WO2023213330A1 - Medium-high voltage suspended apparatus and power supply switching circuit thereof - Google Patents

Medium-high voltage suspended apparatus and power supply switching circuit thereof Download PDF

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Publication number
WO2023213330A1
WO2023213330A1 PCT/CN2023/097954 CN2023097954W WO2023213330A1 WO 2023213330 A1 WO2023213330 A1 WO 2023213330A1 CN 2023097954 W CN2023097954 W CN 2023097954W WO 2023213330 A1 WO2023213330 A1 WO 2023213330A1
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WO
WIPO (PCT)
Prior art keywords
voltage
power supply
low
switching circuit
main control
Prior art date
Application number
PCT/CN2023/097954
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French (fr)
Chinese (zh)
Inventor
刁长晟
刘松斌
王艳双
顾硕
郗小龙
Original Assignee
海南金盘智能科技股份有限公司
海南金盘科技储能技术有限公司
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Publication date
Priority claimed from CN202221069695.5U external-priority patent/CN217406243U/en
Priority claimed from CN202210485359.7A external-priority patent/CN114844196A/en
Application filed by 海南金盘智能科技股份有限公司, 海南金盘科技储能技术有限公司 filed Critical 海南金盘智能科技股份有限公司
Publication of WO2023213330A1 publication Critical patent/WO2023213330A1/en

