WO2016170653A1 - Système de turbine à vapeur - Google Patents

Système de turbine à vapeur Download PDF

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Publication number
WO2016170653A1
WO2016170653A1 PCT/JP2015/062421 JP2015062421W WO2016170653A1 WO 2016170653 A1 WO2016170653 A1 WO 2016170653A1 JP 2015062421 W JP2015062421 W JP 2015062421W WO 2016170653 A1 WO2016170653 A1 WO 2016170653A1
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WO
WIPO (PCT)
Prior art keywords
power
steam
heat pump
steam turbine
cooling
Prior art date
Application number
PCT/JP2015/062421
Other languages
English (en)
Japanese (ja)
Inventor
守 木村
尚弘 楠見
日野　徳昭
白石　朋史
コーテット アウン
正利 吉村
Original Assignee
株式会社日立製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to PCT/JP2015/062421 priority Critical patent/WO2016170653A1/fr
Publication of WO2016170653A1 publication Critical patent/WO2016170653A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether

Definitions

  • the present invention relates to a steam turbine system.
  • Patent Document 1 the nighttime surplus power is used to store heat in the refrigerator, and during the daytime when power demand increases, the stored heat energy is used as cooling energy for the condenser to achieve power leveling. Is disclosed.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide a steam turbine system that can efficiently reduce the output to the power system when the amount of electric power introduced into the renewable energy increases. is there.
  • a steam turbine system of the present invention is a steam turbine system connected to a power system to which a power generation system that generates power using renewable energy is connected, and is driven by steam.
  • a turbine a condenser that cools the steam discharged from the turbine to a liquid, a cooling circuit that circulates a cooling refrigerant for cooling the steam in the condenser, and the cooling
  • a heat pump that cools the cooling refrigerant flowing through the circulation path; and a first detection unit that detects a change in power demand in the power system when power equal to or greater than a predetermined power is supplied from the power generation system to the power system; A part of the power supplied to the power system is supplied to the heat pump based on the change in the power demand detected by the detecting means, and the heat pump And a control device to be driven.
  • the block diagram of the electric power system containing the steam turbine system which concerns on the 1st Embodiment of this invention is shown. It is a graph which shows the time change of the wind power generated in wind power generation.
  • the block diagram of the electric power system containing the steam turbine system which concerns on the 2nd Embodiment of this invention is shown.
  • the block diagram of the electric power system containing the steam turbine system which concerns on the 3rd Embodiment of this invention is shown.
  • the block diagram of the electric power system containing the steam turbine system which concerns on the 4th Embodiment of this invention is shown.
  • FIG. 1 shows a configuration diagram of an electric power system including a steam turbine system 20 according to the first embodiment.
  • the steam turbine system 20 includes a turbine 1, a generator 2, a boiler 4, a pump 5, a condenser 6, a circulation path 7, a low-temperature heat source 8, a cooling circulation path 9, a pump 10, A heat pump 11, power detectors 12 to 14, and a control device 15 are mainly provided.
  • the steam turbine system 20 is a system called a base load power source such as a nuclear power generation system or a coal thermal power generation system.
  • the boiler 4 heats a refrigerant such as water to make it steam.
  • the turbine 1 is driven by the steam from the boiler 4 and converts the kinetic energy of the steam into mechanical rotational motion.
  • a generator 2 is connected to the turbine 1, and the generator 2 generates power using the rotation of the turbine 1 and outputs it to the power system 3.
  • a cooling circuit 9 is connected to the condenser 6, and water pumped from a low-temperature heat source 8 such as the sea or river by the pump 10 is supplied to the condenser 6.
  • a low-temperature heat source 8 such as the sea or river by the pump 10
  • heat exchange is performed between the steam from the turbine 1 in the circulation path 7 and the water pumped in the cooling circulation path 9.
  • the degree of vacuum in the condenser 6 depends on the temperature of the low-temperature heat source 8.
  • the low-temperature heat source 8 is the sea or a river
  • the water temperature is lower in the winter than in the summer, so the degree of vacuum in the condenser 6 is higher in the winter, and the thermal efficiency of the steam turbine system 20 is improved.
  • the heat pump 11 is provided so as to include a cooling circuit 9 positioned between the condenser 6 and the pump 10.
  • the heat pump 11 includes, for example, a compressor, an expansion valve, a condenser, and an evaporator. Then, the water pumped up by the pump 10 is cooled by the low temperature part (evaporator) of the heat pump 11, and the cooled water is supplied to the condenser 6.
  • the power detector 12 detects the power generated by the generator 2.
