JP2003100529A - On-load tap changing device - Google Patents
On-load tap changing deviceInfo
- Publication number
- JP2003100529A JP2003100529A JP2001295597A JP2001295597A JP2003100529A JP 2003100529 A JP2003100529 A JP 2003100529A JP 2001295597 A JP2001295597 A JP 2001295597A JP 2001295597 A JP2001295597 A JP 2001295597A JP 2003100529 A JP2003100529 A JP 2003100529A
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- Prior art keywords
- switching
- temperature
- tap
- load
- value
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、負荷時タップ切換
器の異常を確実に検出することができる負荷時タップ切
換装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load tap changer capable of reliably detecting an abnormality of a load tap changer.
【０００２】[0002]
【従来の技術】負荷時タップ切換装置は、送配電系統に
おける電源電圧の変動や負荷電流の変化による電圧変動
を補償するために変圧器に設けられ、変圧器のタップを
切換えて系統電圧を一定に保つものである。この負荷時
タップ切換装置が故障すると、変圧器に重大な損傷を与
えて広範囲な停電が発生するおそれがある。2. Description of the Related Art A tap switching device during load is provided in a transformer for compensating for voltage fluctuations due to power supply voltage fluctuations and load current fluctuations in a power transmission and distribution system, and switches the taps of the transformer to keep the system voltage constant. It is something to keep. If the load tap changer fails, the transformer may be seriously damaged and a wide range of power failure may occur.
【０００３】図３は、負荷時タップ切換変圧器１に設け
られた負荷時タップ切換装置２を示す。また、図４及び
図５は、負荷時タップ切換器４の切換開閉器４１とタッ
プ選択器４２との電気的な接続状態を示し、図４では、
負荷時タップ切換変圧器１のタップ番号での運転状態
の一例を示し、図５では、タップ番号での運転状態の
一例を示す。FIG. 3 shows a load tap changeover device 2 provided in the load tap changeover transformer 1. 4 and 5 show an electrical connection state between the switching switch 41 and the tap selector 42 of the load tap switching device 4, and in FIG.
An example of the operating state of the tap change transformer 1 under load is shown, and FIG. 5 shows an example of the operating state of tap number.
【０００４】この従来の負荷時タップ切換装置２は、負
荷時タップ切換器４と異常判定部７とから成っている。
また、負荷時タップ切換器４は、切換開閉器４１とタッ
プ選択器４２とから成っており、この切換開閉器４１室
内には切換部４１ａ、限流抵抗器４１ｂ及び室内に充填
された絶縁油４１ｃの温度を検出する温度検出部６が設
けられている。ここで、温度検出部６と異常判定部７と
は電気的に接続されいる。The conventional load tap changer 2 comprises a load tap changer 4 and an abnormality judging section 7.
The load tap changer 4 is composed of a changeover switch 41 and a tap selector 42. Inside the changeover switch 41, a changeover section 41a, a current limiting resistor 41b and insulating oil filled in the room are provided. A temperature detection unit 6 that detects the temperature of 41c is provided. Here, the temperature detection unit 6 and the abnormality determination unit 7 are electrically connected.
【０００５】タップ選択器４２は、切換開閉器４１と組
み合わせて使用され、切換開閉器４１の動作前に無電圧
の状態で、タップ選択線４２ａ又は４２ｂで所望のタッ
プに切換開閉器４１を電気的に接続する。The tap selector 42 is used in combination with the switching switch 41, and the switching switch 41 is electrically connected to a desired tap with the tap selection line 42a or 42b in a non-voltage state before the operation of the switching switch 41. Connect to each other.
【０００６】切換開閉器４１は、有電圧の状態で可動接
点Ｃを固定接点Ｍ１，Ｒ１，Ｒ２，Ｍ２と摺動させる。
また、固定接点Ｒ１とタップ選択線４２ａ及び固定接点
Ｒ２とタップ選択線４２ｂとの間に電気的に接続された
限流抵抗器４１ｂは、切換動作中の負荷電流及びタップ
間の循環電流の大きさを制限する。The switching switch 41 causes the movable contact C to slide on the fixed contacts M1, R1, R2 and M2 in a voltage applied state.
