JPS5812812B2 - Bosenden Ryuusokutei Souchi - Google Patents
Bosenden Ryuusokutei SouchiInfo
- Publication number
- JPS5812812B2 JPS5812812B2 JP50053584A JP5358475A JPS5812812B2 JP S5812812 B2 JPS5812812 B2 JP S5812812B2 JP 50053584 A JP50053584 A JP 50053584A JP 5358475 A JP5358475 A JP 5358475A JP S5812812 B2 JPS5812812 B2 JP S5812812B2
- Authority
- JP
- Japan
- Prior art keywords
- bus
- section
- active power
- reactive power
- power
- 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
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】
この発明は母線電流を厳密にかつ容易に測定できる装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that can accurately and easily measure bus current.
第1図は15BC方式母線系統を示す系統図で1は母線
、2は発電機、3は負荷、4は母線連絡線、5は発電機
2と母線連絡線4又は負荷3と母線連絡線4を接続する
接続線、6は母線連絡線用しゃ断器、7は断路器で母線
連絡線と母線との接続点は母線を複数個の母線区間に区
分し、また接続線と母線連絡線との接続点は母線連絡線
を3つの区間に区分する。Figure 1 is a system diagram showing a 15BC bus system, where 1 is the bus, 2 is the generator, 3 is the load, 4 is the bus connection line, and 5 is the generator 2 and bus connection line 4 or the load 3 and the bus connection line 4. 6 is a circuit breaker for the busbar connection line, 7 is a disconnector, and the connection point between the busbar connection line and the busbar divides the busbar into multiple busbar sections, and also the connection line and the busbar connection line. The connection points divide the bus line into three sections.
第1図において、系統運転中の負荷状態によっては特定
の母線区間のみが母線許容電流値を越える電流が流れ危
険む状態を招く恐れがあり、全ての母線区間の電流値を
監視する必要があった。In Figure 1, depending on the load condition during system operation, a current exceeding the allowable bus current value may flow in only a specific bus section, leading to a dangerous situation, so it is necessary to monitor the current value in all bus sections. Ta.
上記の目的の為全ての母線区間にCTを設置し直接電流
値を計測することはいたずらに母線構成要素を複雑にす
るだけでありコスト上も好ましくない。Installing CTs in all busbar sections to directly measure current values for the above purpose only unnecessarily complicates the busbar components and is not desirable in terms of cost.
従来有効電力潮流のみから電流値を演算計測する装置も
考えられているが、第1図に示すような超高圧母線系統
においては、電力潮流が運転中に大きく変動し従って力
率を一定値とした簡易測定法では正確な測定を期するこ
とが出来なかった。Conventionally, devices have been considered that calculate and measure the current value only from the active power flow, but in ultra-high voltage bus systems like the one shown in Figure 1, the power flow fluctuates greatly during operation, so it is difficult to maintain the power factor at a constant value. Accurate measurements could not be expected with the simple measurement method used.
この発明は上記の点を考慮し、各母線区間の全ての電流
を直接測ることなく各母線区間の電流を厳密に計測しよ
うとするものである。This invention takes the above points into consideration and attempts to accurately measure the current in each bus section without directly measuring all the currents in each bus section.
第2図はこの発明の一実施例を示しており、ここでは説
明のため単母線系統に適用している。FIG. 2 shows an embodiment of the present invention, which is applied to a single bus system for the sake of explanation.
なお二重母線系統等他の母線系統方式への適用の拡張も
全く容易に行なえる。Furthermore, the application can be easily extended to other bus system systems such as a double bus system.
第2図において8は各接続線に設置された計器用変流器
(CT)で9は母線に設置された計器用変圧器(PT)
である。In Figure 2, 8 is a potential current transformer (CT) installed on each connection line, and 9 is a potential transformer (PT) installed on the bus bar.
It is.
CT8,PT9いずれも通常母線系統には設置されてい
るものを利用出来る。Both CT8 and PT9 that are normally installed in the bus system can be used.
10及び11はPT9の出力と各接続線毎のCT8の出
力から測定される有効電力測定器及び無効電力屑定器、
12,13はそれぞれ有効電力演算装置と無効電力演算
装置、B1〜B5は母線と各接続線との接続点によって
区分された各母線区間、L1〜L6は発電機2と母線1
を接続する電源線又は負荷3と母線1を接続する負荷線
である。10 and 11 are active power measuring instruments and reactive power waste detectors that measure from the output of PT9 and the output of CT8 for each connection line;
12 and 13 are an active power calculation device and a reactive power calculation device, respectively, B1 to B5 are bus sections divided by connection points between the bus and each connection line, and L1 to L6 are generator 2 and bus 1.
This is a power line that connects the load 3 and the bus 1 or a load line that connects the load 3 and the bus 1.
