CN110571915A - An intelligent energy storage power supply vehicle uninterruptible power supply system device and control method thereof - Google Patents
An intelligent energy storage power supply vehicle uninterruptible power supply system device and control method thereof Download PDFInfo
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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
- 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
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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
- H02J9/08—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 requiring starting of a prime-mover
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- Stand-By Power Supply Arrangements (AREA)
Abstract
一种智能型储能电源车不间断供电系统装置，将市电或UPS电源经过单个双向变流器供給应急负载，采用双向变流器PCS1台和单向变流器PIS1台配合使用，双向变流器PCS通过自动转化开关ATS与供电电源相连，储能电池组通过单向变流器PIS经静态开关与应急负载相连，工作过程中储能电池组与单向变流器PIS不间断挂网运行，通过能量管理系统EMS控制来双向变流器PCS输出功率，灵活对储能电池组进行充电以及提供功率给单向变流器PIS，实现应急负载不间断供电以及零毫秒切换。还提供一种智能型储能电源车不间断供电系统装置在不同工作模式下的控制策略，按照既定的逻辑及控制算法实现系统各模式间的自动运行及异常保护。An intelligent uninterruptible power supply system device for energy storage power supply vehicles, which supplies city power or UPS power supply to emergency loads through a single bidirectional converter. The current converter PCS is connected to the power supply through the automatic transfer switch ATS, and the energy storage battery pack is connected to the emergency load through the one-way converter PIS through the static switch. In operation, the bidirectional converter PCS outputs power through the energy management system EMS control, flexibly charges the energy storage battery pack and provides power to the unidirectional converter PIS, achieving uninterrupted power supply for emergency loads and zero-millisecond switching. The invention also provides a control strategy for an uninterruptible power supply system device of an intelligent energy storage power supply vehicle in different working modes, which realizes automatic operation and abnormal protection between the various modes of the system according to the established logic and control algorithm.
Description
技术领域technical field
本发明涉及新能源设备技术领域，具体涉及一种智能型储能电源车不间断供电系统装置及其控制方法。The invention relates to the technical field of new energy equipment, in particular to an uninterrupted power supply system device of an intelligent energy storage power supply vehicle and a control method thereof.
背景技术Background technique
随着当今社会各行各业投入高敏感电力电子设备不断增加，越来越多的用户对供电可靠性要求不断提高。大型活动场所如政府机构、重要活动日、大型医院等，一旦发生停电事故，带来的后果将不可想象，不仅破坏了正常生活秩序，带来巨大的经济损失，更严重的会影响到社会的正常秩序。因此，为了保障重点负荷的不间断供电，减少相关损失，开展智能型储能电源车不间断供电系统装置的研究具有重要的意义。With the increasing investment in highly sensitive power electronic equipment from all walks of life in today's society, more and more users have increasing requirements for power supply reliability. Large-scale event venues such as government agencies, important event days, large hospitals, etc., once a power outage occurs, the consequences will be unimaginable, not only destroying the normal life order, bringing huge economic losses, and more seriously affecting the society. normal order. Therefore, in order to ensure the uninterrupted power supply of key loads and reduce related losses, it is of great significance to carry out research on the uninterruptible power supply system of intelligent energy storage power vehicles.
目前电力部门广泛使用的应急电源车由柴油机发电和以铅酸电池为后备的应急电源系统。但柴油机发电的缺点是不能长时间空载运行、启动时间较长、供电质量差、废气污染严重，不能做到无缝切换。而铅酸电池则存在重金属污染、能量比低，还存在充放电次数受限等缺点。对于近几年选择飞轮储能作为UPS移动应急电源车，飞轮UPS受制于机械储能，且能够提供的电力应急时间较短，并且价格昂贵。At present, emergency power supply vehicles widely used in the power sector are powered by diesel engines and emergency power supply systems backed by lead-acid batteries. However, the disadvantage of diesel power generation is that it cannot run without load for a long time, the start-up time is long, the quality of power supply is poor, the exhaust gas pollution is serious, and it cannot be seamlessly switched. The lead-acid battery has the disadvantages of heavy metal pollution, low energy ratio, and limited number of charge and discharge times. For the choice of flywheel energy storage as the UPS mobile emergency power supply vehicle in recent years, the flywheel UPS is subject to mechanical energy storage, and can provide power for a short emergency time and is expensive.
