JPH0815368B2 - Minimum transmission loss system calculation method - Google Patents
Minimum transmission loss system calculation methodInfo
- Publication number
- JPH0815368B2 JPH0815368B2 JP62093141A JP9314187A JPH0815368B2 JP H0815368 B2 JPH0815368 B2 JP H0815368B2 JP 62093141 A JP62093141 A JP 62093141A JP 9314187 A JP9314187 A JP 9314187A JP H0815368 B2 JPH0815368 B2 JP H0815368B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- line
- transmission line
- transmission loss
- load
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は送電線の送電損失を最小とする系統運用形態
を決定する計算方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a calculation method for determining a system operation mode that minimizes the transmission loss of a transmission line.
（従来の技術） 第２図は本発明を適用する送電線の例を示している。
第２図において、１は電源側変電所の母線を示す。２は
変電所或いは需用家をまとめて示したもので、その中に
は複数の変電所があり、これらの各変電所に対して２回
線送電線2a、2bにて各負荷電力Ni（ｉ＝１〜ｎ）の電力
を供給している。３は送電線２から分岐する２回線の分
岐線を通じて、電力を受電している変電所の母線を示し
ている。４はしゃ断器、断路器などからなる開閉器であ
り、この開閉器を開閉することにより、変電所として第
１回線2aから受電するか、第２回線2bから受電するか或
いは両回線から受電するかを決めることができる。(Prior Art) FIG. 2 shows an example of a power transmission line to which the present invention is applied.
In FIG. 2, reference numeral 1 denotes a busbar of the power source side substation. 2 shows the substations or users collectively, and there are a plurality of substations, and for each of these substations, the load power Ni (i = 1 to n). Reference numeral 3 denotes a busbar of a substation that receives electric power through a two-branch line that branches from the power transmission line 2. Reference numeral 4 is a switch composed of a circuit breaker, a disconnector, etc. By opening and closing this switch, the substation receives power from the first line 2a, the second line 2b, or both lines. You can decide
これらの変電所には、夫々所定の大きさを有する電力
負荷が接続されており、ｉ番目の変電所の負荷の大きさ
をNiで示す。A power load having a predetermined size is connected to each of these substations, and the load size of the i-th substation is indicated by Ni.
又、変電所の中には図ｎ−１番目の変電所のように、
唯一の回線で受電している変電所もある。In addition, some substations, like the substation n-1 in Figure n,
There are also substations that receive electricity only via a single line.
このような変電所は、第１回線から受電するか、第２
回線から受電するかを選択することは出来ない。２回線
送電線２には電気抵抗５が存在する。この電気抵抗の大
きさは、送電線の太さ、材質、長さなどにより決まるも
のであり、送電線の分岐点から分岐点の間（以下ブラン
チと呼ぶ）毎に決まる値である。ブランチｊの抵抗値を
Ri（ｊ＝１〜ｍ）とする。Such substations receive electricity from the first line or the second line.
It is not possible to select whether to receive power from the line. An electric resistance 5 exists in the two-line power transmission line 2. The magnitude of this electric resistance is determined by the thickness, material, length, etc. of the power transmission line, and is a value determined at each branch point (hereinafter referred to as a branch) of the power transmission line. The resistance of branch j
Ri (j = 1 to m).
抵抗値Rjの大きさは、送電線ブランチ毎にある定まっ
た値を持ち、又、変電所の負荷値Niの大きさは、その時
々に応じて様々に変化する。The magnitude of the resistance value Rj has a certain value for each transmission line branch, and the magnitude of the load value Ni of the substation changes variously depending on the time.
このような構成の送電線と変電所群において、ある変
電所ｉの負荷Niを第１回線から受電するか、第２回線か
ら受電するかにより、送電線全体に発生する送電損失が
変化する。In the transmission line and the substation group having such a configuration, the transmission loss generated in the entire transmission line changes depending on whether the load Ni of a certain substation i is received from the first line or the second line.
本発明は各変電所を夫々どの回線から受電した時に、
送電線全体としての送電損失を最小とすることができる
か、その受電形態系統構成を求める送電損失最小系統計
算方式に関するものである。The present invention, when each substation receives power from each line,
The present invention relates to a minimum transmission loss system calculation method for determining the transmission loss of the entire transmission line or determining the power receiving mode system configuration.
