CN112271745A - Energy storage system shared by power generation side and user side - Google Patents
Energy storage system shared by power generation side and user side Download PDFInfo
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- CN112271745A CN112271745A CN202011328819.2A CN202011328819A CN112271745A CN 112271745 A CN112271745 A CN 112271745A CN 202011328819 A CN202011328819 A CN 202011328819A CN 112271745 A CN112271745 A CN 112271745A
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- power
- energy storage
- circuit breaker
- unit
- storage system
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/18—Systems supporting electrical power generation, transmission or distribution using switches, relays or circuit breakers, e.g. intelligent electronic devices [IED]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to the technical field of power distribution and transmission, and discloses an energy storage system shared by a power generation side and a user side, which comprises a power generation unit, a power plant main transformer unit, a power grid, a power consumption and transformation unit of the power plant and an energy storage unit, wherein the power generation unit respectively supplies power to a primary side of the power plant main transformer unit and a primary side of the power consumption and transformation unit of the power plant through a first circuit breaker, a secondary side of the power plant main transformer unit respectively supplies power to a user load and the power grid, the secondary side of the power consumption and transformation unit of the power plant charges the energy storage unit through a second circuit breaker, the secondary side of the power plant power consumption and transformation unit supplies power to the power consumption load of the power plant through a fourth circuit breaker, the energy storage unit supplies power to the user load through a third circuit breaker, the energy storage unit supplies power to the power consumption load of the power plant, the overall deployment cost is reduced.
Description
Technical Field
The invention relates to the technical field of power distribution and transmission, in particular to an energy storage system shared by a power generation side and a user side.
Background
At present, an energy storage system used in each link in a power distribution and transmission system is independently assembled, for example, an energy storage system installed on a photovoltaic power generation side and a wind power generation side is an auxiliary energy storage system on the power generation side; the energy storage system that power consumption unit installed is user side energy storage system, and the energy storage system that the distribution network transformer substation installed is electric wire netting side energy storage system, and holistic installation cost is high, in addition because every energy storage system all is the exclusive use, in the crest of electric quantity use and trough time quantum, can not carry out reasonable allotment to every energy storage system, can not supply power to corresponding load according to demand separately, and then leads to energy storage unit's power utilization not high.
Disclosure of Invention
In view of the defects of the background art, the invention provides an energy storage system shared by a power generation side and a user side, and aims to solve the technical problems that the energy storage systems in the power distribution and transmission system in the prior art are respectively established in power generation, power distribution and power utilization links, the installation cost is high, and the power utilization rate of the energy storage systems is not high because each energy storage system is independently established.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an energy storage system that electricity generation side and user side are shared, including the power generation unit, power plant owner becomes the unit, the electric wire netting, power plant electricity consumption power transformation unit and energy storage unit, the power generation unit is through the power supply that once inclines of first circuit breaker to power plant owner becomes the unit and power plant electricity consumption power transformation unit once, power plant owner becomes the secondary side of unit and supplies power to user load and electric wire netting respectively, power plant electricity consumption power transformation unit's secondary side charges to the energy storage unit through the second circuit breaker, power plant electricity consumption power transformation unit's secondary side passes through the fourth circuit breaker and supplies power to power plant electricity load, the energy storage unit supplies power to user load through the third circuit breaker, the energy storage unit supplies power to power plant electricity consumption load through the fifth relay, fourth circuit breaker and fifth circuit breaker.
As a further technical scheme, the main control module of the power generation unit and the main control module of the energy storage unit are in communication connection with a network dispatching center through a remote terminal.
Further, the power distribution flow of the energy storage system is as follows: when the grid dispatching center sends a frequency modulation command to the main control module of the power generation unit and the main control module of the energy storage unit, namely the trough time period of the power grid during power utilization, the energy storage system is switched to a first working mode to operate, and when the energy storage system operates in the first working mode, the main control module of the power generation unit drives a first circuit breaker to be closed, a second circuit breaker to be closed, a third circuit breaker to be opened, a fourth circuit breaker to be opened and a fifth circuit breaker to be closed;
when the grid dispatching center sends a frequency modulation stopping command to the main control module of the power generation unit and the main control module of the energy storage unit, namely the peak time period of the power grid during power utilization, the energy storage unit is switched to a second working mode to operate, and when the energy storage system operates in the second working mode, the first circuit breaker is closed, the second circuit breaker is opened, the third circuit breaker is closed, the fourth circuit breaker is opened, and the fifth circuit breaker is closed.
