The introduction of distributed power into smart substation can enhance the security and flexibility of smart grid and significantly improve the operation efficiency. In addition, the existence of a single power flow network in the distribution system has also changed, making it change from a one-way power supply network to a multi-source network. The original protection measures and actions of substation are aimed at a single power flow network. Nowadays, the transformation of single power flow network into multi-network will make the previous protection actions and measures no longer safe and reliable. According to this change, the role of relay protection in intelligent substation is challenged after accessing distributed power supply.
2. Hardware integration technology of intelligent substation.
With the continuous development and progress of smart grid, the hardware of description language has begun to appear in the hardware system of power grid. The appearance of description language hardware makes the design and application of intelligent substation integrated, automated and modeled. The above characteristics make the hardware system have a comprehensive modular planning, and some different logic problems can be solidified on the equipment inside the smart substation, and the hardware application can be achieved through software control. This ensures the accuracy and reliability of design and application, and also solves the key problems in information transmission.
3. Software component technology in intelligent substation.
Software technology and hardware technology in intelligent substation complement each other and form a perfect cooperation. Software system is the soul and key to ensure the normal operation of intelligent substation. It can not only realize information control and monitoring functions, but also integrate phasor measurement unit (PMU) and wave recording function, and complete advanced functions such as regional disease control, online state monitoring and remote operation in substation. It is of far-reaching significance to ensure the safe and stable operation of the increasingly large and complex power system and improve the degree of automation.