JPS6355294B2 - - Google Patents
Info
- Publication number
- JPS6355294B2 JPS6355294B2 JP57162318A JP16231882A JPS6355294B2 JP S6355294 B2 JPS6355294 B2 JP S6355294B2 JP 57162318 A JP57162318 A JP 57162318A JP 16231882 A JP16231882 A JP 16231882A JP S6355294 B2 JPS6355294 B2 JP S6355294B2
- Authority
- JP
- Japan
- Prior art keywords
- generator
- frequency
- converter
- power transmission
- starting
- 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
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 230000007257 malfunction Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Direct Current Feeding And Distribution (AREA)
Description
【発明の詳細な説明】
本発明は、直流送電システムの起動方式に係
り、特に、発電機の出力を全て、直流送電で送る
所謂直流単独送電システムに好適な起動方式に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting method for a DC power transmission system, and particularly to a starting method suitable for a so-called direct current power transmission system in which all output from a generator is transmitted by direct current transmission.
送電側、受電側の各々に交流系統を持つ一般の
直流送電システムでは、直流系の起動タイミング
は、特別な場合を除いて特に問題とはならないが
直流単独送電における初期の起動、即ち、発電機
出力零の状態から立ち上げる場合には、発電機出
力上昇とタイミングを合わせて直流系の起動をす
る必要がある。 In a general DC power transmission system that has an AC system on each of the power transmission side and the power reception side, the startup timing of the DC system is not a particular problem except in special cases, When starting up from zero output, it is necessary to start up the DC system at the same time as the generator output increases.
タイミングが遅れると、発電機タービンが加速
され、又タイミングが早すぎると、発電機出力が
足らないので、周波数低下、サイリスタバルブの
電流断続等の問題が発生する。 If the timing is delayed, the generator turbine will be accelerated, and if the timing is too early, the generator output will be insufficient, resulting in problems such as frequency reduction and intermittent current in the thyristor valve.
本発明の目的は、前記の問題点を解決し、直流
単独送電システムの初期起動に於て、発電機の出
力上昇とタイミングを合わせる直流系の起動方式
を提供する事にある。 SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a DC system startup method that matches the timing with the output rise of the generator during the initial startup of a DC independent power transmission system.
係る直流系の起動タイミングは、発電機の機械
入力（蒸気）が、直流系の最小変換電力に立ち上
がつた時点にするのが好ましい。本発明ではこの
タイミングを、発電機出力周波数の上昇から得
る。発電機タービンの時定数は、６秒〜８秒であ
るのに対し、直流系の起動時定数は、主回路定数
あるいは起動方式にもよるが、約500msec程度以
内である。従つて、周波数の上昇を検出してから
直流系の起動を行なつても、タービンに対し、ス
トレスが掛かることはない。 It is preferable that the startup timing of the DC system is set at the time when the mechanical input (steam) of the generator rises to the minimum converted power of the DC system. In the present invention, this timing is obtained from the increase in generator output frequency. The time constant of a generator turbine is 6 seconds to 8 seconds, whereas the starting time constant of a DC system is within about 500 msec, depending on the main circuit constant or the starting method. Therefore, even if the DC system is started after detecting a rise in frequency, stress will not be applied to the turbine.
以下、本発明の一実施例を図により説明する。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
まず発電機１はしや断器開放して無負荷状態
（タービン風損および所内負荷）で運転し、ほぼ
定格速度となつた時点でしや断器２を投入して変
換器８に電圧を掛けた状態にしておく。次に、発
電機１の機械入力を、変換器の最小運転電力相当
に立ち上げる。この状態では、負荷がないのでタ
ービン速度が定格速度から幾分上昇する。この周
波数の上昇を電圧変成器３を入力源とする周波数
上昇検出器４により検出する。そして比較器５に
より、この周波数上昇があらかじめ与えられたあ
る値よりも大きくなつた事を検出し、その信号
を、制御装置６に与える。制御装置６は、従来公
知の変換器の起動方式で、交直変換器８を立ち上
げる。一旦立ち上げた後は、周波数一定制御等に
より、発電機の出力を協調の制御をすればよいの
だが、これは、起動方式とは直接には関係しない
ので説明を省略する。 First, the generator 1 is operated in a no-load condition (turbine windage and station load) with the breaker open, and when the speed reaches almost the rated speed, the breaker 2 is turned on and the voltage is applied to the converter 8. Leave it hanging. Next, the mechanical input of the generator 1 is increased to a value equivalent to the minimum operating power of the converter. In this condition, the turbine speed increases somewhat from rated speed since there is no load. This frequency increase is detected by a frequency increase detector 4 which uses the voltage transformer 3 as an input source. Then, the comparator 5 detects that this frequency increase has become larger than a certain value given in advance, and provides the signal to the control device 6. The control device 6 starts up the AC/DC converter 8 using a conventionally known converter starting method. Once started up, the output of the generators may be controlled in a coordinated manner using constant frequency control or the like, but since this is not directly related to the starting method, the explanation will be omitted.
