based on the above-mentioned private power generation cost YGS, the minimum cost in each power consumption is sequentially calculated from the one for the minimum power consumption to obtain an optimum cost curve Y described later. During this time, the amount of power purchased and the amount of private power generation can be obtained at the same time, so the distribution can be determined.
【００１２】こうして得た最適コスト曲線Ｙと配分とを
ハードディスク装置13に格納すると共に、ＣＲＴ14で表
示出力、プリンタ15で印字出力する。一旦最適コスト曲
線Ｙをハードディスク装置13に格納してしまった後は、
上記各消費電力量に対する演算出力を行なう必要がない
ため、これを再ロードして所望の消費電力量を与えるこ
とで簡単に最適な配分を得ることができるようになる。The optimum cost curve Y and the distribution thus obtained are stored in the hard disk device 13 and displayed on the CRT 14 and printed on the printer 15. Once the optimum cost curve Y has been stored in the hard disk drive 13,
Since it is not necessary to perform the calculation output for each of the above power consumptions, the optimum distribution can be easily obtained by reloading this and giving a desired power consumption.
【００１３】次いで上記装置本体12が実行する演算の内
容について詳細に説明する。演算実行時には、まず消費
電力をすべて自家発電で賄った場合の自家発電コストＹ
GSを求める。この自家発電コストＹGSは、工場の消費電
力に自家発電プランと消費電力を加えた総消費電力と、
発電効率から求められる自家発電プラントの燃料消費率
に燃料単価を乗ずることにより求まる。Next, the contents of the calculation executed by the apparatus body 12 will be described in detail. At the time of execution of calculation, first, the in-house power generation cost Y when all power consumption is covered by in-house power generation
Ask for GS. This in-house power generation cost YGS is the total power consumption obtained by adding the in-house power generation plan and power consumption to the power consumption of the factory,
It can be obtained by multiplying the fuel consumption rate of the private power generation plant, which is obtained from the power generation efficiency, by the fuel unit price.
【００１４】また、逆にすべてを買電で賄った場合のコ
ストは、自家発電量が「０（ゼロ）」の場合の自家発電
維持コスト（ベースコスト）ＹB に買電単価ＣP と買電
量ＥP とを乗じたものを加えた値「ＣP ×ＥP ＋ＹB 」
となるもので、これらの関係を図３に例示する。同図
で、消費電力量Ｅｋにおけるコストは、曲線ＹGSの下側
に接する傾きＣP の接線Ｔの接点位置での消費電力量Ｅ
ｊ分だけ自家発電で賄い、残りの「Ｅｋ−Ｅｊ」を買電
で賄った場合に最小となるもので、このときの配分値は
「（Ｅｋ−Ｅｊ）／Ｅｊ」となる。On the other hand, the cost when all is covered by electricity purchase is the electricity generation maintenance cost (base cost) YB when the electricity generation amount is "0 (zero)", the electricity purchase unit price CP and the electricity purchase amount EP. Value obtained by multiplying by and "CP x EP + YB"
Therefore, these relationships are illustrated in FIG. In the figure, the cost in the power consumption Ek is the power consumption E at the contact position of the tangent line T of the slope CP that touches the lower side of the curve YGS.
This is the minimum when the power is covered by private power generation for j minutes and the remaining "Ek-Ej" is covered by power purchase, and the distribution value at this time is "(Ek-Ej) / Ej".
【００１５】したがって、これらのコスト最小の点を結
ぶ最適コスト曲線Ｙは図４に太い実線で示す通りとな
る。この最適コスト曲線Ｙを実際に装置本体12が得るた
めの演算処理手順を図５に示す。Therefore, the optimum cost curve Y connecting these points with the minimum cost is as shown by the thick solid line in FIG. FIG. 5 shows an arithmetic processing procedure for the apparatus body 12 to actually obtain the optimum cost curve Y.
【００１６】すなわち、変数ｉ（ｉ＝１，２，…）に初
期値「１」を設定すると共に、最適コスト曲線Ｙの関数
Ｙ(i) の初期値に初期値としてベースコストＹB を最適
コスト曲線Ｙの関数Ｙ(0) に入力する（ステップＳ
１）。That is, an initial value "1" is set for the variable i (i = 1, 2, ...), and the base cost YB is set as the initial cost for the initial value of the function Y (i) of the optimum cost curve Y. Input to the function Y (0) of the curve Y (step S
1).
