KR200267127Y1 - watching performance device tendum style of diesel generator for atomic energy power station - Google Patents

Abstract

The present invention is a device for diagnosing the performance of emergency diesel generators that require high reliability. The emergency diesel generator of a nuclear power plant should start within 10 seconds after receiving the start signal to maintain the rated voltage and frequency and supply power to the load.In this process, the overspeed trip or the two engines on both sides In the case of a tandem type emergency diesel generator (FIG. 3) that generates power by a generator, tripping may occur if the loads of both engines are not balanced, and an accident may occur in which a rubber connection connecting the engine and the generator is broken. has exist. Since such load imbalance and trip occurs within a very short time, it is necessary to acquire controller input / output signal, response signal of engine and generator in real time and use it for diagnosis. The present invention acquires the engine exhaust gas temperature, generator bearing temperature, winding temperature, voltage, power, and frequency signals, displays them in graphs, and stores the results in a database. The controller also affects engine performance sensitively. Provides information to grasp the engine's dynamic characteristics by acquiring input / output

Description

Watching performance device tendum style of diesel generator for atomic energy power station}

The present invention relates to a performance monitoring device for a tandem diesel generator for a nuclear power plant. More specifically, it collects control variables for diagnosing a change in performance of a controller controlling an engine and a generator, and in particular, outputs between two engines of a tandem engine. It provides a device for diagnosing and monitoring the dynamic characteristics of a controller for balance. It is designed as a mobile portable computer system and can be used to diagnose several diesel generators installed in a nuclear power plant with a single system. The present invention relates to a tandem diesel generator performance monitoring device.

The emergency diesel generator is a very important safety system that supplies power to the facilities needed to safely shut down a nuclear power plant in case of an outage of the external power system of the nuclear power plant. For this reason, tests and inspections are carried out periodically so that they are always operational. However, if an abnormal condition such as a serious failure or start-up failure occurs, it takes time to repair or test, and the utilization rate decreases. Therefore, continuous condition monitoring and analysis, that is, selecting appropriate performance variables to identify the condition and analyzing the trend, needs to detect deterioration or abnormal condition before proceeding to failure. In order to support such monitoring and analysis, the present invention has been developed for automated data collection, management and processing.

Existing diesel engine or generator monitoring system does not set control variables as status monitoring variables, so it is impossible to grasp the dynamic performance of controllers that are sensitive to changes in performance. -485 Communication signal processing cannot be performed simultaneously. Especially in the case of tandem diesel generators, if the dynamic characteristics of the controller are not precisely adjusted, the output between the engines is unbalanced and the failure of the shaft is very likely to occur due to the torsion or vibration of the shaft. . In addition, data sharing was difficult due to not using a commercial database. In the conventional data collection device, since the storage capacity is not large, the collected data should be periodically backed up to another storage medium.

In order to solve the above problems, an object of the present invention is to collect control variables for diagnosing changes in performance of a controller controlling an engine and a generator, and in particular, to determine dynamic characteristics of a controller for output balance between two engines of a tandem engine. The present invention provides a device for diagnosis and monitoring, and is designed to be a portable computer system that can be moved to realize economic benefits by diagnosing several diesel generators installed in a nuclear power plant with one system.

In addition, the present invention uses a high-performance computer and a large capacity hard disk, and a network interface card is built in to provide convenience for easily backing up the past data through an intranet.

1 is a block diagram of a performance monitoring device block for a tandem diesel generator for a nuclear power plant according to an embodiment of the present invention.

2 is an overall block diagram of a tandem diesel generator for a nuclear power plant.

Description of the main parts of the drawing

10: engine 11: fuel rack position sensor

20: generator 30: proportional calculus controller

40: load sharing controller 100: portable computer

200: multi-function A / D converter 300: analog signal processor

400: RS-485 communication unit 500: network interface unit

600: monitoring device

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the most preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. . Other objects, features, and operational advantages, including the purpose, working effects, and the like of the present invention will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred examples to help those skilled in the art among various possible examples, and the technical spirit of the present invention is not necessarily limited or limited only by the embodiments. Various changes and modifications are possible within the scope without departing from the technical spirit of the present invention, as well as other embodiments that are equally clear.

The present invention relates to a device capable of monitoring the performance of a tandem diesel generator for a nuclear power plant. As shown in FIG. 1 or FIG. 2, the emergency diesel engine controller 80 has a left side around the generator 20. The engine 10 to which the fuel rack position sensors 11 are connected to the right side, the proportional calculus controller 30 for controlling the driving state of the generator 20, the proportional calculus controller 30 and the fuel rack position. The load distribution controller 40, which allows the load distribution state to be controlled from the signal sensed by the sensor 11, is connected to the basic configuration.

The emergency diesel engine controller 80 is a configuration in which a temperature scanner 70 capable of reading a temperature change of an engine or a generator is connected to a position maintaining a predetermined distance so as to check the performance state of the internal engine 10. Has

In addition, the temperature scanner 70 is connected to the output terminal is a portable computer 100 that can be displayed graphically by a program set therein by inputting a communication signal to convert the temperature change of the engine or generator into an electrical signal to output It has a monitor 600 to which it is connected.

The portable computer 100 of the monitor 600 may display a temperature change of each item related to an engine cylinder exhaust, a turbocharger, a generator bearing, a generator winding, and the like of a tandem diesel generator in the temperature scanner 70. RS-485 communication unit 400 for receiving an output communication protocol signal, and a network interface unit 500 is connected to the portable computer 100 to receive a control signal from an external power plant computer network 60 is connected Has a configuration.

In addition, the portable computer 100 receives the control signal output from the diesel engine generator controller 8, removes the noise component of the received analog signal, and then amplifies and outputs the analog signal processor 300 connected to the outside. The analog signal processor 300 converts the analog signal into a digital signal so that the multifunction A / D converter 200 for executing a program of the portable computer 100 is connected.

If described in detail the effect of the present invention is configured as follows.

The present invention relates to a device capable of monitoring the performance of a tandem diesel generator for a nuclear power plant. As shown in FIG. 1 or FIG. 2, the monitor 600 controls an engine inside an emergency diesel engine controller 80. The load distribution controller combines a signal outputting the control state of the fuel rack position sensor and the generator from the proportional calculus controller to obtain a result value, and the analog signal for the result value is removed by the analog signal processor 300. After the amplification is converted into a digital signal by the multi-function A / D conversion unit 200 of the portable computer 100, the portable computer 100 is to display the operating state of the engine and the generator graphically according to the set program.

In addition, after the monitor 600 measures various temperature values of the generator and engine of the emergency diesel engine controller 80 through the temperature scanner 70, the internal RS-485 communication board and the RS-485 of the portable computer 100 are measured. The measured temperature data is provided to the portable computer 100 system through a communication protocol between the communication units 400.

The portable computer 100 mutually exchanges programs or execution commands supplied from the power plant network by the internal network interface 500.

On the other hand, the present invention is the emergency diesel engine controller 80 is connected to the engine 10 to rotate in the clockwise and counterclockwise direction on the left and right of the generator 20, as shown in FIG. If the driving forces of the two engines 10 are not balanced, the engine is unreasonable, the efficiency is lowered, and if the shaft connection or the vibration of the shaft is damaged, the state is unable to operate. This fault occurs mainly at the start-up, and in order to diagnose the condition of the present invention, the present invention selects a monitoring diagnostic variable into two categories as follows.

First, when the engine of the emergency diesel engine controller 80 is started, the generator control signal generated by the engine driving is output by the proportional calculus controller 30 and the left and right engines input through the proportional integral controller 30. The load distribution degree is output by the load distribution controller 40, and the fuel rack position status signal, generator voltage, generator frequency, generator output, and start signal detected by the fuel rack position sensor 11 mounted on the engine 10 are output. Collect 1000 signals per second.

Secondly, generator and engine temperature values for diagnosing the load balance of both sides of the tandem engine during operation after starting the engine.The temperature of each 20 cylinders per cylinder, turbocharger temperature, generator bearing temperature, and generator winding The temperature is collected through the temperature scanner 70 and the RS-485 communication unit 400.

The collected signals are displayed as real-time graphs and analysis diagrams on the screen of the portable computer 100. Collected signals are also stored in the database and used for performance diagnosis after the test is completed. Back up to other media by sending the necessary data over the intranet network.

By using this design, it is possible to diagnose and monitor the load imbalance of tandem type diesel generators for nuclear power plants, and to monitor the main performance variables related to control and operation in real time and store them in a database to use the historical data of the past to make trends of each performance variable. Analyze and predict degradation. Through this, the reliability of the emergency diesel generator, which is the bulwark of nuclear power plant's ultimate safety, will be improved, as well as the safety of the entire nuclear power plant.

In addition, the present invention diagnoses the load imbalance between the two sides of the tandem engine, which is the root cause of the breakage of the shaft connection of the emergency diesel generator, and takes the necessary measures such as controller setpoint adjustment and engine driver adjustment. Has the effect of solving the imbalance problem.

Claims (3)

The proportional calculus controller 30 and the proportional calculus controller for controlling the driving state of the engine 10 and the generator 20 to which the fuel rack position sensors 11 are connected to the left and the right of the generator 20, respectively. 30 and an emergency diesel engine controller 80 to which a load distribution controller 40 for controlling a load distribution state can be controlled from a signal sensed by the fuel rack position sensor 11, and the emergency diesel engine controller 80. A temperature scanner 70 capable of reading the temperature change of the engine or the generator at a position maintaining a constant distance so as to check the performance state of the internal engine 10, and connected to an output terminal of the temperature scanner 70 Nuclear power connected to the monitor or the like connected to the portable computer 100 to display the graphical change by the program set inside when the output of the temperature change of the engine or generator converted into an electrical signal and outputs a communication signal Performance monitoring system for tandem diesel generator for power plants. The portable computer (100) of the monitor (600) according to claim 1, wherein the portable computer (100) of the monitor (600) is configured to display the temperature change of each item related to the engine cylinder exhaust, turbocharger, generator bearing, generator winding, etc. of the tandem diesel generator. RS-485 communication unit 400 for receiving a communication protocol signal output from the temperature scanner 70, and a network interface unit connected to the portable computer 100 to receive a control signal from an external power plant computer network 60 Tandem type diesel generator performance monitoring device for the nuclear power plant (500) is connected. The portable computer 100 of the monitor 600 receives the control signal output from the diesel engine generator controller 8 to remove the noise component of the received analog signal, and then amplifies and outputs it. The analog signal processor 300 is externally connected, and the multi-function A / D converter 200 converts the analog signal of the analog signal processor 300 into a digital signal so that the program of the portable computer 100 can be executed. Tandem type diesel generator performance monitoring device for nuclear power plants.