従来、この種の系統運用形態の計算方式には、第３図
に示すものがあった。図において、31は初期系統を与え
るブロックであり、32はDCフロー法により系統の各ブラ
ンチの潮流値を算出する潮流計算を行なうブロックであ
り、33は32の結果を用いて、送電損失の合計値を算出
し、記憶されている送電損失の最小値と比較し、その結
果、新たに算出した送電損失の合計値が記憶されている
送電損失の最小値より小さい場合には、送電損失の最小
値を新たに算出した送電損失の合計値で置換えると共
に、送電損失の最小値を与えた系統形態を記憶するブロ
ックであり、34はｎ個の負荷の全てについて第１回線か
ら受電するか第２回線から受電するか、存在する全ての
系統形態について、送電損失計算及び最小値比較を終っ
たかを判断するブロックであり、終っていれば処理を終
了し、未計算の系統形態があればブロック35へ進む。Conventionally, there has been a calculation method of this type of system operation mode as shown in FIG. In the figure, 31 is a block that gives the initial grid, 32 is a block that performs power flow calculation to calculate the power flow value of each branch of the system by the DC flow method, and 33 is the total of transmission loss using the result of 32. Calculate the value and compare it with the stored minimum transmission loss.If the result is that the newly calculated total transmission loss is less than the stored minimum transmission loss, the minimum transmission loss is calculated. This is a block that replaces the value with the newly calculated total value of the transmission loss and stores the system configuration in which the minimum value of the transmission loss is given. 34 is a block for receiving power from the first line for all n loads. It is a block to judge whether power is received from two lines or whether transmission loss calculation and minimum value comparison have been completed for all existing system configurations. If completed, the process is terminated, and if there is an uncalculated system configuration, it is blocked. Go to 35 .
35は系統形態を変更し、送電損失を計算していない新
たな系統形態を作成するブロックである。Reference numeral 35 is a block that changes the system configuration and creates a new system configuration for which transmission loss has not been calculated.
（発明が解決しようとする問題点） 前記従来の方式では、例えば２回線送電線から受電す
る変電所がｎ個所存在する場合、2n回の系統形態の全て
に対して、潮流計算を行ない、送電損失を求める必要が
ある。従って、演算量が大きくなる欠点があった。(Problems to be Solved by the Invention) In the above-mentioned conventional method, for example, when there are n substations that receive power from a two-line transmission line, power flow calculation is performed for all 2 n system configurations, It is necessary to calculate the transmission loss. Therefore, there is a drawback that the amount of calculation becomes large.
本発明は上記のような従来方式の持つ欠点を除去する
ためになされたものであり、演算量を大幅に少なくし、
高速計算の可能な送電損失最小系統計算方式を提供する
ことを目的としている。The present invention has been made to eliminate the drawbacks of the conventional method as described above, and significantly reduces the calculation amount,
The purpose is to provide a system for calculating the minimum transmission loss system that enables high-speed calculation.
［発明の構成］ （問題点を解決するための手段） ２回線送電線から給電を受ける複数電気所のうちで、
受電線の切替選択が不可能な電気所に所定の負荷値を与
え他の切替選択可能な電気所の負荷値を零として求めた
送電線各部分の潮流値と、受電線の切替選択可能な電気
所のうちの１個所に所定の負荷値を与え他の全ての電気
所の負荷値を零とすることにより、各電気所の受電回線
を切替選択しながら求めた送電線各部分の潮流値とを加
算して、所定の受電形態にて受電する場合の送電線各部
分の潮流値を求め、この潮流値を用いて送電損失最小の
系統構成を決定するよう構成した。[Structure of the Invention] (Means for Solving Problems) Among a plurality of electric stations receiving power from a two-line power transmission line,
The power flow value of each part of the transmission line obtained by giving a predetermined load value to the power station where switching selection of the receiving wire is not possible and setting the load value of other power stations that can be switched to zero and switching selection of the receiving wire are selectable By applying a predetermined load value to one of the power stations and setting the load values of all other power stations to zero, the power flow value of each part of the transmission line obtained by switching and selecting the power receiving circuit of each power station. Is added to obtain the power flow value of each part of the power transmission line when power is received in a predetermined power reception mode, and the power flow value is used to determine the system configuration with the minimum power transmission loss.
