KR102310444B1 - Combined heat and power system operable in case of load loss of turbine generator - Google Patents

Combined heat and power system operable in case of load loss of turbine generator Download PDF

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KR102310444B1
KR102310444B1 KR1020190174189A KR20190174189A KR102310444B1 KR 102310444 B1 KR102310444 B1 KR 102310444B1 KR 1020190174189 A KR1020190174189 A KR 1020190174189A KR 20190174189 A KR20190174189 A KR 20190174189A KR 102310444 B1 KR102310444 B1 KR 102310444B1
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South Korea
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steam
control unit
turbine
heat exchanger
district heating
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KR1020190174189A
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Korean (ko)
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KR20210081847A (en
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김광홍
양원석
황도현
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한국수력원자력 주식회사
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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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
    • 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
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)

Abstract

본 발명은 터빈 발전기 부하상실시에도 작동가능한 열병합발전시스템에 관한 것으로, 증기발생기; 상기 증기발생기에서 발생한 증기를 받아 전기를 생산하는 터빈; 상기 터빈에서 추기한 증기를 이용해 열교환을 통해 온수를 생산하는 지역난방 열교환기; 상기 증기발생기와 상기 터빈 사이의 증기배관에서 분기되어 있으며 상기 지역난방 열교환기에 증기를 공급하는 주증기 공급부; 및 상기 지역난방 열교환기의 운전을 제어하는 제어부를 포함한다.The present invention relates to a combined heat and power generation system that can be operated even when a turbine generator is overloaded, comprising: a steam generator; a turbine for generating electricity by receiving the steam generated by the steam generator; a district heating heat exchanger for producing hot water through heat exchange using the steam extracted from the turbine; a main steam supply unit branched from the steam pipe between the steam generator and the turbine and supplying steam to the district heating heat exchanger; and a control unit for controlling the operation of the district heating heat exchanger.

Description

터빈 발전기 부하상실시에도 작동가능한 열병합발전시스템{Combined heat and power system operable in case of load loss of turbine generator}Combined heat and power system operable in case of load loss of turbine generator

본 발명은 터빈 발전기 부하상실시에도 작동가능한 열병합발전시스템에 관한 것이다.The present invention relates to a cogeneration system that can be operated even when a turbine generator is loaded.

발전소에서는 고온 고압의 증기를 이용하여 터빈을 회전시켜 발전한다.In a power plant, power is generated by rotating a turbine using high-temperature and high-pressure steam.

터빈을 회전시킨 증기는 응축되어 다시 증기를 생성하는데 사용되는데, 응축과정에서 에너지가 복수기를 통해 외부로 배출되어 버려진다.The steam that rotates the turbine is condensed and used to generate steam again. In the condensing process, energy is discharged to the outside through the condenser and discarded.

에너지 효율을 높이기 위해 터빈을 회전시킨 증기 또는 터빈에서 추기한 증기를 이용하여 지역난방에 활용하는 열병합발전 시스템이 개발되었다.In order to increase energy efficiency, a combined heat and power generation system has been developed that utilizes steam generated by rotating a turbine or steam extracted from the turbine for district heating.

기존의 열병합발전 시스템은 터빈 트립 및 발전기 부하상실의 경우 터빈보호를 위해 터빈 증기차단밸브가 닫히게 되어 있다. 증기차단밸브가 닫히면 터빈에 공급되는 증기가 차단되어 지역난방계통을 운전할 수 없는 문제가 있다.In the existing cogeneration system, the turbine steam shutoff valve is closed to protect the turbine in the event of a turbine trip and generator load loss. When the steam shutoff valve is closed, the steam supplied to the turbine is cut off, so there is a problem that the district heating system cannot be operated.

중국특허공개 제107420878호(2017년 12월 01일 공개)Chinese Patent Laid-Open No. 107420878 (published on December 01, 2017)

따라서 본 발명의 목적은 터빈 발전기 부하상실시에도 작동가능한 열병합발전시스템을 제공하는 것이다.Accordingly, it is an object of the present invention to provide a cogeneration system that can be operated even when a turbine generator is loaded.

