201220631 六、發明說明： 【發明所屬之技術領域】 [〇〇〇1] 本發明涉及一種直流供電系統故障偵測保護電路， 尤指一種可用於直流供電系統運作中進行各迴路的線上 漏電檢測之電路。 【先前技術】 [0002]201220631 VI. Description of the invention: [Technical field of invention] [〇〇〇1] The present invention relates to a fault detection and protection circuit for a DC power supply system, and more particularly to an on-line leakage detection of each circuit that can be used in the operation of a DC power supply system. Circuit. [Prior Art] [0002]
[0003] Ο 現今直流供電系統有採接地方式及非直接接地方式 ，採接地方式供電者如當系統内的電池組有外殼破裂、 漏液時故障電流會經接地端回流至直流電源侧，易形成 大電流引發產生電氣火歎的爲機，另錢漏電流亦會經地 網對其它地下的金屬管路造成電氧'腐蝕，影響其它金屬 管路的運轉安全。 故絕大多數用戶採用非直接接地方式的供電架構， 以維持高可靠的連續供電品質，請參考第〗圖所示，如果 供電系統9所連結的分路負載93，發生單極性絕緣劣化導 致接地故障94，供電系統9之漏電警報器只能量測由供電 系統9正端與大地間的電壓差，或負端與大地間的電壓差 來檢測出該供電系統9發生接地故障94並提供告警訊號， 然此方式得停機並對每一分路負載93進行絕緣檢測才能 知道是哪個分路負載93發生接地故障94 ,而無法達到線 上即時檢測告警之功能；請參考第2圖所示，倘若之前已 發生接地故障94未清除前，於運作中某一分路負載93又 不慎發生另一極性絕緣劣化導致接地故障94，漏電流則 可經不同極性的接地故障94路徑回流至供電系統9，遂造 成已接地故障94之分路負載93的漏電流感測器95檢 099137579 表單編號A0101 第3頁/共29頁 0992065486-0 201220631 電流異常，而引起所有已發生接地故障94的其它分路負 載93之斷路器96同時截止導通停止供電，造成數個分路 負載93用電設備的停擺。請參考第3圖所示，若發生單極 性接地故障94，且若其它線路較長之健全分路負載93， 因其線路對地的雜散電容98較大，容易造成其它健全分 路負載93之雜散電容98放電，並經接地故障94路徑回流 至雜散電容98，導致健全分路負載93的漏電流感測器95 誤判，造成該健全分路負載93的誤告警。 [0004] [0005] 請參考第4圖所示，亦有另一檢測架構，於供電系統 9源頭正負端皆個別外加電阻器接地97，並使用高感度的 漏電流感測器95來檢測漏電流，但當分路負載93發生接 地故障94時，漏電流可由地網經電阻器接地97回流至供 電系統9，使漏電流感測器95得以檢測出該分路負載93的 接地故障94異常。但若其它線路較長的分路負載93因其 對地雜散電容98大，易造成其雜散電容98會經接地故障 94回流至雜散電容98，導致健全分路負載93的漏電流感 測器9 5誤判。 【發明内容】 本發明一種直流供電系統故障偵測保護電路，係為 克服現有當發生接地故障時無法提供高感度的檢測告警 ，且易造成其它健全回路的漏電流檢知器誤判、誤告警 之缺點。 因此，本發明之目的，即在提供一漏電檢測電路， 該漏電檢測電路包括有兩斷電元件、兩單向導通器、一 漏電流檢知器及一電壓暫態補償器；該斷電元件分別設 099137579 表單編號A0101 第4頁/共29頁 0992065486-0 [0006] 201220631 Ο [0007][0003] Ο Today's DC power supply system has grounding method and non-direct grounding method. If the battery pack in the system has a housing rupture and leakage, the fault current will flow back to the DC power supply side through the grounding terminal. The formation of a large current causes the electrical sigh to be a machine, and the other leakage current will also cause electrical oxygen corrosion to other underground metal pipelines through the ground grid, affecting the safe operation of other metal pipelines. Therefore, most users use a non-direct grounding power supply architecture to maintain high-reliability continuous power quality. Please refer to Figure 〖If the power supply system 9 is connected to the shunt load 93, unipolar insulation degradation causes grounding. Fault 94, the leakage alarm of the power supply system 9 can only measure the voltage difference between the positive terminal and the ground of the power supply system 9, or the voltage difference between the negative terminal and the ground to detect that the power supply system 9 has a ground fault 94 and provide an alarm. Signal, however, this mode has to stop and conduct insulation detection for each shunt load 93 to know which shunt load 93 has a ground fault 94, and can not achieve the function of online detection of alarms; please refer to Figure 2, if Before the ground fault 94 has not been cleared before, in the operation, one of the shunt loads 93 inadvertently causes another polarity insulation degradation to cause the ground fault 94, and the leakage current can be returned to the power supply system through the ground fault 94 of different polarity. , 漏 caused by the ground fault 94 of the shunt load 94 of the leakage current sensor 95 099137579 Form No. A0101 Page 3 / 29 pages 0992065486-0 201220631 The current is abnormal, and all the circuit breakers 96 of the other shunt load 93 that have caused the ground fault 94 are turned off at the same time to stop