WO2016041422A1 - 一种用于平衡电网负荷的电池储能装置及方法 - Google Patents

一种用于平衡电网负荷的电池储能装置及方法 Download PDF

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Publication number
WO2016041422A1
WO2016041422A1 PCT/CN2015/086540 CN2015086540W WO2016041422A1 WO 2016041422 A1 WO2016041422 A1 WO 2016041422A1 CN 2015086540 W CN2015086540 W CN 2015086540W WO 2016041422 A1 WO2016041422 A1 WO 2016041422A1
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battery
cabinet
energy storage
power
storage device
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PCT/CN2015/086540
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English (en)
French (fr)
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蔡文生
黎文椿
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绿源霖节能科技（天津）有限公司
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Publication of WO2016041422A1 publication Critical patent/WO2016041422A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • 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

Definitions

  • the present invention relates to energy storage devices and methods in a power grid system, and more particularly to a battery energy storage device and method for balancing grid loads.
  • the load of the power grid is very uneven at different times of the day.
  • the power consumption during peak hours during the day is high, and the electricity consumption is low at night and the electricity price is also generated according to different time periods. If the energy storage of the grid during the low valley period can be When it comes to supply during peak hours, it not only reduces the load on the grid during peak hours, but also brings considerable economic benefits. In the case that the power supply equipment requires a large amount of power, the power stored in the low valley period cannot be fully supplied to the peak period, and the use of the battery energy storage device is limited.
  • the technical problem to be solved by the present invention is that the existing grid load is very uneven.
  • the power supply equipment requires a large amount of power, the stored energy in the low valley period cannot be fully supplied to the peak period, and the battery storage device is used. Limited .
  • the present invention provides a solution to the deficiencies in the prior art.
  • the battery energy storage device stores the electric energy when the electricity price is low according to the electricity price gradient, supplies the electricity when the electricity price is high, and introduces the green energy of the sunlight into the energy storage device, so as to solve the problem that the power supply of the simple power grid cannot be supplied for a long time.
  • the battery pack is charged by the combination of the grid and the solar energy when the electricity price is low, and the performance of the battery energy storage device is optimized. .
  • a battery energy storage device for balancing grid load comprising:
  • the integrated control machine provides power to the power supply screen and controls the charging and discharging modes of the battery cabinet;
  • the solar module charges the battery pack cabinet through the integrated control machine
  • the integrated control machine includes a control device, a charger and an inverter, wherein the charger charges the battery cabinet with the grid power, and the inverter will be the battery cabinet
  • the direct current is converted into alternating current and supplied to the power supply screen;
  • the control device controls the charging and discharging modes of the battery cabinet according to the electricity price.
  • the control charger charges the battery cabinet; when the electricity price is high, the control inverter supplies the power of the battery cabinet to the power supply. Electric screen; when there is sunlight, it is preferred to charge the battery cabinet by the solar module, and the solar module charging and the grid charging can be performed simultaneously or separately;
  • the control device monitors the energy stored in the battery cabinet, and controls the power supply according to the energy storage of the battery cabinet. When the stored energy is greater than the discharge threshold, the battery pack provides electrical energy to the power supply panel. When the stored energy is less than the discharge threshold, The grid directly supplies power to the power grid.
  • the battery cabinet further has a battery life extender, and the battery life extender compensates the battery cabinet.
  • the energy storage device further includes a monitoring device for monitoring battery panel parameter information in real time, and the monitored parameter information includes battery internal resistance, Any one or several of real-time current, voltage and temperature.
  • the monitoring device includes a local alarm and a remote monitoring device, and the control panel displays the monitoring device when the monitored parameter exceeds a preset value. And an alarm is issued, and the alarm prompt can be in the form of a sound or a digital flashing light.
  • the remote control device refers to recording the parameters on the third-party display device, and can not know the performance parameters of the entire device when not in the field.
  • the invention simultaneously discloses a method for balancing the load of the power grid, monitoring the energy storage of the battery cabinet, and controlling the power supply according to the energy storage of the battery cabinet.
