JP2011032901A - Power generating device and drive control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power generating device stably accelerating a turbo machine up to a rated rotation speed even when the electric capacity of a starting device is not large. <P>SOLUTION: The power generating device includes a heat receiver 120 receiving sunlight and supplying heat medium having a heat quantity according to the received light, a power generator 80 increasing and decreasing driving force according to a supplied amount of electric power when electric power is supplied, and generating electric power at a power generation capacity according to control when electric power is not supplied, the starting device 60 detecting the heat quantity and supplying electric power to the power generator 80 or controlling the power generating capacity of the power generator 80 to compensate a variation of the detected heat quantity, and a turbine 130 driven by the heat medium supplied from the heat receiver 120 and the driving force of the power generator 80. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power generation apparatus that generates power by solar heat and a drive control method.

  In recent years, from the viewpoint of preventing global warming and reducing the use of fossil fuels, power generation using clean energy such as natural energy that emits less harmful substances such as carbon dioxide and nitrogen oxides, and recycled energy that recycles resources Attention has been paid. As a power generation system using natural energy, power generation by solar thermal energy using a power generation technology such as a gas turbine, a steam turbine and a cas turbine combined cycle (GTCC) is expected.

  Here, the turbine (turbo machine) of the solar power generator cannot be activated by itself, and requires an activation device (control device) for activation. For this reason, the turbine of the solar thermal power generator is started by a static starter using an electric motor and a torque motor or a power converter (see Non-Patent Document 1).

Yoshinori Tanaka, Yutaka Kawashima, and 3 other authors, “Development of gas turbine starter with large voltage inverter”, Mitsubishi Heavy Industries Technical Report Vol. 33 No. 6 (1996-11)

  After reaching the self-sustainable rotation speed by the starter, if you try to start the turbine by combining high-pressure gas (heat medium) heated by solar heat, the heat input by the sun will be affected by the weather. There is a problem that tends to become unstable. On the other hand, if an attempt is made to accelerate the turbine to the rated rotational speed using only the starting device, there is a problem that the electric capacity required for the starting device increases even if the starting is stabilized.

  The present invention has been made in view of the above points, and provides a solar power generator that can stably accelerate a turbine (turbo machine) to a rated rotational speed without increasing the electric capacity of the starter. The purpose is to provide.

  The present invention has been made in order to solve the above-described problems, and receives heat when receiving sunlight and supplying a heat medium having a heat quantity corresponding to the received light, and is supplied when power is supplied. The driving force is increased or decreased according to the amount of electric power, and when the electric power is not supplied, the generator that generates electric power with the amount of electric power generated according to the control, the heat amount is detected, and the fluctuation of the detected heat amount A controller for supplying the power to the generator or controlling the power generation amount of the generator so as to compensate, the heat medium supplied from the heat receiver, and driving by the driving force of the generator And a turbomachine.

  In the present invention, the control device controls the generator so as to compensate for fluctuations in the amount of heat in a process from the start of the turbo machine to the time when the generator supplies the electric power to an external system. It is a power generator characterized by this.

  According to the present invention, the control device compensates for fluctuations in the amount of heat in the process from the start of the turbomachine to the synchronization of the phase of the generator voltage and the phase of the system voltage. The generator is characterized by controlling the generator.

  In the present invention, the control device increases the amount of electric power to be supplied when the detected amount of heat is equal to or less than a predetermined amount of heat, and the detected amount of heat is equal to or greater than a predetermined amount of heat. Further, the power generation device is characterized in that the amount of power supplied is reduced.

  In the present invention, the control device increases the amount of electric power to be supplied when the detected amount of heat is equal to or less than a predetermined amount of heat, and the detected amount of heat is equal to or greater than a predetermined amount of heat. Further, the power generator is configured to cause the generator to generate power.

  Further, the present invention is the power generation device, wherein the control device detects a rotational speed of the turbomachine instead of detecting the amount of heat.

  In addition, the present invention includes a heat amount prediction unit that predicts transition of the heat amount, and when the heat amount is predicted to recover to a predetermined heat amount, the control device determines a rotation speed of the turbomachine in advance. The power generation apparatus is characterized in that the electric power supplied to the generator is controlled so as to have a high rotational speed.

