KR20040053812A - Distributed parallel operation control system of ship generator - Google Patents

Abstract

PURPOSE: A distribution type parallel operation control unit of a ship generator is provided to control distributively a plurality of generators and prevent a trouble of a total system due to an error of a controller by using each controller corresponding to each generator. CONSTITUTION: A distribution type parallel operation control unit of a ship generator includes a plurality of distributive controllers and a display. The distributive controllers(200,300,400) are connected to a main bus in order to detect a frequency phase of the main bus. The distributive controllers are connected to plural generators in order to measure voltages, currents, and frequencies of the generators. In addition, the distributive controllers supply the electric energy of the generators to the load through the main bus by turning on an air circuit breaker when the phase of the main bus corresponds to the frequency phase of the generators. The display is connected to the distributive controller in order to display operating states and alarming states of the generators and perform particular functions.

Description

Distributed parallel operation control system of ship generator

The present invention relates to a distributed parallel operation control device for a marine generator, and in particular, implements a control device for controlling parallel operation of a marine generator independently for each generator and provides ease of product installation by allowing distributed control (DCS). The present invention relates to a distributed parallel operation control apparatus for a marine generator which provides an easy implementation of a system by removing an additional device added during system implementation and prevents one controller failure from propagating to the entire system.

In general, a generator is supplied with mechanical energy generated by mechanical movement of an engine represented by a prime mover, and converted into electrical energy by magnetic coupling of a stator and a rotor inside the generator. It is a device that supplies electric energy to a load. These generators are AVR (Automatic Voltage) that can supply and control power to the main stator and the exciter to excite the rotor and main. Regulator: It consists of control stage including automatic voltage regulator.

The system used to control such a generator is a power control and management system (PCMS), which is an efficient management and power management of power in automated ships, intelligent buildings, or industrial sites requiring emergency power. It is being used to ensure the stability and improve the maintainability of the power generation system.

The power management system has been greatly improved in performance and reliability while developing from an independent control method to a direct (interlocked) control method due to the rapid development of computers and information fields. The performance of the ship control system (SCMS), which is mounted mainly on ships, has been improved, and the control technology of the power management system has been developed so that ship automation systems can be equipped with SCMS even in small and medium-sized ships. It is a trend.

As a kind of such a power management system, a parallel operation system for controlling a plurality of generators provided in a ship in parallel operation has emerged. The parallel operation control system includes a MIMIC panel that allows the user to know various operation information and operation status of the device in the generator parallel operation control device.

1 is a block diagram showing the configuration of a centralized generator parallel operation control apparatus applied to a conventional vessel.

Here, reference numeral 10 denotes a display device for displaying the overall operation status and operation status of the centralized generator parallel operation control device, reference numeral 20 controls the start and stop of the generator, check the status of the generator and the overall operation of the device The reference numeral 30 denotes a governor controller for controlling the output of a specific generator according to the control of the controller 20, and the reference numeral 40 is connected to the governor controller 30. And an input / output selector for transmitting the output control signal of the generator output from the governor controller 30 to the corresponding generator, and reference numerals 51 to 53 denote the output control when applied to the output control signal by the input / output selector 40. Represents a plurality of generators that generate electric energy by operating in response to a signal. It represents an air circuit breaker (ACB), which is a large-capacity switch that supplies electric energy generated by the generators 51 to 53 to the load, and reference numeral 70 denotes a synchronous between one generator and the other generator. Indicates a synchronization unit.

Here, the synchronous unit 70 plays an important role of matching the voltage, phase, and frequency of the generator A with the voltage, phase, and frequency of the generator A when operating the generator, B, while the generator, A, is operating.

Looking at the operation of the centralized generator parallel operation control device applied to the conventional vessel configured as described above are as follows.

First, when power is supplied to the device, the controller 20 performs an initialization operation. Here, the control unit 20, the main processor module for controlling the overall operation of the device is implemented in redundancy, the communication module for performing communication with other devices, and also outputs a control signal or a detection signal (status signal Input / output module for receiving) is provided.

In the case of operating a specific generator (for example, generator # 1), it receives the status signal of the generator and transmits it to the display device 10 so that the corresponding state is displayed and controlled, and the state of the generator is operable. When the governor controller 30 is controlled to output the speed.

By this control, the governor controller 30 generates a signal for speed control, and the generated speed control signal is selected by the input / output selector 40 and the generator 51 is selected as the generator 51. The control signal is transmitted. The generator 51 then operates at that speed to generate electrical energy.

When the generator 51 operates by the above operation to generate electric energy of a predetermined capacity, the synchronous unit 70 generates the voltage, frequency phase flowing through the main bus 80 and generated by the generator 51. By comparing the voltage and frequency phase, the air circuit breaker 61 is turned on at the point of synchronization, so that the electrical energy output from the generator 51 is supplied to the load.

As is well known, when a specific generator 51 is started, when other generators (for example, generator # 2) are operated in a merged manner, the controller 52 checks the state of the generator 52 to operate normally. If possible, a control signal is given to the governor controller 30 to control the generator 52 to operate at a specific speed.

By this control, the governor controller 30 generates a signal for speed control, and the generated speed control signal is selected by the input / output selector 40 and the generator 52 is selected as the generator 52. The control signal is transmitted. The generator 52 then operates at that speed to generate electrical energy.

When the generator 52 operates by the above operation to generate electric energy of a predetermined capacity, the synchronization unit 70 detects the voltage, phase, and frequency of the electric energy generated by the generator 52. In addition, the air circuit breaker 62 is turned on at a point of time that matches the voltage, phase, and frequency of the generator 51 that is previously driven, so that the electrical energy output from the generator 52 is supplied to the load.

In the following, the starting method of the other generator 53 is also controlled in the same manner as the starting method of the generators 51 and 53 described above, and thus its detailed description is omitted.

The centralized generator parallel operation control device applied to such a conventional vessel has the advantage that the product consists of a single form, which simplifies the product. As a single product, the product can be quickly manufactured and the state of several controllers can be achieved. The advantage is that one display panel can be monitored.

On the other hand, many additional devices (e.g., synchronization units) are required for installation, and all control inputs and outputs are concentrated in one place, and thus additional devices such as a selector for separation of input and output signals are required in actual installation. When a plurality of signals for controlling the signal pass through a controller (for example, a governor controller), there is a problem in that a special hardware logic must be separately provided to properly combine the control signal line and the target signal line.

In addition, there is a difficulty in maintenance because it is a complex product, and since a single centralized controller controls the operation of a plurality of generators, there is a big problem that all the generator operations are stopped when one controller breaks down, and solves these problems a little. In order to implement the controller in redundancy, there is a problem that the implementation is complicated and the product design cost is high.

In addition, there is a problem in that the operation of the entire generator should be abandoned even when the selector or the governor controller additionally installed.

Therefore, the present invention has been proposed to solve the general problems generated in the centralized generator parallel operation control apparatus applied to the conventional vessel as described above,

An object of the present invention is to implement a control device for controlling parallel operation of a marine generator for each generator independently and then distributed control (DCS) to provide ease of product installation, and additional additional device added during system implementation The present invention provides a distributed parallel operation control apparatus for a marine generator that can be easily removed to provide system implementation and to prevent one controller failure from propagating to the entire system.

"Distributed parallel operation control device of the generator for ships" according to the present invention for achieving the above object,

A plurality of generators generating electrical energy and interposed between the plurality of generators and the main bus, the plurality of generators outputting the electrical energy generated by the plurality of generators to the main bus. In the parallel operation control apparatus of the marine generator with an air circuit breaker (ACB),

Directly connected to the main bus detects the frequency phase flowing in the main bus, and measure the voltage, current, frequency of the electrical energy output from the generator connected to the plurality of generators in a one-to-one correspondence, and the phase of the main bus When the frequency phase output from the connected generator coincides, the air circuit breaker is turned on to control the electrical energy generated from the generator to be supplied to the load through the main bus, and to communicate with a distributed controller connected to another generator. A distributed controller for determining and controlling main and sub operations by itself;

The display device is connected to the distributed controller to display an operation state and an alarm state of a specific generator, and includes a display device having a plurality of function keys for inputting a specific function.

In the above, the distributed controller,

An output power analyzer for measuring the three-phase voltage, current, and frequency of the electrical energy being output;

A phase detector for detecting a frequency phase of the electric energy output from the generator connected to the phase of the frequency flowing through the main bus;

An input / output bus connected with the output power analyzer and a phase detector;

It is connected to the input / output bus and receives and analyzes the outputs of the output power analyzer and the phase detector, and controls the on / off control of the air circuit breaker and the output of the generator, and the operation state data and various measurements of the generator connected to the display device. A main processor which transmits data and alarm state data to control the display of the state, and which determines a main and sub operation by itself through data communication with a distributed controller coupled to another generator;

An output module connected to the input / output bus and transmitting data output from the main processor to a connected peripheral device;

A governor controller connected to the output module to adjust an output of the connected generator according to the output control signal of the generator output from the main processor;

An input module connected to the input / output bus and receiving data transmitted from a peripheral device connected to the distributed controller and transferring the data to the main processor through the input / output bus;

A memory unit connected to the main processor and including a program for operating a device and a plurality of memories storing data generated during device operation;

A serial communicator connected to the main processor and configured to communicate with the display apparatus;

A system network communicator connected to the main processor and configured to perform data communication with the other distributed controller;

A high speed relay controller controlling the relay according to a high speed relay control signal generated by the main processor;

It is composed of a power supply for supplying the power required for the main processor and memory.

1 is a block diagram showing the configuration of a conventional centralized generator parallel operation control device,

2 is a configuration diagram of a distributed parallel operation control apparatus for a marine generator according to the present invention,

3 is a configuration diagram of an embodiment of the display apparatus of FIG. 2;

4 is an exemplary view showing the operation state of the display device in the present invention;

FIG. 5 is a block diagram illustrating an exemplary embodiment of the controller of FIG. 2.

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

200, 300, 400 ..... Distributed Controller

201 ..... Power Analyzer

202 ..... Phase detector

204 ..... Main Processor

207 ..... Memory section

208 ..... Serial Communicator

209 ..... System Network Communicator

210 ..... High Speed Relay Controller

211 ..... Power Supply

212 ..... governor controller

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention according to the technical spirit as described above.

Figure 2 is a block diagram of a distributed parallel operation control apparatus for a marine generator according to the present invention.

Here, reference numerals 51 to 53 represent a plurality of generators for generating electrical energy, and reference numerals 61 to 63 are interposed between the plurality of generators 51 to 53 and a main bus 80. The air circuit breaker (ACB) provided to correspond to the two generators 51 to 53 is shown.

Also, reference numerals 200, 300, and 400 are directly connected to the main bus 80 to detect a frequency phase flowing through the main bus 80, and are provided in a one-to-one correspondence with the plurality of generators 51 to 53. Measure the voltage, current, and frequency of the electrical energy output from the phase, and turn on the air circuit breaker (61 ~ 63) at the time when the phase of the main bus 80 and the frequency phase output from the connected generator is Distributed to control the electric energy generated from the generators 51 to 53 to supply to the load through the main bus 80, and to determine and control the main and sub-operations by communicating with a distributed controller connected to another generator. The controllers 250, 350, and 450 are connected to the distributed controllers 200, 300, and 400 to correspond to the controllers, and the operation state and alarm of a specific generator (one generator). And it displays a state, shows a display device having a plurality of function keys for inputting a certain function.

In the above, the distributed controller 200, as shown in Figure 5, the output power analyzer 201 for measuring the three-phase voltage, current and frequency of the electrical energy being output; A phase detector (202) for detecting a frequency phase of electric energy output from the generator (111) connected to the phase of the frequency flowing through the main bus (80); An input / output bus (203) connected to the output power analyzer (201) and the phase detector (202); Connected to the input / output bus 203 to receive and analyze the outputs of the output power analyzer 201 and the phase detector 202, and then control the on / off control of the air circuit breaker and the output of the generator. It transmits the operation status data of the connected generator, various measurement data, and alarm status data to control the display of the status, and operates the device by deciding the main and sub operation by the data communication with the distributed controller coupled to other generators. A main processor 204; An output module 205 connected to the input / output bus 203 to transmit data output from the main processor 204 to a connected peripheral device; A governor controller 212 connected to the output module 205 to adjust an output of the generator 51 connected according to an output control signal of the generator output from the main processor 204; An input module 206 connected to the input / output bus 203 and receiving data transmitted from a peripheral device connected to the distributed controller and transferring the data to the main processor 204 through the input / output bus 203; A memory unit 207 connected to the main processor 204 and including a plurality of memories 207a to 207d for storing a program for operating the device and data generated during the device operation; A serial communicator (208) connected to the main processor (204) for communicating with the display apparatus (250); A system network communicator (209) connected to the main processor (204) for performing data communication with the other distributed controller; A high speed relay controller 210 for controlling the relay according to the high speed relay control signal generated by the main processor 204; The main processor 204 and a power supply 211 for supplying power required for the memory.

Meanwhile, since the internal configuration and operation of the distributed controller 300 and 400 of FIG. 2 are also the same as the configuration and operation of the distributed controller 200, only the configuration and operation of the distributed controller 200 will be described below. It explains in detail.

When described in detail with reference to Figures 2 to 5 attached to the operation of the distributed parallel operation control apparatus for a marine generator according to the present invention configured as described above are as follows.

When the power is supplied by the power supply 211 in the distributed controller 200, the main processor 204 performs an initialization operation, and when the initialization is completed, the operation state of the function key included in the display device 250 is changed. Correspondingly, the overall operation of the parallel operation control device is controlled.

First, when the main processor 204 needs to start the generator 51, the main processor 204 receives the state of the generator 51 through the output module 205 and analyzes it. As a result of the analysis, when the generator 51 is normally operated, the generator driving control signal is transmitted to the governor controller 212 through the output module 205.

Accordingly, the governor controller 212 operates the generator 51.

When the generator 51 operates, the output power analyzer 201 measures three-phase voltage, current, and frequency output from the generator 51, calculates active power, etc., and delivers the digital power to the main processor 204 as digital data. do.

The main processor 204 then stores it in a specific memory 207c in the memory unit 207 and stores it in the memory 207d when necessary for long term storage.

Next, the frequency phase of the voltage currently supplied to the main bus 80 is detected. That is, the phase detector 202 detects the frequency phase of the voltage supplied to the main bus 80, and also detects and transmits the frequency phase of the voltage output from the generator 51 to the main processor 204.

Then, the main processor 204 compares the two phases to extract the phase difference, and controls the governor controller 212 according to the extracted phase difference to supply the phase of the output frequency to the main bus 80. Control to be equal to the frequency phase of the voltage.

By doing so, in the existing centralized generator parallel operation control device, the disadvantage of having to provide a separate synchronization unit (synchronous relay) is eliminated.

When the phases of the two frequencies are matched by the control as described above, the air circuit breaker 61 is turned on through the output module 205 to supply the electric energy output from the generator 51 to the load through the main bus 80. Be sure to

The output of the generator 51 is controlled to the desired level through the output of the output power analyzer 201 and the control of the governor controller 212.

On the other hand, the main processor 204 stores the state measurement data of the peripheral device input through the input module 206 in the memory unit 207, and simultaneously transmits it to the display device 250 through the serial communication unit 208 Display it.

3 illustrates an example of a display apparatus 250 according to the present invention.

As shown therein, a function input unit 251 including a plurality of function keys (automatic operation key, manual operation key, start key, stop key, output increase key, output decrease key, mode key), voltage, frequency, Four-digit FND (or four-digit 7-segment LED) 252, 253 for displaying current and power status in graph or data form, and an operation state display unit for displaying the operating state of the generator using a plurality of LEDs ( 254, an alarm state display unit 255 for displaying an alarm state, an operation state (operation state, an inoperation state) of a connected generator, and an operation and communication state for displaying whether data is transmitted or received with another distributed controller. The display part 256 is provided.

4 is a block diagram illustrating an embodiment of the display apparatus 250.

The configuration of the four-digit FND 252 and 253, the operation state display unit 254, the alarm state display unit 255, and the function input unit 251 are the same as those of FIG.

In FIG. 4, the serial communicator 257 is a communication interface for performing data communication with the distributed controller 200. The microprocessor 258 is a controller for controlling the overall operation of the display apparatus 250. 259 serves to supply power required by the display apparatus 250.

Meanwhile, the main processor 204 performs data communication with the neighbor distributed controller 300 through the system network communicator 209, and transmits its state to the neighbor distributed controller 300 and at the same time, the neighbor distributed controller. It receives the status of 300 to automatically determine whether to operate as the main or sub. In addition, the load is shared through the data communication with the neighbor distributed controller 300. For example, by effectively distributing the amount of power to be generated, it is possible to control the optimum power generation without burden.

According to the present invention described above, by providing a distributed controller, it facilitates the installation of the product, there is an advantage that the installation time is shortened because all the input and output signals are separated according to the control target, the distributed controller itself Since the frequency phase of the main bus and the frequency phase of the generator can be matched, there is no need for a separate additional device.

In addition, since it is a decentralized controller, there is an advantage that it is easy to operate required for operation, and only the state of the controller (one decentralized controller) can be displayed, thereby improving recognition. Since only the type controller needs to be stopped, in case of the centralized type, it is possible to solve all the problems that the power of the entire ship is cut off when the controller fails.

In addition, since an independent governor controller is built in the distributed controller, it is possible to prevent all control from being abandoned due to a governor failure such as a centralized structure.

Claims (2)

A plurality of generators generating electrical energy and interposed between the plurality of generators and the main bus, the plurality of generators outputting the electrical energy generated by the plurality of generators to the main bus. In the parallel operation control apparatus of the marine generator with an air circuit breaker (ACB), Directly connected to the main bus detects the frequency phase flowing in the main bus, and measure the voltage, current, frequency of the electrical energy output from the generator connected to the plurality of generators in a one-to-one correspondence, and the phase of the main bus When the frequency phase output from the connected generator coincides, the air circuit breaker is turned on to control the electrical energy generated from the generator to be supplied to the load through the main bus, and to communicate with a distributed controller connected to another generator. A distributed controller for determining and controlling main and sub operations by itself; Distributed parallel operation control of a marine generator characterized in that it comprises a display device having a plurality of function keys for inputting a specific function connected to the distributed controller to display the operation state and the alarm state of a specific generator Device. The method of claim 1, wherein the distributed controller, An output power analyzer for measuring the three-phase voltage, current, and frequency of the electrical energy being output; A phase detector for detecting a frequency phase of the electric energy output from the generator connected to the phase of the frequency flowing through the main bus; An input / output bus connected with the output power analyzer and a phase detector; It is connected to the input / output bus and receives and analyzes the outputs of the output power analyzer and the phase detector, and controls the on / off control of the air circuit breaker and the output of the generator, and the operation state data and various measurements of the generator connected to the display device. A main processor which transmits data and alarm state data to control the display of the state, and which determines a main and sub operation by itself through data communication with a distributed controller coupled to another generator; An output module connected to the input / output bus and transmitting data output from the main processor to a connected peripheral device; A governor controller connected to the output module to adjust an output of the connected generator according to the output control signal of the generator output from the main processor; An input module connected to the input / output bus and receiving data transmitted from a peripheral device connected to the distributed controller and transferring the data to the main processor through the input / output bus; A memory unit connected to the main processor and including a program for operating a device and a plurality of memories storing data generated during device operation; A serial communicator connected to the main processor and configured to communicate with the display apparatus; A system network communicator connected to the main processor and configured to perform data communication with the other distributed controller; A high speed relay controller controlling a relay according to a high speed relay control signal generated by the main processor; Distributed parallel operation control device for a marine generator, characterized in that consisting of a power supply for supplying power to the main processor and the memory.