  • the battery pack When the stored energy is greater than the discharge threshold, the battery pack is discharged to provide power to the power supply screen.
  • the power supply is directly supplied to the power supply screen by the power grid;
  • the method further includes: when there is sunlight, the battery module is preferentially charged by the solar module; when the electricity price is low, the battery cabinet is charged by the power grid; when the electricity price is high, the power grid does not charge the battery cabinet. .
  • the battery energy storage device and method for balancing the grid load according to the present invention store the electric energy at a low electricity price according to the electricity price gradient, supply the electricity when the electricity price is high, and introduce the green energy of the sunlight into the energy storage device.
  • the battery pack can be charged by the combination of the grid and the solar energy when the electricity price is low, and the performance of the battery energy storage device is optimized.
  • FIG. 1 is a schematic structural view of a battery energy storage device provided by the present invention.
  • FIG. 2 is a schematic diagram of the operation of the battery energy storage device for balancing the grid load provided by the present invention.
  • a battery energy storage device for balancing grid load includes a battery cabinet 10 , an integrated control unit 20 , a solar module 30 , a battery life extender 40 , and the integrated control unit 20 includes a charger 21 .
  • the inverter 22, the control device 23, the charger 21 charges the power of the grid 50 to the battery cabinet 10, and the inverter 22 converts the direct current of the battery cabinet 10 into alternating current and supplies it to the power supply screen 60, or As an uninterruptible power supply, it supplies power to other devices.
  • the battery life extender 40 compensates the battery pack cabinet 10 to increase the life of the battery pack cabinet 10.
  • the control device 23 controls the charging and discharging modes of the battery cabinet 10 according to the electricity price.
  • the charger is controlled to charge the battery cabinet until the charging threshold is reached; when the electricity price is high, the inverter controls the battery.
  • the power transmission of the cabinet is powered by the power screen until the discharge threshold of the battery pack is discharged; when there is sunlight, the battery module 10 is preferentially charged by the solar module 30; the solar module 30 is charged and the grid 50 is charged. Simultaneously, it can also be carried out separately.
  • the control device 23 monitors the stored energy of the battery cabinet 10, and controls the power supply according to the storage energy of the battery pack.
  • the battery pack 10 discharges power to the power supply screen 60, and the stored energy is less than
  • the threshold is discharged, power is supplied directly from the grid 50 to the power supply panel 60.
  • the charging threshold and the discharging threshold can be set according to actual needs, so as to perform peak charging and charging on the grid load.
  • the charging threshold is 100% battery.
  • the cabinet capacity, the discharge threshold is 80% of the battery cabinet capacity.
  • the battery cabinet 10 further has a monitoring device 70.
  • the battery cabinet is composed of a plurality of batteries.
  • the monitoring device is independently connected to each battery, and can detect the internal resistance, real-time current, voltage and temperature parameters of the single battery, and the monitoring device controls
  • the panel displays various values in real time and records and stores them in the remote monitoring device.
  • the control panel of the monitoring device alerts the alarm.
  • the remote control device simultaneously gives an alarm prompt, and once the battery cabinet is abnormal, the control device 23 automatically switches the power supply mode to the grid power supply mode.
  • FIG. 2 it is a day-to-day operation of the battery energy storage device described in the application.
  • the day is divided into five consecutive working hours.
  • the power supply screen 60 is directly powered by the power grid 50, and the power grid 50 passes the battery through the charger 21.
  • the group cabinet 10 is charged, and after the charging threshold is reached, the charging is completed, waiting for the next time period to arrive; during the peak time period from 8:00 to 12:00, the battery unit cabinet 10 is discharged through the inverter 22 to supply power to the power supply screen 60. If there is sunlight during this period, the battery pack cabinet 10 is charged by the solar module 30. When the battery pack cabinet is lower than the discharge threshold, the discharge is stopped, and the power grid 50 directly supplies power to the power supply screen 60 until the next period.
  • the power supply 50 directly supplies power to the power supply panel 60, while the power grid 50 and the solar module 30 charge the battery pack cabinet 10 until the charging threshold is reached;
  • the battery pack 10 is discharged through the inverter 22 to supply power to the power supply screen 60.
  • the discharge is stopped, and the power supply is directly supplied by the power grid 50.
  • Screen 60 is powered, at this time Not charged; 21: 00-24: 00 flat segment period, power supply 50 supplies power directly from the electric screen 60, this period is not charging.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

