CN217335103U - Flywheel lithium battery hybrid energy storage thermal power frequency modulation system - Google Patents
Flywheel lithium battery hybrid energy storage thermal power frequency modulation system Download PDFInfo
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- CN217335103U CN217335103U CN202220325017.4U CN202220325017U CN217335103U CN 217335103 U CN217335103 U CN 217335103U CN 202220325017 U CN202220325017 U CN 202220325017U CN 217335103 U CN217335103 U CN 217335103U
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Abstract
The utility model provides a pair of flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system, include: the system comprises a first plant power supply unit, a second plant power supply unit, a first flywheel lithium electricity hybrid energy storage power supply unit, a second flywheel lithium electricity hybrid energy storage power supply unit and an isolating switch, wherein the first flywheel lithium electricity hybrid energy storage power supply unit is respectively connected with the first plant power supply unit and the second plant power supply unit; the second flywheel lithium-battery hybrid energy storage power supply unit is respectively connected with the first station service power supply unit and the second station service power supply unit; the first flywheel lithium battery hybrid energy storage power supply unit is connected with the second flywheel lithium battery hybrid energy storage power supply unit through the isolating switch. By constructing the frequency modulation system of the flywheel lithium battery hybrid energy storage auxiliary thermal power generating unit and arranging the isolating switch in the middle of 2 sets of flywheel lithium battery hybrid systems, the hybrid energy storage is respectively used for assisting the frequency modulation of the two units or used as a whole auxiliary single unit for frequency modulation.
Description
Technical Field
The utility model relates to a thermoelectricity frequency modulation technical field, concretely relates to flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system.
Background
Along with the increase of the grid-connected quantity of wind power and photovoltaic power, the rapid development of interconnected large power grids, large-capacity power generation and long-distance power transmission, the frequency modulation task of a power system is heavier.
At present, the Chinese frequency modulation power supply mainly comprises a thermal power generating unit and a hydroelectric generating unit, and the working principle is that the active output of the units is adjusted and the frequency change of the system is tracked. Firstly, the thermal power generating unit and the hydroelectric generating unit generally have the problems of long response time lag, low unit climbing speed and the like, the power grid dispatching instruction cannot be accurately tracked, and the phenomena of regulation time delay, regulation deviation, regulation reversal and the like are exposed; and secondly, the thermal power generating unit and the hydroelectric generating unit frequently change power to operate, so that fatigue and abrasion of the unit equipment are increased to a certain extent, and the operation life of the unit is influenced.
Therefore, at present, it is urgently needed to design a reasonable frequency modulation system to effectively manage the volatility and uncertainty related to high-proportion wind power generation and solar power generation, so as to play the roles of peak regulation and frequency modulation, and further ensure the safe, stable and reliable operation of a power grid system.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming and lacking reasonable frequency modulation system among the prior art, leads to inefficiently managing the volatility and the uncertainty that are relevant with high proportion wind power generation and solar energy power generation and play peak shaver, frequency modulation effect's defect to a flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system is provided.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the embodiment of the utility model provides a flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system, include: the system comprises a first plant power supply unit, a second plant power supply unit, a first flywheel lithium electricity hybrid energy storage power supply unit, a second flywheel lithium electricity hybrid energy storage power supply unit and an isolating switch, wherein the first flywheel lithium electricity hybrid energy storage power supply unit is respectively connected with the first plant power supply unit and the second plant power supply unit; the second flywheel lithium-battery hybrid energy storage power supply unit is respectively connected with the first station-service power supply unit and the second station-service power supply unit; the first flywheel lithium battery hybrid energy storage power supply unit is connected with the second flywheel lithium battery hybrid energy storage power supply unit through the isolating switch.
Optionally, the first flywheel lithium battery hybrid energy storage power supply unit includes a first lithium battery energy storage unit and a first flywheel energy storage unit.
Optionally, the second flywheel lithium battery hybrid energy storage power supply unit includes a second lithium battery energy storage unit and a second flywheel energy storage unit.
