Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency
A frequency control and control method technology, applied in the direction of reducing/preventing power oscillation, single-network parallel feeding arrangement, etc., to achieve the effect of ensuring safe and stable operation
Active Publication Date: 2013-04-10
中广核工程有限公司 +1
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a technical problem that can solve the technical problem that the nuclear power unit participates in the frequency control of the power grid in view of the defect in the prior art that it is impossible to ensure the stable operation of the nuclear power unit while allowing the nuclear power unit to participate in the frequency control of the power grid. Control method and system for nuclear power plant unit frequency to ensure stable operation of nuclear power unit while participating in power grid frequency control
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[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0061] The embodiments of the present invention mainly focus on the operation characteristics of the PWR nuclear power plant, and study the implementation method of frequency control in the nuclear power plant.
[0062] After the steam turbine is connected to the grid, the frequency of the unit and the frequency of the grid are consistent (both 50HZ). When the load (power consumption) of the grid does not match the actual load (power generation) of the unit, the frequency of the grid will change. The specific relationship is a certain functional relationship . The mismatch between the total genera...
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The invention discloses a control method of nuclear power plant unit frequency and a control system of the nuclear power plant unit frequency. The method comprises the steps of judging load control modes of a nuclear power plant unit; adjusting the unit frequency in a frequency contribution method when the nuclear power plant unit runs in a basic load control mode or in an automatic load control mode and power grid frequency changes cause rotating speed changes of a turbine; adjusting the unit frequency in a frequency control method when the nuclear power plant unit runs in a return circuit mode of a load controller with a frequency adjusting function and power grid load changes cause frequency fluctuation; and sending a turbine load reference value, a load controller return circuit input signal, a frequency contribution signal, a frequency control signal, a turbine valve opening reference value signal and a turbine fast load down signal to a reactor control rod system of a nuclear island by the side of the turbine for frequency control of the side of the nuclear island. According to the control method of the nuclear power plant unit frequency and the control system of the nuclear power plant unit frequency, steady running of the nuclear power plant unit is guaranteed when the nuclear power plant unit is used for power grid frequency control.
Description
technical field [0001] The invention relates to the field of frequency control of nuclear power plants, in particular to a method and system for controlling the frequency of nuclear power plant units. Background technique [0002] Frequency is one of the most important operating parameters of a power system, and frequency variation has an important impact on the safe and stable operation of the power system. [0003] The mismatch between the total generating power of the on-grid units and the total grid-connected load will cause fluctuations in the grid frequency. If the grid-connected load is greater than the total power generated by the on-grid units, the grid frequency will decrease, and vice versa. To keep the frequency value of the grid unchanged, the on-grid units are required to automatically or manually change the active power delivered to the grid to balance power and load, that is, frequency control. [0004] After the nuclear power unit is connected to the grid, ...
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Inventor 展晓磊尹刚吕爱国
Owner 中广核工程有限公司