一种用于平衡电网负荷的电池储能装置和方法，该电池储能装置包括电池组柜、一体式控制机（20）、太阳能模组（30），其中一体式控制机包括控制装置（23）、充电器（21）及逆变器（22），充电器将电网电能对电池组柜（10）进行充电，逆变器将电池组柜的直流电转变成交流电并供给供电电屏（60），控制装置根据电价来控制电池组柜的充、放电模式，监测电池组柜储能量，并根据电池组柜储能量控制供电形式。该方法利用电价低时的电网与太阳能有机结合对电池组柜进行充电，优化了电池储能装置的工作性能。

Description

一种用于平衡电网负荷的电池储能装置及方法 技术领域
本发明涉及电网系统中的储能装置和方法，更具体地涉及一种用于平衡电网负荷的电池储能装置和方法。
背景技术
电网在每天不同的时段的负荷是很不均衡的，白天高峰时段用电量较高，晚上低谷时段用电量较低，而电价也根据时段不同产生梯度，如果能将低谷时段电网的电能存储起来在用电高峰时来供给，不仅能减小高峰时期电网的负荷，也带来了可观的经济效益。在供电设备需要电量较大情形下，低谷时段存储的电能不能完全供给高峰时段的需求，给电池储能装置的使用带来一定的限定。
 技术问题
本发明要解决的技术问题为现有的电网负荷很不均匀，在供电设备需要电量较大情形下，低谷时段存储的电能不能完全供给高峰时段的需求，给电池储能装置的使用带来一定的限定 。 本发明为了解决现有技术中的不足而提供一种 电池储能装置，根据电价梯度，将电价较低时的电能储存起来，在电价较高时来进行供给，同时将阳光的绿色能源引入储能装置，解决单纯电网充电电量不能长时间供给的问题，利用电价低时的电网与太阳能有机结合对电池组柜进行充电，优化了电池储能装置的工作性能 。
技术解决方案
为达到上述目的，本发明采用的技术方案为：
一种用于平衡电网负荷的电池储能装置，所述的电池储能装置包括：
电池组柜；
一体式控制机，所述一体式控制机向供电电屏提供电能并控制电池组柜的充、放电模式；
太阳能模组，通过一体式控制机向电池组柜充电；
其中所述的一体式控制机包括控制装置、充电器及逆变器，所述的充电器将电网电能对所述电池组柜进行充电，所述的逆变器将所述的电池组柜的直流电转变成交流电并供给供电电屏；
所述控制装置根据电价来控制电池组柜的充、放电模式，当电价低时，控制充电器对电池组柜进行充电；当电价高时，控制逆变器将电池组柜的电能输送给供电电屏；当有阳光时，优先选择由太阳能模组对电池组柜进行充电，太阳能模组充电和电网充电可以同时进行也可单独进行；
所述控制装置监测电池组柜储能量，根据电池组柜储能量控制供电形式，当储能量大于放电阈值时，由电池组柜放电向供电电屏提供电能，当储能量小于放电阈值时，由电网直接向供电电屏提供电能。
作为本发明所述的用于平衡电网负荷的电池储能装置的一种优选方案，所述的电池组柜还具有电池延寿器，电池延寿器对电池组柜进行补偿。
作为本发明所述的用于平衡电网负荷的电池储能装置的一种优选方案，所述的储能装置还包括监控装置，实时监测电池组柜参数信息，监测的参数信息包括电池内阻、实时电流、电压及温度中的任意一种或几种。
作为本发明所述的用于平衡电网负荷的电池储能装置的一种优选方案，所述的监控装置包括本地报警和远程监控装置，当监测的参数超出预设值后监控装置的控制面板显示并发出报警，报警提示可以为声音、数字闪烁灯形式。远程控制装置指的是在第三方显示装置上记录各参数，不在现场也能知道整个装置的性能参数。
本发明同时公布了一种平衡电网负荷的方法，监测电池组柜的储能量，根据电池组柜储能量控制供电形式，当储能量大于放电阈值时，由电池组柜放电向供电电屏提供电能，当储能量小于放电阈值时，由电网直接向供电电屏提供电能；
其中该方法还包括：当有阳光时，优先选择由太阳能模组对电池组柜进行充电；当电价低时，由电网对电池组柜进行充电；当电价高时，电网不对电池组柜进行充电。
有益效果：