（作用） ｎ個の電気所の中で第１回線から受電するか、第２回
線から受電するか切替選択不可能な電気所にのみ所定の
負荷値を与え、他の切替選択可能な電気所の負荷値は全
て零に設定し、潮流計算を行ない、送電線各ブランチの
潮流値を求める。(Function) Whether to receive power from the first line or receive power from the second line among the n electric stations, give a predetermined load value only to an electric station that cannot be selected for switching, and another electric station that can be switched for switching Set the load values of all to zero, calculate the power flow, and obtain the power flow value of each branch of the transmission line.
次に、切替選択可能な電気所の一つに注目し、これの
みに所定の負荷値を与え、他の（ｎ−１）個所の電気所
の負荷値は全て零に設定し、ｉ番目の電気所について第
１回線から受電した場合と、第２回線から受電した場合
について潮流計算を行なう。Next, paying attention to one of the switchable and selectable electric stations, a predetermined load value is given only to this, and the load values of the other (n-1) electric stations are all set to zero. The power flow is calculated for the case where the electric power is received from the first line and the case where the electric power is received from the second line.
このようにして、第１番目の電気所から第ｎ番目の電
気所まで切替選択可能な電気所数ｎ′に関して２×ｎ′
回の潮流計算を行ない、夫々の系統形態における送電線
ブランチの潮流値を求める。In this way, the number of electric stations n ′ that can be switched from the first electric station to the nth electric station is 2 × n ′.
The power flow is calculated once, and the power flow value of the transmission line branch in each system configuration is calculated.
この（２×ｎ′＋１）回の潮流計算から求めた各ブラ
ンチの潮流値を加算することにより、各電気所が第１回
線或いは第２回線から受電した場合の系統形態における
送電線各ブランチの潮流値を求めることができ、これら
の潮流値から送電損失最小の系統構成を決定する。By adding the power flow value of each branch obtained from the power flow calculation of (2 × n ′ + 1) times, the power line of each branch in the system configuration when each power station receives power from the first line or the second line The power flow value can be obtained, and the system configuration with the minimum transmission loss is determined from these power flow values.
（実施例） 以下図面を参照して実施例を説明する。ここで計算対
象は第２図とし、警報の処理フローは第１図である。先
ず考え方から説明する。(Examples) Examples will be described below with reference to the drawings. Here, the calculation target is FIG. 2, and the alarm processing flow is FIG. First, the concept will be described.
第２図において、ｎ個の負荷の中で第１回線から受電
するか、第２回線から受電するか切替選択不可能な負荷
にのみ所定の負荷値を与え、他の切替選択可能な負荷の
負荷値は全て零に設定し、潮流計算を行ない、送電線各
ブランチの潮流値を求める。In FIG. 2, whether to receive power from the first line or receive power from the second line among the n loads, a predetermined load value is given only to a load that cannot be switched, and another load that can be switched is selected. All load values are set to zero, power flow is calculated, and the power flow value of each branch of the transmission line is calculated.
次に、切替選択可能な負荷の一つに注目し、これのみ
に所定の負荷値を与え、他の（ｎ−１）個所の負荷の負
荷値は全て零に設定し、ｉ番目の負荷について第１回線
から受電した場合と、第２回線から受電した場合につい
て潮流計算を行なう。Next, paying attention to one of the loads that can be selected and switched, a predetermined load value is given only to this, and the load values of the other (n-1) points are all set to zero. Power flow is calculated for the case where the power is received from the first line and the case where the power is received from the second line.
このようにして、第１番目の負荷から第ｎ番目の負荷
まで切替選択可能な負荷数ｎ′に関して２×ｎ′回の潮
流計算を行ない、夫々の系統形態における送電線ブラン
チの潮流値を求める。In this way, the power flow calculation is performed 2 × n ′ times for the load number n ′ that can be switched and selected from the first load to the nth load, and the power flow value of the transmission line branch in each system configuration is obtained. .
