KR100872723B1 - Control method for digital triple module turbine control system with power plant turbine controlling - Google Patents

Abstract

A control method of digital three neutralization turbine protection system for protecting the generating station turbine is provided to confirm all situations at one place and to prevent the generating stop by a single fault since the functions operated in the respective other location are unified through introducing the digital three neutralization system. A control method of digital three neutralization turbine protection system for protecting the generating station turbine comprises following steps: a step for being input signals after dividing one input signal into three independent channels(Input Leg A,B,C) in the input processing unit(10); a step for sending logic processed value to the signal output processing unit(30) after the signal is delivered to the three independent main processor (A,B,C) through a control unit(20) and three control processors individually perform the turbine protection program defined in advance; a step for being inputted the signal output processing unit the signal transmitted from three control units by the signal output processing part and outputting one value through the voter circuit after the main processor(A,B,C) performs the respective logic with the program defined in advance and the signal is outputted while communicating through the triBus.

Description

Control method for digital triple module turbine control system with power plant turbine controlling}

The present invention relates to a control method of a digital triple turbine protection system for power plant turbine protection, and more particularly to receiving a fault signal from a nuclear power plant turbine system to safely stop and protect a turbine, resulting in product quality. It greatly improved the reliability and reliability so that consumers could plant good images.

As is well known, the turbine protection system of a power plant is a system that should ensure safety and reliability, and it is necessary to prevent operational failure due to a single failure in advance, thereby improving the operational efficiency of the turbine.

The existing turbine protection system consisted of relays, operation switches, and indicators. The relays were combined to form logic and to perform turbine protection. Since they were manipulated and displayed at different locations, they were difficult to monitor and manipulate. The deterioration caused by long-term use of the relay has degraded the soundness, and there are many difficulties in maintenance due to the suspension of production of spare parts. In addition, it is difficult to manage because the signals related to turbine protection are distributed in four cabinets, and because they are configured using relays, historical data for monitoring and checking signal trends cannot be stored, and the operator can see the turbine protection system at a glance. It is difficult to confirm the situation.

On the other hand, there is a prior art [Patent Document] Korean Patent Application No. 2004-0060207 (name: triplex digital turbine control system for controlling the turbine system of the power plant).

The conventional triple digital turbine control system is a so-called turbine valve control system that controls the speed of a turbine driving a generator. After the turbine speed is increased from the low speed to the rated speed, the generator feeds into the power system. It is a facility that controls the turbine valve to regulate the electric output and maintain the rated frequency by operating.

However, the above-described conventional technology is completely different from the digital turbine protection system, and in particular, the turbine system is stably stopped in an emergency to protect the turbine, and the turbine protection signal is input to program the sequence to stop the turbine stably. There is a big problem that can not output the signal.

In addition, the turbine generator control and protection system of the power plant can be classified into three core systems, the first of which is the conventional turbine control system, the second, generator field power source that controls the generator effective output by controlling the turbine valve Generator control system that controls generator terminal voltage and reactive power by controlling, and third, turbine protection system that reliably stops turbine by processing turbine protection signal. The first and second systems are already digital triple The patent application is registered as a system, but the third turbine protection system has not been developed yet.

In addition, the prior art is composed of a sequence control using a contact point relay, and has been pointed out as a big problem that the reliability of the equipment is degraded due to aging deterioration with long-term use.

The present invention has been made to solve the problems of the prior art as described above, to implement a system by introducing a digital triple system in order to prevent the power generation stop by a single failure to integrate the functions that were operated at different locations The first purpose is to configure the system so that all situations can be checked in one place, and the second purpose is to operate the function so that the operator can easily grasp the driving status by using the GUI program on the computer. The third purpose is designed to be implemented simply by changing or expanding a specific module when the device needs to be changed or expanded in the future, and the fourth purpose is to prevent malfunction due to a single failure. For this purpose, multiplexing controller was adopted to construct the multiplexing system. One or two elements consisting of multiplexing allow continuous operation by the remaining sound controller even if it fails to perform its function. The sixth purpose is the on-line diagnosis function so that it can be checked immediately when a system error occurs. It is to provide hot standby function so that it can be replaced due to module failure in the middle, and the seventh purpose is to digitally triple the power plant turbine protection, which greatly improves the quality and reliability of the product, so that consumers can plant a good image. Provides a control method for a turbine protection system.

