CN211266492U - Auxiliary frequency modulation device of thermal power plant based on energy storage device - Google Patents
Auxiliary frequency modulation device of thermal power plant based on energy storage device Download PDFInfo
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- CN211266492U CN211266492U CN201922233648.4U CN201922233648U CN211266492U CN 211266492 U CN211266492 U CN 211266492U CN 201922233648 U CN201922233648 U CN 201922233648U CN 211266492 U CN211266492 U CN 211266492U
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Abstract
The utility model discloses a supplementary frequency modulation device of thermal power plant based on energy memory relates to the energy storage control field, including first power generation facility, second power generation facility, first electric energy conversion device, second electric energy conversion device, energy memory, first generating line and second generating line, wherein first electric energy conversion device, second electric energy conversion device control electric energy flow between the electrical system of different links, can independently control the transport respectively separately the size and the transport of electric energy the flow direction of electric energy to energy memory also can controlled release or save the electric energy. The utility model discloses energy loss and primary frequency modulation, AGC frequency modulation response speed or regulation rate are slow based on that little generator exists, and the problem that energy conversion rate is not high provides a sensitive, quick, efficient thermal power plant's supplementary frequency modulation device based on energy memory.
Description
Technical Field
The utility model relates to an energy storage control field especially relates to an auxiliary frequency modulation device of thermal power plant based on energy memory.
Background
In order to reduce cost, save energy and reduce emission, a thermal power plant adopts an energy-saving technology for constructing a small generator set, and power is supplied to a plant load or other equipment so as to reduce plant power consumption and improve the economical efficiency of the power plant. In addition, the grid-connected thermal power plant provides auxiliary services according to relevant regulations, including frequency modulation services such as primary frequency modulation and Automatic Generation Control (AGC).
The primary frequency modulation and AGC frequency modulation service of the thermal power plant acts on a thermodynamic system through thermal control, a large response dead zone or an adjustment dead zone exists, the response time is long and can reach tens of seconds generally, the response speed or the adjustment rate is slow, and the energy conversion and utilization efficiency is relatively low.
Therefore, based on above background, for reducing small generating set throttling loss, further improve energy-conserving effect, improve thermal power plant primary control and AGC's performance or examination index simultaneously, reduce energy loss, improve energy utilization efficiency, the utility model discloses based on small generating set energy-conserving technique and primary control, AGC frequency modulation, strive for developing a sensitive, quick, efficient thermal power plant and based on energy-conserving technology auxiliary frequency modulation's system and control method.
SUMMERY OF THE UTILITY MODEL
Based on energy loss and primary control, AGC that above-mentioned little generator exists utilize thermodynamic system to carry out frequency modulation response speed or rate of regulation slow, the not high problem of energy conversion rate, the utility model provides a sensitive, quick, efficient are based on energy memory's supplementary frequency modulation device of thermal power plant.
The utility model provides an auxiliary frequency modulation device of a thermal power plant based on an energy storage device, which comprises a first power generation device, a second power generation device, a first electric energy conversion device, a second electric energy conversion device, an energy storage device, a first bus and a second bus;
the first power generation device comprises a small power generator, a small steam turbine, a steam inlet regulating valve and a device for connecting or disconnecting a first control circuit, wherein the small steam turbine is provided with the steam inlet regulating valve, the small steam turbine is connected with the small power generator, and the small power generator is connected with the first bus through the device for connecting or disconnecting the first control circuit;
the second power generation device comprises a main steam turbine generator set, a main transformer and a device for connecting or disconnecting the second control circuit, wherein the main transformer is connected with the main steam turbine generator set, and is connected with the first power frequency power grid through the device for connecting or disconnecting the second control circuit;
the first electric energy conversion device comprises a first electric energy conversion device, a first transformer, a second transformer, a device for connecting or disconnecting a third control circuit and a device for connecting or disconnecting a fourth control circuit, wherein the first electric energy conversion device is connected with the first bus through the first transformer and the device for connecting or disconnecting the third control circuit in sequence, and the first electric energy conversion device is connected with the first end of the main transformer through the device for connecting or disconnecting the fourth control circuit and the second transformer in sequence;
the second electric energy conversion device comprises a second electric energy conversion device, a third transformer, a fourth transformer, a device for connecting or disconnecting a fifth control circuit, a device for connecting or disconnecting a sixth control circuit and a device for connecting or disconnecting a seventh control circuit, wherein the second electric energy conversion device is sequentially connected with the first bus through the third transformer and the device for connecting or disconnecting the fifth control circuit, the second electric energy conversion device is sequentially connected with the second bus through the fourth transformer and the device for connecting or disconnecting the sixth control circuit, and the second bus is connected with a second power frequency power grid through the device for connecting or disconnecting the seventh control circuit;
and the first bus is connected with a load through an eighth control circuit connection or disconnection device.
