CN212969072U - Isolated microgrid integrated device containing energy storage and distributed energy - Google Patents
Isolated microgrid integrated device containing energy storage and distributed energy Download PDFInfo
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- CN212969072U CN212969072U CN202022000458.0U CN202022000458U CN212969072U CN 212969072 U CN212969072 U CN 212969072U CN 202022000458 U CN202022000458 U CN 202022000458U CN 212969072 U CN212969072 U CN 212969072U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model provides an isolated microgrid integrated device containing energy storage and distributed energy, which comprises a voltage stabilizer, a methane power generation device, a hydroelectric power device, a photovoltaic off-grid inverter, a dual-power transfer switch, a wind power grid-connected inverter and a fan; the methane power generation is connected with a 220V power supply, the hydropower is connected with the 220V power supply through a connected voltage stabilizer, an alternating current input end and an alternating current output end are respectively arranged at two ends of the photovoltaic off-grid inverter, the alternating current input end is connected with the 220V power supply, the alternating current output end is connected with a double-power-supply changeover switch wire, and the alternating current output end is also driven to be provided with a load; the dual-power switch is sequentially connected with a wind power grid-connected inverter and a fan in parallel; and a photovoltaic panel and an energy storage battery are also arranged on the photovoltaic off-grid inverter. The utility model discloses with multiple energy parallel operation simultaneously in the isolated microgrid, the load is used on the one hand to the electric power of its production, and on the other hand provides energy storage battery and charges, when the energy breaks down and can't provide electric power, provides electric power by energy storage battery and uses for the load.
Description
Technical Field
The utility model belongs to the technical field of the integration. In particular to an isolated microgrid integrated device containing energy storage and distributed energy.
Background
In the prior art, an isolated microgrid is formed by integrated distributed energy sources (wind power and photovoltaic power), an energy storage battery, an energy conversion device, a protection device and the like, and the power generated by the microgrid is used for providing a load. However, the existing technical scheme is often used for large-scale application scenes, namely large-scale industrial park equipment, the construction cost is high, and the equipment cannot be used in small-scale application scenes such as family districts, plantations, pastures and small-scale industrial parks; and the existing technical scheme only relates to integration of wind power, photovoltaic power and energy storage batteries, and the maximum utilization of energy can not be realized when other types of energy such as hydroelectric power or biogas power are not integrated, and the complementation among various energy sources can not be realized. The technology realizes the complementation of various energy sources, thereby realizing the maximum utilization of the energy sources.
Disclosure of Invention
To the weak point among the prior art, the utility model provides an isolated microgrid integrated device who contains energy storage and distributed energy. The utility model has the characteristics of multiple energy is complementary, has set up the isolated microgrid that contains energy storage and distributed energy to reduce the construction cost, satisfy various small-scale scenes and use.
In order to achieve the above purpose, the utility model discloses technical scheme as follows:
the isolated microgrid integrated device containing the energy storage and distributed energy comprises a voltage stabilizer, a methane power generation device, a hydroelectric device, a photovoltaic off-grid inverter, a dual-power-supply changeover switch, a wind power grid-connected inverter and a fan; the device comprises a methane power generation device, a photovoltaic off-grid inverter, a 220V power supply, a voltage stabilizer, a double-power-supply switching line and a double-power-supply switching line, wherein the methane power generation device is connected with the 220V power supply, the hydropower is connected with the 220V power supply through the connected voltage stabilizer, an alternating current input end and an alternating current output end are respectively arranged at two ends of the photovoltaic off-grid inverter, the alternating current input end is connected with the 220; the dual-power switch is sequentially connected with a wind power grid-connected inverter and a fan in parallel; and a photovoltaic panel and an energy storage battery are also arranged on the photovoltaic off-grid inverter.
Furthermore, the dual-power-supply change-over switch can be replaced by using a bidirectional energy storage converter or a synchronous parallel device.
