CN210608563U - Energy storage frequency modulation system capable of being configured flexibly - Google Patents
Energy storage frequency modulation system capable of being configured flexibly Download PDFInfo
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- CN210608563U CN210608563U CN201921564599.6U CN201921564599U CN210608563U CN 210608563 U CN210608563 U CN 210608563U CN 201921564599 U CN201921564599 U CN 201921564599U CN 210608563 U CN210608563 U CN 210608563U
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Abstract
The application discloses a flexibly configurable energy storage frequency modulation system, which comprises a 1# energy storage unit, a 2# energy storage unit, a 1# energy storage switch, a 2# energy storage switch, an energy storage high-voltage bus A section, an energy storage high-voltage bus B section, an energy storage bus-tie switch, a 1# grid-connected switch, a 2# grid-connected switch, a 1# plant service bus, a 2# plant service bus, a 1# high plant transformer, a 2# high plant transformer, a 1# generator set and a 2# generator set; the energy storage system and the 1# unit or the 2# unit are operated in a combined mode, and if necessary, the energy storage system can be divided into two energy storage units which are operated in a combined mode with the 1# unit and the 2# unit; the flexibility of the system is increased, the combined operation mode can be flexibly adjusted according to the characteristics of the frequency modulation instruction, and the frequency modulation benefit is improved.
Description
Technical Field
The utility model belongs to the technical field of thermoelectricity energy storage frequency modulation, a energy storage frequency modulation system that can dispose in a flexible way is related to.
Background
The secondary frequency modulation is a key technology for maintaining the safe and stable operation of a power grid, and the main frequency modulation resource in China is realized by an Automatic Gain Control (AGC) device of a thermal power generating unit at present. The output of the thermal power generating unit is automatically adjusted through an AGC device, the power value of a power grid dispatching instruction is tracked, the consistency of the total output of the thermal power generating unit and the total load of the power grid is kept in real time, and the frequency stability of the power grid is maintained. However, the thermal power generating unit has limited regulation rate, poor regulation precision and long response time, and the thermal power generating unit participates in frequency modulation for a long time and has larger abrasion to equipment.
In recent years, the continuous progress of energy storage and application technology thereof enables the fire storage combined frequency modulation to become a mature thermal power frequency modulation performance improvement and transformation scheme. The principle is that the characteristics of high electrochemical energy storage regulation speed, high regulation precision and short response time are fully exerted, an energy storage system is connected into a high-voltage plant power system of a thermal power plant, the total output of a main transformer grid-connected part of the thermal power unit is regulated through battery charging and discharging, and an AGC dispatching instruction is better tracked.
At present, the frequency modulation project of the domestic fire-storage combination is more than dozens of, the integral operation effect is good, but the system scheme still has an optimized space. Most of domestic thermal power plants at present have topological structures comprising two or more than two generator sets, and energy storage frequency modulation systems put into operation at present are designed to be operated only in combination with a single generator set and cannot simultaneously optimize the two generator sets, but practical operation experience shows that the situation that the two generator sets are put into frequency modulation at the same time happens.
Disclosure of Invention
In order to solve the defects in the prior art, the energy storage frequency modulation system capable of being flexibly configured is provided, so that the combined operation of a set of energy storage system and a 1# machine set or a 2# machine set is realized, and if necessary, the set of energy storage system can be divided into two energy storage units which are simultaneously combined with the 1# machine set and the 2# machine set; the flexibility of the system is increased, the combined operation mode can be flexibly adjusted according to the characteristics of the frequency modulation instruction, and the frequency modulation benefit is improved.
