CN109245160B - Light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation - Google Patents

Light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation Download PDF

Info

Publication number
CN109245160B
CN109245160B CN201811197464.0A CN201811197464A CN109245160B CN 109245160 B CN109245160 B CN 109245160B CN 201811197464 A CN201811197464 A CN 201811197464A CN 109245160 B CN109245160 B CN 109245160B
Authority
CN
China
Prior art keywords
grid
control
converter
battery
photovoltaic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811197464.0A
Other languages
Chinese (zh)
Other versions
CN109245160A (en
Inventor
郭宝甫
王卫星
刘志远
曹新慧
徐军
卢星海
岳帅
谢青松
苑军军
王法宁
陈玉玺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Xuji Group Co Ltd
Xuchang XJ Software Technology Co Ltd
State Grid Ningxia Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Xinjiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Xuji Group Co Ltd
Xuchang XJ Software Technology Co Ltd
State Grid Ningxia Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Xinjiang Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Xuji Group Co Ltd, Xuchang XJ Software Technology Co Ltd, State Grid Ningxia Electric Power Co Ltd, Economic and Technological Research Institute of State Grid Xinjiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201811197464.0A priority Critical patent/CN109245160B/en
Publication of CN109245160A publication Critical patent/CN109245160A/en
Application granted granted Critical
Publication of CN109245160B publication Critical patent/CN109245160B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H02J3/383
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for AC mains or AC distribution networks
    • H02J3/24Arrangements for preventing or reducing oscillations of power in networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明涉及一种平抑光伏功率波动的光储并网控制方法及装置。该方法包括以下步骤:1)采集光储混合微网系统的并网电压;2)当并网电压大于或等于第一设定值且小于或等于第二设定值时,判定处于正常并网模式,对DC/AC进行第一定电压控制,对光伏DC/DC进行MPPT控制,对电池DC/DC进行第一滤波平抑控制,对超级电容DC/DC进行热备控制;3)当并网电压低于第一设定值时,判定处于低电压并网模式,对DC/AC进行无功给定控制和限流控制,对光伏DC/DC进行限功率控制,对电池DC/DC进行热备控制,对超级电容DC/DC进行第二定电压控制。本发明对正常并网模式下和低电压并网模式下DC/AC、光伏DC/DC、电池DC/DC和超级电容DC/DC的精细化控制,有效地平抑了光储混合微网系统并网模式下的功率波动。

Figure 201811197464

The invention relates to a control method and device for grid-connected optical storage for smoothing photovoltaic power fluctuations. The method includes the following steps: 1) collecting the grid-connected voltage of the hybrid optical-storage microgrid system; 2) when the grid-connected voltage is greater than or equal to the first set value and less than or equal to the second set value, it is determined that the grid-connected voltage is in normal state In the mode, the first constant voltage control is performed on the DC/AC, the MPPT control is performed on the photovoltaic DC/DC, the first filter smoothing control is performed on the battery DC/DC, and the supercapacitor DC/DC is subjected to hot backup control; 3) When connected to the grid When the voltage is lower than the first set value, it is determined to be in low-voltage grid-connected mode, reactive power given control and current limiting control are performed on DC/AC, power limiting control is performed on photovoltaic DC/DC, and battery DC/DC is heated. Backup control, the second constant voltage control is performed on the super capacitor DC/DC. The present invention finely controls DC/AC, photovoltaic DC/DC, battery DC/DC and supercapacitor DC/DC in normal grid-connected mode and low-voltage grid-connected mode, effectively suppressing the failure of the hybrid optical-storage micro-grid system. Power fluctuations in mesh mode.

Figure 201811197464

Description

一种平抑光伏功率波动的光储并网控制方法及装置Optical storage grid-connected control method and device for smoothing photovoltaic power fluctuations

技术领域technical field

本发明属于光储并网控制技术领域,特别涉及一种平抑光伏功率波动的光储并网控制方法及装置。The invention belongs to the technical field of grid-connected control of optical storage, and particularly relates to a control method and device for grid-connected optical storage for smoothing photovoltaic power fluctuations.

背景技术Background technique

近些年,光伏、风电等新能源装机容量得到了前所未有的增长,但是,由于分布式发电的先天波动性、随机性、不可调度性,对电网稳定性造成了挑战,出现了并网电能质量差、消纳难等一系列问题,限制了分布式发电的高渗透率接入和有效利用。In recent years, the installed capacity of new energy sources such as photovoltaics and wind power has grown unprecedentedly. However, due to the inherent volatility, randomness, and undispatchability of distributed generation, it has created challenges to the stability of the power grid, and grid-connected power quality has emerged. A series of problems, such as poor distribution and difficult consumption, limit the high penetration rate access and effective utilization of distributed generation.

针对上述分布式能源发展中遇到的问题,储能给我们带来了曙光,储能在用电低谷时可以作为负荷进行充电,在用电高峰时可以作为电源进行放电,可有效平抑功率波动、削峰填谷,还可以参与电网的调频调压和需求响应,实现分布式发电的大规模高渗透率接入,支撑分布式发电及微网。In response to the above problems encountered in the development of distributed energy, energy storage has brought us the dawn. Energy storage can be used as a load to charge when electricity consumption is low, and can be used as a power source to discharge when electricity consumption peaks, which can effectively stabilize power fluctuations. It can also participate in the frequency and voltage regulation and demand response of the power grid, realize the large-scale and high-penetration access of distributed power generation, and support distributed power generation and microgrids.

光储混合微网系统包括由光伏发电系统和储能系统构成的直流供电系统和由DC/AC变换器构成的交流供电系统,储能系统包括电池系统和/或超级电容器系统。如申请公布号为CN103078340A的中国专利申请文件公开了包括光伏发电系统、电池系统、超级电容器系统系统和交流供电系统的光储混合微电网系统。然而,针对该光储混合微电网系统,该文件并未对混合微电网系统所处并网模式进行有效区分,也没有对蓄电池对应的直流/直流变换器、超级电容器对应的直流/直流变换器、光伏对应的直流/直流变换器和直流/交流变换器进行精细化控制,无法保证光储混合微网系统并网模式下电网的平稳运行。The hybrid solar-storage microgrid system includes a DC power supply system composed of a photovoltaic power generation system and an energy storage system and an AC power supply system composed of a DC/AC converter, and the energy storage system includes a battery system and/or a supercapacitor system. For example, the Chinese patent application document with the application publication number CN103078340A discloses a photovoltaic-storage hybrid microgrid system including a photovoltaic power generation system, a battery system, a supercapacitor system system and an AC power supply system. However, for this hybrid microgrid system, the document does not effectively distinguish the grid-connected mode in which the hybrid microgrid system is located, nor does it identify the DC/DC converters corresponding to batteries and the DC/DC converters corresponding to supercapacitors. , The DC/DC converters and DC/AC converters corresponding to photovoltaics are finely controlled, and the smooth operation of the power grid in the grid-connected mode of the photovoltaic-storage hybrid microgrid system cannot be guaranteed.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于提供一种平抑光伏功率波动的光储并网控制方法及装置,用于解决现有光储混合微网系统并网模式下电网波动较大的问题。The purpose of the present invention is to provide a photovoltaic power storage grid-connected control method and device for smoothing photovoltaic power fluctuations, which are used to solve the problem of large power grid fluctuations in the grid-connected mode of the existing photovoltaic-storage hybrid microgrid system.