上記（２×ｎ′＋１）回の潮流計算から求めた各ブラ
ンチの潮流値を加算することにより、各負荷が第１回線
或いは第２回線から受電した場合の系統形態における送
電線各ブランチの潮流値を求めることが出来る。By adding the power flow value of each branch obtained from the above (2 × n ′ + 1) power flow calculation, the power flow of each branch of the transmission line in the system configuration when each load receives power from the first line or the second line The value can be calculated.
この加減算の演算量は、送電線全体の潮流計算を行な
うのに比べて桁違いに少ないので、全体としては従来方
式の2n′回の潮流計算を行なっていたものを略（2n′＋
１）の潮流計算全ての負荷が切替選択可能の場合、ｎ′
＝ｎの演算量で済ませることが出来る。Since the amount of addition and subtraction calculation is orders of magnitude smaller than the power flow calculation for the entire transmission line, the overall calculation of 2 n ′ power flow in the conventional method is omitted (2n ′ +
If all loads in 1) power flow calculation can be selected for switching, n '
It can be completed with the calculation amount of = n.
第１図に示す計算方式のフローを用い、第２図の対象
電力系統の例を参照して説明する。Using the flow of the calculation method shown in FIG. 1, description will be made with reference to the example of the target power system in FIG.
第１図において、11は初期系統状態を与えると共に、
第１回線から受電するか第２回線から受電するか選択出
来ない負荷による送電線各ブランチの潮流値を求めるブ
ロックである。In FIG. 1, 11 gives the initial system state,
This is a block for obtaining the power flow value of each branch of the transmission line due to the load that cannot be selected whether to receive power from the first line or receive power from the second line.
ここで負荷値を与える変電所は、第２図、ｎ−１番目
の変電所のように１回線受電であり、切替選択不可の変
電所及び第２図、３番目の変電所のように初期系統にお
いて、第１回線、第２回線の両開閉器が閉であり、両回
線から受電する運用の変電所である。Here, the substation that gives the load value is one-line power receiving like the n-1th substation in Fig. 2, and the substation that cannot be selected for switching and the initial substation like the second and third substations in Figs. In the system, both switches of the first line and the second line are closed, and it is an operational substation that receives power from both lines.
これらの切替選択不可の変電所にのみ所定の負荷値を
与え、その他の切替選択可の変電所の負荷値を全て零と
設定し、与えられた初期系統の接続状態で電源変電所の
母線をスイングノードとして潮流計算を実行する。この
計算によって算出されたブランチｊの潮流値をPj0とお
く。A predetermined load value is given only to these substations that cannot be selected for switching, and the load values of other substations that can be selected for switching are set to all zero, and the busbars of the power substation are connected in the given initial grid connection state. Perform power flow calculation as a swing node. Let the power flow value of branch j calculated by this calculation be P j0 .
次に、第１図において、12は切替選択可能変電所を第
１回線から受電した場合の送電線各ブランチの潮流値を
求めるブロックである。このブロックでは、切替可能変
電所の任意の１個所（ｉ番目）について、当該変電所の
負荷値のみを所定の値Niとし、他の全ての変電所の負荷
値を零として第１回線から受電するものとして、電源変
電所の母線をスイングノードとして、潮流計算を実行す
る。この計算によって算出されたブランチｊの潮流値を
Pij1と置く。Next, in FIG. 1, reference numeral 12 is a block for obtaining the power flow value of each branch of the power transmission line when the switchable substation is received from the first line. In this block, for any one (i-th) switchable substation, only the load value of the substation is set to a predetermined value Ni, and the load values of all other substations are set to zero, and the power is received from the first line. To do so, the power flow is calculated using the bus of the power substation as a swing node. The power flow value of branch j calculated by this calculation
Put it as P ij1 .
次に、第１図13は切替選択可能変電所を第２回線から
受電した場合の各ブランチの潮流値を求めるブロックで
ある。このブロックでは、12と同様の計算をｉ番目の変
電所について、第２回線から受電したものとして実行す
る。この計算によって算出されたブランチｊの潮流値を
Pij2とおく。Next, FIG. 1 and FIG. 13 are blocks for obtaining the power flow value of each branch when the switchable substation is received from the second line. In this block, the same calculation as that of 12 is executed assuming that the i-th substation receives power from the second line. The power flow value of branch j calculated by this calculation
Let's call it P ij2 .
