ADVP-8000G series microcomputer protection and monitoring device

Overview

The ADVP-8000G series devices are suitable for power plants and substations with voltage levels of 110kV and below, providing monitoring, protection, and control functions for the primary equipment of the entire station. They are suitable for both new power plants and substations as well as for the renovation of old stations. The devices adopt multiple advanced technologies in line with modern industrial control technology, such as high-performance microcontrollers, fieldbus, and real-time multitasking operating systems, making them fully functional, versatile, easy to install and debug, and reliable to use. They are ideal supporting products for substation automation.

The ADVP-8000G series products include protection, measurement, and control devices for main transformers, motors, capacitors, lines, and other equipment, primarily suitable for 110kV and below power transformation and distribution stations.

Key Features:

1. Modular hardware support platform, software support platform, and functional modules; based on object-oriented programming design method, with high code reuse rate;

2. Improve robust debugging capabilities to simplify development debugging and on-site accident analysis;

3. Supports both serial port and network program upgrade methods, making program upgrade simple and easy;

4. Traditional protection function and human-machine interface function;

5. Communication system module compliant with IEC61850 standard;

6. Communication system module based on the network 103 standard;

7. Improve robust waveform recording capabilities, supporting the output of waveform files in COMTRADE-99 format;

8. Perfect debugging output function, supporting the output of action reports, wave recording reports, self-check reports, event sequences, and other information without relying on the backend system. It also supports recording of some functional menu operation processes, IRIGB code message recording, internal memory data viewing, and internal variable address viewing (aiding development and debugging);

9. The accident snapshot function can record and save information such as protection settings, hard and soft pressure plates during the protection action, for use in accident analysis;

10. Program sequence control module, with controllable process editable online, capable of replacing traditional PLC;

11. Process layer GOOSE based on industrial Ethernet.

Distribution characteristics of the system:

The integrated automation system, consisting of the ADVP-8000G series of decentralized protection and monitoring devices, is a hierarchical and distributed system. It is designed and configured according to the principle of one device per component (one bay), allowing for direct and decentralized installation on high-voltage switchgear. Each bay functions independently, and devices are only connected through a network for information sharing. This design enhances the flexibility of the entire system, and any device failure only affects one component, significantly improving its reliability.

Network characteristics of the system:

       Due to the transmission of information being facilitated by the interconnection of network systems through communication networks, the conventional secondary signal control cables have been eliminated, greatly simplifying the secondary cables within the station. This not only saves a significant amount of investment, but also reduces the load on CTs and PTs, decreases construction difficulty and maintenance workload, and conserves considerable manpower and material resources.

The protection function in the protection and control device is independent, which is specifically reflected in the following aspects:

1. The protection function is completely independent of the communication network, so network failure does not affect the normal operation of protection;

2. The device still retains the independent input and output circuits and operation circuits that traditional microcomputer protection possesses;

3. In terms of software design, the protection module is completely separated from other modules, and it follows the principle of protection before measurement, ensuring its independence.

Measures to improve system reliability:

 1. The adoption of a hierarchical distributed system is a crucial factor in enhancing the reliability of the entire substation, especially the independent configuration of various protection and automatic devices, whose functions are independent of the communication network, in each bay. It serves as a prerequisite for the safe and stable operation of the substation;

 2. The definition of the backplane terminals of the device still follows the traditional mode, which is compatible with traditional operation control functions, ensuring the operation and control of the substation under extreme working conditions;

 3. The device structure adopts a fully sealed design, with carefully designed anti-interference components, greatly improving its resistance to vibration and electromagnetic interference.

4. User-friendly human-machine interface: The device features a large-screen LCD display, with main wiring diagram parameters, Chinese tree menu, trip reports, alarm reports, and setting value adjustments all clearly displayed on the LCD, eliminating the need to refer to any technical documentation, making it easy for on-site operation and commissioning personnel to use;

5. Any state changes within the device can be displayed on the liquid crystal display, including input, effective values of voltage and current, phase, power, and electrical degree, etc;

 6. The device adopts a five-button combination keyboard, allowing for easy control, learning, and use.

Due to the adoption of a high-performance processor, combined with some special programming techniques, it possesses advantages that similar devices do not:

The device utilizes a high-speed, high-resolution 16-bit A/D converter, combined with a dedicated measurement CT and digital signal processor (DSP) for computation, ensuring high accuracy and response speed for telemetry measurements. It can also perform real-time calculations of active power, reactive power, power factor, and other parameters locally;

Complete distributed fault recording for low-voltage systems without increasing hardware costs, and enable remote transmission and local printing of fault waveforms;

The protection action signal is converted into a remote signaling signal locally at the local bay level and uploaded, reducing the time for transmitting protection action reports to the dispatch center. This makes the transmission speed of fault reports equivalent to that of position remote signaling, facilitating the interface with the dispatch system, and eliminating the need for a separate event interpretation program at the dispatch end;

Each set of equipment is equipped with a comprehensive automatic simulation debugging function. The setup of this simulation debugging module completely separates the debugging work of the generator set protection function from the automatic joint debugging work, avoiding duplicate work.

Communication interface

 The ADVP-8000G series of distributed protection and control devices feature standard communication interfaces for RS485 and CAN, and support up to three Ethernet communication interfaces. The communication protocol can be either the power industry standard DL/T667-1999 (IEC-60870-5-103) protocol (either serial port 103 or network 103) or the IEC61850 protocol. It also supports fiber-optic communication interfaces.

Time adjustment method:

The ADVP-8000G series of distributed protection and control devices have two methods for time synchronization. One method is through communication software (protocol broadcast timing or network SNTP). The other method is through receiving B-code timing, with a timing accuracy of 1ms. All devices share a common timing bus, input in differential signal (RS485 bus level), and the timing bus medium uses shielded twisted-pair cables, which can utilize the remaining pair of twisted-pair cables in the communication cable.