传统保供电采用的方式为市电加上发电车，通过整流、逆变方式供给应急负载，这种方式都会存在市电失去的时候，在柴油发电机或储能电池组起动的过程中，中间有一段时间的间隔断电，这种现象对一些非常重要的负荷，比如说，电力电子装置或者重要敏感器件都会有所反应，将会造成很严重的后果。采用不间断供电系统装置及相关控制方法，它具有启动时间短，能够实现零毫秒不间断的切换。从而保障设备的不间断运行，将事故停电给生产生活带来的影响降低到零。The traditional way of ensuring power supply is to add a generator car to the mains, and supply emergency loads through rectification and inverter. This method will always exist when the mains is lost. During the starting process of the diesel generator or energy storage battery pack, the middle There is a period of time interval power failure. This phenomenon will react to some very important loads, such as power electronic devices or important sensitive devices, and will cause serious consequences. Adopting the uninterruptible power supply system device and the related control method, it has a short start-up time and can realize zero millisecond uninterrupted switching. In order to ensure the uninterrupted operation of the equipment, the impact of accidental power outages on production and life is reduced to zero.
发明内容SUMMARY OF THE INVENTION
针对目前应急电保供电源车存在的不足，本发明提供一种智能型储能电源车不间断供电系统装置及其控制方法。基于大多数应急电源车采用将市电或UPS电源经过单个双向变流器供給应急负载，储能电池装置作为备用电源，本发明采用双向变流器(PCS)1台和单向变流器(PIS)1台配合使用，其中储能电池组通过单向变流器PIS不间断与应急负载相连，不论市电是否正常，储能电池组和单向变流器PIS都处于工作状态，实现应急负载不间断供电以及零毫秒切换。同时，本发明还针对一种智能型储能电源车不间断供电系统装置设计了其不同工作模式下相关控制策略，按照既定的逻辑及控制算法实现系统各模式间的自动运行及异常保护。Aiming at the shortcomings of the current emergency power supply vehicle, the present invention provides an uninterrupted power supply system device of an intelligent energy storage power supply vehicle and a control method thereof. Based on the fact that most emergency power supply vehicles use the mains or UPS power supply to supply the emergency load through a single bidirectional converter, and the energy storage battery device is used as a backup power supply, the present invention adopts a bidirectional converter (PCS) and a unidirectional converter ( PIS) 1 unit is used together, in which the energy storage battery pack is continuously connected to the emergency load through the one-way converter PIS. Regardless of whether the mains is normal, the energy storage battery pack and the one-way converter PIS are in working condition to realize emergency Uninterrupted power supply to the load and zero millisecond switching. At the same time, the present invention also designs relevant control strategies under different working modes for an intelligent energy storage power supply vehicle uninterruptible power supply system device, and realizes automatic operation and abnormal protection between the various modes of the system according to the established logic and control algorithm.