In order to achieve the above object, the present invention provides a digital triple controller comprising a control controller, a signal input / output processor, and a control logic processor; An operation control panel comprising a GUI processing unit, a data storage processing unit, and a communication processing unit; In a method of controlling a turbine system of a power plant by a trip relay that actually outputs a turbine protection signal, three independent channels (Input Leg (A, B, C) are provided in the input processing unit for one input signal. Receiving a signal by separating each); The signal is transmitted to three independent main processors A, B, and C through a control controller, and each of the three control controller processors individually executes a predefined turbine protection program and communicates with each other. Monitoring and simultaneously sending logic processed values to the signal output processor; And the main processors A, B, and C each perform logic by a predefined program to communicate with each other through a TriBus, and output a signal. The signal output processor may output signals from the three control controllers 20. It receives the input and outputs a value through a voter circuit; provides a control method of a digital triple turbine protection system for power plant turbine protection, characterized in that it comprises a.

As described in detail above, the present invention implements a system by introducing a digital triple system in order to prevent power generation stoppage due to a single failure. I would have to.

In addition, the present invention implements and arranges the graphic for each operation item so that an operator can easily grasp the driving state by using a GUI program on the computer to manually monitor the function.

In addition, the present invention is designed to be easily implemented only by changing or expanding a specific module when a change or expansion work of the device is required in the future.

The present invention also employs a multiplexing controller by employing a triple controller to prevent a malfunction due to a single failure.

In addition, the present invention is to enable the continuous operation by the remaining sound controller even if one or two elements consisting of multiplexing error does not perform its function.

In addition, the present invention provides a hot standby function so that an on-line diagnostic function can be immediately checked when a system error occurs, thereby enabling replacement due to a module failure during operation.

The present invention is a very useful invention that can significantly improve the quality and reliability of the product due to the above-described effect so that consumers can plant a good image.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention for achieving this effect are as follows.

The control method of the digital triple turbine protection system for power plant turbine protection applied to the present invention is configured as shown in Figs.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The following terms are terms set in consideration of functions in the present invention, which may vary depending on the intention or custom of the producer, and their definitions should be made based on the contents throughout the specification.

First, the present invention includes a digital triple controller comprising a control controller, a signal input / output processor and a control logic processor as shown in FIG. 1; An operation control panel comprising a GUI processing unit, a data storage processing unit, and a communication processing unit; In addition, the technical configuration and control method are included by a trip relay that actually outputs a turbine protection signal.

At this time, the present invention is divided into three independent channels (Input Leg (A, B, C)) in the input processing unit 10 for each input signal as shown in FIG. do.

In addition, the signal is transmitted to the three independent main processors (A, B, C) through the control control unit 20, each of the three control control processors to perform a predefined turbine protection program and communicate with each other Through the steps of monitoring the input state and at the same time to send a logic-processed value to the signal output processor 30, respectively.

The main processors A, B, and C perform logic by using a predefined program to communicate with each other through TriBus, and output a signal, but the signal output processor 30 has three control controllers 20. It receives the signal sent from and outputs one value through the voter circuit to operate the control method of digital triple turbine protection system for power plant turbine protection.

In addition, the GUI processor applied to the present invention implements a graphic display and operation of the operation data so that the original power source can easily check the operating state, the data storage processor stores the input data to provide a variety of information to the operator The communication processor connects the GUI processor and the triple controller to transmit input / output data through TCP / IP communication.

In addition, the trip relay is a final processing unit that actually outputs the turbine protection signal. The trip relay is configured in duplicate to prevent the loss of the turbine protection function due to a single failure.

In the drawing, reference numeral 1 is a digital triplet main chassis, 2 is a digital triplet expansion chassis, 3 is a local OIS, 4 is a power supply, 5 is a trip relay, and 6 is a terminal block.

<Example>

The turbine protection signal is composed of 13 signals.The digital turbine protection system receives this signal to perform internal logic, outputs the final turbine trip signal, and checks various alarms and trend values in the OIS. Support it whenever possible. All signals are made of digital signal processing through tripled hardware and designed with multiplexing concept to prevent malfunction even in case of hardware failure during normal operation.

turn Stop sign channel Delay time Alarm Stop Purpose of protection One Rx trip 1/2 none none Rx BKR Trip Rx / TBN thermal equilibrium 2 S / G Hi Level 2/3 none SP ± 5% 67% Carryover prevention 3 Stator Cooling Water Temp Hi 2/4 none 60 ℃ 75 ℃ Stator coil deterioration prevention 4 Lub Oil Fail 2/4 10 sec 0.95 bar 0.69 bar Oil film breakage, damage to turbine bearing 5 GEN Trip 1/1 none none 86GPM TBN Overspeed Protection 6 Thrust Brg Wear Hi 2/4 10 sec ± 1.0mm ± 1.3mm Shaft movement prevention 7 CDSR Lo Vaccum 2/4 10 sec -940 mbar -860 mbar TBN wing damage prevention 8 Governor failure 2/3 none 1ch Fail 2ch Fail TBN protection 9 Stator flow lo 2/4 60 seconds Runback 80% of normal Stator coil deterioration prevention 10 TBN Overspeed 1/2 none none 1980 rpm TBN shaft / wing damage prevention 11 Hot gas temp hi 2/4 5 sec 60 ℃ 75 ℃ Generator temperature rise prevention 12 Emergency P / B 1/2 none none manual Driver judgment 13 AMS 1/2 none none TBN protection

The functional implementation of the turbine protection system of the present invention will be described in more detail as follows.

That is, FIG. 9 shows the main screen as follows.

① TBN TRIP: It is displayed on all screens. In normal condition, the background color is displayed in white and when the Turbine Trip signal is output, it blinks in red.

② ARMING: It is displayed on all screens and the background color is white when arming in the turbine governor, and blinks yellow when arming is released.

③ TEST: It is displayed on all screens. In normal condition, the background color is white and Arming Bypass Switch 1, Condenser Vacuum TEST Switch 2, LUB Oil TEST Switch 3, Stator Coolant Flow Test Switch 4 are set to T1 or T2 position. Flashes yellow when the Overspeed Test is in progress.

④ ALARM: It is displayed on all screens. In normal operation, the background color is displayed in white and when any alarm occurs on the Alarm screen, it blinks in yellow.

⑤ SIG VLD: It is displayed on all screens. In normal case, the background color is displayed in white and if the analog signal of condenser vacuum, LUB Oil, stator cooling water flow is out of range (less than 3.94mA or more than 20.4mA), it is judged as a sensor failure. Is triggered and flashes yellow.

⑥ BYPASS: It is displayed on all screens and is used to bypass the signals of condenser vacuum, LUB Oil and stator cooling water flow. Bypass, Turbine Trip signal is not output to the bypassed signal.

⑦ Date & Time: Displayed on all screens and displays current date and time. The time displays the computer's time and changes as the computer time changes.

After that, ① ~ ⑦ items are displayed on all screens.

⑧ Press button to switch screen and move to screen displayed on button.

⑨ TS1: When testing Stator Cooling Water Flow Test and Condenser Vacuum with Arming Bypass Switch, if the armoring condition of turbine governor is not satisfied, select TEST1 button to turn TEST1 red and proceed to Turbine Arming Bypass mode. Selecting the NORMAL button toggles TEST1 from red to gray and releases the turbine arming bypass mode.

In addition, FIG. 10 applied to the present invention performs the following functions as the TPC LOGIC screen.

That is, ① TBN Trip signal source, Stator CW Flow Low, LUBE Oil Pressure Low, Condenser Vacuum Low receives 4 ~ 20mA signal from transmitter and generates TBN Trip signal by 2/4 Logic. TBN Trip signal.

At this time, Stator Cooling Water Flow receives signals from transmitters (FT213 / 1, FT213 / 2, FT216 / 1, FT216 / 2) and generates TBN Trip signal by 2/4 logic. Setpont is 89 m3 / hr and it is displayed in green to red when it is below Setpont. Turbine trip signal does not occur when only FT213 / 1 and FT213 / 2 are operated or only FT216 / 1 and FT216 / 2 are operated. If 2/4 Logic is satisfied, 60sec Delay Text blinks red and MPP68A, MPP68B pump start signal is generated from TPC3. If the condition is not cleared after 10 seconds, the Stator Cooling Water Flow Low Trip Sequence Start alarm is output to the Governor. After 60 seconds, Reset1 button is displayed in red, TBN TRIP and GEN Trip are displayed in red, and Turbine Trip and Generator Trip occur. After TBN TRIP, Reset1 button can be reset when 2/4 Logic condition is released. TBN Trip can be reset by resetting Trip Reset12 when Reset1 button is reset. Trip sequence stops when Trip condition is canceled while 60sec Delay Text is blinking. When the transmitter signal reaches the Out of Range (below 3.94mA or above 20.4mA), it blinks amber and the transmitter out of range is excluded from the 2/4 logic. If Bypass1 button is selected, Bypass1 button blinks yellow and TBN TRIP by Stator Cooling Water Flow Low does not occur, but MPP68A, MPP68B pump start signal occurs. The engineering value of the transmitter signal 4-20 mA is 0-259.63 m3 / hr.

In addition, LUB Oil Pressure receives signals from transmitters (PT1 / 1, PT1 / 2, PT2 / 1, PT2 / 2) and generates TBN Trip signals by 2/4 logic. Setpont is 0.69 bar and it is displayed in green to red when it is below Setpont. Turbine trip signal does not occur if only PT1 / 1, PT1 / 2 is operated or only PT2 / 1, PT2 / 2 is operated. If 2/4 Logic is satisfied, 10sec Delay Text blinks red and MPP70, MPP71 pump start signal is generated from TPC3. After 10 seconds, Reset2 button and TBN TRIP are displayed in red and Turbine Trip occurs. After 30 seconds, Generator Trip occurs. After TBN TRIP, 2/4 Logic condition should be released to reset Reset2 button. Reset2 button must be reset to reset Trip Reset12 to reset TBN Trip. Trip sequence stops when Trip condition is released while 10sec Delay Text is blinking. When the transmitter signal reaches the Out of Range (below 3.94mA or above 20.4mA), it blinks amber and the transmitter out of range is excluded from the 2/4 logic. If Bypass2 button is selected, Bypass2 button blinks yellow and TBN TRIP by LUB Oil Pressure Low does not occur, but MPP70 and MPP71 pump start signals occur. The engineering value of the transmitter signal 4-20 mA is 0-4 bar.

In addition, Condenser Vacuum Pressure receives signals from transmitters (PT537A, PT538A, PT539A, PT540A) and generates TBN Trip signals by 2/4 logic. The setpont is 153 mbarA and is displayed in green to red above the setpont. Turbine trip signal does not occur when only PT537A, PT538A or PT539A, PT540A operates. If 2/4 Logic is satisfied, 10sec Delay Text blinks red, and after 10 seconds, Reset3button and TBN TRIP are displayed in red and Turbine Trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, Reset 3 button can be reset only when 2/4 Logic condition is released. TBN Trip can be reset by resetting Trip Reset 12 when Reset 3 button is reset. Trip sequence stops when Trip condition is released while 10sec Delay Text is blinking. When the transmitter signal reaches the Out of Range (below 3.94mA or above 20.4mA), it blinks amber and the transmitter out of range is excluded from the 2/4 logic. If Bypass3 button is selected, Bypass3 button blinks yellow and TBN TRIP by Condenser Vacuum Pressure Low does not occur. The engineering value of the transmitter signal 4-20 mA is 20-350 mbarA.

In addition, TBN Overspeed immediately generates TBN Trip signal when only one signal of OSS1a (Overspeed Ring # 1) and OSS2a (Overspeed Ring # 2) contact signal is input. When the Overspeed Ring # 1 (OSS1a) signal is input, 'OSS1a' is displayed in red, Reset4 button and TBN TRIP are displayed in red, and a Turbine Trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, 'OSS1a' should be displayed in green to reset Reset4 button. Reset4 button must be reset to reset Trip Reset12 to reset TBN Trip. When the Overspeed Ring # 2 (OSS2a) signal is input, 'OSS2a' is displayed in red, Reset5 button and TBN TRIP are displayed in red, and a Turbine Trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, 'OSS2a' should be displayed in green to reset Reset5 button. Reset5 button must be reset to reset Trip Reset12 to reset TBN Trip.

REACTOR TRIP, S / G LEVEL HI, and AMS INITIATE input three trip signals by TRAIN and input them as contact signal. Even if only one signal of 'Train A' or 'Train B' contact signal is input, it immediately generates TBN Trip signal. When Train A signal is input, 'Train A' is displayed in red, Reset6 button and TBN TRIP are displayed in red, and a Turbine Trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, 'Train A' should be displayed in green to reset Reset6 button. Reset6 button must be reset to reset Trip Reset12 to reset TBN Trip. When Train B signal is input, 'Train B' is displayed in red, Reset7 button and TBN TRIP are displayed in red and Turbine Trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, 'Train B' should be displayed in green to reset Reset7 button. Reset7 button must be reset to reset Trip Reset12 to reset TBN Trip.

In addition, STATOR COOLING WATER TEMP HI is inputted as a contact signal and when a signal is input, it immediately generates TBN Trip signal. When the STATOR COOLING WATER TEMP HI signal is input, 'TIS223' is displayed in red, Reset8 button and TBN TRIP are displayed in red, and a trip trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, 'TIS223' should be displayed in green to reset Reset8 button. Reset8 button must be reset to reset Trip Reset12 to reset TBN Trip.

In addition, GOVERNOR FAILURE is inputted as a contact signal and when a signal is inputted, TBN Trip signal is immediately generated. When GOVERNOR FAILURE signal is input, 'GOV' is displayed in red, Reset9 button and TBN TRIP are displayed in red, and Turbine Trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, 'GOV' should be displayed in green to reset Reset9 button, and Reset9 button must be reset to reset Trip Reset12 to reset TBN Trip.

In addition, EMERGENCY P / B is inputted as contact signal and signal is input by emergency pushbutton in main control room or TPC1 and immediately generates TBN Trip signal. When the Emergency Pushbutton signal is input, 'ESPB' is displayed in red, TBN TRIP is displayed in red, and a Turbine Trip occurs. After 30 seconds, a generator trip occurs. After TBN TRIP, 'ESPB' should be displayed in green so that Trip Reset12 can be reset to reset TBN Trip.

In addition, HOT GAS TEMP HI is inputted as a contact signal and when a signal is input, TBN Trip signal is generated after 5sec. When HOT GAS TEMP HI signal is input, 'TE904 ~ 7 is displayed in red, 5sec Delay Text is blinking in red, 5 seconds later, Reset10 button is displayed in red, TBN TRIP and GEN Trip are displayed in red, Turbine Trip and Generator Trip occurs. After TBN TRIP, 'TE904 ~ 7' should be displayed in green to reset Reset10 button. If Reset10 button is reset, Trip Reset12 can be reset to reset TBN Trip. Trip sequence stops when Trip condition is canceled while 5sec Delay Text is blinking.

In addition, THRUST BRG WEAR HI is inputted as a contact signal, and when a signal is inputted, a TBN Trip signal is generated after 10 sec. When the THRUST BRG WEAR HI signal is input, 'UxSTx427' is displayed in red, 10sec Delay Text flashes in red, 10 seconds later, Reset11 button is displayed in red, TBN TRIP and GEN Trip are displayed in red, Turbine Trip and Generator Trip occurs. After TBN TRIP, 'UxSTx427' should be displayed in green to reset Reset11 button, and Reset11 button should be reset to reset Trip Reset12 to reset TBN Trip. Trip sequence stops when Trip condition is released while 10sec Delay Text is blinking.

② Bypass Reset1 ~ 3 button can be selected by reset each of Bypass1 ~ 3 button blinking amber. If Reset1 ~ 3 button is displayed in red before selecting Bypass Reset, reset Reset1 ~ 3 button to check if the button color is gray and perform Bypass Reset. If you reset Bypass while Reset1 ~ 3 button is displayed in red, TBN Trip occurs.

In addition, Figure 11 is an analog signal display window of the present invention performs the following functions.

In other words, the signal of Stator Cooling Water Flow, LUBE Oil Pressure, Condenser Vacuum Transmitter is indicated by current (mA) and Process Value.

The Signal (mA) column displays the transmitter signal as a current (mA) signal.

The Process Value column displays the current (mA) signal converted to engineering value.

Stator Cooling Water Flow: 4 ~ 20mA-> 0 ~ 259.63 m3 / hr

LUBE Oil Pressur: 4 ~ 20mA-> 0 ~ 4 bar

Condenser Vacuum: 4 ~ 20mA-> 20 ~ 350 mbarA

The Setpoint column displays the Trip Setpoint of each signal.

The Signal State column indicates the Out of Range of each transmitter signal. If the current (mA) signal is below 3.94mA or above 20.4mA, it is regarded as sensor failure and blinks from green to yellow.

In addition, Figure 12 is a screen window showing the present invention Stator Cooling Water Trend performs the following functions.

In other words, this screen shows the Real Time Trend of Stator Cooling Water Flow (FT213 / 1, FT213 / 2, FT216 / 1, FT216 / 2).

Figure 13 is a screen window showing the present invention LUBE Oil Trend performs the following functions.

In other words, this screen shows Real Time Trend of LUB Oil (PT1 / 1, PT1 / 2, PT2 / 1, PT2 / 2).

14 is a screen window showing the condenser vacuum trend of the present invention performs the following functions.

In other words, this screen shows the Real Time Trend of Condenser Vacuum (PT537A, PT538A, PT539A, PT540A).

15 is a screen window showing the present invention the Stator Cooling Water Test performs the following functions.

That is, the Stator Cooling Water Flow Transmitters (FT213 / 1, FT213 / 2, FT216 / 1, FT216 / 2) are displayed in green to red when the setpoint (89 m3 / hr) or less. To test, TS4 switch should be changed to TEST mode. To test the FT213 / 1 and FT216 / 1, press the TEST1 button of the TS4 switch so that the TEST1 button is displayed in red. At this time, 'GEN Stator C.W Flow Test' blinks amber. When the FT213 / 1 and FT216 / 1 signals are adjusted to be below the setpoint (89 m3 / hr), they are displayed in red and the 'GEN Stator C.W Flow Low Low' and 'GEN Stator C.W Flow Low Low' flicker in yellow. In addition, start stator coolant pump A (orB) is displayed in red and start the pump. 60s Deley Text flashes red and TBN TRIP occurs after 60 seconds. To reset TBN TRIP, adjust transmitter signal over Setpoint (89 m3 / hr) and reset on TPC LOGIC screen. If the TEST1 button is red, TBN Trip occurs only by FT213 / 1 and FT216 / 1, and TBN Trip does not occur by FT213 / 2 and FT216 / 2.

If you press the NORMAL button to end the test, the test mode is canceled.

To test the FT213 / 2 and FT216 / 2, press the TEST2 button of the TS4 switch so that the TEST2 button is displayed in red. At this time, 'GEN Stator C.W Flow Test' blinks amber. When the FT213 / 2 and FT216 / 2 signals are adjusted to be below the setpoint (89 m3 / hr), they are displayed in red, and the 'GEN Stator C.W Flow Low Low' and 'GEN Stator C.W Flow Low Low' blink. In addition, start stator coolant pump A (orB) is displayed in red and start the pump. 60s Deley Text flashes red and TBN TRIP occurs after 60 seconds. To reset TBN TRIP, adjust transmitter signal over Setpoint (89 m3 / hr) and reset on TPC LOGIC screen. If the TEST2 button is red, TBN Trip occurs only by FT213 / 2 and FT216 / 2, and TBN Trip does not occur by FT213 / 1 and FT216 / 1.

16 is a screen window showing the present invention LUBE Oil Test performs the following functions.

That is, the LUBE oil pressure transmitters (PT1 / 1, PT1 / 2, PT2 / 1, PT2 / 2) are displayed in green to red when the setpoint (0.69 bar) or less. To test, TS3 switch should be converted to TEST mode. To test PT1 / 1, PT2 / 1, press TEST1 button of TS3 switch so that TEST1 button is displayed in red. At this time, 'LUB OIL PRESS TRIP ON TEST' blinks amber. Adjust PT1 / 1, PT2 / 1 signal to below Setpoint (0.69 bar) and it will be displayed in red and 'LUB OIL PRESS LOW LOW' will flash yellow. Also, the DC / AC lube pump start is displayed in red and the pump starts. The 10s Deley Text will flash red and a TEST TRIP will occur after 10 seconds. TEST TRIP is to check only LOGIC without actually TBN TRIP. To reset TEST TRIP, adjust transmitter signal over Setpoint (0.69 bar) and press Reset button to reset. If the TEST1 button is red, the TEST Trip occurs only by PT1 / 1 and PT2 / 1, and does not occur by PT1 / 2 and PT2 / 2.

If you press the NORMAL button to end the test, the test mode is canceled.

Also, to test PT1 / 2 and PT2 / 2, press TEST2 button of TS3 switch so that TEST2 button is displayed in red. At this time, 'LUB OIL PRESS TRIP ON TEST' blinks amber. Adjust PT1 / 2, PT2 / 2 signal to below Setpoint (0.69 bar) and it will be displayed in red and 'LUB OIL PRESS LOW LOW' will flash yellow. Also, the DC / AC lube pump start is displayed in red and the pump starts. The 10s Deley Text will flash red and a TEST TRIP will occur after 10 seconds. TEST TRIP is to check only LOGIC without actually TBN TRIP. To reset TEST TRIP, adjust transmitter signal over Setpoint (0.69 bar) and press Reset button to reset. If the TEST2 button is red, the TEST Trip occurs only by PT1 / 2 and PT2 / 2 and the TEST Trip does not occur by PT1 / 1 and PT2 / 1.

17 is a screen showing the capacitor vacuum test of the present invention performs the following functions.

In other words, the CONDENSER VACUUM transmitters (PT537A, PT538A, PT539A, PT540A) are displayed in green to red when the setpoint (153 mbarA) is below. To test, TS2 switch should be converted to TEST mode. To test PT537A and PT539A, press TEST1 button of TS2 switch so that TEST1 button is displayed in red. At this time, 'LO Vac On Test' blinks amber. Adjust the PT537A, PT539A signal so that it is below the setpoint (153 mbarA) and it will be displayed in red and 'CDSR VAC PRESS LOW LOW' will flash yellow. The 10s Deley Text will flash red and a TEST TRIP will occur after 10 seconds. TEST TRIP is to check only LOGIC without actually TBN TRIP. To reset the TEST TRIP, adjust the transmitter signal above the setpoint (153 mbarA) and press the Reset button to reset. If the TEST1 button is red, the TEST Trip occurs only by PT537A and PT539A, and the Test Trip does not occur by PT538A and PT540A.

If you press the NORMAL button to end the test, the test mode is canceled.

Also, to test PT538A and PT540A, press TEST2 button of TS2 switch so that TEST2 button is displayed in red. At this time, 'LO Vac On Test' blinks amber. When the PT538A and PT540A signals are adjusted to be below the setpoint (153 mbarA) they will be displayed in red and the 'CDSR VAC PRESS LOW LOW' will flash amber. The 10s Deley Text will flash red and a TEST TRIP will occur after 10 seconds. TEST TRIP is to check only LOGIC without actually TBN TRIP. To reset the TEST TRIP, adjust the transmitter signal above the setpoint (153 mbarA) and press the Reset button to reset. If the TEST2 button is red, the TEST Trip occurs only by PT538A and PT540A and the TEST Trip does not occur by PT537A and PT539A.

18 is a screen window showing the present invention the turbine overspeed test performs the following functions.

In other words, Turbine Onload Overspeed Ring # 1 Test

Under normal conditions, the Turbine Overspeed Test screen displays RESET O / SPEED RING # 1 and RING # 2 in red and the rest in green.

Press the button of 'On Load Over Speed Select'. If you select 'yes' to the question 'Do you want to select TBN ONLOAD O / SPEED TEST?', The 'On Load Over Speed Selected' lamp will light.

If you press' Over Speed Ring # 1 Select 'button and select' TBN O / SPEED TEST 'RING # 1', 'Yes' is asked, it works as follows.

'Over Speed Ring-1 Selected' Lamp: Lights up

Isolation Over Speed Test Ring # 1 Isolated 'Lamp: ON

Press 'On Load Over Speed Test Ring # 1 Initiate' button and select 'Yes' for 'ONLOAD O / SPEED TEST' RING # 1 '?' Ring-1 Initiate 'button blinks yellow and operates as follows.

At this time, 'On Load Over Speed Test Ring # 1 Initiated' Lamp: Lights

'Reset Over Speed Ring # 1' Lamp: Off

'' On Load Over Speed Test Ring # 1 Initiate '' button blinks yellow when Ring # 1 is activated.

After about 30 seconds, press 'Over Speed Ring # 1 Reset' button and select 'Yes' for 'O / SPEED TEST' RING # 1 '?', 'Over Speed Ring #' 1 Reset 'button blinks yellow and operates as follows.

'Reset Over Speed Ring # 1' Lamp: Lights up

'Over Speed Ring # 1 Selected' Lamp: OFF

'On Load Test Select' Lamp: Off

Press 'Over Speed Ring # 1 Reset Isolation' button and select 'Yes' for 'O / SPEED TEST' RING # 1 ISOLATION '?', 'Over Speed Ring # 1 Reset' Isolation 'lamp goes out.

The remaining Turbine Onload Overspeed Ring # 2 Test and Turbine Off_Load Overspeed Ring # 1, 2 Test are similar to those described above, and thus detailed descriptions thereof will be omitted.

On the other hand, the present invention may be variously modified and may take various forms in applying the above configuration.

And it is to be understood that the invention is not limited to the specific forms referred to in the above description, but rather includes all modifications, equivalents and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood that.

The technical idea of the control method of the digital triple turbine protection system for the power plant turbine protection of the present invention is that the same result can be repeatedly performed, and in particular, by implementing the present invention, it is possible to promote technology development and contribute to industrial development. It is worth doing.

1 is a digital triple turbine protection system for the power plant turbine protection of the present invention

        Overall schematic.

2 is a block diagram showing a triple structure and principle of the present invention digital controller.

Figure 3 is a block diagram showing the configuration and operation of the trip relay of the present invention.

4 is a configuration of the present invention turbine protection system equipment (TPC3).

5 is an overall configuration diagram of the present invention the turbine trip logic.

6 is a block diagram of the present invention stator cooling water flow logic.

7 is a schematic diagram of the present invention lubricant pressure logic.

8 is a condenser vacuum logic diagram of the present invention.

9 is a main window of the present invention digital triple turbine protection system.

10 is a logic screen of the present invention in which all sources for a turbine trip are displayed.

         Screen window.

11 is the present invention analog signal window.

12 is a screen window showing the present invention Stator Cooling Water Trend.

Figure 13 is a window showing the present invention LUBE Oil Trend.

14 is a window showing the present invention condenser vacuum trend.

15 is a screen window showing the present invention Stator Cooling Water Test.

Figure 16 is a screen window showing the present invention LUBE Oil Test.

17 is a window showing the present invention capacitor vacuum test.

18 is a window showing the present invention turbine overspeed test.

<Explanation of symbols for the main parts of the drawings>

1: digital triplex main chassis 2: digital triplex expansion chassis

3: local OIS 4: power supply

5: trip relay 6: terminal block

10: input processing unit 20: control control unit

30: signal output processor

Claims (3)

A digital triple controller comprising a control controller, a signal input / output processor, and a control logic processor; An operation control panel comprising a GUI processing unit, a data storage processing unit, and a communication processing unit; And in the method of controlling the turbine system of the power plant by a trip relay (Trip Relay) which actually outputs the turbine protection signal, Receiving input signals by separating the input signals into three independent channels (Input Leg (A, B, C)) in the input processing unit 10 for one input signal; The signal is transmitted to each of the three independent main processors A, B, and C through the control controller 20, and the three control control processors individually execute a predefined turbine protection program and communicate with each other. Monitoring the input state and simultaneously sending logic processed values to the signal output processor 30; And The main processors A, B, and C perform logic by using a predefined program to communicate with each other through the TriBus, and output a signal, but the signal output processor 30 is sent from the three control controllers 20. And receiving a signal and outputting one value through a voter circuit. The control method of a digital triple turbine protection system for power plant turbine protection, comprising: a. According to claim 1, The GUI processing unit is a graphic display and operation of the operation data is implemented so that the original power source can easily check the operating state, the data storage processing unit stores the input data to provide a variety of information to the operator, the communication processing unit The control method of the digital triple turbine protection system for power plant turbine protection, characterized in that for connecting the GUI processing unit and the triple controller to transmit the input and output data by TCP / IP communication. delete

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