Optionally, the first lithium battery energy storage unit includes: a set of lithium cell energy storage step-up changes, A set of lithium cell energy storage circuit-breaker, A set of lithium cell energy storage PCS and A set of lithium cell energy storage device, wherein, A set of lithium cell energy storage device is connected to A set of lithium cell energy storage PCS direct current side, A set of lithium cell energy storage PCS exchanges the side and passes through A set of lithium cell energy storage circuit-breaker is connected to A set of lithium cell energy storage step-up changes the low pressure side.
Optionally, the first flywheel energy storage unit comprises: a set of flywheel energy storage step-up becomes, A set flywheel energy storage grid-connected circuit breaker, A set flywheel energy storage SOP and A set flywheel energy storage device, wherein, A set flywheel energy storage device is connected to A set flywheel energy storage SOP direct current side, A set flywheel energy storage SOP exchanges the side and passes through A set flywheel energy storage grid-connected circuit breaker is connected to A set flywheel energy storage step-up becomes the low pressure side.
Optionally, the second lithium battery energy storage unit includes: b set lithium cell energy storage step-up changes, B set lithium cell energy storage circuit-breaker, B set lithium cell energy storage PCS and B set lithium cell energy storage device, wherein, B set lithium cell energy storage device is connected to B set lithium cell energy storage PCS direct current side, B set lithium cell energy storage PCS exchanges the side and passes through B set lithium cell energy storage circuit-breaker is connected to B set lithium cell energy storage step-up changes the low pressure side.
Optionally, the second flywheel energy storage unit comprises: b set flywheel energy storage step-up becomes, B set flywheel energy storage grid-connected circuit breaker, B set flywheel energy storage SOP and B set flywheel energy storage, wherein, B set flywheel energy storage is connected to B set flywheel energy storage SOP direct current side, B set flywheel energy storage SOP exchanges the side and passes through B set flywheel energy storage grid-connected circuit breaker is connected to B set flywheel energy storage step-up becomes the low pressure side.
The utility model discloses technical scheme has following advantage:
the utility model provides a pair of flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system, include: the system comprises a first plant power supply unit, a second plant power supply unit, a first flywheel lithium electricity hybrid energy storage power supply unit, a second flywheel lithium electricity hybrid energy storage power supply unit and an isolating switch, wherein the first flywheel lithium electricity hybrid energy storage power supply unit is respectively connected with the first plant power supply unit and the second plant power supply unit; the second flywheel lithium battery hybrid energy storage power supply unit is respectively connected with the first station service power supply unit and the second station service power supply unit; the first flywheel lithium battery hybrid energy storage power supply unit is connected with the second flywheel lithium battery hybrid energy storage power supply unit through the isolating switch. By constructing the frequency modulation system of the flywheel lithium battery hybrid energy storage auxiliary thermal power generating unit and arranging the isolating switch in the middle of 2 sets of flywheel lithium battery hybrid systems, the hybrid energy storage is respectively used for assisting the frequency modulation of two units or is used as an integral auxiliary single unit for frequency modulation, so that the peak regulation and frequency modulation effects are realized by managing the fluctuation and uncertainty related to high-proportion wind power generation and solar power generation, and the safe, stable and reliable operation of a power grid system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a specific example of a flywheel lithium-battery hybrid energy storage thermal power frequency modulation system according to an embodiment of the present invention;
fig. 2 is the embodiment of the utility model provides an in the embodiment flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system structure chart.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The embodiment of the utility model provides a flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system, as shown in figure 1, include: the system comprises a first plant power supply unit 11, a second plant power supply unit 12, a first flywheel lithium-ion hybrid energy storage power supply unit 21, a second flywheel lithium-ion hybrid energy storage power supply unit 22 and an isolating switch 3, wherein the first flywheel lithium-ion hybrid energy storage power supply unit 21 is respectively connected with the first plant power supply unit 11 and the second plant power supply unit 12; the second flywheel lithium-ion battery hybrid energy storage power supply unit 22 is respectively connected with the first station service power supply unit 11 and the second station service power supply unit 12; the first flywheel lithium-ion hybrid energy storage power supply unit 21 is connected with the second flywheel lithium-ion hybrid energy storage power supply unit 22 through the isolating switch 3.
In a specific embodiment, the thermal power plant using the frequency modulation system comprises 2 thermal power units. Correspondingly, the thermal power plant comprises 2 sets of plant power supply units, namely a first plant power supply unit 11 and a second plant power supply unit 12.
