{"id":2323,"date":"2025-08-07T13:22:51","date_gmt":"2025-08-07T05:22:51","guid":{"rendered":"https:\/\/www.dexie-tech.com\/?p=2323"},"modified":"2025-08-07T13:22:52","modified_gmt":"2025-08-07T05:22:52","slug":"development-and-application-of-leakage-current-detection-technology-for-ac-dc-panel-evolution-from-dc-panels-to-ac-dc-hybrid-systempanels","status":"publish","type":"post","link":"https:\/\/www.dexie-tech.com\/?p=2323","title":{"rendered":"Development and Application of Leakage Current Detection Technology for AC\/DC Panel: Evolution from DC Panels to AC\/DC Hybrid SystemPanels"},"content":{"rendered":"<p>With the development of power electronics technology, DC screen systems have gradually evolved into AC\/DC hybrid screens (AC\/DC screens) to meet more complex power supply needs. During this process, leakage current detection technology has also evolved from a single DC detection to a hybrid detection of AC and DC to ensure system safety and reliability<\/p><figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1456\" height=\"816\" src=\"https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png\" alt=\"\" class=\"wp-image-2324\"\/><\/figure><p><strong>1. The evolution process from DC Panels to AC\/DC Hybrid System Panels<\/strong><\/p><p><strong>1.1 Application and limitations of traditional DC panels<\/strong><\/p><p>DC Power PanelWidely used in power systems, communication base stations, rail transit and other fields, mainly for providing stable DC operating power supply. Its core functions include:<\/p><ul class=\"wp-block-list\"><li>Battery charging and discharging management<\/li>\n\n<li>DC load power supply (such as circuit breaker operating mechanism)<\/li>\n\n<li>Insulation monitoring (detecting DC leakage current)<\/li><\/ul><p>However, with the popularization of new energy (photovoltaic, energy storage) and frequency conversion equipment, traditional DC screens are facing new challenges:<\/p><p>1,<strong>Demand for AC\/DC hybrid power supply<\/strong>\uff1aInverters, frequency converters, and other equipment introduce AC components into DC screen systems, leading to the failure of traditional DC leakage current detection methods.<\/p><p>2, <strong>High frequency interference problem<\/strong>\uff1aThe high-frequency ripple generated by switching power supplies, PWM modulation, etc. affects the accuracy of leakage current detection.<\/p><p>3, <strong>Increased system complexity<\/strong>\uff1aThe scenario where DC and AC coexist requires a more flexible detection scheme.<\/p><p><strong>1.2 The rise of AC\/DC Hybrid System Panels<\/strong><\/p><p>AC\/DC Hybrid Power PanelOn the basis of traditional DC screens, AC distribution functions have been added, and typical applications include:<\/p><ul class=\"wp-block-list\"><li><strong>Microgrid system: Photovoltaic inverters and DC energy storage systems operate in a mixed manner.<\/strong><\/li>\n\n<li><strong>Industrial automation: DC bus+AC motor control for variable frequency drive (VFD) equipment.<\/strong><\/li>\n\n<li><strong>Data center: 48V DC power supply and AC UPS hybrid architecture.<\/strong><\/li><\/ul><p>The promotion of AC\/DC screens requires leakage current detection technology to adapt to the complex environment of AC\/DC mixed signals. Traditional DC leakage current sensors (such as shunt resistors and isolated operational amplifiers) cannot effectively detect AC leakage, so a new detection scheme is needed.<\/p><p><strong>2. he necessity of qualitative detection of AC\/DC leakage current<\/strong><\/p><p>In AC\/DC hybrid systems, the main goal of leakage current detection is to quickly determine whether there is a dangerous leakage, rather than accurately measuring the leakage value (quantitative detection). The necessity of qualitative testing is reflected in the following aspects:<\/p><p><strong>2.1 Priority given to security protection<\/strong><\/p><ul class=\"wp-block-list\"><li><strong>Electric shock risk: <\/strong>AC leakage current (such as 30mA or above) may directly endanger personal safety, and the circuit needs to be quickly cut off.<\/li>\n\n<li><strong>Equipment damage prevention: <\/strong>DC leakage current may cause insulation degradation, but AC leakage current may cause more serious short circuits or arc faults.<\/li><\/ul><p><strong>2.2 System stability requirements<\/strong><\/p><ul class=\"wp-block-list\"><li>In AC\/DC hybrid systems, high-frequency noise may cause false alarms in quantitative detection, while qualitative detection (threshold comparison) can more reliably trigger protection actions.<\/li>\n\n<li>In photovoltaic inverters or frequency converters, AC leakage may affect MPPT (maximum power point tracking) or motor control, and qualitative detection can quickly isolate faulty branches.<\/li><\/ul><p><strong>2.3 Economy and practicality<\/strong><\/p><ul class=\"wp-block-list\"><li>Quantitative detection requires high-precision ADC and complex algorithms, which are costly; Qualitative detection only requires a comparator or logic circuit, suitable for large-scale deployment.<\/li>\n\n<li>In industrial sites, maintenance personnel pay more attention to whether there is leakage rather than how much leakage is, and qualitative testing can simplify the operation and maintenance process.<\/li><\/ul><p><strong>3. Application of DEXIE Electronics&#8217; switchable leakage current sensor<\/strong><\/p><p><strong>3.1 FEATURES<\/strong><\/p><p>DEXIE Electronics&#8217; switchable leakage current sensor is a sensor designed specifically for AC\/DC hybrid systems, with the following advantages:<\/p><ol start=\"1\" class=\"wp-block-list\"><li><strong>AC\/DC hybrid detection:<\/strong><ul class=\"wp-block-list\"><li>Using flux gate technology for digital demodulation, it can simultaneously detect DC 0-200mA and AC 50H or 60Hz leakage current.