What Is Power System Automation?

Power system automation is the development direction that our power system has been striving for. It includes: automation of power generation control (AGC has been implemented and needs to be developed), automation of power dispatching (comprehensive program of online flow monitoring, fault simulation and SCADA system implementation In order to realize the automation of the power distribution network, the most popular integrated automation of substations today is the construction of integrated self-stations to achieve better unmanned duty. DTS (the dispatcher training simulation system provides convenience for the dispatcher to learn) Achieved, yet to be developed).

Realization of power system automation for power generation, transmission and management

Power system automation mainly includes three aspects: real-time monitoring of regional dispatching , substation automation, and load control .

Real-time monitoring system for regional dispatch : Usually composed of small or microcomputers, the functions are similar to the central dispatch monitoring system, but it is slightly simpler.

Substation automation: The development direction is unmanned, and its remote control device uses a programmable method of a microcomputer.

Load control: Power frequency or audio frequency control is often used. Automation is not only in hardware, but also in all aspects of software systems, such as production management and auxiliary decision-making systems, ^[3]

According to the process of electricity production and distribution,

Before the 1950s , the power system capacity was around several million kilowatts, and the stand-alone capacity was not more than 100,000 kilowatts. The automation of power systems was mostly limited to a single automatic device, and mainly focused on safety protection and automatic process adjustment. For example, various relay protections for power grids and generators, emergency guards for steam turbines, safety valves for boilers, automatic adjustment of turbine speed and generator voltage, and automatic synchronization devices for grid connection.

From the 1950s to the 1960s , the scale of the power system developed to tens of millions of kilowatts, with a single unit capacity exceeding 200,000 kilowatts, and a regional network was formed.

relative devices

New requirements have been raised in economic dispatch and integrated automation. In the field of factory automation, centralized control of machines, furnaces and electric units has been adopted. The system began to install analog frequency modulation devices and economic power distribution devices based on off-line calculations, and widely used remote communication technology. Various new automatic devices such as transistor protection devices, thyristor excitation regulators, and electro-hydraulic governors have been promoted and used.

From the 1970s to the 1980s , a computer-based real-time monitoring system (SCADA) with a complete set of software and hardware was introduced. Large thermal power generating units above 200,000 kilowatts have begun to adopt real-time safety monitoring and closed-loop automatic start-stop full-process control. Computer monitoring of reservoir dispatching, dam monitoring and integrated automation of hydropower stations has begun to be promoted. Microcomputers are widely used in various automatic adjustment devices and relay protection devices.