CN111009908B - Scheme for realizing low-power phase modulation operation of combustion engine by utilizing electric energy storage - Google Patents
Scheme for realizing low-power phase modulation operation of combustion engine by utilizing electric energy storage Download PDFInfo
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- CN111009908B CN111009908B CN201911330035.0A CN201911330035A CN111009908B CN 111009908 B CN111009908 B CN 111009908B CN 201911330035 A CN201911330035 A CN 201911330035A CN 111009908 B CN111009908 B CN 111009908B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 53
- 238000002485 combustion reaction Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 101150003196 PCS1 gene Proteins 0.000 claims 3
- 101150071172 PCS2 gene Proteins 0.000 claims 3
- 101100493726 Phalaenopsis sp. BIBSY212 gene Proteins 0.000 claims 3
- 101100030895 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPT4 gene Proteins 0.000 claims 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The purpose of the present disclosure is to provide a method for implementing virtual low-power phase modulation operation of a gas turbine by using an electric energy storage device, wherein the energy storage device is used as a load to absorb a part of power of the gas turbine to form a virtual low-power working condition, so that emission of NOx during low-power operation of the gas turbine is reduced. Meanwhile, the energy storage device is used as a static var Generator (STATIC VAR Generator SVG), so that more dynamic reactive power support can be provided for the system, and the aim of reducing emission is fulfilled.
Description
Technical Field
The invention belongs to the field of comprehensive optimization control of electrical engineering, and particularly relates to a method for realizing virtual low-power phase modulation operation of a gas turbine by utilizing electric energy storage.
Background
In recent years, the high-capacity and long-distance ultra-high voltage alternating current/direct current transmission technology is rapidly developed, and the problems brought by the 'strong-direct-weak-alternating-current' structure of the power grid are prominent: with large-scale feeding of direct current, the ultra-high voltage direct current receiving end power grid of the power grid is insufficient in dynamic reactive power. The specific reason is that: according to the direct current design principle, direct current does not provide dynamic reactive power for the system. In the dynamic process of large-scale active power transmission, the extra-high voltage direct current transmission also needs to absorb a large amount of reactive power from the system, so that the reactive power of a receiving end power grid is insufficient.
The large-scale gas turbine is used as a generator set with rapid start and stop and convenient adjustment, is relatively suitable for the application of dynamic reactive power support of the receiving end power grid, does not excessively increase the basic load demand of the receiving end power grid, and the reactive power support is realized by a low-power phase modulation operation technology of the gas turbine. However, during low power phasing operation of the gas turbine, increased NOx emissions may occur, which presents difficulties in the promotion of this technology.
Disclosure of Invention
In view of the above problems, an object of the present disclosure is to provide a method for implementing virtual low-power phase modulation operation of a gas turbine by using an electric energy storage device, including the following steps:
s100: adding a plurality of electric energy storage devices to operate in combination with the gas turbine so as to form a virtual low-power working condition;
s200: and grouping the plurality of electric energy storage devices to realize block energy storage.
The method for realizing the virtual low-power phase modulation operation of the gas turbine by using the electric energy storage device uses the electric energy storage device as a load to absorb part of power of the gas turbine to form a virtual low-power working condition, so that the emission of NOx during the low-power operation of the gas turbine is reduced. Meanwhile, the electric energy storage device is used as SVG, so that more dynamic reactive power support can be provided for the system, and the aim of reducing emission is achieved.
Drawings
FIG. 1 is a flow chart illustrating a method of implementing virtual low power phasing operation of a gas turbine using an electrical energy storage device;
FIG. 2 is a schematic diagram of a method for implementing virtual low power phasing operation of a gas turbine using an electrical energy storage device shown in the present disclosure;
FIG. 3 is a connection topology of a gas turbine set and an energy storage device shown in the present disclosure;
FIG. 4 is a schematic diagram of a voltage correction scenario after the application of an energy storage device;
fig. 5 is a graph of reactive output after the energy storage device is applied in a simulation.
Detailed Description
The technical scheme of the present disclosure is described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, a method for implementing virtual low-power phase modulation operation of a gas turbine by using an electric energy storage device comprises the following steps:
s100: adding a plurality of electric energy storage devices to operate in combination with the gas turbine so as to form a virtual low-power working condition;
The virtual low-power working condition is a working condition that the energy storage device is used as a load to absorb a part of power of the gas turbine to externally realize overall low-power operation, and under the working condition, the running condition of the gas turbine is relatively stable, more dynamic reactive power regulation resources can be provided for the system, and meanwhile, the NOx emission during the low-power operation of the gas turbine can be reduced.
S200: and grouping the plurality of electric energy storage devices to realize block energy storage.
After the electric energy storage devices are grouped, the load power of the uncharged energy storage devices in the electricity storage process can be fully utilized, the active power of the gas turbine is continuously shared, and the virtual low power state is maintained. For charged electrical energy storage devices, reactive power may be provided to the system by a Power Control System (PCS) of the power electronics, thereby achieving a deep conversion of active power into reactive power.
As shown in fig. 2, several energy storage devices operating in conjunction with the gas turbine are grouped to implement block energy storage, thereby enabling dynamic reactive support.
Under the virtual low power region working condition, the power of the combustion engine does not actually drop, but the output energy is injected into the electric energy storage device, and the electric energy storage device injects additional reactive power into the system through the PCS device, so that the reactive power adjusting range of the unit is enlarged from delta Q to delta Q', and the virtual low power working condition is realized.
The operation effect of the invention can be seen by software simulation, and the simulated circuit is shown in fig. 3. The simulation content comprises 5 parts of a simulated power grid system, a gas turbine unit, a power control system, an energy storage system, a disturbance simulation unit and the like.
The energy storage system is formed by connecting a capacitor and a battery in parallel, when the battery is not connected, the power control system can simulate the operation of a Static Var Generator (SVG), and can also play a role in virtual low-power operation to a certain extent, and the effect is as shown in the voltage deviation rectifying condition shown in fig. 4 and the reactive output condition shown in fig. 5.
It can be seen from fig. 4 that the voltage deviation range is further narrowed after the energy storage device is applied.
It can be seen from fig. 5 that when the energy storage device is applied, the active power of the gas turbine is not increased, the voltage deviation is further reduced, the reactive power output is further increased, and the effect of virtual low-power phase modulation operation is achieved.
Claims (1)
1. A method for implementing virtual low power phasing operation of a gas turbine using an electrical energy storage device, comprising the steps of:
s100: adding a plurality of electric energy storage devices to operate in combination with the gas turbine so as to form a virtual low-power working condition;
s200: grouping a plurality of electric energy storage devices to realize block energy storage;
Wherein,
After the electric energy storage devices are grouped, the active power of the gas turbine is continuously shared by utilizing the load power of the uncharged energy storage devices in the electricity storage process, a virtual low power state is kept, and reactive power is provided for the charged electric energy storage devices through a Power Control System (PCS) of power electronics, so that the deep conversion from the active power to the reactive power is realized;
Under the working condition of a virtual low power area, the power of the combustion engine does not actually drop, but the output energy is injected into an electric energy storage device, and the electric energy storage device injects additional reactive power into the system through a Power Control System (PCS) device of power electronics, so that the reactive power adjustment range of the unit is enlarged from delta Q to delta Q', and the working condition of virtual low power is realized;
Wherein,
Each of the electrical energy storage devices is connected in series with a Power Control System (PCS) of the power electronics to form a group, wherein,
The lower end of the electric energy storage device 1 is connected in series with the upper end of the power control system PCS1, the lower end of the electric energy storage device 2 is connected in series with the upper end of the power control system PCS2, … …, the lower end of the electric energy storage device n is connected in series with the upper end of the power control system PCSn, and the plurality of groups are further connected in parallel,
And in each group, the upper end of the electric energy storage device 1 is connected with a switch, the upper end of the electric energy storage device 2 is also connected with a switch, the upper end of the electric energy storage device n is also connected with a switch,
And in each group, the lower end of the power control system PCS1 is connected with a switch, the lower end of the power control system PCS 2 is also connected with a switch, the lower end of the power control system PCS n is also connected with a switch,
And the first group of the electric energy storage device 1 and the power control system PCS1 is directly connected with the second group of the electric energy storage device 2 and the power control system PCS2, the upper ends of the groups are also directly connected with the lower ends of the groups,
Between the second group and the other groups of the power control system PCS2, which are located in the electric energy storage device 2, there is a switch between the upper ends of the groups, and there is a switch between the lower ends of the groups,
And, in addition, the method comprises the steps of,
After a plurality of groups are connected in parallel, the upper ends of the first group and the second group are connected to one end of a gas turbine corresponding gas turbine unit through a switch, the upper ends of other groups after the second group are also connected to one end of the gas turbine corresponding gas turbine unit through another switch,
The other end of the gas unit is connected to the lower ends of the first group and the second group via one switch, and the other end of the gas unit is also connected to the lower ends of the other groups via another switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811567489 | 2018-12-20 | ||
| CN2018115674895 | 2018-12-20 |
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