상기 본 발명의 목적은 터빈 발전기 부하상실시에도 작동가능한 열병합발전시스템에 있어서, 증기발생기; 상기 증기발생기에서 발생한 증기를 받아 전기를 생산하는 터빈; 상기 터빈에서 추기한 증기를 이용해 열교환을 통해 온수를 생산하는 지역난방 열교환기; 상기 증기발생기와 상기 터빈 사이의 증기배관에서 분기되어 있으며 상기 지역난방 열교환기에 증기를 공급하는 주증기 공급부; 및 상기 지역난방 열교환기의 운전을 제어하는 제어부를 포함하는 것에 의해 달성된다.An object of the present invention is to provide a combined heat and power system that can operate even when a turbine generator is loaded with a load, comprising: a steam generator; a turbine for generating electricity by receiving the steam generated by the steam generator; a district heating heat exchanger for producing hot water through heat exchange using the steam extracted from the turbine; a main steam supply unit branched from the steam pipe between the steam generator and the turbine and supplying steam to the district heating heat exchanger; and a control unit for controlling the operation of the district heating heat exchanger.

상기 증기배관에 설치되어 있는 주증기차단밸브를 더 포함하며, 상기 주증기 공급부는 상기 증기발생기와 상기 주증기차단밸브 사이의 상기 증기배관에서 분기되어 있을 수 있다.Further comprising a main steam shutoff valve installed in the steam pipe, the main steam supply may be branched in the steam pipe between the steam generator and the main steam shutoff valve.

상기 주증기 공급부는, 증기온도조절유닛 및 증기압력조절유닛을 포함하며, 상기 제어부는, 상기 주증기 온도 및 상기 지역난방열교환기에서 배출되는 급수온도 중 적어도 어느 하나에 기초하여 상기 증기온도조절유닛을 운전하며, 상기 지역난방열교환기의 쉘측 압력에 기초하여 상기 증기압력조절유닛을 운전할 수 있다.The main steam supply unit includes a steam temperature control unit and a steam pressure control unit, wherein the control unit controls the steam temperature control unit based on at least one of the main steam temperature and the water supply temperature discharged from the district heating heat exchanger. and the steam pressure control unit may be operated based on the shell-side pressure of the district heating heat exchanger.

상기 증기온도조절부는, 상기 주증기가 통과하며 압력이 강하되는 플래쉬 탱크; 및 상기 주증기에 살수를 통해 상기 주증기의 온도를 조절하는 스프레이를 포함할 수 있다.The steam temperature control unit, a flash tank through which the main steam passes and the pressure is lowered; And it may include a spray for controlling the temperature of the main steam by watering the main steam.

상기 증기압력조절부는 조절밸브를 포함하며, 상기 주증기는 상기 증기온도조절부를 통과한 후 상기 증기압력조절부에 공급될 수 있다.The steam pressure control unit may include a control valve, and the main steam may be supplied to the steam pressure control unit after passing through the steam temperature control unit.

본 발명에 따르면 터빈 발전기 부하상실시에도 작동가능한 열병합발전시스템이 제공된다.According to the present invention, there is provided a cogeneration system that can be operated even when a turbine generator is loaded.

도 1은 본 발명의 일 실시예에 따른 열병합발전 시스템의 구성도를 나타낸 것이고,
도 2는 본 발명의 일 실시예에 따른 열병합발전 시스템에서 플래시 탱크와 스프레이를 나타낸 것이고,
도 3은 본 발명의 일 실시예에 따른 열병합발전 시스템에서 제어부의 작동을 설명하기 위한 도면이다.1 is a block diagram of a cogeneration system according to an embodiment of the present invention;
Figure 2 shows a flash tank and a spray in the cogeneration system according to an embodiment of the present invention,
3 is a view for explaining the operation of the control unit in the cogeneration system according to an embodiment of the present invention.

이하 도면을 참조하여 본 발명을 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the drawings.

첨부된 도면은 본 발명의 기술적 사상을 더욱 구체적으로 설명하기 위하여 도시한 일 예에 불과하므로 본 발명의 사상이 첨부된 도면에 한정되는 것은 아니다. 또한 첨부된 도면은 각 구성요소 간의 관계를 설명하기 위해 크기와 간격 등이 실제와 달리 과장되어 있을 수 있다.Since the accompanying drawings are only an example shown in order to explain the technical idea of the present invention in more detail, the spirit of the present invention is not limited to the accompanying drawings. In addition, in the accompanying drawings, the size and spacing may be exaggerated differently from reality in order to explain the relationship between each component.

도 1 내지 도 3을 참조하여 본 발명의 열병합발전 시스템을 설명한다.A cogeneration system of the present invention will be described with reference to FIGS. 1 to 3 .

도 1은 본 발명의 일 실시예에 따른 열병합발전 시스템의 구성도를 나타낸 것이고, 도 2는 본 발명의 일 실시예에 따른 열병합발전 시스템에서 플래시 탱크와 스프레이를 나타낸 것이고, 도 3은 본 발명의 일 실시예에 따른 열병합발전 시스템에서 제어부의 작동을 설명하기 위한 도면이다.Figure 1 shows the configuration of a cogeneration system according to an embodiment of the present invention, Figure 2 shows a flash tank and a spray in the cogeneration system according to an embodiment of the present invention, Figure 3 is a view of the present invention It is a view for explaining the operation of the control unit in the cogeneration system according to an embodiment.

본 발명에 따른 열병합발전 시스템(1)은 증기발생기(10), 터빈(20), 지역난방 열교환기(30) 및 주증기 공급부(40)를 포함한다. 이외에 열병합발전 시스템(1)은 주증기차단밸브(61) 및 제어부(50)를 더 포함한다.The cogeneration system 1 according to the present invention includes a steam generator 10 , a turbine 20 , a district heating heat exchanger 30 , and a main steam supply unit 40 . In addition, the cogeneration system 1 further includes a main steam shutoff valve 61 and a control unit 50 .

원자로(도시하지 않음)에서 발생한 열을 이용하여 증기발생기(10)에서 증기가 생성된다. 생성된 증기는 터빈(20)에 공급되어 전기를 생산한다. 터빈(20)을 거친 증기는 복수기에서 응축된 후 다시 증기발생기(10)로 공급된다.Steam is generated in the steam generator 10 using the heat generated in the nuclear reactor (not shown). The generated steam is supplied to the turbine 20 to produce electricity. The steam passing through the turbine 20 is condensed in the condenser and then supplied to the steam generator 10 again.

터빈(20)에서 일부 증기가 추기되어 지역난방에 사용된다. 더 자세하게는 일부 추기 증기는 지역난방 열교환기(30)로 공급되어 온수를 생성하는데 사용된 후 복수기로 회수된다.Some steam is extracted from the turbine 20 and used for district heating. In more detail, some of the extraction steam is supplied to the district heating heat exchanger 30, used to generate hot water, and then recovered to the condenser.

주증기 공급부(40)는 다른 방식으로 지역난방 열교환기(30)에 증기를 공급한다. 주증기 공급부(40)는 격리밸브(41, 42), 증기온도조절유닛(43, 45) 및 증기압력조절유닛(44)를 포함한다.The main steam supply unit 40 supplies steam to the district heating heat exchanger 30 in a different way. The main steam supply unit 40 includes isolation valves (41, 42), steam temperature control units (43, 45) and steam pressure control unit (44).

주증기 공급부(40)는 증기발생기(10)와 터빈(20) 사이의 배관에서 분기되어 있으며, 더 자세하게는 증기발생기(10)와 주증기차단밸브(61) 사이의 배관에서 분기되어 있다.The main steam supply unit 40 is branched from the pipe between the steam generator 10 and the turbine 20 , and in more detail is branched from the pipe between the steam generator 10 and the main steam shutoff valve 61 .

주증기 공급부(40)로 공급된 증기는 증기온도조절유닛(43, 45) 및 증기압력조절유닛(44)을 거쳐 지역난방 열교환기(30)에 공급된다.The steam supplied to the main steam supply unit 40 is supplied to the district heating heat exchanger 30 through the steam temperature control units 43 and 45 and the steam pressure control unit 44 .

증기온도조절유닛(43, 45)은 도 2와 같이 플래시 탱크(43)와 스프레이(45)로 구성되어 있다.The steam temperature control units 43 and 45 are composed of a flash tank 43 and a spray 45 as shown in FIG. 2 .

증기온도조절유닛(43, 45)에 공급된 주증기는 플래시 탱크(43)를 거치면서 압력이 저하된다. 스프레이(45)에서는 액상의 물이 분무되어 주증기의 온도를 낮춘다. 도시하지는 않았지만 플래시 탱크(43)의 하부에는 증기의 응축으로 발생한 물을 배출하기 위한 배출라인이 마련될 수 있다.The main steam supplied to the steam temperature control units (43, 45) is reduced in pressure while passing through the flash tank (43). In the spray 45, liquid water is sprayed to lower the temperature of the main steam. Although not shown, a discharge line for discharging water generated by the condensation of steam may be provided at the lower portion of the flash tank 43 .