the power supply, causing the shutdown of several shunting loads 93. Please refer to Figure 3, if a unipolar ground fault 94 occurs, and if the other shunt load 93 is longer, the stray capacitance 98 of the line to the ground is large, which is likely to cause other healthy shunt loads 93. The stray capacitance 98 is discharged and returned to the stray capacitance 98 via the ground fault 94 path, causing the leakage current sensor 95 of the healthy shunt load 93 to misjudge, causing a false alarm of the healthy shunt load 93. [0004] Please refer to FIG. 4, there is another detection architecture, in which the resistor grounding 97 is applied to the positive and negative terminals of the power supply system 9 respectively, and the high-sensitivity leakage current sensor 95 is used to detect the leakage current. However, when the ground fault 94 occurs in the shunt load 93, the leakage current can be returned from the ground grid via the resistor ground 97 to the power supply system 9, so that the leakage current sensor 95 can detect that the ground fault 94 of the shunt load 93 is abnormal. However, if the long-distance shunt load 93 of other lines is large due to its large stray capacitance 98, it is easy to cause its stray capacitance 98 to return to the stray capacitance 98 via the ground fault 94, resulting in leakage current sensing of the healthy shunt load 93. 9 5 misjudged. SUMMARY OF THE INVENTION A fault detection and protection circuit for a DC power supply system overcomes the problem that a high-sensitivity detection alarm cannot be provided when a ground fault occurs, and the leakage current detector of other sound circuits is misjudged or false alarmed. Disadvantages. Therefore, an object of the present invention is to provide a leakage detecting circuit including two power-off elements, two single-conductors, a leakage current detector, and a voltage transient compensator; Set 099137579 Form No. A0101 Page 4 / Total 29 Page 0992065486-0 [0006] 201220631 Ο [0007]
於供電系統之迴路的正端及負端，可截止該迴路之供電 -亥早向導通器設於斷電元件與負載之間，分別連接於 ’、電系統之②路的正端及負端，可隔離其它迴路與該迴 路因絕緣劣化而引起漏電流流通，該漏電流檢知器机於 迴路的單向導通器與負載之間，以感測該迴路漏電^ ’並藉與漏電流檢知科接之監控模組，提供漏電異常 的告警訊息或控制斷電元件截止供電，該電壓暫態補償 器設於漏電流檢知器之-侧，並配合單向導通器以抑制 =它迴路之負·生短路輯_該迴路的擾動並適時 提供儲能電力持續鮮，卿兼誠電紐知器的高感 度檢測及避免其它健全迴路的誤停電。 T G [0008] 本發明在改良現有於供電系統因絕緣劣化產生接地 ，易造成各迴路間的漏電流檢知器誤動作之問題；其利 用各迴路間設置的單向導通器，可使健全迴路不受其它 迴路之漏電流影響漏電流檢知器的感測，並搭配電壓暫 4補償器提供之儲存電力，於接地故障時提供漏電流的 回流路徑，以達到漏電流檢知器高感度檢測之目的。 本發明一種直流供電系統故障偵測保護電路之電壓 暫態補償器，其包括有兩儲能元件相互争聯且串聯端設 有一接地，另兩端分別連接電阻器並將其連接於迴路的 正端及負端形成充電迴路，供電運作中儲能元件可經電 阻器進行充電儲存電能，兩單向放電器分別並聯於電阻 器之一側，當供電系統發生短暫低電壓時，可讓儲能元 件經平向放電器進行放電供應負载，對該迴路有抵抗暫 態低電壓之保護作用。 099137579 表單編珑Α0101 第5賓/共29頁 0992065486-0 201220631 [0009] 綜上所述，一種直流供電系統故障偵測保護電路， 具下列優點： [0010] 1. 單向導通器可有效隔離健全迴路的雜散電容放電回 流至其它接地故障的迴路，有效避免健全迴路之漏 電流檢知器的誤動作。 2. 可防止於斷電元件與單向導通器因人為因素導致電 源極性反接，造成送電時損傷到所連結的負載。 3. 電壓暫態補償器可適時提供儲能電力，與單向導通 器搭配，更可達到抵抗供電系統之暫態低電壓的功 效。 【實施方式】 [0011] 請參照第5及6圖所示，本發明之直流供電系統故障 偵測保護電路係為非接地供電系統1的漏電檢測電路2， 其包括有： [0012] 兩斷電元件21係分別設於供電系統1之迴路11的正端 及負端，可截止迴路11之供電。； [0013] 兩單向導通器22，該單向導通器22設於斷電元件21 與負載12之間，分別連接於供電系統1之迴路11的正端及 負端，可供隔離其它迴路11與該迴路11因絕緣劣化而引 起的漏電流流通。 _ [0014] 一漏電流檢知器23係設於供電系統1之迴路11的單向 導通器22與負載12之間，用於感測該迴路11漏電流值， 並可藉與漏電流檢知器23連接之監控模組231，提供漏電 異常的告警訊息和量測之漏電流值供記錄分析之用。 099137579 表單編號A0101 第6頁/共29頁 0992065486-0 201220631 [0015] 電壓暫態補償器24，該電壓暫態補償器24設於漏 、•·檢知态23之一側，與單向導通器。配合可抑制其它 迴^11之負載12因短路故障對該迴路μ擾動並可提供 堵月力，該電壓暫態補償器24由兩儲能元件241、兩電 阻器242及兩單向放電器243組成；該儲能元件241相互 串聯，於串聯端24U設有一接地2412，其另兩端分別連 接電阻器242,並將其連接於迴路u的正端及負端形成 ❹ 充電迴路，供電運作中儲能元件241，可經電阻器242進 仃充電儲存電能；該單向放電器243分別並聯於電阻器 42之側，可於供電彝霉〗發生短暫低電壓時，讓儲能 元件241隨即經單向放電器243進行放電供應負載12，對 該迴路11有抵抗暫態低電壓之保護作用。