JPS6150315A - Transformer cooling device - Google Patents
Transformer cooling deviceInfo
- Publication number
- JPS6150315A JPS6150315A JP17157784A JP17157784A JPS6150315A JP S6150315 A JPS6150315 A JP S6150315A JP 17157784 A JP17157784 A JP 17157784A JP 17157784 A JP17157784 A JP 17157784A JP S6150315 A JPS6150315 A JP S6150315A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- variable voltage
- signal
- frequency
- voltage frequency
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は送油風冷式等の強制冷却式変圧器の冷却装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cooling device for a forced cooling type transformer such as an oil feed air cooling type.
近年、省エネルギー化の観点から、変圧器についても補
機損失の低減が要求されてきており、冷却器の送油Ｉン
プ及びファンを駆動する誘導電動機（以下、送油ポンプ
モータ、ファンモータと称す）を可変電圧周波数インバ
ータによシ交流可変速駆動する変圧器冷却装置が増えて
きている。In recent years, from the perspective of energy saving, there has been a demand for reduction of auxiliary equipment loss in transformers. ) are increasingly being used to drive AC variable speeds using variable voltage frequency inverters.
送油ポンプモータ及びファンモータを交流可変速駆動す
ると、その駆動用電流である可変電圧周波数インバータ
の出力周波数が変化すれはモータの回転数が変化し、送
油量及び送風量が変化するので冷却器の冷却能力と補機
損失が低下する。すなわち、送油ポングモ〜り及びファ
ンモータのトルクが回転数のほぼ３乗に比例して変化す
るのに対し、送油ポンプ及びファンの回転数変化に対す
る冷却能力の変化は一般に補機損失の変化に比べて緩や
かなので冷却器全体の冷却能力の変化を送油ポンプモー
タ及びファンモータの回転数の変化によって行うと補機
損失が低下する。When the oil pump motor and fan motor are driven at AC variable speed, when the output frequency of the variable voltage frequency inverter, which is the driving current, changes, the motor rotation speed changes, and the amount of oil and air blown changes, which leads to cooling. The cooling capacity of the equipment and the loss of auxiliary equipment will decrease. In other words, while the torque of the oil pump and fan motor changes approximately in proportion to the cube of the rotation speed, changes in cooling capacity due to changes in the rotation speed of the oil pump and fan are generally caused by changes in auxiliary equipment loss. Since the cooling capacity of the entire cooler is changed by changing the rotational speed of the oil pump motor and fan motor, the loss of auxiliary equipment is reduced.
とのように冷却器の送油ポンプモーフ及びファンモータ
を可変電圧周波数インバータにより交流可変速駆動した
場合、変圧器の負荷状態に応じた周波数指令信号に対す
る可変電圧周波数インバータの出力周波数金弟３図のよ
うな特性で制御すると、第４図のように可変電圧周波数
インバータの出力周波数のある点（第４図では５．．５
．。When the oil feed pump morph and fan motor of the cooler are driven at AC variable speed by a variable voltage frequency inverter, the output frequency of the variable voltage frequency inverter in response to the frequency command signal according to the load condition of the transformer is as shown in Figure 3. When controlled with such characteristics, the output frequency of the variable voltage frequency inverter is controlled at a certain point (5..5 in Figure 4) as shown in Figure 4.
．． .
５１９周波数）で送油ポンプモータ及びファンモータを
含む冷却器が共振し、騒音が高くなる。変電所等の変圧
器は屋外に設置されることが多く、特に民家等圧近接し
て設置される場合は、この騒音が問題になってくる。519 frequency), the cooler including the oil pump motor and fan motor resonates, resulting in high noise. Transformers in substations and the like are often installed outdoors, and this noise becomes a problem, especially when they are installed close to private houses.
本発明は、変圧器の冷却器の送油ポンプモータ及びファ
ンモータを可変電圧周波数インバータにより交流可変駆
動する場合に生ずる冷却器の共振による騒音を低減する
ために、可変電圧周波数インバータの出力周波数を共振
点から逃がすように制御して、前述のような騒音の問題
を解消することを目的とするものである。The present invention aims at reducing the output frequency of the variable voltage frequency inverter in order to reduce the noise caused by the resonance of the cooler that occurs when the oil feed pump motor and fan motor of the transformer cooler are variably driven with alternating current by the variable voltage frequency inverter. The purpose of this is to control the noise so that it escapes from the resonance point, thereby solving the above-mentioned noise problem.
本発明は、変圧器の負荷状態または、冷却状態１
に応じた周波数指令に対して、可変電圧周波数イン
バータの出力周波数を変圧器の冷却器の共振点から逃が
すようヒステリシスを有する階段状に制御することを特
徴とする。The present invention provides a load state or cooling state 1 of a transformer.
The present invention is characterized in that the output frequency of the variable voltage frequency inverter is controlled in a stepwise manner with hysteresis so as to escape from the resonance point of the cooler of the transformer in response to a frequency command corresponding to the frequency command.
