Study on Application of Decoupling Circuit to I&C System of Nuclear Power Plant

2013 ◽  
Author(s):  
Tian Zheng ◽  
Longqiang Zhang ◽  
Huaqing Peng
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Power Supply ◽  
Nuclear Power ◽  
Signal Transmission ◽  
Analog Signal ◽  
Electrical Isolation ◽  
Independent Power Supply ◽  
Isolation Amplifier ◽  
Isolation Device

Electrical isolation is required for signal exchanging between redundant I&C divisions. Relay and isolation amplifier are often used as the isolation device for binary and analog signal transmission. Simple isolation device is not enough to make the electrical isolation. Decoupling circuit which is the combination of isolation devices and an independent power supply can totally compensate the insufficiency of simple isolation device and prevent the electrical fault propagating along the signal exchanging circuit.

The Necessity of Independent Configuration of the DC Power Supply System Used for Power Supply and Auxiliary Power Supply in Nuclear Power Plant

2018 ◽  
Author(s):  
Zhang Zhichao
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Power System ◽  
Power Supply ◽  
Nuclear Power ◽  
Power Supply System ◽  
Power Source ◽  
Dc Power ◽  
Auxiliary Power ◽  
Ac Power

At present, in the typical design of China’s nuclear power plant, main generation system is connected to the power grid by 500 kV system. 500 kV system as a priority power source, 220kV system as an auxiliary power source. Independent operation of 500kV and 220kV system, improved the reliability of power supply of nuclear power plant. However, the DC 220V power system used to control the 500kV and 220kV system in the switch station of partial nuclear power project is not independently configured, and the design form of one set of DC system is used in the transformer station. In recent years, there are many accidents that AC power enters into the DC power system, resulted in the loss of power source in the transformer station. The loss of external power source in the whole plant is very significant. In this paper, the influence of AC power entering into DC power system on relay protection device is analyzed, the measures to prevent the AC power into DC power system are discussed, the necessity of independent configuration of DC control power system for the 500kV priority power system and 220kV auxiliary power supply system is analyzed.

Alternative off-site power supply improves nuclear power plant safety

2014 ◽  
Vol 71 ◽  
pp. 304-312 ◽  
Author(s):  
Blaže Gjorgiev ◽  
Andrija Volkanovski ◽  
Duško Kančev ◽  
Marko Čepin
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Power Supply ◽  
Nuclear Power ◽  
Plant Safety ◽  
Nuclear Power Plant Safety

Electric Power Supply System Optimal Structure Choice for a Spacecraft with a Nuclear Power Plant

1994 ◽  
Author(s):  
Nikolai I. Artamonov ◽  
Alexander A. Belik ◽  
Kyrill G. Myagkov ◽  
Peter V. Shukalov ◽  
Mohamed S. El-Genk ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Electric Power ◽  
Power Supply ◽  
Nuclear Power ◽  
Power Supply System ◽  
Supply System ◽  
Electric Power Supply ◽  
System Optimal ◽  
Structure Choice
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