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Classifications

    • 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

Definitions

  • the present application relates to the field of circuit electronics, and in particular to a medium and high voltage direct-mounted device and its power switching circuit.
  • the power switching of existing medium and high voltage direct-mounted devices is usually through a control switch. After the control circuit is disconnected, the power supply connected to the main control system is changed through the connection method in the circuit, thereby switching the power supply. However, in this way, This will cause the system to have a power supply gap in a short period of time. In industrial production, even a short-term power outage may cause large losses, and there may be inability to switch in time due to faults in relays or control switches. question.
  • the purpose of this application is to provide a power switching circuit to solve the problem of the current power switching circuit being unable to switch seamlessly, thereby causing losses in production and life.
  • this application provides a power switching circuit for use in medium and high voltage direct-mounted devices, including: relays, high-voltage diodes, low-voltage diodes, high-voltage power supplies, and low-voltage power supplies. source;
  • the coil of the relay is connected to the main control system of the medium and high-voltage direct-mounted device, the first switch end of the relay is connected to the high-voltage power supply, and the second switch end of the relay is connected to the low-voltage power supply.
  • the signal of the main control system controls the power supply to the coil, thereby controlling the opening and closing of the first switch terminal and the second switch terminal to facilitate the control of the opening and closing of the high-voltage power supply and the low-voltage power supply;
  • the input end of the high-voltage diode is connected to the output end of the high-voltage power supply, and the output end is connected to the power supply end of the main control system;
  • the input end of the low-voltage diode is connected to the output end of the low-voltage power supply, and the output end is connected to the power supply end of the main control system.
  • the coil of the relay includes a first coil and a second coil.
  • the first coil corresponds to the first switch terminal and is used to control the opening and closing of the first switch terminal.
  • the second coil Corresponding to the second switch terminal, it is used to control the opening and closing of the second switch terminal.
  • it also includes: a voltage sampling device, one end of the voltage sampling device is connected to the main control system, and the other end is connected to the low-voltage power supply.
  • both the high-voltage diode and the low-voltage diode are Schottky diodes.
  • the high-voltage power supply is a high-voltage power supply obtained through a current transformer.
  • the low-voltage power supply is a DC UPS power supply or an AC UPS power supply.
  • the medium and high-voltage direct-mounted device is a medium- and high-voltage direct-mounted photovoltaic power generation device
  • the high-voltage power supply is a power source obtained through grid-connected high potential
  • the low-voltage power source is an MPPT link taken from the DC-DC conversion of the photovoltaic power generation system. the bus voltage after.
  • it also includes: an alarm device connected to the main control system.
  • this application also provides a medium and high voltage direct-mounted device, including the above-mentioned power switching circuit.
  • the power switching circuit provided by this application is used in medium and high-voltage direct-mounted devices, including relays, high-voltage diodes, low-voltage diodes, high-voltage power supplies, low-voltage power supplies.
  • the main control system of the medium- and high-voltage direct-mounted devices is connected to the control end of the relay to control the high voltage.
  • the power supply and the low-voltage power supply are switched on and off.
  • the outputs of the high-voltage power supply and the low-voltage power supply are connected to the inputs of the high-voltage diode and the low-voltage diode respectively, and the outputs of the high-voltage diode and the low-voltage diode are connected to the power supply end of the main control system, so that in the main control system
  • the control relay allows the high-voltage power supply and the low-voltage power supply to operate at the same time, and selectively compares the input through the high-voltage diode and the low-voltage diode. That is, the power supply with high voltage supplies power to the main control system, so it is the high-voltage diode that supplies power to the main control system.
  • the main control system controls the high-voltage power supply to be partially disconnected, so that the low-voltage power supply is supplied to realize seamless switching of the power supply. Therefore, compared with the existing technology, this application , the low-voltage power supply is always running, so there will be no problem of power supply interruption during switching, thus achieving seamless power switching.
  • the medium and high voltage direct-mounted device provided by this application includes the above-mentioned power switching circuit, so the beneficial effects are the same as above.
  • FIG. 1 is a circuit diagram of a power switching circuit provided by an embodiment of the present application.
  • the core of this application is to provide a power switching circuit to solve the problem of the current power switching circuit being unable to switch seamlessly, thereby causing losses in production and life.
  • Figure 1 is a circuit diagram of a power switching circuit provided by an embodiment of the present application, which is used in medium and high Pressure direct hanging device, as shown in Figure 1, the power switching circuit includes: relay U1, high-voltage diode D1, low-voltage diode D2, high-voltage power supply 1, low-voltage power supply 2;
  • the coil of relay U1 is connected to the main control system 3 of the medium and high-voltage direct-mounted device.
  • the first switch end of the relay U1 is connected to the high-voltage power supply 1, and the second switch end of the relay U1 is connected to the low-voltage power supply 2, which is used according to the signal of the main control system 3.
  • Control the power supply to the coil thereby controlling the opening and closing of the first switch end and the second switch end to control the opening and closing of the high-voltage power supply 1 and the low-voltage power supply 2;
  • the input end of the high-voltage diode D1 is connected to the output end of the high-voltage power supply 1, and the output end is connected to the power supply end of the main control system 3;
  • the input terminal of the low-voltage diode D2 is connected to the output terminal of the low-voltage power supply 2 , and the output terminal is connected to the power supply terminal of the main control system 3 .
  • Relay also called relay
  • Relay is an electronic control device. It has a control system (also called input loop) and a controlled system (also called output loop). It is usually used in automatic control circuits. It is actually An "automatic switch” that uses a smaller current to control a larger current. Therefore, it plays the roles of automatic adjustment, safety protection, and conversion circuit in the circuit.
  • the specific type of the relay is not limited in this embodiment.
  • the relay U1 is composed of a coil and a contact group
  • the graphical symbol of the relay U1 in the circuit diagram also includes two parts. Part: a rectangular box represents the coil; a set of contact symbols represents the contact combination.
  • the first switch terminal and the second switch terminal are both contacts of the relay U1. It can be understood that in this embodiment
  • the coil's control method for the first switch end and the second switch end can be solved by using two contact points with different response modes, or it can be solved by using two coils corresponding to the two switch ends respectively, which is not specifically limited here.
  • connection method of relay U1 is not limited, that is, the specific wiring of the first switch terminal, the second switch terminal and the coil of relay U1 and the corresponding circuit connection method are not specifically limited.
  • the specific types and devices of the high-voltage power supply 1, the low-voltage power supply 2 and the corresponding main control system 3 are not limited.
  • the high-voltage power supply 1, the low-voltage power supply 2 and the corresponding main control system 3 There are different preferences for the control device. For example, due to power consumption limitations, in order to fully ensure battery utilization and efficiency, battery state-of-charge discharge efficiency, system efficiency, etc., it is not recommended that the power supply be directly provided by the battery.
