JP3217353B2 - Digital bus protection device - Google Patents
Digital bus protection deviceInfo
- Publication number
- JP3217353B2 JP3217353B2 JP31436290A JP31436290A JP3217353B2 JP 3217353 B2 JP3217353 B2 JP 3217353B2 JP 31436290 A JP31436290 A JP 31436290A JP 31436290 A JP31436290 A JP 31436290A JP 3217353 B2 JP3217353 B2 JP 3217353B2
- Authority
- JP
- Japan
- Prior art keywords
- bus
- protection device
- protection
- output
- split
- 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 - Lifetime
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- Emergency Protection Circuit Devices (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、電力系統を保護する保護リレーに係り特
に、複母線を差動原理で保護するディジタル形母線保護
装置に関する。Description: Object of the Invention (Field of Industrial Application) The present invention relates to a protection relay for protecting a power system, and more particularly, to a digital bus protection device for protecting a double bus on a differential principle.
(従来の技術) 電力系統の複母線を一括保護装置と分割保護装置とに
より選択保護を行なう母線保護装置におけるブリッジ中
の保護方式としては、従来分割保護装置の何れか一方の
みを第2の一括保護装置相当とし、前記一括保護装置と
ともに母線を保護する構成としていた。(Prior Art) As a protection method in a bridge in a bus protection device that selectively protects a multiple bus of an electric power system by a collective protection device and a split protection device, only one of the conventional split protection devices is used in a second batch protection device. The protection device is equivalent to the protection device, and the bus is protected together with the collective protection device.
(発明が解決しようとする課題) しかしながら、従来技術ではブリッジ中の処理とし
て、甲母線、乙母線で構成される複母線を一括保護装置
と、分割保護装置の何れか一方(例えば、甲側分割保護
装置)を第2の一括保護装置とし、複母線保護を行なっ
ている。ここで分割保護装置は断路器条件で保護範囲が
制御されるため一般に信頼性が低いという欠点があり、
万一甲側分割保護装置に不良があった場合、全母線がし
ゃ断できず大きな問題となる場合がある。(Problems to be Solved by the Invention) However, in the prior art, as a process during the bridge, a double bus composed of an instep bus and a second bus is either one of a collective protection device and a split protection device (for example, The protection device is a second batch protection device, and double bus protection is performed. Here, the split protection device has a disadvantage that generally the reliability is low because the protection range is controlled by the disconnection condition,
If there is a defect in the backside split protection device, all buses cannot be cut off, which may cause a serious problem.
よって本発明は複母線のブリッジ中の保護を確実に行
ない信頼性の高い母線保護継電装置を提供することを目
的としている。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a highly reliable bus protection relay device that reliably protects a double bus in a bridge.
(課題を解決するための手段) 本発明は、複母線を一括で事故を検出する第1の手段
(一括保護装置)と、各母線の事故を検出する第2,第3
の手段(各々の分割保護装置)と、各母線に接続されて
いる断路器条件に基づき両母線が接続された状態(ブリ
ッジ中)であることを検出する第4の手段とから構成さ
れ、第4の手段でブリッジ中を検出すると、第2,第3の
手段を一括で事故を検出する第1の手段相当の手段とす
るものである。(Means for Solving the Problems) The present invention provides a first means (collective protection device) for detecting an accident on multiple buses at once, and a second and third means for detecting an accident on each bus.
(Each of the divided protection devices), and fourth means for detecting that both buses are connected (during bridge) based on the disconnector condition connected to each bus, When the bridge is detected by the means (4), the second and third means are collectively equivalent to the first means for detecting an accident.
(作 用) 第1の手段と第2の手段から得られるしゃ断出力と、
第1の手段と第3の手段から得られるしゃ断出力との両
方でしゃ断器にしゃ断出力を送出できるため、信頼性の
高い母線保護装置が得られる。(Operation) The interruption output obtained from the first means and the second means,
Since the interruption output can be sent to the interrupter with both the interruption output obtained from the first means and the interruption output from the third means, a highly reliable bus protection device can be obtained.
(実施例) 以下図面を参照して実施例を説明する。(Example) Hereinafter, an example is described with reference to drawings.
