TWI721633B

TWI721633B - Current monitoring method and device of transformer

Info

Publication number: TWI721633B
Application number: TW108140251A
Authority: TW
Inventors: 王冠翔; 張人文; 林佳慶
Original assignee: 華城電機股份有限公司
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2021-03-11
Also published as: TW202119051A

Abstract

A current monitoring method and device of a transformer are provided. The current monitoring method includes the following steps. The first step is detecting ground currents of a clamping structure and an iron core of the transformer. The next step is determining whether or not an abnormal current is generated according to the relationship between the ground currents of the clamping structure and the iron core. The last step is providing alarm information, in which an abnormal position is indicated, when the abnormal current is shown. Therefore, the maintenance person can quickly find out specific position(s) of failure point(s) to prevent serious damage to the transformer and avoid major accidents.

Description

變壓器的電流監測方法及裝置Transformer current monitoring method and device

本發明涉及一種電流監測方法及裝置，特別是涉及一種變壓器的電流監測方法及裝置。 The invention relates to a current monitoring method and device, in particular to a current monitoring method and device of a transformer.

變壓器是輸配電或是供電系統的重要設備之一，其一旦發生故障，將造成電力供應中斷，嚴重時甚至會造成公共安全問題及經濟損失。隨著堅強智慧電網建設工作的逐步推進，變壓器的故障診斷與狀態監測成為運行檢修工作的重點。然而，大型變壓器的內部結構與故障機理非常複雜，加上當前線上監測裝置的可靠性和有效性不高，因而變壓器運行過程中發生的異常故障很難被即時發現，檢修人員也無法做出緊急處理，往往時間一拖長，造成的影響和損失就很巨大，例如鐵心過熱熔毀。 Transformer is one of the important equipment of power transmission and distribution or power supply system. Once it fails, it will cause power supply interruption, and in serious cases, it may even cause public safety problems and economic losses. With the gradual advancement of the construction of a strong and smart grid, fault diagnosis and condition monitoring of transformers have become the focus of operation and maintenance. However, the internal structure and failure mechanism of large-scale transformers are very complicated, and the current online monitoring devices are not highly reliable and effective. Therefore, abnormal faults that occur during the operation of the transformer are difficult to detect immediately, and maintenance personnel cannot make emergency response. When the processing time is prolonged, the impact and loss will be huge, for example, the iron core is overheated and melted.

有鑑於此，各電力公司、科研院所、高等院校等開展了大量的針對變壓器故障及相關評價診斷的研究工作。 In view of this, various electric power companies, scientific research institutes, and universities have carried out a large number of researches on transformer faults and related evaluation and diagnosis.

本發明所要解決的技術問題在於，針對現有技術的不足提供一種變壓器的電流監測方法及裝置，其能防止變壓器發生嚴重損害，避免重大事故發生。 The technical problem to be solved by the present invention is to provide a transformer current monitoring method and device in view of the shortcomings of the prior art, which can prevent serious damage to the transformer and avoid major accidents.

為了解決上述的技術問題，本發明所採用的其中一技術方案是，提供一種變壓器的電流監測方法，所述變壓器包括一鐵心、一設置在所述鐵心外側的夾件以及一圍繞所述鐵心與所述夾件的外殼。所述變壓器的電流監測方法包括：偵測所述夾件的一第一接地電流值與所述鐵心的一第二接地電流值；根據所述第一接地電流值與所述第二接地電流值之間的一數值關係判斷是否發生一電流異常，並進一步確定所述電流異常是發生在所述夾件與所述鐵心之間、所述鐵心與所述外殼之間或所述夾件與所述外殼之間；以及若發生電流異常，則發出基於異常發生位置的一第一警報信息。 In order to solve the above-mentioned technical problems, one of the technical solutions adopted by the present invention is to provide a current monitoring method for a transformer, the transformer including an iron core, a clamp arranged on the outer side of the iron core, and a surrounding the iron core and The shell of the clip. The electricity of the transformer The current monitoring method includes: detecting a first ground current value of the clamp and a second ground current value of the iron core; according to a value between the first ground current value and the second ground current value The numerical relationship determines whether a current abnormality has occurred, and further determines whether the current abnormality occurs between the clamp and the iron core, between the iron core and the housing, or between the clamp and the housing And if an abnormal current occurs, a first alarm message based on the location of the abnormality is issued.