Further, the current limiting resistor 41b electrically connected between the fixed contact R1 and the tap selection line 42a and between the fixed contact R2 and the tap selection line 42b is used for the load current during the switching operation and the circulating current between the taps. Limit the size.
【０００７】異常判定部７は、異常判定を行う演算判定
部７ａと判定結果を表示する表示部７ｂとから成ってい
る。The abnormality judging section 7 comprises an operation judging section 7a for judging an abnormality and a display section 7b for displaying a judgment result.
【０００８】上記のような負荷時タップ切換装置２で
は、送配電系統の電圧変動が一定の限度を越えた場合に
自動的にタップ切換動作が行われる。ここでは、図４の
タップ番号での運転状態から、図５のタップ番号で
の運転状態に切換える一例を以て切換動作を説明する。In the load tap switching device 2 as described above, the tap switching operation is automatically performed when the voltage fluctuation of the power transmission and distribution system exceeds a certain limit. Here, the switching operation will be described by taking an example of switching from the driving state with the tap number in FIG. 4 to the driving state with the tap number in FIG.
【０００９】先ず、図示しない制御部から切換信号が発
信され、図示しない電動操作機構が起動して負荷時タッ
プ切換器４を駆動する。負荷時タップ切換器４が駆動さ
れると、タップ選択器４２では無電圧の状態で、タップ
選択線４２ｂがタップ番号から離れてタップ番号に
投入される。続いて、切換開閉器４１では、可動接点Ｃ
が固定接点Ｍ１からＲ１，Ｒ２，Ｍ２と摺動して固定接
点Ｍ２に接続され、通電タップがタップ番号からへ
切換わり１タップの切換動作が終了する。First, a switching signal is transmitted from a control unit (not shown) and an electric operating mechanism (not shown) is activated to drive the tap switch 4 during load. When the tap changer 4 under load is driven, the tap selection line 42b separates from the tap number and enters the tap number with no voltage applied to the tap selector 42. Then, in the switching switch 41, the movable contact C
Is connected to the fixed contact M2 by sliding from the fixed contact M1 to R1, R2 and M2, the energization tap is switched from the tap number, and the switching operation for one tap is completed.
【００１０】上記のような切換動作が正常に行われる
と、限流抵抗器４１ｂでは、切換動作中に負荷電流及び
タップ間の循環電流が流れて発熱し絶縁油４１ｃの温度
が上昇する。When the above switching operation is normally performed, in the current limiting resistor 41b, a load current and a circulating current between the taps flow during the switching operation to generate heat and the temperature of the insulating oil 41c rises.
【００１１】また、上記のような切換動作において、例
えば、負荷時タップ切換器４が何らかの損傷を受けて切
換動作が切換途中で停止した場合には、限流抵抗器４１
ｂに通電し続けることになり、正常時よりも絶縁油４１
ｃの温度が大きく上昇して危険温度を越えると共に、限
流抵抗器４１ｂの焼損に至る。In the switching operation as described above, for example, when the load tap changer 4 is damaged and the switching operation is stopped during the switching operation, the current limiting resistor 41 is used.
b will continue to be energized, and insulating oil 41
The temperature of c greatly increases and exceeds the dangerous temperature, and the current limiting resistor 41b burns out.
【００１２】異常判定部７の演算判定部７ａでは、これ
らの絶縁油４１ｃの温度を監視して、予め設定された絶
縁油の危険温度（例えば１００℃）よりも高い場合は異
常と判定し、電源遮断部８に遮断信号を発信して判定結
果を表示部７ｂに表示する。The operation determination unit 7a of the abnormality determination unit 7 monitors the temperatures of these insulating oils 41c and determines that they are abnormal when the temperature is higher than a preset dangerous temperature of insulating oil (for example, 100 ° C.). A cutoff signal is transmitted to the power cutoff unit 8 and the determination result is displayed on the display unit 7b.
