CN218415828U - Black start system of wind-solar-fire storage combined operation system - Google Patents
Black start system of wind-solar-fire storage combined operation system Download PDFInfo
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- CN218415828U CN218415828U CN202221495544.6U CN202221495544U CN218415828U CN 218415828 U CN218415828 U CN 218415828U CN 202221495544 U CN202221495544 U CN 202221495544U CN 218415828 U CN218415828 U CN 218415828U
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Abstract
The utility model discloses a black start-up system of scene storage fire combined operation system, include: the system comprises a new energy alternating current micro-grid, a power transmission unit, a load unit and a thermal power generation unit; the new energy alternating current micro-grid is connected with the thermal power generation unit through the power transmission unit and connected with the load unit, and comprises a photovoltaic unit, a wind power unit and an energy storage unit; the black start method of the wind-solar-fire storage combined operation system is characterized in that rated values of voltage amplitude and frequency of an alternating-current bus are set as reference values, and closing of a grid-connected switch is controlled according to whether the voltage amplitude and the frequency of the output side of the new-energy alternating-current micro-grid reach the reference values or not.
Description
Technical Field
The utility model belongs to the technical field of the black start-up technique of scene storage fire and specifically relates to a scene stores up black start-up system of fire joint operation system.
Background
The 'black start' refers to that after the whole power grid system is stopped due to a fault, the system is completely powered off (isolated small power grids are not excluded to still maintain running), is in a full 'black' state, is not dependent on other network help, and is started through a generator set with self-starting capability in the system to drive the generator set without the self-starting capability, so that the system recovery range is gradually enlarged, and finally the recovery of the whole system is realized. The different power systems recover in different ways, but the general goal is to enable the system to recover the loaded capacity in a minimum amount of time.
With the continuous improvement of the permeability of new energy power generation, the grid structure of a power system becomes more complex, and the matching of energy storage equipment with a corresponding scale in a new energy station becomes an industry consensus. The large-scale energy storage technology is one of key technologies for energy revolution, and can provide various services such as peak shaving, frequency modulation and emergency response for a power grid, so that the development is rapid in recent years. The 'black start' is used as one of the auxiliary services of the emergency response of the power grid, and can assist the power failure area to recover power supply quickly and reduce economic loss. And starting auxiliary equipment of the thermal power plant on the opposite side of the power transmission line through the energy storage equipment of the new energy station, so that the thermal power generating unit recovers operation, the recovery range of the power system is gradually expanded, and the recovery of the whole power system is finally realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a black start-up system of scene storage fire combined operation system solves new forms of energy station and can not in time resume the power supply after breaking down and having a power failure, and no power point starts new forms of energy power generation system, influences the operation of thermal power generating unit, causes economic loss's problem, and black start-up system includes that new forms of energy exchanges little electric wire netting, transmission of electricity unit, load cell and thermal power generation unit.
The new energy alternating current micro-grid is connected with the thermal power generation unit through the power transmission unit, the new energy alternating current micro-grid is connected with the load unit, and the new energy alternating current micro-grid comprises a photovoltaic unit, a wind power unit and an energy storage unit.
In some embodiments of the present application, the photovoltaic unit is modified such that the photovoltaic unit is connected to the grid for power generation and easy to control, the photovoltaic unit comprises a photovoltaic panel, a photovoltaic DC/AC inverter, a photovoltaic step-up transformer and a photovoltaic grid-connected switch K 1 ；
The photovoltaic panel, the photovoltaic DC/AC inverter, the photovoltaic boost transformer and the photovoltaic grid-connected switch K 1 In turn, serially connected to the ac bus.
In some embodiments of the present application, the wind power unit is improved so that the wind power unit automatically captures wind energy for power generation, and the wind power unit includes a wind turbine generator, a back-to-back converter, a wind power step-up transformer and a wind power grid-connected switch K 2 ；
The wind turbine generator set, the back-to-back converter device, the wind power boosting transformer and the wind power grid-connected switch K 2 And the back-to-back converter devices comprise a wind power AC/DC rectifying device and a wind power DC/AC inverter.
In some embodiments of the present application, the energy storage unit is modified so that the energy storage unit is convenient for storing electric quantity and supplying power to the alternating current bus, and the energy storage unit comprises an energy storage battery, an energy storage DC/AC inverter device and an energy storage boost transformer; the energy storage battery, the energy storage DC/AC inverter and the energy storage boosting transformer are sequentially connected to the alternating current bus in series.