<\/li>\n\n<li>Support composite signal analysis of DC offset and AC ripple, suitable for scenarios such as frequency converters and UPS.<\/li><\/ul><\/li>\n\n<li><strong>Non contact installation:<\/strong><ul class=\"wp-block-list\"><li>The structure can be opened and closed, and can be installed without disconnecting the busbar, reducing construction difficulty.\u3002<\/li><\/ul><\/li>\n\n<li><strong>High anti-interference ability:<\/strong><ul class=\"wp-block-list\"><li>Built in digital filtering to suppress high-frequency noise (such as PWM harmonics) and ensure the reliability of periodic detection.<\/li><\/ul><\/li>\n\n<li><strong>Adjustable threshold alarm:<\/strong><ul class=\"wp-block-list\"><li>Set the alarm threshold by customizing the threshold setting (such as conventional DC 6mA\/AC 30mA), and directly output a high-level signal to drive the relay.<\/li>\n\n<li>\u00a0<\/li><\/ul><\/li><\/ol><p><strong>3.2 Typical application cases<\/strong><\/p><ul class=\"wp-block-list\"><li><strong>Photovoltaic energy storage system: <\/strong>detects leakage current between the DC side (battery pack) and the AC side (inverter output) to prevent PID effect or insulation failure.<\/li>\n\n<li><strong>Industrial frequency conversion cabinet:<\/strong> Monitor the AC\/DC leakage of the motor drive system to avoid equipment shutdown due to insulation damage.<\/li>\n\n<li><strong>Data center power supply:<\/strong> Provides leakage protection in a hybrid architecture of 48V DC power supply and AC UPS.<\/li><\/ul><p><strong>4. Conclusion<\/strong><\/p><ol start=\"1\" class=\"wp-block-list\"><li>The evolution from DC panels to AC\/DC Hybrid System Panels reflects the growing demand for hybrid power supply in the power system, and leakage current detection technology needs to be upgraded synchronously.<\/li>\n\n<li>In AC\/DC hybrid systems, qualitative detection (rather than quantitative detection) can better meet the needs of fast protection and economy.<\/li>\n\n<li>DEXIE Electronics&#8217; switchable leakage current sensor provides an efficient and reliable leakage protection solution for modern power systems through non-contact AC\/DC hybrid detection.<\/li><\/ol><p>In the future, with the development of Internet of Things (IoT) technology, AC\/DC leakage current detection will be further integrated with intelligent operation and maintenance systems to achieve real-time monitoring, warning, and self-healing closed-loop management.<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>With the development of power electronics technology, DC screen systems have gradually evolved into AC\/DC hybrid screens (AC\/DC screens) to meet more complex power supply needs. During this process, leakage current detection technology has also evolved from a single DC detection to a hybrid detection of AC and DC to ensure system safety and reliability [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2324,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59],"tags":[],"class_list":["post-2323","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-information"],"blocksy_meta":[],"aioseo_notices":[],"rttpg_featured_image_url":{"full":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",1456,816,false],"landscape":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",1456,816,false],"portraits":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",1456,816,false],"thumbnail":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",150,84,false],"medium":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",300,168,false],"large":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",1024,574,false],"1536x1536":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",1456,816,false],"2048x2048":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",1456,816,false],"htliser_size_396x360":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",396,222,false],"htslider_size_1170x536":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",956,536,false],"woocommerce_archive_thumbnail":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",300,168,false],"woocommerce_thumbnail":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",300,168,false],"woocommerce_single":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",600,336,false],"woocommerce_gallery_thumbnail":["https:\/\/www.dexie-tech.com\/dx\/wp-content\/uploads\/2025\/08\/4-1.png",100,56,false]},"rttpg_author":{"display_name":"admin","author_link":"https:\/\/www.dexie-tech.com\/?author=1"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/www.dexie-tech.com\/?cat=59\" rel=\"category\">INFORMATION<\/a>","rttpg_excerpt":"With the development of power electronics technology, DC screen systems have gradually evolved into AC\/DC hybrid screens (AC\/DC screens) to meet more complex power supply needs. During this process, leakage current detection technology has also evolved from a single DC detection to a hybrid detection of AC and DC to ensure system safety and reliability&hellip;","_links":{"self":[{"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=\/wp\/v2\/posts\/2323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2323"}],"version-history":[{"count":1,"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=\/wp\/v2\/posts\/2323\/revisions"}],"predecessor-version":[{"id":2325,"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=\/wp\/v2\/posts\/2323\/revisions\/2325"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=\/wp\/v2\/media\/2324"}],"wp:attachment":[{"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dexie-tech.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}