【００１３】また、上記絶縁油４１ｃの温度上昇の上昇
率を監視して、予め設定された絶縁油の危険温度上昇率
（例えば３℃／分）よりも高い場合は異常と判定するも
のもある（特公平８−１８５９）。In some cases, the rate of increase in the temperature of the insulating oil 41c is monitored, and if it is higher than a preset dangerous temperature increase rate of the insulating oil (for example, 3 ° C./minute), it is determined to be abnormal. (Japanese Patent Publication No. 8-1859).
【００１４】[0014]
【発明が解決しようとする課題】図３に示した従来の負
荷時タップ切換装置２おいて、切換信号が発信されても
負荷時タップ切換器４が何らかの損傷によって動作しな
かった場合には、可動接点Ｃが切換開始位置（固定接点
Ｍ１又はＭ２の位置）に停留することになり、限流抵抗
器４１ｂは通電されないために絶縁油４１ｃの温度は上
昇しない。したがって、絶縁油４１ｃの温度又は温度上
昇率からは、この状態を検出することができない。In the conventional load tap changer 2 shown in FIG. 3, when the load tap changer 4 does not operate due to some damage even when the changeover signal is transmitted, The movable contact C stays at the switching start position (position of the fixed contact M1 or M2), and the current limiting resistor 41b is not energized, so that the temperature of the insulating oil 41c does not rise. Therefore, this state cannot be detected from the temperature or the rate of temperature rise of the insulating oil 41c.
【００１５】本発明の目的は、切換開閉器室内の絶縁油
の温度上昇を伴う負荷時タップ切換器の異常を検出する
と共に、温度上昇を伴わない異常をも検出することがで
きる負荷時タップ切換装置を提供することにある。An object of the present invention is to detect an abnormality in a load tap changer accompanied by a temperature rise of insulating oil in a switchgear chamber and also to detect an abnormality without a temperature rise. To provide a device.
【００１６】[0016]
【課題を解決するための手段】本発明は、切換信号の発
信時点から基準切換時間が経過した時点までの切換開閉
器室内の絶縁油の温度上昇値を求めて、この温度上昇値
と基準温度上昇値とを比較して異常の検出を行う負荷時
タップ切換装置に関するものである。SUMMARY OF THE INVENTION According to the present invention, a temperature rise value of insulating oil in a switching switch chamber from a time point when a switching signal is transmitted to a time point when a reference switching time has elapsed is obtained, and the temperature rise value and the reference temperature are calculated. The present invention relates to a load tap switching device that compares an increase value and detects an abnormality.
【００１７】請求項１に記載の発明は、負荷時タップ切
換器の切換開閉器室内の絶縁油の温度を検出する温度検
出部を切換開閉器室内に設け、切換信号の発信時点で検
出された絶縁油の第一温度と切換信号の発信時点から予
め設定された基準切換時間が経過した時点で検出された
第二温度とから温度上昇値を算出して、この温度上昇値
がゼロの場合、また、温度上昇値が予め設定された基準
温度上昇値よりも大きい場合は異常と判定するようにし
たものである。請求項１の発明においては、絶縁油の温
度上昇を伴う異常を検出すると共に、温度上昇を伴わな
い異常をも検出することができる。According to the first aspect of the present invention, a temperature detector for detecting the temperature of the insulating oil in the switching switch chamber of the tap changer during load is provided in the switching switch chamber, and the temperature is detected when the switching signal is transmitted. A temperature rise value is calculated from the first temperature of the insulating oil and the second temperature detected at the time when a preset reference switching time has elapsed from the time of transmission of the switching signal, and when the temperature rise value is zero, Further, when the temperature rise value is larger than a preset reference temperature rise value, it is determined that the abnormality. According to the first aspect of the present invention, it is possible to detect the abnormality accompanied by the temperature rise of the insulating oil and also the abnormality not accompanied by the temperature rise.