为了解决上述技术问题,本发明的技术方案为:In order to solve the above-mentioned technical problems, the technical scheme of the present invention is:

本发明提供了一种平抑光伏功率波动的光储并网控制方法,该方法针对的光储混合微网系统包括光伏板、与光伏板连接的光伏DC/DC变换器、电池、与电池连接的电池DC/DC变换器、超级电容以及与超级电容连接的超级电容DC/DC变换器,光伏DC/DC变换器、电池DC/DC变换器和超级电容DC/DC变换器均通过DC/AC变换器用于连接交流电网,所述平抑光伏功率波动的光储并网控制方法包括以下步骤:1)采集光储混合微网系统的并网电压;2)当光储混合微网系统的并网电压大于或等于第一设定值且小于或等于第二设定值时,判定光储混合微网系统处于正常并网模式,对DC/AC变换器进行第一定电压控制,对光伏DC/DC变换器进行MPPT控制,对电池DC/DC变换器进行第一滤波平抑控制,对超级电容DC/DC变换器进行热备控制;3)当光储混合微网系统的并网电压低于第一设定值时,判定光储混合微网系统处于低电压并网模式,对DC/AC变换器进行无功给定控制和限流控制,对光伏DC/DC变换器进行限功率控制,对电池DC/DC变换器进行热备控制,对超级电容DC/DC变换器进行第二定电压控制。The invention provides a photovoltaic power storage grid-connected control method for stabilizing photovoltaic power fluctuations. The optical storage hybrid micro-grid system targeted by the method includes photovoltaic panels, photovoltaic DC/DC converters connected to the photovoltaic panels, batteries, and a battery connected to the batteries. Battery DC/DC converters, supercapacitors and supercapacitor DC/DC converters connected to supercapacitors, photovoltaic DC/DC converters, battery DC/DC converters and supercapacitor DC/DC converters all use DC/AC conversion The solar-storage grid-connected control method for smoothing photovoltaic power fluctuations includes the following steps: 1) collecting the grid-connected voltage of the hybrid photovoltaic-storage microgrid system; 2) when the grid-connected voltage of the hybrid photovoltaic-storage microgrid system When it is greater than or equal to the first set value and less than or equal to the second set value, it is determined that the hybrid optical-storage microgrid system is in the normal grid-connected mode, and the DC/AC converter is controlled at a first constant voltage, and the photovoltaic DC/DC The converter performs MPPT control, performs the first filtering and smoothing control for the battery DC/DC converter, and performs hot backup control for the supercapacitor DC/DC converter; 3) When the grid-connected voltage of the optical-storage hybrid microgrid system is lower than the first When the value is set, it is judged that the hybrid solar-storage microgrid system is in the low-voltage grid-connected mode, and the DC/AC converter is controlled by reactive power given control and current limit control, and the photovoltaic DC/DC converter is controlled by the power limit, and the battery The DC/DC converter performs hot standby control, and the second constant voltage control is performed on the supercapacitor DC/DC converter.

本发明方法的有益效果:实现了正常并网模式下低电压并网模式下对光储发电系统中DC/AC、光伏DC/DC、电池DC/DC和超级电容DC/DC的精细化控制,有效地平抑了光储混合微网系统并网模式下的功率波动。The beneficial effects of the method of the invention are as follows: the fine control of DC/AC, photovoltaic DC/DC, battery DC/DC and super capacitor DC/DC in the optical storage and power generation system in the low-voltage grid-connected mode in the normal grid-connected mode is realized, The power fluctuation in the grid-connected mode of the optical-storage hybrid microgrid system is effectively suppressed.

进一步的,当在并网模式下收到调度指令时,本发明还给出了对光储发电系统中DC/AC、光伏DC/DC、电池DC/DC和超级电容DC/DC的更加精细化控制,所述步骤2)中,若检测到调度指令,判定光储混合微网系统处于调度并网模式,对DC/AC变换器进行调度运行控制,对光伏DC/DC变换器进行MPPT控制,对电池DC/DC变换器进行第三定电压控制,对超级电容DC/DC变换器进行第二滤波平抑控制。Further, when the scheduling command is received in the grid-connected mode, the present invention also provides more refined DC/AC, photovoltaic DC/DC, battery DC/DC and super capacitor DC/DC in the photovoltaic power generation system. control, in the step 2), if a scheduling instruction is detected, it is determined that the hybrid optical-storage microgrid system is in the scheduling grid-connected mode, the DC/AC converter is scheduled and operated, and the photovoltaic DC/DC converter is controlled by MPPT, The third constant voltage control is performed on the battery DC/DC converter, and the second filter smoothing control is performed on the supercapacitor DC/DC converter.

进一步的,本发明提出使用高通滤波器实现光伏波动功率平抑的方法以及为了提高电池的使用寿命,第一滤波平抑控制是通过高通滤波器实现的,高通滤波器的时间常数根据电池剩余电量的变化而变化。Further, the present invention proposes a method for using a high-pass filter to achieve photovoltaic fluctuation power smoothing and in order to improve the service life of the battery, the first filtering and smoothing control is realized by a high-pass filter, and the time constant of the high-pass filter changes according to the change of the remaining battery power. and change.