又、周波数上昇検出に当たつては、単に、定格
周波数からの上昇を見るのではなく、無負荷時の
周波数を記憶しておき、それとの偏差を見た方が
発電機側の設定の誤差等の影響がなく好ましい。
又、周波数検出系の誤動作時の、システム誤動作
を防ぐ為には、周波数上昇と、発電機出力立ち上
げ信号との論理積で、制御装置に起動指令を与え
る方法が有効である。またしや断器２の投入時の
電圧確立による周波数上昇と混同しないよう電圧
上昇を伴なわないこと等も条件の１つとすること
が望ましい。 In addition, when detecting a frequency rise, it is better to memorize the frequency at no load and check the deviation from it, rather than simply looking at the rise from the rated frequency, to detect errors in the settings on the generator side. This is preferable since it does not have such effects.
Furthermore, in order to prevent system malfunctions when the frequency detection system malfunctions, it is effective to issue a startup command to the control device by logically multiplying the frequency increase and the generator output startup signal. It is also desirable that one of the conditions be that there is no voltage increase so as not to be confused with the frequency increase due to voltage establishment when the disconnector 2 is turned on.
本発明によれば、起動タイミングを、発電機と
のインターフエースをとらずに、変換所端で検出
する事ができるので、システムの信頼度を上げる
ことができる。又、既設発電機の出力を直流単独
で送電するような場合にも、発電機側の改造等が
不要である。 According to the present invention, the start timing can be detected at the converter station without having to interface with the generator, thereby increasing the reliability of the system. Furthermore, even in the case where the output of an existing generator is transmitted solely as direct current, there is no need to modify the generator side.
図は、本発明の一実施例を示す。
１…発電機、９…直流送電線、２…しや断器、
１０…直流リアクトル、３…PT（又はPD）、１１
…交流送電線、４…周波数（上昇）検出器、５…
比較器、６…制御回路、７…変換用変圧器、８…
カイリスタバルブ。
The figure shows an embodiment of the invention. 1... Generator, 9... DC transmission line, 2... Shinya disconnector,
10...DC reactor, 3...PT (or PD), 11
...AC transmission line, 4...Frequency (increase) detector, 5...
Comparator, 6... Control circuit, 7... Conversion transformer, 8...
Kyrista valve.
Claims (1)
止状態の交流系統とをしや断器を介して接続する
直流送電システムの起動方式において、前記交流
系統を無負荷、所定周波数に起動してしや断器投
入したのちに、発電機の機械入力を変換器の最小
運転電力相当に立ち上げ、交直変換器側において
はその後周波数上昇したことをもつて交直変換器
にゲートパルス印加しこれを起動することを特徴
とする直流送電システムの起動方式。1. In a startup method for a DC power transmission system that connects a stopped AC/DC converter connected to a power transmission line and a stopped AC system via a disconnector, the AC system is started with no load and at a predetermined frequency. After turning on the breaker, the mechanical input of the generator is started up to the minimum operating power of the converter, and on the AC/DC converter side, when the frequency has increased, a gate pulse is applied to the AC/DC converter to control this. A starting method for a DC power transmission system characterized by starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57162318A JPS5953036A (en) | 1982-09-20 | 1982-09-20 | Starting system for dc transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57162318A JPS5953036A (en) | 1982-09-20 | 1982-09-20 | Starting system for dc transmitting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5953036A JPS5953036A (en) | 1984-03-27 |
| JPS6355294B2 true JPS6355294B2 (en) | 1988-11-01 |
Family
ID=15752244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57162318A Granted JPS5953036A (en) | 1982-09-20 | 1982-09-20 | Starting system for dc transmitting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0421275A (en) * | 1990-05-15 | 1992-01-24 | Victor Co Of Japan Ltd | Small sized video equipment and camera holder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58112475A (en) * | 1981-12-26 | 1983-07-04 | Tokyo Electric Power Co Inc:The | Starting system for ac/dc converter |
-
1982
- 1982-09-20 JP JP57162318A patent/JPS5953036A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58112475A (en) * | 1981-12-26 | 1983-07-04 | Tokyo Electric Power Co Inc:The | Starting system for ac/dc converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0421275A (en) * | 1990-05-15 | 1992-01-24 | Victor Co Of Japan Ltd | Small sized video equipment and camera holder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5953036A (en) | 1984-03-27 |
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