【００１８】請求項２に記載の発明は、基準切換時間
を、負荷時タップ切換器の１タップの正常な切換動作に
要する時間とするようにしたものである。請求項２の発
明においては、異常判定を遅らせることなく適正な時間
経過後に異常判定できる。According to a second aspect of the present invention, the reference switching time is set to a time required for a normal switching operation of one tap of the load tap changer. According to the second aspect of the invention, the abnormality determination can be performed after a proper time has elapsed without delaying the abnormality determination.
【００１９】請求項３に記載の発明は、基準温度上昇値
を、切換信号の発信時点の直前の切換情報及び基準切換
時間に基づいて算出するようにしたものである。請求項
３の発明においては、負荷時タップ切換器の最新の切換
状態を反映することができ正確な基準温度上昇値の設定
ができる。According to the third aspect of the present invention, the reference temperature rise value is calculated based on the switching information and the reference switching time immediately before the time when the switching signal is transmitted. According to the third aspect of the invention, the latest switching state of the load tap changer can be reflected and an accurate reference temperature rise value can be set.
【００２０】請求項４に記載の発明は、切換情報を、負
荷電流値、タップ間電圧値、限流抵抗値、切換音及び回
転数、又は、負荷電流値、タップ間電圧値及び限流抵抗
値としたものである。請求項４の発明においては、切換
情報の算出が簡略化できる。According to a fourth aspect of the present invention, the switching information includes load current value, voltage value between taps, current limiting resistance value, switching sound and rotation speed, or load current value, voltage value between taps and current limiting resistance. It is a value. In the invention of claim 4, the calculation of the switching information can be simplified.
【００２１】[0021]
【発明の実施の形態】図１は、本発明に係る負荷時タッ
プ切換装置の一実施形態を示す。この実施形態では、切
換信号の発信時点で検出された絶縁油の第一温度と切換
信号の発信時点から基準切換時間が経過した時点で検出
された第二温度とから温度上昇値を算出し、この温度上
昇値と基準温度上昇値とを比較して負荷時タップ切換器
の異常の検出を行うものである。また、図２は、本発明
に係る異常判定方法のフローチャートを示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a tap switching device under load according to the present invention. In this embodiment, the temperature rise value is calculated from the first temperature of the insulating oil detected at the time of transmitting the switching signal and the second temperature detected at the time when the reference switching time has elapsed from the time of transmitting the switching signal, The temperature rise value and the reference temperature rise value are compared to detect an abnormality in the tap switch during load. Further, FIG. 2 shows a flowchart of the abnormality determination method according to the present invention.
【００２２】ここで、図１において、図３に示した従来
の負荷時タップ切換装置の各部と同等の部分にはそれぞ
れ同一の符号を付してある。Here, in FIG. 1, the same parts as those of the conventional load tap switching device shown in FIG. 3 are designated by the same reference numerals.
【００２３】この実施形態の負荷時タップ切換装置１０
は、負荷時タップ切換器４と異常判定部１２とから成っ
ている。また、負荷時タップ切換器４は、切換開閉器４
１とタップ選択器４２とから成っており、この切換開閉
器４１室内には切換部４１ａ、限流抵抗器４１ｂ及び室
内に充填された絶縁油４１ｃの温度を検出する温度検出
部６が設けられている。ここで、温度検出部６は、例え
ば限流抵抗器４１ｂの近傍に設けられており、異常判定
部１２とは電気的に接続されている。Load tap changer 10 of this embodiment
Is composed of an on-load tap changer 4 and an abnormality determination unit 12. Further, the tap switch 4 under load is the switching switch 4
1 and a tap selector 42. The switching switch 41 has a switching unit 41a, a current limiting resistor 41b and a temperature detecting unit 6 for detecting the temperature of the insulating oil 41c filled in the chamber. ing. Here, the temperature detection unit 6 is provided, for example, in the vicinity of the current limiting resistor 41b, and is electrically connected to the abnormality determination unit 12.