【００１７】次いで、消費電力の計算刻み幅（増分）Δ
Ｅ(i) として「Ｅ(i) −Ｅ(i-1) 」を代入し（ステップ
Ｓ２）、この消費電力の増分ΔＥ(i) をすべて買電で賄
い、前時点での消費電力量Ｅ(i-1) をその最低コスト配
分で賄った場合のコスト「Ｙ(i-1) ＋ΔＥ(i) ×ＣP 」
と、消費電力量Ｅ(i) すべてを自家発電で賄った場合の
コストＹGS(i) を比較判断する（ステップＳ３）。Next, the calculation step width (increment) Δ of the power consumption
Substituting "E (i) -E (i-1)" as E (i) (step S2), all the increment ΔE (i) of the power consumption is covered by the power purchase, and the power consumption E at the previous time point is calculated. "Y (i-1) + ΔE (i) x CP", which is the cost when (i-1) is covered by the minimum cost allocation
And the cost YGS (i) when all the power consumption E (i) is covered by private power generation are compared (step S3).
【００１８】上記比較の結果、自家発電コストＹGS(i)
の方が安いと判断した場合には、消費電力量Ｅ(i) の最
低コストＹ(i) を自家発電コストＹGS(i) とし、このと
きの買電量ＥP(1)を「０」、自家発電量ＥG(1)をＥ(i)
とする（ステップＳ４）。As a result of the above comparison, the private power generation cost YGS (i)
If it is decided that the cost is lower, the lowest cost Y (i) of the power consumption E (i) is set as the private power generation cost YGS (i), and the power purchase amount EP (1) at this time is “0”, Generated power EG (1) is E (i)
(Step S4).
【００１９】またこれとは反対に上記比較の結果、自家
発電コストＹGS(i) の方が高いと判断した場合には、前
時点での消費電力量Ｅ(i-1) の最低コストＹ(i-1) に増
分の買電コスト「ΔＥ(i) ×ＣP 」を加えた値を消費電
力量Ｅ(i) の最低コストＹ(i) とし、このときの買電量
ＥP(1)は前時点の消費電力Ｅ(i-1) に増分ΔＥ(i) を加
えた値、自家発電量ＥG(1)は前時点の消費電力Ｅ(i-1)
に対する自家発電量ＥG(i-1)のままとする（ステップＳ
５）。On the contrary, as a result of the above comparison, when it is determined that the private power generation cost YGS (i) is higher, the lowest cost Y (of the power consumption amount E (i-1) at the previous time point Y ( i-1) is the minimum cost Y (i) of the power consumption E (i), which is obtained by adding the incremental power purchase cost "ΔE (i) x CP". The value obtained by adding the increment ΔE (i) to the power consumption E (i-1) at the time, the in-house power generation amount EG (1) is the power consumption E (i-1) at the previous time.
The amount of in-house power generation EG (i-1) is kept as it is (step S
5).
【００２０】こうして比較結果に対応した新たな設定を
実行後、次の計算刻みに備えて変数ｉを「＋１」更新設
定し（ステップＳ６）、再び上記ステップＳ２からの処
理を繰返し実行することで、上記図４の最適コスト曲線
Ｙを得ることができる。After the new setting corresponding to the comparison result is executed in this way, the variable i is updated and set to "+1" in preparation for the next calculation step (step S6), and the processing from step S2 is repeatedly executed again. The optimum cost curve Y in FIG. 4 can be obtained.
【００２１】しかるに、こうして装置本体12で得られた
最適コスト曲線Ｙはハードディスク装置13に格納され、
以後買電／自家発電の配分決定演算を行なう毎にこれが
読出されて参照される。However, the optimum cost curve Y thus obtained by the apparatus main body 12 is stored in the hard disk drive 13,
Thereafter, this is read out and referred to each time the calculation for determining allocation of power purchase / in-house power generation is performed.
【００２２】[0022]
【発明の効果】以上に述べた如く本発明によれば、電力
消費量に対するコストが最小となる買電と自家発電の最
適な配分を例えばパーソナルコンピュータ程度の非常に
簡易な装置で数分程度の短時間のうちに求めることが可
能な発電配分決定装置を提供することができる。As described above, according to the present invention, the optimum distribution of power purchase and private power generation, which minimizes the cost with respect to the power consumption, can be achieved with a very simple device such as a personal computer for about several minutes. It is possible to provide a power generation distribution determination device that can be obtained in a short time.