Optionally, the energy storage unit switches between the first operation mode and the second operation mode.
Compared with the prior art, the invention has the beneficial effects that: firstly, the power generation side and the user side in the power distribution system share the same energy storage system, so that the installation quantity of the energy storage systems in the power distribution and transmission system is reduced, and the overall deployment cost is reduced; in addition, in the power consumption peak period, the energy storage unit is charged, so that the current transmitted to the power grid by the power generation unit is prevented from being overlarge, and the power transmitted to the power grid by the power generation unit is stable and cannot impact the power grid; during the peak period of power utilization, the energy storage unit supplies power to the user load, so that the operating pressure of a power grid can be effectively relieved, and the power utilization efficiency of the energy storage unit is improved.
Drawings
The invention has the following drawings:
FIG. 1 is a block diagram of an embodiment of an energy storage unit;
FIG. 2 is a schematic diagram of the connection between the grid center and the power generation unit and the energy storage unit in this embodiment;
fig. 3 is a schematic diagram of interlocking the second circuit breaker and the third circuit breaker in the embodiment.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1-2, an energy storage system shared by a power generation side and a user side comprises a power generation unit, a main power plant unit, a power grid, a power transformation unit for power plant and an energy storage unit, wherein the power generation unit supplies power to a primary side of the main power plant unit and a primary side of the power transformation unit for power plant through a first circuit breaker QF1, a secondary side of the main power plant unit supplies power to a user load and the power grid, a secondary side of the power transformation unit for power plant charges the energy storage unit through a second circuit breaker QF2, a secondary side of the power transformation unit for power plant supplies power to the power load for power plant through a fourth circuit breaker QF4, the energy storage unit supplies power to the user load through a third circuit breaker QF3, the energy storage unit supplies power to the power load for power plant through a fifth relay QF5, the fourth circuit breaker QF4 and a fifth circuit breaker QF5 are interlocked, the second circuit breaker 2 and a third circuit breaker 493 2 are interlocked, the second circuit breaker QF2 and, wherein V + is a power supply positive electrode, V-is a power supply negative electrode, KM2 is a control coil of a second breaker QF2, KM3 is a control coil of a third breaker QF3, K2 is a normally closed contact of a second breaker QF2, K3 is a normally closed contact of a third breaker K3, and only one of the second breaker QF2 and the third breaker QF3 is switched on when the second breaker QF2 and the third breaker QF3 are interlocked.
As a further technical scheme, a main control module of the power generation unit and a main control module of the energy storage unit are in communication connection with a network dispatching center through a Remote Terminal Unit (RTU).
Further, the power distribution flow of the energy storage system is as follows: when the grid dispatching center sends a frequency modulation command to the master control module of the power generation unit and the master control module of the energy storage unit, namely the power grid is in a trough time period of power utilization, the energy storage system is switched to a first working mode to operate, and when the energy storage system operates in the first working mode, the master control module of the power generation unit drives a first circuit breaker QF1 to be closed, a second circuit breaker QF2 to be closed, a third circuit breaker QF3 to be opened, a fourth circuit breaker QF4 to be opened, and a fifth circuit breaker QF5 to be closed; at the moment, the power generation unit charges the energy storage unit, so that the phenomenon that the power current transmitted to the power grid by the power generation unit is too large when the power grid runs to a trough can be avoided, and the power transmitted to the power grid by the power generation unit is stable and cannot impact the power grid.