  • the power detector 14 detects power input to the heat pump 11.
  • the power detector 13 detects demand power of the power system 3. A change in power demand in the power system 3 is detected by the power detector 13. For example, when the power demand in the power system 3 decreases, the power detected by the power detector 13 decreases.
  • the power detector 12 corresponds to second detection means
  • the power detector 13 corresponds to first detection means
  • the power detector 14 corresponds to third detection means.
  • the control device 15 controls the operation of the steam turbine system 20.
  • the power system 3 is connected to a power generation system 16 that generates power using renewable energy such as wind power.
  • FIG. 2 is a graph showing temporal changes in wind power generation in wind power generation.
  • the vertical axis represents the ratio (%) of the maximum power generation (rated power) of wind power generation, and the horizontal axis represents time (seconds).
  • the wind power fluctuates, and includes fluctuations of various periods from a long period of 100 seconds or more to a short period of 1 second or less.
  • the power generation system 16 Power is excessively supplied to the power system 3.
  • 70% of the wind power generation corresponds to the predetermined power.
  • the control device 15 Based on the change detected by the power detector 13 (output fluctuation from the steam turbine system 20 to the power system 3), the control device 15 generates a part of the power (surplus) that is generated by the generator 2 and supplied to the power system 3. The power is controlled to flow to the heat pump 11 side. Note that the control device 15 adjusts the amount of power to be supplied to the heat pump 11 according to the amount of change in power demand detected by the power detector 13.
  • the heat pump 11 is driven, the water pumped up by the pump 10 as described above is cooled by the evaporator of the heat pump 11, the cooled water is supplied to the condenser 6, and the vacuum in the condenser 6 is The degree becomes higher.
  • the thermal efficiency of the steam turbine system 20 can be improved by the surplus power. Accordingly, when the amount of introduced renewable energy increases, the output from the steam turbine system 20 to the power system 3 can be efficiently reduced.
  • the change in the power demand in the power system 3 is detected by the power detector 13, an increase in the amount of introduced power in the power generation system 16 (a decrease in power demand in the power system 3) can be detected immediately. Therefore, it is possible to immediately execute control for inputting surplus power to the heat pump 11.
  • the control device 15 acquires the power values of the power detectors 12 and 14 when the surplus power is supplied to the heat pump 11, and grasps the power values detected by the power detectors 12 to 14. Thereby, by flowing surplus power to the heat pump 11, the power value detected by the power detector 13 changes abruptly. However, since the power values of the power detectors 12 and 14 are grasped, the power system 3 The operation of the steam turbine system 20 can be continued without determining that an accident has occurred.
  • FIG. 3 shows a configuration diagram of an electric power system including a steam turbine system 120 according to the second embodiment.
  • the same reference number is attached
  • subjected and description is abbreviate
  • a heating circulation path 33 is connected to a high temperature portion of the heat pump 11, and a heater 34 is provided between the condenser 6 and the pump 5.
  • the heating refrigerant in the heating circulation path 33 is warmed by the high-temperature portion (condenser) of the heat pump 11, and the warmed refrigerant is heated. 34.
  • the water from the condenser 6 is warmed by the warmed refrigerant, so that the temperature difference in the circulation path 7 can be increased, and the steam turbine system 120 can be operated with higher efficiency. Can do.
  • FIG. 4 shows a configuration diagram of an electric power system including a steam turbine system 220 according to the third embodiment.
  • the same reference number is attached
  • subjected and description is abbreviate
  • the steam turbine system 220 includes a power converter (inverter) 41 for variable speed control of a motor (for example, a compressor motor) in the heat pump 11.
  • a power converter for example, a compressor motor
  • FIG. 5 shows a configuration diagram of an electric power system including a steam turbine system 320 according to the fourth embodiment.
  • the same reference number is attached
  • subjected and description is abbreviate
  • the steam turbine system 320 includes two heat pumps 52 and 54 and power converters 51 and 53 corresponding to the heat pumps 52 and 54.
  • the steam turbine system 320 includes two heat pumps 52 and 54 and power converters 51 and 53 corresponding to the heat pumps 52 and 54.
  • the above steam turbine system may be used in a combined cycle or a nuclear power plant regardless of what the fuel is.
  • the change in power demand is detected based on power, it may be detected based on frequency or voltage.

Abstract

L'invention concerne un système de turbine à vapeur apte à réduire de manière efficace la sortie vers un système d'alimentation lorsque la quantité d'alimentation d'énergie renouvelable introduite a augmenté. Ce système de turbine à vapeur 20 est équipé : d'une turbine 1 fonctionnant à la vapeur ; d'un condenseur 6 destiné à refroidir la vapeur évacuée depuis la turbine 1 et à convertir cette vapeur en liquide ; d'un passage de circulation de refroidissement 9, dans lequel circule un réfrigérant de refroidissement destiné à refroidir la vapeur dans le condenseur 6 ; d'une pompe à chaleur 11 destinée à refroidir le réfrigérant de refroidissement circulant dans le passage de circulation de refroidissement 9 ; d'un détecteur d'alimentation 13 destiné à détecter un changement de la demande d'alimentation d'un système d'alimentation 3 lorsqu'une quantité supérieure à une quantité d'alimentation prescrite est fournie au système d'alimentation 3 depuis un système de génération d'alimentation 16 ; et d'un dispositif de commande 15 destiné à fournir une partie de l'alimentation fournie au système d'alimentation 3 à la pompe à chaleur 11 et entraînant ainsi la pompe à chaleur 11, sur la base d'un changement de la demande d'alimentation telle que détectée par le détecteur d'alimentation 13.
PCT/JP2015/062421 2015-04-23 2015-04-23 Système de turbine à vapeur WO2016170653A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/062421 WO2016170653A1 (fr) 2015-04-23 2015-04-23 Système de turbine à vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/062421 WO2016170653A1 (fr) 2015-04-23 2015-04-23 Système de turbine à vapeur

Publications (1)

Publication Number Publication Date
WO2016170653A1 true WO2016170653A1 (fr) 2016-10-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113669157A (zh) * 2021-06-30 2021-11-19 华电国际电力股份有限公司深圳公司 一种结合风电的燃气蒸汽发电系统及其发电方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093868A (en) * 1974-04-29 1978-06-06 Manning John I Method and system utilizing steam turbine and heat pump
JPH06129210A (ja) * 1992-10-21 1994-05-10 Shimizu Corp 熱電供給システム
JP2011231778A (ja) * 2011-08-26 2011-11-17 Fujita Corp 廃熱利用システム
JP2015046984A (ja) * 2013-08-27 2015-03-12 住友電気工業株式会社 風力発電システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093868A (en) * 1974-04-29 1978-06-06 Manning John I Method and system utilizing steam turbine and heat pump
JPH06129210A (ja) * 1992-10-21 1994-05-10 Shimizu Corp 熱電供給システム
JP2011231778A (ja) * 2011-08-26 2011-11-17 Fujita Corp 廃熱利用システム
JP2015046984A (ja) * 2013-08-27 2015-03-12 住友電気工業株式会社 風力発電システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113669157A (zh) * 2021-06-30 2021-11-19 华电国际电力股份有限公司深圳公司 一种结合风电的燃气蒸汽发电系统及其发电方法

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