KR20210030008A - System and method for controlling automatic generator initial load increase in synchronization - Google Patents

Abstract

The present invention relates to a generator power system connection initial load control method and to a system thereof. The generator power system connection initial load control method detects the output of the generator through the control logic of a distributed control system (DCS) without operator intervention and automatically sets a load rate and a load target to control the initial load, so as to stably connect with a power system. According to the present invention, the generator power system connection initial load control method includes: a power generation unit for generating electricity by 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 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.

Description

System and method for controlling automatic generator initial load increase in synchronization}

The present invention relates to a generator power system connection initial load control method and system, and more specifically, the control logic of a distribution control system (DCS) without an operator's operation when connecting electricity generated from a turbine generator to the power system. The generator power system connection initial load control method and system, which detects the output of the generator and controls the initial load by automatically setting the load rate and the target load through the system, so that it can be stably connected to the power system. About.

In general, a power plant generates power using a three-phase or single-phase generator and supplies 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 into a low voltage for use.

In the case of a thermal power plant, a turbine generator is used, and it is important to make the steam at high temperature and high pressure to increase efficiency. Steam turbines are widely used as devices that convert high-temperature and high-pressure steam produced by boilers into power.

The turbine generator must be connected to the power system to generate electricity after the turbine is rotated by steam and accelerated to 3600 rpm. To do this, the operator must quickly operate in the following order.

The operator selects the grid connection automatic mode, and when the grid connection conditions are satisfied, the grid connection and initial load are generated. When the generator output exceeds 3 megawatts (MW), the operator selects the power control mode. And, the operator selects the execution mode after setting the generator output to 45 ~ 55 MW.

If an operator misoperates any of the above-described steps, the turbine is suddenly stopped, the power system is not connected, and power transactions are lost due to the sudden stop of the turbine generator.

If the turbine generator stops unexpectedly, the boiler must also be extinguished and the boiler must be re-ignited as the operation stops so that the rotational speed of the steam turbine is re-raised to 3600 rpm. There is a problem that a time delay of at least 2 hours or more occurs when the power system is connected through this process.

Accordingly, there is a need for a technology that prevents the generator from stopping unexpectedly when the power system is connected, and enables the power system to be connected automatically without an operator's operation.

Korean Registered Patent Publication No. 10-1601164 (Registration Date: March 2, 2016)

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

An initial load control system for connecting a generator power system according to an embodiment of the present invention for achieving the above object comprises: a power generation unit for generating electricity using a rotational force of a steam turbine; A power generation amount detection unit that detects the power generation amount of the power generation unit; A switching unit for switching the output of the power generation unit and connecting it 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 amount of the power generation unit is over a certain level, the initial load including the load rate and the target load is automatically set and then generated until the target load is reached. It may include a power generation control unit for controlling the power generation of wealth.

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

In addition, the power generation unit, the water supply pump for supplying the cooling water; A boiler that generates superheated steam by applying heat to the cooling water supplied from the feed water 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 that generates electricity by the rotational force of the steam turbine.

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

In addition, 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 conversion device, a distributed power source, a battery, and an EMS.

In addition, the power generation control unit, when the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode) and the turbine power generation state (TBN/GEN STATUS) is reset and online, the amount of generation 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 power generation unit output exceeds 3 megawatts (MW), the power generation control unit sets the turbine mode to megawatts (MW), and sets the load rate to 10% (60MW/min), and the target After setting the load to 50MW, it is possible to control the power generation of the power generation unit up to the target load.

In addition, the power system, the main bus to receive 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 that consumes AC power.

In addition, the power system includes a pole transformer, an instrument transformer, a household load outlet, a trade load outlet, and a power converter outlet, and may be connected to a trade load and a 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, a detection unit, a switching unit and a power generation control unit. , (a) controlling, by the power generation control unit, power generation of the power generation unit; (b) generating electricity by the power generation unit using the rotational force of the steam turbine; (c) switching, by the power generation control unit, the connection of the switching unit so that the output of the power generation unit is connected to a 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, a power generation amount of the power generation unit; (f) determining, by the power generation control unit, whether the power generation amount of the power generation unit is more than a certain amount; 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 more than a certain amount.

Further, (h) the power generation control unit may further include controlling the power generation of the power generation unit to a target load.

In addition, in step (f), the power generation control unit, when the synchronous mode is the auto mode, and the turbine power generation state (TBN/GEN STATUS) is in the Reset And Online state, the power generation amount of the power generation unit detected through the detection unit is 3 megawatts. It can be judged whether it exceeds (MW).

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

In addition, the power generation unit in steps (a) to (g), a water supply pump for supplying cooling water; A boiler that generates superheated steam by applying heat to the cooling water supplied from the feed water 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 that generates electricity by the rotational force of the steam turbine.