As shown in fig. 2, the first flywheel lithium-ion hybrid energy storage power supply unit 21 is connected to the first station power supply unit 11 through a 6kV1A bus energy storage grid-connected circuit breaker 1-11; the first flywheel lithium-ion hybrid energy storage power supply unit 21 is connected to the second station power supply unit 12 through 6kV2A bus energy storage grid-connected circuit breakers 1-13. A locking logic is arranged between 1-11 bus energy storage grid-connected circuit breakers of 6kV1A and 1-13 bus energy storage grid-connected circuit breakers of 6kV2A, so that the first flywheel lithium battery hybrid energy storage power supply unit 21 cannot assist the #1 machine and the #2 machine to participate in frequency modulation at the same time.
Further, the second flywheel lithium-ion hybrid energy storage power supply unit 22 is connected to the first plant power supply unit 11 through a 6kV1B section bus energy storage grid-connected circuit breaker 1-12. The second flywheel lithium-ion hybrid energy storage power supply unit 22 is connected to the second plant power supply unit 12 through 6kV2B bus energy storage grid-connected circuit breakers 1-14. And a locking logic is arranged between the 6kV1B bus energy storage grid-connected circuit breakers 1-12 and the 6kV2B bus energy storage grid-connected circuit breakers 1-14, so that the second flywheel lithium-ion hybrid energy storage power supply unit 22 cannot assist the #1 machine and the #2 machine to participate in frequency modulation at the same time.
Further, the first flywheel lithium battery hybrid energy storage power supply unit 21 and the second flywheel lithium battery hybrid energy storage power supply unit 22 are isolated by the isolating switch 3. When 2 sets of energy storage power supply units assist 2 units respectively to carry out frequency modulation, isolator 3 is disconnected, avoids two units of supplementary operation of single set of flywheel lithium battery hybrid system, when needing 2 sets of flywheel lithium battery hybrid system to assist one unit to carry out frequency modulation, closes isolator 3.
Further, the flywheel lithium battery hybrid energy storage can assist the thermal power generating unit to participate in primary frequency modulation and AGC frequency modulation, when the flywheel lithium battery hybrid energy storage participates in the primary frequency modulation, the AGC frequency modulation function is assisted to be locked, in the frequency modulation process, the flywheel energy storage responds to a high-frequency power adjusting instruction, and the lithium battery responds to a medium-frequency power adjusting instruction and a low-frequency power adjusting instruction.
The utility model provides a pair of flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system, include: the system comprises a first plant power supply unit, a second plant power supply unit, a first flywheel lithium electricity hybrid energy storage power supply unit, a second flywheel lithium electricity hybrid energy storage power supply unit and an isolating switch, wherein the first flywheel lithium electricity hybrid energy storage power supply unit is respectively connected with the first plant power supply unit and the second plant power supply unit; the second flywheel lithium-battery hybrid energy storage power supply unit is respectively connected with the first station service power supply unit and the second station service power supply unit; the first flywheel lithium battery hybrid energy storage power supply unit is connected with the second flywheel lithium battery hybrid energy storage power supply unit through an isolating switch. By constructing the frequency modulation system of the flywheel lithium battery hybrid energy storage auxiliary thermal power generating unit and arranging the isolating switch in the middle of 2 sets of flywheel lithium battery hybrid systems, the hybrid energy storage is respectively used for assisting the frequency modulation of two units or is used as an integral auxiliary single unit for frequency modulation, so that the peak regulation and frequency modulation effects are realized by managing the fluctuation and uncertainty related to high-proportion wind power generation and solar power generation, and the safe, stable and reliable operation of a power grid system is ensured.
In an embodiment, as shown in fig. 2, the first plant power supply unit 11 includes #1 machine split winding high station transformer 1-1, #1 machine high station transformer a branch circuit breaker 1-3, #1 machine high station transformer B branch circuit breaker 1-4, #1 machine 6kV1A bus bars 1-7, #1 machine 6kV1B bus bars 1-8, 6kV1A bus bar energy storage grid-connected circuit breaker 1-11, and 6kV1B bus bar energy storage grid-connected circuit breaker 1-12.