【００２４】タップ選択器４２は、切換開閉器４１と組
み合わせて使用され、切換開閉器４１の動作前に無電圧
の状態で、タップ選択線４２ａ又は４２ｂで所望のタッ
プに切換開閉器４１を電気的に接続する。The tap selector 42 is used in combination with the switching switch 41, and the switching switch 41 is electrically connected to a desired tap with the tap selection line 42a or 42b in a non-voltage state before the switching switch 41 operates. Connect to each other.
【００２５】切換開閉器４１は、有電圧の状態で可動接
点Ｃを固定接点Ｍ１，Ｒ１，Ｒ２，Ｍ２と摺動させる。
また、固定接点Ｒ１とタップ選択線４２ａ及び固定接点
Ｒ２とタップ選択線４２ｂとの間に電気的に接続された
限流抵抗器４１ｂは、切換動作中の負荷電流及びタップ
間の循環電流の大きさを制限する。The switching switch 41 causes the movable contact C to slide on the fixed contacts M1, R1, R2 and M2 in a voltage applied state.
Further, the current limiting resistor 41b electrically connected between the fixed contact R1 and the tap selection line 42a and between the fixed contact R2 and the tap selection line 42b is used for the load current during the switching operation and the circulating current between the taps. Limit the size.
【００２６】異常判定部１２は、基準切換時間及び基準
温度上昇値を設定する基準値設定部１２ａと、異常判定
を行う演算判定部１２ｂとから成っている。The abnormality judging section 12 comprises a reference value setting section 12a for setting the reference switching time and the reference temperature rise value, and a calculation judging section 12b for judging the abnormality.
【００２７】上記のような負荷時タップ切換装置１０で
は、送配電系統の電圧変動が一定の限度を越えた場合に
自動的にタップ切換動作が行われる。ここでは、図４の
タップ番号での運転状態から、図５のタップ番号で
の運転状態に切換える一例を以て切換動作を説明する。In the load tap switching device 10 as described above, the tap switching operation is automatically performed when the voltage fluctuation of the power transmission and distribution system exceeds a certain limit. Here, the switching operation will be described by taking an example of switching from the driving state with the tap number in FIG. 4 to the driving state with the tap number in FIG.
【００２８】先ず、切換信号の発信によって図示しない
電動操作機構が起動して負荷時タップ切換器４を駆動す
る。負荷時タップ切換器４が駆動されると、タップ選択
器４２では無電圧状態で、タップ選択線４２ｂがタップ
番号から離れてタップ番号に投入される。続いて、
切換開閉器４１では、可動接点Ｃが固定接点Ｍ１からＲ
１，Ｒ２，Ｍ２と摺動してＭ２に接続され、通電タップ
がタップ番号からへ切換わり１タップの切換動作が
終了する。First, an electric operation mechanism (not shown) is activated by the transmission of the switching signal to drive the tap switch during load 4. When the tap changer 4 under load is driven, the tap selection line 42b is placed in the tap number apart from the tap number in the tap selector 42 with no voltage applied. continue,
In the switching switch 41, the movable contact C changes from the fixed contact M1 to R.
1, R2, M2 are slid and connected to M2, the energization tap is switched from the tap number, and the switching operation for one tap is completed.
【００２９】また、上記動作に並行して、温度検出部６
では切換信号の発信時点で絶縁油の第一温度が検出さ
れ、切換信号の発信時点から基準切換時間が経過した時
点で第二温度が検出される。更に、基準値設定部１２ａ
にて、基準切換時間及び基準温度上昇値が設定される。Further, in parallel with the above operation, the temperature detecting section 6
Then, the first temperature of the insulating oil is detected when the switching signal is transmitted, and the second temperature is detected when the reference switching time elapses from the time when the switching signal is transmitted. Further, the reference value setting unit 12a
At, the reference switching time and the reference temperature rise value are set.
