KR102357119B1 - Control loop tunning System for starting equipment during standstill of synchronous machine and Method thereof - Google Patents

Abstract

Disclosed is a system for tunning a control loop of a starting device during a shutdown of a synchronous device, which enables pre-tunning by forcibly turning on a starting device inverter switching element during the shutdown of the synchronous device so that an actual current flows in the synchronous device. The system for tunning the control loop of the starting device during the shutdown of the synchronous device comprises: a starting device having a synchronous device starting a turbine; a detection unit measuring an input power source of the starting device; a current control block performing control loop tunning so that a two-phase current of three phases flows during the shutdown of the synchronous device using a measured current in the input power source; and a loop tunning control block providing a reference signal for the control loop tunning.

Description

Control loop tuning system for starting equipment during standstill of synchronous machine and Method thereof

The present invention relates to a starter control loop technology, and more particularly, a starter control loop tuning system that allows a current control test in which winding resistance and reactance components of a synchronizer are reflected by flowing currents in two phases while the synchronizer is stopped; it's about how

A pumped water or gas turbine generator for the power generation industry cannot start and rotate by itself due to the nature of its operation. As a starting device for the initial start of a synchronous generator, a stationary load current inverter system using a thyristor and a power semiconductor device has been commercialized and operated in many cases.

However, in the tens of MW class large-capacity speed control starting device, it is difficult to accurately know the parameters of the target synchronous machine during initial test operation, so it takes a lot of time to tune the controller. In addition, if the power plant operation is repeated for control parameter tuning, small power and a lot of fuel are consumed, which adversely affects the economy.

In particular, the control block of the power plant stop type starter has a form using the traditional cascade control method, and has a current controller in the inner loop and a speed controller outside. The phase firing angle of the inverter on the synchronous machine is only proportionally controlled to give a certain firing angle according to the speed, and all controllers are arranged on the converter side. The converter detects the voltage, sets a reference angle synchronized with the power supply voltage, and outputs a firing signal to six thyristors according to the output firing angle of the current controller.

It consists of a controller that converges to “0” the error between the synchronous speed and the speed command value from the output signal of the speed calculator. At this time, the output becomes the current setpoint related to the synchronous torque. Similarly, the current controller is composed of a controller so that the error between the output and the current value from the speed controller converges to “0”.

When the power plant stationary starting device is installed on site, as shown in FIG. 4 , the current control loop 420 short-circuits the reactor stage 410 to flow thousands [A], and only the current loop was tested and tuned. The problem with this test was that it was not connected to the synchronous base to be controlled, so it was difficult to accurately tune the synchronous machine winding resistance and reactance. In addition, it had the disadvantage of having to retune by operating a large synchronous machine several times during the speed control operation linked to the synchronizer.

In addition, due to the characteristics of speed control, the internal current controller loop, which is responsible for the most important torque control, must be precisely tuned, but there is a problem that many difficulties exist in the existing method.

In addition, the power plant stationary starter is a synchronous speed control system using a large-capacity power converter of several MW or more. There is a problem.

1. Japanese Patent Publication No. 3322581 (Registration Date: 2002.06.28)

The present invention has been proposed to solve the problem according to the above background, and it is possible to perform pre-tuning by forcibly turning on the inverter switching element of the starting device during stop of the synchronizer and allowing actual current to flow through the synchronizer. It is an object to provide a system and method.

Another object of the present invention is to provide a system and method for tuning a starter control loop during synchronous stop, which enables the speed controller to tune all parameters of the controller by indirect tuning by substituting inertia parameters.

In order to achieve the above object, the present invention provides a starter control loop tuning system during synchronous stop, which enables pre-tuning by forcibly turning on a starter inverter switching element during synchronous stop to flow an actual current to the synchronizer.

The starting device control loop tuning system during stop of the synchronizer comprises:

a starting device having a synchronizer for starting the turbine;

a sensing unit for measuring the input power of the starting device;

a current control block for performing a control loop tuning to flow a two-phase current among three phases while the synchronizer is stopped using a current measured among the input power; and

and a loop tuning control block providing a reference signal for tuning the control loop.

In this case, the loop tuning control block may include: a control loop switch performing a function of providing a reference signal for tuning the control loop; and a speed controller configured to generate a speed control output value for speed control so that the error between the driving speed of the synchronizer and the speed command value converges to “0”.

In addition, the control loop switch is characterized in that it selectively connects the reference signal for the control loop tuning or the speed control output value.

The current control block may include: a current controller configured to generate an output control current using a reference signal transmitted from the control loop switch; a phase-locked loop unit for calculating a phase of the voltage power measured by the sensing unit; and a driving voltage generator configured to generate a driving voltage for turning on/off a plurality of converter-side switching elements connected to the three phases of the starting device by matching the phase with the output control current.

In addition, the reference signal is characterized in that it is a value generated by a user input.

In addition, the starting device control loop tuning system may include an on/off control block for selectively turning on/off a plurality of inverter-side switching elements connected to the three phases of the starting device.

In addition, two inverter-side switching elements connected to the two phases among the plurality of inverter-side switching elements are conductive to form a closed loop.

In addition, the closed loop is characterized in that the control logic of a cascade method comprising an inner loop performing current control and an outer loop performing speed control.

In addition, the on-off control block may include: a selector for selecting on/off of the plurality of inverter-side switching elements; and a pulse train generator that generates a driving pulse according to the selected ON/OFF.

In addition, the pulse train generator is characterized in that it is composed of an oscillator and an AND gate.

On the other hand, another embodiment of the present invention comprises the steps of: (a) providing, by a loop tuning control block, a reference signal for control loop tuning; (b) measuring, by the sensing unit, the input power of a starting device having a synchronizer for starting the turbine; and (c) performing, by the current control block, a control loop tuning so that two-phase currents among three phases flow while the synchronizer is stopped by using the current measured from the input power source. Control loop tuning method is provided.

According to the present invention, performing the test while the synchronous generator is stopped can greatly help to stabilize the system and many control tuning errors.

In addition, as another effect of the present invention, in particular, the synchronous parameter to be controlled is

By reflecting directly on the control and testing it, it is stable and initialized through accurate control tuning in advance.

The point is that it can be maneuvered.

In addition, as another effect of the present invention, it is possible to reduce the trial run time by more than half by performing a test before starting with the starting device, so that economic effects can be obtained.

1 is a simplified diagram of a starting device according to an embodiment of the present invention;
FIG. 2 is a block diagram of a starting device control loop tuning system during synchronous stop for controlling the starting device shown in FIG. 1 .
3 is a block diagram of an on-off control block for on-off control of the inverter-side switching element shown in FIG. 2 .
4 is a conceptual diagram of a test of a general current controller.
5 and 6 are flowcharts showing a procedure of a starter control loop tuning test while a synchronizer is stopped according to an embodiment of the present invention.
7 is a conceptual diagram of a simplified control loop according to an embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing each figure, like reference numerals are used for like elements. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term “and/or” includes a combination of a plurality of related listed items or any of a plurality of related listed items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. shouldn't

Hereinafter, with reference to the accompanying drawings, a system and method for tuning a start device control loop during a synchronous stop according to an embodiment of the present invention will be described in detail.

1 is a simplified diagram of a starting device 100 according to an embodiment of the present invention. Referring to FIG. 1 , the starting device 100 may include a synchronizer 120 , an inverter 130 , a reactor 140 , a converter 150 , and the like. The starting device 100 serves to raise the turbine 10 at a constant rotational speed so that the turbine 10 can perform a normal operation when the turbine is started. That is, when the gas turbine rises above the initial starting speed, combustion occurs in the combustor and can operate by itself.

However, the starting device 100 is required in order to forcibly rotate the turbine 10 to increase it above the initial starting speed. In this way, the gas turbine generator can be started when the initial starting speed is higher than the initial starting speed by the starting device 100 .

The turbine 10 may be a steam turbine, a gas turbine, or the like. The synchronizer 120 receives power from the inverter 130 and starts to rotate the turbine 10 . The synchronous motor 120 is a synchronous motor.

The inverter 130 converts the DC power V _{d_inv} input through the smoothing reactor 140 into the AC power V _abc and supplies it to the synchronizer 120 . At this time, the inverter 130 supplies three-phase AC power to a coil connected to a stator (not shown) of the synchronizer 120 . In addition, the inverter 130 forms a magnetic field in the coil by controlling the three-phase AC power source, and the magnitude or direction of the magnetic field can be adjusted.

The smoothing reactor 140 inputs the DC power supplied through the converter 150 to the inverter 130 . At this time, the smoothing reactor 140 limits the abrupt change in the DC current supplied through the converter 150 .

In order to turn off the switching operation (inverting operation) of the switching element included in the inverter 130 during the forced current control mode operation of the starting device 100 , the smoothing reactor 140 is a DC current at the inverter switching time. should be '0A'.

The converter 150 receives the AC power (V _rst ) from the grid power source, rectifies the AC power (V _rst ) and converts it into a DC power (V _{d_cov} ).

FIG. 2 is a block diagram of the starting device control loop tuning system 200 during synchronous stop for controlling the starting device 100 shown in FIG. 1 . Referring to FIG. 2 , the starting device control loop tuning system 200 during synchronous stop includes a starting device 100 , a sensing unit 201 for detecting input power of the starting device 100 , a current control block 210 , It may be configured to include a loop tuning control block 220 , an on-off control block 240 , and the like.

The sensing unit 201 performs a function of sensing the power delivered to the input terminal of the converter 150 . The power supply is a current power supply Iabc and a voltage power supply Vabc. Accordingly, the sensing unit 201 includes a current sensor 201-1 and a voltage sensor 201-2. As the current sensor 201-1, a CT (Current Transformer) is mainly used, but is not limited thereto, and a Hall sensor, an optical fiber current sensor, or the like may also be used. As the voltage sensor 201-2, a potential transformer (PT) is mainly used, but is not limited thereto, and other types of voltage sensors may be used.

The current control block 210 performs a current control test in which the winding resistance and reactance component 208 of the synchronizer 120 are reflected by flowing a current in two phases while the synchronizer 120 is stopped. In other words, control loop tuning is performed so that two-phase current flows while the synchronizer 120 is stopped. To this end, the current control block 210 may include a phase locked loop unit 211 , a current controller 212 , a driving voltage generator 213 , and the like. In other words, the driving voltage generator 213 receives the synchronous phase angle from the phase lock loop unit 211 and receives the output current from the current controller 212 to turn on the switching element 251 included in the converter 150 . It performs a function of generating a driving voltage that turns off. The driving voltage may be a pulse width modulation (PWM) signal.

The phase locked loop unit 211 calculates the phase of the voltage power measured from the voltage sensor 201 - 2 and transmits it to the driving voltage generator 213 .

The current controller 212 generates an output control current using the reference signal I _dw transmitted from the loop tuning control block 220 . Of course, the output control current may be calculated using the PID control method. In other words, the cycle occupancy is automatically adjusted according to the set current to calculate the output value. The reference signal I _dw is input by the tester's command rather than the output of the speed controller 223 when the current controller 212 is tested.

The driving voltage generator 213 performs a function of generating a driving voltage by matching the output control current to the phase of the power input to the input terminal of the converter 150 . In other words, the six converter-side switching elements 251 configured in the converter 150 are detected by detecting the voltage power of the converter 150 to set a reference angle synchronized with the voltage power, and according to the output firing angle of the current controller 212 . A firing signal (cos ^-1 (α)) is output to The firing angle may be a constant value.

The loop tuning control block 220 is a control loop switch 224 that performs a function of providing a reference signal (I _dw ) for tuning the control loop, the driving speed of the synchronizer 120 and the speed reference signal, the speed command value N _w ) may be configured to include a speed controller 223 that performs a function to converge the error to “0”. Of course, when the loop tuning control block 220 detects the current power supply I _abc and a proportional gain value is calculated through the gain calculator 221 , it is subtracted from the speed command value N _w . For this purpose, the subtractor 222 is configured.

Meanwhile, the control loop switch 224 performs a function of selectively connecting the reference signal I _dw for tuning the control loop and the speed control output value of the speed controller 223 .

A forward diode 203 is configured between the current sensor 201-1 and the gain calculator 221 to prevent reverse current. In addition, the output of the positive diode 203 is simultaneously connected to the gain calculator 221 and the subtractor 230 . Accordingly, the subtractor 230 subtracts the current power supply I _abc from the output value of the control loop switch 224 , and inputs the subtracted value to the current controller 212 .

Meanwhile, switching elements 231 are also configured on the inverter 130 side. A pair of switch elements is disposed in each phase of these switching elements 231, and a total of six inverter-side switching elements TH1, TH2, TH3, TH4, TH5, and TH6 are configured. In other words, the first inverter-side switching element TH1 and the fourth inverter-side switching element TH4 are arranged in pairs on phase a, and the third inverter-side switching element TH3 and the sixth inverter-side switching element are arranged on phase b. (TH6) is arranged in pairs, and the fifth inverter-side switching element TH5 and the second inverter-side switching element TH2 are arranged in pairs on c.

The on-off control block 240 is configured to control the on-off of the inverter-side switching element 231 . The on/off control block 240 may include a selector 241 that selects on/off of the inverter-side switching element 231, a pulse train generator 242 that generates a driving pulse according to the selected on/off, and the like. .

Therefore, the first and second inverter-side switching elements TH1 and TH2 of the inverter 130 are made to conduct and a current flows to form a closed loop without short-circuiting the smoothing reactor 140 any longer. In other words, since the current controller 212 is a torque control part that causes the synchronizer 120 to drive, if a stabilizing tuning value is set by performing a step test connected to the synchronizer, the test time is dramatically reduced when the large synchronizer is initially driven. It has the great advantage that it can be shortened to Therefore, in order to test the synchronizer 120 while it is stopped, only two switching elements are continuously turned on at the same time during the test.

In the test mode 251,252, only the first and second inverter-side switching elements TH1 and TH2 are selected, and the pulse generator generates continuous pulses so that the inverter-side switching elements are continuously turned on to conduct. Then, a DC current flows in the stator winding of the synchronous machine 120 , and the actual resistance and reactance components 208 of the synchronous winding winding are reflected in the control part to perform tuning of the closed-loop current controller. If the PID value of the current controller is tuned while changing the reference value (I _dw ) of the current controller, accurate tuning can be performed even while the synchronizer is stopped.

In other words, FIG. 2 is a representative diagram of a speed control logic test method during synchronous stop. In order to actually reflect the winding resistance and reactor components of the synchronous machine 120, which are generally difficult to measure, during the test, current can actually flow while the synchronous machine is stopped. First, the current controller 212 is first tuned and then the speed controller 223 is tuned. When the current controller is tuned, the control loop switch 224 operates to input the reference signal I _dw from the outside.

When the test mode and the current control tuning mode 251 are turned on, the control loop switch 224 operates and the selector 241 turns on the first and second inverter-side switching elements TH1 and TH2. In addition, after the first and second inverter-side switching elements TH1 and TH2 are selected, the pulse train generator 242 is operated to generate a constant pulse firing signal, so that the inverter-side switching elements can smoothly conduct. In the synchronizer 120, since the a, b, and c phases of the stator winding have the same impedance, {TH1, TH2}, {TH2, TH3}, {TH3, TH4}, {TH4, TH5}, {TH5 of the inverter-side switching element If ,TH6} is turned on and conducts in pairs, the same tuning result can be obtained. An embodiment of the present invention has been described as conducting {TH1, TH2}. When {TH1, TH2} conducts, current flows up to the actual synchronizer winding to tune the current control loop, so that the control is unstable when the synchronizer 120 is actually driven, so that there is no overcurrent.

After the current control tuning, the speed controller 223 is tuned. When the current controller tuning mode is turned off and the speed controller tuning mode is turned on, the control loop switch 224 is connected to the speed controller 223 . At this time, the current reference signal I _dw is ignored. Also, at this time, a loop including the inertia of the synchronizer 120 is connected. The inertia coefficient is provided by the synchronizer manufacturer, and the speed controller 223 may be tuned by inputting this value. The cascade control logic that uses the inner loop for current control and the outer loop for speed control during synchronous stop can be almost perfectly tuned.

If the test using the present invention is tested after the commissioning of the power plant and the completion of measures after a failure occurs, the test period can be shortened when the synchronous machine is operated, thereby obtaining economic effects.

In FIG. 2 , a thyristor is used as the switching element 251,231, but is not limited thereto, and semiconductors such as FET (Field Effect Transistor), MOSFET (Metal Oxide Semiconductor FET), IGBT (Insulated Gate Bipolar Mode Transistor), power rectifier diode, etc. A switching element, a gate turn-off (GTO) thyristor, a triode for alternating current (TRIAC), a silicon controlled rectifier (SCR), an integrated circuit (IC) circuit, or the like may be used. In particular, in the case of a semiconductor device, a bipolar device, a power MOSFET (Metal Oxide Silicon Field Effect Transistor) device, etc. may be used. The power MOSFET device has a double-diffused metal oxide semiconductor (DMOS) structure unlike general MOSFETs due to high voltage and high current operation.

In addition, although the control loop switch 224 and the speed controller 223 are configured together in the loop tuning control block 220 in FIG. 2 , they may be configured separately.

In addition, the current controller tuning mode & test mode 251, the test mode & speed controller tuning mode 252 may be generated by user input or may be automatically generated using a microprocessor and a program.

3 is a block diagram of an on-off control block 240 for on-off control of the inverter-side switching element 231 shown in FIG. 2 . That is, FIG. 3 shows the firing portion of the inverter-side switching element 231 . Referring to FIG. 3 , the on-off control block 240 includes a selector 241 that selects on/off of the inverter-side switching element 231 and a pulse train generator 242 that generates a driving pulse according to the selected on-off. . The selector 241 may be configured as an integrated circuit (IC). When the first and second inverter-side switching elements 231 are selected by the selector 241 and turned on, the pulse train generator 242 is connected to the oscillator 310 and the AND gates 321 to 326 so that a firing signal in the form of a pulse train is generated. occurs In this way, the inverter-side switching element can more stably maintain the turned-on state.

5 and 6 are flowcharts showing a procedure of a starter control loop tuning test while a synchronizer is stopped according to an embodiment of the present invention. In particular, FIGS. 5 and 6 show a process of actually allowing a current to flow while the synchronizer is stopped during the test in order to actually reflect the winding resistance and reactor components of the synchronizer, which are generally difficult to measure.

5 and 6, the current controller 212 is first tuned and then the speed controller 223 is tuned. When the current controller is tuned, the control loop switch 224 operates to operate the reference signal ( I _dw ) is input (steps S510, S520, S530).

When the test mode and the current control tuning mode are turned on, the control loop switch 224 operates and the selector 241 turns on the first and second inverter-side switching elements TH1 and TH2. In addition, after the first and second inverter-side switching elements TH1 and TH2 are selected, the pulse train generator 242 is operated to generate a constant pulse firing signal so that the inverter-side switching element can be smoothly conducted (step S540, S550).

In the synchronizer 120, since the a, b, and c phases of the stator winding have the same impedance, {TH1, TH2}, {TH2, TH3}, {TH3, TH4}, {TH4, TH5}, {TH5 of the inverter-side switching element If ,TH6} is turned on and conducts in pairs, the same tuning result can be obtained.

Thereafter, as a result of the tuning, it is determined whether the current overshoot is smaller than a reference value (eg, 10%) (step S560). As a result of the determination, if the current overshoot is greater than the reference value, steps S510 to S550 are performed.