In some embodiments of the present application, the power transmission unit is modified so that the power transmission unit controls the voltage in time, so as to connect the new energy ac micro grid with the thermal power generation unit, the power transmission unit includes a first transformer, a power transmission line and a second transformer, the first transformer passes through the ac bus and is connected with the new energy ac micro grid, and the second transformer passes through the ac bus and is connected with the thermal power generation unit.
In some embodiments of the application, the load unit is improved, so that the load unit can adjust the voltage in time, the load unit comprises a load voltage reduction transformer and a load, and the load is connected with the new energy alternating current micro-grid through the load voltage reduction transformer.
In some embodiments of this application, improved thermal power unit, so that thermal power unit can nimble control access electric wire netting, and is convenient for control thermal power unit and auxiliary engine in the thermal power unit in time start, thermal power unit includes thermal power unit, auxiliary engine, thermal power boost change, start to be changed, thermal power unit grid-connected switch K 3 Auxiliary machine grid-connected switch K 4 ；
The thermal power unit is connected with the thermal power grid-connected switch K through the thermal power boost voltage change 3 Connected with the power grid, the auxiliary machine is connected with the auxiliary machine grid-connected switch K through the starting transformer 4 The thermal power generating unit is connected with the auxiliary machine;
the thermal power generation unit is connected with the new energy alternating current micro-grid through the second transformer, the power transmission line and the first transformer.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a black start system of a wind-light-fire-storage combined operation system in an embodiment of the present invention;
fig. 2 is a flowchart of a black start method of a wind, light and fire storage combined operation system in an embodiment of the present invention.
Reference numerals
1. A photovoltaic unit; 2. a wind power unit; 3. an energy storage unit; 4. a power transmission unit; 5. a load cell; 6. a thermal power generation unit; 11. a photovoltaic panel; 12. a photovoltaic DC/AC inverter device; 13. photovoltaic step-up transformer; 14. photovoltaic grid-connected switch K 1 (ii) a 21. A wind turbine generator; 22. a wind power AC/DC rectifying device; 23. a wind power DC/AC inverter device; 24. wind power boosting and changing; 25. wind power grid-connected switch K 2 (ii) a 31. An energy storage battery; 32. an energy storage DC/AC inverter device; 33. energy storage boosting transformation; 41. a first transformer; 42. a power transmission line; 43. a second transformer; 51. reducing the voltage of the load; 52. a load; 61. a thermal power generating unit; 62. an auxiliary machine; 63. thermal power voltage boosting and changing; 64. starting a standby; 65. grid-connected switch K of thermal power generating unit 3 (ii) a 66. Auxiliary machine grid-connected switch K 4 。
Detailed Description
The technical solution of the present invention is further explained by the accompanying drawings and examples.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The 'black start' means that after the whole power grid system is stopped due to a fault, the system is completely powered off (isolated small power grids are not excluded to still maintain operation), is in a full 'black' state, is not dependent on other network help, and is started by a generator set with self-starting capability in the system to drive the generator set without the self-starting capability, so that the system recovery range is gradually expanded, and finally the recovery of the whole system is realized. The different power systems recover in different ways, but the general goal is to enable the system to recover the loaded capacity in a minimum amount of time.
With the continuous improvement of the power generation permeability of new energy, the grid structure of a power system becomes more complex, and the matching of energy storage equipment with corresponding scale in a new energy station becomes an industry consensus. The large-scale energy storage technology is one of key energy revolution technologies, and can provide various services such as peak shaving, frequency modulation and emergency response for a power grid, so that the development is rapid in recent years. The 'black start' is used as one of the power grid emergency response auxiliary services, and can assist the power failure area to quickly recover power supply and reduce economic loss. And starting auxiliary equipment of the thermal power plant on the opposite side of the power transmission line through the energy storage equipment of the new energy station, so that the thermal power generating unit recovers operation, the recovery range of the power system is gradually expanded, and the recovery of the whole power system is finally realized.
