CN111244984A - Black-start energy storage system and method - Google Patents
Black-start energy storage system and method Download PDFInfo
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- CN111244984A CN111244984A CN202010137741.XA CN202010137741A CN111244984A CN 111244984 A CN111244984 A CN 111244984A CN 202010137741 A CN202010137741 A CN 202010137741A CN 111244984 A CN111244984 A CN 111244984A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 33
- 241001672018 Cercomela melanura Species 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000010248 power generation Methods 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention discloses a black-start energy storage system and method, which comprises an air compressor, a motor, an air storage tank, an expander, a generator and a transformer, wherein the air compressor is connected with the air storage tank through a pipeline, an outlet pipeline of the air storage tank is connected to an inlet of the expander, the air compressor is connected with the motor through a first transmission shaft, the generator is connected with the expander through a second transmission shaft, the motor is electrically connected with a service bus, an air switch is arranged between the motor and the service bus, the generator is electrically connected with the transformer, a power switch is arranged between the generator and the transformer, and the transformer is electrically connected with a power grid. The black-start energy storage system provided by the invention has no auxiliary system, adopts manual control in the power generation link, can start compressed air to release energy to transmit power to a power grid system in a full-stop state of the power grid, and realizes the black-start function of the power grid system.
Description
Technical Field
The invention belongs to the technical field of energy storage, and particularly relates to a black-start energy storage system and method.
Background
The black start refers to a process of gradually recovering a system by using a unit with self-starting capability in the system after the whole power grid is subjected to a large disturbance or fault and a power failure accident occurs, and finally, the whole power system is recovered to a normal operation state. The self-starting capability is a capability of starting the unit from a stop state within a predetermined time and transmitting power to the system when no external power is supplied.
The compressed air energy storage system realizes energy storage and energy release functions through compressed air and air expansion respectively. When the electric quantity is excessive, starting a compressed air energy storage process, consuming electric energy to drive a compressor to operate, and compressing air and then entering a compressed air storage tank; when the electric quantity is in short supply, starting a compressed air energy storage and release process: the high-pressure air in the air storage tank enters the expansion machine to expand, and the expansion machine is driven to rotate to drive the generator to generate electricity. The compressed air energy storage power station can be optimally designed, has self-starting capability through manual control, and participates in black starting of a power grid as a black starting power supply after a power grid system fails.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the energy storage system and the method for the black start have no auxiliary system, manual control is adopted in a power generation link, compressed air can be started to release energy to transmit power to a power grid system in a full-stop state of the power grid, and the black start function of the power grid system is realized.
The technical scheme adopted by the invention is as follows: the utility model provides an energy storage system of black start, including air compressor, a motor, the gas holder, the expander, generator and transformer, through the pipe connection between air compressor and the gas holder, gas holder export pipeline inserts the expander entry, air compressor and motor pass through transmission shaft one and connect, the generator passes through transmission shaft two with the expander and links to each other, the motor is connected with the station service generating line electricity, be provided with air switch between motor and the station service generating line, the generator is connected with the transformer electricity, be provided with switch between generator and the transformer, the transformer links to each other with the electric wire netting electricity.
Preferably, the expander is a turbo expander, and is of a single-stage structure or a multi-stage structure, and the bearings are lubricated by solid.
Preferably, a metal filter screen with 80-200 meshes is arranged at the inlet of the air compressor.
Preferably, the generator is a synchronous ac three-phase generator, and a self-excited constant-voltage excitation method is adopted.
Preferably, a manual stop valve is arranged on a pipeline between the air compressor and the air storage tank, and a manual regulating valve is arranged on a pipeline between the air storage tank and the expander.
Preferably, the low-voltage side of the transformer is the generator terminal voltage, and the high-voltage side is the voltage of the power grid access point.
A control method of a black-start energy storage system comprises the following steps: when the power grid normally supplies power, a motor power switch is switched on, the starting motor drives the air compressor to operate, the manual stop valve of the inlet of the air storage tank is opened, and the pressure in the air storage tank is lifted to be higher than the pressure in the air storage tankP je When the temperature of the water is higher than the set temperature,P je the manual stop valve at the inlet of the air storage tank is closed for the rated pressure of the air storage tank, the air compressor is stopped, and the compressed air energy storage system is in a standby state; when the power grid is in a non-electricity state and needs to be started in a black state, the compressed air energy storage system is started to generate power and release energy, the air inlet manual regulating valve is manually opened, the expander is started to drive the generator to work, and when the rotating speed of the expander reaches a rated value and the voltage at the generator end reaches the rated value, the air switch at the outlet of the generator is closed to supply power to the power grid.
