KR-20260067235-A - Method and Systemt for signal processing between DCS and MOVs

Abstract

As a preferred embodiment of the present invention, the signal processing system between a power plant main control facility DCS and a plurality of MOVs is characterized by comprising a master unit implemented using an input/output device of the power plant main control facility DCS, a plurality of slave units implemented using an input/output device of each motor-driven valve MOV, and an N-bit binary counter implemented in each of the master unit and the plurality of slave units, which receives the output of a clock signal generator and continuously outputs an N-bit binary number (a natural number N > 2).

Inventors

• 오흥일

Assignees

• 한국전력기술 주식회사

Dates

Publication Date

20260512

Application Date

20241105

Claims (15)

1. A master unit implemented using the input/output devices of the power plant's main control facility DCS (Distributed Control System); Multiple slave units implemented using respective input/output devices of a motor-operated valve (MOV); An N-bit binary counter implemented in each of the above master unit and the above plurality of slave units, receiving the output of a clock signal generator and continuously outputting N-bit (natural number N>2) binary numbers; A signal processing system between a power plant main control facility DCS and a plurality of MOVs, characterized in that the master unit uses the output value of the N-bit binary counter as an identifier for identifying digital information transmitted from each of the plurality of slaves to the master unit and a digital command transmitted from the master unit to at least one of the plurality of slaves.
2. In claim 1, the master part A signal processing system between a power plant main control facility DCS and a plurality of MOVs, characterized by selectively controlling the plurality of slave units using the above identifier.
3. In Article 1, A signal processing system between a power plant main control facility DCS and a plurality of MOVs, characterized in that when 2 N digital commands are output from the N-bit binary counter implemented in each of the plurality of slave units, the master unit is connected to 2 N-3 slaves.
4. In Article 1, A signal processing system between a power plant main control facility DCS and a plurality of MOVs, characterized in that the output of the clock signal generator is input as a clock signal to each of the plurality of slaves through a clock bus, and the output value of the N-bit binary counter implemented in each of the plurality of slaves is synchronized with the clock signal input through the clock bus and is all the same.
5. In Article 1, A signal processing system between a power plant main control facility DCS and a plurality of MOVs, further comprising a synchronization verification unit for verifying synchronization between the master unit and the plurality of slave units; wherein the synchronization verification unit indicates that an error has occurred if the output value of the N-bit binary counter of the master unit and the output value of the N-bit binary counter of each of the plurality of slave units are not identical.
6. In Article 1, A signal processing system between a power plant main control facility DCS and a plurality of MOVs, characterized in that the master unit receives digital information from the plurality of slave units at the input device DI (Digital Input) of the power plant main control facility DCS, and outputs a digital command to at least one of the plurality of slave units at the output device DO (Digital Output) of the DCS to remotely control the plurality of slave units.
7. In claim 1, the master part A signal processing system between a power plant main control facility DCS and a plurality of MOVs, characterized by including a clock signal generator.
8. A step of implementing the master unit using the input/output devices of the power plant's main control facility DCS (Distributed Control System); A step of implementing a plurality of slave units using respective input/output devices of motor-operated valves (MOV); and The method includes the step of receiving the output of a clock signal generator from an N-bit binary counter implemented in each of the master unit and the plurality of slave units, and continuously outputting an N-bit (natural number N>2) binary number. A signal processing method between a power plant main control facility DCS and a plurality of MOVs, characterized in that the master unit uses the output value of the N-bit binary counter as an identifier for identifying digital information transmitted from each of the plurality of slaves to the master unit and a digital command transmitted from the master unit to at least one of the plurality of slaves.
9. In claim 8, the above master part A signal processing method between a power plant main control facility DCS and a plurality of MOVs, characterized by selectively controlling the plurality of slave units using the above identifier.
10. In Article 8, A signal processing method between a power plant main control facility DCS and a plurality of MOVs, characterized in that when 2 N digital commands are output from the N-bit binary counter implemented in each of the plurality of slave units, the master unit is connected to 2 N-3 slaves.
11. In Article 8, A signal processing method between a power plant main control facility DCS and a plurality of MOVs, characterized in that the output of the clock signal generator is input as a clock signal to each of the plurality of slaves through a clock bus, and the output value of the N-bit binary counter implemented in each of the plurality of slaves is synchronized with the clock signal input through the clock bus and is all the same.
12. In Article 8, A signal processing method between a power plant main control facility DCS and a plurality of MOVs, further comprising: a step of indicating that an error has occurred when the output value of the N-bit binary counter of the master unit and the output value of the N-bit binary counter of each of the plurality of slave units are not identical in the synchronization verification unit.
13. In Article 8, A signal processing method between a power plant main control facility DCS and a plurality of MOVs, characterized in that the master unit receives digital information from the plurality of slave units at the input device DI (Digital Input) of the power plant main control facility DCS, and outputs a digital command to at least one of the plurality of slave units at the output device DO (Digital Output) of the DCS to remotely control the plurality of slave units.
14. In claim 8, the above master part A signal processing method between a power plant main control facility DCS and a plurality of MOVs, characterized by including a clock signal generator.
15. A computer-readable recording medium characterized by having a program recorded therein for executing a signal processing method between a power plant main control facility DCS and a plurality of MOVs as described in claim 8.

Description

Method and System for signal processing between DCS and multiple MOVs The present invention relates to a method for performing signal processing between a power plant main control system DCS and a plurality of MOVs. Multiple motor-operated valves (MOVs) are installed in power plants to control processes such as water, air, gas, and steam. Motor-operated valves have a structure in which an electric actuator and a valve are combined. In order to remotely control the motor-driven valve (MOV) from the power plant's main control facility, the Distributed Control System (DCS), 11 signal cables are installed between the power plant's main control facility DCS and the electric actuators constituting the motor-driven valve (MOV). In addition, for each motor-driven valve (MOV), the power plant's main control facility DCS side must be equipped with 6 input devices (DI) and 2 output devices (DO). The number of input/output devices and signal cables required for the DCS, which is the main control system of the power plant, increases in proportion to the product of the number of motor-driven valves (MOVs) installed in the power plant, thereby incurring significant time and high costs in the construction of the power plant. FIG. 1 illustrates an internal configuration diagram of a signal processing system between a power plant main control facility DCS and a plurality of MOVs as a preferred embodiment of the present invention. FIGS. 2A and 2B illustrate an internal circuit diagram of a signal processing system between a power plant main control facility DCS and a plurality of MOVs as a preferred embodiment of the present invention. FIGS. 3A and 3B illustrate an internal configuration diagram of a master unit as a preferred embodiment of the present invention. FIG. 4 illustrates an internal configuration diagram of a slave part as a preferred embodiment of the present invention. FIG. 5 illustrates an internal configuration diagram of a synchronization verification unit as a preferred embodiment of the present invention. Specific embodiments of the present invention will be described in detail below with reference to the drawings. In a preferred embodiment of the present invention, a signal processing system is proposed that significantly reduces the number of input/output devices required to be provided on the DCS side, which is the main control facility of the power plant, and the number of signal cables required between the DCS, which is the main control facility of the power plant, and a plurality of MOVs installed in an adjacent area. FIG. 1 illustrates an internal configuration diagram of a signal processing system between a power plant main control facility DCS and a plurality of MOVs as a preferred embodiment of the present invention, and FIG. 2 illustrates an internal circuit diagram. The signal processing system (100) between the power plant main control equipment DCS and multiple MOVs includes a master unit (110), multiple slave units (120), an N-bit binary counter (112, 122), and a synchronization verification unit (130) that verifies synchronization between the master unit (110) and multiple slave units (120). The master unit (110) is implemented using the input/output device of the power plant's main control facility DCS (Distributed Control System). Multiple slave units (120) are implemented using the input/output devices of each motor-operated valve (MOV). Multiple slave units (120) can be implemented in the form of control logic in the operation and storage device of each motor-operated valve (MOV). An N-bit binary counter (112, 122) is implemented in each of the master unit (110) and the multiple slave units (120), and receives the output of a clock signal generator (114) and continuously outputs an N-bit binary number (a natural number N > 2). The clock signal generator (114) is installed only in the master unit (110), and the output of the clock signal generator (114) is input as a clock signal to each of the multiple slaves (120) through a clock bus, and the output values of the N-bit binary counters implemented in each of the multiple slaves (120) are synchronized with the clock signal input through the clock bus and all become identical. Each output value of the N-bit binary counter (112, 122) is used as an identifier to identify digital information transmitted from each of the multiple slaves (120) to the master unit (110) and digital commands transmitted from the master unit (110) to at least one of the multiple slaves (120). As a preferred embodiment of the present invention, when 2 N digital commands are output from an N-bit binary counter (122) implemented in each of a plurality of slave units (120), the master unit (110) is implemented to be connected to 2 N-3 slaves. Referring to Figure 2, an example of performing signal processing between the power plant main control facility DCS and multiple MOVs will be explained in more detail. Figures 2A and 2B read 24 pieces of digital information from 4