Wherein the first and second power conversion devices control the flow of electrical energy between electrical systems at different connection terminals. The first electric energy conversion device and the second electric energy conversion device can respectively and independently control the magnitude of the transmitted electric energy and the flowing direction of the transmitted electric energy.
Further, an energy storage device is arranged on the first bus, and the energy storage device is connected with the first bus through a ninth control circuit connection or disconnection device.
Furthermore, the energy storage mode of the energy storage device is physical energy storage, chemical energy storage or electromagnetic energy storage.
Preferably, the physical stored energy is one or more of compressed air stored energy, flywheel stored energy or rotating equipment stored energy.
Preferably, the chemical stored energy is one or more of a lead acid battery, a redox flow battery, a sodium-sulfur battery, or a lithium ion battery.
Preferably, the electromagnetic energy storage comprises: superconducting electromagnetic energy storage, super capacitor energy storage or a plurality of types.
Further, the small generator is a synchronous generator or a non-synchronous generator; the asynchronous generator comprises an asynchronous generator or a synchronous generator operated in a variable frequency mode.
Further, the synchronous generator operated in a variable frequency mode is driven by a steam turbine.
The utility model provides a pair of thermal power plant's auxiliary frequency modulation device based on energy memory compares in current energy-saving technology and primary control, AGC act on thermodynamic system, adjustment unit and exert oneself, has following advantage:
1. the opening of the steam inlet regulating valve of the small steam turbine is increased, so that the throttling loss is reduced, and the operation efficiency of the small steam turbine can be improved;
2. the first electric energy conversion device has fast response time and high energy conversion and utilization efficiency, can reduce the frequency, time or depth of primary frequency modulation or AGC action of the main steam turbine generator set, and reduces the fluctuation of a thermodynamic system of the main steam turbine generator set and energy loss caused by the fluctuation;
3. the first electric energy conversion device and/or the energy storage device and/or the steam inlet regulating valve are/is controlled in a combined mode, so that the performances of primary frequency modulation, AGC (automatic gain control) regulating depth or regulating range and the like can be improved;
4. the utility model discloses an adjust the precision height (can reach kilowatt level), respond the blind spot promptly or adjust the blind spot little, can make sensitive response to the supplementary frequency modulation instruction of receiving.
Therefore, the utility model discloses sensitivity, quick, high-efficient can reduce the throttle loss of steam turbine, improves the regulation performance of unit primary control, AGC, improves main steam turbine generator set's thermal behavior, improves energy-conserving effect and energy utilization efficiency.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 is a schematic view of a preferred embodiment of the present invention.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.
Example one
As shown in fig. 1, the first power generation device in this embodiment includes a small power generator 1, a small steam turbine 2, a steam inlet regulating valve 201, and a device 101 for connecting or disconnecting a first control circuit; wherein the small turbine 2 is provided with a steam inlet regulating valve 201, the small turbine 2 is provided with a small generator 1, and the small generator 1 is connected with a first bus B1 through a device 101 for connecting or disconnecting a first control circuit;
the second power generation device comprises a main steam turbine generator set 5, a main transformer 6 and a device 701 for connecting or disconnecting a second control circuit, wherein the main transformer 6 is connected with the main steam turbine generator set 5, and the main transformer 6 is connected with the first power frequency power grid through the device 701 for connecting or disconnecting the second control circuit;
the first electric energy conversion device comprises a first electric energy conversion device 3, a first transformer 41, a second transformer 42, a device 301 for connecting or disconnecting the third control circuit and a device 302 for connecting or disconnecting the fourth control circuit, wherein the first electric energy conversion device 3 is sequentially connected with a first bus B1 through the first transformer 41 and the device 301 for connecting or disconnecting the third control circuit, and the first electric energy conversion device 3 is sequentially connected with a main transformer 6 through the device 302 for connecting or disconnecting the fourth control circuit and the second transformer 42;
the second electric energy conversion device comprises a second electric energy conversion device 8, a third transformer 43, a fourth transformer 44, a device 801 for connecting or disconnecting the fifth control circuit, a device 802 for connecting or disconnecting the sixth control circuit and a device 701 for connecting or disconnecting the seventh control circuit, wherein the second electric energy conversion device 8 is sequentially connected with a first bus B1 through the third transformer 43 and the device 801 for connecting or disconnecting the fifth control circuit, the second end of the second electric energy conversion device 8 is sequentially connected with a second bus B2 through the fourth transformer 44 and the sixth 801, and the second bus B2 is connected with a second power frequency grid through the device 701 for connecting or disconnecting the seventh control circuit; the first bus bar B1 is connected to the load through an eighth means for controlling circuit connection or disconnection.
Wherein the first and second electric energy conversion devices 3 and 8 control the flow of electric energy between the electric systems of different connection terminals. The first electric energy conversion device 3 and the second electric energy conversion device 8 can control the magnitude of the supplied electric energy and the flow direction of the supplied electric energy, respectively, independently of each other.
An energy storage device SE1 is arranged on the first bus B1, and the energy storage device SE1 is connected with the first bus B1 through a device 102 for connecting or disconnecting the ninth control circuit.
The energy storage mode of the energy storage device SE1 is selected as compressed air energy storage in physical energy storage. The small generator 1 is a synchronous generator which is selected to operate in a variable frequency mode and is driven by a steam turbine.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (6)
1. An auxiliary frequency modulation device of a thermal power plant based on an energy storage device is characterized by comprising a first power generation device, a second power generation device, a first electric energy conversion device, a second electric energy conversion device, a first bus, a second bus and the energy storage device;
the first power generation device comprises a small power generator, a small steam turbine, a steam inlet regulating valve and a device for connecting or disconnecting a first control circuit, wherein the small steam turbine is provided with the steam inlet regulating valve in a connecting way, the small steam turbine drives the small power generator, and the small power generator is connected with the first bus through the device for connecting or disconnecting the first control circuit;
the second power generation device comprises a main steam turbine generator set, a main transformer and a device for connecting or disconnecting a second control circuit, wherein the main transformer is connected with the main steam turbine generator set, and is connected with a first power frequency power grid through the device for connecting or disconnecting the second control circuit;
the first electric energy conversion device comprises a first electric energy conversion device, a first transformer, a second transformer, a device for connecting or disconnecting a third control circuit and a device for connecting or disconnecting a fourth control circuit, wherein the first electric energy conversion device is connected with the first bus through the first transformer and the device for connecting or disconnecting the third control circuit in sequence, and the first electric energy conversion device is connected with the first end of the main transformer through the device for connecting or disconnecting the fourth control circuit and the second transformer in sequence;
the second electric energy conversion device comprises a second electric energy conversion device, a third transformer, a fourth transformer, a device for connecting or disconnecting a fifth control circuit, a device for connecting or disconnecting a sixth control circuit and a device for connecting or disconnecting a seventh control circuit, wherein the second electric energy conversion device is sequentially connected with the first bus through the third transformer and the device for connecting or disconnecting the fifth control circuit, the second electric energy conversion device is sequentially connected with the second bus through the fourth transformer and the device for connecting or disconnecting the sixth control circuit, and the second bus is connected with a second power frequency power grid through the device for connecting or disconnecting the seventh control circuit;
the first bus is connected with a load through an eighth control circuit connection or disconnection device,
the energy storage device is connected with the first bus through a device for connecting or disconnecting the energy storage device through a ninth control circuit;
the energy storage mode of the energy storage device is physical energy storage, chemical energy storage or electromagnetic energy storage.
2. An auxiliary frequency modulation device of a thermal power plant based on an energy storage device as claimed in claim 1, characterized in that the physical energy storage is compressed air energy storage, flywheel energy storage or rotating equipment energy storage.
3. The auxiliary frequency modulation device of a thermal power plant based on an energy storage device as claimed in claim 1, wherein the chemical energy storage is a lead-acid battery, a redox flow battery, a sodium-sulfur battery or a lithium-ion battery.
4. An auxiliary frequency modulation device of a thermal power plant based on an energy storage device according to claim 1, characterized in that the electromagnetic energy storage comprises: superconducting electromagnetic energy storage and super capacitor energy storage.
5. The auxiliary frequency modulation device of a thermal power plant based on an energy storage device as claimed in claim 1, wherein the small generator is a synchronous generator or a non-synchronous generator; the asynchronous generator comprises an asynchronous generator or a synchronous generator operated in a variable frequency mode.
6. An auxiliary frequency modulation device of a thermal power plant based on an energy storage device as claimed in claim 5, characterized in that said synchronous generator operated with variable frequency is driven by a steam turbine.
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| CN201922233648.4U CN211266492U (en) | 2019-12-12 | 2019-12-12 | Auxiliary frequency modulation device of thermal power plant based on energy storage device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932293A (en) * | 2019-12-12 | 2020-03-27 | 上海外高桥第三发电有限责任公司 | Auxiliary frequency modulation device of thermal power plant based on energy storage device and control method |
| CN113078659A (en) * | 2021-03-31 | 2021-07-06 | 西安热工研究院有限公司 | Capacity selection method for AGC frequency modulation device of energy storage auxiliary thermal power generating unit |
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- 2019-12-12 CN CN201922233648.4U patent/CN211266492U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932293A (en) * | 2019-12-12 | 2020-03-27 | 上海外高桥第三发电有限责任公司 | Auxiliary frequency modulation device of thermal power plant based on energy storage device and control method |
| CN110932293B (en) * | 2019-12-12 | 2024-06-11 | 上海外高桥第三发电有限责任公司 | Auxiliary frequency modulation device of thermal power plant based on energy storage device and control method |
| CN113078659A (en) * | 2021-03-31 | 2021-07-06 | 西安热工研究院有限公司 | Capacity selection method for AGC frequency modulation device of energy storage auxiliary thermal power generating unit |
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