  The present invention also includes a heat receiver that receives sunlight and supplies a heat medium having a heat amount corresponding to the received light, a control device that detects the heat amount, a generator that is driven in accordance with an excited magnetic force, The heat medium supplied from the heat receiver, the turbomachine driven by the generator, a heat amount prediction unit that predicts the transition of the heat amount, and the heat amount is recovered to a predetermined heat amount by the heat amount prediction unit. And an exciter that excites the generator so that the rotational speed of the turbomachine becomes a predetermined rotational speed according to the amount of heat detected by the control device when predicted. This is a featured power generator.

  The present invention is also a drive control method in a power generation device, wherein a heat receiver receives sunlight and supplies a heat medium having a heat quantity corresponding to the received light, and the generator is supplied with electric power. In this case, the driving force is increased / decreased according to the amount of supplied electric power, and when the electric power is not supplied, the step of generating electric power with the amount of electric power generated according to control, and the control device detects the amount of heat, Supplying the power to the generator or controlling the power generation amount of the generator so as to compensate for the detected variation in the amount of heat; and the heat medium supplied from the heat receiver by a turbo machine, And a step of being driven by the driving force of the generator.

  According to the present invention, the starter of the solar power generator generator assists the turbomachine drive by the amount of fluctuation even if the amount of heat input fluctuates, so that the turbomachine is rated without increasing the electric capacity of the starter. It can be accelerated stably up to the rotational speed.

  If the heat input is predicted to recover even if the heat input by the sun decreases due to bad weather, etc., the starter waits for the recovery of the heat input while operating the turbomachine on standby with low power. be able to.

It is a block diagram which shows the structure of the electric power generating apparatus in the 1st Embodiment of this invention. It is a figure which shows operation | movement (when there is no heat input fluctuation | variation) of the electric power generating apparatus in the 1st Embodiment of this invention. It is a figure for demonstrating operation | movement (when the amount of heat input increases) in the 1st Embodiment of this invention. It is a figure for demonstrating operation | movement (when the amount of heat input falls) in the 1st Embodiment of this invention. It is a figure for demonstrating operation | movement of the electric power generating apparatus in the 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement (after reaching a rated rotational speed) of the electric power generating apparatus in the 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement (system connection) of the electric power generating apparatus in the 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement (when the starting device 60 does not supply electric power to the generator 80) in the 3rd Embodiment of this invention. It is a figure for demonstrating operation | movement (when the starting device 60 supplies electric power to the generator 80) of the electric power generating apparatus in the 3rd Embodiment of this invention.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of the power generation device according to the first embodiment of the present invention.

  When the turbine 130 is started, the power generation apparatus supplies electric power acquired from an external system to the generator 80 that operates as an electric motor, and is heated by the driving force of the generator 80 that operates as an electric motor and solar heat to become high pressure. The turbine 130 is started by the gas.

  Next, the power generation device switches the operation mode of the generator 80 so as to operate as a generator, and further rotates the turbine 130 with high-pressure gas heated by solar heat, so that power is generated from the generator 80 to an external system. Supply.

  The power generator (solar power generator) in the first embodiment includes a main transformer 10, a transformer 20, an excitation breaker 30, an exciter 40, starter breakers 50a and 50b, and a starter ( Control device) 60, generator breaker 70, generator 80, compressor 90, reheater 100, heliostat 110, heat receiver 120, and turbine 130 (turbo machine). The starter 60, the excitation breaker 30, the exciter 40, and the heliostat 110 are respectively controlled by a control terminal (not shown) of the power generator.

  The main transformer 10 transforms the voltage acquired from the starter 60 through the starter breaker 50a, and supplies power corresponding to this voltage to the system. Moreover, the main transformer 10 transforms the voltage acquired from the generator 80 via the generator breaker 70, and supplies the electric power according to this voltage to a system | strain.

  The main transformer 10 transforms the system voltage and supplies the starter 60 with power corresponding to the system voltage via the starter breaker 50a. Further, the main transformer 10 transforms the system voltage and supplies the generator 80 with electric power corresponding to the system voltage via the generator circuit breaker 70.

  The transformer 20 transforms the system voltage and supplies the system power to the exciter 40 via the excitation circuit breaker 30.