第1図は本発明による母線保護装置の一実施例のシス
テムブロック構成図である。また、第2図は本装置を適
用する複母線の系統図である。第1図において、1は入
力変流器、2はサンプルホールド回路、3はマルチプレ
クサ、4はA/D変換器、5はマイクロプロセッサ等のデ
ィジタル演算装置で構成された保護演算装置、6は出力
回路であり、7は制御信号入力回路である。また、第2
図において、Bは保護対象の母線、Lは送電線、CTは変
流器、CBはしゃ断器、LSは断路器である。FIG. 1 is a system block diagram of an embodiment of a bus protection device according to the present invention. FIG. 2 is a system diagram of a double bus to which the present apparatus is applied. In FIG. 1, 1 is an input current transformer, 2 is a sample-and-hold circuit, 3 is a multiplexer, 4 is an A / D converter, 5 is a protection operation device composed of a digital operation device such as a microprocessor, and 6 is an output. Reference numeral 7 denotes a control signal input circuit. Also, the second
In the figure, B is a bus to be protected, L is a transmission line, CT is a current transformer, CB is a circuit breaker, and LS is a disconnector.
母線につながる送電線Lの電流Iに比例した電気量
I′が変流器CT及び入力変換器1を経てサンプルホール
ド回路2に供給される。この電気量I′はマルチプレク
サ3により順次選択され、A/D変換器4へ導入され、デ
ィジタル量iに変換される。An electric quantity I ′ proportional to the current I of the transmission line L connected to the bus is supplied to the sample and hold circuit 2 via the current transformer CT and the input converter 1. The electric quantity I 'is sequentially selected by the multiplexer 3, introduced into the A / D converter 4, and converted into a digital quantity i.
保護演算装置5は、ディジタル量iを用いて、一括保
護用の保護演算を行ない、母線の内部事故と判定すれば
出力を出力回路6へ送出する。The protection operation device 5 performs a protection operation for collective protection by using the digital quantity i, and sends an output to the output circuit 6 when it is determined that an internal accident has occurred in the bus.
さらに、保護演算装置5は、ディジタル量iと、制御
信号入力回路7からのLS条件とにより、当該母線に接続
された回線の電流で分割保護用の保護演算を行ない、該
当母線の内部事故と判定すると、出力を出力回路6へ送
出する。Further, the protection operation device 5 performs a protection operation for division protection using the current of the line connected to the bus in accordance with the digital quantity i and the LS condition from the control signal input circuit 7, and an internal accident of the corresponding bus and If it is determined, the output is sent to the output circuit 6.
出力回路6は、一括、分割各保護用出力とLS条件によ
り母線の選択しゃ断出力を送出する。The output circuit 6 sends out the selected and cut-off output of the bus in accordance with the LS condition and the output for each protection at once.
次に第3図に保護演算装置5の処理内容をフローチャ
ートで示す。Next, FIG. 3 is a flowchart showing the processing contents of the protection arithmetic unit 5.
ステップS1では、ディジタル値in(nは回線の番号を
示す)を読み込み、ステップS2では全てのinを用いて動
作量Idを演算し、ステップS3ではIdを用いて動作値Ioと
比較し動作判定を行なう。動作時はS4で出力を送出す
る。In step S1, the digital value in (n indicates the line number) is read, and in step S2, the operation amount Id is calculated using all the ins. In step S3, the operation value is compared with the operation value Io using Id to determine the operation. Perform During operation, output is sent in S4.
以上が一括保護用の演算である。 The above is the operation for collective protection.
次に分割保護用の演算を示す。 Next, calculation for division protection will be described.
ステップS5では断路器条件jn甲,jn乙を読み込む。こ
こで、jnが“1"であれば使用、“0"であれば不使用を示
すとする。In step S5, disconnector conditions jn A and jn B are read. Here, it is assumed that if jn is "1", it indicates use, and if "0", it indicates nonuse.
次にステップS6では、ブリッジ中か否かを判定する。 Next, in step S6, it is determined whether or not a bridge is being performed.
具体的には、甲母線に接続されていることを示す断路
器条件jn甲と乙母線に接続されていることを示す断路器
条件jn乙においてともに“1"である回転の有無で判定で
きる。Specifically, the determination can be made based on the presence or absence of the rotation that is both "1" in the disconnector condition jn indicating that the vehicle is connected to the instep bus and the disconnector condition jn that indicates that the vehicle is connected to the inversion bus.
即ち、ともに“1"である3回線が有るとブリッジ中と
判定し、ステップS7で全てのjn甲,jn乙を“1"とする。
ここで母線連絡部のCT入力を不要とする等の処理がある
が本主旨からはずれるので省略する。That is, when there are three lines that are both “1”, it is determined that the bridge is being bridged, and all the jn A and jn B are set to “1” in step S7.
Here, there is a process of making the CT input of the bus connecting portion unnecessary or the like.
先ず、ブリッジ中でない場合を説明する。 First, a case in which a bridge is not being performed will be described.
ステップS8では、甲母線側動作量Id甲を断路器条件jn
甲により、甲母線側に接続されている回線のディジタル
値を用いて演算する。In step S8, the instep bus side operation amount Id is determined by the disconnector condition jn.
The calculation is performed by Party A using the digital value of the line connected to the Party Bus side.
ステップS9ではステップS8と同様に乙母線側動作量Id
乙を断路器条件jn乙により、乙母線側に接続されている
回線のディジタル値を用いて演算する。In step S9, as in step S8, the operation amount Id
The operation is performed using the digital value of the line connected to the operation line under the disconnection condition jn.
ステップS10ではId甲を用いて甲側の母線に関して動
作判定を行ない、ステップS11で出力を送出する。In step S10, an operation determination is performed on the instep-side bus using Id Party A, and an output is transmitted in step S11.
ステップS12ではId乙を用いて乙側の母線に関して動
作判定を行ない、ステップS13で出力を送出する。In step S12, the operation is determined for the bus on the side B using Id B, and the output is transmitted in step S13.
以上が甲側、乙側の各々の分割保護用の演算である。 The above is the calculation for the division protection of the party A and the party B.
次に、ステップS6において、ブリッジ中の場合を説明
する。Next, a case in which a bridge is being performed in step S6 will be described.
ステップS7では甲側用断路器条件jn甲を全て“1"とす
る。即ち、全回線が甲側母線に接続されたものとする。In step S7, all the instep disconnector conditions jn A are set to “1”. That is, it is assumed that all the lines are connected to the back side bus.
また、乙側用断路器条件jn乙も全て“1"とし、乙側母
線へも全ての回線が接続されたものとする。In addition, it is assumed that all the disconnector conditions jn for the second party are all “1”, and all the circuits are connected to the second party bus.
但し図示していないが母線連絡部のCT入力は不要とし
ている。それ以降は、ステップS8の処理へ進みブリッジ
中でない場合と同様の処理となる。However, although not shown, the CT input of the bus connecting part is not required. Thereafter, the process proceeds to the process of step S8, and the same process as when the bridge is not being performed is performed.
但し、何れのLS条件も全て“1"であるため、甲側,乙
側何れも一括処理相当となる。However, since all of the LS conditions are “1”, both the instep side and the side B correspond to the batch processing.
このときの出力回路構成を第4図に示す。ここで21は
一括保護出力の接点、22は甲側分割保護出力、23は乙側
分割保護出力の各接点を示す。また、24は断路器条件で
あり、該当回線が甲側に接続されていれば閉じており、
25は乙側のとき閉じている。The output circuit configuration at this time is shown in FIG. Here, reference numeral 21 denotes a contact of the collective protection output, reference numeral 22 denotes each contact of the former side split protection output, and reference numeral 23 denotes each of the second party side protection output. 24 is a disconnector condition, which is closed if the corresponding line is connected to the instep side,
25 is closed when it is the second party.
従ってブリッジ中は一括及び甲側分割、乙側分割の動
作出力が得られるため両方のしゃ断条件を用いるので、
信頼性の高いしゃ断回路が構成できる。Therefore, during the bridge, both the splitting conditions are used because the operation output of the lump, the split of the former side and the split of the second party can be obtained.
A highly reliable shutoff circuit can be configured.
以上の説明では、一括保護用に全回線の電流を用いて
差電流を演算し、動作判定を行なう電流差動方式につい
て述べたが、本発明はこれに限定されるものではなく、
全回線の差電圧に応動する高インピーダンス差動方式で
あっても何ら問題ない。In the above description, the differential current is calculated using the currents of all the lines for collective protection, and the current differential method of determining the operation has been described. However, the present invention is not limited to this.
There is no problem even with a high-impedance differential system that responds to the differential voltage of all lines.
また、第3図の説明ではIdの大きさだけで動作判定を
しているが、これは一例であり、各回線電流のスカラー
和を演算し、これを抑制量として、動作判定式に参加さ
せても同様の効果が得られる。Also, in the description of FIG. 3, the operation is determined only by the magnitude of Id, but this is merely an example, and a scalar sum of each line current is calculated, and this is used as a suppression amount to participate in the operation determination formula. The same effect can be obtained.
以上説明したように本発明によれば、複母線を一括で
事故検出する第1の手段と、各母線の事故を検出する第
2,第3の手段と、ブリッジ中であることを検出する第4
の手段を備え、第4の手段の出力により、第2,第3の手
段の両方を一括で事故検出を行なう第1の手段相当とし
たので、しゃ断指令を第1と第2及び第1と第3の手段
の両方で送出でき、信頼性の高い母線保護継電装置も提
供できる。As described above, according to the present invention, the first means for detecting an accident on multiple buses at once and the second means for detecting an accident on each bus
2, a third means and a fourth means for detecting that a bridge is being performed
Means are provided, and both the second and third means are equivalent to the first means for detecting an accident at once by the output of the fourth means. It is possible to provide a highly reliable bus protection relay that can be transmitted by both of the third means.
第1図は本発明による母線保護装置の構成図、第2図は
複母線構成の系統図、第3図は本発明の保護演算処理の
フローチャート、第4図は本発明の出力シーケンスの構
成図である。 1……入力変換器、2……サンプルホールド回路 3……マルチプレクサ、4……A/D変換器 5……保護演算装置、6……出力回路 7……入力回路、21……一括保護出力条件 22……甲側分割保護出力条件 23……乙側分割保護出力条件 24,25……断路器条件FIG. 1 is a block diagram of a bus protection device according to the present invention, FIG. 2 is a system diagram of a double bus configuration, FIG. 3 is a flowchart of protection calculation processing of the present invention, and FIG. 4 is a configuration diagram of an output sequence of the present invention. It is. DESCRIPTION OF SYMBOLS 1 ... Input converter, 2 ... Sample hold circuit 3 ... Mux, 4 ... A / D converter 5 ... Protection arithmetic unit, 6 ... Output circuit 7 ... Input circuit, 21 ... Batch protection output Condition 22: Inverted split protection output condition 23: Invertible split protected output condition 24, 25: Disconnector condition
フロントページの続き (56)参考文献 特開 昭49−70157(JP,A) 特開 昭57−43523(JP,A) 特開 昭62−285628(JP,A) 特開 昭63−124718(JP,A) (58)調査した分野(Int.Cl.7,DB名) H02H 7/22 H02H 3/28 Continuation of the front page (56) References JP-A-49-70157 (JP, A) JP-A-57-43523 (JP, A) JP-A-62-285628 (JP, A) JP-A-63-124718 (JP) , A) (58) Field surveyed (Int. Cl. 7 , DB name) H02H 7/22 H02H 3/28
Claims (1)
判定を行なう一括保護装置および何れの母線の事故かを
判定する分割保護装置とにより、選択保護を行なうディ
ジタル形母線保護装置において、各母線に接続されてい
る断路器条件に基づき両母線が同時に接続された状態で
あることを検出する手段と、この手段の出力により前記
分割保護装置を各々を新たな一括保護装置とみなし、各
々が前記一括保護装置とともに母線保護を行なうことを
特徴とするディジタル形母線保護装置。1. A digital bus protection device for selectively protecting a double bus of an electric power system by a collective protection device for judging whether an accident has occurred inside or outside and a split protection device for judging which bus has an accident. Means for detecting that both buses are simultaneously connected based on the disconnector condition connected to each bus, and the output of this means regards each of the split protection devices as a new collective protection device, A digital bus protection device, each of which performs bus protection together with the collective protection device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31436290A JP3217353B2 (en) | 1990-11-21 | 1990-11-21 | Digital bus protection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31436290A JP3217353B2 (en) | 1990-11-21 | 1990-11-21 | Digital bus protection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04190626A JPH04190626A (en) | 1992-07-09 |
JP3217353B2 true JP3217353B2 (en) | 2001-10-09 |
Family
ID=18052423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31436290A Expired - Lifetime JP3217353B2 (en) | 1990-11-21 | 1990-11-21 | Digital bus protection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3217353B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6222711B1 (en) | 1998-04-21 | 2001-04-24 | Kabushiki Kaisha Toshiba | Bus-bar protection relay equipment |
-
1990
- 1990-11-21 JP JP31436290A patent/JP3217353B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04190626A (en) | 1992-07-09 |
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