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

In addition, 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 to receive 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 that consumes AC power.

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

In addition, the power system may include a power conversion device, a distributed power source, a battery, and an EMS.

On the other hand, the generator control device according to an embodiment of the present invention for achieving the above object controls a generator that generates electricity by using the rotational force of a steam turbine, and switches the output of the generator to connect the switching unit to the power system. A generator control device that controls and detects a power generation amount of the power generation unit through a power generation amount detection unit, comprising: a generator connection part connected to the generator; A switching unit connection unit connected to the switching unit; A detector connecting portion connected to the power generation detecting portion; An input unit for receiving a command or data necessary for controlling the generator; A microprocessor for switching and connecting an output of the power generation unit to the power system, and setting an initial load including a load rate and a target load when the power generation amount of the power generation unit is more than a certain amount; And an output unit that outputs the control status of the generator and the switching unit on the screen, or outputs 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 audio.

Further, the microprocessor can control the power generation of the power generation unit up to the target load.

In addition, in the microprocessor, when the synchronous mode is the auto mode and the turbine power generation state (TBN/GEN STATUS) is reset and online, the power generation amount of the power generation unit detected by the power generation detection unit is 3 megawatts (MW). It can be judged whether it exceeds.

In addition, the microprocessor sets the turbine mode to megawatts (MW), sets the load rate to 10% (60MW/min), and sets the target load to 50MW when the power generation 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, the output (MW) is automatically set without the need for direct manipulation by operators with different driving skills and experiences, thereby preventing misoperation. And the convenience of driving the generator is improved.

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

1 is a block 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 block diagram schematically showing the configuration of a power generation unit according to an embodiment of the present invention.
3 is a diagram showing a configuration example of a switching unit according to an embodiment of the present invention.
4 is a diagram showing an example of a power system according to an embodiment of the present invention.
5 is a view showing another example of a power system according to an embodiment of the present invention.
6 is a diagram illustrating an operation flow diagram for explaining a method of controlling an initial load of a generator power system connection according to an embodiment of the present invention.
7 is a block diagram schematically showing the internal configuration of the generator control apparatus 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 a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention belongs. It is provided to completely inform the scope of the invention to the possessor, and the 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 described in detail in order to avoid obscuring interpretation of the present invention. The same reference numerals refer to the same elements throughout the specification.

In the drawings, the thicknesses are enlarged to clearly express various layers and regions. Like reference numerals are attached to similar parts throughout the specification. When a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where the other part is "directly above", but also the case where there is another part in the middle. Conversely, when one part is "directly above" another part, it means that there is no other part in the middle. In addition, when a part such as a layer, film, region, plate, etc. is said to be "below" another part, this includes not only the case where the other part is "directly below", but also the case where there is another part in the middle. Conversely, when one part is "right below" another part, it means that there is no other part in the middle.

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

In the present specification, when a part is said to be connected to another part, this 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 a part includes a certain component, this means that other components may be further included rather than excluding other components unless otherwise specified.

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

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used with meanings that can be 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 interpreted ideally or excessively unless explicitly defined specifically.

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 block 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 power generation amount detection unit 120, a switching unit 130, and a power generation control unit 140. Can include.

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

The power generation amount detection unit 120 detects the amount of power generation of the power generation unit 110. That is, the power generation amount 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 controls switching so that the output of the power generation unit 110 is connected to the power system, and when the power generation amount of the power generation unit 110 is more than a certain amount, the initial stage includes a load rate and a target load. After setting the load, 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, in the synchronous mode (SYNCH MODE) is an Auto mode (Auto Mode), and the turbine power generation state (TBN/GEN STATUS) is reset and 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 the power generation unit 110 exceeds 3 megawatts (MW).

And, 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), and the load rate is 10% (60MW/ Minutes), and after setting the target load to 50MW, the power generation of the power generation unit 110 can be controlled until the target load is reached.

2 is a block 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 includes a feed pump 210, a boiler 220, a steam turbine 230, a condenser 240, and a generator 250. I can.

The feed water pump 210 supplies cooling water to the boiler 22.

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

The steam turbine 230 receives superheated steam generated from the boiler 220 and rotates.

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

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

3 is a diagram showing 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. ) Can 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-change transformer 320 connected to the main bus 350, respectively, and the remaining terminals are connected to the main bus 350. ) Can be connected to the side.

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

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

The phase substitution transformer 320 has a function of lowering the voltage by using an electromagnetic induction phenomenon that converts electrical energy to the output AC voltage of the generator 250 into magnetic energy and converts magnetic energy into electrical energy again through the ratio of the coil. I can.

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

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 showing an example of a power system according to an embodiment of the present invention.

Referring to FIG. 4, a power system according to an embodiment of the present invention may include a power conversion device 400, a distributed power supply 300, a battery 500, and an energy management system (EMS) 600. .

