Zero carbon park grid connected anti islanding protection device

1.Zero carbon park grid connected anti islanding protection deviceOverview

AM3 seriesZero carbon park grid connected anti islanding protection deviceIntegrating protection and control, it can meet the requirements of customers' power systems with voltage levels of 20KV and below for ensuring the safe operation and reliability of power energy. Currently widely used in power distribution systems such as substations, industrial and mining enterprises, hospitals, schools, commercial squares, and large buildings. The protection device adopts mature and reliable protection principles and algorithms, with strong anti-interference performance, high reliability, flexible protection implementation methods, and redundant communication design. The device has 8 channels of switch value acquisition and 5 channels of relay output, which can be combined with Acrel-2000Z power monitoring software to achieve unmanned end-user substation distribution automation system.

2. Characteristics

Mature and comprehensive protection functions:

The protection device can flexibly configure different protection functions for different primary equipment, and can achieve protection and control functions for substations with voltage levels below 20kV. It is suitable for the protection and automatic control functions of equipment such as lines, busbars, and distribution transformers.

High performance hardware and software platform:The AM3 series protection device adopts a high-performance hardware platform, all of which use industrial grade components, EMC design, and a complete online self-test program. It uses a high-performance processor as the protection CPU, configured with large capacity RAM and Flash, making this product have strong data processing, logical operation, and information storage capabilities.

hommization:The device adopts a fully Chinese color screen LCD display, with a clear and easy to understand human-machine interface; Flexible and comfortable button design, simple and convenient menu based operation; The debugging and analysis software equipped with computer interface is simple and convenient to debug and maintain.

Rich interface resources:4-channel AC current, 3-channel AC voltage channel; 8 switch input channels (AC/DC dual-use), 5 switch output channels; 1 RS485 communication interface.

Flexible and convenient wiring methods:The device's 3-channel AC voltage input can be connected to phase voltage, as well as to line voltage or zero sequence voltage, adapting to various PT wiring methods. The protective current can be connected to three-phase current; The other AC current channel can be connected to zero sequence current or line current.

Transparency:Real time recording of traffic volume, input volume, output volume, and the status of all protection modules; Record and protect the action behavior, action time, and waveform data of internal components.

Custom switch input:Users can customize the switch input according to their needs, which can meet their daily needs and is flexible and convenient.

Customize a simulation diagram once:Users can choose different modes of primary simulation diagrams according to their needs, and customize the configuration of primary simulation diagrams to meet their daily needs, which is flexible and convenient.

High reliability design:Through 6 electromagnetic compatibility testing certifications, the electrical fast transient pulse group, electrostatic discharge, surge anti-interference performance, etc. have all reached the IV level standard.

Openness:The device has two built-in communication protocols: Modbus RTU and IEC 60870-5-103, which can be selected through menu settings. It can achieve remote fixed value modification and switching, event recording and waveform data uploading, pressure plate switching, remote signaling, and tripping and closing.

3. Function Comparison Table

Front panel description

The human-computer interaction of the device is mainly carried out on the panel, including three parts: LCD display, LED light indication, and buttons. The LCD screen adopts an 800 * 480RGB color screen, which can display real-time values of electrical parameters such as current, voltage, power, remote signaling, event recording, device parameters, fixed value parameters, time, device version number information, etc. LED lights are used to indicate the operating status, protective actions, and other information of the device.

4. Appearance and opening size

Note: 1. The size of the square hole is 122 * 162; 2. The opening size is measured in millimeters (mm).

AM3-IPhotovoltaic grid connected anti islanding protection deviceMain functions: low-frequency load shedding, high-frequency protection, low-voltage protection, overvoltage protection, reverse power protection, automatic closing under voltage.

Anti islanding protection devicefunction

1. Island detection and protection: Through the dual detection mode of "active frequency disturbance+passive voltage harmonic analysis", the island effect is accurately identified. Active frequency disturbance injects specific frequency signals into the power grid to change its operating state and determine islanding based on the response; Passive voltage harmonic analysis monitors the distortion rate and harmonic content of voltage waveforms in real time to determine the status of the power grid.

2. Overvoltage/undervoltage protection: When the grid voltage exceeds or falls below the set threshold, the device triggers a protection trip, cuts off the grid switch, and prevents equipment from being damaged due to abnormal voltage.

3. Overfrequency/Underfrequency Protection: Equipped with high frequency protection tripping and low frequency protection tripping functions. When the grid frequency exceeds the normal range, the grid switch is quickly cut off to avoid frequency instability caused by islanding effects.

4. Reverse power protection: prevents distributed power sources from reversing power to the grid, protecting the safety of the grid.

5. Automatic reclosing: After the power grid fault is resolved, the device automatically detects that the voltage and frequency return to normal, automatically closes the grid switch, and resumes grid operation, achieving intelligent unmanned operation.

Details consultation: Manager An 15 Ringbells 353828