CN113922401A - 一种模块化双芯控制的储能逆变系统 - Google Patents
一种模块化双芯控制的储能逆变系统 Download PDFInfo
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- 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
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- H—ELECTRICITY
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Abstract
本发明提出了一种模块化双芯控制的储能逆变系统，所述储能逆变系统包括控制芯和管理芯；所述控制芯包括DSP芯片、双向逆变器、电池组、换相桥式电路、BMS管理模块以及采集模块，双向逆变器和采集模块分别连接DSP芯片，双向逆变器还分别接入电网和电池组，BMS管理模块与电池组连接，换相桥式电路的输入端连接DSP芯片，换相桥式电路的输出端接入电网；所述管理芯包括ARM处理器、继电器以及EMS模块，所述继电器和所述EMS模块分别连接所述ARM处理器；所述控制芯与所述管理芯之间设有模块接口，所述模块接口为活动插拔结构。本发明采用双芯控制机制，并使控制芯与管理芯即插即用，整合了电能质量质量功能和源网荷储协调，满足电网运维的不同需求。
Description
技术领域
本发明属于储能逆变器领域，尤其涉及一种模块化双芯控制的储能逆变系统。
背景技术
在由分布式电源、储能装置、能量转换装置、负荷、监控和保护装置等组成的微电网中，储能逆变器作为储能装置之一是微电网是必不可少的组成部分。储能逆变器由双向逆变器与电池组构成储能系统，能有效调控电力资源，平衡昼夜及不同季节的用电差异，保障电网安全，是可再生能源应用的重要前提和实现电网互动化管理的重要手段。储能逆变器适用于各种需要动态储能的应用场合，在电能富裕的时候将电网的交流电变换成直流电存储在电池组中实现电能储能，电能不富裕的时候将电池组中存储的电能逆变为交流电后向电网输出进行补偿。
传统的储能逆变器仅具有储能功能，没有电能质量治理与和源网荷储协调的进阶功能，即无法根据电源、电网、负荷和储能之间的运行情况调整储能逆变器的逆变策略，通常需要额外安装其他设备来实现上述进阶功能，存在设备冗余的缺点。
发明内容
为了解决现有技术中存在的缺点和不足，本发明提出了一种模块化双芯控制的储能逆变系统，所述储能逆变系统包括控制芯和管理芯；
所述控制芯包括DSP芯片、双向逆变器、电池组、换相桥式电路、BMS管理模块以及采集模块，双向逆变器和采集模块分别连接DSP芯片，双向逆变器还分别接入电网和电池组，BMS管理模块与电池组连接，换相桥式电路的输入端连接DSP芯片，换相桥式电路的输出端接入电网；
所述管理芯包括ARM处理器、继电器以及EMS模块，所述继电器和所述EMS模块分别连接所述ARM处理器；
所述控制芯与所述管理芯之间设有模块接口，所述模块接口为活动插拔结构，所述管理芯未插入模块接口时储能逆变系统为单模块控制模式，所述管理芯插入模块接口时储能逆变系统为双模块控制模式。
可选的，所述储能逆变系统为单模块控制模式时，所述采集模块基于预设循环周期采集电网运行数据，所述DSP芯片用于根据电网运行数据控制双向逆变器中的晶体管，调整双向逆变器的输出波形。
可选的，所述换相桥式电路包括若干个可关断的开关器件，所述换相桥式电路的一端并联在电网上，另一端连接DSP芯片，用于通过DSP芯片控制开关器件的通断以调节换相桥式电路的电网侧输出电压的幅值和相位，对电网进行无功补偿。
可选的，所述储能逆变系统为双模块控制模式时，DSP芯片和ARM处理器通过BUS总线进行通信。
可选的，所述储能逆变系统为双模块控制模式时，DSP芯片将电网运行数据发送给ARM处理器，ARM处理器将电网运行数据转发给EMS模块，EMS模块根据电网运行数据将电网的源网荷储协调策略发送给ARM处理器，ARM处理器根据源网荷储协调策略控制继电器执行负荷的投切。
可选的，所述继电器执行负荷投切后，ARM处理器在采集模块的下一个预设循环周期将执行结果发送给DSP芯片。
可选的，所述管理芯还包括无功补偿模块接口，所述无功补偿模块接口设置在ARM处理器连接，用于在换相桥式电路无法满足电网的补偿需求时，通过接入电容器来对电网进行无功补偿。
可选的，所述BMS管理模块包括公共库、自适应接口和控制单元，所述公共库中存储有与电池组类型对应的接入标准协议，所述自适应接口用于接入电池组，所述控制单元用于根据接入标准协议调整自适应接口处的工作参数。
可选的，所述接入标准协议包括各类型电池组在充放电时的工作参数，所述工作参数包括电压、电流、输入功率、输出功率、容量以及适用温度。
本发明提供的技术方案带来的有益效果是：
相比于传统的储能逆变器的单一储能功能，本发明提出的储能逆变系统采用双芯控制机制，整合了电能质量质量功能和源网荷储协调，减少多余设备投资，缓解设备安装时的空间不足的问题。同时通过模块化的设计使控制芯与管理芯即插即用，能够灵活组合以满足电网运维的不同需求。
附图说明
为了更清楚地说明本发明的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一实施例提出的一种模块化双芯控制的储能逆变系统的结构框图；
图2为储能逆变系统为单模块控制模式的工作流程示意图；
图3为储能逆变系统为双模块控制模式的工作流程示意图。
具体实施方式
为使本发明的结构和优点更加清楚，下面将结合附图对本发明的结构作进一步地描述。
实施例一
如图1所示，本实施例提出了一种模块化双芯控制的储能逆变系统，所述储能逆变系统包括控制芯和管理芯；
所述控制芯包括DSP芯片、双向逆变器、电池组、换相桥式电路、BMS管理模块以及采集模块，双向逆变器和采集模块分别连接DSP芯片，双向逆变器还分别接入电网和电池组，BMS管理模块与电池组连接，换相桥式电路的输入端连接DSP芯片，换相桥式电路的输出端接入电网；
所述管理芯包括ARM处理器、继电器以及EMS模块，所述继电器和所述EMS模块分别连接所述ARM处理器；
所述控制芯与所述管理芯之间设有模块接口，所述模块接口为活动插拔结构，所述管理芯未插入模块接口时储能逆变系统为单模块控制模式，所述管理芯插入模块接口时储能逆变系统为双模块控制模式。
本实施例提出的储能逆变系统通过控制芯和管理芯实现双芯控制机制，将逆变器的储能功能和EMS模块的源网荷储协调功能结合在一起，相较于传统的储能逆变器具有了电能质量治理功能。此外，控制芯和管理芯的模块接口为活动插拔结构，使储能逆变系统具有模块化设计功能，当不需要控制芯的源网荷储协调功能时，管理芯可独立工作，具有传统储能逆变器的功能，当需要源网荷储协调功能时，将控制芯插入模块接口，相较于当下产品的非模块化设计，本实施例提出的储能逆变系统通过双芯控制将基础功能和进阶功能进行模块化区分，这样就可以根据用户需要来配置不同的模块需求，可以降低产品的成本同时，也方便设备的二次拓展，无需再次替换设备，降低了设备的购买成本。
在本实施例中，所述储能逆变系统为单模块控制模式时，所述采集模块基于预设循环周期采集电网运行数据，所述DSP芯片用于根据电网运行数据控制双向逆变器中的晶体管，调整双向逆变器的输出波形。所述换相桥式电路包括若干个可关断的开关器件，所述换相桥式电路的一端经电抗器并联在电网上，另一端连接DSP芯片，用于通过DSP芯片控制开关器件的通断以调节换相桥式电路的电网侧输出电压的幅值和相位，对电网进行无功补偿。
单模块控制模式是以DSP芯片为核心的控制单元，此模式下可以完成储能这一基本功能，在一个预设循环周期中的事件流程如图2所示，储能逆变系统在初始化之后，每一个预设循环周期都相应建立一个主循环，在主循环中采集模块进行数据采集，获得电网运行数据，本实施例中电网运行数据包括遥测信息和遥信信息，能够反映电网的负载情况。DSP芯片以us级的速度对电网运行数据进行事件判断并生成逆变器策略，根据逆变器策略控制双向逆变器中晶体管的开断进行PWM调制，通过调制的脉冲信号将电能质量和储能的工作按照策略分配的百分比进行调制解调，进而调整逆变器的输出波形，完成储能功能，同时通过换相桥式电路调整电网交流侧输出电压的幅值和相位，完成电能质量治理功能。
本实施例通过控制芯将储能逆变器的基础功能与电能质量治理功能整合，减少了多余设备的投入。
在本实施例中，所述储能逆变系统为双模块控制模式时，DSP芯片通过BUS总线将电网运行数据发送给ARM处理器，ARM处理器将电网运行数据转发给EMS模块，EMS模块根据电网运行数据将电网的源网荷储协调策略发送给ARM处理器，ARM处理器根据源网荷储协调策略控制继电器执行负荷的投切。
在本实施例中ARM处理器采用ARM9芯片，能够处理日益增长的IOT事件，如协调光伏机组、充电桩、切负荷设备等源网荷储设备。源网荷储协调策略是指电源、电网、负荷与储能四部分通过多种交互手段，更经济、高效、安全地提高电力系统的功率动态平衡能力，从而实现能源资源最大化利用的运行模式和技术，该策略是包含“电源、电网、负荷、储能”整体解决方案的运营策略。本实施例中通过EMS模块实现源网荷储协调的功能，所述EMS模块上加载有能量管理系统(Energy Manage System，EMS)，EMS是在SCADA系统的功能之上，根据电网的遥测信息和遥信信息，对电网进行科学的安全、经济分析，以便电网运行质量更加优质、稳定的高级应用软件。
图3为储能逆变系统处于双模块控制模式下的事件流程示意图，同样首先进行初始化，当模块接口激活时，储能逆变系统检测到管理芯的工作状况，并将属于主循环的部分纳入到事件管理，而采集模块采集的信息也将通过BUS总线传输至管理芯的ARM处理器进行其下属业务的应用，本实施例中下属的应用即由ARM通过控制继电器协调负荷的投切，以执行ERM模块的源网荷储协调策略。而其应用的反馈将再次通过BUS总线管理芯的DSP芯片，使采集模块在下一个预设循环周期时捕获上述反馈来校准逆变器策略，在这样一个反馈的循环中，ERM模块对协调作用不会影响当前循环周期内DSP芯片的逆变策略，同时不会增加DSP芯片的资源利用，而是转变了一种工作模式以ARM处理器分担进阶功能，管理芯可根据控制芯的反馈及时调整下一个循环周期的逆变策略。
在双模块控制模式下，由于在控制芯的基础上附加了管理芯，使DSP芯片专注于对逆变器的控制而不再被其他工作占用进程，使其反应速度更快，效率更高。而管理芯则为设备日常IOT通讯，并为其他开关控制及源网荷储协调做出响应，两者之间互不干扰，却又相辅相成。
此外，控制芯和管理芯为模块化设计，具有即插即用的特点，如果不需要源网荷储等其他高级的控制功能可以将这个管理芯去除，则只有控制芯自主独立运行，按照指定的逆变策略进行常规的储能工作。当需要进阶控制时，则可以直接把控制芯插入到管理芯上，即可完成对控制芯的安装，后续控制的源网荷储功能就可以实现。
在本实施例中，与继电器相连的负荷包括低压台区内的光伏机组、充电桩等新能源设备。
在本实施例中，所述管理芯还包括无功补偿模块接口，所述无功补偿模块接口设置在ARM处理器连接，用于在换相桥式电路无法满足电网的补偿需求时，通过接入电容器来对电网进行无功补偿。因此能够提供无源的功率因数补偿，来维持储能逆变系统的功能实现。
所述控制芯还包括与电池组连接的BMS管理模块，所述BMS管理模块包括公共库和自适应接口，所述公共库中存储有接入标准协议，所述自适应接口用于根据电池组的类型调用接入标准协议，基于接入标准协议管理不同类型的电池组的充放电功率，从而完成电池组的接入。所述接入标准协议包括各类型电池组在充放电时的工作参数，所述工作参数包括电压、电流、输入功率、输出功率、容量以及适用温度。在本实施例中，BMS管理模块中存储的接入标准协议支持多种48V直流类型电池，如锂电池和铅酸电池，用户可以自由组合容量大小，最高支持100000Ah的电池组，突破了以往储能逆变器对电池种类的单一需要的限制。
自适应接口首先识别待接入的电池组的类型，随后查询公共库中是否有与该类型对应的接入标准协议，若有与该类型对应的接入标准协议，则控制单元根据所述接入标准协议控制自适应接口的工作参数，完成电池组的接入，实现防止电池出现过充电和过放电、延长电池的使用寿命的功能。若未查询到与该类型对应的接入标准协议，则发出电池组类型不支持的告警信息，拒绝电池组接入。
除此之外，BMS管理模块还包括电池信息采集单元和显示单元，其中电池信息采集单元与控制芯中的电池组连接，通过电池信息采集单元获取电池组的端电压、荷电状态等电池信息。显示单元、电池信息采集单元分别与控制单元连接，控制单元在接收到电池信息采集单元收集的电池信息后，及时发现电池组是否有异常的充放电情况并进行修正，同时将电池组的电池信息发送至显示单元。
上述实施例中的各个序号仅仅为了描述，不代表各部件的组装或使用过程中的先后顺序。
以上所述仅为本发明的实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
Claims (9)
1.一种模块化双芯控制的储能逆变系统，其特征在于，所述储能逆变系统包括控制芯和管理芯；
所述控制芯包括DSP芯片、双向逆变器、电池组、换相桥式电路、BMS管理模块以及采集模块，双向逆变器和采集模块分别连接DSP芯片，双向逆变器还分别接入电网和电池组，BMS管理模块与电池组连接，换相桥式电路的输入端连接DSP芯片，换相桥式电路的输出端接入电网；
所述管理芯包括ARM处理器、继电器以及EMS模块，所述继电器和所述EMS模块分别连接所述ARM处理器；
所述控制芯与所述管理芯之间设有模块接口，所述模块接口为活动插拔结构，所述管理芯未插入模块接口时储能逆变系统为单模块控制模式，所述管理芯插入模块接口时储能逆变系统为双模块控制模式。
2.根据权利要求1所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述储能逆变系统为单模块控制模式时，所述采集模块基于预设循环周期采集电网运行数据，所述DSP芯片用于根据电网运行数据控制双向逆变器中的晶体管，调整双向逆变器的输出波形。
3.根据权利要求1所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述换相桥式电路包括若干个可关断的开关器件，所述换相桥式电路的一端并联在电网上，另一端连接DSP芯片，用于通过DSP芯片控制开关器件的通断以调节换相桥式电路的电网侧输出电压的幅值和相位，对电网进行无功补偿。
4.根据权利要求1所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述储能逆变系统为双模块控制模式时，DSP芯片和ARM处理器通过BUS总线进行通信。
5.根据权利要求1所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述储能逆变系统为双模块控制模式时，DSP芯片将电网运行数据发送给ARM处理器，ARM处理器将电网运行数据转发给EMS模块，EMS模块根据电网运行数据将电网的源网荷储协调策略发送给ARM处理器，ARM处理器根据源网荷储协调策略控制继电器执行负荷的投切。
6.根据权利要求5所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述继电器执行负荷投切后，ARM处理器在采集模块的下一个预设循环周期将执行结果发送给DSP芯片。
7.根据权利要求1所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述管理芯还包括无功补偿模块接口，所述无功补偿模块接口设置在ARM处理器连接，用于在换相桥式电路无法满足电网的补偿需求时，通过接入电容器来对电网进行无功补偿。
8.根据权利要求1所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述BMS管理模块包括公共库、自适应接口和控制单元，所述公共库中存储有与电池组类型对应的接入标准协议，所述自适应接口用于接入电池组，所述控制单元用于根据接入标准协议调整自适应接口处的工作参数。
9.根据权利要求8所述的一种模块化双芯控制的储能逆变系统，其特征在于，所述接入标准协议包括各类型电池组在充放电时的工作参数，所述基础工作参数包括电压、电流、输入功率、输出功率、容量以及适用温度。
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