14は有効電力演算装置12と無効電力演算装置13の
出力から電流値を計算する実効電流演算装置である。Reference numeral 14 denotes an effective current calculation device that calculates a current value from the outputs of the active power calculation device 12 and the reactive power calculation device 13.
以下の説明では母線での電力損失はないものとする。In the following explanation, it is assumed that there is no power loss in the bus bar.
今母線区間B2を流れる有効電力X2と無効電力Y2を
求めてみる。Let us now calculate the active power X2 and reactive power Y2 flowing through the bus section B2.
接続線L2と母線との接続点においてキルヒホッフの法
則により次の式が成立する。At the connection point between the connection line L2 and the bus bar, the following equation holds true according to Kirchhoff's law.
X2=X1−P2=P1−P2 ・・・・・・(1)
Y2=Y1−TQ2−Q1−Q2 ・・・・・・(2
)こゝにX1,Y1は母線区間B1の有効電力、無効電
力、P1,Q1は接続線L1の有効電力、無効電力P2
,Q2は接続線L2の有効電力、無効電力である。X2=X1-P2=P1-P2 (1)
Y2=Y1-TQ2-Q1-Q2 (2
) Here, X1, Y1 are the active power and reactive power of the bus section B1, and P1, Q1 are the active power and reactive power P2 of the connection line L1.
, Q2 are the active power and reactive power of the connection line L2.
次に母線に対し流入する有効電力、無効電力を正方向と
考え、(1)及び(2)式を一般化するとX 一 ΣP
J ・・・・・・(3)K−J−1
YK= ΣQJ ・・・・・・(4)J=
1
が得られる。Next, assuming that the active power and reactive power flowing into the bus bar are in the positive direction, and generalizing equations (1) and (2), X - ΣP
J ・・・・・・(3) K−J−1 YK= ΣQJ ・・・・・・(4) J=
1 is obtained.
PJ,QJは母線の端から数えて第j番目の接続線の有
効電力及び無効電力、XK,YKは第k番目の母線区間
の有効電力及び無効電力である。PJ and QJ are the active power and reactive power of the j-th connection line counting from the end of the bus, and XK and YK are the active power and reactive power of the k-th bus section.
(3)式及び(4)式は、「任意の母線区間の有効電力
、無効電力はその母線区間の一端に至るまでの全ての接
続線の有効電力、無効電力の代数和である」ことを意味
している。Equations (3) and (4) indicate that "the active power and reactive power of any bus section are the algebraic sum of the active power and reactive power of all connecting lines up to one end of that bus section." It means.
従って各母線区間の有効電力及び無効電力はそれらを直
接測定することなく各接続線の有効電力及び無効電力の
測定値を上記有効電力演算装置及び無効電力演算装置に
入力することにより演算測定することができる。Therefore, the active power and reactive power of each busbar section can be calculated and measured by inputting the measured values of the active power and reactive power of each connection line to the above-mentioned active power calculation device and reactive power calculation device, without directly measuring them. I can do it.
次に第2図において三相母線でかつ母線電圧がすべての
母線区間で等しいとすると、第k番目の母線区間の電流
IKは次の(5)式で与えられる。Next, in FIG. 2, if it is a three-phase bus and the bus voltage is equal in all bus sections, the current IK in the k-th bus section is given by the following equation (5).
こゝに、■は母線電圧である。Here, ■ is the bus voltage.
以上で各母線区間の電流値を求めることができる。With the above steps, the current value in each bus section can be determined.
この発明によれば各母線区間の有効電力潮流と無効電力
潮流から演算により電流値を算出している為、系統運転
中に母線潮流に変動が生じても常に正確な値を計測でき
る。According to this invention, since the current value is calculated by calculation from the active power flow and reactive power flow in each bus section, accurate values can always be measured even if fluctuations occur in the bus power flow during system operation.
従って電力系統のいかなる母線に対しても適用ができる
。Therefore, it can be applied to any bus in the power system.
特に母線潮流の変動が大きい超高圧系統への適用におい
て、この装置は最適である。This device is especially suitable for application to ultra-high pressure systems where busbar power flow fluctuates significantly.
上記の説明のようにこの発明では、各母線区間の有効電
力及び無効電力を各接続線の有効電力及び無効電力の代
数和に基づき算出するようにしたので、各母線区間にC
Tを設置して直接計測する必要がなく、母線構成を複雑
化することなく任意の母線区間の電流値を計測すること
ができる。As described above, in this invention, the active power and reactive power of each bus section are calculated based on the algebraic sum of the active power and reactive power of each connection line.
There is no need to install a T for direct measurement, and the current value in any busbar section can be measured without complicating the busbar configuration.