When the grid dispatching center sends a frequency modulation stopping command to the main control module of the power generation unit and the main control module of the energy storage unit, namely, the power grid is in a peak time period of power utilization, the energy storage unit is switched to a second working mode to operate, when the energy storage system operates in the second working mode, the first circuit breaker QF1 is closed, the second circuit breaker QF2 is disconnected, the third circuit breaker QF3 is closed, the fourth circuit breaker QF4 is disconnected, and the fifth circuit breaker QF5 is closed, at the moment, the energy storage unit supplies power to a user load, the operating pressure of the power grid can be effectively relieved, and the power utilization efficiency of the energy storage unit.
Optionally, the energy storage unit switches between the first operation mode and the second operation mode.
Compared with the prior art, the invention has the beneficial effects that: firstly, the power generation side and the user side in the power distribution system share the same energy storage system, so that the installation quantity of the energy storage systems in the power distribution and transmission system is reduced, and the overall deployment cost is reduced; in addition, in the power consumption peak period, the energy storage unit is charged, so that the current of a power supply transmitted to the power grid by the power generation unit can be prevented from being overlarge, and the power transmitted to the power grid by the power generation unit is stable and cannot impact the power grid; during the peak period of power utilization, the energy storage unit supplies power to the user load, so that the operating pressure of a power grid can be effectively relieved, and the power utilization efficiency of the energy storage unit is improved.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. An energy storage system that electricity generation side and user side share characterized in that: including power generation unit, power plant main transformer unit, electric wire netting, power consumption power transformation unit and energy storage unit for power plant, power generation unit is through first circuit breaker respectively to power plant main transformer unit once side and power plant power consumption power transformation unit once side supply, power plant main transformer unit's secondary side is respectively to user load and electric wire netting power supply, power plant power consumption power transformation unit's secondary side charges to energy storage unit through the second circuit breaker, power plant power consumption power transformation unit's secondary side passes through the fourth circuit breaker and supplies power to power plant power consumption load, energy storage unit passes through the third circuit breaker and supplies power to user load, energy storage unit passes through the power consumption load power of fifth relay to power plant, fourth circuit breaker and fifth circuit breaker interlocking, second circuit breaker and third circuit breaker interlocking.
2. A power generation-side and customer-side common energy storage system according to claim 1, wherein: and the master control module of the power generation unit and the master control module of the energy storage unit are in communication connection with the network dispatching center through a remote terminal.
3. A power generation-side and customer-side common energy storage system according to claim 2, wherein: the power distribution process of the energy storage system is as follows: when a network dispatching center sends a frequency modulation command to a main control module of the power generation unit and a main control module of the energy storage unit, the energy storage system is switched to a first working mode to operate, and when the energy storage system operates in the first working mode, the main control module of the power generation unit drives a first circuit breaker to be closed, a second circuit breaker to be closed, a third circuit breaker to be opened, a fourth circuit breaker to be opened and a fifth circuit breaker to be closed; when the network dispatching center sends the stop frequency modulation command to the main control module of the power generation unit and the main control module of the energy storage unit, the energy storage unit is switched to the second working mode to operate, and when the energy storage system operates in the second working mode, the first circuit breaker is closed, the second circuit breaker is disconnected, the third circuit breaker is closed, the fourth circuit breaker is disconnected, and the fifth circuit breaker is closed.
4. A power generation-side and customer-side common energy storage system according to claim 3, wherein: the energy storage unit switches between a first working mode and a second working mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011328819.2A CN112271745A (en) | 2020-11-24 | 2020-11-24 | Energy storage system shared by power generation side and user side |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011328819.2A CN112271745A (en) | 2020-11-24 | 2020-11-24 | Energy storage system shared by power generation side and user side |
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| CN112271745A true CN112271745A (en) | 2021-01-26 |
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| CN202011328819.2A Pending CN112271745A (en) | 2020-11-24 | 2020-11-24 | Energy storage system shared by power generation side and user side |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821431A (en) * | 2021-02-26 | 2021-05-18 | 丛维民 | Power supply system and control method thereof |
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2020
- 2020-11-24 CN CN202011328819.2A patent/CN112271745A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821431A (en) * | 2021-02-26 | 2021-05-18 | 丛维民 | Power supply system and control method thereof |
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