CN111262270A - Light, diesel and storage hybrid power generation system - Google Patents

Light, diesel and storage hybrid power generation system Download PDF

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Publication number
CN111262270A
CN111262270A CN201911388023.3A CN201911388023A CN111262270A CN 111262270 A CN111262270 A CN 111262270A CN 201911388023 A CN201911388023 A CN 201911388023A CN 111262270 A CN111262270 A CN 111262270A
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photovoltaic
power generation
diesel
storage
energy
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Inventor
芦川
刘飞
胡瑞林
周金木
李志翔
平原
张守和
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Cggc Un Power Co ltd
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Cggc Un Power Co ltd
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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
    • 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
    • H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
    • 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
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • 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
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a light-diesel-storage hybrid power generation system, which comprises a photovoltaic power generation system, a diesel power generation controller and a diesel generator set, wherein the diesel generator set comprises the following components: the photovoltaic power generation system comprises a photovoltaic module and array, a photovoltaic support, a photovoltaic controller, a storage battery pack, a bidirectional energy storage converter and an inverter, wherein the photovoltaic support is connected with the photovoltaic module, the photovoltaic controller is connected with the photovoltaic module and the array, the photovoltaic module and the array are connected with the inverter, the storage battery pack is connected with the photovoltaic controller, the storage battery pack is connected with the bidirectional energy storage converter, a diesel generator set is connected with a diesel generator controller, the inverter and the diesel generator controller are connected with a microgrid, and the photovoltaic module and the array cooperate with each other to complete a diesel-solar storage power generation task. The invention has the advantages that: the method has the advantages that the recombination optimization is carried out according to the characteristics of different forms of energy structures, the fluctuation of the photovoltaic power generation power can be balanced, the electric energy can be stored when the light resources are sufficient, the power supply time is prolonged, and the electric energy quality of a system is improved.

Description

Light, diesel and storage hybrid power generation system
Technical Field
The invention relates to the technical field of power generation, in particular to a light-diesel-storage hybrid power generation system.
Background
With the continuous development of global economy, the gradual increase of energy crisis and the increasing severity of air pollution, clean energy and renewable energy are greatly valued. Many countries begin to set carbon emission standards with the aim of reducing energy consumption, reducing greenhouse gas emissions and encouraging the development of clean energy. Although the conventional fossil energy power generation technology is mature, the single machine capacity is large, and the operation stability is high, the development of the power generation technology is severely restricted by the defects of low energy utilization efficiency, poor unit peak regulation capability, pollutant discharge amount and the like.
In recent years, with the price reduction of photovoltaic power generation equipment such as photovoltaic modules, energy storage batteries and inverters, the cost of a photovoltaic power generation system is reduced year by year. The photovoltaic power generation has the advantages of rich resources, environmental friendliness and the like, but the solar energy has volatility, and the quality of electric energy is difficult to guarantee by pure photovoltaic complementation.
In some industrial plants, data centers or remote areas and islands far from large power grids, which have high requirements on power supply, diesel generators are commonly used as standby power supplies or main power supplies for reliable power supply of production, operation and living facilities. Under the current situation that the price of diesel tends to rise, a diesel photovoltaic off-grid power generation system gradually enters the visual field of people, and in an independent micro-grid, a diesel power generation system is generally required to be configured so as to improve the power supply reliability of the independent micro-grid. The diesel power generation system can be used as a main power supply to support the voltage frequency of the system or used as a standby power supply to make up for the power shortage. And the diesel generating set and the photovoltaic are combined and utilized, the power generation characteristics of the diesel generating set and the photovoltaic are fully utilized to form complementation, and the power supply benefit is improved. Practice proves that the oil-light hybrid power generation system formed by the diesel generating set and the photovoltaic system has better economical efficiency.
Disclosure of Invention
In order to solve the problems, the invention designs a light-diesel-storage hybrid power generation system, which is recombined and optimized according to the characteristics of different forms of energy structures, and simultaneously has the advantages of rich resources, environmental friendliness and the like for photovoltaic power generation, but solar energy has volatility, pure light energy complementation is difficult to ensure the quality of electric energy, an energy storage unit is added, and natural gas distributed type is used as stable energy supply, so that the fluctuation of photovoltaic power generation power can be balanced, the electric energy can be stored when the light resources are sufficient, the power supply time is prolonged, and the quality of the electric energy of the system is improved.
The technical scheme of the invention is as follows:
the utility model provides a light firewood stores up hybrid power generation system, includes photovoltaic power generation system, and the controller is sent out to the firewood, diesel generating set: the photovoltaic power generation system comprises a photovoltaic module and an array, a photovoltaic support, a photovoltaic controller, a storage battery pack, a bidirectional energy storage converter and an inverter, wherein the photovoltaic support is connected with the photovoltaic module, the photovoltaic controller is connected with the photovoltaic module and the array, the photovoltaic module and the array are connected with the inverter, the storage battery pack is connected with the photovoltaic controller, the storage battery pack is connected with the bidirectional energy storage converter, a diesel generator set is connected with a diesel generator controller, the inverter, the bidirectional energy storage converter and the diesel generator controller are all connected with a microgrid, and the photovoltaic module, the bidirectional energy storage converter and the microgrid are cooperatively matched to complete a diesel storage power generation task.
Furthermore, the light diesel energy storage and power generation energy management system and the system controller are used for collecting the light diesel energy storage and power generation energy
The photovoltaic power generation system energy output and microgrid load energy utilization preliminary relation obtains the light diesel oil storage power generation energy shortage, the energy output of the energy storage device is adjusted according to the energy shortage, preliminary photovoltaic load balance is achieved, and the power generation system can be more stable by combining the output of the diesel generating set.
Further, the photovoltaic prediction sensor, the light diesel storage power generation energy management system and the system controller are included; the photovoltaic prediction sensor is mainly based on a multivariate discriminant algorithm and an optimized ACO-SVM model; and analyzing the input and output attributes of the multivariate dynamic matrix by using a multivariate discriminant algorithm, optimizing the discriminant parameter C and the kernel parameter mu of the SVM model with the radial basis kernel function by using ACO based on the output attributes of the multivariate dynamic matrix, and constructing a photovoltaic prediction ACO-SVM combined prediction model.
Furthermore, the controller acquisition system samples characteristic data of the light firewood storage module, the light firewood storage power generation energy management system adjusts the signal acquisition range of the prediction model variable, characteristic signal extraction is carried out on output signals through a signal processing module of the photovoltaic prediction sensor to form a dynamic matrix of a certain sample, factor attributes of each dynamic matrix are analyzed by adopting a multivariate statistical discriminant algorithm, and input and output variables of the photovoltaic prediction sensor are confirmed.
Furthermore, the energy storage device is a flywheel-storage battery composite energy storage system, and comprises a storage battery energy storage module and a flywheel energy storage module, wherein the modules are connected with a multi-energy management system, and the flywheel-storage battery composite energy storage system adopts layered control to complete multi-energy storage regulation and control.
The invention has the advantages that:
(1) according to the complementary characteristics of different primary energy sources, good economic value and environmental protection value can be achieved through reasonable coordination in the production process of secondary energy sources;
(2) by adopting an advanced load prediction system, the supply of an energy system can be adjusted, so that energy supply can be provided for users more economically and reasonably.
(3) The invention is the practical verification of the superiority of the oil-light hybrid power generation system, and on the basis, the oil-light hybrid power generation systems with different capacities are flexibly configured according to different project requirements;
the invention is further illustrated by the following figures and examples.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram of an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be practiced otherwise than as specifically described and similar modifications can be made by those skilled in the art without departing from the spirit of the invention, which is therefore not limited to the specific embodiments disclosed below,
in describing the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may indicate, either explicitly or implicitly, the number of technical features indicated. In the description of the present invention, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically or electrically; either directly or indirectly through intervening media, either internally or in any combination, unless otherwise expressly stated. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply indicate that the first feature is taller than the second feature. The first feature being "under", "beneath" and "under" the second feature
"below" may be directly or obliquely below a first feature with respect to a second feature, or merely stating that the first feature is at a lesser elevation than the second feature.
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Embodiment 1, as shown in fig. 1, a light-diesel-storage hybrid power generation system includes a photovoltaic power generation system, a diesel-fuel generation controller, a diesel-fuel generator set: the photovoltaic power generation system comprises a photovoltaic module and an array, a photovoltaic support, a photovoltaic controller, a storage battery pack, a bidirectional energy storage converter and an inverter, wherein the photovoltaic support is connected with the photovoltaic module, the photovoltaic controller is connected with the photovoltaic module and the array, the photovoltaic module and the array are connected with the inverter, the storage battery pack is connected with the photovoltaic controller, the storage battery pack is connected with the bidirectional energy storage converter, a diesel generator set is connected with a diesel generator controller, the inverter, the bidirectional energy storage converter and the diesel generator controller are all connected with a microgrid, and the photovoltaic module, the bidirectional energy storage converter and the microgrid are cooperatively matched to complete a diesel storage power generation task.
Embodiment 2, the photovoltaic prediction sensor and the multivariate statistical discriminant algorithm are specifically implemented in the following manner: the controller acquisition system samples characteristic data of the light firewood storage module to obtain photovoltaic historical data, predicted solar meteorological data and historical meteorological data; the light diesel storage power generation energy management system adjusts the signal acquisition range of the prediction model variable to obtain a similar day data set and photovoltaic historical data, and the signal processing module of the photovoltaic prediction sensor is used for carrying out comparisonExtracting characteristic signals of output signals (similar day data sets: temperature and air quality index in the same season day data sets) to form dynamic matrixes of a certain sample, analyzing factor attributes of each dynamic matrix by adopting a multivariate statistical discriminant algorithm, confirming input and output variables of a photovoltaic prediction sensor, extracting a position peak value of the photovoltaic prediction sensor through an acquisition and processing module of a light-diesel storage power generation energy management system, and simultaneously extracting the characteristics (temperature, rainfall, wind speed range, illumination duration, intensity, season weather type and thunder probability factor) of the similar day by the photovoltaic prediction sensor
Figure RE-DEST_PATH_IMAGE001
The peak values are sequentially combined into one
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Dimensional eigenvalue matrix, recorded as population
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After that, every new increase
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Characteristic quantity substitution of the top
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A characteristic quantity, forming a new
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Dimensional position matrix, denoted as population
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. By analogy, a multi-element same-dimension dynamic matrix is formed
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。
According to the output characteristics of the photovoltaic prediction sensor, the characteristic quantity of the photovoltaic prediction sensor is formed
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Dimensional space matrix obedience
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A metanormal distribution. The collected characteristic quantities are assumed to be recorded in sequence
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Wherein
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Then there is
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The above formula can give the overall
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Is a
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And (5) dynamic data matrix.
Two sets of sample matrices, each having similar days, are collected
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Dimensional sample matrix population
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And predicting the day
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Dimensional sample matrix population
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Calculating the total matrix of each group
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Mean vector of
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Covariance matrix
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And a whole body
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And in general
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Expected value of
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、
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And
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and
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and
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mahalanobis distance of
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And a discriminant function
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The method comprises the following steps:
matrix totality
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Mean vector of
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：
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To obtain a linear discriminant function
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Consider a multivariate
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Dimensional dynamic matrix
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To the sample matrix ensemble
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Square of the distance to the sample matrix population
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The difference of the squared distances of (a):
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it is known that
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，
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，
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Let us order
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Then
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The overall output attribute of each group of matrix can be judged according to the positive and negative of the discriminant function
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When the temperature of the water is higher than the set temperature,
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at this time, it should be judged
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Then the discriminant rule can be expressed as
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Thereby, it can determine the multiple elements at any time
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Input-output properties of the dimensional dynamic matrix, while varying
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And
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the value of (c) can adjust the timeliness accuracy of the photovoltaic input and output.
Respectively comparing the similar time data set, the photovoltaic historical data, the forecast solar meteorological data and the historical meteorological data: and substituting the historical power value, the highest temperature, the average temperature, the highest temperature quality index, the lowest air quality index, the average air quality index and the like into an ACO-SVM model, and calculating the photovoltaic power and the load prediction power by the ACO-SVM model.
The photovoltaic power generation has the advantages of rich resources, environmental friendliness and the like, and the photovoltaic power generation is combined with the diesel generator set for use, so that sufficient sunlight is fully exerted in the daytime, the power generation characteristics of the photovoltaic power generation and the diesel generator set are complementary, and the power supply benefit is improved. The photovoltaic power generation equipment comprises a photovoltaic module, a controller and an inverter; the photovoltaic module is respectively connected with the inverter and the energy storage device through the controller, when the illumination is strong in the daytime, the multi-energy management system can meet the requirement of an electric energy user, and the controller is connected with the inverter to store redundant energy to the energy storage device. When the illumination is not strong and the system is at night, the controller of the light diesel storage power generation energy management system is connected with the inverter, the controller is connected with the energy storage equipment end, and the energy storage equipment supplies power. Solar energy has volatility, and pure light energy is complementary to be difficult to guarantee the electric energy quality, consequently increases the energy storage unit, energy storage equipment is a flywheel-battery composite energy storage system, including battery energy storage module, flywheel energy storage module, the compound energy storage technology of pluralism has flywheel energy storage large capacity energy storage, battery quick response ability characteristics concurrently. The flywheel energy storage module mainly shares transient state or short-duration dynamic power compensation, and the storage battery can bear power compensation and energy regulation tasks with long time span. Meanwhile, natural gas is distributed to serve as stable energy supply, fluctuation of wind and light power generation power can be balanced, electric energy can be stored when wind and light resources are sufficient, power supply time is prolonged, and electric energy quality of a system is improved.
The photovoltaic array is a solar energy conversion system consisting of a plurality of photovoltaic modules according to a certain series-parallel connection relation; the photovoltaic controller is responsible for charging the storage battery pack after effectively converting and controlling direct current electric energy output by the photovoltaic array, and has the functions of MPPT tracking, storage battery charging protection, reverse connection protection, lightning protection, short circuit protection and the like; the off-grid inverter is used for converting direct current into alternating current, is generally integrated with a controller, has inversion and control functions, has the function of converting the direct current into alternating current energy meeting certain requirements, and has the functions of over-discharge protection, reverse connection protection, lightning protection, short circuit, overload protection and the like of a storage battery; the alternating current power distribution cabinet is provided with electric energy distribution, breaking protection, electric energy metering, alternating current lightning protection and grounding protection functional devices, so that the output electric energy of the inverter and the diesel engine set can be collected and output to one or more loads of the output loops for use, and the reliability of system power supply can be effectively ensured; the diesel generator set is used as a main power supply to supply power to a load and is used as a voltage and frequency source in a system, and the inverter tracks the operation of the diesel generator set to ensure the stability of the power supply of the system; the storage battery pack is mainly used for storing electric energy of a system surplus power meter, and can output the stored direct current electric energy to supply to a load for use through the inverter when the photovoltaic power generation and the diesel engine generating power are insufficient and in rainy days.
The system comprises an energy analysis side, an energy supply side and an energy demand side, and energy supply at the energy supply side can be effectively configured through analysis of the demand side, so that energy efficiency service energy users are better provided.

Claims (4)

1. The utility model provides a light firewood stores up hybrid power generation system which characterized in that: including photovoltaic power generation system, the controller is sent out to the firewood, diesel generating set: the photovoltaic power generation system comprises a photovoltaic module and an array, a photovoltaic support, a photovoltaic controller, a storage battery pack, a bidirectional energy storage converter and an inverter, wherein the photovoltaic support is connected with the photovoltaic module, the photovoltaic controller is connected with the photovoltaic module and the array, the photovoltaic module and the array are connected with the inverter, the storage battery pack is connected with the photovoltaic controller, the storage battery pack is connected with the bidirectional energy storage converter, a diesel generator set is connected with a diesel generator controller, the inverter, the bidirectional energy storage converter and the diesel generator controller are all connected with a microgrid, and the photovoltaic module, the bidirectional energy storage converter and the microgrid are cooperatively matched to complete a diesel storage power generation task.
2. The light-diesel-storage hybrid power generation system of claim 1, wherein: the photovoltaic power generation system energy output and microgrid load energy use preliminary relation is collected through the photovoltaic power generation system energy storage and generation energy management system and the system controller to obtain the photovoltaic power storage and generation energy shortage, the energy output of the energy storage device is adjusted according to the energy shortage, the photovoltaic load preliminary balance is realized, and the power generation system can be more stable by combining the output of the diesel generator set.
3. The light-diesel-storage hybrid power generation system of claim 1, wherein: the photovoltaic prediction sensor, the light diesel storage power generation energy management system and the system controller are included; the photovoltaic prediction sensor is mainly based on a multivariate discriminant algorithm and an optimized ACO-SVM model; and analyzing the input and output attributes of the multivariate dynamic matrix by using a multivariate discriminant algorithm, optimizing the discriminant parameter C and the kernel parameter mu of the SVM model with the radial basis kernel function by using ACO based on the output attributes of the multivariate dynamic matrix, and constructing a photovoltaic prediction ACO-SVM combined prediction model.
4. The light-diesel-storage hybrid power generation system disclosed by the claim 1 is characterized in that a photovoltaic prediction sensor is invented, and the photovoltaic prediction sensor comprises: the controller acquisition system samples characteristic data of the light diesel storage module, the light diesel storage power generation energy management system adjusts the signal acquisition range of the prediction model variable, characteristic signal extraction is carried out on output signals through a signal processing module of the photovoltaic prediction sensor to form a dynamic matrix of a certain sample, factor attributes of each dynamic matrix are analyzed through a multivariate statistical discriminant algorithm, and input and output variables of the photovoltaic prediction sensor are confirmed.
CN201911388023.3A 2020-04-16 2020-04-16 Light, diesel and storage hybrid power generation system Withdrawn CN111262270A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112600248A (en) * 2020-12-30 2021-04-02 葛洲坝能源重工有限公司 Light-diesel-storage composite power supply control method
CN113270883A (en) * 2021-06-21 2021-08-17 横店集团东磁股份有限公司 Photovoltaic electric energy storage system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112600248A (en) * 2020-12-30 2021-04-02 葛洲坝能源重工有限公司 Light-diesel-storage composite power supply control method
CN112600248B (en) * 2020-12-30 2022-07-29 葛洲坝能源重工有限公司 Light-diesel-storage composite power supply control method
CN113270883A (en) * 2021-06-21 2021-08-17 横店集团东磁股份有限公司 Photovoltaic electric energy storage system and method

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