【００３０】上記のような切換動作が正常に行われる
と、限流抵抗器４１ｂでは、切換動作中に負荷電流及び
タップ間の循環電流が流れて発熱し絶縁油４１ｃの温度
が上昇する。When the switching operation as described above is normally performed, the load current and the circulating current between the taps flow in the current limiting resistor 41b during the switching operation to generate heat and the temperature of the insulating oil 41c rises.
【００３１】また、上記のような切換動作において、例
えば、負荷時タップ切換器４が何らかの損傷を受けて切
換動作が切換途中で停止した場合には、限流抵抗器４１
ｂに通電し続けることになり、正常時よりも絶縁油４１
ｃの温度が大きく上昇して基準温度上昇値を越えると共
に、限流抵抗器４１ｂの焼損に至る。In the switching operation as described above, for example, when the tap changer 4 under load is damaged and the switching operation is stopped during the switching operation, the current limiting resistor 41 is used.
b will continue to be energized, and insulating oil 41
The temperature of c greatly rises and exceeds the reference temperature rise value, and the current limiting resistor 41b burns out.
【００３２】また、上記のような切換動作において、切
換信号が発信されても負荷時タップ切換器４が何らかの
損傷によって動作しなかった場合には、可動接点Ｃが切
換開始位置（固定接点Ｍ１又はＭ２の位置）に停留する
ことになり、限流抵抗器４１ｂは通電されないために絶
縁油４１ｃの温度は上昇しない。Further, in the above switching operation, when the load tap changer 4 does not operate due to some damage even when the switching signal is transmitted, the movable contact C is moved to the switching start position (fixed contact M1 or Since the current limiting resistor 41b is not energized, the temperature of the insulating oil 41c does not rise.
【００３３】異常判定部１２の演算判定部１２ｂでは、
検出されたこれらの絶縁油４１ｃの温度から温度上昇値
を算出して、この温度上昇値が基準温度上昇値よりも大
きい場合は切換途中での停止等の異常と判定する。ま
た、この温度上昇値がゼロの場合は、可動接点Ｃが切換
開始位置に停留している等の異常と判定する。また、異
常と判定された場合には、電源遮断部８に遮断信号を発
信して判定結果を報知部１３で報知する。In the operation determination section 12b of the abnormality determination section 12,
A temperature rise value is calculated from the detected temperatures of these insulating oils 41c, and if the temperature rise value is larger than the reference temperature rise value, it is determined that the operation is abnormal such as a stop during switching. When the temperature rise value is zero, it is determined that the movable contact C is abnormal such as staying at the switching start position. In addition, when it is determined that there is an abnormality, a shutoff signal is transmitted to the power shutoff unit 8 and the determination unit 13 notifies the determination result.
【００３４】ここで、基準切換時間は、負荷時タップ切
換器の１タップの正常な切換動作に要する時間を設定す
ると、異常判定を遅らせることなく適正な時間経過後に
異常判定できる。Here, if the reference switching time is set to the time required for the normal switching operation of one tap of the load tap changer, the abnormality determination can be performed after a proper time has elapsed without delaying the abnormality determination.
【００３５】また、基準温度上昇値は、切換信号の発信
時点の直前の切換情報及び基準切換時間に基づいて算出
された温度上昇値を設定すると、負荷時タップ切換器の
最新の切換状態を反映することができ正確な基準温度上
昇値の設定ができる。If the temperature rise value calculated based on the switching information and the reference switching time immediately before the transmission of the switching signal is set as the reference temperature rise value, the latest switching state of the load tap changer is reflected. It is possible to set an accurate reference temperature rise value.
【００３６】また、切換情報は、負荷電流値、タップ間
電圧値、限流抵抗値、切換音及び回転数、又は、負荷電
流値、タップ間電圧値及び限流抵抗値とすると、切換情
報の算出が簡略化できる。Further, when the switching information is a load current value, a voltage value between taps, a current limiting resistance value, a switching sound and a rotation speed, or a load current value, a voltage value between taps and a current limiting resistance value, the switching information is The calculation can be simplified.
【００３７】[0037]
【発明の効果】以上のように請求項１に記載の発明によ
れば、負荷時タップ切換器の切換開閉器室内の絶縁油の
温度を検出する温度検出部を切換開閉器室内に設け、切
換信号の発信時点で検出された絶縁油の第一温度と切換
信号の発信時点から予め設定された基準切換時間が経過
した時点で検出された第二温度とから温度上昇値を算出
して、温度上昇値がゼロの場合、また、温度上昇値が予
め設定された基準温度上昇値よりも大きい場合は異常と
判定するようにしたので、絶縁油の温度上昇を伴う異常
を検出すると共に、温度上昇を伴わない異常をも検出す
ることができる。As described above, according to the first aspect of the present invention, the temperature detecting unit for detecting the temperature of the insulating oil in the switching switch chamber of the tap switch during load is provided in the switching switch chamber, and switching is performed. The temperature rise value is calculated from the first temperature of the insulating oil detected at the time of transmitting the signal and the second temperature detected at the time when the preset reference switching time elapses from the time of transmitting the switching signal. When the rise value is zero, or when the temperature rise value is larger than the preset reference temperature rise value, it is judged as abnormal.Therefore, the abnormality accompanied by the temperature rise of the insulating oil is detected and the temperature rise is detected. It is possible to detect an abnormality that is not accompanied by.
【００３８】請求項２に記載の発明によれば、基準切換
時間を、負荷時タップ切換器の１タップの正常な切換動
作に要する時間とするようにしたので、異常判定を遅ら
せることなく適正な時間経過後に異常判定できる。According to the second aspect of the present invention, the reference switching time is set to the time required for the normal switching operation of one tap of the load tap changer, so that it is appropriate without delaying the abnormality determination. An abnormality can be judged after a lapse of time.
【００３９】請求項３に記載の発明によれば、基準温度
上昇値を、切換信号の発信時点の直前の切換情報及び基
準切換時間に基づいて算出するようにしたので、負荷時
タップ切換器の最新の切換状態を反映することがで正確
な基準温度上昇値の設定ができる。According to the third aspect of the present invention, the reference temperature rise value is calculated based on the switching information immediately before the switching signal is transmitted and the reference switching time. By reflecting the latest switching state, it is possible to set an accurate reference temperature rise value.
【００４０】請求項４に記載の発明によれば、切換情報
を、負荷電流値、タップ間電圧値、限流抵抗値、切換音
及び回転数、又は、負荷電流値、タップ間電圧値及び限
流抵抗値としたので、切換情報の算出が簡略化できる。According to the invention described in claim 4, the switching information includes the load current value, the voltage value between taps, the current limiting resistance value, the switching sound and the rotation speed, or the load current value, the voltage value between taps and the limit value. Since the flow resistance value is used, the calculation of the switching information can be simplified.
【図１】本発明に係る負荷時タップ切換装置の構成図で
ある。FIG. 1 is a configuration diagram of a load tap switching device according to the present invention.
【図２】本発明に係る異常判定方法のフローチャートで
ある。FIG. 2 is a flowchart of an abnormality determination method according to the present invention.
【図３】負荷時タップ切換変圧器に設けられた従来の負
荷時タップ切換装置の構成図である。FIG. 3 is a configuration diagram of a conventional load tap switching device provided in the load tap switching transformer.
【図４】タップ番号で運転中の切換開閉器とタップ選
択器との電気的な接続状態の一例である。FIG. 4 is an example of an electrical connection state between a switching switch and a tap selector which are operating by tap numbers.