In order to achieve the above objective, the following technical solutions are adopted in the present application:
a flexibly configurable energy storage frequency modulation system comprises a 1# energy storage unit, a 2# energy storage unit, a 1# energy storage switch, a 2# energy storage switch, an energy storage high-voltage bus A section, an energy storage high-voltage bus B section, an energy storage bus-tie switch, a 1# grid-connected switch, a 2# grid-connected switch, a 1# plant service bus, a 2# plant service bus, a 1# high plant transformer, a 2# high plant transformer, a 1# generator set and a 2# generator set;
the 1# energy storage unit is connected to the energy storage high-voltage bus A section through the 1# energy storage switch;
the 2# energy storage unit is connected to the B section of the energy storage high-voltage bus through the 2# energy storage switch;
the energy storage high-voltage bus A section is connected with the energy storage high-voltage bus B section through an energy storage bus coupler switch;
the section A of the energy storage high-voltage bus is connected to a No. 1 unit service bus through a No. 1 grid-connected switch;
the section B of the energy storage high-voltage bus is connected to a No. 2 machine set service bus through a No. 2 grid-connected switch;
the 1# unit service bus is connected with the 1# generator set through the 1# high station transformer;
and the # 2 unit service bus is connected with the # 2 generator set through the # 2 high station transformer.
The utility model discloses further include following preferred scheme:
preferably, the # 1 unit service bus and the # 2 unit service bus are both unit service 6kV buses.
Preferably, the 1# energy storage unit and the 2# energy storage unit each comprise a transformer, a converter and a battery module.
Preferably, the 1# energy storage unit and the 2# energy storage unit are the same type and the same specification of electrochemical energy storage battery.
Preferably, the # 1 energy storage unit and the # 2 energy storage unit are different types or different specifications of electrochemical energy storage batteries.
The beneficial effect that this application reached:
the utility model realizes the combined operation of a set of energy storage system and the 1# machine set or the 2# machine set, and if necessary, the set of energy storage system can be divided into two energy storage units which are simultaneously combined with the 1# machine set and the 2# machine set; the system flexibility is increased, the combined operation mode can be flexibly adjusted according to the characteristics of the frequency modulation instruction, and the frequency modulation benefit is improved, specifically as follows:
1. aiming at the condition that a single unit participates in frequency modulation and the frequency modulation instruction has larger adjustment depth, the utility model can adopt the operation mode that two energy storage units simultaneously and the single unit jointly operate;
2. aiming at the condition that a single unit participates in frequency modulation and the frequency modulation instruction has smaller adjustment depth, and a single energy storage unit can meet the requirement, the utility model can adopt the operation mode that the single energy storage unit and the single unit run together and the other energy storage unit stands still;
3. aiming at the condition that two units participate in frequency modulation at the same time, the utility model can adopt the running mode that the 1# energy storage unit and the 1# generating set run jointly, and the 2# energy storage unit and the 2# generating set run jointly at the same time;
4. the utility model discloses a two energy storage units can comprise different varieties, different performance energy storage battery, according to frequency modulation command characteristic, singly call or jointly call as required.
Drawings
Fig. 1 is a schematic structural diagram of a flexibly configurable energy storage frequency modulation system according to the present invention;
wherein the reference symbols of figure 1 have the following meanings: the energy storage device comprises a 1# energy storage unit, a 2# energy storage unit, a 3 # energy storage switch, a 4 # energy storage switch, a 5 # energy storage high-voltage bus A section, a 6 # energy storage high-voltage bus B section, a 7 # energy storage bus-tie switch, a 8 # grid-connected switch, a 9 # grid-connected switch, a 10 # factory power bus, a 11 # factory power bus, a 12 # high factory transformer, a 13 # high factory transformer, a 14 # generator set and a 15 # generator set.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the utility model discloses an energy storage frequency modulation system that can dispose in a flexible way, including 1# energy storage unit 1, 2# energy storage unit 2, 1# energy storage switch 3, 2# energy storage switch 4, energy storage high-voltage bus a section 5, energy storage high-voltage bus B section 6, energy storage bus-tie switch 7, 1# grid-connected switch 8, 2# grid-connected switch 9, 1# plant service bus 10, 2# plant service bus 11, 1# high- plant transformer 12, 2# high-plant transformer 13, 1# generating set 14 and 2# generating set 15;
the 1# energy storage unit 1 is connected to an energy storage high-voltage bus A section 5 through a 1# energy storage switch 3;
the 2# energy storage unit 2 is connected to an energy storage high-voltage bus section B6 through a 2# energy storage switch 4;
the energy storage high-voltage bus A section 5 is connected with the energy storage high-voltage bus B section 6 through an energy storage bus coupler switch 7;
the energy storage high-voltage bus A section 5 is connected to a No. 1 unit service bus 10 through a No. 1 grid-connected switch 8;
the energy storage high-voltage bus B section 6 is connected to a No. 2 machine auxiliary bus 11 through a No. 2 grid-connected switch 9;
the 1# unit service power bus 10 is connected with a 1# generator set 14 through a 1# high station transformer 12;
and the 2# plant service power bus 11 is connected with the 2# generator set 15 through a 2# high station transformer 13.