請參照第7圖所 示，該電壓暫態補償器24於運作時，供電系統丨供應負載 U用電，且同時經電阻器242對儲能元件241充電；若於 Ο [0016] k路11發生正或負端之一線絕緣劣化接地1 3，漏電流 可經電壓暫態補償器24之接地2412流回，儲能元件241 隨即經單向放電器2.4.3放電供應負載12，使漏電流檢知器 23順利檢測出迴路π之電流差值的變化，並達到高减度 檢測之目的。 請參照第5及6圖所示’本發明之實施例為非接地供 電系統1以三個迴路11為例，各迴路11都設有上述之漏電 檢測電路2，漏電檢測電路2之單向導通器22可隔離各迴 路11間，發生接地的漏電流回流，防止其它健全迴路n 的漏電流檢知器23誤動作’亦可防止健全迴路11的電壓 暫態補償器24於放電過程中又逆流到已故障的迴路u ; 099137579 表單編號A0101 第7買/共29頁 0992065486-0 201220631 供電運作中迴路11若發生絕緣劣化接地13時，漏電流可 經地網流回至該迴路11的電壓暫態補償器24之接地241 2 ，該電壓暫態補償器24之儲能元件241可經單向放電器 243進行放電，使經漏電流檢知器23感測正端及負端通過 之電流值差值變化，另該漏電流檢知器2 3亦可透過監控 模組231，發出告警訊息或控制斷電元件21截止對該迴路 11的供電，讓人員即時得知該迴路11已發生絕緣劣化的 異常。請參照第8圖所示，供電系統1運轉供電過程中若 其一迴路11之負載12發生短路事故，需截止該迴路11之 斷電元件21以停止對該負載12之供電，然於斷電元件21 未截止前，其它健全迴路11仍可藉電壓暫態補償器24持 續供電，以抵抗該短路事故之負載12所造成的供電系統1 的短暫低電壓。 [0017] [0018] [0019] 請參照第9圖所示，本發明另一實施例為供電系統1 之正端及負端各設有電阻接地14之漏電檢測電路2，其包 括有： 兩斷電元件21係分別設於供電系統1之迴路11的正端 及負端，可適時截止迴路11之供電。 兩單向導通器22，該單向導通器22設於斷電元件21 與負載12之間，分別連接於供電系統1之迴路11的正端及 負端，供隔離其它迴路11與該迴路11因絕緣劣化所引起 的漏電流流通。 一漏電流檢知器23係設於供電系統1之迴路11的單向 導通器22與負載12之間，用於感測該迴路11漏電流值， 099137579 表單編號A0101 第8頁/共29頁 0992065486-0 [0020] 201220631 並可藉與漏電流檢知器23所連接之監控模組231，提供漏 電異常的告警訊息和所量測檢出的漏電流值供記錄分析 之用。 [0021] Ο 〇 本發明另一實施例各迴路11均設有漏電檢測電路2， 運作中若某一迴路11發生絕緣劣化接地13，可藉單向導 通器22的隔離作用，以避免其它線路較長之健全迴路u 的雜散電容19放電，造成健全迴路π的漏電流檢知器23 發生誤判之情況；請參照第1 〇圖所示，本發明另一實施 例漏電檢測電路2更可加入一電壓暫態補償器24，該電壓 暫態補償器24設於漏_電流檢知;赛2_3之一.倒，..與單向導通 器22配合可抑制其它迴路11之負載12因短路故障對該迴 路11的擾動，並可提供儲能電力以抵抗供電系統丨的短暫 低電壓；該電壓暫態補償器24由兩儲能元件241、兩電阻 器242及兩單向放電器243組成；該儲能元件241相互串 聯，於串聯端2411設有一接地2412，另其,兩端分別連接 電阻器242,並將其連接於該迴路u的正端及負端形成 充電迴路，該單向放電器243分別並聯於電阻器242之一 侧，可於供電系統1短暫低電壓時，讓儲能元件241經單 向放電器243進行放電供應負載12。若發生供電系統1電 阻接地14故障仍可藉電壓暫態補償器24之接地2412順利 引導漏電流，讓漏電流檢知器23仍可檢測出絕緣劣化接 地13之異常。 請參照第11圖所示，本發明之漏電檢測電路2可應用 於供電系統1之正端接地15,其該實施例兩斷電元件21 係分別設於供電系統1之迴路U的正端及負端，一單向導 099137579 表單編號A0101 第9頁/共29頁 0992065486-0 [0022] 201220631 通器22連接於供電系統！之迴路 * — 器23係設於供電系統】之 、負端’―漏電流檢知 12-? Η · * 硌11的單向導通器22詉 U之間，運作時其中一迴路 〜負載 時，其健全迴路單 X絕緣劣化的接地異常 1藉早向導通器22隔離因絕綾n 13之漏電流，以避免健全迴路 、'、、接地 誤判H本發^漏料—糕檢知_發生 檢測電路2應用於正端接itM ς 之供電系統1更可加入 ^接地15 站产戛暫態補償器24，該電壓暫能 補乜為24設於漏電流檢知器 〇 暫心 之—側’與單向導诵5|91 配s可抑制短路故障迴路u ° ^ g 之負載12因對該迴路1丨的擾 =—能電力;該魏 器24⑽電㈣242及—單向玫電剛組成；該電阻 1§ 242與儲能元件241相互串 Λ11 ^ ¥聯，且連接於供電系統1之迴 的正端及負端形成充電迴路，該單向放電器243並聯 於電阻以42之—側；可於供電系統m迴路叫短路故 ^造成低電壓時，其讀全迴路11之儲能元件川經單向 放電器243進行放電供應負制、讓細2具有抵抗短暫 低電壓的擾動；贫供雷& ， 该供電糸統1之正端接地15可另設有-電 阻器17。 [0023] 請參照第12圖所示，上述之實施例供電系統i若為負 端接地16,則將單向導通器22連接於供電系⑹之迴路 11的正端，亦可達到上述之實施例之功能，係為另一應 用方法’該供電系統1之負端接地16可另設有一電阻器17 [0024] 睛參照第6、1〇、11及12圖所示，综上述各實施例 單向導通器22具單方向導通之特性，可有效隔離絕緣劣 之 099137579 表單編號A0101 第10頁/共29頁 0992065486-0 201220631 [0025] Ο [0026] [0027] [0028] ❹ [0029] [0030] [0031] [0032] 化接地13之漏電流的回流，避免各健全迴路丨丨之漏電流 檢知器23的誤判；單向導通器22又可防止斷電元件21二 單向導通器22於引接配線時，因人為因素導致極性反接 ，造成送電時損傷到所連結的負載丨2 ;且單向導通器22 與電壓暫態補償器24搭配，還可讓其它健全迴路抵抗暫 態低電壓之功效。 請參照第13圖所示，本發明之漏電檢測電路2的單向 導通器22，可為數單向導通元件221組成，以避免單一單 向導通元件221失效造成單向導通器22的隔離功能失效， 然單向放電器243亦可運用數單向放電元#2431組成。 【圖式簡單說明】 第1圖：習知非接地系統單極性絕緣劣化接地故障電路圖 〇 第2圖：習知非接地系統絕緣劣化接地故障漏電流流向圖 〇 第3圖：習知非接地系統單極性絕緣劣化接地故障時雜散 電容放電的流向圖。 第4圖··習知應用電阻接地檢測其雜散電容放電的流向圖 〇 第5圖：本發明非接地供電系統電路圖。 第6圖：本發明非接地供電系統絕緣劣化接地漏電流的流 向圖。 第7圖：本發明電壓暫態補償器運作圖。 099137579 表單編號Α0101 第Π頁/共29頁 0992065486-0 201220631 [0033] 弟8圖·本發明蕾 圖0 %壓暫態補 償器玫電抵抗暫態低電壓運作 []圖本&明電随接地供電系統絕緣劣化接地漏電流的 流向圖 [0035] 第1 0圖：本發明 圖。 電阻接地供電系統電壓暫態補償 器運作 [0036] [0037] [0038] 第11圖：本發明正端接地供電系統運作圖。 第12圖：本發明負端接地供電系統運作圖。 第13圖：本發明單向導通器及單向放電器由數w且成 應用圖。 【主要元件符號說明】 099137579 [0039] 1.供電系統 11.迴路 [0040] 12.負載 13.絕緣劣化接地 [0041] 14.電阻接地 1 5.正端接地 [0042] 16.負端接地 17,電阻器 [0043] 19.雜散電容 2.漏電檢測電路 [0044] 21.斷電元件 22.單向導通器 [0045] 221.單向導通元件 2 3.漏電流檢知器 [0046] 231.監控模組 2 4.電壓暫態補償- [0047] 241.儲能元件 2 411.串聯端 [0048] 2412.接地 242.電阻器 Γ9 表單編號Α0101 第 12頁/共29真 0992065486-0 201220631 [0049] 243.單向放電器 2431.單向放電天 [0050] 9.供電系統 93.分路負載 [0051] 94.接地故障 9 5.漏電流感測器 [0052] 96.斷路器 97.電阻器接地 [0053] 98.