CN113629851A - 一种蓄电池储能直流备用电源工作控制方法 - Google Patents

一种蓄电池储能直流备用电源工作控制方法 Download PDF

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CN113629851A
CN113629851A CN202110930733.5A CN202110930733A CN113629851A CN 113629851 A CN113629851 A CN 113629851A CN 202110930733 A CN202110930733 A CN 202110930733A CN 113629851 A CN113629851 A CN 113629851A
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姜鑫东
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Nantong Power Supply Co Of State Grid Jiangsu Electric Power Co
Nantong Tongming Group Co ltd
Nantong Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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Nantong Power Supply Co Of State Grid Jiangsu Electric Power Co
Nantong Tongming Group 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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Abstract

本发明提供了一种蓄电池储能直流备用电源工作控制方法，包括：(1)：采集直流备用电源工作信息和外部线路供电信息；(2)：判断外部线路供电是否异常，是，至(3)；否，至(6)；(3)：控制直流备用电源为外部线路供电；(4)：计算直流备用电源实际电能；(5)：计算供电时间，显示；(6)：计算蓄电池实际荷电状态；(7)：确定是否给蓄电池进行充电；(8)：当蓄电池实际荷电状态达到荷电状态额定值，计算直流备用电源最大输出功率；(9)：判断最大输出功率是否小于参考值，若是，控制直流备用电源接入其它蓄电池或直流电源。本发明提供一种蓄电池储能直流备用电源工作控制方法，当外部线路供电异常时能够保证安全可靠供电。

Description

一种蓄电池储能直流备用电源工作控制方法
技术领域
本发明属于电力检测技术领域，特别涉及一种蓄电池储能直流备用电源工作控制方法。
背景技术
直流备用电源作为用电用户来说是保证重要设备供电的保障，当突发断电时，能够及时可靠的为重要不可停电设备提供电源。大多直流备用电源采用蓄电池进行电能存储，但由于直流备用电源只有在突发状况才会使用，因此需要对其进行监控，以保证其存储的电能充足。
本发明提出一种蓄电池储能直流备用电源工作控制方法，根据蓄电池实际状况计算直流备用电源最大输出功率，进而保证直流备用电源储存足够的电能，当外部线路供电异常时能够保证安全可靠的供电。
发明内容
本发明提供一种蓄电池储能直流备用电源工作控制方法，当外部线路供电异常时能够保证安全可靠的供电。
本发明具体为一种蓄电池储能直流备用电源工作控制方法，所述蓄电池储能直流备用电源工作控制方法包括以下步骤：
步骤(1)：采集所述直流备用电源工作信息和外部线路供电信息；
步骤(2)：判断所述外部线路供电是否异常，若是，进入步骤(3)；若不是，进入步骤(6)；
步骤(3)：控制所述直流备用电源为所述外部线路供电；
步骤(4)：计算所述直流备用电源实际电能；
步骤(5)：根据当前输出功率计算供电时间，并进行显示；
步骤(6)：计算所述蓄电池的实际荷电状态；
步骤(7)：根据所述实际荷电状态确定是否给所述蓄电池进行充电；
步骤(8)：当所述蓄电池实际荷电状态达到荷电状态额定值，计算所述直流备用电源最大输出功率；
步骤(9)：判断所述最大输出功率是否小于最大输出功率参考值，若是，控制直流备用电源接入其它蓄电池或直流电源，以保证当所述外部线路供电异常时能够正常供电。
计算所述蓄电池的实际荷电状态的具体算法为：
Figure BDA0003210561870000021
其中Q为所述蓄电池容量，Q0为所述蓄电池标称容量。
计算所述直流备用电源最大输出功率的具体算法为：
所述直流备用电源最大输出功率为Pmax＝Ud0I0-P0，
若所述直流备用电源逆变器的触发角小于最小触发角，Ud0为所述直流备用电源整流站的极对地直流电压，I0为所述直流备用电源电流平均值，P0为电流增大前直流功率；
若所述直流备用电源逆变器的触发角不小于所述最小触发角，
(1)计算所述直流备用电源换流变压器阀侧空载线电压有效值U0；
(2)计算电流调整值I1；
(3)计算电流增大后所述整流站直流电压Ud1；
(4)计算电流增大后的交流母线电压幅值U1；
(5)计算电流增大后所述逆变器的触发角α1，并令I0＝I1，Ud0＝Ud1，α0＝α1；
(6)判断α0是否大于所述最小触发角，若是，返回(1)；若不是，所述直流备用电源最大输出功率为Pmax＝Ud0I0-P0。
计算所述直流备用电源换流变压器阀侧空载线电压有效值的算法为
Figure BDA0003210561870000022
其中α0为所述逆变器的触发角，N1为所述直流备用电源换流站每极中的6脉动换流器数，Xr1为所述整流站每相的换相电抗。
计算所述电流调整值的算法为I1＝I0+ΔI，其中ΔI为电流增量。
计算电流增大后所述整流站直流电压的算法为Ud1＝Ud0+RΔI，其中R为所述整流站直流回路电阻。
计算电流增大后的所述交流母线电压幅值的算法为
Figure BDA0003210561870000031
其中
Figure BDA0003210561870000032
m＝Jqδ(Pd1-Pd0)/(JpδJqv-JpvJqδ)，n＝Jpδ/(JpδJqv-JpvJqδ)，
Figure BDA0003210561870000033
Pd1＝Ud1I1，Pd0＝Ud0I0；
Figure BDA0003210561870000034
E为所述外部线路等值电势幅值，U为所述换流站母线电压幅值，X为所述外部线路的等效内阻，δ为所述外部线路等值电势相角超前换流站母线电压相角的功角差；
Figure BDA0003210561870000035
计算电流增大后所述逆变器的触发角的算法为
Figure BDA0003210561870000036
与现有技术相比，有益效果是：根据蓄电池实际状况计算直流备用电源最大输出功率，进而保证直流备用电源储存足够的电能，当外部线路供电异常时能够保证安全可靠的供电。
附图说明
图1为本发明一种蓄电池储能直流备用电源工作控制方法的工作流程图。
具体实施方式
下面结合附图对本发明一种蓄电池储能直流备用电源工作控制方法的具体实施方式做详细阐述。
如图1所示，本发明的蓄电池储能直流备用电源工作控制方法包括以下步骤：
步骤(1)：采集所述直流备用电源工作信息和外部线路供电信息；
步骤(2)：判断所述外部线路供电是否异常，若是，进入步骤(3)；若不是，进入步骤(6)；
步骤(3)：控制所述直流备用电源为所述外部线路供电；
步骤(4)：计算所述直流备用电源实际电能；
步骤(5)：根据当前输出功率计算供电时间，并进行显示；
步骤(6)：计算所述蓄电池的实际荷电状态；
步骤(7)：根据所述实际荷电状态确定是否给所述蓄电池进行充电；
步骤(8)：当所述蓄电池实际荷电状态达到荷电状态额定值，计算所述直流备用电源最大输出功率；
步骤(9)：判断所述最大输出功率是否小于最大输出功率参考值，若是，控制直流备用电源接入其它蓄电池或直流电源，以保证当所述外部线路供电异常时能够正常供电。
计算所述蓄电池的实际荷电状态的具体算法为：
Figure BDA0003210561870000041
其中Q为所述蓄电池容量，Q0为所述蓄电池标称容量。
计算所述直流备用电源最大输出功率的具体算法为：
所述直流备用电源最大输出功率为Pmax＝Ud0I0-P0，
若所述直流备用电源逆变器的触发角小于最小触发角，Ud0为所述直流备用电源整流站的极对地直流电压，I0为所述直流备用电源电流平均值，P0为电流增大前直流功率；
若所述直流备用电源逆变器的触发角不小于所述最小触发角，
(1)计算所述直流备用电源换流变压器阀侧空载线电压有效值
Figure BDA0003210561870000042
其中α0为所述逆变器的触发角，N1为所述直流备用电源换流站每极中的6脉动换流器数，Xr1为所述整流站每相的换相电抗；
(2)计算电流调整值I1＝I0+ΔI，其中ΔI为电流增量；
(3)计算电流增大后所述整流站直流电压Ud1＝Ud0+RΔI，其中R为所述整流站直流回路电阻；
(4)计算电流增大后的交流母线电压幅值
Figure BDA0003210561870000043
其中
Figure BDA0003210561870000044
m＝Jqδ(Pd1-Pd0)/(JpδJqv-JpvJqδ)，n＝Jpδ/(JpδJqv-JpvJqδ)，
Figure BDA0003210561870000045
Pd1＝Ud1I1，Pd0＝Ud0I0；
Figure BDA0003210561870000046
E为所述外部线路等值电势幅值，U为所述换流站母线电压幅值，X为所述外部线路的等效内阻，δ为所述外部线路等值电势相角超前换流站母线电压相角的功角差；
Figure BDA0003210561870000047
(5)计算电流增大后所述逆变器的触发角
Figure BDA0003210561870000051
并令I0＝I1，Ud0＝Ud1，α0＝α1；
(6)判断α0是否大于所述最小触发角，若是，返回(1)；若不是，所述直流备用电源最大输出功率为Pmax＝Ud0I0-P0。
最后应该说明的是，结合上述实施例仅说明本发明的技术方案而非对其限制。所属领域的普通技术人员应当理解到，本领域技术人员可以对本发明的具体实施方式进行修改或者等同替换，但这些修改或变更均在申请待批的权利要求保护范围之中。

Claims (8)

1.一种蓄电池储能直流备用电源工作控制方法，其特征在于，所述蓄电池储能直流备用电源工作控制方法包括以下步骤：
步骤(1)：采集所述直流备用电源工作信息和外部线路供电信息；
步骤(2)：判断所述外部线路供电是否异常，若是，进入步骤(3)；若不是，进入步骤(6)；
步骤(3)：控制所述直流备用电源为所述外部线路供电；
步骤(4)：计算所述直流备用电源实际电能；
步骤(5)：根据当前输出功率计算供电时间，并进行显示；
步骤(6)：计算所述蓄电池的实际荷电状态；
步骤(7)：根据所述实际荷电状态确定是否给所述蓄电池进行充电；
步骤(8)：当所述蓄电池实际荷电状态达到荷电状态额定值，计算所述直流备用电源最大输出功率；
步骤(9)：判断所述最大输出功率是否小于最大输出功率参考值，若是，控制所述直流备用电源接入其它蓄电池或直流电源，以保证当所述外部线路供电异常时能够正常供电。
2.根据权利要求1所述的一种蓄电池储能直流备用电源工作控制方法，其特征在于，计算所述蓄电池的实际荷电状态的具体算法为：
Figure FDA0003210561860000011
其中Q为所述蓄电池容量，Q0为所述蓄电池标称容量。
3.根据权利要求2所述的一种蓄电池储能直流备用电源工作控制方法，其特征在于，计算所述直流备用电源最大输出功率的具体算法为：
所述直流备用电源最大输出功率为Pmax＝Ud0I0-P0，
若所述直流备用电源逆变器的触发角小于最小触发角，Ud0为所述直流备用电源整流站的极对地直流电压，I0为所述直流备用电源电流平均值，P0为电流增大前直流功率；
若所述直流备用电源逆变器的触发角不小于所述最小触发角，
(1)计算所述直流备用电源换流变压器阀侧空载线电压有效值U0；
(2)计算电流调整值I1；
(3)计算电流增大后所述整流站直流电压Ud1；
(4)计算电流增大后的交流母线电压幅值U1；
(5)计算电流增大后所述逆变器的触发角α1，并令I0＝I1，Ud0＝Ud1，α0＝α1；
(6)判断α0是否大于所述最小触发角，若是，返回(1)；若不是，所述直流备用电源最大输出功率为Pmax＝Ud0I0-P0。
4.根据权利要求3所述的一种蓄电池储能直流备用电源工作控制方法，其特征在于，计算所述直流备用电源换流变压器阀侧空载线电压有效值的算法为
Figure FDA0003210561860000021
其中α0为所述逆变器的触发角，N1为所述直流备用电源换流站每极中的6脉动换流器数，Xr1为所述整流站每相的换相电抗。
5.根据权利要求3所述的一种蓄电池储能直流备用电源工作控制方法，其特征在于，计算所述电流调整值的算法为I1＝I0+ΔI，其中ΔI为电流增量。
6.根据权利要求3所述的一种蓄电池储能直流备用电源工作控制方法，其特征在于，计算电流增大后所述整流站直流电压的算法为Ud1＝Ud0+RΔI，其中R为所述整流站直流回路电阻。
7.根据权利要求3所述的一种蓄电池储能直流备用电源工作控制方法，其特征在于，计算电流增大后的所述交流母线电压幅值的算法为
Figure FDA0003210561860000022
其中
Figure FDA0003210561860000023
m＝Jqδ(Pd1-Pd0)/(JpδJqv-JpvJqδ)，n＝Jpδ/(JpδJqv-JpvJqδ)，
Figure FDA0003210561860000024
Pd1＝Ud1I1，Pd0＝Ud0I0；
Figure FDA0003210561860000025
E为所述外部线路等值电势幅值，U为所述换流站母线电压幅值，X为所述外部线路的等效内阻，δ为所述外部线路等值电势相角超前换流站母线电压相角的功角差；
Figure FDA0003210561860000026
8.根据权利要求3所述的一种蓄电池储能直流备用电源工作控制方法，其特征在于，计算电流增大后所述逆变器的触发角的算法为
Figure FDA0003210561860000027
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