进一步的,本发明提供了根据电池剩余电量调节高通滤波器的时间常数的具体做法,更好地提高了锂电池的使用寿命,所述高通滤波器的时间常数根据电池剩余电量的变化而变化为:当电池处于充电状态下时,若电池剩余电量大于或等于第一剩余电量设定值,则控制高通滤波器的时间常数随电池剩余电量的增大而减小;当电池处于放电状态下时,若电池剩余电量处于第一剩余电量设定值与第二剩余电量设定值之间,则控制高通滤波器的时间常数随电池剩余电量的减小而减小。Further, the present invention provides a specific method of adjusting the time constant of the high-pass filter according to the remaining power of the battery, which better improves the service life of the lithium battery. The time constant of the high-pass filter changes according to the change of the remaining power of the battery as: : When the battery is in the charging state, if the remaining battery power is greater than or equal to the first remaining power setting value, the time constant for controlling the high-pass filter decreases with the increase of the remaining battery power; when the battery is in the discharging state , if the remaining battery power is between the first remaining power setting value and the second remaining power setting value, the time constant for controlling the high-pass filter decreases as the remaining battery power decreases.

本发明还提供了一种平抑光伏功率波动的光储并网控制装置,该装置包括处理器和存储器以及存储在存储器上并可在处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现以下步骤:1)采集光储混合微网系统的并网电压;2)当光储混合微网系统的并网电压大于或等于第一设定值且小于或等于第二设定值时,判定光储混合微网系统处于正常并网模式,对DC/AC变换器进行第一定电压控制,对光伏DC/DC变换器进行MPPT控制,对电池DC/DC变换器进行第一滤波平抑控制,对超级电容DC/DC变换器进行热备控制;3)当光储混合微网系统的并网电压低于第一设定值时,判定光储混合微网系统处于低电压并网模式,对DC/AC变换器进行无功给定控制和限流控制,对光伏DC/DC变换器进行限功率控制,对电池DC/DC变换器进行热备控制,对超级电容DC/DC变换器进行第二定电压控制。The present invention also provides an optical storage grid-connected control device for smoothing photovoltaic power fluctuations, the device includes a processor, a memory, and a computer program stored in the memory and executable on the processor, the processor executing the computer The following steps are implemented during the program: 1) Collect the grid-connected voltage of the hybrid optical-storage microgrid system; 2) When the grid-connected voltage of the hybrid optical-storage microgrid system is greater than or equal to the first set value and less than or equal to the second set value When the hybrid microgrid system is determined to be in the normal grid-connected mode, the first constant voltage control is performed on the DC/AC converter, the MPPT control is performed on the photovoltaic DC/DC converter, and the first filter is performed on the battery DC/DC converter. Smoothing control to perform hot backup control of the supercapacitor DC/DC converter; 3) When the grid-connected voltage of the optical-storage hybrid microgrid system is lower than the first set value, it is determined that the optical-storage hybrid microgrid system is connected to the grid at a low voltage The mode is to perform reactive power given control and current limiting control for DC/AC converters, power limit control for photovoltaic DC/DC converters, hot backup control for battery DC/DC converters, and DC/DC conversion for super capacitors. The controller performs the second constant voltage control.

本发明装置的有益效果:实现了正常并网模式下低电压并网模式下对光储发电系统中DC/AC、光伏DC/DC、电池DC/DC和超级电容DC/DC的精细化控制,有效地平抑了光储混合微网系统并网模式下的功率波动。The beneficial effects of the device of the present invention are as follows: the fine control of DC/AC, photovoltaic DC/DC, battery DC/DC and super capacitor DC/DC in the optical storage and power generation system in the low-voltage grid-connected mode in the normal grid-connected mode is realized, The power fluctuation in the grid-connected mode of the optical-storage hybrid microgrid system is effectively suppressed.

进一步的,当在并网模式下收到调度指令时,本发明还给出了对光储发电系统中DC/AC、光伏DC/DC、电池DC/DC和超级电容DC/DC的更加精细化控制,所述步骤2)中,若检测到调度指令,判定光储混合微网系统处于调度并网模式,对DC/AC变换器进行调度运行控制,对光伏DC/DC变换器进行MPPT控制,对电池DC/DC变换器进行第三定电压控制,对超级电容DC/DC变换器进行第二滤波平抑控制。Further, when the scheduling command is received in the grid-connected mode, the present invention also provides more refined DC/AC, photovoltaic DC/DC, battery DC/DC and super capacitor DC/DC in the photovoltaic power generation system. control, in the step 2), if a scheduling instruction is detected, it is determined that the hybrid optical-storage microgrid system is in the scheduling grid-connected mode, the DC/AC converter is scheduled and operated, and the photovoltaic DC/DC converter is controlled by MPPT, The third constant voltage control is performed on the battery DC/DC converter, and the second filter smoothing control is performed on the supercapacitor DC/DC converter.

进一步的,本发明提出使用高通滤波器实现光伏波动功率平抑的装置以及为了提高电池的使用寿命,第一滤波平抑控制是通过高通滤波器实现的,高通滤波器的时间常数根据电池剩余电量的变化而变化。Further, the present invention proposes a device for using a high-pass filter to achieve photovoltaic fluctuation power smoothing and in order to improve the service life of the battery, the first filtering and smoothing control is realized by a high-pass filter, and the time constant of the high-pass filter changes according to the remaining battery power. and change.

进一步的,本发明提供了根据电池剩余电量调节高通滤波器的时间常数的具体做法,更好地提高了锂电池的使用寿命,所述高通滤波器的时间常数根据电池剩余电量的变化而变化为:当电池处于充电状态下时,若电池剩余电量大于或等于第一剩余电量设定值,则控制高通滤波器的时间常数随电池剩余电量的增大而减小;当电池处于放电状态下时,若电池剩余电量处于第一剩余电量设定值与第二剩余电量设定值之间,则控制高通滤波器的时间常数随电池剩余电量的减小而减小。Further, the present invention provides a specific method of adjusting the time constant of the high-pass filter according to the remaining power of the battery, which better improves the service life of the lithium battery. The time constant of the high-pass filter changes according to the change of the remaining power of the battery as: : When the battery is in the charging state, if the remaining battery power is greater than or equal to the first remaining power setting value, the time constant for controlling the high-pass filter decreases with the increase of the remaining battery power; when the battery is in the discharging state , if the remaining battery power is between the first remaining power setting value and the second remaining power setting value, the time constant for controlling the high-pass filter decreases as the remaining battery power decreases.

附图说明Description of drawings

图1为现有的光储混合微电网系统结构示意图;FIG. 1 is a schematic structural diagram of an existing optical-storage hybrid microgrid system;

图2为本发明方法实施例1中的正常并网模式下的DC/AC变换器控制方法示意图;2 is a schematic diagram of a DC/AC converter control method in a normal grid-connected mode in Embodiment 1 of the method of the present invention;

图3为本发明方法实施例1中的正常并网模式下的光伏DC/DC变换器控制方法示意图;3 is a schematic diagram of a photovoltaic DC/DC converter control method in a normal grid-connected mode in Embodiment 1 of the method of the present invention;

图4为本发明方法实施例1中的正常并网模式下的电池DC/DC变换器控制方法示意图;4 is a schematic diagram of a control method for a battery DC/DC converter in a normal grid-connected mode in Embodiment 1 of the method of the present invention;

图5为本发明方法实施例1中的正常并网模式下的超级电容DC/DC变换器控制方法示意图;5 is a schematic diagram of a method for controlling a supercapacitor DC/DC converter in a normal grid-connected mode in Embodiment 1 of the method of the present invention;

图6为本发明方法实施例1中的正常并网模式下的高通滤波器的电路图;6 is a circuit diagram of a high-pass filter in a normal grid-connected mode in Embodiment 1 of the method of the present invention;

图7为本发明方法实施例1中的正常并网模式下的电池SOC-时间常数曲线图;7 is a graph of battery SOC-time constant in a normal grid-connected mode in Embodiment 1 of the method of the present invention;

图8为本发明方法实施例1中的低电压并网模式下的DC/AC变换器控制方法示意图;8 is a schematic diagram of a method for controlling a DC/AC converter in a low-voltage grid-connected mode in Embodiment 1 of the present invention;

图9为本发明方法实施例1中的低电压并网模式下的光伏DC/DC变换器控制方法示意图;9 is a schematic diagram of a photovoltaic DC/DC converter control method in a low-voltage grid-connected mode in Embodiment 1 of the method of the present invention;

图10为本发明方法实施例1中的低电压并网模式下的电池DC/DC变换器控制方法示意图;10 is a schematic diagram of a control method of a battery DC/DC converter in a low-voltage grid-connected mode in Embodiment 1 of the method of the present invention;

图11为本发明方法实施例1中的低电压并网模式下的超级电容DC/DC变换器控制方法示意图;11 is a schematic diagram of a method for controlling a supercapacitor DC/DC converter in a low-voltage grid-connected mode in Embodiment 1 of the present invention;

图12为本发明方法实施例2中的三种并网模式的控制逻辑图;12 is a control logic diagram of three grid-connected modes in method Embodiment 2 of the present invention;

图13为本发明方法实施例2中的调度并网模式下的DC/AC变换器控制方法示意图;13 is a schematic diagram of a DC/AC converter control method in a scheduling grid-connected mode in Embodiment 2 of the method of the present invention;

图14为本发明方法实施例2中的调度并网模式下的电池DC/DC变换器控制方法示意图;14 is a schematic diagram of a method for controlling a battery DC/DC converter in a scheduling grid-connected mode in Embodiment 2 of the method of the present invention;

图15为本发明方法实施例2中的调度并网模式下的超级电容DC/DC变换器控制方法示意图。15 is a schematic diagram of a method for controlling a supercapacitor DC/DC converter in a scheduling grid-connected mode in Embodiment 2 of the method of the present invention.

具体实施方式Detailed ways

下面结合附图对本发明的实施方式作进一步说明。The embodiments of the present invention will be further described below with reference to the accompanying drawings.

本发明的平抑光伏功率波动的光储并网控制方法以储能系统包括锂电池系统和超级电容系统为例进行阐述,相应的光储混合微电网的结构示意图如图1所示,包括光伏板、与光伏板连接的光伏DC/DC变换器、锂电池、与电池连接的电池DC/DC变换器、超级电容以及与超级电容连接的超级电容DC/DC变换器,光伏DC/DC变换器、电池DC/DC变换器和超级电容DC/DC变换器均通过DC/AC变换器连接交流电网。The photovoltaic power storage grid-connected control method for smoothing photovoltaic power fluctuations of the present invention is described by taking the energy storage system including a lithium battery system and a super capacitor system as an example, and the corresponding structure diagram of the photovoltaic storage hybrid microgrid is shown in FIG. , Photovoltaic DC/DC converters connected to photovoltaic panels, lithium batteries, battery DC/DC converters connected to batteries, supercapacitors and supercapacitor DC/DC converters connected to supercapacitors, photovoltaic DC/DC converters, Both the battery DC/DC converter and the supercapacitor DC/DC converter are connected to the AC grid through the DC/AC converter.

平抑光伏功率波动的光储并网控制方法实施例1:Embodiment 1 of the photovoltaic power storage grid-connected control method for smoothing photovoltaic power fluctuations:

本实施例中的平抑光伏功率波动的光储并网控制方法包括以下步骤:采集光储混合微网系统的并网电压,根据并网电压所述范围判断光储混合微电网系统处于正常并网模式还是低电压并网模式。The photovoltaic power storage grid-connected control method for smoothing photovoltaic power fluctuations in this embodiment includes the following steps: collecting the grid-connected voltage of the photovoltaic-storage hybrid microgrid system, and judging that the photovoltaic-storage hybrid microgrid system is in normal grid-connection according to the range of the grid-connected voltage The mode is still the low-voltage grid-connected mode.

当光储混合微网系统的并网电压大于或等于第一设定值且小于或等于第二设定值时,判定光储混合微网系统处于正常并网模式,对DC/AC变换器进行第一定电压控制,电压外环由给定直流母线电压值UDCref和实际采集的直流母线电压值UDC做差,差值通过PI控制器输出有功给定电流值

Figure BDA0001829155560000041
无功给定电流值
Figure BDA0001829155560000042
需要根据实际情况设定,内环采用dq解耦控制实现并网电流的控制,如图2所示;对光伏DC/DC变换器进行MPPT控制,也即最大功率点控制,是指采集光伏阵列输出的电压UPV和电流iPV,通过最大功率点算法(MPPT)将光伏阵列的输出电压Umppt调整到最佳位置,和实际光伏阵列输出电压UPV做差,通过PI控制器输出占空比控制光伏DC/DC模块,最终实现光伏阵列的最大功率输出,如图3所示;对电池DC/DC变换器进行第一频率平抑控制,也即中高频平抑控制,是指通过高通滤波器滤除光伏输出功率的低频信号,得到中高频信号作为锂电池DC/DC的给定功率Pbatref,除以当前锂电池端电压作为锂电池侧DC/DC给定输出电流i* bat,再与实际锂电池侧DC/DC输出电流ibat做差,通过PI控制输出可变占空比,最后控制锂电池DC/DC实现光储系统的中高频功率平抑,如图4所示;对超级电容DC/DC变换器进行热备控制,是指此时超级电容DC/DC处于工作状态,但是输出电流为零,
Figure BDA0001829155560000051
为超级电容侧DC/DC给定充放电电流,iC为超级电容侧DC/DC实际充放电电流,如图5所示。When the grid-connected voltage of the hybrid optical-storage microgrid system is greater than or equal to the first set value and less than or equal to the second set value, it is determined that the hybrid optical-storage microgrid system is in the normal grid-connected mode, and the DC/AC converter is The first constant voltage control, the voltage outer loop is made by the difference between the given DC bus voltage value U DCref and the actual collected DC bus voltage value U DC , and the difference value outputs the active given current value through the PI controller
Figure BDA0001829155560000041
Reactive power given current value
Figure BDA0001829155560000042
It needs to be set according to the actual situation. The inner loop adopts dq decoupling control to realize the control of grid-connected current, as shown in Figure 2; MPPT control of photovoltaic DC/DC converters, that is, maximum power point control, refers to the collection of photovoltaic arrays. The output voltage U PV and current i PV are adjusted to the optimal position by the maximum power point algorithm (MPPT), and the output voltage U mppt of the photovoltaic array is adjusted to the best position, and the difference is made with the actual photovoltaic array output voltage U PV , and the output duty is output through the PI controller. By controlling the photovoltaic DC/DC module, the maximum power output of the photovoltaic array is finally realized, as shown in Figure 3; the first frequency suppression control is performed on the battery DC/DC converter, that is, the medium and high frequency suppression control, which refers to the high-pass filter. Filter out the low-frequency signal of the photovoltaic output power, obtain the medium-high frequency signal as the given power P batref of the DC/DC of the lithium battery, divide it by the current terminal voltage of the lithium battery as the given output current i * bat of the DC/DC on the lithium battery side, and then compare it with the actual The DC/DC output current i bat on the lithium battery side is poor, and the output variable duty ratio is controlled by PI, and finally the DC/DC of the lithium battery is controlled to achieve the medium and high frequency power stabilization of the optical storage system, as shown in Figure 4; for the super capacitor DC The /DC converter performs hot standby control, which means that the supercapacitor DC/DC is in the working state at this time, but the output current is zero,
Figure BDA0001829155560000051
is the given charge and discharge current of the supercapacitor side DC/DC, and i C is the actual charge and discharge current of the supercapacitor side DC/DC, as shown in Figure 5.

在正常并网模式中,对锂电池DC/DC变换器进行中高频平抑控制主要是通过高通滤波器实现的,光伏输出功率通过高通滤波器输出的光伏的中频和高频功率信号为正时锂电池充电,为负时锂电池放电,并且建立时间常数τ和锂电池SOC的线性关系。图6为二阶高通滤波器电路图,根据此电路建立传递函数H(s):In the normal grid-connected mode, the medium and high frequency suppression control of the lithium battery DC/DC converter is mainly realized by the high-pass filter. When the battery is charged, the lithium battery is discharged when it is negative, and a linear relationship between the time constant τ and the SOC of the lithium battery is established. Figure 6 is a circuit diagram of a second-order high-pass filter. According to this circuit, the transfer function H(s) is established:

Figure BDA0001829155560000052
Figure BDA0001829155560000052

令:时间常数τ=RC,

Figure BDA0001829155560000053
Let: time constant τ=RC,
Figure BDA0001829155560000053

Figure BDA0001829155560000054
Figure BDA0001829155560000054

通带截止频率

Figure BDA0001829155560000055
通带截止频率和时间常数成反比,时间常数越小,通带截止频率越大,让锂电池补偿的功率越小。passband cutoff frequency
Figure BDA0001829155560000055
The pass-band cut-off frequency is inversely proportional to the time constant. The smaller the time constant, the larger the pass-band cut-off frequency, and the smaller the compensation power of the lithium battery.

根据这个原理绘制了SOC-τ工作曲线,如图7所示,当电池处于充电状态下时,当电池剩余电量小于第一剩余电量设定值a时,高通滤波器的时间常数为τ2=R2C2;若电池剩余电量大于或等于第一剩余电量设定值a,则控制高通滤波器的时间常数随电池剩余电量的增大而减小。According to this principle, the SOC-τ working curve is drawn. As shown in Figure 7, when the battery is in the charging state, when the remaining battery power is less than the first remaining power setting value a, the time constant of the high-pass filter is τ 2 = R 2 C 2 ; if the remaining battery power is greater than or equal to the first remaining power setting value a, the time constant for controlling the high-pass filter decreases as the remaining battery power increases.

当电池处于放电状态下时,当电池剩余电量大于第二剩余电量设定值c时,高通滤波器的时间常数为τ2=R2C2;若电池剩余电量处于第一剩余电量设定值a与第二剩余电量设定值c之间时,则控制高通滤波器的时间常数随电池剩余电量的减小而减小;当电池剩余电量小于第一剩余电量设定值a时,高通滤波器的时间常数为τ1=R1C1。根据图7设计锂电池充电曲线方程和锂电池放电曲线方程。When the battery is in the discharge state, when the remaining battery power is greater than the second remaining power setting value c, the time constant of the high-pass filter is τ 2 =R 2 C 2 ; if the remaining battery power is at the first remaining power setting value c When between a and the second remaining power setting value c, the time constant for controlling the high-pass filter decreases with the decrease of the remaining battery power; when the remaining battery power is less than the first remaining power setting value a, the high-pass filtering The time constant of the device is τ 1 =R 1 C 1 . According to Figure 7, the lithium battery charging curve equation and the lithium battery discharging curve equation are designed.

锂电池充电曲线方程:Lithium battery charging curve equation:

Figure BDA0001829155560000061
Figure BDA0001829155560000061

锂电池放电曲线方程:Lithium battery discharge curve equation:

Figure BDA0001829155560000062
Figure BDA0001829155560000062

当光储混合微网系统的并网电压低于第一设定值时,判定光储混合微网系统处于低电压并网模式,对DC/AC变换器进行无功给定控制和限流控制,

Figure BDA0001829155560000063
ed为电网相电压有效值,P*为实际要求输出的有功功率,因此实际输出有功和无功分别由实际情况给定,内环控制为dq解耦控制,如图8所示;对光伏DC/DC变换器进行限功率控制,是指通过MPPT限功率算法,即增加或者减小Umppt达到限光伏输出功率的目的,如图9所示;对电池DC/DC变换器进行热备控制,锂电池侧控制电流给定为零,此时锂电池DC/DC控制处于运行状态,但是不输出电流,如图10所示;对超级电容DC/DC变换器进行第二定电压控制,是指电压外环采用稳定直流母线电压,电流内环控制超级电容侧的电流的输出,最后通过控制PWM占空比实现稳定直流母线电压的目的,如图11所示。When the grid-connected voltage of the optical-storage hybrid microgrid system is lower than the first set value, it is determined that the optical-storage hybrid microgrid system is in the low-voltage grid-connected mode, and the DC/AC converter is given reactive power control and current limiting control. ,
Figure BDA0001829155560000063
e d is the effective value of the grid phase voltage, P * is the actual required output active power, so the actual output active power and reactive power are respectively given by the actual situation, and the inner loop control is dq decoupling control, as shown in Figure 8; Power limiting control of DC/DC converters refers to the purpose of limiting photovoltaic output power by increasing or decreasing U mppt through the MPPT power limiting algorithm, as shown in Figure 9; hot-standby control of battery DC/DC converters , the control current on the lithium battery side is given zero, at this time the lithium battery DC/DC control is in the running state, but no current is output, as shown in Figure 10; the second constant voltage control of the super capacitor DC/DC converter is It means that the voltage outer loop adopts stable DC bus voltage, and the current inner loop controls the output of the current on the supercapacitor side. Finally, the purpose of stabilizing the DC bus voltage is achieved by controlling the PWM duty cycle, as shown in Figure 11.

本实施例中采用锂电池,作为其他实施方式,也可以采用铅酸蓄电池等。In this embodiment, a lithium battery is used, and as another embodiment, a lead-acid battery or the like can also be used.

本实施例中a为10%,b为95%,c为97%;作为其他实施方式,也可以取与上述数值接近的数值,如a为10.1%,b为94.9%,c为97.2%。In this embodiment, a is 10%, b is 95%, and c is 97%; as other embodiments, values close to the above values can also be taken, for example, a is 10.1%, b is 94.9%, and c is 97.2%.

本实施例中建立了二阶高通滤波器时间常数τ和锂电池SOC的线性关系,作为其他实施方式,可以采用一阶高通滤波器、三阶高通滤波器等,采用一阶高通滤波器、三阶高通滤波器时只需使其对应的时间常数同样按照锂电池剩余电量调节即可;另外,可以不根据上述线性关系调整中间阶段的时间常数τ,而是在中间阶段根据锂电池剩余电量设置多个分段时间常数。In this embodiment, a linear relationship between the time constant τ of the second-order high-pass filter and the SOC of the lithium battery is established. As other implementations, a first-order high-pass filter, a third-order high-pass filter, etc. When the first-order high-pass filter is used, it is only necessary to adjust the corresponding time constant according to the remaining power of the lithium battery; in addition, the time constant τ in the middle stage can be adjusted not according to the above linear relationship, but set according to the remaining power of the lithium battery in the middle stage. Multiple piecewise time constants.

本实施例摒弃了在中间阶段采用固定时间常数的方法,更加柔性,提高了锂电池的使用寿命。This embodiment abandons the method of using a fixed time constant in the intermediate stage, is more flexible, and improves the service life of the lithium battery.

本实施例实现了正常并网模式下低电压并网模式下对光储发电系统中DC/AC、光伏DC/DC、电池DC/DC和超级电容DC/DC的精细化控制,有效地平抑了光储混合微网系统并网模式下的功率波动。This embodiment realizes the refined control of DC/AC, photovoltaic DC/DC, battery DC/DC, and supercapacitor DC/DC in the photovoltaic storage and power generation system in the low-voltage grid-connected mode in the normal grid-connected mode, effectively suppressing the Power fluctuation in grid-connected mode of a hybrid optical-storage microgrid system.

平抑光伏功率波动的光储并网控制方法实施例2:Embodiment 2 of the photovoltaic power storage grid-connected control method for smoothing photovoltaic power fluctuations:

本实施例与上述实施例的区别之处在于,本实施例还包括对调度并网模式下的精细化控制,如图12所示。The difference between this embodiment and the above-mentioned embodiment is that this embodiment also includes fine-grained control in the scheduling grid-connected mode, as shown in FIG. 12 .

当光储混合微网系统的并网电压大于或等于第一设定值且小于或等于第二设定值时,若有调度指令,判断光储发电系统处于调度并网模式,对DC/AC变换器进行调度运行控制,当接受到上级调度系统出力指令,可根据要求设定有功出力Pref和无功出力

Figure BDA0001829155560000071
如图13所示;对光伏DC/DC变换器仍进行MPPT控制,如图3所示;对锂电池DC/DC变换器进行稳定直流母线电压控制,即第三定电压控制,是指电压外环采用稳定直流母线电压,电流内环控制锂电池侧的电流的输出,最后通过控制PWM占空比实现稳定直流母线电压的目的,如图14所示;对超级电容DC/DC变换器进行第二频率平抑控制,也即高频平抑控制,通过高通滤波器得到光伏功率的高频信号PCref,经过计算得到超级电容侧DC/DC给定充放电电流
Figure BDA0001829155560000072
和超级电容侧DC/DC实际充放电电流ic做差,通过PI控制器调节,输出调制波,通过PWM控制输出可变占空比,最后实现超级电容给定输出功率的控制,如图15所示。对超级电容DC/DC变换器进行高频平抑控制可通过设置高通滤波器的通带截止频率减小滤波信号的带宽,实现高频信号滤除作用。When the grid-connected voltage of the optical-storage hybrid microgrid system is greater than or equal to the first set value and less than or equal to the second set value, if there is a dispatch command, it is judged that the photovoltaic-storage power generation system is in the dispatch grid-connected mode, and the DC/AC The inverter performs scheduling operation control. When receiving the output command from the upper-level scheduling system, the active power output P ref and reactive power output can be set according to the requirements.
Figure BDA0001829155560000071
As shown in Figure 13; MPPT control is still performed on the photovoltaic DC/DC converter, as shown in Figure 3; The loop adopts the stable DC bus voltage, the current inner loop controls the output of the current on the lithium battery side, and finally achieves the purpose of stabilizing the DC bus voltage by controlling the PWM duty cycle, as shown in Figure 14; The second frequency suppression control, that is, the high frequency suppression control, obtains the high frequency signal P Cref of the photovoltaic power through the high-pass filter, and obtains the DC/DC given charge and discharge current of the super capacitor side through calculation
Figure BDA0001829155560000072
The difference with the actual charge and discharge current ic of the supercapacitor side DC/DC is adjusted by the PI controller, the modulated wave is output, and the variable duty cycle is output by the PWM control, and finally the control of the given output power of the supercapacitor is realized, as shown in Figure 15. shown. The high-frequency suppression control of the supercapacitor DC/DC converter can reduce the bandwidth of the filtered signal by setting the passband cutoff frequency of the high-pass filter to achieve high-frequency signal filtering.

本实施例实现了调度并网模式下低电压并网模式下对光储发电系统中DC/AC、光伏DC/DC、电池DC/DC和超级电容DC/DC的精细化控制,有效地平抑了光储混合微网系统并网模式下的功率波动。This embodiment realizes the refined control of DC/AC, photovoltaic DC/DC, battery DC/DC, and supercapacitor DC/DC in the photovoltaic storage and power generation system in the low-voltage grid-connected mode in the dispatching grid-connected mode, effectively suppressing the Power fluctuation in grid-connected mode of a hybrid optical-storage microgrid system.

平抑光伏功率波动的光储并网控制装置实施例The embodiment of the photovoltaic power storage grid-connected control device for smoothing photovoltaic power fluctuations

本实施例中的平抑光伏功率波动的光储并网控制装置包括处理器和存储器以及存储在存储器上并可在处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现平抑光伏功率波动的光储并网控制方法实施例中的步骤。The photovoltaic power grid-connected control device for smoothing photovoltaic power fluctuations in this embodiment includes a processor, a memory, and a computer program stored in the memory and running on the processor, and the processor implements smoothing photovoltaic power when executing the computer program. Steps in an embodiment of an optical storage grid-connected control method for power fluctuations.

由于平抑光伏功率波动的光储并网控制方法实施例中已对相关步骤进行了详细描述,此处不再赘述。Since the relevant steps have been described in detail in the embodiments of the photovoltaic power storage grid-connected control method for stabilizing photovoltaic power fluctuations, they will not be repeated here.

以上所述,仅是本发明的较佳实施例而己,并非对发明作任何形式上的限制,虽然本发明己以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的方法及技术内容做出些许的更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所做的任何简单修改、等同变化与修饰,仍属于本发明技术方案的范围内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art, without departing from the scope of the technical solution of the present invention, can make some changes or modifications by using the methods and technical contents disclosed above to be equivalent embodiments of equivalent changes, but all those that do not depart from the technical solution of the present invention It should be noted that any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (4)

1. A light storage grid-connected control method for stabilizing photovoltaic power fluctuation comprises a photovoltaic panel, a photovoltaic DC/DC converter connected with the photovoltaic panel, a battery DC/DC converter connected with the battery, a super capacitor and a super capacitor DC/DC converter connected with the super capacitor, wherein the photovoltaic DC/DC converter, the battery DC/DC converter and the super capacitor DC/DC converter are all connected with an alternating current power grid through DC/AC converters, and is characterized in that the light storage grid-connected control method for stabilizing photovoltaic power fluctuation comprises the following steps:
1) collecting grid-connected voltage of the light-storage hybrid micro-grid system;
2) when the grid-connected voltage of the light-storage hybrid micro-grid system is larger than or equal to a first set value and smaller than or equal to a second set value, the light-storage hybrid micro-grid system is judged to be in a normal grid-connected mode, first fixed voltage control is carried out on a DC/AC converter, MPPT control is carried out on a photovoltaic DC/DC converter, first filtering stabilization control is carried out on a battery DC/DC converter, and hot standby control is carried out on a super-capacitor DC/DC converter;
3) when the grid-connected voltage of the light storage mixed micro-grid system is lower than a first set value, the light storage mixed micro-grid system is judged to be in a low-voltage grid-connected mode, reactive power setting control and current limiting control are carried out on a DC/AC converter, power limiting control is carried out on a photovoltaic DC/DC converter, hot standby control is carried out on a battery DC/DC converter, and second voltage setting control is carried out on a super capacitor DC/DC converter;
the first filtering stabilizing control is realized by a second-order high-pass filter, and the second-order high-pass filter is sequentially provided with two RC branches from an input end to an output end; the time constant of the second-order high-pass filter changes according to the change of the residual capacity of the battery, and when the battery is in a charging state:
Figure FDA0002545704670000011
when the battery is in a discharge state:
Figure FDA0002545704670000012
where τ is the time constant of the second order high pass filter, τ1=R1C1,τ2=R2C2SOC is a remaining battery capacity, a is a first remaining capacity setting value, b is a third remaining capacity setting value, c is a second remaining capacity setting value, and R is1Is the resistance value in the first RC branch, C1The capacitance value in the first RC branch is obtained; r2Is the resistance value, C, in the second RC branch2Is the capacitance in the second RC branch.
2. The optical storage grid-connected control method for stabilizing photovoltaic power fluctuation according to claim 1, wherein in the step 2), if a scheduling instruction is detected, it is determined that the optical storage hybrid microgrid system is in a scheduling grid-connected mode, the DC/AC converter is controlled according to the scheduling instruction, MPPT control is performed on the photovoltaic DC/DC converter, third constant voltage control is performed on the battery DC/DC converter, and second filtering stabilization control is performed on the super capacitor DC/DC converter.
3. A grid-connected photovoltaic control apparatus for stabilizing photovoltaic power fluctuation, the apparatus comprising a processor and a memory, and a computer program stored in the memory and operable on the processor, the processor implementing the following steps when executing the computer program:
1) collecting grid-connected voltage of the light-storage hybrid micro-grid system;
2) when the grid-connected voltage of the light-storage hybrid micro-grid system is larger than or equal to a first set value and smaller than or equal to a second set value, the light-storage hybrid micro-grid system is judged to be in a normal grid-connected mode, first fixed voltage control is carried out on a DC/AC converter, MPPT control is carried out on a photovoltaic DC/DC converter, first filtering stabilization control is carried out on a battery DC/DC converter, and hot standby control is carried out on a super-capacitor DC/DC converter;
3) when the grid-connected voltage of the light storage mixed micro-grid system is lower than a first set value, the light storage mixed micro-grid system is judged to be in a low-voltage grid-connected mode, reactive power setting control and current limiting control are carried out on a DC/AC converter, power limiting control is carried out on a photovoltaic DC/DC converter, hot standby control is carried out on a battery DC/DC converter, and second voltage setting control is carried out on a super capacitor DC/DC converter;
the first filtering stabilizing control is realized by a second-order high-pass filter, and the second-order high-pass filter is sequentially provided with two RC branches from an input end to an output end; the time constant of the second-order high-pass filter changes according to the change of the residual capacity of the battery, and when the battery is in a charging state:
Figure FDA0002545704670000021
when the battery is in a discharge state:
Figure FDA0002545704670000022
where τ is the time constant of the second order high pass filter, τ1=R1C1,τ2=R2C2SOC is a remaining battery capacity, a is a first remaining capacity setting value, b is a third remaining capacity setting value, c is a second remaining capacity setting value, and R is1Is the resistance value in the first RC branch, C1The capacitance value in the first RC branch is obtained; r2In the second RC branchResistance value of C2Is the capacitance in the second RC branch.
4. The grid-connected optical storage control device for stabilizing photovoltaic power fluctuation according to claim 3, wherein in the step 2), if a scheduling instruction is detected, it is determined that the hybrid optical storage microgrid system is in a scheduling grid-connected mode, the DC/AC converter is controlled according to the scheduling instruction, the MPPT control is performed on the photovoltaic DC/DC converter, the third constant voltage control is performed on the battery DC/DC converter, and the second filtering stabilization control is performed on the super capacitor DC/DC converter.
CN201811197464.0A 2018-10-15 2018-10-15 Light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation Active CN109245160B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811197464.0A CN109245160B (en) 2018-10-15 2018-10-15 Light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811197464.0A CN109245160B (en) 2018-10-15 2018-10-15 Light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation

Publications (2)

Publication Number Publication Date
CN109245160A CN109245160A (en) 2019-01-18
CN109245160B true CN109245160B (en) 2020-11-17

Family

ID=65052756

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811197464.0A Active CN109245160B (en) 2018-10-15 2018-10-15 Light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation

Country Status (1)

Country Link
CN (1) CN109245160B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109904866B (en) * 2019-02-22 2021-07-02 国电南瑞科技股份有限公司 A multi-energy storage microgrid grid-connected coordination control method and system
CN110299722A (en) * 2019-04-30 2019-10-01 南京工程学院 A kind of hydrogen fuel cell stabilizes the control method of photovoltaic output-power fluctuation
CN111293717B (en) * 2020-02-24 2021-11-02 阳光电源股份有限公司 Control method and system of optical storage direct current coupling system
CN115566728B (en) * 2022-11-01 2023-05-09 广州瑞鑫智能制造有限公司 Air compression station energy management method and system based on photovoltaic power generation and hybrid energy storage
CN117375041A (en) * 2023-09-18 2024-01-09 长江勘测规划设计研究有限责任公司 A photovoltaic power station hybrid energy storage device with power support function and control method and configuration method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104410093A (en) * 2014-12-11 2015-03-11 电子科技大学 Charge state control method of energy storage battery

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0809235D0 (en) * 2008-05-21 2008-06-25 Poweroasis Ltd Supervisory system controller for use with a renewable energy powered radio telecommunications site
US8598741B2 (en) * 2008-12-23 2013-12-03 Samsung Electro-Mechanics Co, Ltd. Photovoltaic and fuel cell hybrid generation system using single converter and single inverter, and method of controlling the same
CN104184159B (en) * 2014-06-28 2016-08-24 广东元景能源股份有限公司 The cooperative scheduling strategy of polynary energy storage in light storage distributed micro-grid system
CN104659799A (en) * 2015-03-19 2015-05-27 国家电网公司 Fuzzy control method of battery energy storage system for restraining wind power fluctuation
CN105375512B (en) * 2015-11-06 2018-01-30 重庆大学 The power coordination control method of hybrid energy-storing in light storing cogeneration system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104410093A (en) * 2014-12-11 2015-03-11 电子科技大学 Charge state control method of energy storage battery

Also Published As

Publication number Publication date
CN109245160A (en) 2019-01-18

Similar Documents

Publication Publication Date Title
CN109245160B (en) Light storage grid-connected control method and device for stabilizing photovoltaic power fluctuation
CN107181275B (en) A kind of photovoltaic DC microgrid control method of the system containing distributed energy storage
CN113690873A (en) Photovoltaic direct-current micro-grid coordination control method containing hybrid energy storage
CN103647274B (en) Energy control method for micro-grid system capable of being operated in grid-connected mode and off-grid mode
CN112600249B (en) Multi-mode control method for photovoltaic grid-connected inversion system capable of storing energy
CN110086181B (en) A power adaptive collaborative control method for power-heat cogeneration microgrid in off-grid operation
CN110120679B (en) Household photovoltaic energy storage converter coupled with direct current side of photovoltaic inverter
CN110912242B (en) Large disturbance transient stability coordinated control method for DC microgrid with hybrid energy storage
CN103887807B (en) A kind of micro-capacitance sensor energy storage device based on power prediction is from network control method
CN110311396A (en) An optimal configuration method for hybrid energy storage capacity of AC-DC hybrid microgrid
CN109301914B (en) Photovoltaic micro-grid energy storage control method with SOC optimization
CN110299722A (en) A kind of hydrogen fuel cell stabilizes the control method of photovoltaic output-power fluctuation
CN108767872B (en) Fuzzy control method applied to wind-solar hybrid energy storage micro-grid system
CN102185533A (en) Stored energy type standard-Z source photovoltaic power generation control system and method
Adhikari et al. A battery/supercapacitor hybrid energy storage system for DC microgrids
CN108199380A (en) A kind of control method of two-way DC-AC converters suitable for alternating current-direct current mixing micro-capacitance sensor
CN113809733B (en) DC bus voltage and supercapacitor charge management control method for photovoltaic storage system
CN113541287A (en) DC micro-grid photovoltaic power generation hybrid energy storage system and control strategy
CN106786694A (en) A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating
CN114552600A (en) Frequency adjusting method for photovoltaic grid-connected power generation participation system
CN111446725B (en) Hybrid energy storage frequency modulation control method for micro-grid
CN204886204U (en) Energy storage system with hybrid energy storage device
CN112865067A (en) Power distribution method and system of hybrid energy storage system and electronic equipment
CN116914791A (en) Power flow logic control method based on hybrid energy storage system in micro-grid system
CN112165113A (en) A method for ensuring power quality of microgrid based on control of hybrid energy storage system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant