KR102276555B1 - System and method for controlling automatic generator initial load increase in synchronization - Google Patents

Abstract

The present invention detects the output of the generator through the control logic of the distributed control system (DCS) without the operator's operation when the electricity generated from the turbine generator is connected to the power system to determine the load rate and the target load. It relates to a method and system for controlling the initial load of a generator power system connection, which enables stable connection with the power system by automatically setting and controlling the initial load.
A generator power system connection initial load control system according to the present invention, a power generation unit for generating electricity using the rotational force of a steam turbine; a power generation amount detection unit detecting the generation amount of the power generation unit; a switching unit for switching the output of the power generation unit and connecting to the power system; and a power generation control unit for controlling the switching so that the output of the power generation unit is connected to the power system, and automatically setting the initial load including the load factor and the target load when the generation amount of the power generation unit is above a certain level, and then controlling the generation of the power generation unit until the target load. include

Description

Generator power system connection initial load control method and system {System and method for controlling automatic generator initial load increase in synchronization}

The present invention relates to a method and system for controlling an initial load for connection to a generator power system, and more particularly, to a control logic of a distribution control system (DCS) without an operator's operation when electricity generated from a turbine generator is connected to a power system. A method and system for controlling the initial load of a generator power system, which detects the output of the generator and automatically sets the load rate and load target to control the initial load so that it can be stably connected to the power system. it's about

In general, a power plant uses a three-phase or single-phase generator to produce electric power and supply it to a power grid through a substation and a high-voltage power line, and a power consumer receives power from the power grid and transforms it to a low voltage for use.

In the case of a thermal power plant, a turbine generator is used, and it is important to make steam at high temperature and high pressure in order to increase efficiency. A steam turbine is widely used as a device for converting high-temperature, high-pressure steam produced in a boiler into power.

In the turbine generator, the turbine is rotated by steam and the speed is raised to 3600 rpm, and then connected to the power system to produce electricity. For this, the operator must operate it quickly in the following order.

The operator selects the grid connection automatic mode, and when the grid connection conditions are satisfied, grid connection and initial load occur. When the generator's output exceeds 3 megawatts (MW), the operator selects the output control mode. Then, the operator sets the output of the generator to 45 ~ 55 MW and then selects the execution mode.

If an operator makes an erroneous operation in any one of the above processes, the turbine is abruptly stopped, the power system is not connected, and power transaction is lost due to the sudden stop of the turbine generator.

When the turbine generator is stopped unexpectedly, the boiler is extinguished and the operation is stopped. As a result, the boiler must be re-ignited so that the rotational speed of the steam turbine is increased to 3600 rpm. There is a problem in that a time delay of at least 2 hours or more occurs when connecting to the power system through this process.

Therefore, there is a need for a technology that prevents the generator from stopping unexpectedly when connecting to the power system and automatically connects the power system without operator's operation.

Korean Patent Publication No. 10-1601164 (Registration Date: March 02, 2016)

An object of the present invention for solving the above-mentioned problems is to detect the output of the generator through the control logic of the distributed control system (DCS) without the operator's operation when connecting the electricity generated from the turbine generator to the power system, and the load factor (Load) Rate) and target load (Load Target) are automatically set to control the initial load, thereby providing a method and system for controlling the initial load of a generator power system connection so that it can be stably connected to the power system.

A generator power system connection initial load control system according to an embodiment of the present invention for achieving the above object, a power generation unit for generating electricity using the rotational force of a steam turbine; a power generation amount detection unit for detecting the generation amount of the power generation unit; a switching unit for switching the output of the power generation unit and connecting to the power system; and switching control so that the output of the power generation unit is connected to the power system, and when the power generation of the power generation unit exceeds a certain level, the initial load including the load rate and the load target is automatically set, and then power is generated until the target load is reached It may include a power generation control unit for controlling the generation of negative.

Here, the power generation control unit may include a distributed control system (DCS).

In addition, the power generation unit, a water supply pump for supplying cooling water; a boiler for generating superheated steam by applying heat to the cooling water supplied from the feedwater pump; a steam turbine rotating by receiving superheated steam generated from the boiler; a condenser for condensing the exhaust steam discharged from the outlet of the steam turbine and converting it into water; It may include a generator for generating electricity by the rotational force of the steam turbine.

In addition, the switching unit, the first switching element for connecting the output of the power generation unit to the power system; a phase change transformer for adjusting the voltage level of the high voltage power output from the power generation unit to a low voltage; and an AC-DC converter converting low-voltage AC power into DC.

Also, the first switching element may be one of an SSCB, a mechanical switching element, and an electronic switching element.

In addition, the power system may include a power converter, a distributed power supply, a battery, and an EMS.

In addition, the power generation control unit, the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode), the turbine power generation state (TBN / GEN STATUS) in a reset online (Reset And Online) state, the generation amount of the power generation unit detected through the generation amount detection unit It can be determined whether this exceeds 3 megawatts (MW).

In addition, when the output of the power generation unit exceeds 3 megawatts (MW), the power generation control unit sets the turbine mode to megawatts (MW), sets the load factor to 10% (60 MW/min), and the target After setting the load to 50MW, it is possible to control the generation of the power generation unit until the target load is reached.

In addition, the power system, the main bus receiving DC power from the switching unit; a second switching element for switching the applied DC power; a DC-AC converter that converts the applied DC power into AC power; and a load unit that consumes AC power.

And, the power system includes a pole transformer, an instrument transformer, a household load outlet, a transaction load outlet, and a power converter outlet, and may be connected to the transaction load and the household load.

On the other hand, the generator power system connection initial load control method according to an embodiment of the present invention for achieving the above object is a generator power system connection initial load control method of a system including a power generation unit and a detection unit, a switching unit and a power generation control unit. , (a) the power generation control unit controlling the power generation of the power generation unit; (b) generating electricity by the power generation unit using the rotational force of the steam turbine; (c) controlling, by the power generation control unit, the connection of the switching unit so that the output of the power generation unit is connected to the power system; (d) connecting the switching unit to the power system by switching the output of the power generation unit; (e) detecting, by the detection unit, the amount of power generation of the power generation unit; (f) determining, by the power generation control unit, whether the generation amount of the power generation unit is equal to or greater than a certain level; and (g) the power generation control unit setting an initial load including a load rate and a target load when the power generation amount of the power generation unit is equal to or greater than a certain level.

In addition, (h) the power generation control unit may further include the step of controlling the power generation unit to reach a target load.

In addition, in step (f), the power generation control unit, the synchronous mode is the auto mode, the turbine power generation state (TBN / GEN STATUS) is a reset online (Reset And Online) state, the amount of power generated by the power generation unit detected through the detection unit is 3 megawatts (MW) can be determined.

In addition, in step (f), when the generation amount of the power generation unit exceeds 3 megawatts (MW), the turbine mode is set to megawatts (MW), and the load factor is 10% (60 MW/min) , and the target load can be set to 50 MW.

In addition, the power generation unit in steps (a) to (g), a water supply pump for supplying cooling water; a boiler for generating superheated steam by applying heat to the cooling water supplied from the feedwater pump; a steam turbine rotating by receiving superheated steam generated from the boiler; a condenser for condensing the exhaust steam discharged from the outlet of the steam turbine and converting it into water; And it may include a generator for generating electricity by the rotational force of the steam turbine.

In addition, the switching unit in steps (c) and (d), a first switching element for connecting the output of the power generation unit to the power system; a phase change transformer for adjusting the voltage level of the high voltage power output from the power generation unit to a low voltage; and an AC-DC converter converting low-voltage AC power into DC.

Also, the first switching element may be one of an SSCB, a mechanical switching element, and an electronic switching element.

In addition, the power system, the main bus receiving DC power from the switching unit; a second switching element for switching the applied DC power; a DC-AC converter that converts the applied DC power into AC power; and a load unit that consumes AC power.

In addition, the power system includes a pole transformer, an instrument transformer, a household load outlet, a transaction load outlet and a power converter outlet, and may be connected to the transaction load and the household load.

And, the power system may include a power converter, a distributed power supply, a battery and an EMS.

On the other hand, the generator control apparatus according to an embodiment of the present invention for achieving the above object, a switching unit for controlling a generator that produces electricity by using the rotational force of a steam turbine, and switching the output of the generator connected to the power system A generator control device for controlling and detecting the amount of generation of the power generation unit through the generation amount detection unit, comprising: a generator connection unit connected to the generator; a switching unit connection unit connected to the switching unit; a detection unit connection unit connected to the generation amount detection unit; an input unit for receiving a command or data necessary for controlling the generator; a microprocessor that switches and connects the output of the power generation unit to the power system, and sets an initial load including a load rate and a target load when the generation amount of the power generation unit is greater than or equal to a certain level; and an output unit for outputting the control status of the generator and the switching unit on the screen, or outputting the generation amount of the power generation unit and the input status through the input unit and the control processing status of the microprocessor through a screen or voice.

In addition, the microprocessor may control the power generation of the power generation unit up to a target load.

In addition, in the microprocessor, the synchronous mode is the auto mode, the turbine power generation state (TBN/GEN STATUS) is a reset online (Reset And Online) state, and the power generation amount of the power generation unit detected through the power generation detection unit is 3 megawatts (MW). Exceeding can be determined.

Then, the microprocessor sets the turbine mode to megawatts (MW), sets the load factor to 10% (60 MW/min), and sets the target load to 50 MW when the power generation amount of the power generation unit exceeds 3 megawatts (MW). can be set.

According to the present invention, when the speed of the generator in the power plant is increased to 3,600 rpm and then connected to the power system, erroneous operation is prevented as the output (MW) is automatically set without the need for direct operation by an operator with different driving skills and experience. and the convenience of generator operation is improved.

In addition, an unexpected stop can be prevented by automatically controlling the initial load when the generator is connected to the power system, thereby reducing the power transaction loss to zero and increasing the power transaction reliability.

1 is a configuration diagram schematically showing the overall configuration of a generator power system connection initial load control system according to an embodiment of the present invention.
2 is a configuration diagram schematically showing the configuration of a power generation unit according to an embodiment of the present invention.
3 is a diagram illustrating a configuration example of a switching unit according to an embodiment of the present invention.
4 is a diagram illustrating an example of a power system according to an embodiment of the present invention.
5 is a diagram illustrating another example of a power system according to an embodiment of the present invention.
6 is a diagram illustrating an operation flowchart for explaining a method for controlling an initial load connected to a generator power system according to an embodiment of the present invention.
7 is a configuration diagram schematically showing the internal configuration of the generator control device according to an embodiment of the present invention.
8 is a diagram illustrating a screen for controlling an initial load when a generator power system is connected according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques have not been specifically described in order to avoid obscuring the present invention. Like reference numerals refer to like elements throughout.

In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. Throughout the specification, like reference numerals are assigned to similar parts. When a part of a layer, film, region, plate, etc. is said to be “on” another part, it includes not only cases where it is “directly on” another part, but also cases where there is another part in between. Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. Also, when a part of a layer, film, region, plate, etc. is said to be “under” another part, it includes not only the case where the other part is “directly under” but also the case where there is another part in between. Conversely, when we say that a part is "just below" another part, it means that there is no other part in the middle.

Spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe a correlation between an element or components and other elements or components. Spatially relative terms should be understood as terms including different orientations of the device during use or operation in addition to the orientation shown in the drawings. For example, when an element shown in the figures is turned over, an element described as "beneath" or "beneath" another element may be placed "above" the other element. Accordingly, the exemplary term “below” may include both directions below and above. The device may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

In the present specification, when it is said that a part is connected to another part, it includes not only a case in which it is directly connected, but also a case in which it is electrically connected with another element interposed therebetween. In addition, when it is said that a part includes a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

In this specification, terms such as first, second, third, etc. may be used to describe various components, but these components are not limited by the terms. The above terms are used for the purpose of distinguishing one component from other components. For example, without departing from the scope of the present invention, the first component may be referred to as a second or third component, and similarly, the second or third component may also be alternately named.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly specifically defined.

Hereinafter, an initial load control system and method for connecting a generator power system according to the present invention will be described with reference to FIGS. 1 to 8 .

1 is a configuration diagram schematically showing the overall configuration of a generator power system connection initial load control system according to an embodiment of the present invention.

Referring to FIG. 1 , the generator power system connection initial load control system 100 according to an embodiment of the present invention includes a power generation unit 110 , a generation amount detection unit 120 , a switching unit 130 , and a power generation control unit 140 . may include

The power generation unit 110 generates electricity by using the rotational force of the steam turbine.

The generation amount detection unit 120 detects the generation amount of the power generation unit 110 . That is, the power generation detection unit 120 detects the amount of power generated and output by the power generation unit 110 .

The switching unit 130 switches the output of the power generation unit 110 and connects it to the power system.

The power generation control unit 140 performs switching control so that the output of the power generation unit 110 is connected to the power system, and when the generation amount of the power generation unit 110 is greater than or equal to a certain level, an initial load rate including a Load Rate and a Load Target After setting the load, the power generation of the power generation unit 110 is controlled until the target load is reached.

Here, the power generation control unit 140 may include a Distributed Control System (DCS).

In addition, the power generation control unit 140, the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode), the turbine power generation state (TBN / GEN STATUS) is a reset online (Reset And Online) state, the generation amount detection unit 120 It may be determined whether the amount of power generated by the power generation unit 110 detected through this exceeds 3 megawatts (MW).

Then, the power generation control unit 140, when the power generation amount of the power generation unit 110 exceeds 3 megawatts (MW), the turbine mode (Turbine Mode) is set to megawatts (MW), the load factor is 10% (60 MW / minutes), and after setting the target load to 50 MW, it is possible to control the power generation of the power generation unit 110 until the target load is reached.

2 is a configuration diagram schematically showing the configuration of a power generation unit according to an embodiment of the present invention.

Referring to FIG. 2 , the power generation unit 110 according to the present invention may include a feed pump 210 , a boiler 220 , a steam turbine 230 , a condenser 240 and a generator 250 . can

The feed water pump 210 supplies cooling water to the boiler 220 .

The boiler 220 generates superheated steam by applying heat to the cooling water supplied from the feed water pump 210 .

The steam turbine 230 rotates by receiving superheated steam generated from the boiler 220 .

The condenser 240 condenses the exhaust steam discharged from the outlet of the steam turbine 230 and changes it into water.

The generator 250 generates electricity by the rotational force of the steam turbine 230 .

3 is a diagram illustrating a configuration example of a switching unit according to an embodiment of the present invention.

Referring to FIG. 3 , the switching unit 130 according to the present invention includes a first switching element 310 , a phase change transformer 320 , an AC-DC converter 330 , a bus switch 340 , and a main bus 350 . ) may be included.

The switching unit 130 according to the present invention has one end connected to the generator 250 , the other two ends connected to the phase exchange transformer 320 connected to the main bus 350 , respectively, and the other terminals are connected to the main bus 350 . ) can be connected to the

The first switching element 310 is connected to the generator 250 to switch the output of the generator 250 and connect it to the power system. The first switching element may be one of a solid state circuit breaker (SSCB), a mechanical switching element (AC circuit breaker), and an electronic switching element.

The phase exchange transformer 320 adjusts the voltage level of the high voltage power output from the generator 250 to a low voltage. The phase exchange transformer 320 may have two outputs.

The phase-exchange transformer 320 converts the electrical energy for the output AC voltage of the generator 250 into magnetic energy and lowers the voltage by using the electromagnetic induction phenomenon that converts the magnetic energy back into electrical energy through the ratio of the coil. can

The AC-DC converter 330 converts low-voltage AC power into DC. The AD-DC converter 330 may be respectively connected to two outputs of the phase change transformer 320 , and may be respectively disposed between the phase change transformer 320 and the main bus 350 .

The bus switch 340 may switch and connect the two AC-DC converters 330a and 330b to the main bus 350, respectively.

The main bus 350 is a bus connected to the power system.

4 is a diagram illustrating an example of a power system according to an embodiment of the present invention.

Referring to FIG. 4 , the power system according to an embodiment of the present invention may include a power converter 400 , a distributed power source 300 , a battery 500 , and an Energy Management System (EMS) 600 . .

The power converter 400 may include a programmable logic controller (PLC) 401 , an inverter 402 , a converter 403 , and a controller 480 .

The PLC 401 may calculate an active power control value and a reactive power control value based on the voltage (V) and frequency (Hz) measured from the instrument transformer 420 installed at the inlet. For example, the PLC 401 may include a number of programs capable of calculating control logic.

The inverter 402 may control the active power and reactive power of the power converter outlet 433 based on the active power control value and the reactive power control value calculated by the PLC 401 . For example, the inverter 402 may perform a voltage conversion operation on power transmitted in both directions, and includes a DSP (Digital Signal Processor) for generating signals to control a plurality of switches included in the inverter 402 . can do.

The converter 403 may perform a voltage conversion operation on the power transferred in both directions between the power converter outlet 433 and the battery 500 and the distributed power source 300 .

In FIG. 4, the power system includes a pole transformer 410, an instrument transformer 420, a household load outlet 431, a transaction load outlet 432 and a power converter outlet 433, and a transaction load ( 441 ) and a household load 442 .

The distributed power source 300 may generate electricity while converting renewable energy, such as solar energy, wind energy, and hydraulic energy, into electrical energy.

The battery 500 may be implemented as an energy storage system (ESS), and may include a plurality of storage batteries or large storage batteries. For example, a large number of accumulators or large accumulators can maintain a State of Charge (SOC) of about 50%.

The EMS 600 generates a communication signal for remotely controlling the power conversion device 400 and transmits it to the power conversion device 400 , and may receive a signal including the power conversion result of the power conversion device 400 . have.

5 is a diagram illustrating another example of a power system according to an embodiment of the present invention.

Referring to FIG. 5 , the power system according to an embodiment of the present invention may include a main bus 350 , a second switching element 510 , a DC-AC converter 520 , and a load unit 530 .

The main bus 350 receives DC power from the switching unit 130 .

The second switching element 510 switches the applied DC power and connects it to the DC-AC converter 520 .

The DC-AC converter 520 converts the applied DC power into AC power.

The load unit 530 consumes AC power according to, for example, a rotation operation of a motor.

6 is a diagram illustrating an operation flowchart for explaining a method for controlling an initial load connected to a generator power system according to an embodiment of the present invention.

In FIG. 6 , for convenience of explanation, the generation amount detection unit 120 is denoted as a 'detector', and the power generation control unit 140 is denoted as a 'control unit'.

6 to 8 , in the generator power system connection initial load control system 100 according to the present invention, the power generation control unit 140 controls the power generation of the power generation unit 110 ( S610 ).

Accordingly, the power generation unit 110 rotates the steam turbine 230 and generates electricity using the rotational force of the steam turbine 230 ( S612 ).

That is, the power generation unit 110 supplies cooling water from the feed water pump 210 to the boiler 220, and the boiler 220 applies heat to the cooling water supplied from the feed water pump 210 to generate superheated steam, steam The turbine 230 rotates by receiving the superheated steam generated by the boiler 220 , and the generator 250 generates electricity by the rotational force of the steam turbine 230 . At this time, the condenser 240 condenses the exhaust steam discharged from the outlet of the steam turbine 230 and changes it into water.

The power generation control unit 140 switches and controls the connection of the switching unit 130 so that the output of the power generation unit 110 is connected to the power system (S620).

The switching unit 130 switches the output of the power generation unit 110 and connects it to the power system (S622).

That is, the switching unit 130 connects the output of the power generation unit 110 to the power system through the first switching element 310 , and converts the voltage level of the high voltage power output from the power generation unit 110 to the phase-exchange transformer 320 . ) to a low voltage, the low voltage AC power is converted into DC through the AC-DC converter 330 , and then transferred to the power system through the main bus 350 .

The generation amount detection unit 120 detects the generation amount of the generation unit 110 (S630).

The power generation control unit 140 determines whether the amount of power generated by the power generation unit 110 is equal to or greater than a certain level (S640).

That is, the power generation control unit 140, the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode), the turbine power generation state (TBN / GEN STATUS) is a reset online (Reset And Online) state, the generation amount detection unit 120 It can be determined whether the amount of power generated by the power generation unit detected through the above 3 megawatts (MW) is exceeded.

When the power generation amount of the power generation unit 110 is equal to or greater than a certain level, the power generation control unit 140 sets an initial load including a load rate and a load target ( S650 ).

That is, the power generation control unit 140 sets the turbine mode to megawatts (MW) when the output of the power generation unit 110 exceeds 3 megawatts (MW), and sets the load factor to 10% (60 MW/min). ), and the target load can be set to 50MW.

The power generation control unit 140 controls the power generation operation of the power generation unit 110 so that the steam turbine 230 rotates until the amount of power generation of the power generation unit 110 reaches a target load (S660).

Therefore, the power generation unit 110 generates electricity by the rotation of the steam turbine 230 and supplies it to the power system, and the power system supplies the power applied from the power generation unit 110 to a transaction load 441 or a household load ( 442).

7 is a configuration diagram schematically showing the internal configuration of the generator control device according to an embodiment of the present invention.

Referring to FIG. 7 , the generator control device 700 according to the present invention includes an input unit 710 , an output unit 720 , a microprocessor 730 , a generator connection unit 740 , a switching unit connection unit 750 , and a detection unit connection unit. (760).

The generator control device 700 according to the present invention may be implemented in the form of a computer terminal, and may also be implemented as a large-capacity processing computer such as a server computer.

The input unit 710 receives a command or data necessary for controlling the generator.

The output unit 720 may output the control status of the generator and the switching unit on the screen, or output the power generation amount of the power generation unit, the input status through the input unit, and the control processing status of the microprocessor as a screen or voice.

The microprocessor 730 performs switching control so that the output of the power generation unit is connected to the power system, and when the generation amount of the power generation unit is above a certain level, an initial load including a load rate and a target load as shown in FIG. 8 . is set automatically. 8 is a diagram illustrating a screen for controlling an initial load when a generator power system is connected according to an embodiment of the present invention.

As shown in Figure 8, the microprocessor 730 has a synchronous mode (SYNCH MODE) is an auto mode (Auto Mode), the turbine power generation state (TBN / GEN STATUS) is a reset online (Reset And Online) state, the amount of power generation It is determined whether the amount of power generated by the power generation unit 110 detected through the detection unit 120 exceeds 3 megawatts (MW).

Then, the microprocessor 730, when the power generation amount of the power generation unit 110 exceeds 3 megawatts (MW), as shown in FIG. 8, the turbine mode (Turbine Mode) is set to megawatts (MW) and , the load factor is set to 10% (60 MW/min), and the target load can be set to 50 MW.

Accordingly, the microprocessor 730 may control the power generation operation of the power generation unit 110 by using the rotational force of the steam turbine 230 until the amount of power generation of the power generation unit 110 reaches a target load. That is, the microprocessor 730 controls the rotation speed of the steam turbine 230 to generate power capable of achieving the set load factor and target load.

The generator connection unit 740 connects the generator control device 700 to the generator 250 .

The switching unit connection unit 750 connects the generator control device 700 to the switching unit 130 .

The detection unit connection unit 760 connects the generator control device 700 to the generation amount detection unit 120 .

In the generator control device 700 having the above configuration, the steam turbine 230 increases the speed to 3,600 rpm during the initial operation of the generator 250 , and the amount of power applied from the generation amount detection unit 120 through the detection unit connection unit 760 . When this 3 megawatt (MW) is exceeded, the turbine mode is automatically selected as megawatt (MW) as shown in Fig. 8, the load factor is set to 10% (60 MW/min), and the target load is set to 50 MW. Then control the rotation of the steam turbine 230 to achieve this.

In addition, in the generator control device 700, the power system when the distributed power source 300 is dropped from the power system or there is a risk of being dropped from the power system is more unstable than the power system in a normal state, so the instability of the power system through the input unit 710 The control logic for stabilization of the power system can be different according to this. That is, the microprocessor 730 receives the independent operation information of the distributed power supply linked to the power system through the input unit 710, and applies the active power control value and the reactive power control value to the stabilization of the power system according to the independent operation information. can be utilized Accordingly, the power conversion device 400 can reduce the instability of the power system according to the output fluctuation of the distributed power source.

As described above, according to the present invention, when the electricity generated from the turbine generator is connected to the power system, the output of the generator is detected through the control logic of the distributed control system (DCS) without the operator's operation to determine the load rate and target By automatically setting the load target and controlling the initial load, it is possible to realize a method and system for controlling the initial load of the generator power system, which enables stable connection with the power system.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes are possible without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

100: generator power system connection initial load control system
110: power generation unit 120: generation amount detection unit
130: switching unit 140: power generation control unit
210: feed water pump 220: boiler
230: steam turbine 240: condenser
250: generator 310: first switching element
320: phase exchange transformer 330: AC-DC converter
340: bus switch 350: main bus
300: distributed power 400: power converter
401: PLC 402: inverter
403: converter 410: pole transformer
420: instrument transformer 431: household load outlet
432: transaction load exit 433: power converter exit
441: transaction load 442: household load
500: battery 510: second switching element
520: DC-AC converter 530: load part
600: EMS 700: generator control unit
740: generator connection 750: switching connection connection
760: detection unit connection unit 710: input unit
730: microprocessor 720: output unit

Claims (18)

a power generation unit for generating electricity using the rotational force of the steam turbine;
a power generation amount detection unit detecting the generation amount of the power generation unit;
a switching unit for switching the output of the power generation unit and connecting to a power system; and
Switching is controlled so that the output of the power generation unit is connected to the power system, and when the power generation amount of the power generation unit is above a certain level, an initial load including a load rate and a load target is automatically set, and then the target load is reached a power generation control unit to control the power generation of the power generation unit;
including,
The power generation control unit, the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode), the turbine power generation state (TBN / GEN STATUS) in a reset online (Reset And Online) state, the power generation unit detected through the power generation amount detection unit It is determined whether the generation amount exceeds 3 megawatts (MW), and when the generation amount of the power generation unit exceeds 3 megawatts (MW), the turbine mode is set to megawatts (MW), and the load factor is set to 10% ( 60 MW/min), and after setting the target load to 50 MW, the generator power system connection initial load control system for controlling the generation of the power generation unit until the target load is reached.
The method of claim 1,
The power generation control unit, a distributed control system (DCS: Distributed Control System) including a generator power system connection initial load control system.
The method of claim 1,
The power generation unit,
a feed pump for supplying cooling water;
a boiler for generating superheated steam by applying heat to the cooling water supplied from the feed water pump;
The steam turbine rotates by receiving the superheated steam generated by the boiler;
a condenser for condensing the exhaust steam discharged from the outlet of the steam turbine and converting it into water;
a generator generating electricity by the rotational force of the steam turbine;
A generator power system connection initial load control system comprising a.
The method of claim 1,
The switching unit,
a first switching element connecting the output of the power generation unit to the power system;
a phase change transformer for adjusting the voltage level of the high voltage power output from the power generation unit to a voltage lower than the voltage of the high voltage power; and
an AC-DC converter converting AC power of the voltage adjusted by the phase-exchange transformer into DC;
A generator power system connection initial load control system comprising a.
5. The method of claim 4,
The first switching element, SSCB (solid state circuit breaker), mechanical switching element (AC Circuit Breaker), the generator power system connection initial load control system which is one of the electronic switching element.
The method of claim 1,
The power system, a power converter, a distributed power source, a battery, and an initial load control system connected to the generator power system including an EMS (Energy Management System).
delete delete The method of claim 1,
The power system is
a main bus receiving DC power from the switching unit;
a second switching element for switching the applied DC power;
a DC-AC converter converting the applied DC power into AC power; and
a load unit consuming the AC power;
A generator power system connection initial load control system comprising a.
The method of claim 1,
The power system includes a pole transformer, an instrument transformer, a household load outlet, a transaction load outlet and a power converter outlet, and is connected to the transaction load and the household load, the generator power system connection initial load control system.
A generator power system connection initial load control method of a system including a power generation unit and a detection unit, a switching unit and a power generation control unit,
(a) the power generation control unit controlling the power generation of the power generation unit;
(b) generating electricity by the power generation unit using the rotational force of the steam turbine;
(c) controlling, by the power generation control unit, the connection of the switching unit so that the output of the power generation unit is connected to the power system;
(d) connecting the switching unit to the power system by switching the output of the power generation unit;
(e) detecting, by the detection unit, the amount of power generation of the power generation unit;
(f) determining, by the power generation control unit, whether the generation amount of the power generation unit is equal to or greater than a certain level; and
(g) setting, by the power generation control unit, an initial load including a load rate and a target load when the power generation amount of the power generation unit is greater than or equal to a certain level;
including,
In the step (f), the power generation control unit, the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode), the turbine power generation state (TBN / GEN STATUS) in a reset online (Reset And Online) state, through the detection unit It is determined whether the power generation amount of the power generation unit to be detected exceeds 3 megawatts (MW), and when the generation amount of the power generation unit exceeds 3 megawatts (MW), the turbine mode is set to megawatts (MW), A method of controlling the initial load of a generator power system connection by setting the load factor to 10% (60 MW/min) and setting the target load to 50 MW.
12. The method of claim 11,
(h) controlling, by the power generation control unit, power generation of the power generation unit to reach a target load;
Further comprising, generator power system connection initial load control method.
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