【図５】タップ番号で運転中の切換開閉器とタップ選
択器との電気的な接続状態の一例である。FIG. 5 is an example of an electrical connection state of a switching switch and a tap selector which are in operation with a tap number.
１ 負荷時タップ切換変圧器 ２ 負荷時タップ切換装置 ４ 負荷時タップ切換器 ４１ 切換開閉器 ４１ａ 切換部 ４１ｂ 限流抵抗器 ４１ｃ 絶縁油 ４２ タップ選択器 ４２ａ，４２ｂ タップ選択線 ６ 温度検出部 ７ 異常判定部 ７ａ 演算判定部 ７ｂ 表示部 ８ 電源遮断部 １０ 負荷時タップ切換装置 １２ 異常判定部 １２ａ 基準値設定部 １２ｂ 演算判定部 １３ 報知部 Ｃ 可動接点 Ｍ１，Ｍ２，Ｒ１，Ｒ２ 固定接点 ，，，， タップ番号 1 Tap change transformer under load 2 Tap switching device under load 4 Tap changer under load 41 Switching switch 41a Switching unit 41b Current limiting resistor 41c insulating oil 42 tap selector 42a, 42b Tap selection line 6 Temperature detector 7 Abnormality judgment part 7a Calculation determination unit 7b Display 8 Power cutoff unit 10 Tap changeover device under load 12 Abnormality judgment part 12a Reference value setting section 12b Calculation determination unit 13 Notification section C movable contact M1, M2, R1, R2 fixed contact ,,,, Tap number
Claims (4)
絶縁油の温度を検出する温度検出部と、切換信号の発信
時点で検出された前記絶縁油の第一温度と前期切換信号
の発信時点から予め設定された基準切換時間が経過した
時点で検出された第二温度とから温度上昇値を算出し
て、前記温度上昇値がゼロの場合、また、前記温度上昇
値が予め設定された基準温度上昇値よりも大きい場合は
異常と判定する異常判定部とを備えた負荷時タップ切換
装置。1. A temperature detector for detecting the temperature of insulating oil in a switching switch chamber of a load tap changer; a first temperature of the insulating oil detected at the time of transmitting a switching signal; The temperature rise value is calculated from the second temperature detected when the preset reference switching time has elapsed from the time point, and when the temperature rise value is zero, the temperature rise value is set in advance. An on-load tap switching device comprising an abnormality determination unit that determines an abnormality when the temperature is higher than a reference temperature rise value.
１タップの正常な切換動作に要する時間とする請求項１
に記載の負荷時タップ切換装置。2. The reference switching time is a time required for a normal switching operation of one tap of the load tap changer.
The tap changer under load described in.
の直前の切換情報及び基準切換時間に基づいて算出する
請求項１又は請求項２に記載の負荷時タップ切換装置。3. The load tap switching device according to claim 1, wherein the reference temperature increase value is calculated based on the switching information and the reference switching time immediately before the transmission of the switching signal.
値、限流抵抗値、切換音及び回転数、又は、負荷電流
値、タップ間電圧値及び限流抵抗値とする請求項３に記
載の負荷時タップ切換装置。4. The switching information is a load current value, a voltage value between taps, a current limiting resistance value, a switching sound and a rotation speed, or a load current value, a voltage value between taps and a current limiting resistance value. The tap switching device at the time of the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001295597A JP2003100529A (en) | 2001-09-27 | 2001-09-27 | On-load tap changing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001295597A JP2003100529A (en) | 2001-09-27 | 2001-09-27 | On-load tap changing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003100529A true JP2003100529A (en) | 2003-04-04 |
Family
ID=19116999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001295597A Pending JP2003100529A (en) | 2001-09-27 | 2001-09-27 | On-load tap changing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003100529A (en) |
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| JP2007288072A (en) * | 2006-04-19 | 2007-11-01 | Toshiba Corp | On-load tap changer |
| EP3324504A1 (en) * | 2016-11-22 | 2018-05-23 | ABB Schweiz AG | Monitoring tap changer switching |
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