Has the advantages that: the utility model provides an isolated microgrid integrated device who contains energy storage and distributed energy, at the output voltage who guarantees each energy, frequency, phase sequence, set for biogas generating set output voltage under the unanimous condition of phase place and be the benchmark value, provide the condition for other energy side by side operation, the stabilizer of addding can avoid the great voltage of small-size hydraulic generator output fluctuation range, the photovoltaic that uses is from the net dc-to-ac converter can guarantee to run side by side with other energy and provide the function of charging for energy storage battery, and net type wind-powered electricity generation dc-to-ac converter can insert the microgrid with wind-powered electricity energy, the isolated microgrid integrated technology of the distributed energy of whole energy storage moves in order, energy storage convenient and fast. The utility model discloses can realize the complementation between the multiple energy, real establishment contain the isolated microgrid of energy storage and distributed energy, this technique has reduced the construction cost simultaneously, satisfies the application of all kinds of small type scenes, for example family's district, plantation, pasture and small-size industry garden have brought the facility for small-size use scene.
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Fig. 1 is a system structure diagram of the technical solution of the present invention.
Detailed Description
The present invention is described below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.
An isolated microgrid integrated device containing energy storage and distributed energy sources is shown in fig. 1 and comprises a voltage stabilizer, a methane power generation device, a hydroelectric device, a photovoltaic off-grid inverter, a dual-power-supply changeover switch, a wind power grid-connected inverter and a fan; the device comprises a biogas power generation device, a 220V power supply, a photovoltaic off-grid inverter, a double-power-supply switching switch line and a double-power-supply switching switch line, wherein the biogas power generation device is connected with the 220V power supply, the hydroelectric power generation device is connected with the 220V; the dual-power switch is sequentially connected with a wind power grid-connected inverter and a fan in parallel; the photovoltaic off-grid inverter is also provided with a photovoltaic panel and an energy storage battery;
the core configuration mode of the isolated microgrid integration technology containing the energy storage and the distributed energy comprises the following steps:
firstly, setting the output voltage of a biogas generator set as a reference value of 220V, wherein the reference value is used as a basic condition for parallel operation of other energy sources;
secondly, a voltage stabilizer or a synchronous parallel device is additionally arranged in the system of the scheme, so that the output voltage of the hydropower station reaches the condition of parallel operation;
then, an alternating current input interface is additionally arranged at the photovoltaic off-grid inverter, and the photovoltaic off-grid inverter is not connected with commercial power, so that the photovoltaic off-grid inverter can be ensured to run in parallel with other energy sources and charge an energy storage battery;
finally, a double-power-supply changeover switch is additionally arranged between the photovoltaic off-grid inverter and the wind power grid-connected inverter, when the hydroelectric power and the methane power fail simultaneously, the working voltage of the wind power grid-connected inverter is provided by an energy-storage output power supply, and when the hydroelectric power and the methane power recover to be normal, the working voltage of the wind power grid-connected inverter is provided by the hydroelectric power or the methane power, so that the power supply among a plurality of energy sources can be replaced and supplemented.
The dual power transfer switch can also be replaced by using a bidirectional energy storage converter or a synchronous parallel device.
Furthermore, the specific configuration operation method of the isolated microgrid integrated device containing the energy storage and the distributed energy comprises the following steps:
step 1: firstly, starting a biogas generator set, detecting the output voltage and frequency of the generator set, setting the detected voltage as 220V and the detected frequency as 50Hz, and setting the two values as reference values of the isolated microgrid;
step 2: starting the hydroelectric generating set, detecting the output voltage and frequency of the hydroelectric generating set, wherein the output voltage is influenced by the water flow, and the detected output voltage is 212V and the detected frequency is 50 Hz; the output voltage of the power generation device deviates from the reference value and cannot meet the parallel operation condition with the biogas generator set, therefore, a stabilizer is put into the power generation device to stabilize the output voltage at 220V, the parallel operation condition is achieved, a circuit breaker is closed, and the biogas generator set and the hydroelectric generator set operate in parallel;
and step 3: the energy storage battery is connected into the photovoltaic off-grid inverter, and a front-end circuit breaker is disconnected before connection, so that the photovoltaic off-grid inverter is prevented from being damaged by wiring errors;
step 4; connecting the photovoltaic panel into a photovoltaic off-grid inverter: before connection, a front-end circuit breaker is disconnected to prevent a wiring error from damaging the photovoltaic off-grid inverter;
and 5: the method comprises the following steps that alternating currents generated by a biogas generator set and a hydroelectric generator set are connected to an alternating current input end of a photovoltaic off-grid inverter, wherein the rated voltage range of the alternating current input voltage of the photovoltaic off-grid inverter is 200-230V, and the connection condition is met; switching on an alternating current input circuit breaker, starting the photovoltaic off-grid inverter to work, and switching on an energy storage battery end circuit breaker and a photovoltaic panel end circuit breaker respectively at the moment; checking the working conditions of the energy storage battery and the photovoltaic panel through a photovoltaic off-grid inverter display panel, and checking the output voltage and frequency of the photovoltaic off-grid inverter, wherein the output voltage is 220V, the frequency is 50Hz, and the parallel operation condition is met;
step 6: connecting alternating current generated by a fan into a fan grid-connected inverter;
and 7: the method comprises the following steps of (1) connecting alternating currents generated by a methane generator set and a hydroelectric generator set to an alternating current input end of a fan grid-connected inverter: the rated voltage range of the alternating current input voltage of the fan grid-connected inverter is 200V-230V, and the fan grid-connected inverter accords with access conditions; the circuit breaker is closed, the fan grid-connected inverter starts to work, the output voltage and the frequency of the fan grid-connected inverter are checked through a display panel of the fan grid-connected inverter, the output voltage is 220V, the frequency is 50Hz, and parallel operation conditions are met;
and 8: because the fan grid-connected inverter is of a grid-connected type, the fan grid-connected inverter stops working at the moment when the methane generator set and the hydroelectric generator set do not run simultaneously; in order to avoid the situation, the alternating current input end of the fan grid-connected inverter is simultaneously connected to the alternating current output end of the photovoltaic off-grid inverter, and the circuit breaker adopts a double-power-supply change-over switch; when the biogas generator set and the hydroelectric generator set are in an inoperative state at the same time, the working voltage of the fan grid-connected inverter is provided by the photovoltaic off-grid inverter, so that the normal work of the fan grid-connected inverter is ensured;
and step 9: setting the working mode of the photovoltaic off-grid inverter as a mains supply priority mode:
the public power grid (the power generated by the methane unit, the water power unit or the wind power unit) preferentially supplies power to the load;
when a public power grid (power generated by a methane unit, a water unit or a wind power unit) is unavailable, the photovoltaic panel and the energy storage battery supply power to a load;
step 10: and (3) integral testing of an isolated microgrid system:
a. when all the circuit breakers are closed, the load works normally, and the energy storage battery is in a charging state;
b. simultaneously disconnecting the biogas unit and the hydraulic unit, normally operating the fan inverter and the photovoltaic inverter, normally operating the load at the moment, and charging the energy storage battery;
c. and meanwhile, the biogas unit, the hydraulic unit and the wind power unit are disconnected, and the load is powered by the photovoltaic panel and the energy storage battery.
Claims (2)
1. Contain isolated microgrid integrated device of energy storage and distributed energy, its characterized in that: the system comprises a voltage stabilizer, a methane power generation device, a hydroelectric device, a photovoltaic off-grid inverter, a dual-power-supply changeover switch, a wind power grid-connected inverter and a fan; the device comprises a methane power generation device, a photovoltaic off-grid inverter, a 220V power supply, a voltage stabilizer, a double-power-supply switching line and a double-power-supply switching line, wherein the methane power generation device is connected with the 220V power supply, the hydropower is connected with the 220V power supply through the connected voltage stabilizer, an alternating current input end and an alternating current output end are respectively arranged at two ends of the photovoltaic off-grid inverter, the alternating current input end is connected with the 220; the dual-power switch is sequentially connected with a wind power grid-connected inverter and a fan in parallel; and a photovoltaic panel and an energy storage battery are also arranged on the photovoltaic off-grid inverter.
2. The isolated microgrid integrated apparatus including stored energy and distributed energy sources of claim 1, wherein the dual power transfer switch also enables replacement by using a bidirectional energy storage converter or a synchronous parallel device.
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| CN202022000458.0U CN212969072U (en) | 2020-09-14 | 2020-09-14 | Isolated microgrid integrated device containing energy storage and distributed energy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050610A (en) * | 2021-11-23 | 2022-02-15 | 西安热工研究院有限公司 | Distributed photovoltaic power generation energy step adjusting device arranged in wind power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050610A (en) * | 2021-11-23 | 2022-02-15 | 西安热工研究院有限公司 | Distributed photovoltaic power generation energy step adjusting device arranged in wind power plant |
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