As shown in fig. 1, the utility model provides a black start-up system of scene storage fire combined operation system has solved new forms of energy station and has failed and can not in time resume the power supply after having a power failure, and no power point starts new forms of energy power generation system, influences the operation of thermal power generating unit, causes economic loss's problem, and black start-up system includes new forms of energy alternating current microgrid, transmission of electricity unit 4, load cell 5 and thermal power generation unit 6.
The new energy alternating current micro-grid is connected with the thermal power generation unit 6 through the power transmission unit 4, and is connected with the load unit 5, wherein the new energy alternating current micro-grid comprises a photovoltaic unit 1, a wind power unit 2 and an energy storage unit 3.
In some embodiments of the present application, the photovoltaic unit 1 comprises a photovoltaic panel 11, a photovoltaic DC/AC inverter device 12, a photovoltaic step-up transformer 13 and a photovoltaic grid-connected switch K 1 14；
The photovoltaic panel 11, the photovoltaic DC/AC inverter 12, the photovoltaic boost transformer 13 and the photovoltaic grid-connected switch K 1 14 are in turn connected in series to the ac bus.
In some embodiments of the present application, the wind power unit 2 includes a wind turbine generator 21, a back-to-back converter, a wind power boost converter 24, and a wind power grid-connected switch K 2 25；
The wind turbine generator 21, the back-to-back converter, the wind power boost converter 24 and the wind power grid-connected switch K 2 25 are sequentially connected in series to the alternating current bus, wherein the back-to-back converter device comprises a wind power AC/DC rectifying device 22 and a wind power DC/AC inverter device 23.
In some embodiments of the present application, the energy storage unit 3 includes an energy storage battery 31, an energy storage DC/AC inverter 32, and an energy storage step-up transformer 33; the energy storage battery 31, the energy storage DC/AC inverter device 32 and the energy storage boosting transformer 33 are sequentially connected in series to the alternating current bus.
In some embodiments of the present application, the power transmission unit 4 includes a first transformer 41, a power transmission line 42, and a second transformer 43, the first transformer 41 is connected to the new energy ac microgrid through the ac bus, and the second transformer 43 is connected to the thermal power generation unit 6 through the ac bus.
In some embodiments of the present application, the load unit 5 includes a load step-down transformer 51 and a load 52, and the load 52 is connected to the new energy ac microgrid through the load step-down transformer 51.
In some embodiments of the present application, the thermal power generation unit 6 includes a thermal power generating unit 61, an auxiliary machine 62, a thermal power boost converter 63, a startup converter 64, and a thermal power generating unit grid-connected switch K 3 65. Auxiliary machine grid-connected switch K 4 66；
The thermal power unit 61 is connected with the thermal power boost transformer 63 and the thermal power unit grid-connected switch K 3 65 to the grid, the auxiliary 62 via the start-up transformer 64 and the auxiliary grid connection switch K 4 66 is connected with a power grid, and the thermal power generating unit 61 is connected with the auxiliary machine 62;
the thermal power generation unit 6 is connected with the new energy alternating current micro grid through the second transformer 43, the power transmission line 42 and the first transformer 41.
The photovoltaic panel 11 passes through the photovoltaic DC/AC inverter 12, the photovoltaic boost transformer 13 and the photovoltaic grid-connected switch K 1 14 are connected in series to an alternating current bus; the wind turbine generator 21 is connected with the wind power grid-connected switch K through a back-to-back converter (namely the wind power AC/DC rectifier 22 and the wind power DC/AC inverter 23), the wind power boost converter 24 and the wind power grid-connected switch K 2 25 are connected in series to an alternating current bus; the energy storage battery 31 is connected in series to an alternating current bus through the energy storage DC/AC inverter device 32 and the energy storage boosting transformer 33; the load 52 is connected to the ac busbar via the step-down transformer 51. The photovoltaic unit 1, the wind power unit 2 and the energy storage unit 3 jointly form a new energy alternating current micro-grid; the thermal power unit 61 passes through the thermal power boosting transformer 63 and the thermal power unit grid-connected switch K 3 65 is connected with the power grid, and the auxiliary machine 62 is connected with an auxiliary machine grid-connected switch K through the starting-up converter 64 4 66 is connected with the power grid; the thermal power generation unit 6 is connected with the new energy alternating current micro grid through the second transformer 43, the power transmission line 42 and the first transformer 41.