On the other hand, if the current overshoot is smaller than the reference value, the process proceeds to S610 of FIG. 6 . In one embodiment of the present invention, the first and second inverter-side switching elements TH1 and TH2 have been described as conducting. When the first and second inverter-side switching elements TH1 and TH2 are turned on, current flows up to the actual synchronizer winding to tune the current control loop, thereby preventing overcurrent from occurring due to instability of control during actual operation of the synchronizer.

After the current control tuning, the speed controller 223 is tuned. When the current controller tuning mode is turned off and the speed controller tuning mode is turned on, the control loop switch 224 is connected to the speed controller 223 . At this time, the current reference signal I _dw is ignored (steps S610, S620, S630).

Also, at this time, a loop including the inertia of the synchronizer 120 is connected, and the inertia coefficient is provided by the synchronizer manufacturer, and the speed controller is tuned by inputting this value.

Thereafter, the first and second inverter-side switching elements TH1 and TH2 are turned on in the selector 241 . In addition, after the first and second inverter-side switching elements TH1 and TH2 are selected, the pulse train generator 242 is operated to generate a constant-pulse firing signal so that the inverter-side switching element can smoothly conduct (step S640, S650).

In the synchronizer 120, since the a, b, and c phases of the stator winding have the same impedance, {TH1, TH2}, {TH2, TH3}, {TH3, TH4}, {TH4, TH5}, {TH5 of the inverter-side switching element If ,TH6} is turned on and conducts in pairs, the same tuning result can be obtained.

Thereafter, as a result of the tuning, it is determined whether the speed overshoot is smaller than a reference value (step S660). As a result of the determination, if the speed overshoot is greater than the reference value (eg, 10%), steps S610 to S650 are performed.

On the other hand, if the speed overshoot is less than the reference value, the control logic tuning test of the starting device is terminated.

5 and 6, it is possible to almost perfectly tune the cascade control logic in which the current control is the inner loop and the speed control is the outer loop while the synchronizer is stopped.

7 is a conceptual diagram of a simplified control loop according to an embodiment of the present invention. Referring to FIG. 7 , a general control loop 710 is changed to a simplified control loop 720 . In other words, since the friction coefficient among the inertia J and the friction coefficient B of the synchronous machine 120 in the general control loop 710 is almost nonexistent when the synchronous machine is started, it can be simplified as B=0. Here, La is the a-phase reactance, Ra is the a-phase resistance, S is the Laplace operator, and K is the proportional gain. In addition, Nw is the speed command value which is the speed reference signal, and Nx is the feedback signal after the speed operation.

In addition, the steps of the method or algorithm described in relation to the embodiments disclosed herein are implemented in the form of program instructions that can be executed through various computer means such as a microprocessor, a processor, a CPU (Central Processing Unit), etc. It can be recorded on any available medium. The computer-readable medium may include program (instructions) codes, data files, data structures, etc. alone or in combination.

The program (instructions) code recorded on the medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs, DVDs, Blu-rays, and the like, and ROM, RAM ( A semiconductor memory device specially configured to store and execute program (instruction) code such as RAM), flash memory, and the like may be included.

Here, examples of the program (instruction) code include not only machine language codes such as those generated by a compiler but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

10: turbine
100: starting device
120: synchronizer
130: inverter
140: smoothing reactor
150: converter
210: current control block
220: loop tuning control block
240: on-off control block

Claims (20)

a starting device 100 having a synchronizer 120 for starting the turbine 10;
a sensing unit 201 for measuring the input power of the starting device 100;
a current control block 210 for performing control loop tuning to flow two-phase currents among three phases while the synchronizer 120 is stopped by using the current measured among the input power; and
It includes; a loop tuning control block 220 that provides a reference signal (I _dw ) for tuning the control loop;
The loop tuning control block 220,
a control loop switch 224 that functions to provide a reference signal I _dw for tuning the control loop; and
a speed controller 223 for generating a speed control output value for speed control so that the error between the driving speed of the synchronizer 120 and the speed command value N _w converges to “0”;
an on-off control block 240 for selectively turning on/off a plurality of inverter-side switching elements 231 connected to the three phases of the starting device 100;
The on-off control block 240,
a selector 241 for selecting on/off of the plurality of inverter-side switching elements 231; and
and a pulse train generator (242) generating a drive pulse according to the selected ON/OFF.
delete The method of claim 1,
The control loop switch 224 selectively connects the reference signal (I _dw ) or the speed control output value for the control loop tuning.
The method of claim 1,
The current control block 210,
a current controller (212) for generating an output control current using a reference signal (I _dw ) transmitted from the control loop switch (224);
a phase-locked loop unit 211 for calculating a phase of the voltage power Vabc measured from the sensing unit 201; and
a driving voltage generator 213 for generating a driving voltage for turning on/off the plurality of converter-side switching elements 251 connected to the three phases of the starting device 100 by matching the phase with the output control current; Synchronizer stop, characterized in that the starting device control loop tuning system.
The method of claim 1,
The reference signal (I _dw ) is a starting device control loop tuning system during synchronous stop, characterized in that the value generated by a user input.
delete The method of claim 1,
Two inverter-side switching elements connected to the two phases among the plurality of inverter-side switching elements (231) conduct, thereby creating a closed loop.
8. The method of claim 7,
The closed loop is a starting device control loop tuning system during synchronous stop, characterized in that it is a cascade control logic with an inner loop performing current control and an outer loop performing speed control.
delete The method of claim 1,
and the pulse train generator (242) comprises an oscillator (310) and AND gates (321 to 326).
(a) loop tuning control block 220 providing a reference signal (I _dw ) for control loop tuning;
(b) the sensing unit 201 measuring the input power of the starting device 100 having the synchronizer 120 for starting the turbine 10; and
(c) performing, by the current control block 210, a control loop tuning to flow a two-phase current among three phases while the synchronizer 120 is stopped using the current measured among the input power;
The loop tuning control block 220,
a control loop switch 224 that functions to provide a reference signal I _dw for tuning the control loop; and
a speed controller 223 for generating a speed control output value for speed control so that the error between the driving speed of the synchronizer 120 and the speed command value N _w converges to “0”;
Step (c) is,
The on-off control block 240 selectively turns on/off the plurality of inverter-side switching elements 231 connected to the three phases of the starting device 100;
The on-off control block 240,
a selector 241 for selecting on/off of the plurality of inverter-side switching elements 231; and
and a pulse train generator (242) generating a driving pulse according to the selected ON/OFF control loop tuning method during synchronous stop.
delete 12. The method of claim 11,
The control loop switch 224 selectively connects the reference signal (I _dw ) or the speed control output value for the control loop tuning.
12. The method of claim 11,
The current control block 210,
a current controller (212) for generating an output control current using a reference signal (I _dw ) transmitted from the control loop switch (224);
a phase-locked loop unit 211 for calculating a phase of the voltage power Vabc measured from the sensing unit 201; and
a driving voltage generator 213 for generating a driving voltage for turning on/off the plurality of converter-side switching elements 251 connected to the three phases of the starting device 100 by matching the phase with the output control current; A method for tuning a control loop of a starting device during a synchronous stop, characterized in that.
12. The method of claim 11,
The reference signal (I _dw ) is a starting device control loop tuning method during synchronous stop, characterized in that the value generated by a user input.
delete 12. The method of claim 11,
Two inverter-side switching elements connected to the two phases among the plurality of inverter-side switching elements (231) conduct, thereby creating a closed loop.
18. The method of claim 17,
The closed loop is a control loop tuning method for starting device control during synchronous stop, characterized in that the cascade control logic includes an inner loop for performing current control and an outer loop for performing speed control.
delete 12. The method of claim 11,
and the pulse train generator (242) comprises an oscillator (310) and AND gates (321 to 326).

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