【図１】本発明の一実施例に係る装置全体の概略構成を
示すブロック図。FIG. 1 is a block diagram showing a schematic configuration of an entire apparatus according to an embodiment of the present invention.
【図２】同実施例に係る演算の処理手順を示す図。FIG. 2 is a diagram showing a processing procedure of calculation according to the embodiment.
【図３】同実施例に係る自家発電コストと買電コストの
関係を例示する図。FIG. 3 is a diagram exemplifying a relationship between private power generation cost and power purchase cost according to the embodiment.
【図４】同実施例に係る最適コスト曲線を例示する図。FIG. 4 is a diagram illustrating an optimum cost curve according to the embodiment.
【図５】同実施例に係る最適コスト曲線を得る演算内容
を示すフローチャート。FIG. 5 is a flowchart showing the contents of calculation for obtaining the optimum cost curve according to the embodiment.
11…キーボード（ＫＢ）、12…装置本体、13…ハードデ
ィスク装置（ＨＤＤ）、14…ＣＲＴ、15…プリンタ（Ｐ
ＲＴ）。11 ... Keyboard (KB), 12 ... Device main body, 13 ... Hard disk device (HDD), 14 ... CRT, 15 ... Printer (P
RT).
Claims (1)
買電と自家発電との最適配分を示す最適コスト曲線を予
め記憶する記憶手段と、 必要となる電力量を入力する入力手段と、 この入力手段の内容に対応した買電と自家発電との最適
配分を上記最適コスト曲線を参照することで得る演算手
段と、 この演算手段で得た買電と自家発電の最適配分を出力す
る出力手段とを具備したことを特徴とする発電配分決定
装置。1. Storage means for storing in advance an optimum cost curve showing an optimum distribution of power purchase and private power generation with respect to total power consumption in consideration of cost, input means for inputting required power amount, and this input A calculation means for obtaining the optimum distribution of power purchase and private power generation corresponding to the contents of the means by referring to the above optimum cost curve, and an output means for outputting the optimum distribution of power purchase and private power generation obtained by this calculation means. A power generation distribution determining apparatus comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6022582A JPH07231569A (en) | 1994-02-21 | 1994-02-21 | Unit for determining distribution of generated power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6022582A JPH07231569A (en) | 1994-02-21 | 1994-02-21 | Unit for determining distribution of generated power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07231569A true JPH07231569A (en) | 1995-08-29 |
Family
ID=12086856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6022582A Withdrawn JPH07231569A (en) | 1994-02-21 | 1994-02-21 | Unit for determining distribution of generated power |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07231569A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH102593A (en) * | 1996-06-13 | 1998-01-06 | Toshiba Corp | Air-conditioning device |
| JP2000045869A (en) * | 1998-07-29 | 2000-02-15 | Hitachi Ltd | Energy supply system |
| JP2004336890A (en) * | 2003-05-08 | 2004-11-25 | Hitachi Ltd | Power purchase and sale support system |
| JP2005261123A (en) * | 2004-03-12 | 2005-09-22 | Tokyo Gas Co Ltd | Control method and control system of power system |
| JP2006166639A (en) * | 2004-12-08 | 2006-06-22 | Denso Corp | Power controller of electric system |
-
1994
- 1994-02-21 JP JP6022582A patent/JPH07231569A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH102593A (en) * | 1996-06-13 | 1998-01-06 | Toshiba Corp | Air-conditioning device |
| JP2000045869A (en) * | 1998-07-29 | 2000-02-15 | Hitachi Ltd | Energy supply system |
| JP2004336890A (en) * | 2003-05-08 | 2004-11-25 | Hitachi Ltd | Power purchase and sale support system |
| US7711655B2 (en) | 2003-05-08 | 2010-05-04 | Hitachi, Ltd. | Electric power trading support system |
| JP2005261123A (en) * | 2004-03-12 | 2005-09-22 | Tokyo Gas Co Ltd | Control method and control system of power system |
| JP2006166639A (en) * | 2004-12-08 | 2006-06-22 | Denso Corp | Power controller of electric system |
| JP4622496B2 (en) * | 2004-12-08 | 2011-02-02 | 株式会社デンソー | Electric power control device |
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