CN116436278A - A kind of AC-DC multiplexing power converter and its control method - Google Patents

A kind of AC-DC multiplexing power converter and its control method Download PDF

Info

Publication number
CN116436278A
CN116436278A CN202310276038.0A CN202310276038A CN116436278A CN 116436278 A CN116436278 A CN 116436278A CN 202310276038 A CN202310276038 A CN 202310276038A CN 116436278 A CN116436278 A CN 116436278A
Authority
CN
China
Prior art keywords
port
switch
module
power supply
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310276038.0A
Other languages
Chinese (zh)
Inventor
桑子夏
雷何
方仍存
杨东俊
汪颖翔
颜炯
黄家祺
郑旭
王琪鑫
蔡杰
杨洁
徐秋实
余轶
侯婷婷
王思聪
刘君瑶
叶学程
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Economic and Technological Research Institute of State Grid Hubei Electric Power Co Ltd
Original Assignee
Economic and Technological Research Institute of State Grid Hubei Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Economic and Technological Research Institute of State Grid Hubei Electric Power Co Ltd filed Critical Economic and Technological Research Institute of State Grid Hubei Electric Power Co Ltd
Priority to CN202310276038.0A priority Critical patent/CN116436278A/en
Publication of CN116436278A publication Critical patent/CN116436278A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/36Means for starting or stopping converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/0003Details of control, feedback or regulation circuits
    • H02M1/0006Arrangements for supplying an adequate voltage to the control circuit of converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/0003Details of control, feedback or regulation circuits
    • H02M1/0041Control circuits in which a clock signal is selectively enabled or disabled
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/38Means for preventing simultaneous conduction of switches
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The technical scheme adopted by the invention is as follows: an AC/DC multiplexing power converter and a control method thereof are provided: the device comprises a switch module, a plurality of ports, a direct current bus capacitor and a control analysis module; each path of port is provided with a switch; one end of the switch module is connected with the direct current bus capacitor, and the other end of the switch module is connected with a switch of each path of port; one end of the port is connected with a power supply or a load, and the other end of the port is connected with a switch of the port; when the switch configured by any one path of port is closed, the other paths of switches are opened; one side of the direct current bus capacitor is grounded, and the other side of the direct current bus capacitor is connected with the switch module to exchange energy; the control analysis module is connected with the switch of each port and the switch module through control lines, and generates driving signals of the switch module and the switch based on power supplies or loads connected with each port. The invention can output electric energy in different forms in time sequence.

Description

一种交直流复用的功率变换器及其控制方法A kind of AC-DC multiplexing power converter and its control method

技术领域technical field

本发明属于电气技术领域,具体涉及一种交直流复用的功率变换器及其控制方法。The invention belongs to the field of electrical technology, and in particular relates to an AC-DC multiplexing power converter and a control method thereof.

背景技术Background technique

能源互联网可理解是综合运用先进的电力电子技术,信息技术和智能管理技术,将大量由分布式能量采集装置,分布式能量储存装置和各种类型负载构成的新型电力网络节点互联起来,以实现能量双向流动的能量对等交换与共享网络。Energy Internet can be understood as the comprehensive use of advanced power electronics technology, information technology and intelligent management technology to interconnect a large number of new power network nodes composed of distributed energy collection devices, distributed energy storage devices and various types of loads to achieve An energy peer-to-peer exchange and sharing network with two-way energy flow.

各种类型的能源设备接入能源互联网时需要进行能量转换。传统的控制器在处理各个类型的能源设备的接入时,针对不同类型的能源设备需要通过复杂的交直流模拟转换设备或变压器实现能源的有效转换,并且每种转换都需要不同的设备,比如直流-直流的转换,直流-交流的转换,其中交流的电压、频率、相位可能各不相同。为满足不同用电设备的需求,转换系统所配有的电源数量和种类都比较多,导致装置体积大、供电方案复杂,并且增加了系统损耗,也不利于整个系统的稳定运行。When various types of energy devices are connected to the Energy Internet, energy conversion is required. When traditional controllers deal with the access of various types of energy equipment, complex AC-DC analog conversion equipment or transformers are required to achieve effective energy conversion for different types of energy equipment, and each conversion requires different equipment, such as DC-DC conversion, DC-AC conversion, where the AC voltage, frequency, and phase may vary. In order to meet the needs of different electrical equipment, the conversion system is equipped with a large number and types of power sources, resulting in large devices, complex power supply schemes, increased system losses, and is not conducive to the stable operation of the entire system.

发明内容Contents of the invention

本发明的目的就是为了解决上述背景技术存在的不足,提供一种交直流复用的功率变换器及其控制方法,能够分时序输出不同形式电能。The object of the present invention is to solve the shortcomings of the above-mentioned background technology, and provide an AC-DC multiplexing power converter and its control method, which can output different forms of electric energy in time sequence.

本发明采用的技术方案是:一种交直流复用的功率变换器:包括一个开关模块、若干个端口、直流母线电容和控制分析模块;各路端口配置有开关;所述开关模块一端连接直流母线电容,另一端连接每一路端口的开关;所述端口一端连接电源或者负载,另一端连接该路端口的开关;当任一路端口配置的开关闭合时,其他路开关断开;所述直流母线电容一侧接地,另一侧连接开关模块进行能量交换;所述控制分析模块通过控制线连接各个端口的开关和开关模块,并基于各个端口所连接的电源或者负载生成开关模块和开关的驱动信号;所述开关模块的驱动信号按照端口数量划分成多时序开关周期,每个时序开关周期分别对应一个的端口;控制分析模块在任一个端口对应的时序开关周期,驱动该端口对应的开关闭合,同时驱动开关模块向该端口输出对应电压和频率的电能或者接收该端口输出的电能;所述直流母线电容应用于能源系统中;能源系统通过直流母线电容和开关模块为各端口所连接的负载供电或者通过开关模块和直流母线电容接收各端口所连接的电源输出的电能。The technical solution adopted in the present invention is: an AC-DC multiplexing power converter: including a switch module, several ports, DC bus capacitors and a control analysis module; each port is equipped with a switch; one end of the switch module is connected to the DC The other end of the bus capacitor is connected to the switch of each port; one end of the port is connected to the power supply or load, and the other end is connected to the switch of the port; when the switch configured for any port is closed, the other switches are disconnected; the DC bus One side of the capacitor is grounded, and the other side is connected to the switch module for energy exchange; the control analysis module is connected to the switch and the switch module of each port through the control line, and generates the drive signal of the switch module and the switch based on the power supply or load connected to each port The driving signal of the switch module is divided into multiple sequential switching cycles according to the number of ports, and each sequential switching cycle corresponds to a port respectively; the control analysis module drives the corresponding switch of the port to close at the corresponding sequential switching cycle of any port, and at the same time The drive switch module outputs electric energy corresponding to the voltage and frequency to the port or receives the electric energy output by the port; the DC bus capacitor is used in the energy system; the energy system supplies power to the load connected to each port through the DC bus capacitor and the switch module or The electric energy output by the power supply connected to each port is received through the switch module and the DC bus capacitor.

上述技术方案中,所述控制分析模块根据每个端口所连接的负载或者电源的电压、电流和频率,计算每个端口所连接的负载或者电源得到每个端口相应的电压幅值、频率、输出功率大小,并确定每个端口所连接的负载正常工作所需的供电周期以及时序,从而确定开关模块和开关的驱动信号的控制参数。In the above technical solution, the control analysis module calculates the load or power supply connected to each port according to the voltage, current and frequency of the load or power supply connected to each port to obtain the corresponding voltage amplitude, frequency and output of each port. The power level, and determine the power supply cycle and timing required for the normal operation of the load connected to each port, so as to determine the control parameters of the switch module and the drive signal of the switch.

上述技术方案中,包括以下步骤:能源系统开启后,控制分析模块根据n个端口所连接的负载或者电源的电能特性,按照端口数量对开关模块的开关周期进行排序和划分,并确定每个开关周期相应的死区时间:第i个开关周期内第i个端口的开关闭合,其余所有端口的开关断开,控制分析模块驱动开关模块工作,如果第i个端口连接的为负载则基于该负载的电能特性将直流母线电容中的电能经由开关模块输出到第i个端口,如果第i个端口连接的为电源则基于该电源的电能特性将该电源输出的电能经由开关模块输出到直流母线电容;第i个开关周期结束时,第i个端口的开关断开;在死区时间内,控制分析模块断开所有端口的开关,并控制开关模块停止工作;经过死区时间后,第i+1个开关周期开始,并重复上述流程;完成第n个开关周期对第n个端口的输入后,将回到第1个开关周期,重新为第一个端口的负载供电或者接收该端口所接电源输出的电能。The above technical solution includes the following steps: after the energy system is turned on, the control analysis module sorts and divides the switching periods of the switch modules according to the number of ports according to the power characteristics of the loads connected to the n ports or the power supply, and determines that each switch The dead time corresponding to the cycle: the switch of the i-th port in the i-th switching cycle is closed, and the switches of all other ports are disconnected. The control analysis module drives the switch module to work. If the i-th port is connected to a load, it is based on the load According to the power characteristics of the power supply, the power in the DC bus capacitor is output to the i-th port via the switch module. If the i-th port is connected to a power supply, the power output by the power supply is output to the DC bus capacitor through the switch module based on the power characteristics of the power supply. ; At the end of the i-th switching cycle, the switch of the i-th port is turned off; during the dead time, the control analysis module turns off the switches of all ports, and controls the switch module to stop working; after the dead time, the i+ 1 switching cycle starts, and repeats the above process; after completing the input of the nth port in the nth switching cycle, it will return to the first switching cycle to re-supply power to the load of the first port or receive the load connected to the port. The electrical energy output by the power supply.