In a specific embodiment, the high-voltage side of the #1 machine split winding high-voltage transformer is connected to the outlet of the generator, the low-voltage side of the #1 machine split winding high-voltage transformer is connected with a segment 1-7 of a #1 machine 6kV1A bus through a #1 machine high-voltage transformer A branch breaker 1-3, and the low-voltage side of the #1 machine split winding high-voltage transformer 1-1 is connected with a segment 1-8 of a #1 machine 6kV1B bus through a #1 machine high-voltage transformer B branch breaker 1-4. The lower port of a bus 1-7 at the 6kV1A section of the #1 machine is connected with a first flywheel lithium battery hybrid energy storage power supply unit 21 through a bus energy storage grid-connected circuit breaker 1-11 at the 6kV1A section; and the lower port of the #1 machine 6kV1B section bus 1-8 is connected with a second flywheel lithium battery hybrid energy storage power supply unit 22 through the 6kV1B section bus energy storage grid-connected circuit breaker 1-12.
In an embodiment, as shown in fig. 2, the second plant power supply unit 12 includes #2 machine split winding high-voltage substation 1-2, #2 machine high-voltage substation a branch circuit breaker 1-5, #2 machine high-voltage substation B branch circuit breaker 1-6, #2 machine 6kV2A bus bar 1-9, #2 machine 6kV2B bus bar 1-10, 6kV2A bus bar energy storage grid-connected circuit breaker 1-13, and 6kV2B bus bar energy storage grid-connected circuit breaker 1-14.
In a specific embodiment, the high-voltage side of the #2 machine split winding high-voltage transformer is connected to the outlet of the generator, the low-voltage side of the #2 machine split winding high-voltage transformer is connected with the section 1-9 of the #2 machine 6kV2A bus through the #2 machine high-voltage transformer A branch breaker 1-5, and the low-voltage side of the #2 machine split winding high-voltage transformer 1-2 is connected with the section 1-10 of the #2 machine 6kV2B bus through the #2 machine high-voltage transformer B branch breaker 1-6. The lower port of a 6kV2A section bus 1-9 of the #2 machine is connected with a first flywheel lithium battery hybrid energy storage power supply unit 21 through a 6kV2A section bus energy storage grid-connected circuit breaker 1-13; and the lower port of the #2 machine 6kV2B section bus 1-10 is connected with a second flywheel lithium battery hybrid energy storage power supply unit 22 through a 6kV2B section bus energy storage grid-connected circuit breaker 1-14.
In an embodiment, as shown in fig. 2, the first flywheel lithium battery hybrid energy storage power supply unit 21 includes a first lithium battery energy storage unit 211 and a first flywheel energy storage unit 212.
In one embodiment, as shown in fig. 2, the first lithium battery energy storage unit 211 includes: the energy storage and voltage boosting circuit comprises a set A of lithium battery energy storage and voltage boosting transformer 2-1, a set A of lithium battery energy storage grid-connected circuit breaker 2-2, a set A of lithium battery energy storage PCS (Power Conversion System)2-3 and a set A of lithium battery energy storage device 2-4, wherein the set A of lithium battery energy storage device 2-4 is connected to the direct current side of the set A of lithium battery energy storage PCS2-3, and the alternating current side of the set A of lithium battery energy storage PCS2-3 is connected to the low voltage side of the set A of lithium battery energy storage and voltage boosting transformer 2-1 through the set A of lithium battery energy storage grid-connected circuit breaker 2-2.
Further, the first flywheel energy storage unit 212 includes: the energy storage and boosting system comprises a set of flywheel energy storage boosting transformer A2-5, a set of flywheel energy storage grid-connected circuit breaker A2-6, a set of flywheel energy storage SOP (soft open point) A2-7 and a set of flywheel energy storage device A2-8, wherein the set of flywheel energy storage device A2-8 is connected to the direct current side of the set of flywheel energy storage SOP2-7, and the alternating current side of the set of flywheel energy storage SOP2-7 is connected to the low voltage side of the set of flywheel energy storage boosting transformer A2-5 through the set of flywheel energy storage grid-connected circuit breaker A2-6.
