Regulating transformer control circuit for nuclear power station
A voltage regulating transformer and control circuit technology, which is applied in the direction of general control strategy, motor generator control, AC motor control, etc., can solve the problem of insufficient reliability of equipment, and achieve the effect of improving equipment reliability and high control precision
Pending Publication Date: 2021-08-10
PEARL ELECTRIC
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Problems solved by technology
[0003] The control method of the original voltage regulating transformer used in nuclear power plants is the circuit board control method, which has only one protection, and the reliability of the equipment is not high enough.
Method used
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Embodiment Construction
[0026] see figure 2 , is an embodiment of the voltage regulating transformer control circuit for nuclear power plants of the present invention, including a switching power supply VI and a frequency converter VF connected via the start-stop relay K1 and the forward and reverse relay K2, and the frequency converter controls the servo motor M.
[0027] In addition, it also includes a touch screen, a programmable logic controller PLC, a voltage transmitter, the third and fourth travel switches SQ3 and SQ4 for the upper limit, and the first and second travel switches for the lower limit SQ1 and SQ2.
[0028] Among them: the PPI port of the programmable logic controller PLC is externally connected to the touch screen, the 0.5 port on the I side is simultaneously connected to one end of the third stroke switch SQ3 and the fourth stroke switch SQ4 normally open port, and the 0.6 port on the I side is simultaneously connected to the first stroke One end of the normally open port of t...
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The invention discloses a regulating transformer control circuit for a nuclear power station. The regulating transformer control circuit comprises a PLC, a touch screen, a voltage transmitter, a switching power supply, a frequency converter, a servo motor, a start-stop relay (K1) and a forward and reverse rotation relay (K2) and four identical travel switches (SQ1-SQ4), wherein thestart-stop relay (K1) and the forward and reverse rotation relay (K2) are the same, the output end of the PLC is connected with the relay, the start-stop relay is connected with the forward and reverse rotation relay, the forward and reverse rotation relay is connected with the frequency converter through the travel switch, and the frequency converter controls the servo motor. According to the invention, when the input voltage fluctuates within a certain range, the control circuit can control the voltage regulating transformer to enable the output voltage to maintain certain precision and stably output rated voltage so as to maintain the voltage stability of follow-up safety-level equipment and other electric equipment; and the control circuit carries out remote automatic control on the regulating transformer, the control precision is high, the operation is convenient, the PLC replaces the original circuit board to improve the reliability, and the limit control of the travel switch ensures that the equipment is not damaged when a fault occurs.
Description
technical field [0001] The invention relates to a voltage regulating transformer control circuit, in particular to a voltage regulating transformer control circuit for nuclear power plants. Background technique [0002] With the increasingly tense energy demand and the emphasis on environmental protection, as a new energy source with high efficiency and environmental protection, nuclear power has been paid more and more attention and developed in our country. Nuclear power plants have very strict requirements on the safety and reliability of their equipment, especially the equipment in the nuclear island. In order to improve the reliability requirements for safety-level equipment, a new safety-level voltage regulating transformer equipment has been added. As one of the important equipment in the safety level system, the voltage regulating transformer is used to maintain a certain accuracy of the output voltage and stabilize the output rated voltage when the input voltage flu...
Claims
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IPC IPC(8): H02P13/00H02P23/24H02P27/06H02P1/26H02P3/18H02P23/00
CPCH02P1/26H02P3/18H02P13/00H02P23/0004H02P27/06H02P23/24
Inventor 张健飞蔡定国谢玉徽禤冠星
Owner PEARL ELECTRIC