Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis

The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by sta...
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Autor*in:	Hu, Jinhong [verfasserIn] Yang, Jiebin [verfasserIn] Zeng, Wei [verfasserIn] Zhao, Zhigao [verfasserIn] Yang, Jiandong [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments

Übergeordnetes Werk:	Enthalten in: Renewable energy - Amsterdam [u.a.] : Elsevier Science, 1991, 176, Seite 269-279
Übergeordnetes Werk:	volume:176 ; pages:269-279

DOI / URN:	10.1016/j.renene.2021.05.081

Katalog-ID:	ELV006173020

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245	1	0	\|a Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis
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520			\|a The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically.
650		4	\|a Pumped storage
650		4	\|a Pump-turbine
650		4	\|a S-shaped characteristics
650		4	\|a Hydraulic interaction
650		4	\|a Model experiments
700	1		\|a Yang, Jiebin \|e verfasserin \|4 aut
700	1		\|a Zeng, Wei \|e verfasserin \|4 aut
700	1		\|a Zhao, Zhigao \|e verfasserin \|4 aut
700	1		\|a Yang, Jiandong \|e verfasserin \|4 aut
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936	b	k	\|a 52.56 \|j Regenerative Energieformen \|j alternative Energieformen
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allfields	10.1016/j.renene.2021.05.081 doi (DE-627)ELV006173020 (ELSEVIER)S0960-1481(21)00763-1 DE-627 ger DE-627 rda eng 530 620 DE-600 52.56 bkl Hu, Jinhong verfasserin aut Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically. Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments Yang, Jiebin verfasserin aut Zeng, Wei verfasserin aut Zhao, Zhigao verfasserin aut Yang, Jiandong verfasserin aut Enthalten in Renewable energy Amsterdam [u.a.] : Elsevier Science, 1991 176, Seite 269-279 Online-Ressource (DE-627)320412091 (DE-600)2001449-1 (DE-576)252613937 1879-0682 nnns volume:176 pages:269-279 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.56 Regenerative Energieformen alternative Energieformen AR 176 269-279
spelling	10.1016/j.renene.2021.05.081 doi (DE-627)ELV006173020 (ELSEVIER)S0960-1481(21)00763-1 DE-627 ger DE-627 rda eng 530 620 DE-600 52.56 bkl Hu, Jinhong verfasserin aut Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically. Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments Yang, Jiebin verfasserin aut Zeng, Wei verfasserin aut Zhao, Zhigao verfasserin aut Yang, Jiandong verfasserin aut Enthalten in Renewable energy Amsterdam [u.a.] : Elsevier Science, 1991 176, Seite 269-279 Online-Ressource (DE-627)320412091 (DE-600)2001449-1 (DE-576)252613937 1879-0682 nnns volume:176 pages:269-279 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.56 Regenerative Energieformen alternative Energieformen AR 176 269-279
allfields_unstemmed	10.1016/j.renene.2021.05.081 doi (DE-627)ELV006173020 (ELSEVIER)S0960-1481(21)00763-1 DE-627 ger DE-627 rda eng 530 620 DE-600 52.56 bkl Hu, Jinhong verfasserin aut Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically. Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments Yang, Jiebin verfasserin aut Zeng, Wei verfasserin aut Zhao, Zhigao verfasserin aut Yang, Jiandong verfasserin aut Enthalten in Renewable energy Amsterdam [u.a.] : Elsevier Science, 1991 176, Seite 269-279 Online-Ressource (DE-627)320412091 (DE-600)2001449-1 (DE-576)252613937 1879-0682 nnns volume:176 pages:269-279 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.56 Regenerative Energieformen alternative Energieformen AR 176 269-279
allfieldsGer	10.1016/j.renene.2021.05.081 doi (DE-627)ELV006173020 (ELSEVIER)S0960-1481(21)00763-1 DE-627 ger DE-627 rda eng 530 620 DE-600 52.56 bkl Hu, Jinhong verfasserin aut Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically. Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments Yang, Jiebin verfasserin aut Zeng, Wei verfasserin aut Zhao, Zhigao verfasserin aut Yang, Jiandong verfasserin aut Enthalten in Renewable energy Amsterdam [u.a.] : Elsevier Science, 1991 176, Seite 269-279 Online-Ressource (DE-627)320412091 (DE-600)2001449-1 (DE-576)252613937 1879-0682 nnns volume:176 pages:269-279 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.56 Regenerative Energieformen alternative Energieformen AR 176 269-279
allfieldsSound	10.1016/j.renene.2021.05.081 doi (DE-627)ELV006173020 (ELSEVIER)S0960-1481(21)00763-1 DE-627 ger DE-627 rda eng 530 620 DE-600 52.56 bkl Hu, Jinhong verfasserin aut Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically. Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments Yang, Jiebin verfasserin aut Zeng, Wei verfasserin aut Zhao, Zhigao verfasserin aut Yang, Jiandong verfasserin aut Enthalten in Renewable energy Amsterdam [u.a.] : Elsevier Science, 1991 176, Seite 269-279 Online-Ressource (DE-627)320412091 (DE-600)2001449-1 (DE-576)252613937 1879-0682 nnns volume:176 pages:269-279 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 52.56 Regenerative Energieformen alternative Energieformen AR 176 269-279
language	English
source	Enthalten in Renewable energy 176, Seite 269-279 volume:176 pages:269-279
sourceStr	Enthalten in Renewable energy 176, Seite 269-279 volume:176 pages:269-279
format_phy_str_mv	Article
bklname	Regenerative Energieformen alternative Energieformen
institution	findex.gbv.de
topic_facet	Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments
dewey-raw	530
isfreeaccess_bool	false
container_title	Renewable energy
authorswithroles_txt_mv	Hu, Jinhong @@aut@@ Yang, Jiebin @@aut@@ Zeng, Wei @@aut@@ Zhao, Zhigao @@aut@@ Yang, Jiandong @@aut@@
publishDateDaySort_date	2021-01-01T00:00:00Z
hierarchy_top_id	320412091
dewey-sort	3530
id	ELV006173020
language_de	englisch
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author	Hu, Jinhong
spellingShingle	Hu, Jinhong ddc 530 bkl 52.56 misc Pumped storage misc Pump-turbine misc S-shaped characteristics misc Hydraulic interaction misc Model experiments Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis
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topic_title	530 620 DE-600 52.56 bkl Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis Pumped storage Pump-turbine S-shaped characteristics Hydraulic interaction Model experiments
topic	ddc 530 bkl 52.56 misc Pumped storage misc Pump-turbine misc S-shaped characteristics misc Hydraulic interaction misc Model experiments
topic_unstemmed	ddc 530 bkl 52.56 misc Pumped storage misc Pump-turbine misc S-shaped characteristics misc Hydraulic interaction misc Model experiments
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title	Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis
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title_full	Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis
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title_sort	hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: measurement, simulation, and sensitivity analysis
title_auth	Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis
abstract	The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically.
abstractGer	The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically.
abstract_unstemmed	The S-shaped characteristic of a pump-turbine poses a latent risk to problems such as failure to start the unit, excessive water hammer pressure after load rejection, severe pressure pulsation, and intense vibration. However, S-shaped characteristics of a pump-turbine are usually investigated by static model tests, while the scope of this method is relatively limited. In a previous study exploring the S-shaped characteristic curve of pump-turbines, the constant-speed oscillation (CSO) was experimentally discovered. This transient process can be utilized to acquire the dynamic trajectory of the unit at a fixed rotational speed in the turbine mode, turbine brake mode, and reverse pump mode. On this basis, this study investigated the hydraulic oscillations between two pump-turbines after the net flow of the system was reduced to zero when the two units were operated in parallel. It was found that the two pump-turbines had an equal oscillation cycle, but their transient trajectories were significantly different. One of the runners oscillated only in the reverse pump mode, whereas the other runner oscillated in the turbine, turbine brake, and reverse pump modes. This process was termed the CSO interaction (CSOI). Subsequently, a one-dimensional rigid column simulation and a sensitivity analysis were performed to analyze the CSOI further, thereby verifying that the S-shaped characteristic curve was the root cause of the oscillation period and amplitude variation of the unit in the CSOI. The runner with the more prominent S-shaped characteristic curve tends to operate in the reverse pump mode during oscillation. The novelty of the work is that a new hydraulic interaction between pump-turbines, CSOI, was discovered. CSOI provides a metric for comparing the intensities of the S-shaped characteristic curves of two pump-turbines experimentally or theoretically.
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title_short	Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis
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author2	Yang, Jiebin Zeng, Wei Zhao, Zhigao Yang, Jiandong
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up_date	2024-07-06T20:28:21.609Z
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Hydraulic interaction of two parallel pump-turbines in constant-speed oscillation: Measurement, simulation, and sensitivity analysis

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