為了解決上述的技術問題，本發明所採用的另外一技術方案是，提供一種變壓器的電流監測裝置，所述變壓器包括一鐵心、一設置在所述鐵心外側的夾件以及一圍繞所述鐵心與所述夾件的外殼。所述電流監測裝置包括一裝置本體、一第一電流偵測單元、一第二電流偵測單元、一警報單元以及一處理單元。所述裝置本體具有一輸入端以及一輸出端，所述輸入端通過一第一接地線電性連接所述夾件，所述輸出端通過一第二接地線電性連接所述鐵心。所述第一電流偵測單元安裝在所述第一接地線上，用以偵測所述夾件的一第一接地電流值；所述第二電流偵測單元安裝在所述第二接地線上，用以偵測所述鐵心的一第二接地電流值；所述警報單元設置在所述裝置本體上；所述處理單元設置在所述裝置本體上，並電性連接所述第一電流偵測單元、所述第二電流偵測單元與所述警報單元。使用時，所述處理單元用以根據所述第一接地電流值與所述第二接地電流值之間的一數值關係判斷是否發生一電流異常，並進一步確定所述電流異常是發生在所述夾件與所述鐵心之間、所述鐵心與所述外殼之間或所述夾件與所述外殼之間；當發生電流異常時，所述處理單元控制所述警報單元發出基於異常發生位置的一第一警報信息。 In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide a current monitoring device for a transformer, the transformer including an iron core, a clamp arranged on the outer side of the iron core, and a surrounding the iron core and The shell of the clip. The current monitoring device includes a device body, a first current detection unit, a second current detection unit, an alarm unit, and a processing unit. The device body has an input terminal and an output terminal. The input terminal is electrically connected to the clip through a first ground wire, and the output terminal is electrically connected to the iron core through a second ground wire. The first current detection unit is installed on the first ground wire to detect a first ground current value of the clip; the second current detection unit is installed on the second ground wire, Used to detect a second ground current value of the iron core; the alarm unit is arranged on the device body; the processing unit is arranged on the device body and is electrically connected to the first current detection Unit, the second current detection unit and the alarm unit. When in use, the processing unit is used to determine whether a current abnormality occurs according to a numerical relationship between the first ground current value and the second ground current value, and further determine whether the current abnormality occurs in the Between the clip and the iron core, between the iron core and the housing, or between the clip and the housing; when an abnormal current occurs, the processing unit controls the alarm unit to issue a position based on the abnormality One of the first warning messages.

本發明的其中一有益效果在於，本發明所提供的變壓器的電流監測方法及裝置，其能通過“根據夾件與鐵心的接地電流值之間的關係判斷是否發生一電流異常，並進一步確定異常發生位置”的技術手段，使變壓器的損害降到最低。進一步而言，檢修人員能夠即時得知變壓器發生短路或多點接地，並快速找出故障點的具體位置，然後做出必要的應對措施。 One of the beneficial effects of the present invention is that the transformer current monitoring method and device provided by the present invention can determine whether a current abnormality occurs according to the relationship between the clamp and the ground current value of the iron core, and further determine the abnormality. Place" technology means that the transformer The damage is minimized. Furthermore, maintenance personnel can instantly know that the transformer is short-circuited or grounded at multiple points, and quickly find out the specific location of the fault point, and then make necessary countermeasures.

為使能更進一步瞭解本發明的特徵及技術內容，請參閱以下有關本發明的詳細說明與圖式，然而所提供的圖式僅用於提供參考與說明，並非用來對本發明加以限制。 In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

1:電流監測裝置 1: Current monitoring device

11:裝置本體 11: Device body

111:輸入端 111: Input

112:輸出端 112: output

12:第一電流偵測單元 12: The first current detection unit

13:第二電流偵測單元 13: The second current detection unit

14:警報單元 14: Alarm unit

15:處理單元 15: processing unit

16:第一脫線偵側單元 16: The first off-line detection side unit

17:第二脫線偵側單元 17: The second off-line detection side unit

18:溫度偵測單元 18: Temperature detection unit

19:儲存單元 19: storage unit

2:變壓器 2: Transformer

21:鐵心 21: iron core

22:夾件 22: Clip

23:外殼 23: shell

G1:第一接地線 G1: The first ground wire

G2:第二接地線 G2: second ground wire

S1-S3、S11a-S15a、S11b-S15b:方法步驟 S1-S3, S11a-S15a, S11b-S15b: method steps

圖1為本發明的變壓器的電流監測裝置的使用示意圖。 Figure 1 is a schematic diagram of the use of the transformer current monitoring device of the present invention.

圖2為圖1中II部分的局部放大圖。 Fig. 2 is a partial enlarged view of part II in Fig. 1.

圖3為本發明的變壓器的電流監測方法的流程圖。 Fig. 3 is a flow chart of the current monitoring method of the transformer of the present invention.

圖4為本發明的變壓器的電流監測方法的步驟S1的其中一細部流程圖。 4 is a detailed flowchart of step S1 of the transformer current monitoring method of the present invention.

圖5為本發明的變壓器的電流監測方法的步驟S1的另外一細部流程圖。 Fig. 5 is another detailed flowchart of step S1 of the transformer current monitoring method of the present invention.

以下是通過特定的具體實施例來說明本發明所公開有關“變壓器的電流監測方法及裝置”的實施方式，本領域技術人員可由本說明書所公開的內容瞭解本發明的優點與效果。本發明可通過其他不同的具體實施例加以施行或應用，本說明書中的各項細節也可基於不同觀點與應用，在不悖離本發明的構思下進行各種修改與變更。另外，本發明的附圖僅為簡單示意說明，並非依實際尺寸的描繪，事先聲明。以下的實施方式將進一步詳細說明本發明的相關技術內容，但所公開的內容並非用以限制本發明的保護範圍。 The following are specific examples to illustrate the implementation of the "transformer current monitoring method and device" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual size, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

應當可以理解的是，雖然本文中可能會使用到“第一”、“第二”、“第三”等術語來描述各種元件或者信號，但這些元件或者信號不應受這些術語的限制。這些術語主要是用以區分一元件與另一元件，或者一信號與另一信號。另外，本文中所使用的術語“或”，應視實際情況可能包括相關聯的列出項目中的任一個或者多個的組合。 It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or a letter Number and another signal. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

參閱圖1及圖2所示，本發明實施例提供一種電流監測裝置1，其串接在變壓器2的接地迴路上，以監測變壓器2接地電流的異常情況，確保變壓器2形成良好的接地效果。進一步而言，變壓器2包括一鐵心21、一夾件22及一外殼23，其中夾件22設置在鐵心21的外側，外殼23圍繞鐵心21與夾件22，且鐵心21與夾件22通過電流監測裝置1接地。關於鐵心21、夾件22與外殼23的構造，均為本領域技術人員所熟知，在此不加以贅述。 1 and 2, the embodiment of the present invention provides a current monitoring device 1 which is connected in series on the ground loop of the transformer 2 to monitor the abnormality of the ground current of the transformer 2 and ensure that the transformer 2 forms a good grounding effect. Furthermore, the transformer 2 includes an iron core 21, a clip 22 and a housing 23, wherein the clip 22 is arranged outside the iron core 21, the housing 23 surrounds the iron core 21 and the clip 22, and the iron core 21 and the clip 22 pass current The monitoring device 1 is grounded. The structures of the core 21, the clip 22, and the housing 23 are all well-known to those skilled in the art, and will not be repeated here.

電流監測裝置1主要包括一裝置本體11、一第一電流偵測單元12、一第二電流偵測單元13、一警報單元14及一處理單元15。裝置本體11具有一輸入端111及一輸出端112，其中輸入端111可通過一第一接地線G1電性連接夾件22，並通過一第二接地線G2電性連接鐵心21，且輸出端112接地；輸入端111可為一輸入端子組，輸出端112可為一輸出端子組，但不限於此。第一電流偵測單元12安裝在第一接地線G1上，用以偵測夾件22的接地電流(即第一接地電流)值，第二電流偵測單元13安裝在第二接地線G2上，用以偵測鐵心21的接地電流(即第二接地電流)值；第一電流偵測單元12與第二電流偵測單元13各可為一電流感測器(CT)，但不限於此。警報單元14設置在裝置本體11上，警報單元14可包括警示燈及蜂鳴器，但不限於此。處理單元15設置在裝置本體11上，並電性連接第一電流偵測單元12、第二電流偵測單元13與警報單元14；處理單元15可為一微處理器或一可程式化電路，但不限於此。 The current monitoring device 1 mainly includes a device body 11, a first current detection unit 12, a second current detection unit 13, an alarm unit 14 and a processing unit 15. The device body 11 has an input terminal 111 and an output terminal 112. The input terminal 111 can be electrically connected to the clip 22 through a first ground wire G1, and electrically connected to the iron core 21 through a second ground wire G2, and the output terminal 112 is grounded; the input terminal 111 can be an input terminal group, and the output terminal 112 can be an output terminal group, but it is not limited to this. The first current detection unit 12 is installed on the first ground wire G1 to detect the value of the ground current (ie, the first ground current) of the clip 22, and the second current detection unit 13 is installed on the second ground wire G2 , Used to detect the value of the ground current (ie, the second ground current) of the core 21; the first current detection unit 12 and the second current detection unit 13 may each be a current sensor (CT), but are not limited to this . The alarm unit 14 is provided on the device body 11, and the alarm unit 14 may include a warning light and a buzzer, but is not limited thereto. The processing unit 15 is arranged on the device body 11 and is electrically connected to the first current detection unit 12, the second current detection unit 13 and the alarm unit 14. The processing unit 15 can be a microprocessor or a programmable circuit, But it is not limited to this.

使用時，處理單元15能根據第一接地電流值與第二接地電流值之間的數值關係判斷是否在夾件22與鐵心21之間、鐵心21與外殼23之間或夾件22與外殼23之間，有電流異常的情形發生，造成鐵心21、夾件22或外殼23局部過熱；且當發生電流異常時，處理單元15能控制警報單元14發出一一警報信息；此警報信息可為聲音報警資訊、閃光報警資訊或振動報警信息，但不限於此。 When in use, the processing unit 15 can determine whether it is between the clamp 22 and the core 21, between the core 21 and the housing 23, or the clamp 22 and the housing 23 according to the numerical relationship between the first ground current value and the second ground current value. In the meantime, a current abnormal situation occurs, causing the iron core 21, the clip 22 or the housing 23 to locally overheat; and when the current abnormality occurs, the processing unit 15 can control the alarm unit 14 to issue a 1. Alarm information; this alarm information can be sound alarm information, flash alarm information or vibration alarm information, but is not limited to this.