次に、第１図14は、全ての切替選択可能を変電所につ
いて、12、13のブロックを実行したかどうか判定するブ
ロックである。全ての変電所について計算実行した場合
は15へ、実行未済の場合は12へ戻る。Next, FIG. 1 and FIG. 14 are blocks for determining whether or not blocks 12 and 13 have been executed for all switching selectable substations. If calculation has been executed for all substations, return to 15, and if not, return to 12.
以上、11、12、13、14のブロックにより、切替選択可
能な変電所を任意の回線から受電するように切替えた系
統形態において、送電線ブランチｊに流れる潮流値は、
Pj0、Pij1、Pij2を用いて第１式により計算できる。As described above, in the system configuration in which the switchable substation is switched to receive power from an arbitrary line by the blocks of 11, 12, 13, and 14, the power flow value flowing through the transmission line branch j is
It can be calculated by the first equation using P j0 , P ij1 , and P ij2 .
送電線ブランチｊの潮流値のPjは である。The power flow value Pj of the transmission line branch j is Is.
次に、第１図15は、前記Pj0、Pij1、Pij2を用いて初
期系統における送電線内の全送電損失を計算するブロッ
クである。ブランチｊの抵抗値をPjとすると、ブランチ
ｊに発生する送電損失Ljは、次式で与えられる。Next, FIG. 1 is a block for calculating the total transmission loss in the transmission line in the initial system using P j0 , P ij1 and P ij2 . If the resistance value of the branch j is Pj, the transmission loss Lj generated in the branch j is given by the following equation.
Lj＝Rj×Pj2 …（２） 従って、送電線内全ブランチで発生する送電損失Ｌ
は、次式で与えられる。Lj = Rj × Pj 2 (2) Therefore, the transmission loss L that occurs in all branches in the transmission line
Is given by the following equation.
このＬをとりあえず、送電損失最小値として記憶す
る。 For the time being, this L is stored as the minimum value of power transmission loss.
次に、第１図16は、15のブロックで計算した初期系統
状態から、切替選択可能な変電所の受電回線を１個所切
替えて、送電線内全ブランチで発生する送電損失を計算
するブロックである。Next, FIG. 1 is a block for calculating the transmission loss generated in all the branches in the transmission line by switching one power receiving line of the switchable substation from the initial grid state calculated in the block of 15 is there.
ブランチｊの潮流値は、前回の計算値を用いて次の式
で算出できる。The power flow value of the branch j can be calculated by the following formula using the previously calculated value.
（４）式における−Pij1＋Pij2は受電回線を切替えた
ことに対応する送電損失の変化分を前回計算潮流値に加
減算することを示している。 −P ij1 + P ij2 in the equation (4) indicates that the change amount of the transmission loss corresponding to the switching of the power receiving line is added to or subtracted from the previously calculated power flow value.
（４）によるブランチｊの潮流値を（２）式、（３）
式に代入し、１変電所の受電回線を切替えた状態での送
電線内全ブランチで発生する送電損失が計算できる。The power flow value of the branch j according to (4) is expressed by equations (2) and (3).
By substituting into the formula, the transmission loss that occurs in all branches in the transmission line when the receiving line of one substation is switched can be calculated.
次に、第１図17は、前回計算した送電線内全ブランチ
で発生する送電損失と、今回計算した送電損失とを比較
するブロックである。比較の結果、今回の計算値が小さ
い場合は、これを最小値として記憶すると共に、この状
態で各変電所の受電回線番号を記憶する。Next, FIG. 1 and FIG. 17 are blocks for comparing the transmission loss generated in all branches in the transmission line calculated last time with the transmission loss calculated this time. As a result of the comparison, when the calculated value this time is small, this value is stored as the minimum value, and the power receiving line number of each substation is stored in this state.
次に、第１図18は、受電回線を切替選択可能な全ての
変電所について処理を終了したか否かを判定するブロッ
クである。Next, FIG. 1 and FIG. 18 are blocks for determining whether or not the processing has been completed for all substations in which the receiving lines can be switched and selected.
未だ全ての系統形態について処理終了していない場合
は、16のブロックへ戻り、新たに１個所の変電所の受電
回線を切替えて計算を行なう。If the processing has not been completed for all system configurations, the process returns to block 16 to newly perform calculation by switching the power receiving line of one substation.