증기압력조절유닛(44)은 조절밸브로 이루어진다.The steam pressure control unit 44 is composed of a control valve.

도 3을 참조하여 열병합발전시스템(1)의 작동에 대해 설명한다.An operation of the cogeneration system 1 will be described with reference to FIG. 3 .

제어부(50)로 주증기의 온도, 급수 온도 및 증기 압력 등이 입력된다.The main steam temperature, feed water temperature, steam pressure, etc. are input to the control unit 50 .

주증기의 온도는 여러 지점에서 측정할 수 있다. 급수 온도는 지역난방 열교환기(30)에서 배출되는 급수의 온도일 수 있으나, 지역난방에서 원하는 급수온도 등 다양할 수 있다. 증기 압력은, 특히 지역난방 열교환기(30)의 쉘-튜브 구조에서 추기증기가 공급되는 쉘측 압력일 수 있다.The temperature of the main steam can be measured at several points. The feed water temperature may be the temperature of the feed water discharged from the district heating heat exchanger 30, but may vary, such as a desired feed water temperature in the district heating. The steam pressure may be, in particular, a shell-side pressure to which the extractive steam is supplied in the shell-tube structure of the district heating heat exchanger 30 .

도면에서는 온도 및 압력 등을 측정하고 전달하기 위한 구성은 도시를 일부 생략하였다. In the drawings, the configuration for measuring and transmitting temperature and pressure, etc. is partially omitted.

제어부(50)는 입력된 정보를 기초로 주증기 차단밸브(61), 격리밸브(41, 42) 및 주증기 공급부(40) 등을 조절하여 지역난방 열교환기(30)를 운전한다.The control unit 50 operates the district heating heat exchanger 30 by controlling the main steam shutoff valve 61 , the isolation valves 41 and 42 , and the main steam supply unit 40 based on the input information.

예를 들어, 터빈(20)에 부하 트립이 발생한 경우, 주증기 차단밸브(61)를 차단하고 격리밸브(41)를 개방하여 주증기가 주증기 공급부(40)로 공급되도록 한다.For example, when a load trip occurs in the turbine 20 , the main steam shutoff valve 61 is shut off and the isolation valve 41 is opened so that the main steam is supplied to the main steam supply unit 40 .

또한, 스프레이(45)의 스프레이 양과 증기압력조절유닛(44)의 개도 등을 조절하여 지역난방 열교환기(30)에서 배출하는 급수의 온도와 지역난방 열교환기(30)의 압력 등을 조절한다. 한편, 터빈추기 증기보다는 주증기 공급부(40)로 공급되는 증기의 온도가 높기 때문에, 터빈/발전기 트립이 발생하지 않은 경우에도 높은 온도의 증기가 필요한 경우에는 주증기 공급부(40)를 이용하여 지역난방 열교환기(30)에 증기를 공급할 수 있다.In addition, the temperature of the feed water discharged from the district heating heat exchanger 30 and the pressure of the district heating heat exchanger 30 are controlled by controlling the spray amount of the spray 45 and the opening degree of the steam pressure control unit 44 . On the other hand, since the temperature of the steam supplied to the main steam supply unit 40 is higher than that of the turbine extraction steam, when high temperature steam is required even when a turbine/generator trip does not occur, the main steam supply unit 40 is used to local Steam may be supplied to the heating heat exchanger 30 .

이상의 본 발명에 따르면 터빈/발전기 트립 시에도 지역난방계통 공급이 차단되지 않아 안정적인 지역난방 열공급이 가능하다.According to the present invention as described above, even when the turbine/generator trip, the supply of the district heating system is not cut off, so that stable district heating heat supply is possible.

전술한 실시예들은 본 발명을 설명하기 위한 예시로서, 본 발명이 이에 한정되는 것은 아니다. 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이로부터 다양하게 변형하여 본 발명을 실시하는 것이 가능할 것이므로, 본 발명의 기술적 보호범위는 첨부된 특허청구범위에 의해 정해져야 할 것이다.The above-described embodiments are examples for explaining the present invention, and the present invention is not limited thereto. Those of ordinary skill in the art to which the present invention pertains will be able to practice the present invention with various modifications therefrom, so the technical protection scope of the present invention should be defined by the appended claims.