值得注意的是，此警報信息提示出了異常的類型和發生異常位置。進一步而言，處理單元15會先判斷第一接地電流與第二接地電流的數值關係是否滿足以下條件，以確認異常的類型；1)第一接地電流值與第二接地電流值大致相等(如±10%以內)且兩者均大於一門檻值(如100mA)；2)第一接地電流值遠大於第一接地電流值與第二接地電流值的乘積，例如第一接地電流值為第一接地電流值與第二接地電流值的乘積的10倍以上；以及3)第二接地電流值遠大於第一接地電流值與第二接地電流值的乘積，例如第二接地電流值為第一接地電流值與第二接地電流值的乘積的10倍以上。當數值關係滿足條件1時，即確認異常類型為夾件22與鐵心21短路；當數值關係滿足條件2時，即確認異常類型為夾件22與外殼23多點接地；當數值關係滿足條件3時，即確認異常類型為鐵心21與外殼23多點接地。 It is worth noting that this alarm message indicates the type and location of the abnormality. Furthermore, the processing unit 15 will first determine whether the numerical relationship between the first ground current and the second ground current meets the following conditions to confirm the type of abnormality; 1) The first ground current value and the second ground current value are approximately equal (e.g. Within ±10%) and both are greater than a threshold value (such as 100mA); 2) The first ground current value is much greater than the product of the first ground current value and the second ground current value, for example, the first ground current value is the first 10 times or more of the product of the ground current value and the second ground current value; and 3) the second ground current value is much larger than the product of the first ground current value and the second ground current value, for example, the second ground current value is the first ground current value More than 10 times the product of the current value and the second ground current value. When the numerical relationship satisfies condition 1, it is confirmed that the abnormal type is short circuit between the clamp 22 and the core 21; when the numerical relationship meets the condition 2, it is confirmed that the abnormal type is the clamping piece 22 and the housing 23 are grounded at multiple points; when the numerical relationship meets the condition 3 When, it is confirmed that the type of abnormality is that the core 21 and the housing 23 are grounded at multiple points.

複參閱圖1，本發明的電流監測裝置1可進一步包括一第一脫線偵側單元16及一第二脫線偵側單元17，其設置於裝置本體11上，以分別確認第一接地線G1與第二接地線G2是否確實連接在輸入端111上。藉此，當第一電流偵測單元12及/或第二電流偵測單元13測不到電流值時，可以馬上找出問題所在，例如第一接地線G1及/或第二接地線G2脫線(即脫離輸入端)，或是第一電流偵測單元12及/或第二電流偵測單元13本身發生故障。 1 again, the current monitoring device 1 of the present invention may further include a first off-line detection side unit 16 and a second off-line detection side unit 17, which are arranged on the device body 11 to respectively confirm the first grounding line Whether G1 and the second ground wire G2 are indeed connected to the input terminal 111. In this way, when the first current detection unit 12 and/or the second current detection unit 13 cannot detect the current value, the problem can be found immediately, for example, the first ground wire G1 and/or the second ground wire G2 is disconnected. The line (that is, disconnected from the input terminal), or the first current detection unit 12 and/or the second current detection unit 13 themselves are faulty.

在本實施例中，第一脫線偵側單元16可包括一第一光發射器以及一第一光接收器，其中第一光接收器電性連接處理單元15，第一光發射器與第一光接收器可以相對設置，如此第一光接收器能直接接收到第一光發射器發射出的一第一光信號；第一光信號可為可見光信號或不可見光信號，但不限於此。第一接地線G1可設置在第一光信號的光路上，例如第一接地線G1 設置在第一光發射器與第一光接收器之間。實際應用時，由於第一接地線G1連接在輸入端111上，第一光信號就會被第一接地線G1阻斷，而無法傳遞到第一光接收器；相反地，在第一接地線G1脫離輸入端111的情況下，第一光信號就無法被第一接地線G1阻斷，而第一光發射器能接收到第一光信號。藉此，處理單元15能根據第一接地線G1是否存在於第一光信號的光路上，來判斷第一接地線G1與輸入端111的連接情形；一旦第一光信號未第一接地線G1阻斷，即第一接地線G1脫離了輸入端111，處理單元15便立刻控制警報單元14發出一警報信息(即脫線警報信息)；此警報信息可為聲音報警資訊、閃光報警資訊或振動報警信息，但不限於此。 In this embodiment, the first off-line detection side unit 16 may include a first optical transmitter and a first optical receiver, wherein the first optical receiver is electrically connected to the processing unit 15, and the first optical transmitter and the first optical receiver are electrically connected to the processing unit 15. An optical receiver may be arranged relatively, so that the first optical receiver can directly receive a first optical signal emitted by the first optical transmitter; the first optical signal may be a visible light signal or an invisible light signal, but is not limited to this. The first ground line G1 may be arranged on the optical path of the first optical signal, for example, the first ground line G1 It is arranged between the first light transmitter and the first light receiver. In actual application, because the first ground wire G1 is connected to the input terminal 111, the first optical signal will be blocked by the first ground wire G1 and cannot be transmitted to the first optical receiver; on the contrary, the first optical signal is blocked by the first ground wire G1. When G1 is separated from the input terminal 111, the first optical signal cannot be blocked by the first ground wire G1, and the first optical transmitter can receive the first optical signal. In this way, the processing unit 15 can determine the connection between the first ground line G1 and the input terminal 111 according to whether the first ground line G1 exists on the optical path of the first optical signal; once the first optical signal is not on the first ground line G1 Blocking, that is, the first ground wire G1 is separated from the input terminal 111, and the processing unit 15 immediately controls the alarm unit 14 to send out an alarm message (ie off-line alarm information); this alarm information can be sound alarm information, flashing alarm information or vibration Alarm information, but not limited to this.

第二脫線偵側單元17可包括一第二光發射器以及一第二光接收器，其中第二光接收器電性連接處理單元15，第二光發射器與第二光接收器可以相對設置，如此第二光接收器能直接接收到第二光發射器發射出的一第二光信號；第二光信號可為可見光信號或不可見光信號，但不限於此。第二接地線G2可設置在第二光信號的光路上，例如第二接地線G2設置在第二光發射器與第二光接收器之間。實際應用時，由於第二接地線G2連接在輸入端111上，第二光信號就會被第二接地線G2阻斷，而無法傳遞到第二光接收器；相反地，在第二接地線G2脫離輸入端111的情況下，第二光信號就無法被第二接地線G2阻斷，而第二光發射器能接收到第二光信號。藉此，處理單元15能根據第二接地線G2是否存在於第二光信號的光路上，來判斷第二接地線G2與輸入端111的連接情形；一旦第二光信號未第二接地線G2阻斷，即第二接地線G2脫離了輸入端111，處理單元15便立刻控制警報單元14發出一警報信息(即脫線警報信息)；此警報信息可為聲音報警資訊、閃光報警資訊或振動報警信息，但不限於此。 The second off-line detection side unit 17 may include a second optical transmitter and a second optical receiver, wherein the second optical receiver is electrically connected to the processing unit 15, and the second optical transmitter and the second optical receiver may be opposite to each other. It is set so that the second optical receiver can directly receive a second optical signal emitted by the second optical transmitter; the second optical signal can be a visible light signal or an invisible light signal, but is not limited to this. The second ground line G2 may be provided on the optical path of the second optical signal, for example, the second ground line G2 is provided between the second optical transmitter and the second optical receiver. In practical applications, since the second ground wire G2 is connected to the input terminal 111, the second optical signal will be blocked by the second ground wire G2 and cannot be transmitted to the second optical receiver; on the contrary, the second ground wire G2 When G2 is separated from the input terminal 111, the second optical signal cannot be blocked by the second ground line G2, and the second optical transmitter can receive the second optical signal. In this way, the processing unit 15 can determine the connection between the second ground line G2 and the input terminal 111 according to whether the second ground line G2 exists on the optical path of the second optical signal; once the second optical signal is not on the second ground line G2 Blocking, that is, the second grounding wire G2 is separated from the input terminal 111, and the processing unit 15 immediately controls the alarm unit 14 to send out an alarm message (i.e. offline alarm information); this alarm information can be sound alarm information, flashing alarm information or vibration Alarm information, but not limited to this.

複參閱圖1，本發明的電流監測裝置1可進一步包括一溫度偵測單元18，其可通過一電路板設置於裝置本體11上，以偵測第一接地線G1與第二接地線G2的溫度；實際應用時，溫度偵測單元18可包括兩個設置於電路板上的溫度傳感器，其位置分別對應第一接地線G1與第二接地線G2，但不限於此。藉此，當第一電流偵測單元12及/或第二電流偵測單元13發生故障(如因過載而燒毀)而測不到電流值時，電流監測裝置1仍能通過對電路板溫度的監測，來判斷是否有電流異常的情形發生。進一步而言，處理單元15會判斷電路板的溫度是否大於一警戒值；一旦電路板的溫度大於警戒值，處理單元15便立刻控制警報單元14發出一警報信息(即過熱警報信息)；此警報信息可為聲音報警資訊、閃光報警資訊或振動報警信息，但不限於此。 1 again, the current monitoring device 1 of the present invention may further include a temperature detection The unit 18 can be arranged on the device body 11 through a circuit board to detect the temperature of the first ground wire G1 and the second ground wire G2; in actual application, the temperature detection unit 18 can include two arranged on the circuit board The positions of the temperature sensors on the above correspond to the first ground wire G1 and the second ground wire G2, but are not limited to this. Thereby, when the first current detection unit 12 and/or the second current detection unit 13 fails (for example, burned due to overload) and the current value cannot be measured, the current monitoring device 1 can still pass the temperature of the circuit board. Monitor to determine whether there is any abnormal current. Furthermore, the processing unit 15 will determine whether the temperature of the circuit board is greater than a warning value; once the temperature of the circuit board is greater than the warning value, the processing unit 15 will immediately control the alarm unit 14 to send out an alarm message (that is, an overheating alarm message); this alarm The information can be sound alarm information, flashing alarm information or vibration alarm information, but is not limited to this.

本發明的電流監測裝置1可進一步包括一儲存單元19，用以接收第一和第二電流偵測單元12、13所測得的電流信號，並轉換成相應的接地電流值予以儲存。實際應用時，檢修人員可以從輸出端112讀取儲存於儲存單元19的歷史記錄進行分析，判斷變壓器2中的零件是否需進行要更換或維修保養。儲存單元15可為任何型態的固定或可移動隨機存取記憶體(random access memory，RAM)、唯讀記憶體(read-only memory，ROM)、快閃記憶體(flash memory)或其他類似元件或上述元件的組合。然而，本發明不以上述所舉的例子為限。 The current monitoring device 1 of the present invention may further include a storage unit 19 for receiving the current signals measured by the first and second current detecting units 12 and 13 and converting them into corresponding ground current values for storage. In actual application, the maintenance personnel can read the historical records stored in the storage unit 19 from the output terminal 112 for analysis, and determine whether the parts in the transformer 2 need to be replaced or repaired. The storage unit 15 can be any type of fixed or removable random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), flash memory (flash memory) or other similar Element or a combination of the above elements. However, the present invention is not limited to the above-mentioned examples.

參閱圖3並配合圖1及圖2所示，本發明的電流監測裝置1能實施一種變壓器的電流監測方法，其首先執行步驟S1，偵測夾件22的接地電流值(即第一接地電流值)與鐵心21的接地電流值(即第二接地電流值)。然後，執行步驟S2，根具夾件22的接地電流值與鐵心21的接地電流值的數值關係判斷是否發生過電流異常，並進一步確定過電流異常的發生位置；若發生過電流異常，則執行步驟S3，發出基於異常發生位置的警報信息。 Referring to Figure 3 and in conjunction with Figures 1 and 2, the current monitoring device 1 of the present invention can implement a transformer current monitoring method. First, step S1 is performed to detect the ground current value of the clip 22 (ie, the first ground current Value) and the ground current value of the core 21 (ie, the second ground current value). Then, step S2 is executed, the numerical relationship between the ground current value of the clamp 22 and the ground current value of the iron core 21 determines whether an overcurrent abnormality has occurred, and further determines the location of the overcurrent abnormality; if an overcurrent abnormality occurs, execute In step S3, an alarm message based on the location of the abnormality is issued.

參閱圖4並配合圖1及圖2所示，在偵測夾件22的接地電流的期間，可以進一步執行步驟S11a，判斷光信號是否被夾件22的接地線(即第一接地線)阻斷；若光信號被夾件22的接地線阻斷，則執行步驟S12a，偵測夾件22的接地線的溫度；若光信號未被夾件22的接地線阻斷，則執行步驟S13a，發出脫線警報。在本實施例中，在光信號被夾件22的接地線阻斷的情況下，可進一步執行步驟S14a，判斷電路板的溫度是否大於警戒值；若電路板的溫度大於警戒值，則執行步驟S15a，發出過熱警報。 Referring to Figure 4 and in conjunction with Figures 1 and 2, in the period of detecting the ground current of the clip 22 In the meantime, step S11a can be further executed to determine whether the optical signal is blocked by the ground wire (ie, the first ground wire) of the clip 22; if the optical signal is blocked by the ground wire of the clip 22, step S12a is executed to detect the clip The temperature of the ground wire of the member 22; if the optical signal is not blocked by the ground wire of the clip 22, step S13a is executed to issue a disconnection alarm. In this embodiment, when the optical signal is blocked by the ground wire of the clip 22, step S14a can be further performed to determine whether the temperature of the circuit board is greater than the warning value; if the temperature of the circuit board is greater than the warning value, then step S14a is executed S15a, an overheating alarm is issued.

參閱圖5並配合圖1及圖2所示，在偵測鐵心21的接地電流的期間，可以進一步執行步驟S11b，判斷光信號是否被鐵心21的接地線(即第二接地線)阻斷；若光信號被鐵心21的接地線阻斷，則執行步驟S12b，偵測鐵心21的接地線的溫度；若光信號未被鐵心21的接地線阻斷，則執行步驟S13a，發出脫線警報。在本實施例中，在光信號被鐵心21的接地線阻斷的情況下，可進一步執行步驟S14b，判斷電路板的溫度是否大於警戒值；若電路板的溫度大於警戒值，則執行步驟S15b，發出過熱警報。 Referring to FIG. 5 and in conjunction with FIGS. 1 and 2, during the detection of the ground current of the iron core 21, step S11b may be further performed to determine whether the optical signal is blocked by the ground wire (ie, the second ground wire) of the iron core 21; If the light signal is blocked by the ground wire of the iron core 21, step S12b is executed to detect the temperature of the ground wire of the iron core 21; if the light signal is not blocked by the ground wire of the iron core 21, step S13a is executed to issue a disconnection alarm. In this embodiment, when the optical signal is blocked by the ground wire of the core 21, step S14b can be further executed to determine whether the temperature of the circuit board is greater than the warning value; if the temperature of the circuit board is greater than the warning value, step S15b is executed , An overheating alarm is issued.

[實施例的有益效果] [Beneficial effects of the embodiment]

本發明的其中一有益效果在於，本發明所提供的變壓器的電流監測方法及裝置，其能通過“根據夾件與鐵心的接地電流值之間的關係判斷是否發生一電流異常，並進一步確定異常發生位置”的技術手段，使變壓器的損害降到最低。進一步而言，檢修人員能夠即時得知變壓器發生短路或多點接地，並快速找出故障點的具體位置，然後做出必要的應對措施。 One of the beneficial effects of the present invention is that the transformer current monitoring method and device provided by the present invention can determine whether a current abnormality occurs according to the relationship between the clamp and the ground current value of the iron core, and further determine the abnormality. The technical means of "location of occurrence" minimizes the damage to the transformer. Furthermore, maintenance personnel can instantly know that the transformer is short-circuited or grounded at multiple points, and quickly find out the specific location of the fault point, and then make necessary countermeasures.

以上所公開的內容僅為本發明的優選可行實施例，並非因此侷限本發明的申請專利範圍，所以凡是運用本發明說明書及圖式內容所做的等效技術變化，均包含於本發明的申請專利範圍內。 The content disclosed above is only the preferred and feasible embodiments of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

S1-S3:方法步驟 S1-S3: method steps

Claims

一種變壓器的電流監測方法，所述變壓器包括一鐵心、一設置在所述鐵心外側的夾件以及一圍繞所述鐵心與所述夾件的外殼，所述變壓器的電流監測方法包括：偵測所述夾件的一第一接地電流值與所述鐵心的一第二接地電流值；根據所述第一接地電流值與所述第二接地電流值之間的一數值關係判斷是否發生一電流異常，並進一步確定所述電流異常是發生在所述夾件與所述鐵心之間、所述鐵心與所述外殼之間或所述夾件與所述外殼之間；以及若發生電流異常，則發出基於異常發生位置的一電流異常警報信息；其中，所述鐵心的所述第二接地電流通過一接地線流向大地，且所述接地線設置在一光信號的光路上；其中，在偵測所述第二接地電流值的期間，所述變壓器的電流監測方法還包括：判斷所述光信號是否被所述接地線阻斷；以及若所述光信號未被所述第二接地線阻斷，則發出一脫線警報信息。 A method for current monitoring of a transformer. The transformer includes an iron core, a clamp arranged on the outside of the iron core, and a shell surrounding the iron core and the clamp. The current monitoring method of the transformer includes: detecting the A first ground current value of the clip and a second ground current value of the iron core; judging whether an abnormal current occurs according to a numerical relationship between the first ground current value and the second ground current value , And further determine that the current abnormality occurs between the clamp and the core, between the core and the housing, or between the clamp and the housing; and if the current abnormality occurs, then A current abnormality alarm message based on the location of the abnormality is issued; wherein the second ground current of the iron core flows to the ground through a ground wire, and the ground wire is arranged on an optical path of an optical signal; wherein, in the detection During the second ground current value, the transformer current monitoring method further includes: determining whether the optical signal is blocked by the ground wire; and if the optical signal is not blocked by the second ground wire , An offline alarm message is issued.

如請求項1所述的變壓器的電流監測方法，其中，當所述數值關係為所述第一接地電流值與所述第二接地電流值大致相等，且兩者均大於一門檻值時，確定所述電流異常是發生在所述夾件與所述鐵心之間。 The transformer current monitoring method according to claim 1, wherein when the numerical relationship is that the first ground current value and the second ground current value are approximately equal, and both are greater than a threshold value, it is determined The current abnormality occurs between the clamp and the iron core.

如請求項1所述的變壓器的電流監測方法，其中，所述夾件的所述第一接地電流通過另一接地線流向大地，所述另一接地線設置在另一光信號的光路上；其中，在偵測所述第一接地電流值的期間，所述變壓器的電流監測方法還包括：判斷所述另一光信號是否被所述第一接地線阻斷；以及若所述另一光信號未被所述第一接地線阻斷，則發出另一脫線警報信息。 The current monitoring method of a transformer according to claim 1, wherein the clamping piece The first ground current flows to the ground through another ground wire, and the other ground wire is arranged on the optical path of another optical signal; wherein, during the detection of the first ground current value, the current of the transformer The monitoring method further includes: judging whether the another optical signal is blocked by the first ground wire; and if the another optical signal is not blocked by the first ground wire, sending another disconnection alarm message .

如請求項3所述的變壓器的電流監測方法，其還包括：若所述另一光信號被所述第一接地線阻斷，則偵測一電路板的溫度，並判斷所述電路板的溫度是否大於一警戒值；以及若所述電路板的溫度大於所述警戒值，則發出一溫度警報信息。 The current monitoring method of the transformer according to claim 3, further comprising: if the another optical signal is blocked by the first ground wire, detecting the temperature of a circuit board, and judging the temperature of the circuit board Whether the temperature is greater than a warning value; and if the temperature of the circuit board is greater than the warning value, a temperature warning message is issued.

如請求項1所述的變壓器的電流監測方法，其還包括：若所述第二光信號被所述第二接地線阻斷，則偵測一電路板的溫度，並判斷所述電路板的溫度是否大於一警戒值；以及若所述電路板的溫度大於所述警戒值，則發出一溫度警報信息。 The current monitoring method of the transformer according to claim 1, further comprising: if the second optical signal is blocked by the second ground wire, detecting the temperature of a circuit board, and judging the temperature of the circuit board Whether the temperature is greater than a warning value; and if the temperature of the circuit board is greater than the warning value, a temperature warning message is issued.

一種變壓器的電流監測裝置，所述變壓器包括一鐵心、一設置在所述鐵心外側的夾件以及一圍繞所述鐵心與所述夾件的外殼，所述電流監測裝置包括：一裝置本體，其具有一輸入端以及一輸出端，所述輸入端通過一第一接地線電性連接所述夾件，所述輸出端通過一第二接地線電性連接所述鐵心；一第一電流偵測單元，其安裝在所述第一接地線上，用以偵測所述夾件的一第一接地電流值；一第二電流偵測單元，其安裝在所述第二接地線上，用以偵測所述鐵心的一第二接地電流值，其中所述第二接地電流通過一接地線流向大地，且所述接地線設置在一光信號的光路上；一警報單元，其設置在所述裝置本體上；以及一處理單元，其設置在所述裝置本體上，並電性連接所述第一電流偵測單元、第二電流偵測單元與所述警報單元；其中，所述處理單元能根據所述第一接地電流值與所述第二接地電流值之間的一數值關係判斷是否發生一電流異常，並進一步確定所述電流異常是發生在所述夾件與所述鐵心之間、所述鐵心與所述外殼之間或所述夾件與所述外殼之間；其中，當發生所述電流異常時，所述處理單元控制所述警報單元發出基於異常發生位置的一電流異常警報信息；其中，在所述第二電流偵測單元偵測所述第二接地電流值的期間，所述處理單元能判斷所述光信號是否被所述接地線阻斷；其中，若所述光信號未被所述第二接地線阻斷，則所述處理單元控制所述警報單元發出一脫線警報信息。 A current monitoring device for a transformer. The transformer includes an iron core, a clamping piece arranged outside the iron core, and a shell surrounding the iron core and the clamping piece. The current monitoring device includes: a device body, which It has an input terminal and an output terminal, the input terminal is electrically connected to the clip through a first ground wire, and the output terminal is electrically connected to the iron core through a second ground wire; a first current detection Unit, which is installed on the first ground wire for detecting A first ground current value of the clip; a second current detection unit installed on the second ground wire for detecting a second ground current value of the iron core, wherein the second The ground current flows to the earth through a ground wire, and the ground wire is arranged on a light path of an optical signal; an alarm unit is arranged on the device body; and a processing unit is arranged on the device body, And electrically connected to the first current detection unit, the second current detection unit, and the alarm unit; wherein, the processing unit can be based on the difference between the first ground current value and the second ground current value Determine whether a current abnormality occurs, and further determine whether the current abnormality occurs between the clip and the iron core, between the iron core and the housing, or between the clip and the housing Wherein, when the current abnormality occurs, the processing unit controls the alarm unit to issue a current abnormality alarm information based on the location of the abnormality; wherein the second current detection unit detects the first During the period of the second ground current value, the processing unit can determine whether the optical signal is blocked by the ground wire; wherein, if the optical signal is not blocked by the second ground wire, the processing unit controls The alarm unit sends out an offline alarm message.

如請求項6所述的變壓器的電流監測裝置，其中，當所述處理單元確定所述數值關係為所述第一接地電流值與所述第二接地電流值大致相等且兩者均大於一門檻值時，即控制所述警報單元發出所述第一警報信息，以提示所述電流異常是發生在所述夾件與所述鐵心之間。 The current monitoring device for a transformer according to claim 6, wherein when the processing unit determines that the numerical relationship is that the first ground current value and the second ground current value are approximately equal, and both are greater than a threshold Value, that is, the alarm unit is controlled to send out the first alarm message to prompt that the current abnormality occurs between the clamp and the iron core.