上述技术方案中,控制分析模块基于各个端口所连接的电源或者负载生成开关模块和开关的驱动信号的过程包括:控制模块获取每个端口的所连接负载的输入电压或者所连接电源的输出电压,并基于直流母线电容电压计算得到每个端口的占空比;基于下式确定每个端口的开关周期Ti,i=1,2,...,n;In the above technical solution, the process of the control analysis module generating the driving signal of the switch module and the switch based on the power supply or load connected to each port includes: the control module obtains the input voltage of the connected load or the output voltage of the connected power supply of each port, And calculate the duty cycle of each port based on the DC bus capacitor voltage; determine the switching cycle T i of each port based on the following formula, i=1,2,...,n;

Vi=Di*VDC (1)V i =D i *V DC (1)

Figure SMS_1
Figure SMS_1

Di<Ti (3)D i < T i (3)

其中,VDC表示直流母线电容电压;Vi表示第i个端口的所连接负载的输入电压或者所连接电源的输出电压;Di表示第i个端口的所连接负载的输入电压或者所连接电源的占空比;Ti第i个端口的所连接负载的输入电压或者所连接电源的工作周期;f和T分别表示开关模块的工作频率和周期Among them, V DC represents the DC bus capacitor voltage; V i represents the input voltage of the connected load at the i-th port or the output voltage of the connected power supply; D i represents the input voltage of the connected load at the i-th port or the connected power supply The duty cycle of T i ; the input voltage of the connected load of the i-th port or the duty cycle of the connected power supply; f and T represent the operating frequency and cycle of the switch module, respectively

本发明的有益效果是:本发明可以通过复用同一控制模块,同时满足不同类型、不同种类的生产设备高效运行,从此不再拘泥于必须不同电制电能独立供电。通过不同的输入输出端口均连接开关模块,由直线母线电容实现充放电,从而减少了所配有的电源数量和种类,进一步压缩了装置体积,简化了供电方案,有利于整个系统的稳定运行。同时通过数字化控制实现灵活有效的交直流复用功能,可以大大提高能源转换效率,提高能量路由器乃至能源互联网的整体性能。The beneficial effects of the present invention are: the present invention can meet the efficient operation of different types and different types of production equipment by multiplexing the same control module, and no longer stick to the independent power supply of different electrical systems. Different input and output ports are connected to the switch module, and the charging and discharging are realized by the linear bus capacitor, thereby reducing the number and types of power supplies, further reducing the volume of the device, simplifying the power supply scheme, and facilitating the stable operation of the entire system. At the same time, the flexible and effective AC-DC multiplexing function can be realized through digital control, which can greatly improve the energy conversion efficiency and improve the overall performance of the energy router and even the energy Internet.

进一步的,本发明的控制分析模块基于每个端口所连接的负载和电源确定时序周期,保证了多个端口所连接的设备均能够同时正常进行使用,提高了能源系统的整体利用率。Furthermore, the control analysis module of the present invention determines the timing cycle based on the load and power supply connected to each port, which ensures that the devices connected to multiple ports can be used normally at the same time, and improves the overall utilization of the energy system.

进一步的,本发明开关模块的驱动信号按照端口数量划分成多时序开关周期,并设置每个端口对应的时序和死区时间,保证能源系统的整体安全性和稳定性。Further, the driving signal of the switching module of the present invention is divided into multi-sequence switching cycles according to the number of ports, and the corresponding timing and dead time of each port are set to ensure the overall safety and stability of the energy system.

进一步的,本发明的控制分析模块基于每个端口的电能特性合理计算每个端口的时序和开关周期,保证每个端口所连接的设备都可以正常使用。Further, the control analysis module of the present invention reasonably calculates the timing and switching cycle of each port based on the power characteristics of each port, so as to ensure that the equipment connected to each port can be used normally.

附图说明Description of drawings

图1为本申请实施例所提供的交直流复用的分时序输出不同形式电能的功率变换器结构图。FIG. 1 is a structural diagram of an AC/DC multiplexed power converter outputting different forms of electric energy in time-sequence provided by an embodiment of the present application.

图2为本申请实施例所提供的交直流复用的分时序输出不同形式电能的功率变换器的控制信号图a。Fig. 2 is a control signal diagram a of an AC-DC multiplexed power converter outputting different forms of electric energy in time-sequence provided by the embodiment of the present application.

图3为本申请实施例所提供的交直流复用的分时序输出不同形式电能的功率变换器的控制信号图b。Fig. 3 is a control signal diagram b of an AC/DC multiplexed power converter outputting different forms of electric energy in time-sequence provided by the embodiment of the present application.

图4本申请实施例所提供的交直流复用的分时序输出不同形式电能的功率变换器的工作流程图。Fig. 4 is a working flow chart of the AC-DC multiplexing power converter outputting different forms of electric energy in time-sequence provided by the embodiment of the present application.

具体实施方式Detailed ways

下面结合附图和具体实施例对本发明作进一步的详细说明,便于清楚地了解本发明,但它们不对本发明构成限定。The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

如图1所示,本发明提供了一种交直流复用的功率变换器:包括一个开关模块、若干个端口、直流母线电容和控制分析模块;各路端口配置有开关;所述开关模块一端连接直流母线电容,另一端连接每一路端口的开关;所述端口一端连接电源或者负载,另一端连接该路端口的开关;当任一路端口配置的开关闭合时,其他路开关断开;所述直流母线电容一侧接地,另一侧连接开关模块进行能量交换;所述控制分析模块通过控制线连接各个端口的开关和开关模块,并基于各个端口所连接的电源或者负载生成开关模块和开关的驱动信号;所述开关模块的驱动信号按照端口数量划分成多时序开关周期,每个时序开关周期分别对应一个的端口;控制分析模块在任一个端口对应的时序开关周期,驱动该端口对应的开关闭合,同时驱动开关模块向该端口输出对应电压和频率的电能或者接收该端口输出的电能;所述直流母线电容应用于能源系统中;能源系统通过直流母线电容和开关模块为各端口所连接的负载供电或者通过开关模块和直流母线电容接收各端口所连接的电源输出的电能。As shown in Figure 1, the present invention provides an AC-DC multiplexing power converter: it includes a switch module, several ports, DC bus capacitors and a control analysis module; each port is equipped with a switch; one end of the switch module Connect the DC bus capacitor, and the other end is connected to the switch of each port; one end of the port is connected to the power supply or load, and the other end is connected to the switch of the port; when the switch configured for any port is closed, the other switches are disconnected; One side of the DC bus capacitor is grounded, and the other side is connected to the switch module for energy exchange; the control analysis module is connected to the switch and the switch module of each port through the control line, and generates the power of the switch module and the switch based on the power supply or load connected to each port. Drive signal; the drive signal of the switch module is divided into multiple time sequence switch cycles according to the number of ports, and each time sequence switch cycle corresponds to one port respectively; the control analysis module drives the switch corresponding to the port to close in the time sequence switch cycle corresponding to any port , while driving the switch module to output the electric energy corresponding to the voltage and frequency to the port or receive the electric energy output by the port; the DC bus capacitor is used in the energy system; the energy system provides the load connected to each port through the DC bus capacitor and the switch module Power supply or receive the electric energy output by the power supply connected to each port through the switch module and the DC bus capacitor.

上述技术方案中,所述控制分析模块根据每个端口所连接的负载或者电源的电压、电流和频率,计算每个端口所连接的负载或者电源得到每个端口相应的电压幅值、频率、输出功率大小,并确定每个端口所连接的负载正常工作所需的供电周期以及时序,从而确定开关模块和开关的驱动信号的控制参数。In the above technical solution, the control analysis module calculates the load or power supply connected to each port according to the voltage, current and frequency of the load or power supply connected to each port to obtain the corresponding voltage amplitude, frequency and output of each port. The power level, and determine the power supply cycle and timing required for the normal operation of the load connected to each port, so as to determine the control parameters of the switch module and the drive signal of the switch.

上述技术方案中,包括以下步骤:能源系统开启后,控制分析模块根据n个端口所连接的负载或者电源的电能特性,按照端口数量对开关模块的开关周期进行排序和划分,并确定每个开关周期相应的死区时间:第i个开关周期内第i个端口的开关闭合,其余所有端口的开关断开,控制分析模块驱动开关模块工作,如果第i个端口连接的为负载则基于该负载的电能特性将直流母线电容中的电能经由开关模块输出到第i个端口,如果第i个端口连接的为电源则基于该电源的电能特性将该电源输出的电能经由开关模块输出到直流母线电容;第i个开关周期结束时,第i个端口的开关断开;在死区时间内,控制分析模块断开所有端口的开关,并控制开关模块停止工作;经过死区时间后,第i+1个开关周期开始,并重复上述流程;完成第n个开关周期对第n个端口的输入后,将回到第1个开关周期,重新为第一个端口的负载供电或者接收该端口所接电源输出的电能。The above technical solution includes the following steps: after the energy system is turned on, the control analysis module sorts and divides the switching periods of the switch modules according to the number of ports according to the power characteristics of the loads connected to the n ports or the power supply, and determines that each switch The dead time corresponding to the cycle: the switch of the i-th port in the i-th switching cycle is closed, and the switches of all other ports are disconnected. The control analysis module drives the switch module to work. If the i-th port is connected to a load, it is based on the load According to the power characteristics of the power supply, the power in the DC bus capacitor is output to the i-th port via the switch module. If the i-th port is connected to a power supply, the power output by the power supply is output to the DC bus capacitor through the switch module based on the power characteristics of the power supply. ; At the end of the i-th switching cycle, the switch of the i-th port is turned off; during the dead time, the control analysis module turns off the switches of all ports, and controls the switch module to stop working; after the dead time, the i+ 1 switching cycle starts, and repeats the above process; after completing the input of the nth port in the nth switching cycle, it will return to the first switching cycle to re-supply power to the load of the first port or receive the load connected to the port. The electrical energy output by the power supply.

所述直流母线电容,原理上可采用普通电容,根据实际情况也可选择储电量更大、充放电速度更快、循环寿命更长的超级电容。In principle, the DC bus capacitor can be an ordinary capacitor, or a super capacitor with a larger storage capacity, a faster charge and discharge speed, and a longer cycle life can also be selected according to the actual situation.

脉冲宽度调制基于面积等效原理,即冲量相等而形状不同的窄脉冲加在具有惯性的环节上时,其效果基本相同,由此证明了基于PWM进行交直流转换的可行性。Pulse Width Modulation is based on the area equivalent principle, that is, when narrow pulses with equal impulse but different shapes are added to the link with inertia, the effect is basically the same, thus proving the feasibility of AC-DC conversion based on PWM.

基于PWM原理,所述交直流复用端口设备通过对端口中开关器件(IGBT、MOSFET等)模块的充放电时序控制,可以以数字化的方式同时实现传统电路的斩波、整流和逆变等功能。Based on the principle of PWM, the AC/DC multiplexing port device can realize the functions of chopper, rectification and inverter of the traditional circuit simultaneously in a digital way by controlling the charging and discharging sequence of the switching device (IGBT, MOSFET, etc.) module in the port .

本发明提供一种交直流复用的分时序输出不同形式电能的功率变换器。所述在需要多种形式电能的情况下,通过控制分析模块控制开关模块,将其开关驱动信号按照输出端口数量划分成多时序开关周期,每个时序开关周期对应单独端口,以此达到以同一个开关模块输出多路不同电压、频率的电能。既可同时为各端口提供不同电制的电能,又减少了系统原需配有的电源数量和种类,压缩了装置体积,简化了供电方案,提高了系统稳定性,也降低了多个电源带来的不必要的系统损耗,提高了能源转换效率,提高了能量路由器乃至能源互联网的整体性能。The invention provides an AC-DC multiplexing power converter that outputs different forms of electric energy in time-sequence. In the case where multiple forms of electric energy are required, the switch module is controlled by the control analysis module, and its switch drive signal is divided into multiple sequential switching cycles according to the number of output ports, and each sequential switching cycle corresponds to a separate port, so as to achieve the same A switch module outputs multiple channels of electric energy with different voltages and frequencies. It can not only provide power of different power systems for each port at the same time, but also reduce the number and types of power supplies originally required by the system, reduce the size of the device, simplify the power supply scheme, improve system stability, and reduce multiple power supply belts. Unnecessary system loss from the system improves the energy conversion efficiency and improves the overall performance of the energy router and even the energy Internet.

本发明涉及的n个端口的输出电压与母线直流电压由其占空比确定:The output voltage of the n ports involved in the present invention and the bus DC voltage are determined by their duty ratios:

Vi=Di*VDC (1)V i =D i *V DC (1)

而占空比则和开关模块的工作频率f相关,每个端口的开关周期则比其占空比略大,以保证相邻的开关周期存在死区时间,因此不会相互影响。The duty cycle is related to the operating frequency f of the switch module, and the switching cycle of each port is slightly larger than its duty cycle to ensure that adjacent switching cycles have dead time, so they will not affect each other.

Figure SMS_2
Figure SMS_2

Di<Ti (3)D i < T i (3)

其中,VDC表示直流母线电容电压;Vi表示第i个端口的所连接负载的输入电压或者所连接电源的输出电压;Di表示第i个端口的所连接负载的输入电压或者所连接电源的占空比;Ti第i个端口的所连接负载的输入电压或者所连接电源的工作周期;f和T分别表示开关模块的工作频率和周期。Among them, V DC represents the DC bus capacitor voltage; V i represents the input voltage of the connected load at the i-th port or the output voltage of the connected power supply; D i represents the input voltage of the connected load at the i-th port or the connected power supply The duty cycle of T i ; the input voltage of the connected load of the i-th port or the duty cycle of the connected power supply; f and T represent the operating frequency and cycle of the switch module, respectively.

在其中一个实施例中,一种交直流复用的分时序输出不同形式电能的功率变换器包括以下的部分技术特征或全部技术特征:In one of the embodiments, an AC-DC multiplexing power converter that outputs different forms of electric energy in time-sequence includes some or all of the following technical features:

在其中一个实施例中,一种交直流复用的同时供电端口设备,母线电压设为VDC=800VDC,由端口1输出直流电压V1=100VDC、端口2输出交流电压V2=220VAC、端口3输出交流电压V3=110VAC三个主要工作模式过程组成。In one of the embodiments, a kind of AC and DC multiplex power supply port equipment at the same time, the bus voltage is set to V DC =800VDC, the output DC voltage V 1 =100VDC from the port 1, the AC voltage V 2 =220VAC output from the port 2, the port 3 The output AC voltage V 3 =110VAC is composed of three main working modes.

由于交流电压最大值为有效值乘以

Figure SMS_3
Figure SMS_4
根据式(1),可计算出D1=0.125;D2=0.39;D3=0.2;之后设置T1=0.2;T2=0.5;T3=0.3。Since the maximum value of the AC voltage is the effective value multiplied by
Figure SMS_3
but
Figure SMS_4
According to formula (1), it can be calculated that D 1 =0.125; D 2 =0.39; D 3 =0.2; then set T 1 =0.2; T 2 =0.5; T 3 =0.3.

如图2和图3所示,每个工作模式分为数个操作。As shown in Figure 2 and Figure 3, each working mode is divided into several operations.

所述端口1输出直流电压模式中,在第1以及第n+1个开关周期内,端口1的开关闭合,端口2和端口3的开关断开,控制分析模块控制开关模块输出100VDC。In the port 1 output DC voltage mode, in the first and n+1 switching cycles, the switch of port 1 is closed, the switches of port 2 and port 3 are open, and the control analysis module controls the switch module to output 100VDC.

所述端口2输出交流电压模式中,在第2以及第n+2个开关周期内,端口2的开关闭合,端口1和端口3的开关断开,控制分析模块控制开关模块输出端口2所需峰值为311V的交流电压。In the port 2 output AC voltage mode, in the second and n+2 switching cycles, the switch of port 2 is closed, the switches of port 1 and port 3 are open, and the control analysis module controls the switch module to output port 2. AC voltage of 311V peak.

所述端口3输出交流电压模式中,在第3以及第n+3个开关周期内,端口3的开关闭合,端口1和端口2的开关断开,控制分析模块控制开关模块输出端口3所需峰值为155V的交流电压。In the port 3 output AC voltage mode, in the 3rd and n+3th switching cycles, the switch of port 3 is closed, the switches of port 1 and port 2 are open, and the control analysis module controls the switch module to output port 3. AC voltage of 155V peak.

在其中一个实施例中,交直流复用的同时供电端口设备,其所述结构包括:一个开关模块、数个输出端口、每个端口配置的端口开关,一个直流母线电容以及一个控制分析模块。In one of the embodiments, the structure of the simultaneous AC and DC multiplexed power supply port device includes: a switch module, several output ports, a port switch configured for each port, a DC bus capacitor and a control analysis module.

所述开关模块用于输出包括直流和交流在内的各个电压、各个频率的电能。所述每个端口配置的端口开关会在开关模块对其输出功率时闭合,所述直流母线电容一般作为电源,某些场景下也可使用超级电容或蓄电池。The switch module is used to output electric energy of various voltages and frequencies including direct current and alternating current. The port switch configured for each port will be closed when the switch module outputs power to it. The DC bus capacitor is generally used as a power source, and in some scenarios, a super capacitor or battery can also be used.

所述控制分析模块通过控制线连接各个端口开关和开关模块,接受系统所检测的电压、电流、频率、等数据并进一步得到功率、电流方向等数据,分析设备所处状态,进而控制开关模块根据分析结果进入对应工作模式,调整控制参数。The control analysis module connects each port switch and switch module through the control line, receives the data such as voltage, current, frequency, etc. detected by the system and further obtains data such as power, current direction, etc., analyzes the state of the equipment, and then controls the switch module according to the The analysis result enters the corresponding working mode and adjusts the control parameters.

所述控制分析模块通过控制线连接开关模块、直流母线电容、端口开关等器件,负责接收能源系统所检测的电压、电流、频率等数据并进一步得到功率、谐波状况等数据,分析开关模块所处状态,进而控制开关模块根据分析结果进入对应工作模式。该模块包括供电单元、通信线路、控制芯片、和外部交互端口。所述供电单元负责为模块供电;所述控制芯片,用于对系统所检测到的电压电流信号进行数据处理,存储数据和产生控制信号;所述通信线路作为信号传输的通道;所述外部交互端口,用于控制分析模块与外部进行信息交互。The control analysis module is connected to the switch module, DC bus capacitor, port switch and other devices through the control line, and is responsible for receiving data such as voltage, current and frequency detected by the energy system and further obtaining data such as power and harmonic conditions, and analyzing the data generated by the switch module. state, and then control the switch module to enter the corresponding working mode according to the analysis result. The module includes a power supply unit, a communication line, a control chip, and an external interactive port. The power supply unit is responsible for supplying power to the module; the control chip is used to process the voltage and current signals detected by the system, store data and generate control signals; the communication line serves as a channel for signal transmission; the external interaction The port is used to control the analysis module to exchange information with the outside world.

如图1结构所示,一种交直流复用的分时序输出不同形式电能的功率变换器,按照以下步骤运行:As shown in the structure of Figure 1, an AC-DC multiplexed power converter that outputs different forms of electric energy in time-sequence operates according to the following steps:

如图4所示,能源系统开启后,控制分析模块根据三个端口所需的电压、频率等不同电能特性,对开关周期进行划分,并将开关周期按照端口数量分为3部分。之后,在开关周期1内,控制分析模块控制端口1开关闭合,并输出端口1所需直流电压。而后,在死区时间内,控制分析模块断开所有端口开关,开关模块停止工作。之后,控制分析模块在开关周期2内控制端口2开关闭合,并输出端口2所需交流电压,并在随后的死区时间内,断开所有端口开关,开关模块停止工作。随后,控制分析模块在开关周期3内控制端口3开关闭合,并输出端口3所需交流电压,并在随后的死区时间内,断开所有端口开关,开关模块停止工作。死区时间结束后,重复开关周期1中的工作流程。As shown in Figure 4, after the energy system is turned on, the control analysis module divides the switching cycle according to the different power characteristics such as voltage and frequency required by the three ports, and divides the switching cycle into three parts according to the number of ports. Afterwards, in the switching cycle 1, the control analysis module controls the port 1 switch to close, and outputs the required DC voltage of the port 1. Then, within the dead time, the control analysis module turns off all port switches, and the switch module stops working. Afterwards, the control analysis module controls the port 2 switch to close in the switching period 2, and outputs the AC voltage required by the port 2, and turns off all port switches in the subsequent dead time, and the switch module stops working. Subsequently, the control analysis module controls the port 3 switch to close in the switching cycle 3, and outputs the AC voltage required by the port 3, and turns off all port switches in the subsequent dead time, and the switch module stops working. After the dead time has elapsed, the workflow in switching cycle 1 is repeated.

若按常规电源配置,则需要800VDC-100VDC(端口1)变流器1套、800VDC-220VAC(端口2)逆变器1套、800VDC-110VAC(端口3)逆变器1套,若每套逆变器和变流器均采用每套4个开关元件的全桥电路,则共需3*4=12个开关元件,且每套逆变器和变流器都需配备对应的控制芯片与驱动电路。If configured according to the conventional power supply, one set of 800VDC-100VDC (port 1) converter, one set of 800VDC-220VAC (port 2) inverter, and one set of 800VDC-110VAC (port 3) inverter are required. Both the inverter and the converter use a full-bridge circuit with 4 switching elements each, so a total of 3*4=12 switching elements are required, and each set of inverter and converter needs to be equipped with a corresponding control chip and Drive circuit.

而应用本实施例,则3个输出端口可有效复用同1套开关模块,同时完成800VDC-100VDC(端口1)、800VDC-220VAC(端口2)、800VDC-110VAC(端口3)的输出,仅需一套全桥电路也即4个开关元件,但须加上端口开关1、2、3共6个开关器件,共4+6=10个开关元件,有效节省2个开关元件及其配套的控制芯片与驱动电路。And apply this embodiment, then 3 output ports can effectively reuse the same set of switch modules, and complete the output of 800VDC-100VDC (port 1), 800VDC-220VAC (port 2), 800VDC-110VAC (port 3) at the same time, only A set of full-bridge circuit is required, that is, 4 switching elements, but a total of 6 switching elements must be added to port switches 1, 2, and 3, and a total of 4+6=10 switching elements, which effectively saves 2 switching elements and their supporting components. Control chip and drive circuit.

同理,若采用4端口输出,则可节省4*4-(4+2*4)=4个开关元件的成本。所以本发明较之现有技术除了可以有效提高能源转换效率的同时还能够进一步节约设备造价,从而提高能源系统的整体经济效益。Similarly, if 4-port output is adopted, the cost of 4*4-(4+2*4)=4 switching elements can be saved. Therefore, compared with the prior art, the present invention not only can effectively improve the energy conversion efficiency, but also can further save equipment cost, thereby improving the overall economic benefits of the energy system.

本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Claims (4)

1. An ac-dc multiplexed power converter, characterized by: the device comprises a switch module, a plurality of ports, a direct current bus capacitor and a control analysis module; each path of port is provided with a switch; one end of the switch module is connected with the direct current bus capacitor, and the other end of the switch module is connected with a switch of each path of port; one end of the port is connected with a power supply or a load, and the other end of the port is connected with a switch of the port; when the switch configured by any one path of port is closed, the other paths of switches are opened; one side of the direct current bus capacitor is grounded, and the other side of the direct current bus capacitor is connected with the switch module to exchange energy; the control analysis module is connected with the switch and the switch module of each port through control lines and generates driving signals of the switch module and the switch based on power supplies or loads connected with each port; the driving signals of the switch module are divided into a plurality of time sequence switch periods according to the number of ports, and each time sequence switch period corresponds to one port respectively; the control analysis module drives the switch corresponding to any port to be closed in a time sequence switching period corresponding to the port, and simultaneously drives the switch module to output electric energy with corresponding voltage and frequency to the port or receive electric energy output by the port; the direct current bus capacitor is applied to an energy system; the energy system supplies power to loads connected with the ports through the direct current bus capacitors and the switch modules or receives electric energy output by a power supply connected with the ports through the switch modules and the direct current bus capacitors.
2. An ac/dc multiplexed power converter as claimed in claim 1, wherein: the control analysis module calculates the load or the power supply connected with each port according to the voltage, the current and the frequency of the load or the power supply connected with each port to obtain the corresponding voltage amplitude, the frequency and the output power of each port, and determines the power supply period and the time sequence required by the normal operation of the load connected with each port, thereby determining the control parameters of the switch module and the driving signals of the switch.
3. The control method of the power converter based on the alternating current-direct current multiplexing as claimed in claim 1, wherein the control method comprises the following steps: the method comprises the following steps: after the energy system is started, the control analysis module orders and divides the switching period of the switching module according to the number of the n ports and the electric energy characteristics of the power supply, and determines the corresponding dead time of each switching period, wherein the switch of the ith port is closed in the ith switching period, the switches of all other ports are opened, the control analysis module drives the switching module to work, if the ith port is connected with the load, the electric energy in the direct current bus capacitor is output to the ith port through the switching module based on the electric energy characteristics of the load, and if the ith port is connected with the power supply, the electric energy output by the power supply is output to the direct current bus capacitor through the switching module based on the electric energy characteristics of the power supply; when the ith switching period is finished, the switch of the ith port is disconnected; in the dead time, controlling the analysis module to disconnect the switches of all ports and controlling the switch module to stop working; after the dead time, the (i+1) th switching period starts and the process is repeated; after the input of the nth switching period to the nth port is completed, the 1 st switching period is returned to, and the load of the first port is supplied with power again or the electric energy output by the power supply connected with the port is received.
4. A method according to claim 3, characterized in that: the process of the control analysis module generating the switch module and the driving signal of the switch based on the power source or the load connected to each port includes: the control module obtains the connection negative of each portThe load input voltage or the output voltage of a connected power supply, and the duty ratio of each port is calculated based on the DC bus capacitor voltage; determining the switching period T of each port based on i ,i=1,2,...,n;
V i =D i *V DC (1)
Figure QLYQS_1
D i <T i (3)
Wherein V is DC Representing the voltage of a direct current bus capacitor; v (V) i Representing the input voltage of the connected load of the i-th port or the output voltage of the connected power supply; d (D) i Representing the input voltage of the connected load of the i-th port or the duty cycle of the connected power supply; t (T) i The input voltage of the connected load of the i-th port or the duty cycle of the connected power supply; f and T represent the operating frequency and period of the switching module, respectively.
CN202310276038.0A 2023-03-21 2023-03-21 A kind of AC-DC multiplexing power converter and its control method Pending CN116436278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310276038.0A CN116436278A (en) 2023-03-21 2023-03-21 A kind of AC-DC multiplexing power converter and its control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310276038.0A CN116436278A (en) 2023-03-21 2023-03-21 A kind of AC-DC multiplexing power converter and its control method

Publications (1)

Publication Number Publication Date
CN116436278A true CN116436278A (en) 2023-07-14

Family

ID=87088187

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310276038.0A Pending CN116436278A (en) 2023-03-21 2023-03-21 A kind of AC-DC multiplexing power converter and its control method

Country Status (1)

Country Link
CN (1) CN116436278A (en)

Similar Documents

Publication Publication Date Title
Seo et al. A 95%-efficient 48V-to-1V/10A VRM hybrid converter using interleaved dual inductors
CN114050330B (en) Battery system and power supply system
CN103650312B (en) Power-supply system
CN113328622B (en) Control method of flying capacitor type three-level direct current buck converter
US20210126471A1 (en) System and method for managing charge control of a battery array
CN109149922B (en) Power factor correction circuit and alternating current charger for electric automobile using same
CN103907279A (en) power conversion system
CN110912245B (en) Three-port integrated photovoltaic energy storage converter
CN110336459A (en) A Novel Three-port Boost Integrated Converter and Control Method for Photovoltaic Energy Storage System
CN111049381B (en) A multi-objective cooperative optimization control method applied to DC three-level converter
CN110212842A (en) A kind of three port integrated form converters and control method for photovoltaic energy storage system
Liu et al. Extendable multiport high step-up DC–DC converter for photovoltaic-battery systems with reduced voltage stress on switches/diodes
CN113949269A (en) Bridgeless Buck-Boost Power Factor Correction Converter and Control System
JP2003088130A (en) Built-in battery type power converter
Ravivarman et al. Non-isolated modified quadratic boost converter with midpoint output for solar photovoltaic applications
Li et al. Design and analysis of integrated bidirectional dc-dc converter for energy storage systems
CN118572836B (en) A battery management circuit and energy storage system
WO2021258935A1 (en) High-buck modular direct-current power supply
CN112350606B (en) Port control device and method of photovoltaic system and photovoltaic system
CN114244101A (en) Switched capacitor resonant DC converter
CN115189550A (en) Control device and control method of power conversion system
CN116436278A (en) A kind of AC-DC multiplexing power converter and its control method
CN113691122B (en) Switched capacitor type modular high-voltage-reduction-ratio direct-current power supply and control method thereof
CN215956288U (en) Multi-level inverter circuit
Ahmeti et al. Study of a Multi-Port DC-DC Converter for an Energy Storage System

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination