In the highly automated and continuously operating industrial system of modern power plants, equipment selection is not only related to operational efficiency, but also directly affects overall safety and economy. Among various forms of valve drive, electric valves have gradually become the mainstream choice, due to their comprehensive advantages in control capability, environmental adaptability, operational performance, and full lifecycle cost.
Firstly, in terms of automation and intelligence, electric valves can seamlessly integrate with distributed control systems (DCS) or PLC systems. As an executing device, it can directly receive 4-20mA analog signals or digital instructions to achieve continuous adjustment and remote control of valve opening. This highly integrated capability enables it to participate in key process links such as boiler feedwater regulation and turbine bypass control, supporting the development of power plants towards "less manned" or even "unmanned" direction.
Secondly, in terms of adaptability to complex working conditions, electric valves demonstrate good stability. The power plant environment is often accompanied by high temperature, high pressure, dust, and corrosive media. High quality electric actuators can operate stably for a long time through high protection level design and the application of high-temperature resistant materials. At the same time, its power-off protection function can maintain the current position of the valve in case of sudden power outage, avoiding system loss of control; Cooperate with over torque and overheating protection mechanisms to effectively reduce the risk of equipment damage.
In terms of regulating performance, electric valves have high control accuracy and repeatability. Relying on servo motors and precision transmission structures, it can achieve subtle changes in opening, meeting the high precision requirements of processes such as chemical dosing and cooling water regulation. With the advancement of technology, the response speed of electric actuators has also significantly improved, enabling smooth and timely adjustment during changes in unit load.
From an economic perspective, electric valves have more advantages throughout their entire lifecycle. It only consumes electrical energy during operation and hardly consumes energy when maintaining valve position, making it more energy-efficient compared to pneumatic valves that rely on continuous gas supply. In addition, electric valves do not require complex air compression systems, reducing the investment and maintenance costs of ancillary equipment. Although the initial procurement cost is relatively high, its long-term usage cost is more competitive due to its lower failure rate and maintenance requirements.
In terms of safety and regulations, electric valves also have advantages. For the possible flammable and explosive environment in power plants, electric actuators with explosion-proof certification can be selected to reduce safety risks from the source. At the same time, the electric system does not have problems such as gas source leakage and has higher operational stability.
Overall, electric valves are not only a type of execution equipment, but also an important node in the automation system of power plants. Its outstanding performance in control accuracy, system integration, operational reliability, and economy makes it an important support for modern power plants to achieve safe, efficient, and intelligent operation.