And in the power generation and energy release stage of the compressed air energy storage system, the opening degree of the air inlet manual regulating valve is adjusted according to the needs of a power grid, and the output power of the expansion generator is changed.
When the pressure of the gas storage tank is lower thanP jl When the temperature of the water is higher than the set temperature,P jl and (4) closing the air inlet manual regulating valve to cut off an air switch at the outlet of the generator and stopping the system when the lowest load pressure of the air storage tank is reached.
The invention has the beneficial effects that: compared with the prior art, the black-start energy storage system provided by the invention has no auxiliary system, adopts manual control in the power generation link, can start compressed air to release energy to transmit power to a power grid system in a full-stop state of the power grid, and realizes the black-start function of the power grid system.
Drawings
FIG. 1 is a system diagram of the present invention with thick solid lines for the piping connections and thin solid lines for the electrical connections.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1, an energy storage system of black start, including air compressor 1, motor 2, gas holder 3, expander 4, generator 5 and transformer 6, through the pipe connection between air compressor 1 and the gas holder 3, 3 export pipelines of gas holder insert the 4 entrances of expander, air compressor 1 and motor 2 pass through transmission shaft one and connect, generator 5 links to each other through transmission shaft two with expander 4, motor 2 is connected with the station service bus electricity, be provided with air switch between motor 2 and the station service bus, generator 5 is connected with transformer 6 electricity, be provided with switch between generator 5 and the transformer 6, transformer 6 links to each other with the electric wire netting electricity.
Preferably, the expander 8 adopts a turbine expander, and is of a single-stage structure or a multi-stage structure, the bearings adopt solid lubrication, and the system is simple without an additional auxiliary system.
Preferably, a metal filter screen of 80-200 meshes is provided at the inlet of the air compressor 1 to prevent large particles of impurities from entering the expander.
Preferably, the generator 5 is a synchronous ac three-phase generator, and a self-excited constant-voltage excitation method is adopted.
Preferably, a manual stop valve 8 is provided in a pipe between the air compressor 1 and the air tank 3, and a manual control valve 7 is provided in a pipe between the air tank 3 and the expander 4.
Preferably, the low voltage side of the transformer 6 is the generator terminal voltage, and the high voltage side is the voltage of the grid access point.
Example 2: a control method of a black-start energy storage system comprises the following steps: when the power grid normally supplies power, a motor power switch is switched on, the starting motor drives the air compressor to operate, the manual stop valve of the inlet of the air storage tank is opened, and the pressure in the air storage tank is lifted to be higher than the pressure in the air storage tankP je When the temperature of the water is higher than the set temperature,P je the manual stop valve at the inlet of the air storage tank is closed for the rated pressure of the air storage tank, the air compressor is stopped, and the compressed air energy storage system is in a standby state; when the power grid is in a non-electricity state and needs to be started in a black state, the compressed air energy storage system is started to generate power and release energy, the air inlet manual regulating valve is manually opened, the expander is started to drive the generator to work, when the rotating speed of the expander reaches a rated value,and when the voltage at the generator terminal reaches the rated value, closing an air switch at the outlet of the generator to supply power to the power grid.
In the power generation and energy release stage of the compressed air energy storage system, the opening degree of an air inlet manual regulating valve is adjusted according to the needs of a power grid, and the output power of an expansion generator is changed; when the pressure of the gas storage tank is lower thanP jl When the temperature of the water is higher than the set temperature,P jl and (4) closing the air inlet manual regulating valve to cut off an air switch at the outlet of the generator and stopping the system when the lowest load pressure of the air storage tank is reached.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (9)
1. A black start energy storage system, characterized by: including air compressor (1), motor (2), gas holder (3), expander (4), generator (5) and transformer (6), through the pipe connection between air compressor (1) and gas holder (3), gas holder (3) export pipeline inserts expander (4) entry, air compressor (1) and motor (2) are connected through transmission shaft one, generator (5) link to each other through transmission shaft two with expander (4), motor (2) are connected with the station service bus electricity, be provided with air switch between motor (2) and the station service bus electricity, generator (5) are connected with transformer (6) electricity, be provided with switch between generator (5) and transformer (6), transformer (6) link to each other with the electric wire netting electricity.