本发明采用的技术方案如下：The technical scheme adopted in the present invention is as follows:
一种智能型储能电源车不间断供电系统装置，包括柴油机供电380V三相电、储能电池系统、双向变流器PCS、单向变流器PIS、静态开关、自动转化开关ATS以及相关开关K1-K6；An uninterruptible power supply system device for an intelligent energy storage power supply vehicle, including a diesel engine power supply 380V three-phase power, an energy storage battery system, a bidirectional converter PCS, a unidirectional converter PIS, a static switch, an automatic transfer switch ATS and related switches K1-K6;
其中，一条配电线路为市电380V和柴油机供电380V连接到自动转换开关ATS输入侧；自动转换开关ATS输出端与开关K1一端相连；开关K1另一端与双向变流器PCS交流侧连接；双向变流器PCS直流侧分别与储能电池组输入端、开关K2一端连接；开关K2另一端与单向变流器PIS直流侧连接；同时储能电池组输出侧与单向变流器PIS直流侧相连；单向变流器PIS交流侧与静态开关输入侧相连；静态开关输出侧分别于开关K3一端、K5一端连接；K3另一端与应急负载连接；K5另一端与第三条配电线路相连；第二条配电线路为自动转换开关ATS与旁路检修开关K6一端相连；K6另一端与静态开关输入侧相连；第三配电线路自动转化开关ATS输出端与开关K4一端相连；开关K4另一端与车辆负载相连。Among them, a power distribution line is connected to the input side of the automatic transfer switch ATS for the mains 380V and the diesel engine power supply 380V; the ATS output end of the automatic transfer switch is connected to one end of the switch K1; the other end of the switch K1 is connected to the AC side of the bidirectional converter PCS; The DC side of the converter PCS is respectively connected with the input end of the energy storage battery pack and one end of the switch K2; the other end of the switch K2 is connected with the DC side of the one-way converter PIS; at the same time, the output side of the energy storage battery pack is connected with the DC side of the one-way converter PIS. The AC side of the one-way converter PIS is connected to the input side of the static switch; the output side of the static switch is connected to one end of the switch K3 and one end of K5 respectively; the other end of K3 is connected to the emergency load; the other end of K5 is connected to the third power distribution line The second distribution line is the automatic transfer switch ATS and one end of the bypass maintenance switch K6 is connected; the other end of K6 is connected to the input side of the static switch; the output end of the automatic transfer switch ATS of the third distribution line is connected to one end of the switch K4; the switch The other end of K4 is connected to the vehicle load.
进一步，所述装置还包括能量管理系统EMS；所述能量管理系统分别于双向变流器PCS、单向变流器PIS、储能电池系统通过CAN相连。Further, the device further includes an energy management system EMS; the energy management system is respectively connected to the bidirectional converter PCS, the unidirectional converter PIS, and the energy storage battery system through CAN.
再进一步，所述装置还包括电池管理系统；所述电池管理系统与储能电池组、充放电保护电路通信连接。Still further, the device further includes a battery management system; the battery management system is connected in communication with the energy storage battery pack and the charge-discharge protection circuit.
一种智能型储能电源车不间断供电系统装置的控制方法，包括市电运行模式、电池独立供电模式、相关设备维修状态供电模式和储能电池系统维护模式，其中：A control method for an uninterruptible power supply system device of an intelligent energy storage power supply vehicle, comprising a mains operation mode, a battery independent power supply mode, a related equipment maintenance state power supply mode, and an energy storage battery system maintenance mode, wherein:
所述的市电运行模式，用于在市电正常的情况下供电，在市电装置后，由市电经自动转换开关ATS提供电源给直流母线，根据单向变流器PIS输出功率调整双向变流器PCS输出功率，若PIS输出功率小于设定值且磷酸铁锂储能电池荷电量小于荷电量设定值时，PCS以设定值功率给电池充电。过程中当发现PIS所带负载发生过大变化时，及时调整双向变流器PCS输出功率的分配，以更好地满足应急负载用电需求；The mains operation mode is used to supply power when the mains is normal. After the mains is installed, the mains supply power to the DC bus through the automatic transfer switch ATS, and the bidirectional power is adjusted according to the output power of the unidirectional converter PIS. The output power of the converter PCS, if the output power of the PIS is less than the set value and the charge of the lithium iron phosphate energy storage battery is less than the set value of the charge capacity, the PCS charges the battery with the set power. In the process, when it is found that the load carried by the PIS has changed too much, the distribution of the output power of the bidirectional converter PCS should be adjusted in time to better meet the power demand of the emergency load;
所述的电池独立供电模式，用于当市电发生断电或故障时，为保证对应急负载不间断供电而采用电池独立供电；当市电掉电后，所有负载供电将切换由储能电池组经单向变流器PIS输出，无缝接替市电供给负载，同时自动转化开关ATS切换到备用电源，并检查备用电源电压，如电压达不到要求，双向变流器PCS退出运行，若达到要求，双向变流器PCS工作，以设定输出功率向直流母线供电，从而实现由柴油机发电充电电源，保证负载正常运行；双向变流器PCS实时跟踪市电状态，当市电恢复后，将发电机输入电源通过自动转换开关ATS切换到市电工作状态，同时控制发电机停止工作，在整个切换过程中，由于电池组、单向变流器PIS始终处于无缝输出状态的挂网运行，确保了零毫秒切换。The battery independent power supply mode is used to ensure the uninterrupted power supply to the emergency load when the mains power is cut off or fails. The group is output by the one-way converter PIS, and seamlessly replaces the mains supply load. At the same time, the automatic transfer switch ATS switches to the standby power supply, and checks the standby power supply voltage. If the voltage does not meet the requirements, the two-way converter PCS is out of operation. When the requirements are met, the bidirectional converter PCS works to supply power to the DC bus with the set output power, so as to realize the charging power generated by the diesel engine and ensure the normal operation of the load; the bidirectional converter PCS tracks the state of the mains in real time. The generator input power is switched to the mains working state through the automatic transfer switch ATS, and the generator is controlled to stop working at the same time. During the whole switching process, because the battery pack and the one-way converter PIS are always in a seamless output state. , which ensures zero millisecond switching.