  The excitation breaker 30 is controlled by a control terminal (not shown) of the power generator, and connects the transformer 20 and the exciter 40 in the ON state, and insulates the transformer 20 and the exciter 40 in the OFF state.

  The exciter 40 excites the generator 80 with a predetermined constant strength (constant excitation). Further, the exciter 40 adjusts the field magnetic flux applied to the generator 80 so that the output voltage of the generator 80 becomes constant by AVR (Automatic Voltage Regulator, automatic voltage adjustment) control. The exciter 40 may execute “field weakening control” on the generator 80. Here, the field weakening control is a control to decrease the counter electromotive force of the generator 80 by weakening the field magnetic flux applied to the generator 80 after constant excitation, thereby increasing the rotational speed of the generator 80. .

  The generator 80 is a generator with a brush, and is connected to the compressor 90 and the turbine 130 via rotating shafts 140a and 140b. The rotating shafts 140 a and 140 b rotate together with the compressor 90 and the turbine 130. The generator 80 is controlled by the activation device 60 and excited by the exciter 40. Further, the generator 80 is driven in two modes, an electric mode and a power generation mode, according to the control of the activation device 60.

  In the electric mode, the generator 80 operates as an electric motor and rotationally drives the rotary shafts 140a and 140b of the compressor 90 and the turbine 130 with a driving force (torque) corresponding to the amount of electric power supplied from the starting device 60.

  On the other hand, in the power generation mode, the power generator 80 operates as a power generator, and generates power by rotating the rotating shafts 140 a and 140 b together with the turbine 130. Further, the generator 80 supplies an amount of electric power (power generation amount) according to the control of the activation device 60 to the activation device 60 or the system.

  The compressor 90 is connected to the generator 80 and the turbine 130 via the rotating shafts 140a and 140b, and rotates together with the rotating shafts 140a and 140b as the generator 80 and the turbine 130 rotate. Further, the compressor 90 rotates to suck in gas from an inlet (not shown), compress the gas, and send the gas to the reheater 100.

  The reheater 100 acquires heat from the gas discharged from the turbine 130 and discharges the gas to an exhaust port (not shown). The reheater 100 heats the gas ejected from the compressor 90 with the heat of the gas discharged from the turbine 130, and sends the heated gas to the heat receiver 120.

  The heliostat 110 reflects sunlight and irradiates the heat receiver 120 with sunlight. Here, a plurality of heliostats 110 are provided, and the heliostat 110 is divided into a heliostat 110 that irradiates the heat receiver 120 with sunlight and a heliostat 110 that does not irradiate the heat receiver 120 with sunlight. The amount of heat input to the vessel 120 is controlled. Here, it is assumed that the heat input varies depending on the weather.

  The heat receiver 120 heats the gas (heat medium) acquired from the reheater 100 by solar heat, and jets the gas that has been heated to a high pressure to the turbine 130.

  The turbine 130 rotates with the rotary shafts 140a and 140b by the high-pressure gas. When the generator 80 operates in the electric mode, the turbine 130 rotates together with the rotating shafts 140a and 140b that are rotated by the driving force of the generator 80 that operates as the electric motor. On the other hand, when the generator 80 operates in the power generation mode, the turbine 130 rotates with the rotary shafts 140a and 140b, thereby causing the generator 80 operating as a generator to generate power.

  The starter circuit breaker 50a is controlled by the starter device 60, connects the starter device 60 and the main transformer 10 in the ON state, and insulates the starter device 60 and the main transformer 10 in the OFF state.

  The activation device breaker 50b is controlled by the activation device 60, and connects the activation device 60 and the generator 80 in the ON state, and insulates the activation device 60 and the generator 80 in the OFF state.

  The generator breaker 70 is controlled by the starter 60 and connects the main transformer 10 and the generator 80 in the ON state, and insulates the main transformer 10 and the generator 80 in the OFF state.

  The starting device (control device) 60 is a stationary starting device using, for example, a thyristor, and starts the turbine 130 by supplying electric power acquired from the system to the generator 80. In addition, the activation device 60 supplies the power generated by the generator 80 to the system according to a predetermined condition (step S5 in FIG. 4 and the like) described later. That is, the activation device 60 can receive power in both directions.