2. A black-start energy storage system according to claim 1, wherein: the expansion machine (8) adopts a turbine expansion machine, is of a single-stage structure or a multi-stage structure, and the bearing adopts solid lubrication.
3. A black-start energy storage system according to claim 1, wherein: the inlet of the air compressor (1) is provided with a metal filter screen of 80-200 meshes.
4. A black-start energy storage system according to claim 1, wherein: the generator (5) is a synchronous alternating-current three-phase generator and adopts a self-excitation constant-voltage excitation mode.
5. A black-start energy storage system according to claim 1, wherein: a manual stop valve (8) is arranged on a pipeline between the air compressor (1) and the air storage tank (3), and a manual regulating valve (7) is arranged on a pipeline between the air storage tank (3) and the expansion machine (4).
6. A black-start energy storage system according to claim 1, wherein: the low-voltage side of the transformer (6) is the generator terminal voltage, and the high-voltage side is the voltage of a power grid access point.
7. The method of controlling a black-start energy storage system according to any one of claims 1 to 6, wherein: the method comprises the following steps: when the power grid normally supplies power, a motor power switch is switched on, the starting motor drives the air compressor to operate, the manual stop valve of the inlet of the air storage tank is opened, and the pressure in the air storage tank is lifted to be higher than the pressure in the air storage tankP je When the temperature of the water is higher than the set temperature,P je the manual stop valve at the inlet of the air storage tank is closed for the rated pressure of the air storage tank, the air compressor is stopped, and the compressed air energy storage system is in a standby state; when the power grid is in a non-electricity state and needs to be started in a black state, the compressed air energy storage system is started to generate power and release energy, the air inlet manual regulating valve is manually opened, the expander is started to drive the generator to work, and when the rotating speed of the expander reaches a rated value and the voltage at the generator end reaches the rated value, the air switch at the outlet of the generator is closed to supply power to the power grid.
8. The method of claim 7, wherein the method further comprises: and in the power generation and energy release stage of the compressed air energy storage system, the opening degree of the air inlet manual regulating valve is adjusted according to the needs of a power grid, and the output power of the expansion generator is changed.
9. The method of claim 7, wherein the method further comprises: when the pressure of the gas storage tank is lower thanP jl When the temperature of the water is higher than the set temperature,P jl and (4) closing the air inlet manual regulating valve to cut off an air switch at the outlet of the generator and stopping the system when the lowest load pressure of the air storage tank is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010137741.XA CN111244984A (en) | 2020-03-02 | 2020-03-02 | Black-start energy storage system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010137741.XA CN111244984A (en) | 2020-03-02 | 2020-03-02 | Black-start energy storage system and method |
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| CN111244984A true CN111244984A (en) | 2020-06-05 |
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| CN202010137741.XA Pending CN111244984A (en) | 2020-03-02 | 2020-03-02 | Black-start energy storage system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682296A (en) * | 2020-12-30 | 2021-04-20 | 中国核电工程有限公司 | Emergency power system for nuclear power plant and power system of nuclear power plant |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009103058A (en) * | 2007-10-23 | 2009-05-14 | Chugoku Electric Power Co Inc:The | Compressed air control device |
| CN110513277A (en) * | 2019-10-12 | 2019-11-29 | 贵州电网有限责任公司 | A kind of power plant's compressed-air energy-storage system and its control method |
-
2020
- 2020-03-02 CN CN202010137741.XA patent/CN111244984A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009103058A (en) * | 2007-10-23 | 2009-05-14 | Chugoku Electric Power Co Inc:The | Compressed air control device |
| CN110513277A (en) * | 2019-10-12 | 2019-11-29 | 贵州电网有限责任公司 | A kind of power plant's compressed-air energy-storage system and its control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682296A (en) * | 2020-12-30 | 2021-04-20 | 中国核电工程有限公司 | Emergency power system for nuclear power plant and power system of nuclear power plant |
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