Power quality on-line monitoring system is a monitoring and analysis system with high requirements, complex structure, wide range, and gradual development of business and technology. It is required that the system design should fully consider the requirements of availability, stability, maturity, flexibility and openness, as well as the characteristics of security, scalability, manageability, friendliness and high performance.
The requirements of reliability and stability have different emphases for different links of the system. From the application point of view, the system is a real-time monitoring system, the historical data stored is transmitted according to the event or timing. Therefore, the key to the reliability of the system does not require 100% continuous operation without gaps, but lies in the fault location and maintenance time as soon as possible, as long as the fault processing does not cause data loss in the data storage cycle of the monitoring terminal.
Accuracy and integrity: the core purpose of the system construction is to provide the basis for the automatic statistics, evaluation and analysis of the power quality of the provincial power grid, and the only basis is the power quality data stored in each monitoring terminal. If the data is not accurate or complete, it will directly cause statistical and analysis errors. Therefore, the accuracy and integrity of system data is a core basic requirement.
Openness and security: the security of the system is very important for the system, so in the system design, while ensuring the openness, we must also ensure the security of the system to prevent the intrusion of unauthorized users and the leakage of confidential information.
Practicability and expansibility: the construction of power quality monitoring system always implements the principle of application-oriented and practical, adheres to the principle of practicality and economy, and achieves smooth construction, application, effectiveness and development as far as possible. In terms of hardware, we adopt the existing equipment, software functions adopt the principle of phased and layered construction, and fully consider the expansibility of software and hardware, so that there is room for expansion, easy to expand, and meet the requirements of greater development in the future.
Advanced and mature: the development of computer technology and information technology change rapidly. The concepts, techniques and methods necessary for system design are objective needs. But the advanced nature can not be reduced at the expense of system reliability, so we should pay attention to the relative maturity of structure, equipment and tools. It can not only reflect today's technology, but also has development potential, and can smoothly transition to the next generation. Advanced and mature should be "balanced".
Easy maintenance: the management, maintenance and repair of the system should be simple and operable. The operators and operators at all levels can identify the fault type and fault information, and the common system obstacles can be eliminated by simple methods. The key parameters of the system can be maintained remotely through various access methods, and the function points in the system application can be subdivided and reorganized. The human-computer interaction interface can be customized and configured flexibly according to the needs of users, so as to reduce the maintenance cost.