所述的相关设备维修状态供电模式，用于在逆变装置发生故障的情况下供电，当不间断供电系统装置发生故障后，闭合旁路检修开关K6，静态开关切换到第二条配电线路，保证负载不间断供电；The power supply mode in the maintenance state of the related equipment is used to supply power when the inverter device fails. When the uninterruptible power supply system device fails, the bypass maintenance switch K6 is closed, and the static switch is switched to the second power distribution line. , to ensure uninterrupted power supply to the load;
所述的储能电池系统维护模式，用于在长时间静置状态下对储能电池维护的控制，ATS启动柴油发电机，自动转换开关ATS自动切换到柴油发电机侧，闭合开关K1，接入双向变流器PCS交流侧，通过PCS对储能电池组进行充电；同时闭合开关K5，储能电池组通过PIS对车内负载进行放电。The maintenance mode of the energy storage battery system is used to control the maintenance of the energy storage battery in a long-term static state, the ATS starts the diesel generator, the automatic transfer switch ATS automatically switches to the diesel generator side, closes the switch K1, and connects the into the AC side of the bidirectional converter PCS, and the energy storage battery pack is charged through the PCS; at the same time, the switch K5 is closed, and the energy storage battery pack discharges the in-vehicle load through the PIS.
本发明的有益效果是：The beneficial effects of the present invention are:
1、本发明针对现有应急电源车无法做到不间断供电、零毫秒切换，且使用过程中空气污染严重、噪声大等问题，设计了两台变流器连接电路，通过对其灵活控制输出功率，实现了一种能够不间断供电且能零毫秒切换技术的不间断供电电源车，极大改善了现有应急电源车的性能。1. Aiming at the problems that the existing emergency power supply vehicle cannot achieve uninterrupted power supply and zero-millisecond switching, and the air pollution is serious and the noise is large during use, the present invention designs two converter connection circuits, and flexibly controls the output of them. The power supply realizes an uninterruptible power supply vehicle capable of uninterrupted power supply and zero-millisecond switching technology, which greatly improves the performance of the existing emergency power supply vehicle.
2、本发明针对应急电源车不同工作模式以及工作场景，提出一种智能型储能电源车不间断供电系统装置针对不同工作环境的控制策略，实现应急电源车不同工作模式间的不间断供电相互切换。2. Aiming at different working modes and working scenarios of the emergency power supply vehicle, the present invention proposes a control strategy for the uninterruptible power supply system device of an intelligent energy storage power supply vehicle for different working environments, so as to realize the mutual uninterrupted power supply between different working modes of the emergency power supply vehicle. switch.