In one embodiment, the second flywheel lithium battery hybrid energy storage power supply unit 22 includes a second lithium battery energy storage unit 221 and a second flywheel energy storage unit 222.
In an embodiment, as shown in fig. 2, the second lithium battery energy storage unit 221 includes: the energy storage and voltage boosting circuit comprises 2-10 parts of B sets of lithium batteries, 2-11 parts of B sets of lithium battery energy storage grid-connected circuit breakers, 2-12 parts of B sets of lithium battery energy storage PCS2-12 parts of B sets of lithium batteries and 2-13 parts of B sets of lithium battery energy storage devices, wherein the 2-13 parts of the B sets of lithium battery energy storage devices are connected to the direct current side of the PCS2-12 parts of the B sets of lithium battery energy storage PCS2-12 parts of alternating current side of the B sets of lithium battery energy storage grid-connected circuit breakers are connected to the 2-10 low voltage side of the B sets of lithium battery energy storage and voltage boosting circuit breakers through the 2-11 parts of the B sets of lithium battery energy storage grid-connected circuit breakers.
Further, the second flywheel energy storage unit 222 includes: the energy storage and boosting system comprises a set B of flywheel energy storage boosting transformer 2-14, a set B of flywheel energy storage grid-connected circuit breaker 2-15, a set B of flywheel energy storage SOP2-16 and a set B of flywheel energy storage device 2-17, wherein the set B of flywheel energy storage device 2-17 is connected to the direct current side of the set B of flywheel energy storage SOP2-16, and the alternating current side of the set B of flywheel energy storage SOP2-16 is connected to the low voltage side of the set B of flywheel energy storage boosting transformer 2-14 through the set B of flywheel energy storage grid-connected circuit breaker 2-15.
In the embodiment of the utility model, set A flywheel energy storage SOP2-7 and set B flywheel energy storage SOP2-12 all adopt back-to-back voltage source full-control type power electronic device, and the transverter all has four-quadrant power control ability, and power response time is at the millisecond level. The characteristic that the power response time of the set A of flywheel energy storage SOP2-7 and the set B of flywheel energy storage SOP2-12 is in millisecond level is applied, charging/discharging is carried out rapidly, and the capability of the set A of flywheel energy storage devices 2-8 and the set B of flywheel energy storage devices 2-17 in responding to high-frequency power regulation instructions is improved.
Furthermore, the high-power high-frequency IGBT component can realize unit power factor operation or operation according to the real-time power regulation requirement of the electric load and the given power factor by adopting the energy storage PCS2-3 of the lithium batteries A, the energy storage PCS2-12 of the lithium batteries B, the energy storage SOP2-7 of the flywheel A and the energy storage SOP2-12 of the flywheel B. The maximum short-circuit current which can be provided by the high-power high-frequency IGBT component is not more than 1.5 times of the rated current, and the protection judgment logic is simple and efficient.
In an embodiment, the first flywheel lithium battery hybrid energy storage power supply unit 21 and the second flywheel lithium battery hybrid energy storage power supply unit 22 may assist the #1 unit and the #2 unit to participate in the primary frequency modulation and the AGC frequency modulation, respectively, or may assist the #1 unit or the #2 unit to participate in the primary frequency modulation and the AGC frequency modulation as a whole. When the energy storage device participates in primary frequency modulation, the auxiliary AGC frequency modulation function is locked, in the frequency modulation process, the flywheel energy storage devices 2-8 and the flywheel energy storage devices 2-17 in the set A respond to a high-frequency power adjustment instruction, and the lithium battery energy storage devices 2-4 and the lithium battery energy storage devices 2-13 in the set B respond to a medium-frequency and low-frequency power adjustment instruction.
