WO2023092696A1 - 一种多功能自检合闸电源装置 - Google Patents

一种多功能自检合闸电源装置 Download PDF

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Publication number
WO2023092696A1
WO2023092696A1 PCT/CN2021/137156 CN2021137156W WO2023092696A1 WO 2023092696 A1 WO2023092696 A1 WO 2023092696A1 CN 2021137156 W CN2021137156 W CN 2021137156W WO 2023092696 A1 WO2023092696 A1 WO 2023092696A1
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Prior art keywords
module
power supply
transformer
inverter
supply device
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PCT/CN2021/137156
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English (en)
French (fr)
Inventor
詹柏青
盛建科
刘湘
廖晓斌
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Hunan Fullde Electric Co Ltd
Guangdong Fullde Electronics Co Ltd
Zhuzhou Fullde Rail Transit Research Institute Co Ltd
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Hunan Fullde Electric Co Ltd
Guangdong Fullde Electronics Co Ltd
Zhuzhou Fullde Rail Transit Research Institute Co Ltd
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Publication of WO2023092696A1 publication Critical patent/WO2023092696A1/zh
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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 feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H02J3/40—Synchronisation of generators for connection to a network or to another generator
    • H02J3/42—Synchronisation of generators for connection to a network or to another generator with automatic parallel connection when synchronisation is achieved

Definitions

  • the invention relates to the technical field of power supply devices, in particular to a multifunctional self-checking and closing power supply device.
  • the relay protection action that may be caused by a large-capacity transformer, whether there is an inter-turn short circuit in the transformer, whether there is a problem with the insulation of the transformer, and the interference and instability of the closing coil power supply of the high-voltage switchgear are likely to cause high voltage.
  • the switchgear cannot be closed.
  • the excitation surge current can be as large as two times the rated current. Fifteen times or more, it may cause high-voltage switch tripping, line voltage fluctuations, etc.; when the transformer is powered on, a large excitation inrush current will be generated instantly, especially when it is no-load, it can reach up to dozens of times, even if it is pre-magnetized. This may cause the relay protection to operate, and even affect the power supply of other equipment. If it is an isolated grid, it may cause the generator to trip. In order to reduce the impact on the grid when a large transformer is connected to the grid, one of the most effective methods is to pre-magnetize the transformer before connecting to the grid to suppress the inrush current.
  • the current solution on the market 1. Connect a small transformer in parallel, 1% of the capacity is enough, connect its secondary side to the secondary side of a large transformer, connect the primary side to the grid, and usually send power to the small transformer, which is equivalent to Pre-magnetize the large-scale transformer, so that once the large-scale transformer is started, the inrush current will drop significantly, so as not to cause a large impact on the power grid. Once the large-scale transformer is connected to the power grid, the pre-magnetization transformer will stop working; 2. The pre-magnetization of the transformer is connected in series, and a small-capacity pre-magnetization transformer is connected in series in the main transformer line to achieve inrush current suppression. 3.
  • the inrush current suppressor by capturing the phase of residual magnetism, finds the best closing angle, which can suppress the current to less than 3 times.
  • the shortcoming cannot be captured for the first time, and it cannot be captured without residual magnetism after a long time; 4.
  • Zero start Step-up the transformer is switched on before the generator is excited, and the voltage is slowly raised, which is suitable for 1 to 1, and it is not suitable for multiple generators connected in parallel to the busbar; 5.
  • Soft start one side parallel soft start, after the soft start The disadvantage of the main switch is that if both sides can transmit power, two soft starts are required; 6. Connect resistors in series for pre-magnetization, and connect resistors in series in the main transformer line to achieve inrush current suppression.
  • the operation status of the transformer directly determines the safety, stability and power supply reliability of the power system. Once an accident occurs, it will take a long time to repair and the impact will be serious. Therefore, how to effectively reduce the impact of the excitation inrush has become an urgent problem to be solved.
  • the operation status of the transformer directly determines the safety, stability and power supply reliability of the power system. Once an accident occurs, it will take a long time to repair and the impact will be serious. Therefore, how to effectively reduce the impact of the excitation inrush has become an urgent problem to be solved.
  • the purpose of the invention is to provide a multifunctional self-checking closing power supply device for the above-mentioned shortcomings in the prior art.
  • a multi-functional self-checking and switching power supply device including a battery energy storage module, a boost module, an inverter module, a control module, a transformer, a switch, a voltage transformer PT1, a voltage transformer PT2 and amplitude phase detection module;
  • the output end of the battery energy storage module is connected to a booster module; the booster module is connected to the input end of the inverter module; the output end of the inverter module is connected to the secondary side of the transformer; the primary side of the transformer is connected to the One end of the switch is connected; one end of the switch is connected with the voltage transformer PT2; the other end of the switch is connected with the voltage transformer PT1; the voltage transformer PT2 and the voltage transformer PT1 are respectively connected with the control module; the control The module is connected to the control terminal of the inverter module; the boost module and the battery energy storage module are respectively connected to the control module.
  • the multifunctional self-inspection closing power supply device further includes a battery charging module; the battery charging module is connected to the input end of the battery energy storage module.
  • the invention further provides that the multifunctional self-checking and switching power supply device further includes a power supply operation module; the power supply operation module is used to control the operation of the battery energy storage module; and the power supply operation module is connected to the control module.
  • the invention further provides that the boost module is a DC-DC boost module.
  • the inverter module includes several IGBT modules, several inverter inductors, and several inverter capacitors; the IGBT modules, inverter inductors, and inverter capacitors form an IGBT three-phase PWM inverter module; the control terminal of the IGBT module is connected to the control module.
  • the present invention further provides that the switch is a contactor.
  • the controller created by the invention can automatically adjust the amplitude and phase of the output of the inverter module until it is consistent with the amplitude and phase of the incoming power grid of the switch cabinet, and then send the closing signal of the switch cabinet, and the circuit breaker of the switch cabinet starts closure.
  • a large-scale transformer starts to close, a magnetic field with the same amplitude and phase as the incoming power grid has been established first, and the inrush current will be greatly reduced without causing a large excitation inrush current impact on the power grid.
  • Fig. 1 is the schematic diagram of the circuit created by the present invention
  • a multifunctional self-checking closing power supply device described in this embodiment includes a battery energy storage module 1, a boost module 2, an inverter module 3, a control module 4, a transformer 5, a switch 6, Voltage transformer PT1, voltage transformer PT2 and amplitude phase detection module 7;
  • the output end of the battery energy storage module 1 is connected to the boost module 2; the boost module 2 is connected to the input end of the inverter module 3; the output end of the inverter module 3 is connected to the secondary side of the transformer 5;
  • the primary side of the transformer 5 is connected to one end of the switch 6; one end of the switch 6 is connected to the voltage transformer PT2; the other end of the switch 6 is connected to the voltage transformer PT1; the voltage transformer PT2 and the voltage transformer
  • the PT1 is respectively connected to the control module 4; the control module 4 is connected to the control terminal of the inverter module 3; the boost module 2 and the battery energy storage module 1 are respectively connected to the control module 4.
  • the multifunctional self-inspection closing power supply device described in this embodiment uses the booster module 2 to make the output of the battery energy storage module 1 reach the required voltage, and provides the power supply for the closing operation of the switch 6 cabinet ;
  • the battery energy storage module 1 reaches the voltage value required by the DC bus of the inverter module 3 through the boost module 2, and outputs the three-phase sine wave voltage to the secondary side of the transformer 5 through the inverter module 3.
  • Ratio boosted to the primary side of the primary side and then output the signal to the controller in the amplitude and phase detection module 7 through the sampling feedback signal of the voltage transformer PT2 and the voltage transformer PT1.
  • the controller can be a single-chip microcomputer, and the controller automatically adjusts the inverter.
  • the battery energy storage module 1 reaches the voltage value required by the DC bus of the inverter module 3 through the booster module 2, and the inverter output voltage reaches
  • the secondary side of the transformer 5 is boosted to the primary side through the transformation ratio of the transformer 5, and then the sampling feedback signal of the voltage transformer PT2 and the voltage transformer PT1 is used to automatically determine whether there is a fault inside the transformer 5 in the amplitude and phase detection module 7, Such as transformer 5 winding inter-turn short circuit, insulation resistance and so on.
  • the multifunctional self-inspection closing power supply device also includes a battery charging module 8; the battery charging module 8 is connected to the input end of the battery energy storage module 1 .
  • the battery energy storage module 1 can be charged in the battery charging module 8 through an external power source; the battery energy storage module 1 can also be charged with a large-capacity transformer 5 after the switch 6 is closed.
  • a multifunctional self-inspection closing power supply device described in this embodiment said multifunctional self-inspection closing power supply device also includes a power supply operation module 9; said power supply operation module 9 is used to control the battery energy storage module 1 to work ; The power operation module 9 is connected to the control module 4 .
  • the power operation module 9 can be a button part or a touch part or the like.
  • the boosting module 2 is a DC-DC boosting module 2 .
  • the battery energy storage module 1 reaches the voltage value required by the DC bus of the inverter module 3 through the booster module 2 .
  • the inverter module 3 includes several IGBT modules 31, several inverter inductors 32 and several inverter capacitors 33; the IGBT modules 31, The inverter inductor 32 and the inverter capacitor 33 form an IGBT three-phase PWM inverter module 3 ; the control terminal of the IGBT module 31 is connected to the control module 4 .
  • the number of IGBT modules 31 is six, and the number of inverter inductors 32 and inverter capacitors 33 are respectively three, thereby forming the IGBT three-phase PWM inverter module 3, wherein the controller controls the gate of the IGBT module 31 , thereby adjusting the amplitude and phase of the inverter module 3 output.
  • the switch 6 is a contactor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种多功能自检合闸电源装置，涉及电源装置技术领域，包括电池储能模块（1）、升压模块（2）、逆变模块（3）、控制模块（4）、变压器（5）、开关（6）、电压互感器PT1、电压互感器PT2以及幅值相位检测模块（7）。控制模块（4）能够自动调整逆变模块（3）输出的幅值以及相位，直至与开关柜的进线电网的幅值以及相位一致时再发出开关柜的合闸信号，开关柜的断路器开始闭合。当大型的变压器（5）启动合闸时，已经先建立与进线电网同幅值以及同相位的磁场，浪涌电流会大幅下降，不会对电网造成大的励磁涌流冲击。

Description

一种多功能自检合闸电源装置 技术领域
本发明创造涉及电源装置技术领域，具体涉及一种多功能自检合闸电源装置。
 背景技术
在接入电网时，大容量的变压器可能造成的继电保护动作、变压器是否存在匝间短路、变压器的绝缘是否有问题、高压开关柜合闸线圈电源的干扰及不稳定性等系列容易引起高压开关柜合闸合不上。
在小型用户变电所以及开闭所中，由于开关柜的数量较少，线路结构简单，多为单回路进线，通常没有所用电或外电源，这给断路器的操作电源的选取带来了一定的困难。
目前，小型变电所的断路器操作电源主要有以下几种方式：TV供电方式、DC供电方式、UPS供电方式；大容量的变压器接入电网时，励磁浪涌电流可大到额定电流的二十五倍以上，有可能造成高压开关跳闸，线路电压波动等情况；变压器通电时，瞬间会产生很大的励磁涌流，特别是空载的时候最高可达几十倍，即使预充磁也有几倍到十几倍，这样可能造成继电保护动作，甚至会影响到其他设备供电，如果是孤网可能造成发电机跳闸。为了减小大型变压器接入电网时对电网的冲击，一种最有效的方法是，给变压器接入电网前预充磁来抑制励磁涌流。
现市场上的解决方案：1.并联一个小变压器，1%的容量都可以了，将其副边与大型变压器的副边连接起来，原边与电网连接，平常给小变压器送电，相当于给大型变压器预充磁，这样一来，一旦大型的变压器启动，浪涌电流会大幅下降，不至于对电网造成大的冲击，一旦大型变压器接入电网，预充磁变压器就停止工作；2.串接变压器预充磁，在主变压器线路中串接一个小容量的预充磁变压器以实现涌流抑制。3.涌流抑制器，通过捕捉剩磁相位，找到最佳合闸角度，可抑制到3倍电流以下，缺点第一次没法捕捉，时间长了没剩磁也没法捕捉；4.零起升压，发电机起励前投变压器，慢慢升电压，适合1对1，多台发电机并联在母排就不适合了；5.软启动，一侧并联软启动，软启动完成后投主开关，缺点是如果双侧都可送电，则要两个软启动；6.串接电阻预充磁，在主变压器线路中串接电阻以实现涌流抑制。
变压器运行状况直接决定电力系统运行的安全，稳定和供电可靠性，一旦发生事故，则所需修复的时间长，影响严重；故如何能够有效减少励磁涌流冲击成为亟待解决的问题。
 技术问题
变压器运行状况直接决定电力系统运行的安全，稳定和供电可靠性，一旦发生事故，则所需修复的时间长，影响严重；故如何能够有效减少励磁涌流冲击成为亟待解决的问题。
 技术解决方案
本发明创造的目的是针对现有技术中的上述不足，提供了一种多功能自检合闸电源装置。
本发明创造的目的通过以下技术方案实现：一种多功能自检合闸电源装置，包括电池储能模块、升压模块、逆变模块、控制模块、变压器、开关、电压互感器PT1、电压互感器PT2以及幅值相位检测模块；
所述电池储能模块的输出端升压模块连接；所述升压模块与逆变模块的输入端连接；所述逆变模块的输出端与变压器的副边连接；所述变压器的原边与开关的一端连接；所述开关的一端与电压互感器PT2连接；所述开关的另一端与电压互感器PT1连接；所述电压互感器PT2以及电压互感器PT1分别与控制模块连接；所述控制模块与逆变模块的控制端连接；所述升压模块以及电池储能模块分别与控制模块连接。
本发明创造进一步设置为，所述多功能自检合闸电源装置还包括电池充电模块；所述电池充电模块与电池储能模块的输入端连接。
本发明创造进一步设置为，所述述多功能自检合闸电源装置还包括电源操作模块；所述电源操作模块用于控制电池储能模块工作；所述电源操作模块与控制模块连接。
本发明创造进一步设置为，所述升压模块为DC-DC升压模块。
本发明创造进一步设置为，所述逆变模块包括若干个IGBT模块、若干个逆变电感以及若干个逆变电容；所述IGBT模块、逆变电感以及逆变电容形成有IGBT三相PWM逆变模块；所述IGBT模块的控制端与控制模块连接。
本发明创造进一步设置为，所述开关为接触器。
 有益效果
本发明创造通过的控制器能够自动调整逆变模块输出的幅值以及相位，直至与开关柜的进线电网的幅值以及相位一致时再发出开关柜的合闸信号，开关柜的断路器开始闭合。当大型的变压器启动合闸时，已经先建立与进线电网同幅值以及同相位的磁场，浪涌电流会大幅下降，不会对电网造成大的励磁涌流冲击。
 附图说明
利用附图对发明创造作进一步说明，但附图中的实施例不构成对本发明创造的任何限制，对于本领域的普通技术人员，在不付出创造性劳动的前提下，还可以根据以下附图获得其它的附图。
图1是本发明创造的电路原理图；
其中：1、电池储能模块；2、升压模块；3、逆变模块；31、IGBT模块；32、逆变电感；33、逆变电容；4、控制模块；5、变压器；6、开关；7、幅值相位检测模块；8、电池充电模块；9、电源操作模块。
 本发明的实施方式
结合以下实施例对本发明创造作进一步描述。
由图1所示，本实施例所述的一种多功能自检合闸电源装置，包括电池储能模块1、升压模块2、逆变模块3、控制模块4、变压器5、开关6、电压互感器PT1、电压互感器PT2以及幅值相位检测模块7；
所述电池储能模块1的输出端升压模块2连接；所述升压模块2与逆变模块3的输入端连接；所述逆变模块3的输出端与变压器5的副边连接；所述变压器5的原边与开关6的一端连接；所述开关6的一端与电压互感器PT2连接；所述开关6的另一端与电压互感器PT1连接；所述电压互感器PT2以及电压互感器PT1分别与控制模块4连接；所述控制模块4与逆变模块3的控制端连接；所述升压模块2以及电池储能模块1分别与控制模块4连接。
具体地，本实施例所述的多功能自检合闸电源装置，本实施例通过升压模块2使得电池储能模块1的输出达到所需要的电压，提供给开关6柜的合闸操作电源；电池储能模块1通过升压模块2达到逆变模块3的直流母线所需的电压值，通过逆变模块3逆变输出三相正弦波电压到变压器5的副边，通过变压器5的变比升压到一次侧原边，然后通过电压互感器PT2与电压互感器PT1的采样回馈信号在幅值相位检测模块7中输出信号至控制器，该控制器可以为单片机，控制器自动调整逆变模块3输出的幅值以及相位，直至与开关6柜的进线电网的幅值以及相位一致时再发出开关6柜的合闸信号，开关6柜的断路器开始闭合。这样一来，一旦大型的变压器5启动合闸时，已经先建立与进线电网同幅值以及同相位的磁场，浪涌电流会大幅下降，不会对电网造成大的励磁涌流冲击。另外，当需要进行检查的时候，设定变压器5原边与副边电压值，电池储能模块1通过升压模块2达到逆变模块3的直流母线所需的电压值，逆变输出电压到变压器5的副边，通过变压器5的变比升压到一次侧，然后通过电压互感器PT2与电压互感器PT1的采样回馈信号在幅值相位检测模块7中自动判断变压器5内部是否存在故障，如变压器5的绕组匝间短路、绝缘电阻等。
本实施例所述的一种多功能自检合闸电源装置，所述多功能自检合闸电源装置还包括电池充电模块8；所述电池充电模块8与电池储能模块1的输入端连接。具体地，本实施例可以通过外部电源在电池充电模块8中对电池储能模块1进行充电；也可以当开关6柜合闸后利用大容量的变压器5对电池储能模块1进行充电
本实施例所述的一种多功能自检合闸电源装置，所述述多功能自检合闸电源装置还包括电源操作模块9；所述电源操作模块9用于控制电池储能模块1工作；所述电源操作模块9与控制模块4连接。通过上述设置便于用户控制电池储能模块1开关6；其中电源操作模块9可以为按钮件也可以为触摸件等。
本实施例所述的一种多功能自检合闸电源装置，所述升压模块2为DC-DC升压模块2。具体地，通过上述设置使得电池储能模块1通过升压模块2达到逆变模块3的直流母线所需的电压值。
本实施例所述的一种多功能自检合闸电源装置，所述逆变模块3包括若干个IGBT模块31、若干个逆变电感32以及若干个逆变电容33；所述IGBT模块31、逆变电感32以及逆变电容33形成有IGBT三相PWM逆变模块3；所述IGBT模块31的控制端与控制模块4连接。具体地，IGBT模块31的数量为六个，逆变电感32以及逆变电容33的数量分别为三个，从而组成IGBT三相PWM逆变模块3，其中控制器通过控制IGBT模块31的栅极，从而调整逆变模块3输出的幅值以及相位。
本实施例所述的一种多功能自检合闸电源装置，所述开关6为接触器。
最后应当说明的是，以上实施例仅用以说明本发明创造的技术方案，而非对本发明创造保护范围的限制，尽管参照较佳实施例对本发明创造作了详细地说明，本领域的普通技术人员应当理解，可以对本发明创造的技术方案进行修改或者等同替换，而不脱离本实用新型技术方案的实质和范围。

Claims (6)

  1. 一种多功能自检合闸电源装置，其特征在于：包括电池储能模块(1)、升压模块(2)、逆变模块(3)、控制模块(4)、变压器(5)、开关(6)、电压互感器PT1、电压互感器PT2以及幅值相位检测模块(7)；
    所述电池储能模块(1)的输出端升压模块(2)连接；所述升压模块(2)与逆变模块(3)的输入端连接；所述逆变模块(3)的输出端与变压器(5)的副边连接；所述变压器(5)的原边与开关(6)的一端连接；所述开关(6)的一端与电压互感器PT2连接；所述开关(6)的另一端与电压互感器PT1连接；所述电压互感器PT2以及电压互感器PT1分别与控制模块(4)连接；所述控制模块(4)与逆变模块(3)的控制端连接；所述升压模块(2)以及电池储能模块(1)分别与控制模块(4)连接。
  2. 根据权利要求1所述的一种多功能自检合闸电源装置，其特征在于：所述多功能自检合闸电源装置还包括电池充电模块(8)；所述电池充电模块(8)与电池储能模块(1)的输入端连接。
  3. 根据权利要求1所述的一种多功能自检合闸电源装置，其特征在于：所述述多功能自检合闸电源装置还包括电源操作模块(9)；所述电源操作模块(9)用于控制电池储能模块(1)工作；所述电源操作模块(9)与控制模块(4)连接。
  4. 根据权利要求1所述的一种多功能自检合闸电源装置，其特征在于：所述升压模块(2)为DC-DC升压模块(2)。
  5. 根据权利要求1所述的一种多功能自检合闸电源装置，其特征在于：所述逆变模块(3)包括若干个IGBT模块(31)、若干个逆变电感(32)以及若干个逆变电容(33)；所述IGBT模块(31)、逆变电感(32)以及逆变电容(33)形成有IGBT三相PWM逆变模块(3)；所述IGBT模块(31)的控制端与控制模块(4)连接。
  6. 根据权利要求1所述的一种多功能自检合闸电源装置，其特征在于：所述开关(6)为接触器。
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