附图说明Description of drawings
图1为本发明的一种智能型储能电源车不间断供电系统装置的拓扑图；1 is a topology diagram of an uninterruptible power supply system device for an intelligent energy storage power supply vehicle according to the present invention;
图2为本发明实施例中市电运行模式下拓扑图；FIG. 2 is a topology diagram in the mains operation mode in the embodiment of the present invention;
图3为本发明实施例中电池组独立运行模式下工作拓扑图；3 is a working topology diagram of a battery pack in an independent operation mode according to an embodiment of the present invention;
图4为本发明实施例中不间断供电系统装置维修模式下工作拓扑图；4 is a working topology diagram of an uninterruptible power supply system device in a maintenance mode according to an embodiment of the present invention;
图5为本发明实施例中电池维护模式下工作拓扑图；5 is a working topology diagram in a battery maintenance mode according to an embodiment of the present invention;
图6为一种智能型储能电源车不间断供电系统装置市电工作模式下控制方法流程示意图；FIG. 6 is a schematic flowchart of a control method of an uninterruptible power supply system device for an intelligent energy storage power supply vehicle in a mains working mode;
图7为一种智能型储能电源车不间断供电系统装置储能电池独立工作模式下控制方法流程示意图；7 is a schematic flowchart of a control method in an independent operation mode of an energy storage battery of an uninterruptible power supply system device of an intelligent energy storage power supply vehicle;
图8为一种智能型储能电源车不间断供电系统装置电池组维护模式下控制方法流程示意图。FIG. 8 is a schematic flowchart of a control method in a battery pack maintenance mode of an uninterruptible power supply system device of an intelligent energy storage power supply vehicle.
具体实施方式Detailed ways
附图仅用于示例性说明，不能理解为对本专利的限制。下面结合附图和实施例对本发明的技术方案作进一步的说明。The drawings are for illustrative purposes only and should not be construed as limiting the patent. The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.
参照图1～图8，一种智能型储能电源车不间断供电系统装置，包括双电源自动转换开关ATS、双向变流器PCS、单向变流器PIS、储能电池系统、静态转化开关及开关K1-K6。Referring to Figures 1 to 8, an intelligent energy storage power supply vehicle uninterruptible power supply system device includes a dual power automatic transfer switch ATS, a bidirectional converter PCS, a unidirectional converter PIS, an energy storage battery system, and a static transfer switch. and switches K1-K6.
其中，一条配电线路为市电380V和柴油机供电380V连接到自动转换开关ATS输入侧；自动转换开关ATS输出端与开关K1一端相连；开关K1另一端与双向变流器PCS交流侧连接；双向变流器PCS直流侧分别与储能电池组输入端、开关K2一端连接；开关K2另一端与单向变流器PIS直流侧连接；同时储能电池组输出侧与单向变流器PIS直流侧相连；单向变流器PIS交流侧与静态开关输入侧相连；静态开关输出侧分别于开关K3一端、K5一端连接；K3另一端与应急负载连接；K5另一端与第三条配电线路相连；第二条配电线路为自动转换开关ATS与旁路检修开关K6一端相连；K6另一端与静态开关输入侧相连；第三配电线路自动转化开关ATS输出端与开关K4一端相连；开关K4另一端与车辆负载相连。Among them, a power distribution line is connected to the input side of the automatic transfer switch ATS for the mains 380V and the diesel engine power supply 380V; the ATS output end of the automatic transfer switch is connected to one end of the switch K1; the other end of the switch K1 is connected to the AC side of the bidirectional converter PCS; The DC side of the converter PCS is respectively connected with the input end of the energy storage battery pack and one end of the switch K2; the other end of the switch K2 is connected with the DC side of the one-way converter PIS; at the same time, the output side of the energy storage battery pack is connected with the DC side of the one-way converter PIS. The AC side of the one-way converter PIS is connected to the input side of the static switch; the output side of the static switch is connected to one end of the switch K3 and one end of K5 respectively; the other end of K3 is connected to the emergency load; the other end of K5 is connected to the third power distribution line The second distribution line is the automatic transfer switch ATS and one end of the bypass maintenance switch K6 is connected; the other end of K6 is connected to the input side of the static switch; the output end of the automatic transfer switch ATS of the third distribution line is connected to one end of the switch K4; the switch The other end of K4 is connected to the vehicle load.
进一步，所述装置还包括能量管理系统EMS；所述能量管理系统分别于双向变流器PCS、单向变流器PIS、储能电池系统通过CAN相连。Further, the device further includes an energy management system EMS; the energy management system is respectively connected to the bidirectional converter PCS, the unidirectional converter PIS, and the energy storage battery system through CAN.
再进一步，所述装置还包括电池管理系统；所述电池管理系统与储能电池组、充放电保护电路通信连接。Still further, the device further includes a battery management system; the battery management system is connected in communication with the energy storage battery pack and the charge-discharge protection circuit.
本实施例的供电系统结构简单、成本低，增加了移动电源车黑启动功能。The power supply system of this embodiment is simple in structure and low in cost, and the black start function of the mobile power supply vehicle is added.
储能电池系统与单向变流器PIS组成了储能电池组不间断供电系统，交流母线、储能电池组共同组成应急负载供电系统。其中储能电池组供电系统接入静态开关的输入端，同时交流母线经旁路检修开关K6接入静态开关的输入端，静态开关输出端再接入负载开关K3、开关K5，共同组成负载不间断供电系统。The energy storage battery system and the one-way converter PIS constitute the uninterrupted power supply system of the energy storage battery group, and the AC bus and the energy storage battery group together constitute the emergency load power supply system. The power supply system of the energy storage battery pack is connected to the input terminal of the static switch, and the AC bus is connected to the input terminal of the static switch through the bypass maintenance switch K6, and the output terminal of the static switch is connected to the load switch K3 and switch K5. Intermittent power supply system.
交流母线为车内所有负载供电，交流母线接入开关K4，同时储能电池组供电系统通过手动开关K5接入开关K4，这样当交流母线发生故障时，能够通过手动开关K5将储能电池组供电系统接入车内负载，保证车内负载不间断供电。The AC bus powers all the loads in the car, the AC bus is connected to switch K4, and the power supply system of the energy storage battery pack is connected to switch K4 through manual switch K5, so that when the AC bus fails, the energy storage battery pack can be switched by manual switch K5. The power supply system is connected to the in-vehicle load to ensure uninterrupted power supply to the in-vehicle load.
380V市电、380V柴油机发电分别接入自动转换开关ATS两个输入端，共同组成双供电电源系统，其中380V市电为常用电源，380V柴油机发电为备用电源，可以使两路电源自动切换，输出端接交流母线。The 380V mains power and the 380V diesel engine power generation are respectively connected to the two input ends of the automatic transfer switch ATS to form a dual power supply system, in which the 380V mains power supply is the common power supply, and the 380V diesel engine power generation is the backup power supply. Terminate the AC bus.
储能电池供电系统主要有交流母线、双向变流器PCS、直流母线、单向变流器PIS、储能电池组共同构成，其中交流母线输出端接入双向变流器PCS交流侧，双向变流器PCS直流侧分两路，一路通过开关K2接入单向变流器直流侧，一路接入储能电池组输入端，同时储能电池组输出端接入单向变流器直流侧，单向变流器交流侧接入静态开关的输入一端，同时交流母线输出端接入旁路检修开关K6一端，K6另一端接入静态开关的输入端另一端，静态开关的输出端接入开关K3的一端，另一端接入应急负载。The energy storage battery power supply system is mainly composed of AC bus, bidirectional converter PCS, DC bus, unidirectional converter PIS, and energy storage battery pack. The output end of the AC bus is connected to the AC side of the bidirectional converter PCS, and the bidirectional converter The PCS DC side of the converter is divided into two circuits, one is connected to the DC side of the one-way converter through the switch K2, the other is connected to the input end of the energy storage battery pack, and the output end of the energy storage battery pack is connected to the DC side of the one-way converter. The AC side of the one-way converter is connected to the input end of the static switch, and the output end of the AC bus is connected to one end of the bypass inspection switch K6, the other end of K6 is connected to the other end of the input end of the static switch, and the output end of the static switch is connected to the switch One end of K3 and the other end are connected to the emergency load.
还包括能量管理系统，所述的能量管理系统分别与开关自动转化开关ATS、双向变流器PCS、单向变流器PIS通过CAN总线通信连接，所述储能系统与监控终端通过CAN连接。It also includes an energy management system, the energy management system is respectively connected with the automatic switching switch ATS, the bidirectional converter PCS, and the unidirectional converter PIS through CAN bus communication, and the energy storage system is connected with the monitoring terminal through CAN.
一种智能型储能电源车不间断供电系统装置的控制方法，包括市电供电模式、电池独立供电模式、相关设备维修状态供电模式、储能电池系统维护模式，其中：市电供电模式如图2所示，电池独立供电模式如图3所示，相关设备维修状态供电模式如图4所示，储能电池维护模式如图5所示。A control method for an uninterruptible power supply system device of an intelligent energy storage power supply vehicle, including a mains power supply mode, a battery independent power supply mode, a related equipment maintenance state power supply mode, and an energy storage battery system maintenance mode, wherein: the mains power supply mode is as shown in the figure 2, the battery independent power supply mode is shown in Figure 3, the power supply mode in the maintenance state of related equipment is shown in Figure 4, and the energy storage battery maintenance mode is shown in Figure 5.
针对图2市电供电模式相应的控制策略流程图如图6所示，详细步骤如下：The control strategy flow chart corresponding to the mains power supply mode in Figure 2 is shown in Figure 6, and the detailed steps are as follows:
(1)基于磷酸铁锂储能电池系统的不间断应急供电系统在对应急负载供电时，移动储能车首先连接上市电后，当自动转换开关ATS检测到市电正常时，闭合自动转换开关ATS市电侧以及交流母线输入侧开关K1，提供电源给交流母线；(1) When the uninterrupted emergency power supply system based on the lithium iron phosphate energy storage battery system supplies power to the emergency load, the mobile energy storage vehicle is first connected to the mains, and when the automatic transfer switch ATS detects that the mains is normal, the automatic transfer switch is closed. ATS mains side and AC bus input side switch K1 provides power to AC bus;
(2)能量管理系统EMS通过CAN总线首先启动双向变流器PCS，设定其输出功率为0，再启动单向变流器PIS，同时读取PCS、PIS的输出功率；(2) The energy management system EMS first starts the bidirectional converter PCS through the CAN bus, sets its output power to 0, then starts the unidirectional converter PIS, and reads the output power of the PCS and PIS at the same time;
(3)当单向变流器PIS输出功率小于设定输出功率且储能电池组荷电量SOC小于设定值时，能量管理系统EMS控制双向变流器PCS通过直流母线对电池进行充电，以保证储能电池不间断供电系统稳定工作；(3) When the output power of the one-way converter PIS is less than the set output power and the SOC of the energy storage battery pack is less than the set value, the energy management system EMS controls the two-way converter PCS to charge the battery through the DC bus, so as to Ensure the stable operation of the uninterrupted power supply system of the energy storage battery;
(4)在应急供电过程中，若应急负载负荷突然增加，则闭合开关K2，双向变流器PCS同时供給单向变流器PIS部分功率，以满足负载需要；(4) During the emergency power supply process, if the emergency load load suddenly increases, the switch K2 is closed, and the bidirectional converter PCS supplies part of the power of the unidirectional converter PIS to meet the load needs;
(5)当储能电池组荷电量SOC大于设定值时，应急负载输出功率主要由储能电池组提供，同时双向变流器PCS实时跟踪单向变流器输出功率。(5) When the SOC of the energy storage battery pack is greater than the set value, the emergency load output power is mainly provided by the energy storage battery pack, and the bidirectional converter PCS tracks the output power of the unidirectional converter in real time.
针对图3电池独立供电模式相应的控制策略流程图如图7所示，详细步骤如下：The control strategy flow chart corresponding to the battery independent power supply mode in Figure 3 is shown in Figure 7, and the detailed steps are as follows:
(1)在市电掉电后，应急负载供电均转移到由储能电池组经单向变流器PIS逆变输出，同时闭合开关K6，车载供电也将由储能电池组供给，在市电掉电前后储能电池组不间断供电系统未发生任何突变，因此可以无缝接替市电供給负载；(1) After the mains power failure, the emergency load power supply is transferred to the inverter output from the energy storage battery pack through the one-way converter PIS, and the switch K6 is closed at the same time, and the vehicle power supply will also be supplied by the energy storage battery pack. There is no sudden change in the uninterrupted power supply system of the energy storage battery pack before and after the power failure, so it can seamlessly take over the mains supply load;
(2)在进入电池独立运行模式后，当单向变流器PIS输出功率大于其最大输出功率时，PIS发出报警并停止运行，同时闭合旁路检修开关K7，且控制自动转换开关ATS2将输入侧转换到旁路开关支路上，由柴油机发电为整体负载供电；(2) After entering the battery independent operation mode, when the output power of the one-way converter PIS is greater than its maximum output power, the PIS will issue an alarm and stop running, and at the same time close the bypass inspection switch K7, and control the automatic transfer switch ATS2 to input the input The side is transferred to the bypass switch branch, and the diesel engine generates power for the overall load;
(3)当电池独立供电过程中，能量管理系统同时检测备用电源侧电压及频率是否正常，若正常自动转换开关ATS1输入侧投入柴油发电机，若不正常，则双向变流器PCS推出运行，继续运行在电池独立工作模式；(3) During the independent power supply process of the battery, the energy management system simultaneously detects whether the voltage and frequency of the standby power supply side are normal. If the input side of the automatic transfer switch ATS1 is normally put into the diesel generator, if it is not normal, the bidirectional converter PCS will be put into operation. Continue to run in battery independent working mode;
(4)若柴油机发电投入运行，同时启动双向变流器PCS，能量管理系统EMS同时读取PCS、PIS输出功率，若储能电池组荷电量SOC大于设定值时，PCS输出功率实时跟踪PIS输出功率，当储能电池组荷电量SOC小于设定值时，PCS以设定功率对电池组进行充电；(4) If the diesel engine power generation is put into operation, and the bidirectional converter PCS is started at the same time, the energy management system EMS reads the output power of PCS and PIS at the same time. If the SOC of the energy storage battery pack is greater than the set value, the output power of the PCS tracks the PIS in real time. Output power, when the SOC of the energy storage battery pack is less than the set value, the PCS charges the battery pack with the set power;
(5)同时双向变流器将实时跟踪市电状态，当市电恢复后，将发电机输入电源通过自动转换开关ATS1切换回市电工作，同时通过能量管理系统EMS停止柴油发电机工作，由于储能电池组始终处于无缝输出状态的挂网运行，确保了零切换时间。(5) At the same time, the bidirectional converter will track the state of the mains in real time. When the mains is restored, the generator input power will be switched back to the mains through the automatic transfer switch ATS1, and the diesel generator will be stopped through the energy management system EMS. The energy storage battery pack is always connected to the grid in a seamless output state, ensuring zero switching time.
针对图4电池维护模式相应的控制策略流程图如图8所示，详细步骤如下：The control strategy flow chart corresponding to the battery maintenance mode in Figure 4 is shown in Figure 8, and the detailed steps are as follows:
(1)考虑到储能电池组长时间静止状态，为防止电池组发生过放情况，需要定期对电池组进行充放电；(1) Considering the long-term static state of the energy storage battery pack, in order to prevent the over-discharge of the battery pack, it is necessary to regularly charge and discharge the battery pack;
(2)启动柴油发电机，自动转换开关ATS1自动切换到发电机侧，闭合开关K1，接入双向变流器PCS交流侧，通过PCS对储能电池组进行充电；(2) Start the diesel generator, the automatic transfer switch ATS1 automatically switches to the generator side, close the switch K1, connect to the AC side of the bidirectional converter PCS, and charge the energy storage battery pack through the PCS;
(3)同时闭合开关K5，储能电池组通过PIS对车内负载进行放电。(3) At the same time, the switch K5 is closed, and the energy storage battery pack discharges the load in the vehicle through the PIS.
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| CN114268166A (en) * | 2021-11-24 | 2022-04-01 | 国网浙江省电力有限公司诸暨市供电公司 | Mobile high-reliability power-off zero-perception uninterrupted switching system |
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