本发明所述的平衡电网负荷的电池储能装置及方法，根据电价梯度，将电价较低时的电能储存起来，在电价较高时来进行供给，同时将阳光的绿色能源引入储能装置，解决单纯电网充电电量不能长时间供给的问题，利用电价低时的电网与太阳能有机结合对电池组柜进行充电，优化了电池储能装置的工作性能。
 附图说明
图1是本发明提供的电池储能装置的结构示意图。
图2是本发明提供的平衡电网负荷的电池储能装置工作示意图。
其中：10、电池组柜 20、一体式控制机 21、充电器 22、逆变器 23、控制装置 30、太阳能模组 40、电池延寿器 50、电网 60、供电电屏 70、监控装置
 本发明的实施方式
以下结合附图对本发明的原理和特征进行描述，所举实例只用于解释本发明，并非用于限定本发明的范围。
如图1所示，一种用于平衡电网负荷的电池储能装置，包括电池组柜10、一体式控制机20、太阳能模组30、电池延寿器40，一体式控制机20包括充电器21、逆变器22、控制装置23，充电器21将电网50的电能对所述电池组柜10进行充电，逆变器22将电池组柜10的直流电转变成交流电并供给供电电屏60，或作为不断电电源为其他设备提供电能。电池延寿器40对电池组柜10进行补偿，以提高电池组柜10寿命。
所述控制装置23根据电价来控制电池组柜10的充、放电模式，当电价低时，控制充电器对电池组柜进行充电，直到达到充电阈值；当电价高时，控制逆变器将电池组柜的电能输送带供电电屏，直到放电到电池组柜的放电阈值；当有阳光时，优先选择由太阳能模组30对电池组柜10进行充电；太阳能模组30充电和电网50充电可以同时进行也可单独进行。
所述控制装置23监测电池组柜10的储能量，根据电池组柜储能量控制供电形式，当储能量大于放电阈值时，由电池组柜10放电向供电电屏60提供电能，当储能量小于放电阈值时，由电网50直接向供电电屏60提供电能。其中电池组柜10进行充、放电时，充电阈值与放电阈值均可以根据实际需要来设定，以起到对电网负荷进行峰放谷充的作用，优选地，所述充电阈值为100%电池组柜容量，所述放电阈值为80%电池组柜容量。
优选地，电池组柜10还具有监控装置70，电池组柜由多个电池组成，监控装置与每个电池独立连接，可以检测单个电池的内阻、实时电流、电压及温度参数，监控装置控制面板实时显示各项数值，并在远程监控装置内记录并存储，当其中某个电池或者整个电池组柜的任一参数超过正常工作范围数值的预设值后，监控装置的控制面板进行报警提醒，而远程控制装置同时进行报警提示，一旦电池组柜出现异常，控制装置23自动将供电形式切换至电网供电模式。
如图2所示，为一应用所述的电池储能装置一天工作情形。
根据某市的电价规定，将一天分为五个连续工作时段，在0:00-8:00为低谷时段，由电网50直接对供电电屏60进行供电，同时电网50通过充电器21对电池组柜10进行充电，达到充电阈值后充电完毕，等待下一时段到来；在8:00-12:00为高峰时段，由电池组柜10通过逆变器22放电对供电电屏60进行供电，如果此时段有阳光，则通过太阳能模组30对电池组柜10进行充电，当电池组柜电量低于放电阈值后，停止放电，由电网50直接向供电电屏60进行供电，直到下一个时段到来；在12:00-17:00为平段时段，由电网50直接向供电电屏60进行供电，同时电网50及太阳能模组30向电池组柜10进行充电，直到达到充电阈值；在17:00-21:00为高峰时段，由电池组柜10通过逆变器22放电对供电电屏60进行供电，当电池组柜电量低于放电阈值后，停止放电，由电网50直接向供电电屏60进行供电，此时段不充电；在21:00-24:00为平段时段，由电网50直接向供电电屏60进行供电，此时段不充电。
虽然说明书中对本发明的实施方式进行了说明，但这些实施方式只是作为提示，不应限定本发明的保护范围。在不脱离本发明宗旨的范围内进行各种省略、置换和变更均应包含在本发明的保护范围内。

Claims (7)

  1. 种用于平衡电网负荷的电池储能装置，其特征在于：所述的电池储能装置包括：
    电池组柜；
    一体式控制机，所述一体式控制机向供电电屏提供电能并控制电池组柜的充、放电模式；
    太阳能模组，通过一体式控制机向电池组柜充电；
    其中所述的一体式控制机包括控制装置、充电器及逆变器，所述的充电器将电网电能对所述电池组柜进行充电，所述的逆变器将所述的电池组柜的直流电转变成交流电并供给供电电屏；
    所述控制装置根据电价来控制电池组柜的充、放电模式，当电价低时，控制充电器对电池组柜进行充电；当电价高时，控制逆变器将电池组柜的电能输送给供电电屏；当有阳光时，优先选择由太阳能模组对电池组柜进行充电；
    所述控制装置监测电池组柜储能量，根据电池组柜储能量控制供电形式，当储能量大于放电阈值时，由电池组柜放电向供电电屏提供电能，当储能量小于放电阈值时，由电网直接向供电电屏提供电能。
  2. 根据权利要求1所述的用于平衡电网负荷的电池储能装置，其特征在于：所述的电池组柜还具有电池延寿器，电池延寿器对电池组柜进行补偿。
  3. 根据权利要求1所述的用于平衡电网负荷的电池储能装置，其特征在于：所述的储能装置还包括监控装置，实时监测电池组柜参数信息。
  4. 根据权利要求3所述的用于平衡电网负荷的电池储能装置，其特征在于：所述的监控装置包括本地报警和远程监控装置。
  5. 根据权利要求3所述的用于平衡电网负荷的电池储能装置，其特征在于：所述的电池组柜参数信息包括电池内阻、实时电流、电压及温度中的任意一种或几种。
  6. 一种平衡电网负荷的方法，其特征在于，该方法包括：
    监测电池组柜的储能量，根据电池组柜储能量控制供电形式，当储能量大于放电阈值时，由电池组柜放电向供电电屏提供电能，当储能量小于放电阈值时，由电网直接向供电电屏提供电能； 其中该方法还包括：当有阳光时，优先选择由太阳能模组对电池组柜进行充电；当电价低时，由电网对电池组柜进行充电；当电价高时，电网不对电池组柜进行充电。
  7. 根据权利要求6所述的平衡电网负荷的方法，其特征在于，该方法还包括：本地报警装置和远程监控装置，实时监测电池组柜的内阻、实时电流、电压及温度中的任意一种或几种参数信息。
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