雜散電容 Ο Ο 099137579 表單編號Α0101 第13頁/共29頁 0992065486-0At the positive and negative ends of the circuit of the power supply system, the power supply of the circuit can be cut off - the early morning communication device is disposed between the power-off element and the load, and is respectively connected to the positive and negative ends of the two paths of the electric system. The other circuit can be isolated and the leakage current is caused by the insulation degradation. The leakage current detector is between the single-conductor of the circuit and the load to sense the leakage of the circuit and to detect the leakage current. The monitoring module of Zhike connects to provide the alarm message of abnormal leakage or control the power-off of the power-off component. The voltage transient compensator is set on the side of the leakage current detector and cooperates with the single-conductor to suppress = its circuit. The negative and short circuit series _ the disturbance of the circuit and timely supply of energy storage power is still fresh, and the high sensitivity detection of the Qingcheng Xinzhi device and the avoidance of other healthy circuits. TG [0008] The present invention improves the existing grounding caused by insulation degradation in the power supply system, and is liable to cause a malfunction of the leakage current detector between the circuits; and the single-directional conduction device provided between the circuits can make the sound circuit not complete. The leakage current of the other circuit affects the sensing of the leakage current detector, and is matched with the stored power provided by the voltage temporary 4 compensator to provide a return path of leakage current during the ground fault to achieve high sensitivity detection of the leakage current detector. purpose. The invention relates to a voltage transient compensator for a fault detection and protection circuit of a DC power supply system, which comprises two energy storage elements contending with each other and a grounding end provided with a grounding, and the other ends respectively connecting the resistors and connecting them to the circuit The charging circuit is formed at the terminal end and the negative terminal. The energy storage component can be charged and stored by the resistor during the power supply operation, and the two unidirectional dischargers are respectively connected in parallel to one side of the resistor. When the power supply system experiences a short low voltage, the energy storage can be performed. The component is subjected to a discharge supply load via a flat discharger, and the circuit is protected against transient low voltage. 099137579 Form Compilation 0101 5th/Total 29 Page 0992065486-0 201220631 [0009] In summary, a DC power supply system fault detection and protection circuit has the following advantages: [0010] 1. Single-conductor can effectively isolate The stray capacitance of the sound circuit is discharged back to the circuit of other ground faults, effectively avoiding the malfunction of the leakage current detector of the sound circuit. 2. It can prevent the power supply component and the single-conductor from being reversed due to human factors due to human factors, causing damage to the connected load during power transmission. 3. The voltage transient compensator can provide energy storage power in time, and it can be matched with the single-conductor to achieve the effect of resisting the transient low voltage of the power supply system. [Embodiment] Referring to Figures 5 and 6, the fault detection and protection circuit of the DC power supply system of the present invention is the leakage detection circuit 2 of the ungrounded power supply system 1, which includes: [0012] The electrical components 21 are respectively disposed at the positive end and the negative end of the loop 11 of the power supply system 1, and can cut off the power supply of the loop 11. [0013] Two single-conductor 22, the single-conductor 22 is disposed between the power-off element 21 and the load 12, and is respectively connected to the positive end and the negative end of the circuit 11 of the power supply system 1, so as to isolate other circuits. 11 and the circuit 11 are caused to leak due to insulation degradation. [0014] A leakage current detector 23 is provided between the single-conductor 22 of the circuit 11 of the power supply system 1 and the load 12 for sensing the leakage current value of the circuit 11, and can be used for leakage current detection. The monitoring module 231 connected to the controller 23 provides an alarm message of leakage abnormality and a measured leakage current value for recording analysis. 099137579 Form No. A0101 Page 6 of 29 0992065486-0 201220631 [0015] A voltage transient compensator 24 is provided on one side of the leakage, •·detection state 23, and is unidirectionally connected. Device. The combination can suppress the load 12 of the other circuit 11 and disturb the circuit μ due to the short circuit fault, and can provide the moon blocking force. The voltage transient compensator 24 is composed of two energy storage elements 241, two resistors 242 and two one-way dischargers 243. The energy storage components 241 are connected in series with each other. A grounding terminal 2412 is disposed at the series end 24U, and the other ends are respectively connected with the resistor 242, and are connected to the positive end and the negative end of the loop u to form a charging circuit. The energy storage component 241 can be charged and stored by the resistor 242. The unidirectional discharger 243 is respectively connected in parallel with the side of the resistor 42 to allow the energy storage component 241 to pass through when the power supply is temporarily low. The one-way arrester 243 performs a discharge supply load 12, and the circuit 11 is protected against transient low voltages. Referring to FIG. 7, when the voltage transient compensator 24 is in operation, the power supply system 丨 supplies the load U with power, and simultaneously charges the energy storage element 241 via the resistor 242; if Ο [0016] k road 11 A positive or negative terminal line insulation degradation grounding 13 occurs, the leakage current can flow back through the ground 2412 of the voltage transient compensator 24, and the energy storage element 241 is then discharged through the unidirectional discharge device 2.4.3 to supply the load 12, so that the leakage current The detector 23 smoothly detects the change in the current difference of the circuit π and achieves the purpose of high-decrease detection. Referring to Figures 5 and 6, the embodiment of the present invention is a non-grounded power supply system 1 taking three circuits 11 as an example. Each circuit 11 is provided with the above-mentioned leakage detecting circuit 2, and the single-pass of the leakage detecting circuit 2 The device 22 can isolate the loops 11 and cause leakage current backflow to prevent the leakage current detector 23 of the other sound circuit n from malfunctioning. The voltage transient compensator 24 of the sound circuit 11 can also be prevented from flowing back to the discharge process. Faulty circuit u; 099137579 Form No. A0101 No. 7 Buy/Total 29 Page 0992065486-0 201220631 When the circuit 11 in the power supply operation has insulation degradation ground 13, the leakage current can flow back to the voltage transient of the circuit 11 through the ground network. The grounding electrode 241 2 of the compensator 24, the energy storage component 241 of the voltage transient compensator 24 can be discharged through the unidirectional discharger 243, so that the current value difference between the positive terminal and the negative terminal is sensed by the leakage current detector 23. The value of the leakage current detector 23 can also send an alarm message through the monitoring module 231 or control the power-off element 21 to cut off the power supply to the circuit 11, so that the personnel can immediately know that the circuit 11 has been insulated and deteriorated. abnormal. Referring to FIG. 8 , if the load 12 of the primary circuit 11 is short-circuited during the operation of the power supply system 1 , the power-off element 21 of the circuit 11 is required to stop the power supply to the load 12, but the power is turned off. Before the component 21 is not turned off, the other sound circuits 11 can still be continuously powered by the voltage transient compensator 24 to resist the transient low voltage of the power supply system 1 caused by the load 12 of the short circuit accident. [0019] Referring to FIG. 9, another embodiment of the present invention provides a leakage detecting circuit 2 of a resistor ground 14 at a positive end and a negative end of the power supply system 1, which includes: The power-off elements 21 are respectively disposed at the positive end and the negative end of the circuit 11 of the power supply system 1, and can supply power to the circuit 11 in a timely manner. Two single-way relays 22 are disposed between the power-off element 21 and the load 12, and are respectively connected to the positive end and the negative end of the circuit 11 of the power supply system 1 for isolating the other circuits 11 and the circuit 11 Leakage current due to insulation degradation. A leakage current detector 23 is provided between the single-conductor 22 of the circuit 11 of the power supply system 1 and the load 12 for sensing the leakage current value of the circuit 11, 099137579 Form No. A0101 Page 8 of 29 0992065486-0 [0020] 201220631 and the monitoring module 231 connected to the leakage current detector 23 can provide an alarm message of leakage abnormality and a measured leakage current value for recording analysis. [0021] In another embodiment of the present invention, each circuit 11 is provided with a leakage detecting circuit 2. In the operation, if a certain circuit 11 has an insulation degradation ground 13, the isolation of the single-conductor 22 can be used to avoid other lines. When the stray capacitance 19 of the long circuit u is discharged, the leakage current detector 23 of the sound circuit π is misjudged. Referring to FIG. 1 , the leakage detecting circuit 2 of another embodiment of the present invention may further A voltage transient compensator 24 is added, and the voltage transient compensator 24 is set in the leakage current detection; one of the races 2_3. Inverted, the combination with the single-conductor 22 can suppress the load 12 of the other circuit 11 from being short-circuited. The disturbance of the circuit 11 is faulty, and the stored energy can be supplied to resist the transient low voltage of the power supply system. The voltage transient compensator 24 is composed of two energy storage components 241, two resistors 242 and two unidirectional dischargers 243. The energy storage elements 241 are connected in series with each other, and a grounding 2412 is disposed at the series end 2411. Further, the two ends are respectively connected with the resistor 242, and connected to the positive end and the negative end of the circuit u to form a charging circuit. The arresters 243 are respectively connected in parallel to the resistor 242 On one side, the energy storage element 241 can be discharged to the load 12 via the one-way discharger 243 when the power supply system 1 is briefly under a low voltage. If the fault occurs in the power supply system 1 resistance ground 14 , the leakage current can be smoothly guided by the ground 2412 of the voltage transient compensator 24, so that the leakage current detector 23 can still detect the abnormality of the insulation degradation ground 13 . Referring to FIG. 11, the leakage detecting circuit 2 of the present invention can be applied to the positive terminal ground 15 of the power supply system 1. In this embodiment, the two power-off elements 21 are respectively disposed at the positive end of the circuit U of the power supply system 1 and Negative, a single guide 099137579 Form No. A0101 Page 9 / Total 29 Page 0992065486-0 [0022] 201220631 Tong 22 is connected to the power supply system! The circuit of the circuit is set in the power supply system, the negative terminal '-leakage current detection 12-? Η · * 硌11 between the single-conductor 22詉U, one of the circuits to the load when operating, The grounding abnormality of the sound circuit single X insulation deterioration 1 is isolated by the early passer 22 to avoid leakage current due to the absolute n 13 to avoid a sound circuit, ',, grounding misjudgment H, hair loss, leakage detection, cake detection, occurrence detection The circuit 2 is applied to the power supply system 1 of the positive terminal itM ς, and the grounding 15 station 戛 transient compensator 24 can be added. The voltage temporary energy compensation is 24, which is set at the side of the leakage current detector. With the single-guide 诵5|91 s can suppress the short-circuit fault circuit u ° ^ g of the load 12 due to the disturbance of the loop 1 - power; the Wei 24 (10) electric (four) 242 and - one-way rose immediately composed; The resistor 1 § 242 and the energy storage component 241 are connected to each other, and the positive and negative terminals connected to the back of the power supply system 1 form a charging circuit, and the unidirectional discharger 243 is connected in parallel with the resistor 42 side; When the power supply system m circuit is called a short circuit, causing a low voltage, it reads the energy storage component of the full circuit 11 through the one-way discharger. 243 performs a discharge supply negative, and the thin 2 has a disturbance against a short low voltage; the lean supply & the positive terminal ground 15 of the power supply system 1 may be additionally provided with a resistor 17. [0023] Referring to FIG. 12, if the power supply system i of the above embodiment is the negative terminal ground 16, the single-conductor 22 is connected to the positive end of the circuit 11 of the power supply system (6), and the above implementation can also be achieved. The function of the example is another application method. The negative terminal grounding 16 of the power supply system 1 may be additionally provided with a resistor 17 [0024] Referring to Figures 6, 1〇, 11 and 12, the above embodiments are described. The single-conductor 22 has the characteristics of single-direction conduction, and can effectively isolate the insulation. 