全ての系統形態について処理完了の場合は、計算を終
了する。When the processing has been completed for all system configurations, the calculation ends.
上記実施例で説明した通り、本発明による送電損失最
小系統計算方式では、切替選択可能な変電所がｎ′個所
存在した場合、第１図フローチャートの12、13、14のブ
ロックをｎ′回繰返すことになる。As described in the above embodiment, in the minimum transmission loss system calculation method according to the present invention, when there are n'switchable substations, the blocks 12, 13, and 14 of the flowchart of FIG. 1 are repeated n'times. It will be.
従って、（2n′＋１）回潮流計算を実行すればよく、
従来の方式として説明した2n′回と比較して大幅に少な
い演算量で済む。Therefore, it is sufficient to execute the (2n '+ 1) times power flow calculation,
Compared with the 2 n ′ times described as the conventional method, a significantly smaller amount of calculation is required.
なお、16、17のブロックは、2n′回繰返すことになる
が、これは簡単な加減算であり、本方式の実用性を損う
ものではない。It should be noted that blocks 16 and 17 are repeated 2 n ′ times, but this is a simple addition and subtraction and does not impair the practicability of this system.
前述の説明では、２回線送電線から受電する２回線引
込みの変電所の場合を例として説明したが、本発明の方
式は多回線送電線或いは多回線引込みの変電所に関して
も適用できる。In the above description, the case of a two-line lead-in substation that receives power from a two-line power feed line has been described as an example, but the method of the present invention can also be applied to a multi-line power feed line or a multi-line lead-in substation.
更に、対象送電線の形態としても、本線に分岐のある
複雑な構成の送電線にも適用できる。Further, the form of the target power transmission line can be applied to a power transmission line having a complicated configuration in which the main line has a branch.
又、前述の例では、送電損失最小の系統構成を１構成
求める例として説明したが、送電損失の少ない系統構成
を少ない方から複数構成求めることもできる。このこと
は求められた損失最小の構成が運用上の理由などで採用
できない場合に、次善の系統構成を求める上で有効であ
る。Further, in the above example, the system configuration with the minimum transmission loss was described as an example, but a plurality of system configurations with less transmission loss can be determined from the smaller system configuration. This is effective in obtaining a suboptimal system configuration when the required minimum loss configuration cannot be adopted due to operational reasons.
［発明の効果］ 以上説明したように、本発明によれば複雑で多数の配
電用変電所、需用家などへ電力を供給する送電線におい
て、送電損失最小の系統構成を少ない演算量で求めるこ
とが出来る。[Effects of the Invention] As described above, according to the present invention, in a complicated transmission line for supplying electric power to a large number of distribution substations, consumers, etc., a system configuration with minimum transmission loss is obtained with a small amount of calculation. You can
第１図は本発明の処理内容を示すフローチャート、第２
図は本発明の処理内容を説明するための対象電力系統送
電線の例図、第３図は従来方式例の処理内容を示すフロ
ーチャートである。 １……電源側変電所の母線、２……２回線送電線 ３……受電側変電所の母線、４……開閉器 ５……抵抗FIG. 1 is a flowchart showing the processing contents of the present invention, and FIG.
FIG. 3 is an example diagram of a target power system transmission line for explaining the processing contents of the present invention, and FIG. 3 is a flowchart showing the processing contents of the conventional system example. 1 …… Bus of power source side substation, 2 …… 2 lines transmission line 3 …… Bus of receiving side substation, 4 …… Switch 5 …… Resistance
Claims (1)
抗値とそこを流れる潮流値の２乗の積の総和として近似
的に求め、当該送電線と負荷変電所、需用家の各種接続
状態における送電損失の大きさを比較し、送電損失最小
の負荷変電所、需用家の受電形態を求める送電損失最小
系統計算方式において、受電線の切替選択が不可能な電
気所に所定の負荷値を与え他の切替選択可能な電気所の
負荷値を零として求めた送電線各部分の潮流値と、受電
線の切替選択可能な電気所のうちの１個所に所定の負荷
値を与え他の全ての電気所の負荷値を零とすることによ
り、各電気所の受電回線を切替選択しながら求めた送電
線各部分の潮流値とを加算して、所定の受電形態にて受
電する場合の送電線各部分の潮流値を求め、この潮流値
を用いて送電損失最小の系統構成を決定することを特徴
とする送電損失最小系統計算方式。1. A transmission loss generated in a transmission line is approximately calculated as a sum of products of resistance of each transmission line and a square of a power flow value flowing therethrough, and the transmission line, the load substation, and the consumer In the load transmission substation with the minimum transmission loss and the minimum transmission loss system calculation method that seeks the power receiving form of the consumer by comparing the magnitude of the transmission loss in various connection states The load flow value of the other power stations that can be selected is set to zero, and the power flow value of each part of the transmission line is calculated, and the specified load value is set at one of the power stations that can be switched of the receiving wire. By setting the load values of all other power stations to zero, add the power flow value of each part of the power transmission line obtained by switching and selecting the power receiving circuit of each power station, and receive power in the specified power receiving mode. If the power flow value of each part of the transmission line is calculated, the power flow loss is calculated using this power flow value. Transmission loss minimum grid computing system and determines the small of network configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62093141A JPH0815368B2 (en) | 1987-04-17 | 1987-04-17 | Minimum transmission loss system calculation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62093141A JPH0815368B2 (en) | 1987-04-17 | 1987-04-17 | Minimum transmission loss system calculation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63262031A JPS63262031A (en) | 1988-10-28 |
| JPH0815368B2 true JPH0815368B2 (en) | 1996-02-14 |
Family
ID=14074246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62093141A Expired - Fee Related JPH0815368B2 (en) | 1987-04-17 | 1987-04-17 | Minimum transmission loss system calculation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0815368B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2644371B2 (en) * | 1990-11-30 | 1997-08-25 | 株式会社東芝 | Power system controller |
-
1987
- 1987-04-17 JP JP62093141A patent/JPH0815368B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63262031A (en) | 1988-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ezzeddine et al. | A novel method for optimal coordination of directional overcurrent relays considering their available discrete settings and several operation characteristics | |
| Aoki et al. | Normal state optimal load allocation in distribution systems | |
| Goswami et al. | A new algorithm for the reconfiguration of distribution feeders for loss minimization | |
| US6411865B1 (en) | System for protection zone selection in microprocessor-based relays in an electric power system | |
| Gwon et al. | Mitigation of voltage unbalance by using static load transfer switch in bipolar low voltage DC distribution system | |
| Chang | Locating shunt capacitors on primary feeder for voltage control and loss reduction | |
| UA43410C2 (en) | Three-phase system for uniform distribution of electric load at three-phase network of electric power distribution | |
| NZ335928A (en) | Evenly distributing an electrical load across an n-phase power distribution network | |
| Fernandez et al. | A novel approach using a FIRANN for fault detection and direction estimation for high-voltage transmission lines | |
| Ruben et al. | Meshing radial networks at 11kV | |
| CN105633985A (en) | Intelligent balance adjusting method for three-phase load unbalance | |
| Ukil et al. | Feeder load balancing using fuzzy logic and combinatorial optimization-based implementation | |
| JPH0815368B2 (en) | Minimum transmission loss system calculation method | |
| CN220190480U (en) | State switching device of energy storage inverter | |
| JPS5825013B2 (en) | Digital Seigiyohoushiki | |
| Mansani et al. | Backward sweep technique based phase balancing algorithm for secondary distribution system | |
| Chen et al. | Criteria for interfeeder switching in distribution systems | |
| Liu et al. | Power flow analysis on simplified feeder modeling | |
| Chen | Complex short circuit MVA method for power system studies | |
| US2786151A (en) | Power distribution apparatus | |
| JP2644371B2 (en) | Power system controller | |
| McCall et al. | Defining a distribution system for computer-controlled distribution automation | |
| El Hassan et al. | Implementation and Testing of a Practical Product to Balance Single-Phase Loads in a Three-Phase System at the Distribution and Unit Levels | |
| Liang et al. | Research on Optimal Configuration Method of Two-stage Protection for Distribution Lines Based on Distribution Information of Distribution Transformers | |
| Jongepier et al. | Adaptive distance protection of a double-circuit line using artificial neural nets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |