JPS593708U

JPS593708U - Phase-to-phase surge voltage detection device

Info

Publication number: JPS593708U
Application number: JP9766782U
Authority: JP
Inventors: 樋口　武光
Original assignee: 関西電力株式会社
Priority date: 1982-06-28
Filing date: 1982-06-28
Publication date: 1984-01-11
Also published as: JPH043524Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

゛第１図は、ガス絶縁開閉装置の気中ブツシレ・グ付近
を示す斜視図である。第２図は、この考案を構成する内
部母線電圧検出手段を示す概略図である。第３図は、こ
の考案を構成する減算手段を示すブロック図である。第
４図は、雷サージ電圧の波形を示す概略図である。第５
図は、内部母線電圧検出手段の他の実施例を示す概略図
である。第６図は、半導体センサ１７の付近を示す概略
図である。第７図は、第６図の電気的等価回路を示す。第８図は、内部母線電圧検出用の非接地の導体の他の実
施例を示す概略図である。第９図は、内部母線電圧検出
用の非接地の導体のさらに他の実施例を示す概略図であ
る。図において、６は内部母線、７は絶縁スペーサ、９．１
０は抵抗器、１１は電気／光信号変換器、１２は光ファ
イバ、１３は光／電気信号変換器、１５Ａ、　１５Ｂ、
　１５Ｃは演算増幅器、１７は半導体センサ、１８ａ、
１８ｂは光ファイバ、１９変換器、２１は絶縁スペーサ
、２２は円環導体、２４は電極である。1 is a perspective view showing the vicinity of the air pump leg of the gas insulated switchgear. FIG. 2 is a schematic diagram showing the internal bus voltage detection means constituting this invention. FIG. 3 is a block diagram showing the subtraction means constituting this invention. FIG. 4 is a schematic diagram showing the waveform of lightning surge voltage. Fifth
The figure is a schematic diagram showing another embodiment of the internal bus voltage detection means. FIG. 6 is a schematic diagram showing the vicinity of the semiconductor sensor 17. FIG. 7 shows an electrical equivalent circuit of FIG. 6. FIG. 8 is a schematic diagram showing another embodiment of an ungrounded conductor for internal bus voltage detection. FIG. 9 is a schematic diagram showing still another embodiment of an ungrounded conductor for internal bus voltage detection. In the figure, 6 is an internal bus bar, 7 is an insulating spacer, 9.1
0 is a resistor, 11 is an electrical/optical signal converter, 12 is an optical fiber, 13 is an optical/electrical signal converter, 15A, 15B,
15C is an operational amplifier, 17 is a semiconductor sensor, 18a,
18b is an optical fiber, 19 is a converter, 21 is an insulating spacer, 22 is a circular conductor, and 24 is an electrode.

Claims

[Scope of utility model registration request]

(1) An interphase surge voltage detection device used in a three-phase gas-insulated switchgear, comprising at least two internal bus voltage detection means for detecting the voltage of the internal bus of each phase of the gas-insulated switchgear, Each internal bus voltage detection means is connected to a non-grounded conductor disposed around the internal bus bar and to the non-grounded conductor, and detects voltage induced in the non-grounded conductor by the voltage of the internal bus bar. an optical signal generating means for detecting a voltage generated by the optical signal and converting it into an optical signal; an optical signal transmitting means connected to the optical signal generating means and transmitting the optical signal; and an optical signal transmitting means connected to the optical signal transmitting means. , an electrical signal generating means for converting the optical signal into an electrical signal,
, ' further comprising subtracting means connected to two of the internal bus voltage detecting means for subtracting the signals output from the respective internal bus voltage detecting means, thereby determining the difference between the phases of the internal bus. A phase-to-phase surge voltage detection device that detects phase-to-phase surge voltage by detecting the voltage between phases.

(2) The internal bus voltage detection means includes the first. The subtraction means includes second and third internal bus voltage detection means, and the subtraction means includes the first and third internal bus voltage detection means. comprising second and third subtracting means, the first subtracting means being connected to the first and second internal bus voltage detecting means, and the second subtracting means being connected to the second and second internal bus voltage detecting means; 3, and the third subtraction means is connected to the third and first internal bus voltage detection means.
The phase-to-phase surge voltage detection device according to claim 1, which is connected to the internal bus voltage detection means of the utility model.

(3) The optical signal generating means is connected between the ungrounded conductor and the ground, and is connected to voltage dividing means for dividing the voltage induced in the ungrounded conductor; The interphase surge voltage detection device according to claim 1 or 2, further comprising means for converting the voltage output from the voltage dividing means into an optical signal.

(4) Utility model registration, wherein the optical signal generating means is connected to the ungrounded conductor and includes means for converting a change in voltage induced in the ungrounded conductor into a change in the refractive index of light. An interphase surge voltage detection device according to claim 1 or 2.

(5) The gas-insulated switchgear is a metal container that houses the internal bus bar, and has a section of the metal container that is insulated from other parts for mounting a current transformer, and the non-grounded The phase-to-phase surge voltage detection device according to any one of claims 1 to 4, wherein the conductor is a metal container in the insulated section.

(6) The gas insulated switchgear has an insulating spacer for insulating the metal container housing the internal bus bar from other parts, and the ungrounded conductor is an electrode provided in the insulating spacer section. The first claim for utility model registration is
The phase-to-phase surge voltage detection device according to any one of items 1 to 4.