第1図は1. 5 C B方式母線系統を示す系統図、
第2図はこの発明の一実施例を示す系統図であり、図に
おいて、1は母線、2は発電機、3は負荷、4は母線連
絡線、5は接続線、6は母線連絡線用しゃ断器、7は断
路器、8は変流器(CT)、9は計器用変圧器(PT)
、10は有効電力測定器、11は無効電力測定器、12
は有効電力演算装置、13は無効電力演算装置、14は
実効電流演算装置、L1〜L6は接続線、B1〜B5は
母線区間を示す。
なお各図中同一符号は同一又は相当部分を示す。Figure 1 shows 1. 5 CB system diagram showing the bus system,
FIG. 2 is a system diagram showing an embodiment of the present invention. In the figure, 1 is a busbar, 2 is a generator, 3 is a load, 4 is a busbar connection line, 5 is a connection line, and 6 is for a busbar connection line. breaker, 7 is a disconnector, 8 is a current transformer (CT), 9 is a potential transformer (PT)
, 10 is an active power measuring device, 11 is a reactive power measuring device, 12
13 is an active power calculation device, 13 is a reactive power calculation device, 14 is an effective current calculation device, L1 to L6 are connection lines, and B1 to B5 are busbar sections. Note that the same reference numerals in each figure indicate the same or equivalent parts.
Claims (1)
線、母線と上記各接続線との接続点によって区分された
母線区間、上記各接続線を流れる有効電力潮流及び無効
電力潮流の大きさと方向を廁定する有効電力測定器及び
無効電力測定器、上記母線の一端の区間の有効電力とそ
の区間の他端の接続線の有効電力の代数和をとり、この
代数和と上記母線区間の次の母線区間の他端の接続線の
有効電力の代数和をとり、以下順次その次の母線区間の
他端の接続線の有効電力との代数和をとる有効電力演算
装置、上記母線の一端の区間の無効電力とその区間の他
端の接続線の無効電力の代数和をとり、この代数和と上
記母線区間の次の母線区間の他端の接続線の無効電力の
代数和をとり、以下順次その次の母線区間の他端の接続
線の無効電力との代数和をとる無効電力演算装置、上記
の有効電力演算装置及び無効電力演算装置の出力から電
流値の大きさを計算する実効電流演算装置を接え、所定
母線区間の電流値をその一端に至るまでの接続線の有効
電力の代数和及び無効電力の代数和に基づいて演算測定
するようにした母線電流測定装置。1. The magnitude and direction of the active power flow and reactive power flow flowing through the connection lines that connect the bus and the power source or the bus and the load, the bus sections divided by the connection points between the bus and each of the above connection lines, and each of the above connection lines. Use the active power measuring device and reactive power measuring device to determine the algebraic sum of the active power in the section at one end of the above bus line and the active power of the connecting line at the other end of that section, and calculate the algebraic sum and the next power of the above bus section. An active power calculation device that calculates the algebraic sum of the active power of the connecting line at the other end of the bus section, and then sequentially calculates the algebraic sum of the active power of the connecting line at the other end of the next bus section, the section at one end of the bus bar. Take the algebraic sum of the reactive power of and the reactive power of the connecting line at the other end of that section, then take the algebraic sum of this algebraic sum and the reactive power of the connecting line at the other end of the next bus section of the above bus section, and then sequentially. A reactive power calculation device that calculates the algebraic sum of the reactive power of the connecting line at the other end of the next bus section, and an effective current calculation device that calculates the magnitude of the current value from the outputs of the above-mentioned active power calculation device and reactive power calculation device. A bus bar current measuring device that calculates and measures a current value in a predetermined bus section based on an algebraic sum of active power and an algebraic sum of reactive power of a connecting line up to one end of the bus bar section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50053584A JPS5812812B2 (en) | 1975-05-02 | 1975-05-02 | Bosenden Ryuusokutei Souchi |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50053584A JPS5812812B2 (en) | 1975-05-02 | 1975-05-02 | Bosenden Ryuusokutei Souchi |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS51129642A JPS51129642A (en) | 1976-11-11 |
JPS5812812B2 true JPS5812812B2 (en) | 1983-03-10 |
Family
ID=12946887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50053584A Expired JPS5812812B2 (en) | 1975-05-02 | 1975-05-02 | Bosenden Ryuusokutei Souchi |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5812812B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59138710U (en) * | 1983-03-08 | 1984-09-17 | 株式会社ミツトヨ | Mounting device for displacement measuring device |
-
1975
- 1975-05-02 JP JP50053584A patent/JPS5812812B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59138710U (en) * | 1983-03-08 | 1984-09-17 | 株式会社ミツトヨ | Mounting device for displacement measuring device |
Also Published As
Publication number | Publication date |
---|---|
JPS51129642A (en) | 1976-11-11 |
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