In an embodiment, the first flywheel lithium battery hybrid energy storage power supply unit 21 and the second flywheel lithium battery hybrid energy storage power supply unit 22 assist the #1 machine to perform frequency modulation, which can be divided into 3 types: 1) and (3) disconnecting the disconnecting switch 3, closing 1-11 of the 6kV1A bus energy storage grid-connected circuit breaker, wherein 1-13 of the 6kV2A bus energy storage grid-connected circuit breaker is in a closed state, closing 1-12 of the 6kV1B bus energy storage grid-connected circuit breaker, and 1-14 of the 6kV2B bus energy storage grid-connected circuit breaker is in a closed state. 2) Closing an isolating switch 3, closing 1-11 of a 6kV1A section bus energy storage grid-connected circuit breaker, and disconnecting 1-12 of a 6kV1B section bus energy storage grid-connected circuit breaker, wherein at the moment, a first flywheel lithium battery hybrid energy storage power supply unit 21 and a second flywheel lithium battery hybrid energy storage power supply unit 22 are all connected to 1 #1 machine 6kV1A section bus 1-7; 3) and (3) closing the isolating switch 3, closing 1-12 bus energy storage grid-connected circuit breakers of 6kV1B sections, and disconnecting 1-11 bus energy storage grid-connected circuit breakers of 6kV1A sections, wherein at the moment, the first flywheel lithium battery hybrid energy storage power supply unit 21 and the second flywheel lithium battery hybrid energy storage power supply unit 22 are all connected to 1 #1 machine 6kV1B section buses 1-8.
In an embodiment, the first flywheel lithium battery hybrid energy storage power supply unit 21 and the second flywheel lithium battery hybrid energy storage power supply unit 22 assist the #2 machine to perform frequency modulation, which may be divided into 3 types: 1) and (3) disconnecting the disconnecting switch 3, closing 1-13 of the 6kV2A bus energy storage grid-connected circuit breaker, closing 1-11 of the 6kV1A bus energy storage grid-connected circuit breaker in a closed state, closing 1-14 of the 6kV2B bus energy storage grid-connected circuit breaker, and closing 1-12 of the 6kV1B bus energy storage grid-connected circuit breaker in a closed state. 2) Closing an isolating switch 3, closing 1-13 bus energy storage grid-connected circuit breakers of 6kV2A sections, and disconnecting 1-14 bus energy storage grid-connected circuit breakers of 6kV2B sections, wherein at the moment, a first flywheel lithium battery hybrid energy storage power supply unit 21 and a second flywheel lithium battery hybrid energy storage power supply unit 22 are all connected to 1-9 buses of #2 machine 6kV2A sections; 3) and (3) closing the isolating switch 3, closing 1-14 of the 6kV2B bus energy storage grid-connected circuit breaker, and disconnecting 1-13 of the 6kV2A bus energy storage grid-connected circuit breaker, wherein at the moment, the first flywheel lithium battery hybrid energy storage power supply unit 21 and the second flywheel lithium battery hybrid energy storage power supply unit 22 are all connected to 1-10 of the #2 machine 6kV2B bus.
In an embodiment, the first flywheel lithium battery hybrid energy storage power supply unit 21 assists the #1 machine to perform frequency modulation, the second flywheel lithium battery hybrid energy storage power supply unit 22 assists the #2 machine to perform frequency modulation, the isolating switch 3 is opened at the moment, the 6kV1A bus energy storage grid-connected circuit breaker 1-11 is closed, the 6kV2A bus energy storage grid-connected circuit breaker 1-13 is in a closed state and is in an open state, and the first flywheel lithium battery hybrid energy storage power supply unit 21 is connected to the #1 machine 6kV1A bus 1-7. And closing the 6kV2B bus energy storage grid-connected circuit breakers 1-14, wherein the 6kV1B bus energy storage grid-connected circuit breakers 1-12 are in a closed state and are in an off state, and the second flywheel lithium battery hybrid energy storage power supply unit 22 is connected to the #2 machine 6kV2B bus 1-10.