The energy storage bus-bar switch 7 can be flexibly switched on and off according to the situation.
When the energy storage device is disconnected, the 1# energy storage unit 1 and the 2# energy storage unit 2 can independently operate and can respectively jointly operate with the two units to participate in energy storage frequency modulation.
When the energy storage unit is closed, the 1# energy storage unit 1 and the 2# energy storage unit 2 are enabled to jointly operate with a single unit as a whole to participate in energy storage frequency modulation.
In an embodiment, the # 1 plant service power bus 10 and the # 2 plant service power bus 11 are both plant service power 6kV buses.
The 1# energy storage unit 1 and the 2# energy storage unit 2 both comprise a transformer, a converter and a battery module.
The battery module can be a high-rate lithium iron phosphate battery or a lithium titanate battery and the like; the converter can be a bidirectional DC/AC converter; the transformer can be a double-winding three-phase dry box transformer.
The No. 1 energy storage unit 1 and the No. 2 energy storage unit 2 are electrochemical energy storage batteries with the same species and the same specification.
The # 1 energy storage unit 1 and the # 2 energy storage unit 2 are different types or different specifications of electrochemical energy storage batteries, for example, the # 1 energy storage unit 1 is composed of a high-rate and small-capacity lithium iron phosphate battery, and the # 2 energy storage unit 2 is composed of a low-rate and large-capacity lead carbon battery. In an embodiment, the 1# energy storage unit 1 and the 2# energy storage unit 2 can be called singly or jointly according to the frequency modulation command characteristic.
The utility model discloses an operation control mode and function as follows with realizing:
(1) aiming at the condition that a single unit participates in frequency modulation and the frequency modulation instruction has large adjustment depth:
the 1# energy storage switch 3, the 2# energy storage switch 4 and the energy storage bus-tie switch 7 are simultaneously closed, the 1# grid-connected switch 8 is closed, and the 2# grid-connected switch 9 is opened. The two energy storage units simultaneously and jointly operate with the 1# generator set 14;
the 1# energy storage switch 3, the 2# energy storage switch 4 and the energy storage bus-tie switch 7 are simultaneously closed, the 1# grid-connected switch 8 is opened, and the 2# grid-connected switch 9 is closed. The two energy storage units are simultaneously operated in combination with the 2# generator set 15.
(2) Aiming at the condition that a single unit participates in frequency modulation and the frequency modulation instruction has small adjustment depth, a single energy storage unit can meet the requirement:
the 1# energy storage switch 3 is closed, the 1# grid-connected switch 8 is closed, the energy storage bus-tie switch 7 is opened, and the 2# energy storage switch 4 is opened. The 1# energy storage unit 1 and the 1# generator set 14 run in a combined mode, and the 2# energy storage unit 2 stands still;
the 2# energy storage switch 4 is closed, the 2# grid-connected switch 9 is closed, the energy storage bus-tie switch 7 is opened, and the 1# energy storage switch 3 is opened. The 2# energy storage unit 2 and the 2# generator set 15 run in a combined mode, and the 1# energy storage unit 1 stands still;
the 1# energy storage switch 3 is closed, the energy storage bus-tie switch 7 is closed, the 2# grid-connected switch 9 is closed, and the 2# energy storage switch 4 is opened. The 1# energy storage unit 1 and the 2# generator set 15 run in a combined mode, and the 2# energy storage unit 2 stands still;
the 2# energy storage switch 4 is closed, the energy storage bus-tie switch 7 is closed, the 1# grid-connected switch 8 is closed, and the 1# energy storage switch 3 is opened. The 2# energy storage unit 2 and the 1# generating set 14 jointly operate, and the 1# energy storage unit 1 stands still.
The single energy storage unit and the single unit are operated in a combined mode, and the other energy storage unit stands still.
(3) Aiming at the condition that two units participate in frequency modulation at the same time:
the energy storage switch 1# 3 is closed, the grid-connected switch 1# 8 is closed, the energy storage bus-tie switch 7 is opened, the energy storage switch 2# 4 is closed, and the grid-connected switch 2# 9 is closed. The 1# energy storage unit 1 and the 1# generator set 14 are operated jointly, and the 2# energy storage unit 2 and the 2# generator set 15 are operated jointly.
The applicant of the present invention has made detailed description and description of the embodiments of the present invention with reference to the drawings, but those skilled in the art should understand that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only for helping the reader to better understand the spirit of the present invention, and not for limiting the protection scope of the present invention, on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the protection scope of the present invention.
Claims (5)
1. The utility model provides a can nimble energy storage frequency modulation system who disposes which characterized in that:
the system comprises a 1# energy storage unit, a 2# energy storage unit, a 1# energy storage switch, a 2# energy storage switch, an energy storage high-voltage bus A section, an energy storage high-voltage bus B section, an energy storage bus-tie switch, a 1# grid-connected switch, a 2# grid-connected switch, a 1# unit service bus, a 2# unit service bus, a 1# high-plant transformer, a 2# high-plant transformer, a 1# generator set and a 2# generator set;
the 1# energy storage unit is connected to the energy storage high-voltage bus A section through the 1# energy storage switch;
the 2# energy storage unit is connected to the B section of the energy storage high-voltage bus through the 2# energy storage switch;
the energy storage high-voltage bus A section is connected with the energy storage high-voltage bus B section through an energy storage bus coupler switch;
the section A of the energy storage high-voltage bus is connected to a No. 1 unit service bus through a No. 1 grid-connected switch;
the section B of the energy storage high-voltage bus is connected to a No. 2 machine set service bus through a No. 2 grid-connected switch;
the 1# unit service bus is connected with the 1# generator set through the 1# high station transformer;
and the # 2 unit service bus is connected with the # 2 generator set through the # 2 high station transformer.
2. A flexibly configurable energy storage frequency modulation system according to claim 1, wherein:
and the 1# unit service bus and the 2# unit service bus are unit service 6kV buses.
3. A flexibly configurable energy storage frequency modulation system according to claim 1, wherein:
the 1# energy storage unit and the 2# energy storage unit respectively comprise a transformer, a converter and a battery module.
4. A flexibly configurable energy storage frequency modulation system according to claim 1 or 3, wherein:
the No. 1 energy storage unit and the No. 2 energy storage unit are electrochemical energy storage batteries of the same type and the same specification.
5. A flexibly configurable energy storage frequency modulation system according to claim 1 or 3, wherein:
the No. 1 energy storage unit and the No. 2 energy storage unit are electrochemical energy storage batteries with different types or different specifications.
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| CN201921564599.6U CN210608563U (en) | 2019-09-19 | 2019-09-19 | Energy storage frequency modulation system capable of being configured flexibly |
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| CN201921564599.6U CN210608563U (en) | 2019-09-19 | 2019-09-19 | Energy storage frequency modulation system capable of being configured flexibly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949089A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Electrochemical energy storage commutation system and method with harmonic suppression capability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113949089A (en) * | 2021-10-14 | 2022-01-18 | 西安热工研究院有限公司 | Electrochemical energy storage commutation system and method with harmonic suppression capability |
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Address after: 101303 2nd floor, building 307, Guodian New Energy Institute, 9 Yingcai North 2nd Street, future science and Technology City, Changping District, Beijing Patentee after: Guoneng xinkong Internet Technology Co.,Ltd. Address before: 102209 2nd floor, building 307, Guodian New Energy Institute, 9 Yingcai North 2nd Street, future science and Technology City, Changping District, Beijing Patentee before: BEIJING HUADIAN TIANREN ELECTRIC POWER CONTROL TECHNOLOGY Co.,Ltd. |
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