In order to start the thermal power generating unit 61, the auxiliary machines 62 such as an oil system and a water supply system need to be started first, the auxiliary machines 62 such as the oil system and the water supply system in the auxiliary machines 62 of the thermal power plant are supplied with power through the backup converter 64, after the auxiliary machines 62 are started, the steam pushes the rotor of the steam turbine with the power generator to rotate so as to generate a magnetic field, and the stator cuts a magnetic induction line so as to generate electric energy, so that the thermal power generating unit 61 is started.
A black start method of a wind-solar-fire storage combined operation system is applied to a wind-solar-fire storage combined operation system black start system comprising a new energy alternating current micro-grid, a power transmission unit 4, a load unit 5 and a thermal power generation unit 6, and comprises the following steps:
step S1: cutting off the load 52 to ensure that the energy storage battery 31 is started in an idle state;
step S2: starting the energy storage unit 3, gradually increasing initial voltage by adopting a zero starting boosting method, supplying power to the alternating current bus, and controlling the voltage amplitude and the frequency of the alternating current bus to be at rated values;
and step S3: the energy storage unit 3 is used for supplying power to the wind turbine generator 21 in the wind power unit 2, the wind turbine generator 21 automatically captures wind energy after the wind speed meets the starting condition, and the wind power grid-connected switch K is closed when the voltage amplitude and the frequency of the output side of the wind power DC/AC inverter 23 reach the reference values 2 25, the wind turbine generator 21 realizes networking;
and step S4: the photovoltaic panel 11 in the photovoltaic unit 1 operates in a Maximum Power Point Tracking (MPPT) mode, and when the amplitude and the frequency of the voltage at the output side of the photovoltaic DC/AC inverter 12 reach reference values, the photovoltaic grid-connected switch K is closed 1 14, the photovoltaic panel 11 realizes networking;
step S5: closing the auxiliary machine grid-connected switch K 4 66, supplying power to the auxiliary machine 62 to start the thermal power generating unit 61, and increasing the voltage by the thermal power generator 63 and the grid-connected switch K of the thermal power generating unit 3 65 implement networking.
In some embodiments of the present application, in the step 3 and the step 4, the reference value is a nominal value of the ac bus voltage amplitude and frequency, and a stable voltage amplitude and frequency reference is provided for the new energy power generation system.
In some embodiments of the present application, in step 5, the auxiliary equipment 62 devices such as an oil system, a water supply system, and the like in the auxiliary equipment 62 of the thermal power plant are powered through the starting-up converter 64, after the auxiliary equipment 62 is started up, the steam pushes the rotor of the steam turbine with the generator to rotate to generate a magnetic field, and the stator cuts the magnetic induction lines to generate electric energy.
The utility model provides a black start-up method of scene storage fire combined operation system specifically operates the step and does:
1) And cutting off the load to ensure that the energy storage battery is started in an idle state.
2) And starting the energy storage unit, gradually increasing the initial voltage by adopting a zero start boosting method, and supplying power to the alternating current bus of the microgrid. And the voltage amplitude and the frequency of the alternating-current bus are controlled at rated values through a control strategy, so that stable voltage amplitude and frequency reference are provided for the new energy power generation system.
3) The energy storage unit is used for supplying power to a wind turbine generator in the wind turbine generator unit, the wind turbine generator unit automatically captures wind energy after the wind speed meets the starting condition, and the grid-connected switch K is closed when the voltage amplitude and the frequency reach the AC bus voltage amplitude and the frequency reference value 2 And the wind turbine generator realizes networking. The photovoltaic panel in the photovoltaic unit works in a Maximum Power Point Tracking (MPPT) mode, and when the voltage amplitude and the frequency of the output side of the photovoltaic DC/AC inverter device reach the voltage amplitude and the frequency reference value of the alternating current bus, the photovoltaic grid-connected switch K is closed 1 。
4) Closing the auxiliary machine grid-connected switch K 4 After the auxiliary machine is started, steam pushes a steam turbine with a generator rotor to rotate to generate a magnetic field, a stator cuts a magnetic induction line to generate electric energy, and the auxiliary machine is connected with a grid switch K of the thermal power generating unit through the boost converter 3 And accessing to a power grid. And after the thermal power plant is connected to the grid, a black start recovery surface is expanded.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. A black start system of a wind-light-fire-storage combined operation system is characterized by comprising: the system comprises a new energy alternating current micro-grid, a power transmission unit, a load unit and a thermal power generation unit;
the new energy alternating current micro-grid is connected with the thermal power generation unit through the power transmission unit, the new energy alternating current micro-grid is connected with the load unit, and the new energy alternating current micro-grid comprises a photovoltaic unit, a wind power unit and an energy storage unit.