In an embodiment, the first flywheel lithium battery hybrid energy storage power supply unit 21 assists the #2 machine in frequency modulation, the second flywheel lithium battery hybrid energy storage power supply unit 22 assists the #1 machine in frequency modulation, the isolating switch 3 is opened at the moment, the 6kV2A bus energy storage grid-connected circuit breaker 1-13 is closed, the 6kV1A bus energy storage grid-connected circuit breaker 1-11 is in a closed state and is in an open state, and the first flywheel lithium battery hybrid energy storage power supply unit 21 is connected to the #2 machine 6kV2A bus 1-9. And closing 1-12 bus energy storage grid-connected circuit breakers of 6kV1B sections, wherein 1-14 bus energy storage grid-connected circuit breakers of 6kV2B sections are in a closed state and in a disconnected state, and the second flywheel lithium battery hybrid energy storage power supply unit 22 is connected to 1-8 buses of 6kV1B of the #1 machine.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (7)
1. The utility model provides a flywheel lithium electricity hybrid energy storage thermoelectricity frequency modulation system which characterized in that includes: a first factory power supply unit, a second factory power supply unit, a first flywheel lithium battery hybrid energy storage power supply unit, a second flywheel lithium battery hybrid energy storage power supply unit and an isolating switch, wherein,
the first flywheel lithium-battery hybrid energy storage power supply unit is respectively connected with the first station-service power supply unit and the second station-service power supply unit;
the second flywheel lithium-battery hybrid energy storage power supply unit is respectively connected with the first station-service power supply unit and the second station-service power supply unit;
the first flywheel lithium battery hybrid energy storage power supply unit is connected with the second flywheel lithium battery hybrid energy storage power supply unit through the isolating switch.
2. The flywheel lithium-battery hybrid energy-storage thermal power frequency modulation system according to claim 1, wherein the first flywheel lithium-battery hybrid energy-storage power supply unit comprises a first lithium-battery energy storage unit and a first flywheel energy storage unit.
3. The flywheel lithium-ion hybrid energy storage thermal power frequency modulation system according to claim 1, wherein the second flywheel lithium-ion hybrid energy storage power supply unit comprises a second lithium-ion battery energy storage unit and a second flywheel energy storage unit.
4. The flywheel lithium battery hybrid energy storage thermal power frequency modulation system according to claim 2, wherein the first lithium battery energy storage unit comprises: a set of lithium battery energy storage step-up transformer, A set of lithium battery energy storage grid-connected circuit breaker, A set of lithium battery energy storage PCS and A set of lithium battery energy storage device, wherein,
a set of lithium cell energy memory is connected to A set of lithium cell energy storage PCS direct current side, A set of lithium cell energy storage PCS exchanges the side and passes through A set of lithium cell energy storage grid-connected circuit breaker is connected to A set of lithium cell energy storage step-up becomes the low pressure side.
5. The flywheel lithium-ion hybrid energy storage thermal frequency modulation system according to claim 2, wherein the first flywheel energy storage unit comprises: a set of flywheel energy storage step-up transformer, A set of flywheel energy storage grid-connected circuit breaker, A set of flywheel energy storage SOP and A set of flywheel energy storage device,
a set of flywheel energy storage device is connected to A set of flywheel energy storage SOP direct current side, A set of flywheel energy storage SOP exchanges the side and passes through A set of flywheel energy storage grid-connected circuit breaker is connected to A set of flywheel energy storage step-up becomes the low pressure side.
6. The flywheel lithium battery hybrid energy storage thermal power frequency modulation system of claim 3, wherein the second lithium battery energy storage unit comprises: b sets of lithium battery energy storage boosting transformer, B sets of lithium battery energy storage grid-connected circuit breaker, B sets of lithium battery energy storage PCS and B sets of lithium battery energy storage device, wherein,
b set lithium cell energy memory is connected to B set lithium cell energy storage PCS direct current side, B set lithium cell energy storage PCS exchanges the side and passes through B set lithium cell energy storage grid-connected circuit breaker is connected to B set lithium cell energy boosting changes the low pressure side.
7. The flywheel lithium-ion hybrid energy storage thermal frequency modulation system according to claim 3, wherein the second flywheel energy storage unit comprises: b sets of flywheel energy storage boosting transformer, B sets of flywheel energy storage grid-connected circuit breaker, B sets of flywheel energy storage SOP and B sets of flywheel energy storage device, wherein,
b set flywheel energy storage device is connected to B set flywheel energy storage SOP direct current side, B set flywheel energy storage SOP exchanges the side and passes through B set flywheel energy storage grid-connected circuit breaker is connected to B set flywheel energy storage step-up becomes the low pressure side.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220325017.4U CN217335103U (en) | 2022-02-17 | 2022-02-17 | Flywheel lithium battery hybrid energy storage thermal power frequency modulation system |
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