Transformer protection and measurement device used by Guodian Nanrui

Transformer protection and measurement device for Guodian Nanrui DSA-3116CTransformer protection and measurement device for Guodian Nanrui DSA-3116C1 Overview

1.1 System Overview

With the rapid and in-depth development of the national power industry, the requirements for the automation level of power grid operation and management are becoming increasingly high. Not only does it require improving the intelligence level and performance price ratio of all devices, but it also requires improving the automation level of the entire system and increasing the reliability of system operation. The rapid development of modern technology and the increasing maturity of computer networking technology have provided possibilities to meet these practical needs. Nanrui Group has fully grasped the development and demand of the market, and timely developed a new generation of DSA series substation protection and monitoring integrated system.

DSAThe series substation protection and monitoring integrated system is a set of substation comprehensive automation systems developed by Nanrui Group for medium and low voltage substations, which focuses on the technical strength of protection and monitoring. Based on mature experience and technology, it utilizes the principles and techniques of * and is more technically advanced and suitable for the construction and renovation of medium and low voltage substations. The system has been optimized in hardware design, software design, user interface wiring, substation information sharing, communication interface, and other aspects. Due to the optimized configuration, the performance price ratio has been improved, making it highly competitive in terms of technical and economic comprehensive indicators for small rural substations and switch stations.

DSAThe series substation protection and monitoring integrated system adopts a layered distributed structure design, supporting three different configuration schemes: centralized configuration, decentralized configuration, and local decentralized configuration. Its system functions can meet the requirements of substations with different voltage levels. The DSA series substation protection and monitoring integrated system fully utilizes network communication functions, allocates information reasonably, reduces hardware redundancy, and simplifies secondary circuits. The entire system is divided into three levels: the interval layer, which completes the collection and control of primary equipment on site; The communication layer completes the interconnection of intelligent devices throughout the entire substation; The local management completes the classification, management, and storage of information for the entire substation.

In the DSA series substation protection and monitoring integrated system, a distributed modular structure is adopted, which makes the system configuration flexible and easy to expand; Strictly consider electromagnetic compatibility issues and anti-interference measures to enhance the reliability of the system; *The application of the CAN matching network system ensures the real-time performance of distributed multi CPU systems during data transmission; A communication unit with dual machine redundancy configuration, equipped with multiple standard interfaces, and communication protocols that can be configured online to achieve connection with multiple intelligent devices; *The comprehensive automation monitoring system enables the dispatch end to remotely monitor the substation, modify the setting of the microcomputer protection device, activate or lock local protection functions, signal reset and other operations, achieve voltage and reactive power control, meet the requirements of substation management, and is suitable for unmanned substations. The protection measurement and control unit is directly configured to each distribution interval, saving a lot of signal and control lines, reducing the burden on TA, reducing the workload of design, installation, and commissioning, and shortening the operation cycle.Transformer protection and measurement device used by Guodian Nanrui Transformer protection and measurement device used by Guodian Nanrui

DSAThe integrated protection and monitoring system for series substations is an ideal choice for comprehensive automation systems in substations.

1. 2 Technical parameters

   2.1 Rated parameters

2. AC voltage: 100V, 57.7V

3. AC current: 5A, 1A

4. Frequency: 50Hz

5. DC power supply: 220V, 110V, allowable deviation+15%, -20%

6. DC voltage:+5V, ± 12V

7. 2.2 Power consumption

8. AC current circuit: When the rated current is 5A, each phase should not exceed 1.0VA

9. When the rated current is 1A, each phase should not exceed 0.5VA

10. AC voltage circuit: At rated voltage, each phase shall not exceed 0.5VA

11. DC power supply circuit: operates normally, with each protection unit not exceeding 20W

12. Protection action, with each protection unit not exceeding 30W