CN112436546A - 分布式混储电能质量调节装置及其一体云控制平台 - Google Patents

分布式混储电能质量调节装置及其一体云控制平台 Download PDF

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CN112436546A
CN112436546A CN202011268238.4A CN202011268238A CN112436546A CN 112436546 A CN112436546 A CN 112436546A CN 202011268238 A CN202011268238 A CN 202011268238A CN 112436546 A CN112436546 A CN 112436546A
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output end
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王捷
陆扬
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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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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Abstract

本发明公开了分布式混储电能质量调节装置及其一体云控制平台。分布式混储电能质量调节装置具有一般分布式电网储能装置和光储一体装置的优点，同时兼具无功补偿、谐波抑制和电压支撑的功能；通过一体云控制平台将各个分布式混储电能质量调节装置结合当作一个集中式混储电能质量调节装置进行控制运行，同时该平台还可根据不同支路负荷情况的不同，智能控制支路上分布式混储电能质量调节装置对各条支路潮流进行调节，对复杂故障进行推理解决，从而达到能量的最优控制。

Description

分布式混储电能质量调节装置及其一体云控制平台
技术领域
本发明属于智能电网技术领域，特别涉及了分布式混储电能质量调节装置及其一体云控制平台。
背景技术
面对日益增长的能源需求和全球节能减排的巨大挑战，大力发展电网储能技术已成为必然选择，同时也是智能配电网的发展趋势。
目前，常规的集中式储能装置储存能量大，但其前期投入大，成本回收周期长，占地面积大，后期维护成本过高。而一般的分布式电网储能装置虽然占地较小，前期投入小，但功能单一，只能单纯满足用户分时电价、削峰填谷的基本需求，不具有无功补偿、谐波抑制等功能，且无法根据负荷情况智能地调节电网潮流。
目前，已有的分布式光储一体装置虽然可以利用光伏发电的同时实现削峰填谷的功能，但该类装置缺少统一调度***，尽管个别设备已有工业监控云平台，但该平台仅能实现简单的数据收集监控功能，对电网用电量无法进行预估，对母线潮流无法进行智能调度控制，无法最大化利用光伏优势，进而导致能源的浪费。
目前的不间断电压装置，诸如UPS/DVR为给电网提供不断电的保障，均需要进行满容量冗余后备，设备成本高，占地面积大，能源利用率低。针对此问题，虽然市面上出现了通过自取电或另一独立母线取电的电压补偿装置，但此类设备均无法保障其取电侧电能质量，即取电侧也可能发生电压中断问题，这给用户负载，尤其是给电压敏感设备带来了极大的用电隐患。
发明内容
为了解决上述背景技术提到的技术问题，本发明提出了分布式混储电能质量调节装置及其一体云控制平台。
为了实现上述技术目的，本发明的技术方案为：
分布式混储电能质量调节装置，包括一级储能装置及其双向DC/DC变换器、二级储能装置及其双向DC/DC变换器、光伏电池板及其单向DC/DC变换器、第一DC/AC逆变装置及其并网装置、第二DC/AC逆变装置及其并网装置；所述一级储能装置的输出端与其双向DC/DC变换器的输入端连接，该双向DC/DC变换器的输出端与直流母线连接；所述二级储能装置的输出端与其双向DC/DC变换器的输入端连接，该双向DC/DC变换器的输出端与直流母线连接；所述光伏电池板的输出端与其单向DC/DC变换器的输入端连接，该单向DC/DC变换器的输出端与直流母线连接；所述第一DC/AC逆变装置的输出端与其并网装置的输入端连接，该并网装置的输出端与第一电网连接；所述第二DC/AC逆变装置的输出端与其并网装置的输入端连接，该并网装置的输出端与第二电网连接；所述第一DC/AC逆变装置与第二DC/AC逆变装置的直流侧直接连接。
基于上述分布式混储电能质量调节装置的一体云控制平台，包括云端服务器，所述一体云控制平台运行于云端服务器中，通过后台程序实时监听各分布式混储电能质量调节装置上传的数据，对各分布式混储电能质量调节装置上传的数据进行解码转换，然后根据数据类型判别是运行数据还是故障状态上报，若为运行数据，则实时在平台前端显示运行状态，同时根据各条母线运行情况进行相应的优化调度控制；若为故障状态上报，则首先载入故障信息，然后在预先由专业工程师导入的故障处理案例库中进行检索，若存在相同故障案例则重用应对策略，若不存在相同故障案例，则对检索出的最大相似故障案例进行推理修正，该修改策略的成功与失败均会记录在案例库，若策略失败则会向相关工程师告警，请求专业工程师对策略修正后重新载入案例库，等待下次类似故障进行调用，并对案例库相似冗余案例进行整理。
采用上述技术方案带来的有益效果：
1、本发明中的分布式混储电能质量调节装置，不仅仅可以实现常规分布式储能装置削峰填谷的基本功能，还具备无功补偿和谐波抑制的功能；同时结合一体云控制平台实时监测装置运行状况并记录各条母线负载用电情况，提高光伏能源利用效率，尽可能减少装置从电网取电量，为用户带来更多的经济效益。
2、本发明中的分布式混储电能质量调节装置结合一体云控制平台可作为一个集中式储能装置使用，但单独分布式装置占地面积小，无需在配电房扩充场地，前期投资小，成本回收快，维护成本低。
3、本发明中的分布式混储电能质量调节装置相较于传统UPS/DVR装置无需满容量后备，利用光伏发电、两级储能装置、取电母线多种方式进行能量后备，即彻底消除了由于取电母线发生故障导致装置无法进行电压支撑的隐患，提高了整体装置的鲁棒性，同时也减少了常规后备能量装置的体积与成本。
4、本发明中的一体云控制平台可以实时监测各装置所在母线状态，对各条母线运行情况进行针对性的储能、无功补偿、谐波抑制或电压支撑操作，动态平衡不同母线功率流，优化电力***能量流动，保障电力***电压质量，提高电力***稳定性。
5、本发明中的一体云控制平台不仅实现常规云平台数据收集检测的功能，同时根据预存的常规故障处理案例对当前装置上传上来的故障进行分析推理，并给出最优故障解决策略，复杂计算及决策云上处理，简单故障处理与指令计算由子装置完成，提高装置运行鲁棒性，减轻分布式子装置计算压力。
附图说明
图1为本发明中分布式混储电能质量调节装置拓扑结构图；
图2为本发明中分布式混储电能质量调节装置控制原理图；
图3为本发明中一体云控制平台的运行流程图；
图4为本发明的一种应用实施例示意图。
具体实施方式
以下将结合附图，对本发明的技术方案进行详细说明。
本发明设计了一种分布式混储电能质量调节装置，如图1所示，包括一级储能装置及其双向DC/DC变换器、二级储能装置及其双向DC/DC变换器、光伏电池板及其单向DC/DC变换器、第一DC/AC逆变装置及其并网装置、第二DC/AC逆变装置及其并网装置。所述一级储能装置的输出端与其双向DC/DC变换器的输入端连接，该双向DC/DC变换器的输出端与直流母线连接。所述二级储能装置的输出端与其双向DC/DC变换器的输入端连接，该双向DC/DC变换器的输出端与直流母线连接。所述光伏电池板的输出端与其单向DC/DC变换器的输入端连接，该单向DC/DC变换器的输出端与直流母线连接。所述第一DC/AC逆变装置的输出端与其并网装置的输入端连接，该并网装置的输出端与第一电网连接。所述第二DC/AC逆变装置的输出端与其并网装置的输入端连接，该并网装置的输出端与第二电网连接，所述第一DC/AC逆变装置与第二DC/AC逆变装置的直流侧直接连接。
两级储能装置的低压直流电通过其DC/DC变换器转变为直流母线上的高压直流电，光伏电池板产生的低压直流电通过其DC/DC变换器也转化为直流母线上的高压直流电，三者共同维持直流母线电压的稳定。DC/AC逆变装置将直流母线电压逆变为交流电，对相应母线进行电能质量问题的治理或能量的优化调度操作。
本发明中的分布式混储电能质量调节装置内部设有控制***，其控制原理图如图2所示，供电单元为其他各个功能单元提供电源支持，采样单元负责采集线路状态参量，核心计算控制单元负责简单指令的计算和基本故障保护指令的生成，驱动单元负责接收核心计算控制单元的指令并根据指令驱动装置中各部件，通讯单元负责本装置与一体云控制平台通信连接，直流母线控制单元负责实施监控直流母线运行状态，维持直流母线电压稳定。
本发明还结合上述分布式混储电能质量调节装置，设计了一体云控制平台，如图3所示，该一体云控制平台包括云端服务器，一体云控制平台运行于云端服务器中，通过后台程序实时监听各分布式混储电能质量调节装置上传的数据，对各分布式混储电能质量调节装置上传的数据进行解码转换，然后根据数据类型判别是运行数据还是故障状态上报，若为运行数据，则实时在平台前端显示运行状态，同时根据各条母线运行情况进行相应的优化调度控制；若为故障状态上报，则首先载入故障信息，然后在预先由专业工程师导入的故障处理案例库中进行检索，若存在相同故障案例则重用应对策略，若不存在相同故障案例，则对检索出的最大相似故障案例进行推理修正，该修改策略的成功与失败均会记录在案例库，若策略失败则会向相关工程师告警，请求专业工程师对策略修正后重新载入案例库，等待下次类似故障进行调用，并对案例库相似冗余案例进行整理，以提高案例库后续检索效率。
图4为本实施例提供的分布式混储电能质量调节装置及其一体云控制平台应用结构图，包括一级交流母线1、2、3，二级交流母线4、5、6，变压器7、8、9，分布式混储电能质量调节装置13、14，二级用户负载10、11、12，一体云控制平台15。分布式混储电能质量调节装置并接于两条不同的二级母线，可根据不同母线上用户负载特性的不同而灵活的进行运行（以用户负载10为非线性负载、用户负载11为无功负载，用户负载12三相不平衡为例）。
分布式混储电能质量调节装置13、14分别检测交流母线运行状况，装置13通过内部核心计算控制单元生成补偿谐波指令使装置动态补偿二级交流母线4的谐波电流。装置14通过内部控制单元生成无功电流和三相不平衡补偿指令使装置分别动态补偿二级交流母线5的无功电流同时抑制二级交流母线6的三相不平衡状况。与传统集中式补偿相比，分布式补偿更加灵活，可以更好地改善母线电能质量，提高电网运行稳定性。
当各级母线发生各类故障时，装置可迅速检测出运行异常状态，若仅为简单故障则由子装置自行处理，若为复杂计算或决策则上传一体云控制平台，请求云平台决策处理。下文以二级交流母线4失电、同时二级交流母线5有重载负荷投入为例进行说明。
当二级交流母线4发生故障失电，同时由于二级交流母线5有重载负荷投入导致母线电压下降，此时装置13、14迅速检测出二级交流母线4、5的异常状况并上传云端故障信息。当一体云控制平台接受到故障信息以后，首先检索是否存在相同案例策略，检索到有母线失电策略和重载投切策略以后，将二者进行重用，并根据现有二级交流母线6正常运行的状态进行修正案例，修正策略为装置14迅速弥补二级交流母线5功率缺口，按照光伏优先、一二级储能次之、自二级交流母线6取电最后的顺序为二级交流母线5提供缺失功率，以维持二级交流母线5的功率平衡。同时，装置13根据二级交流母线4功率需求提供电压支撑，直流侧取电顺序与装置14相同，尽可能缩短二级交流母线4停电时间，减少用户停电损失。一体云控制平台向两台装置下发相应控制指令，若母二级交流母线4、5恢复正常，则记录该成功应用案例，检索案例库是否有相似冗余案例，如有则将二者结合修正后重新存储，若无则结束此次决策过程。
本发明从底层看，分布式混储电能质量调节装置具有一般分布式电网储能装置和光储一体装置的优点，同时兼具无功补偿、谐波抑制和电压支撑的功能；从顶层看，通过本发明中的一体云控制平台将各个分布式混储电能质量调节装置结合当作一个集中式混储电能质量调节装置进行控制运行，同时该平台还可根据不同支路负荷情况的不同，智能控制支路上分布式混储电能质量调节装置对各条支路潮流进行调节，对复杂故障进行推理解决，从而达到能量的最优控制。
实施例仅为说明本发明的技术思想，不能以此限定本发明的保护范围，凡是按照本发明提出的技术思想，在技术方案基础上所做的任何改动，均落入本发明保护范围之内。

