1、DNAN-智能调节零线电流处理器技术：
DNAN零线电流处理器设备主要用于解决三相四线制配电系统中因零序谐波（尤其是3次谐波）和三相不平衡电流导致的零线电流过大问题，其核心原理是通过 DNAN模块+动态滤波电抗器组成的零线电流处理技术，消除负载侧的零线电流，保障配电安全。以下是其详细工作原理：

图1（DNAN零线电流处理器安装接线图）

2、DNAN-智能调节零线电流处理器接线方式：
负载串接DNAN零线电流处理器设备由串联型零序滤   波器对零序谐波电流（3次谐波）进行谐波电流治理，再由DNAN模块控制调整串联型零序滤波器的磁通量实时对零序谐波电流（3次谐波）进行自动消除。同时还补偿输出电流的三相不平衡电流，减少上级主开关的三相不平衡跳闸，提高变压负载的三相电流平衡度，保护变压器。

3、DNAN-智能调节零线电流处理器的核心处理原理

技术理原理：零序谐波抵消法通过通过高精度CT实时监测三相电流的谐波成分（以3次谐波为主）生成反向电流设备通过IGBT逆变器快速生成与谐波幅值相等、相位相反 的补偿电流，注入负载系统中。治理效果：零线总谐波电流被抵消，显著降低至安全范围（如从100A降至10A以下）。

磁性滤波器应用于处理零线电流过大原理：磁性滤波器主要由 ‌磁棒/磁板‌（高磁导率材料如铁氧体或钕铁硼）、‌流体通道‌（设计为多层或螺旋流道）组成，零线电流主要由负载的3N次谐波源相互叠加在零线上面，我们须了解3N次频率的低阻抗和磁通方向。负载侧产生的3N次谐波源会向电网侧反馈，在反馈过程会产生一个方向的磁通量。通过监测到3N次谐波源的磁通量反。磁性滤波器内部产生一个反向磁通量，让3N次谐波源相互在线圈内部抵消。从而消除了3N次谐波源向电网侧反馈，消除电网侧及负载侧上的零线电流。

4、DNAN-智能调节零线电流处理器处理方式：
负载串接消除零线电流好处是在安装点位置  可以同时消除设备往变压器的零线电流（如图1零线电缆1上端零线电流可以消除90%以上）也能消除设备往负载侧的零线电流（如图2零线电缆2上端零线电流可以消除90%以上）。

5、DNAN-智能调节零线电流处理器优点：

1) 设备自动处理零线电流效率高，触摸屏开关机（带自动旁路）操作方式：串接负载带自动转换旁路，可以对比投入前与投入后的零线电流消除效果。故障报警自动转入旁路（无需人工操作），自动发送手机短信通知设备管理负责人有故障报警，需派人查看。

2) 自动调节负载的三相不平衡电流，保护上级开关不会产生不平衡电流跳闸保障负载安全用电。

3) 自动消除负载产生的零线电流，消除零线电流90%以上，消除零线电缆线发热的火灾隐患，保护零线电缆安全正常运行。

4) 串接设备输出端电压不会产生电压差，输出的相电压基本平衡不会使负载灯光闪烁，不会使负载控制器产生高电压，低电压报警，保障负载正常工作。

5) 设备使用简单，接线通电后自动投入工作。自动调节负载三相不平衡电流，自动消除零线电流。

6、DNAN-智能调节零线电流处理器与传统的消除零线电流区别：

7、DNAN零线电流处理器技术数据

该表列出的技术数据是常用规格，若有特殊要求，请联系我们。

1. DNAN Intelligent Zero Line Current Processor Technology:
The DNAN zero line current processor equipment is mainly used to solve the problem of excessive zero line current caused by zero sequence harmonics (especially 3rd harmonic) and three-phase unbalanced currents in three-phase four wire distribution systems. Its core principle is to use the DNAN module dynamic filtering reactor composed of zero line current processing technology to eliminate the zero line current on the load side and ensure distribution safety. The following is its detailed working principle:

Figure 1 (Installation and wiring diagram of DNAN neutral current processor)

2. DNAN Intelligent Zero Line Current Processor Wiring Method:
The load series connected DNAN zero line current processor equipment uses a series type zero sequence filter to control the harmonic current of the zero sequence harmonic current (3rd harmonic), and then the DNAN module controls and adjusts the magnetic flux of the series type zero sequence filter to automatically eliminate the zero sequence harmonic current (3rd harmonic) in real time. At the same time, it also compensates for the three-phase unbalanced current of the output current, reduces the three-phase unbalanced tripping of the upper level main switch, improves the three-phase current balance of the transformer load, and protects the transformer.

3. The core processing principle of DNAN intelligent adjustment zero line current processor

Technical principle: Zero sequence harmonic cancellation method generates reverse current by real-time monitoring of the harmonic components (mainly the 3rd harmonic) of three-phase current through high-precision CT. The equipment quickly generates compensation current with equal amplitude and opposite phase to the harmonic through IGBT inverter, and injects it into the load system. Governance effect: The total harmonic current of the neutral line is cancelled out and significantly reduced to a safe range (such as from 100A to below 10A).

The principle of using magnetic filters to deal with excessive zero line current: Magnetic filters are mainly composed of magnetic rods/plates (high permeability materials such as ferrite or neodymium iron boron) and fluid channels (designed as multi-layer or spiral channels). The zero line current is mainly composed of 3N harmonic sources of the load stacked on top of the zero line. We need to understand the low impedance and magnetic flux direction of the 3N frequency. The 3N harmonic source generated on the load side will feedback to the grid side, generating magnetic flux in one direction during the feedback process. By monitoring the magnetic flux reversal of 3N harmonic sources. A reverse magnetic flux is generated inside the magnetic filter, causing the 3N harmonic sources to cancel each other out inside the coil. Thus eliminating the feedback of 3N harmonic sources to the grid side and eliminating the zero line current on the grid side and load side.

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4. DNAN Intelligent Zero Line Current Processor Processing Method:
The advantage of load series connection in eliminating zero line current is that at the installation point, it can simultaneously eliminate the zero line current from the equipment to the transformer (as shown in Figure 1, the zero line current at the upper end of neutral cable 1 can be eliminated by more than 90%) and also eliminate the zero line current from the equipment to the load side (as shown in Figure 2, the zero line current at the upper end of neutral cable 2 can be eliminated by more than 90%).

5. Advantages of DNAN Intelligent Zero Line Current Processor:

1) The equipment has high efficiency in automatically processing zero line current, and the touch screen on/off (with automatic bypass) operation mode is to connect the load in series with automatic switching bypass, which can compare the zero line current elimination effect before and after input. The fault alarm will automatically switch to the bypass (without manual operation), and a mobile SMS will be sent to notify the equipment management responsible person that there is a fault alarm and someone needs to be sent to check it.

2) Automatically adjust the three-phase unbalanced current of the load, protect the upper level switch from generating unbalanced current tripping, and ensure the safe use of electricity by the load.

3) Automatically eliminate the zero line current generated by the load, eliminate over 90% of the zero line current, eliminate the fire hazard caused by the heating of the zero line cable, and protect the safe and normal operation of the zero line cable.

4) The output terminal voltage of the serial device will not generate voltage difference, and the output phase voltage will be basically balanced without causing the load light to flicker, and will not cause the load controller to generate high voltage or low voltage alarm, ensuring the normal operation of the load.

5) The device is easy to use and automatically starts working after being wired and powered on. Automatically adjust the three-phase unbalanced current of the load and eliminate the zero line current.

6. The difference between DNAN intelligent zero line current processor and traditional zero line current elimination:

7. DNAN Zero Line Current Processor Technical Data

The technical data listed in this table are common specifications. If you have any special requirements, please contact us.