The power conversion device 400 may include a programmable logic controller (PLC) 401, an inverter 402, a converter 403, and a control unit 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 the 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 digital signal processor (DSP) that generates signals for controlling a plurality of switches included in the inverter 402 can do.

The converter 403 may perform a voltage conversion operation on power transferred in both directions between the power conversion device outlet 433 and the battery 500 and the distributed power supply 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 hydro 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 receives a signal including the power conversion result of the power conversion device 400. have.

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

Referring to FIG. 5, a 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 rotational operation of the motor.

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

In FIG. 6, for convenience of explanation, the generation amount detection unit 120 is indicated by a “detector” and the power generation control unit 140 is indicated by a “control unit”.

6 to 8, in the initial load control system 100 for connecting the generator power system 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 by using the rotational force of the steam turbine 230 (S612).

That is, the power generation unit 110 supplies cooling water from the feed pump 210 to the boiler 220, and the boiler 220 generates superheated steam by applying heat to the coolant supplied from the feed pump 210, and The turbine 230 receives superheated steam generated from the boiler 220 and rotates, 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 converts 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 transformer 320 After adjusting to a low voltage through ), the low-voltage AC power is converted to DC through the AC-DC converter 330 and then transmitted to the power system through the main bus 350.

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

The power generation control unit 140 determines whether the amount of power generation of the power generation unit 110 is more than a certain level (S640).

That is, the power generation control unit 140, in the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode), the turbine power generation state (TBN/GEN STATUS) is reset and online (Reset And Online) state, the generation amount detection unit 120 Through this, it is possible to determine whether the detected power generation amount exceeds 3 megawatts (MW).

The power generation control unit 140 sets an initial load including a load rate and a target load when the power generation amount of the power generation unit 110 is more than a certain level (S650).

That is, when the output of the power generation unit 110 exceeds 3 megawatts (MW), the power generation control unit 140 sets the turbine mode to megawatts (MW), and sets the load rate to 10% (60 MW/minute). ), 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).

Accordingly, 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 the transaction load 441 or a household load ( 442).

7 is a block diagram schematically showing the internal configuration of the generator control apparatus 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. It may include (760).

The generator control apparatus 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 commands 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 audio.

The microprocessor 730 controls the switching 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 more than a certain amount, as shown in FIG. 8, an initial load including a load rate and a target load 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 FIG. 8, the microprocessor 730 is in the synchronous mode (SYNCH MODE) is the auto mode (Auto Mode), the turbine power generation state (TBN/GEN STATUS) is reset online (Reset And Online) state, the amount of generation It is determined whether the power generation amount of the power generation unit 110 detected through the detection unit 120 exceeds 3 megawatts (MW).

Subsequently, when the power generation amount of the power generation unit 110 exceeds 3 megawatts (MW), the microprocessor 730 sets the turbine mode to megawatts (MW), as shown in FIG. , The load rate can be set to 10% (60MW/min), and the target load can be set to 50MW.

Accordingly, the microprocessor 730 may control the power generation operation of the power generation unit 110 using the rotational force of the steam turbine 230 until the amount of power generation of the power generation unit 110 reaches the target load. That is, the microprocessor 730 controls the number of rotations of the steam turbine 230 so that power capable of achieving a set load ratio and a target load is generated.

The generator connection part 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 of the above-described configuration, the steam turbine 230 accelerates at a speed of 3,600 rpm during the initial operation of the generator 250, and the amount of power generated from the power 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 ratio 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, since the power system when the distributed power supply 300 is at risk of being dropped or dropped from the power system is more unstable than the power system in a normal state, the power system is unstable through the input unit 710. According to this, the control logic for stabilization of the power system can be different. That is, the microprocessor 730 receives independent operation information of the distributed power supply connected 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 100 may reduce instability of the power system due to fluctuations in the output of the distributed power supply.

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. It is possible to realize a generator power system connection initial load control method and system that enables a stable connection with the power system by automatically setting the load target and controlling the initial load.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and that various substitutions, modifications and changes are possible within the scope of the technical spirit of the present invention. It will be obvious to those who have the knowledge of.

100: Generator power system connection initial load control system
110: power generation unit 120: power generation amount detection unit
130: switching unit 140: power generation control unit
210: feed pump 220: boiler
230: steam turbine 240: condenser
250: generator 310: first switching element
320: phase substitution transformer 330: AC-DC converter
340: bus switch 350: main bus
300: distributed power supply 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: trading load 442: household load
500: battery 510: second switching element
520: DC-AC converter 530: load
600: EMS 700: generator control unit
710: generator connection 720: switching connection
730: detection connection unit 740: input unit
750: main control unit 760: output unit

Claims (18)

A power generation unit that generates electricity by using the rotational force of the steam turbine;
A power generation amount detection unit for detecting the power generation amount of the power generation unit;
A switching unit for switching the output of the power generation unit and connecting it to a 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 amount of the power generation unit is more than a certain amount, an initial load including a load rate and a target load is automatically set, and then reaches the target load. A power generation control unit for controlling the power generation of the power generation unit until;
Generator power system connection initial load control system comprising a.
The method of claim 1,
The power generation control unit is a generator power system connection initial load control system including a distributed control system (DCS).
The method of claim 1,
The power generation unit,
A feed pump for supplying cooling water;
A boiler generating superheated steam by applying heat to the cooling water supplied from the feed water pump;
The 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;
A generator generating electricity by the rotational force of the steam turbine;
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 that adjusts the voltage level of the high voltage power output from the power generation unit to a low voltage; And
An AC-DC converter converting the low voltage AC power into DC;
Generator power system connection initial load control system comprising a.
The method of claim 4,
The first switching element is one of a solid state circuit breaker (SSCB), an AC circuit breaker, and an electronic switching element.
The method of claim 1,
The power system, a power conversion device, a distributed power supply, a generator power system connection initial load control system including a battery and EMS (Energy Management System).
The method of claim 1,
The power generation control unit, the power generation unit detected through the power generation amount detection unit in a synchronous mode (SYNCH MODE) is an Auto mode (Auto Mode) and a turbine power generation state (TBN/GEN STATUS) is a reset and online state. Generator power system connection initial load control system that determines whether the power generation exceeds 3 megawatts (MW).
The method of claim 7,
The power generation control unit, when the generation amount of the power generation unit exceeds 3 megawatts (MW), sets the turbine mode to megawatts (MW), sets the load rate to 10% (60MW/min), and sets the target After setting the load to 50MW, the generator power system connection initial load control system for controlling the power generation of the power generation unit up to the target load.
The method of claim 1,
The power system,
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;
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 conversion device outlet, and is connected to a transaction load and a household load, and a generator power system connection initial load control system.
As an initial load control method for connecting a generator power system of a system including a power generation unit and a detection unit, a switching unit and a power generation control unit,
(a) controlling, by the power generation control unit, power generation of the power generation unit;
(b) generating electricity by the power generation unit using the rotational force of the steam turbine;
(c) switching, by the power generation control unit, the connection of the switching unit so that the output of the power generation unit is connected to a 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, a power generation amount of the power generation unit;
(f) determining, by the power generation control unit, whether the power generation amount of the power generation unit is more than a certain amount; 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 more than a certain amount;
Generator power system connection initial load control method comprising a.
The method of claim 11,
(h) controlling, by the power generation control unit, power generation of the power generation unit to a target load;
A method for controlling the initial load of the generator power system connection further comprising a.
The method of claim 11,
In the step (f), the power generation control unit, in the synchronous mode (SYNCH MODE) is the Auto mode (Auto Mode), the turbine power generation state (TBN/GEN STATUS) is reset and online (Reset And Online) state, through the detection unit Generator power system connection initial load control method for determining whether the detected power generation amount exceeds 3 megawatts (MW).
The method of claim 13,
In the step (f), the power generation control unit sets the turbine mode to megawatts (MW) when the power generation amount of the power generation unit exceeds 3 megawatts (MW), and sets the load rate to 10% (60MW/minute). ), and the target load is set to 50MW, the initial load control method for connecting the generator power system.
A generator control device that controls a generator that generates electricity by using the rotational force of a steam turbine, switches an output of the generator to control a switching unit connected to a power system, and detects the amount of generation of the power generation unit through a power generation detection unit,
A generator connection part connected to the generator;
A switching connection connected to the switching unit;
A detection connection part connected to the power generation detection part;
An input unit for receiving a command or data necessary for controlling the generator;
A microprocessor for switching and connecting the output of the power generation unit to the power system, and setting an initial load including a load rate and a target load when the power generation amount of the power generation unit is more than a certain amount; And
An output unit for outputting a control status of the generator and the switching unit on a screen, or outputting a power generation amount of the power generation unit, an input status through the input unit, and a control processing status of the microprocessor through a screen or audio;
Generator control device comprising a.
The method of claim 15,
The microprocessor controls the power generation of the power generation unit to a target load.
The method of claim 15,
The microprocessor, the power generation unit detected through the power generation detection unit in a synchronous mode (SYNCH MODE) is an Auto mode (Auto Mode) and a turbine power generation state (TBN/GEN STATUS) is a reset and online state. Generator control device that determines whether the amount of power generation exceeds 3 megawatts (MW).
The method of claim 17,
The microprocessor sets the turbine mode to megawatts (MW) when the power generation amount of the power generation unit exceeds 3 megawatts (MW), and sets the load rate to 10% (60MW/min), and the target Generator control unit, setting the load to 50 MW.

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