Claims (5)

터빈 발전기 부하상실시에도 작동가능한 열병합발전시스템에 있어서,
증기발생기;
상기 증기발생기에서 발생한 증기를 받아 전기를 생산하는 터빈;
상기 터빈에서 추기한 증기를 이용해 열교환을 통해 온수를 생산하는 지역난방 열교환기;
상기 증기발생기와 상기 터빈 사이의 증기배관에서 분기되어 있으며 상기 지역난방 열교환기에 증기를 공급하는 주증기 공급부; 및
상기 지역난방 열교환기의 운전을 제어하는 제어부를 포함하며,
상기 증기배관에 설치되어 있는 주증기차단밸브를 더 포함하며,
상기 주증기 공급부는 상기 증기발생기와 상기 주증기차단밸브 사이의 상기 증기배관에서 분기되어 있으며,
상기 주증기 공급부는,
증기온도조절유닛 및 증기압력조절유닛을 포함하며,
상기 제어부는,
주증기 온도 및 상기 지역난방열교환기에서 배출되는 급수온도 중 적어도 어느 하나에 기초하여 상기 증기온도조절유닛을 운전하며,
상기 급수온도는 상기 지역난방 열교환기에서 배출되는 급수의 온도이며,
상기 지역난방열교환기의 쉘측 압력에 기초하여 상기 증기압력조절유닛을 운전하며,
상기 증기온도조절유닛는,
상기 주증기가 통과하며 압력이 강하되는 플래쉬 탱크; 및
상기 플래쉬 탱크 내부에 위치하며, 상기 주증기에 살수를 통해 상기 주증기의 온도를 조절하는 스프레이를 포함하며,
상기 증기압력조절유닛은 조절밸브를 포함하며,
상기 주증기는 상기 증기온도조절유닛을 통과한 후 상기 증기압력조절유닛에 공급되며,
상기 주증기 공급부는 격리밸브를 더 포함하며,
상기 제어부는 상기 터빈에 부하 트립이 발생하면 상기 주증기차단밸브 및 상기 격리밸브를 조작하여 상기 증기발생기에서 발생한 증기가 상기 주증기 공급부로 공급되도록 하는 열병합발전 시스템.In the combined heat and power generation system that can be operated even when the load of the turbine generator is lost,
steam generator;
a turbine for generating electricity by receiving the steam generated by the steam generator;
a district heating heat exchanger for producing hot water through heat exchange using the steam extracted from the turbine;
a main steam supply unit branched from a steam pipe between the steam generator and the turbine and supplying steam to the district heating heat exchanger; and
A control unit for controlling the operation of the district heating heat exchanger,
Further comprising a main steam shutoff valve installed in the steam pipe,
The main steam supply unit is branched from the steam pipe between the steam generator and the main steam shut-off valve,
The main steam supply unit,
It includes a steam temperature control unit and a steam pressure control unit,
The control unit is
operating the steam temperature control unit based on at least one of the main steam temperature and the water supply temperature discharged from the district heating heat exchanger,
The water supply temperature is the temperature of the water supply discharged from the district heating heat exchanger,
Operates the steam pressure control unit based on the shell side pressure of the district heating heat exchanger,
The steam temperature control unit,
a flash tank through which the main steam passes and the pressure drops; and
It is located inside the flash tank, and includes a spray for controlling the temperature of the main steam by watering the main steam,
The steam pressure control unit includes a control valve,
The main steam is supplied to the steam pressure control unit after passing through the steam temperature control unit,
The main steam supply unit further includes an isolation valve,
The control unit operates the main steam shutoff valve and the isolation valve when a load trip occurs in the turbine so that the steam generated from the steam generator is supplied to the main steam supply unit. 삭제delete 삭제delete 삭제delete 삭제delete
KR1020190174189A 2019-12-24 2019-12-24 Combined heat and power system operable in case of load loss of turbine generator KR102310444B1 (en)

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KR101343007B1 (en) * 2012-07-02 2013-12-18 (주)우주엔비텍 Combined heat and power plant system
KR101586830B1 (en) * 2014-11-24 2016-01-20 포스코에너지 주식회사 Turbine power sistem equipped with operation means in emergence and the operation method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101343007B1 (en) * 2012-07-02 2013-12-18 (주)우주엔비텍 Combined heat and power plant system
KR101586830B1 (en) * 2014-11-24 2016-01-20 포스코에너지 주식회사 Turbine power sistem equipped with operation means in emergence and the operation method

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