  In addition, the starter 60 controls the starter breakers 50a and 50b and the generator breaker 70. In addition, the activation device 60 controls switching between the electric mode and the power generation mode of the generator 80. Furthermore, the starter 60 detects the amount of heat of the gas in the heat receiver 120 and controls the driving force of the generator 80 in the electric mode according to the amount of heat, thereby stably starting the turbine 130. The starting device 60 may detect the rotational speed of the turbine 130 instead of detecting the amount of heat of the gas in the heat receiver 120.

  When starting the turbine 130, the starting device 60 first sets the generator 80 in the electric mode, and supplies power to the generator 80 while gradually increasing the power to a predetermined amount of power (acceleration processing). Thereby, the turbine 130 is accelerated by the driving force of the generator 80 to a predetermined rotational speed (for example, 20% with respect to the rated rotational speed).

  In accordance with predetermined conditions (steps S3 and S6 in FIG. 4) to be described later, the starter 60 maintains the amount of power supplied to the generator 80, thereby making the rotational speed of the turbine 130 constant (constant speed processing, And constant speed assistance).

  When there is no change in the amount of heat input due to solar heat, the predetermined second speed is reached after the rotational speed of the turbine 130 reaches a predetermined first rotational speed (for example, 20% of the rated rotational speed). Until the rotational speed is reached (for example, 65% of the rated rotational speed) (first acceleration assist period), the starter 60 uses a driving force of the generator 80 and heat input by solar heat to generate a turbine. 130 is accelerated (first specified rate acceleration assistance). In addition, during the period from when the rotational speed of the turbine 130 reaches the predetermined second rotational speed until the rotational speed reaches the rated rotational speed (second acceleration assist period, self-sustained acceleration period), the starter 60 is operated by solar heat. The turbine 130 is accelerated using only the heat input by the second (second prescribed rate acceleration assistance).

  On the other hand, when there is a variation in the amount of heat input due to solar heat, the starter 60 is a period from when the rotational speed of the turbine 130 reaches the predetermined first rotational speed until the rated rotational speed is reached (acceleration assistance period). Uses the driving force of the generator 80 and heat input by solar heat to accelerate the turbine 130 (regulated rate acceleration assistance). When the amount of heat input by solar heat fluctuates, the starter 60 controls the amount of power supplied to the generator 80 in the electric mode or the amount of power generated by the generator 80 in the power generation mode so as to compensate for fluctuations in the rotational speed of the turbine 130. To do. These control procedures will be described later in the description of FIGS. The starter 60 compensates for fluctuations in the rotational speed of the turbine 130 from when the rotational speed of the turbine 130 reaches the rated rotational speed until the generator 80 supplies power to the external system. It may be.

Next, the operation of the power generator will be described.
2-4 is a figure which shows operation | movement of the electric power generating apparatus in the 1st Embodiment of this invention. 2 to 4, the vertical axis in the upper stage represents the rotational speed [%] when the rated rotational speed of the turbine 130 is 100% and the heat input necessary for the generator 80 to output the rated power to 100%. And the output (power) [%] of the generator 80 when the rated power of the generator 80 is 100%. The horizontal axis at the top indicates time.

  The vertical axis in the middle indicates the amount of power that the starter 60 supplies to the generator 80 in the electric mode and the amount of power that the starter 60 acquires from the generator 80 in the power generation mode. The horizontal axis in the middle indicates time.

  The lower vertical axis represents the operation of the starter breakers 50a and 50b, the control (operation) of the starter 60, the operation of the generator breaker 70, the operation of the excitation breaker 30, and the exciter 40. The control (operation) and the operation of the heliostat 110 are shown. The lower horizontal axis indicates time.

  First, it is assumed that the starter breakers 50a and 50b, the generator breaker 70, and the excitation breaker 30 are in the OFF state. Further, it is assumed that the starter 60 does not supply power to the generator 80 and has not started the start of the turbine 130. In addition, the heliostat 110 irradiates the heat receiver 120 with sunlight and preheats the heat receiver 120. Further, it is assumed that the exciter 40 does not excite the generator 80 (step S1).

  Next, the power generator starts to start the turbine 130. Specifically, the exciter 40 excites the generator 80 to a certain degree. In addition, the activation device 60 turns on the activation device circuit breakers 50a and 50b and the excitation circuit breaker 30. Further, the activation device 60 sets the generator 80 in the electric mode, and supplies power to the generator 80 while gradually increasing the power to a predetermined power amount A (acceleration processing). As a result, the rotational speed of the turbine 130 is gradually accelerated to, for example, 20% of the rated rotational speed by the driving force of the generator 80 (step S2).

  Next, the starting device 60 maintains the amount of electric power A to the generator 80, thereby making the rotational speed of the turbine 130 constant (constant speed processing) (step S3).

  Next, in step S4, since the turbine 130 is accelerated by the driving force of the generator 80 operating as an electric motor and the gas heated to high pressure by solar heat, the sufficiently preheated heat receiver 120 becomes high pressure. The discharged gas is ejected to the turbine 130 (heat input). In addition, the activation device 60 starts detecting the amount of heat of the gas in the heat receiver 120. Further, the heliostat 110 increases the amount of heat input in order to accelerate the turbine 130 to the rated rotational speed that is the target speed by heat input control (target acceleration). The exciter 40 may continue constant excitation, but the turbine 130 may be accelerated by field weakening control instead of constant excitation.

  In addition, the starter 60 compensates for fluctuations in heat input in order to accelerate the turbine 130 at a specified rate of rotation speed (specified rate acceleration assist processing). Here, for example, it is assumed that the heat input amount has decreased with respect to a specified rate of heat input amount (broken line of “heat input” in FIG. 3) due to a change in weather (upper part of FIG. 3: step S4). The activation device 60 detects the decrease in the heat input amount, increases the power amount by the amount of power corresponding to the decreased heat input amount, and supplies the increased power amount to the generator 80 in the electric mode. The fluctuation of the rotational speed of the turbine 130 due to the fluctuation of the heat input amount is compensated.

  On the other hand, when the heat input increases with respect to the specified rate of heat input (broken line in FIG. 4 “heat input”) (upper part of FIG. 4: step S4), the starter 60 detects the increase in heat input. By reducing the amount of power corresponding to the increased amount of heat input and supplying the reduced amount of power to the generator 80 in the electric mode, the variation in the rotational speed of the turbine 130 due to the variation in the amount of heat input is compensated. To do.

  The starting device 60 supplies power to the generator 80 operating in the electric mode for a predetermined time (step S4). The starting device 60 detects the rotational speed of the turbine 130 regardless of the predetermined time, so that the rotational speed of the turbine 130 is reduced to a predetermined rotational speed (for example, 65 with respect to the rated rotational speed). %) May be supplied to the generator 80 until it is accelerated.

  Next, the starter 60 stops the power supply to the generator 80 operating as an electric motor in order to accelerate the turbine 130 to the rated rotational speed only by heat input by solar heat. Here, for example, it is assumed that the heat input amount has decreased with respect to a specified rate of heat input amount (dashed line of “heat input” in FIG. 3) due to a change in weather (upper part of FIG. 3: step S5). In this case, the starting device 60 resumes the supply of electric power to the generator 80 in the electric mode, and compensates for fluctuations in the rotational speed of the turbine 130 due to fluctuations in heat input.

  On the other hand, when the amount of heat input has increased with respect to the specified rate of heat input (broken line of “heat input” in FIG. 4) (upper part of FIG. 4: step S5), the starter 60 switches the generator 80 to the power generation mode, By controlling (adjusting) the amount of electric power acquired from the generator 80, fluctuations in the rotational speed of the turbine 130 due to fluctuations in the heat input amount are compensated (step S5).

  Next, it is assumed that the rotational speed of the turbine 130 is accelerated to the rated rotational speed (synchronous speed). The starting device 60 keeps power supply to the generator 80 operating as an electric motor stopped (supplied power amount “0”) (constant speed assistance). Similarly, the heliostat 110 is divided into a heliostat 110 that irradiates the heat receiver 120 with sunlight and a heliostat 110 that does not irradiate the heat receiver 120 with sunlight, thereby controlling the amount of heat input to the heat receiver 120. (Heat input control (constant speed)) (step S6). Hereinafter, the heat input amount (independent heat input amount) [%] in this case will be described as “35%” as an example. If there is an amount of heat input that exceeds the amount of heat that can be supported independently, the generator 80 can supply the generated power to the system.

  Next, the starter 60 switches the generator 80 to the power generation mode, further turns off the starter breakers 50a and 50b, and turns on the generator breaker 70 (system interconnection) (system synchronization). ). Thereby, electric power is supplied from the generator 80 to the system via the main transformer 10. Further, the heliostat 110 adjusts the number of heliostats 110 that irradiate the heat receiver 120 with sunlight so that the power supplied from the generator 80 to the system increases to the target output (rated output). Further, the exciter 40 performs AVR control so that the output voltage of the generator 80 becomes constant (step S7).

  When the starting device 60 is an starting device that cannot acquire power, the starting device 60 assists (compensates) the rotational speed only in the direction of accelerating the rotational speed of the turbine 130 (turbo machine). May be.

  As described above, in the process from the start of the turbine 130 (turbo machine) to the time when the generator 80 supplies power to the external system, the starter 60 can change the amount of heat input even if the heat input amount fluctuates. Since the drive of 130 is assisted (compensated), the turbine 130 can be stably accelerated to the rated rotational speed without increasing the electric capacity of the starter 60.

[Second Embodiment]
A second embodiment of the present invention will be described in detail with reference to the drawings.
In the second embodiment, the starter 60 compensates for fluctuations in the amount of heat input (the starter 60 is used as a buffer) only until the voltage phase of the generator 80 and the phase of the system voltage are synchronized. However, this is different from the first embodiment. Only the differences from the first embodiment will be described below.

The operation of the power generation device will be described.
FIG. 5 is a diagram for explaining the operation of the power generation device according to the second embodiment of the present invention. After the rotational speed of the turbine 130 reaches the rated rotational speed, in step Sa6 (corresponding to step S6 in FIGS. 2 to 4), the starter 60 switches the generator 80 to the power generation mode, and the generator 80 generates power. While the starter 60 buffers the electric power, the phase of the voltage of the generator 80 is synchronized with the phase of the system voltage (power generation control) (step Sa6).

  FIG. 6 is a diagram for explaining the operation of the power generation device (after reaching the rated rotational speed) in the second embodiment of the present invention, and is a diagram for explaining the state in step Sa6 in FIG. As shown in FIG. 6, the starter 60 switches the generator 80 to the power generation mode, and synchronizes the voltage and current phases of the generator 80 with the voltage and current phases of the system, Is output to the main transformer 10.

  FIG. 7 is a diagram for explaining the operation (system interconnection) of the power generation device according to the second embodiment of the present invention, and is a diagram for explaining the state in step Sa7 in FIG. As shown in FIG. 7, the starter 60 turns off the starter breakers 50a and 50b and turns the generator breaker 70 on (system interconnection, system synchronization), and stops control. Thereby, electric power is supplied from the generator 80 to the system via the main transformer 10.

  If it carries out as mentioned above, in the process from the starting of the turbine 130 (turbo machine) until the phase of the voltage of the generator 80 and the phase of the system voltage synchronize, the starting device 60 fluctuates the amount of heat input. Even so, the driving of the turbine 130 is supplemented (compensated) by that amount of fluctuation, so that the turbine 130 can be stably accelerated to the rated rotational speed without increasing the electric capacity of the starting device 60.

[Third embodiment]
A third embodiment of the present invention will be described in detail with reference to the drawings.
In the third embodiment, after the turbine 130 (turbo machine) reaches the rated rotational speed, when the heat input amount decreases due to a change in weather or the like, the rotational speed of the turbine 130 is set based on the predicted recovery of the heat input amount. The point which operate | moves so that it may carry out standby operation with the predetermined rotational speed lower than a rated rotational speed is different from 1st and 2nd embodiment. Hereinafter, only differences from the first and second embodiments will be described.

  The power generation device includes a heat amount prediction unit (not shown) that predicts the transition of the heat input amount. A heat amount prediction unit (not shown) predicts the transition of the heat input amount based on, for example, a cloud distribution captured by a weather radar, and notifies the activation device 60 whether or not the heat input amount (weather) is expected to recover. To do.

  When there is no expectation that the amount of heat input (weather) will recover, a heat amount prediction unit (not shown) notifies the activation device 60 to that effect, and the power generation device stops power generation. On the other hand, when the heat input (weather) is expected to recover, the heat amount predicting unit (not shown) notifies the starter 60 to that effect, so that the starter 60 supplies power to the generator 80, and the turbine While waiting for operation of 130 (turbo machine), recovery of heat input is awaited.

Next, the operation of the power generator will be described.
First, for comparison, a case where the activation device 60 does not supply power to the generator 80 will be described. FIG. 8 is a diagram for explaining the operation of the power generation device according to the third embodiment of the present invention (when the starter 60 does not control the generator 80).

  The upper vertical axis represents the rotational speed [%] when the rated rotational speed of the turbine 130 is 100%, and the heat input amount when the heat input necessary for the generator 80 to output the rated power is 100%. [%] And the output (power) [%] of the generator 80 when the rated power of the generator 80 is 100% are shown. The horizontal axis at the top indicates time.

  In addition, the vertical axis in the middle indicates the amount of electric power (electricity) that the starter 60 supplies to the generator 80 and the amount of power (power generation) that the starter 60 acquires from the generator 80. The horizontal axis in the middle indicates time.

  The lower vertical axis represents the operation of the starter breakers 50a and 50b, the control (operation) of the starter 60, the operation of the generator breaker 70, the operation of the excitation breaker 30, and the exciter 40. The control (operation) and the operation of the heliostat 110 are shown. The lower horizontal axis indicates time.

  It is assumed that the amount of heat input decreases due to changes in the weather and the like, and the output of the generator 80 decreases according to the amount of heat input. Moreover, the rotational speed of the turbine 130 shall maintain the rated rotational speed (upper stage of FIG. 8). Moreover, since the generator 80 is generating electric power, it is assumed that the starter 60 has stopped supplying power to the generator 80 (middle in FIG. 8).

  Further, the starter circuit breakers 50a and 50b are in the OFF state. The generator breaker 70 is assumed to be in an ON state. The heliostat 110 adjusts the number of heliostats 110 that irradiate sunlight to the heat receiver 120 so that the power supplied from the generator 80 to the system maintains the target output (rated output). To do. Furthermore, it is assumed that the exciter 40 is performing AVR control so that the output voltage of the generator 80 becomes constant (step Sb1).

  Next, it is assumed that the heat input amount is lower than the self-sustainable heat input amount (35%) and the output of the generator 80 becomes 0%. Thereby, the starting device 60 switches the generator 80 to the electric mode. Further, the generator 80 acquires electric power from the system via the generator breaker without passing through the starter 60, and rotates the rotating shaft 140a to rotate the compressor 90 and the turbine 130 at the rated rotational speed. (Step Sb2).

  In this way, the power generation device causes the turbine 130 (turbo machine) to perform a standby operation and waits for the recovery of the heat input (step Sb3).

  Next, a case where the activation device 60 supplies power to the generator 80 will be described. FIG. 9 is a diagram for explaining the operation of the power generation device according to the third embodiment of the present invention (when the activation device 60 controls the generator 80).

  It is assumed that the amount of heat input decreases due to changes in the weather and the like, and the output of the generator 80 decreases according to the amount of heat input. Moreover, the rotational speed of the turbine 130 shall maintain the rated rotational speed (upper stage of FIG. 9). Moreover, since the generator 80 is generating electric power, it is assumed that the starting device 60 has stopped supplying power to the generator 80 (middle stage in FIG. 9).

  Further, it is assumed that the starter circuit breakers 50a and 50b are in the OFF state. The generator breaker 70 is assumed to be in an ON state. The heliostat 110 adjusts the number of heliostats 110 that irradiate sunlight to the heat receiver 120 so that the power supplied from the generator 80 to the system maintains the target output (rated output). To do. Furthermore, it is assumed that the exciter 40 is performing AVR control so that the output voltage of the generator 80 becomes constant (step Sc1).

  Next, it is assumed that the heat input amount is lower than the self-sustainable heat input amount (35%), and the output of the generator 80 becomes 0% (step Sc2).

  When there is no expectation that the amount of heat input (weather) will recover, the power generation prediction unit (not shown) notifies the activation device 60 to that effect, and the power generation device stops power generation (not shown). On the other hand, when the heat input (weather) is expected to recover, the heat amount prediction unit (not shown) notifies the starter 60 to that effect, so that the starter 60 switches the generator 80 to the electric mode and generates power. By supplying electric power (power amount B) to the machine 80, the turbine 130 (turbo machine) is made to stand by at a rotational speed lower than the rated rotational speed.

  Further, the starter 60 turns on the starter breakers 50a and 50b and turns the generator breaker 70 off. In this way, the power generation device causes the turbine 130 (turbo machine) to perform a standby operation and waits for the recovery of the heat input (step Sc3).

  Thus, if the starter 60 supplies power, the turbine 130 (turbo machine) can be put on standby at a rotational speed lower than the rated speed under the control of the starter 60. For this reason, even if the amount of heat input by the sun is reduced due to weather deterioration or the like, when it is predicted that the amount of heat input will recover, the starter device has less power compared to the case where the starter device 60 does not supply power. In this way, the recovery of the heat input can be waited while the turbo machine is in standby operation.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Main transformer 20 ... Transformer 30 ... Excitation circuit breaker 40 ... Exciter 50a and 50b ... Starting device circuit breaker 60 ... Starting device 70 ... Generator circuit breaker 80 ... Generator 90 ... Compressor 100 ... Reheater 110 ... heliostat 120 ... heat receiver 130 ... turbines 140a and 140b ... rotating shaft

Claims (9)

A heat receiver that receives sunlight and supplies a heat medium having an amount of heat according to the received light;
When electric power is supplied, the driving force is increased / decreased according to the supplied electric energy, and when the electric power is not supplied, a generator that generates electric power with the generated electric power according to the control,
A controller for detecting the amount of heat and supplying the power to the generator or controlling the amount of power generated by the generator so as to compensate for the variation in the detected amount of heat;
The heat medium supplied from the heat receiver, and a turbomachine driven by the driving force of the generator;
A power generation device comprising:   The control device controls the generator so as to compensate for fluctuations in the amount of heat in a process from the start of the turbo machine to the time when the generator supplies the electric power to an external system. Item 2. The power generation device according to Item 1.   The control device controls the generator so as to compensate for the variation in the amount of heat in the process from the start of the turbo machine until the phase of the generator voltage and the phase of the system voltage are synchronized. It controls, The electric power generating apparatus of Claim 1 characterized by the above-mentioned.   The control device increases the amount of power to be supplied when the detected amount of heat is equal to or less than a predetermined amount of heat, and supplies power when the detected amount of heat is equal to or greater than a predetermined amount of heat. The power generation device according to any one of claims 1 to 3, wherein the amount is reduced.   The control device increases the amount of electric power to be supplied when the detected amount of heat is equal to or less than a predetermined amount of heat, and when the detected amount of heat is equal to or greater than a predetermined amount of heat, the generator The power generator according to any one of claims 1 to 3, wherein the power is generated.   The power generation device according to any one of claims 1 to 5, wherein the control device detects a rotational speed of the turbomachine instead of detecting the amount of heat. A calorific value predicting unit for predicting the transition of the calorific value,
When it is predicted that the amount of heat will recover to a predetermined amount of heat,
The said control apparatus controls the said electric power supplied to the said generator so that the rotational speed of the said turbomachine may turn into a predetermined rotational speed, It is any one of Claims 1-6 characterized by the above-mentioned. The power generator described. A heat receiver that receives sunlight and supplies a heat medium having an amount of heat according to the received light;
A control device for detecting the amount of heat;
A generator driven according to the magnetized magnetic force,
The heat medium supplied from the heat receiver, and a turbomachine driven by the generator;
A calorific value predicting unit for predicting the transition of the calorific value;
When the heat quantity predicting unit predicts that the heat quantity is restored to a predetermined heat quantity, the rotational speed of the turbo machine becomes a predetermined rotational speed according to the heat quantity detected by the control device. An exciter for exciting the generator,
A power generation device comprising: A drive control method in a power generator,
A heat receiver receiving sunlight and supplying a heat medium having an amount of heat according to the received light; and
When the generator is supplied with electric power, the driving force is increased or decreased according to the supplied electric energy, and when the electric power is not supplied, generating with the generated electric power according to the control; and
A controller detects the amount of heat and supplies the power to the generator or controls the amount of power generated by the generator so as to compensate for the variation in the detected amount of heat;
A turbomachine is driven by the heat medium supplied from the heat receiver and the driving force of the generator;
The drive control method characterized by including.

Images