2. The wind, light and fire storage combined operation system black start system according to claim 1, wherein the photovoltaic unit comprises a photovoltaic panel, a photovoltaic DC/AC inverter, a photovoltaic step-up transformer and a photovoltaic grid-connected switch K 1 ；
The photovoltaic panel, the photovoltaic DC/AC inverter, the photovoltaic boost transformer and the photovoltaic grid-connected switch K 1 In turn, serially connected to the ac bus.
3. The wind, light and fire storage combined operation system black start system according to claim 2, wherein the wind power unit comprises a wind power generator set, a back-to-back converter device, a wind power boost converter and a wind power grid-connected switch K 2 ；
The wind turbine generator set, the back-to-back converter device, the wind power boosting transformer and the wind power grid-connected switch K 2 And the back-to-back converter devices comprise a wind power AC/DC rectifying device and a wind power DC/AC inverter.
4. The black start system of the wind, light and fire storage combined operation system according to claim 3, wherein the energy storage unit comprises an energy storage battery, an energy storage DC/AC inverter device and an energy storage boosting transformer; the energy storage battery, the energy storage DC/AC inverter device and the energy storage boosting transformer are sequentially connected in series to the alternating current bus.
5. The wind, light and fire storage combined operation system black start system according to claim 4, wherein the power transmission unit comprises a first transformer, a power transmission line and a second transformer, the first transformer is connected with the new energy alternating current micro-grid through the alternating current bus, and the second transformer is connected with the thermal power generation unit through the alternating current bus.
6. The wind, light and fire storage combined operation system black start system according to claim 5, wherein the load unit comprises a load voltage reduction transformer and a load, and the load is connected with the new energy alternating current micro grid through the load voltage reduction transformer.
7. The black start system of the wind, light and fire storage combined operation system according to claim 6, wherein the thermal power generation unit comprises a thermal power unit, an auxiliary machine, a thermal power boost converter, a startup converter and a thermal power unit grid-connected switch K 3 Auxiliary machine grid-connected switch K 4 ；
The thermal power unit is connected with the thermal power boosting transformer and the thermal power unit grid-connected switch K 3 The auxiliary machine is connected with the power grid through the starting transformer and the auxiliary machine grid-connected switch K 4 The thermal power generating unit is connected with the auxiliary machine;
the thermal power generation unit is connected with the new energy alternating current micro-grid through the second transformer, the power transmission line and the first transformer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221495544.6U CN218415828U (en) | 2022-06-14 | 2022-06-14 | Black start system of wind-solar-fire storage combined operation system |
| JP2022003141U JP3239877U (en) | 2022-06-14 | 2022-09-21 | Black start system for wind/solar/thermal combined operation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221495544.6U CN218415828U (en) | 2022-06-14 | 2022-06-14 | Black start system of wind-solar-fire storage combined operation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11824356B1 (en) | 2022-06-30 | 2023-11-21 | Xi'an Thermal Power Research Institute Co., Ltd. | System and method of black start for new power system with energy storage configuration |
| WO2024000996A1 (en) * | 2022-06-30 | 2024-01-04 | 西安热工研究院有限公司 | Black start system and method for new power system allocated energy storage |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116317523B (en) * | 2023-05-25 | 2023-08-01 | 京清数电(北京)技术有限公司 | Energy storage converter black start control method and system, electronic equipment and storage medium |
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2022
- 2022-06-14 CN CN202221495544.6U patent/CN218415828U/en active Active
- 2022-09-21 JP JP2022003141U patent/JP3239877U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11824356B1 (en) | 2022-06-30 | 2023-11-21 | Xi'an Thermal Power Research Institute Co., Ltd. | System and method of black start for new power system with energy storage configuration |
| WO2024000996A1 (en) * | 2022-06-30 | 2024-01-04 | 西安热工研究院有限公司 | Black start system and method for new power system allocated energy storage |
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| JP3239877U (en) | 2022-11-17 |
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