第１図は本発明の一笑施例を示す変圧器冷却装置の構成
図であり、変圧器１には冷却媒体でｂる油が入っている
。２は冷却器で、３は冷却器媒体である油を変圧器１と
冷却器２との間で循環させる送油ポンプ及びモータであ
り、４は冷却器２に送られた油を冷却する送風用ファン
及びモータである。また、５は又流電源で、電磁接触器
６を介して、可変電圧周波数インパーク７に供給される
。FIG. 1 is a block diagram of a transformer cooling device showing a simple embodiment of the present invention, and a transformer 1 contains oil as a cooling medium. 2 is a cooler; 3 is an oil pump and motor that circulates oil, which is a cooler medium, between the transformer 1 and the cooler 2; and 4 is an air blower that cools the oil sent to the cooler 2. fan and motor. Further, 5 is a current power source, which is supplied to a variable voltage frequency impark 7 via an electromagnetic contactor 6.
一方、変流器８及び検出器９により検出された負荷信号
ａは演算制御部１０に入力され、変圧器１の負荷状態に
応じた所要の冷却能力を求め、これに対する冷却器２の
送油ポンプモータ３及び７ア／モータ４の回転数が得ら
れるような可変電圧周波数インバータ７の出力周波数と
なる信号をレベル判別部１１に送る。レベル判別部１１
ではこの信号が冷却器２の共振する可変電圧周波数イン
バータフの出力周波数になるか否かを判別し、もし共振
周波数に相当する信号の場合は、第２図のように共振点
を逃がすように可変電圧周波数インバータ５へ制御信号
すを与える。On the other hand, the load signal a detected by the current transformer 8 and the detector 9 is input to the arithmetic and control unit 10, which determines the required cooling capacity according to the load state of the transformer 1, and supplies oil to the cooler 2 in response to the required cooling capacity. A signal having an output frequency of the variable voltage frequency inverter 7 that allows the rotational speed of the pump motors 3 and 7a/motor 4 to be obtained is sent to the level determination section 11. Level discrimination section 11
Then, determine whether or not this signal corresponds to the output frequency of the variable voltage frequency inverter that resonates in the cooler 2. If the signal corresponds to the resonant frequency, try to remove the resonance point as shown in Figure 2. A control signal is provided to the variable voltage frequency inverter 5.
今、第４図のように共振により騒音が高くなる可変電圧
周波数インバータフの出力周波数を５□とし、その時の
負荷信号ａｔ−ａ、とする。この時、演算制御部１０及
びレベル判別部１１は次のような制御を行う。第２図に
おいて、負荷信号ａが変化してａ 、／を越えると、可
変電圧周波数−インバータ５の出力周波数はｆ 、／か
らｆ ｊｌになり、更に負荷信号ａが共振点に相当する
ａｌになっても共振周波数でないｆ、ＩＬのままである
。一方負荷信号ａが１１″を越えたところから下がって
きた場合は共振点に相当するａｌになっても可変電圧周
波数インバータ５の出力周波数は共振周波数でないｆ８
″を保ち、ａ工′になるとｆ、／になる。すなわち、可
変電圧周波数インバータｆの出力周波数が共振点ｆ１と
ならないよう階段状に逃がす。また変圧器１の負荷状態
の変動によ多負荷信号ａがａ１付近で変化した場合、可
変電圧周波数インパーク５の出力周波数がｆｌｌとｆ、
ｊｌとの間で変動し、送油インプモータ３及びファンモ
ータ４が＃ｊＩ繁に加減速を行うことになるので、これ
を防止するためヒステリシスを設けている。Now, let us assume that the output frequency of the variable voltage frequency inverter whose noise increases due to resonance as shown in FIG. 4 is 5□, and the load signal at that time is at-a. At this time, the arithmetic control section 10 and the level determination section 11 perform the following control. In Fig. 2, when the load signal a changes to exceed a, /, the output frequency of the variable voltage frequency inverter 5 changes from f, / to fjl, and furthermore, the load signal a changes to al, which corresponds to the resonance point. Even if f, IL remains at the resonant frequency. On the other hand, if the load signal a drops from a point exceeding 11'', the output frequency of the variable voltage frequency inverter 5 is not at the resonance frequency f8 even if it reaches al which corresponds to the resonance point.
'', and when it reaches a, it becomes f, /.In other words, the output frequency of the variable voltage frequency inverter f is released in a stepwise manner so that it does not reach the resonance point f1.Also, due to changes in the load condition of the transformer 1, When the signal a changes around a1, the output frequency of the variable voltage frequency impark 5 changes to fll and f,
#jl and the oil feed imp motor 3 and fan motor 4 will frequently accelerate and decelerate #jl, so hysteresis is provided to prevent this.