Claims (2)

1.分布式混储电能质量调节装置，其特征在于：包括一级储能装置及其双向DC/DC变换器、二级储能装置及其双向DC/DC变换器、光伏电池板及其单向DC/DC变换器、第一DC/AC逆变装置及其并网装置、第二DC/AC逆变装置及其并网装置；所述一级储能装置的输出端与其双向DC/DC变换器的输入端连接，该双向DC/DC变换器的输出端与直流母线连接；所述二级储能装置的输出端与其双向DC/DC变换器的输入端连接，该双向DC/DC变换器的输出端与直流母线连接；所述光伏电池板的输出端与其单向DC/DC变换器的输入端连接，该单向DC/DC变换器的输出端与直流母线连接；所述第一DC/AC逆变装置的输出端与其并网装置的输入端连接，该并网装置的输出端与第一电网连接；所述第二DC/AC逆变装置的输出端与其并网装置的输入端连接，该并网装置的输出端与第二电网连接；所述第一DC/AC逆变装置与第二DC/AC逆变装置的直流侧直接连接。
2.基于权利要求1所述分布式混储电能质量调节装置的一体云控制平台，其特征在于：包括云端服务器，所述一体云控制平台运行于云端服务器中，通过后台程序实时监听各分布式混储电能质量调节装置上传的数据，对各分布式混储电能质量调节装置上传的数据进行解码转换，然后根据数据类型判别是运行数据还是故障状态上报，若为运行数据，则实时在平台前端显示运行状态，同时根据各条母线运行情况进行相应的优化调度控制；若为故障状态上报，则首先载入故障信息，然后在预先由专业工程师导入的故障处理案例库中进行检索，若存在相同故障案例则重用应对策略，若不存在相同故障案例，则对检索出的最大相似故障案例进行推理修正，该修改策略的成功与失败均会记录在案例库，若策略失败则会向相关工程师告警，请求专业工程师对策略修正后重新载入案例库，等待下次类似故障进行调用，并对案例库相似冗余案例进行整理。
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