099137579 Form No. A0101 Page 10 / Total 29 Page 0992065486-0 201220631 [0025] [0028] [0028] [0029] [0032] [0032] The return current of the leakage current of the grounding 13 avoids the misjudgment of the leakage current detector 23 of each sound circuit ;; the single-conductor 22 prevents the power-off element 21 from being unidirectionally connected. When the device 22 is connected to the wiring, the polarity is reversed due to human factors, causing damage to the connected load 丨2 during power transmission; and the single-conductor 22 is matched with the voltage transient compensator 24, and other healthy circuits can be resisted. The effect of low voltage. Referring to FIG. 13, the single-conductor 22 of the leakage detecting circuit 2 of the present invention may be composed of a plurality of single-conducting elements 221 to avoid the failure of the single-directional conduction element 221 to cause the isolation function of the single-conductor 22 to be disabled. However, the one-way discharger 243 can also be composed of a number of one-way discharge elements #2431. [Simple diagram of the diagram] Fig. 1: Circuit diagram of unipolar insulation degradation ground fault in the conventional ungrounded systemFig. 2: Conventional ungrounded system, insulation degradation, ground fault, leakage current flow diagram, Fig. 3: conventional ungrounded system A flow diagram of stray capacitance discharge when a unipolar insulation degrades a ground fault. Fig. 4 is a flow diagram showing the flow of stray capacitance discharge using a resistor grounding. 〇 Fig. 5: Circuit diagram of the non-grounded power supply system of the present invention. Fig. 6 is a flow chart showing the ground leakage current of the insulation degradation of the non-grounded power supply system of the present invention. Figure 7: Operation diagram of the voltage transient compensator of the present invention. 099137579 Form No. Α0101 Page / Total 29 Page 0992065486-0 201220631 [0033] Brother 8 Figure · The present invention bud 0% pressure transient compensator rose resistance to transient low voltage operation [] mapbook & Flow diagram of grounding power supply system insulation degradation ground leakage current [0035] Figure 10: Figure of the present invention. Resistance Grounding Power Supply System Voltage Transient Compensator Operation [0036] [0038] Figure 11: Operation diagram of the positive terminal grounding power supply system of the present invention. Figure 12: Operation diagram of the negative-end grounding power supply system of the present invention. Figure 13: The single-conductor and one-way discharger of the present invention are represented by a number w and are applied. [Main component symbol description] 099137579 [0039] 1. Power supply system 11. Circuit [0040] 12. Load 13. Insulation degradation grounding [0041] 14. Resistance grounding 1. 5. Positive terminal grounding [0042] 16. Negative terminal grounding 17 , Resistor [0043] 19. Stray capacitance 2. Leakage detection circuit [0044] 21. Power-off element 22. Single-conductor [0045] 221. Single-conducting element 2 3. Leakage current detector [0046] 231. Monitoring Module 2 4. Voltage Transient Compensation - [0047] 241. Energy Storage Element 2 411. Series End [0048] 2412. Ground 242. Resistor Γ 9 Form Number Α 0101 Page 12 / Total 29 True 0992065486-0 201220631 [0049] 243. One-way discharger 2431. One-way discharge day [0050] 9. Power supply system 93. Shunt load [0051] 94. Ground fault 9 5. Leakage current sensor [0052] 96. Circuit breaker 97 .Resistor Grounding [0053] 98. Stray Capacitance Ο Ο 099137579 Form No. 1010101 Page 13 of 29 0992065486-0