以上の説明は第４図の共振点Ｔｈｒ ｆ＋について述
べたがａ２−ｆｔ ｒ ｌ１ａ−ｆｓ及び他の共振点
についても同様な制御を行うことにより共振による騒音
を低減させることができる。なお、上記の説明では演算
制御部とレベル判別部を個々に設けた場合について述べ
たが演算制御部の中にレベル判別機能を含めても、同様
な制御を行うことができる。The above description has been made regarding the resonance point Thr f+ in FIG. 4, but noise due to resonance can be reduced by performing similar control on a2-ft r l1a-fs and other resonance points. Although the above explanation deals with the case where the arithmetic control section and the level discrimination section are provided separately, the same control can be performed even if the level discrimination function is included in the arithmetic control section.
また上記の説明では検出器で変圧器の負荷電流を検出し
て可変電圧周波数インバータを制御する場合について述
べたが変圧器油温度、周囲温度等、変圧器の冷却状態に
応じた信号を検出する場合に適用しても同様な効果が期
待できる。Also, in the above explanation, we have described the case where the variable voltage frequency inverter is controlled by detecting the load current of the transformer with a detector, but it is also possible to detect signals according to the cooling state of the transformer, such as the transformer oil temperature, ambient temperature, etc. A similar effect can be expected when applied to other cases.
以上のように本発明によれば変圧器の冷却器が共振する
可変電圧周波数インバータの出力周波数を逃がすように
制御されるので、共振による騒音が低減され、騒音によ
る問題を解消することができる。As described above, according to the present invention, since the cooler of the transformer is controlled to release the output frequency of the resonant variable voltage frequency inverter, the noise caused by the resonance is reduced, and the problem caused by the noise can be solved.
第１図は本発明の一笑施例を示すブロック図、第２図は
その制御特性図、第３図は可変電圧周波数インバータの
出力周波数に対する騒音の特性図、第４図は従来の可変
電圧周波数イ／パータの出力周波数に対する周波数指令
信号特性図である。
１・・・変圧器、２・・・冷却器、３・・・送油Ｉンゾ
・モータ、４・・・ファンモータ、５・・・交流電源、
６・・・電磁接触器、７・・・可変電圧周波数インバー
タ、８・・・変流器、９・・・検出器、１０・・・演算
制御部、１１・・・レベル判別部。
第１図
第２図
一電 術イ慮号
第３図
第４Fig. 1 is a block diagram showing a simple embodiment of the present invention, Fig. 2 is a control characteristic diagram thereof, Fig. 3 is a noise characteristic diagram with respect to the output frequency of a variable voltage frequency inverter, and Fig. 4 is a conventional variable voltage frequency inverter. FIG. 3 is a frequency command signal characteristic diagram with respect to the output frequency of the i/parter. 1...Transformer, 2...Cooler, 3...Oil supply motor, 4...Fan motor, 5...AC power supply,
6... Electromagnetic contactor, 7... Variable voltage frequency inverter, 8... Current transformer, 9... Detector, 10... Arithmetic control section, 11... Level discrimination section. Figure 1 Figure 2 Idenjutsu Ikugo Figure 3 Figure 4
Claims (1)
動する誘導電動機を可変電圧周波数インバータにより交
流可変速駆動する変圧器冷却装置において、変圧器の負
荷状態または冷却状態を検出する検出器と、その信号に
より前記可変電圧周波数インバータの出力周波数を制御
する信号を発生する演算制御部と、冷却器の共振周波数
を判別するレベル判別部とを備え、冷却器が共振する周
波数を逃がすよう前記可変電圧周波数を階段状に制御す
ることを特徴とする変圧器冷却装置。A detector for detecting a load state or a cooling state of a transformer in a transformer cooling system in which an induction motor that drives a cooler oil pump and a fan of a forced cooling transformer is driven at an AC variable speed by a variable voltage frequency inverter; an arithmetic control unit that generates a signal for controlling the output frequency of the variable voltage frequency inverter based on the signal; and a level determination unit that determines the resonant frequency of the cooler; A transformer cooling device characterized by stepwise frequency control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17157784A JPS6150315A (en) | 1984-08-20 | 1984-08-20 | Transformer cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17157784A JPS6150315A (en) | 1984-08-20 | 1984-08-20 | Transformer cooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6150315A true JPS6150315A (en) | 1986-03-12 |
Family
ID=15925726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17157784A Pending JPS6150315A (en) | 1984-08-20 | 1984-08-20 | Transformer cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6150315A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890520A (en) * | 2011-07-20 | 2013-01-23 | 上海海能信息科技有限公司 | Method for controlling energy saving and benefit increasing of transformer |
-
1984
- 1984-08-20 JP JP17157784A patent/JPS6150315A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890520A (en) * | 2011-07-20 | 2013-01-23 | 上海海能信息科技有限公司 | Method for controlling energy saving and benefit increasing of transformer |
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