  • the power is taken from the voltage (10/35kV); or in the medium and high direct-mounted photovoltaic power generation system, for the high reliability of the system, the power supply redundancy part needs to be taken from different power supplies, and the low-voltage power supply 2 is taken from the photovoltaic power generation system.
  • the bus voltage after the Maximum Power Point Tracking (MPPT) link of DC-DC conversion, high-voltage power supply 1 is taken from the high-potential grid-connected side.
  • MPPT Maximum Power Point Tracking
  • Diode among electronic components, is a device with two electrodes that only allows current to flow in one direction. Many uses are to apply its rectifying function. Varactors are used as electronically adjustable capacitors. The current directionality possessed by most diodes is usually called the "rectifying" function. The most common function of a diode is to only allow current to pass in one direction (called forward bias) and block it in the reverse direction (called reverse bias). Therefore, a diode can be thought of as an electronic version of a check valve.
  • the main control system 3 controls the relay when it needs power U1, thereby closing the corresponding first switch terminal and the second switch terminal of the high-voltage power supply 1 and the low-voltage power supply 2. By closing the switch terminals, the high-voltage power supply 1 and the low-voltage power supply 2 are started simultaneously.
  • the high-voltage power supply 1 with a higher voltage is connected to the power supply of the main control system 3, while the low-voltage power supply 2 with a lower voltage is blocked.
  • the low-voltage power supply 2 needs to be connected only the main control system 3 needs to be disconnected. Just turn on the first switch terminal. At this time, the voltage of the high-voltage power supply 1 is 0, so the low-voltage power supply 2 is connected.
  • the dual-diode structure used in this embodiment has lower cost than the comparator.
  • the power switching circuit provided in this embodiment is used in medium and high voltage direct-mounted devices, and includes relay U1, high-voltage diode D1, low-voltage diode D2, high-voltage power supply 1, low-voltage power supply 2, and the main control system 3 of the medium and high-voltage direct-mounted device connected to the relay.
  • the control end of U1 controls the opening and closing of high-voltage power supply 1 and low-voltage power supply 2.
  • the outputs of high-voltage power supply 1 and low-voltage power supply 2 are respectively connected to the inputs of high-voltage diode D1 and low-voltage diode D2, and the outputs of high-voltage diode D1 and low-voltage diode D2 are connected.
  • the power supply supplies power to the main control system 3, so the high-voltage diode D1 supplies power to the main control system 3.
  • the main control system 3 controls the high-voltage power supply 1 to be partially disconnected, so that the low-voltage power supply 2 Therefore, compared with the existing technology, in this application, when the high-voltage power supply 1 is disconnected, the low-voltage power supply 2 is always in operation, so there will be no problem of power supply interruption during switching. , thus achieving seamless power switching.
  • the coil of the relay U1 includes a first coil and a second coil.
  • the first coil corresponds to the first switch terminal and is used to control the first switch.
  • the second coil corresponds to the second switch terminal and is used to control the opening and closing of the second switch terminal.
  • relay U1 controls the closing of the contacts through the electromagnetic induction between the coil and the contacts, that is, the coil is energized and de-energized, thereby controlling the closing of the contacts. Therefore, in this embodiment, a double The coil corresponds to the double-contact relay U1 form, so that the first contact and the second contact can be accurately controlled, which increases the controllability of the circuit.
  • the circuit also includes: a voltage sampling device 4. One end of the voltage sampling device 4 is connected to the main control system 3, and the other end is connected to the low-voltage power supply 2.
  • the voltage sampling device 4 is for the voltage sampling of the low-voltage power supply 2. It can be understood that the voltage of the high-voltage power supply 1 is generally too high and the magnitude is large, and because the voltage accuracy is not high when the high-voltage power supply is provided, the voltage accuracy is not high. Generally, high-voltage power supply 1 is not sampled, but for low-voltage power supply 2, low-voltage power supply 2 is sampled to ensure the stability of the voltage of the medium and high-voltage direct-mounted device in the low-voltage state, and is input to the main control system through voltage sampling control. 3, thereby ensuring the stable operation of the main control system 3 under low voltage.
  • the type of diode is not limited in the above embodiment, and a preferred solution is provided here.
  • the high-voltage diode D1 and the low-voltage diode D2 are both Schottky diodes.
  • the current input to the main control system 3 may be AC or DC. It is understood that by setting the high-voltage diode D1 and the low-voltage diode D2 as Schottky diodes, it is possible to stably input the voltage to the main control system 3 while ensuring the voltage access selection of the high-voltage diode D1 and the low-voltage diode D2.
  • the power supply regulates or rectifies the input high-voltage current or low-voltage current, thereby ensuring the stability of the circuit and maintaining the stable operation of the main control system 3 power supply.
  • the high-voltage power supply 1 is not specifically limited, and a preferred solution is proposed here.
  • the high-voltage power supply 1 is a high-level power supply obtained through a current transformer.
  • the principle of current transformer is based on the principle of electromagnetic induction.
  • the current transformer is composed of a closed core and windings. Its primary side winding has a small number of turns and is connected in series with the circuit that needs to measure the current, so it often has all the current of the line flowing through it. Its secondary side winding has a relatively large number of turns and is connected in series with measuring instruments and protection circuits. When the current transformer is working, its secondary side loop is always closed, so the impedance of the series coil of the measuring instrument and the protection loop is very small, and the working state of the current transformer is close to a short circuit. Current transformers are used to convert large currents on the primary side into small currents on the secondary side. The secondary side cannot be open circuited.
  • the function of the current transformer is to convert a larger primary current into a smaller secondary current through a certain transformation ratio, which is used for protection, measurement and other purposes.
  • the current transformer ensures the safety of the components in the circuit. , to avoid excessive current from burning components caused by high-voltage power supply 1 being directly connected to the circuit.
  • the low-voltage power supply 2 is not limited, and a preferred solution is proposed here.
  • the low-voltage power supply 2 is a DC UPS power supply or an AC UPS power supply.
  • Uninterruptible Power System is a constant voltage and constant frequency uninterruptible power supply that contains an energy storage device and uses an inverter as its main component. It is mainly used to provide uninterrupted power supply to a single computer, computer network system or other power electronic equipment.
  • the UPS stabilizes the mains power and supplies it to the load.
  • the UPS is an AC mains voltage stabilizer, and it also charges the internal battery; when the mains power is interrupted (accidental power outage)
  • the UPS will immediately continue to supply 220V AC power to the load through the inverter conversion method from the battery inside the machine, so that the load can maintain normal operation and protect the load software and hardware from damage.
  • UPS equipment usually provides protection against both overvoltage and undervoltage. By selecting DC UPS power supply or AC UPS power supply, the stable operation of the circuit in a low-voltage state can be maintained to avoid excessively low voltage.
  • the selection of high-voltage power supply 1 and the selection of low-voltage power supply 2 in the specific type of medium and high-voltage direct-mounted devices are not specifically limited.
  • the medium- and high-voltage direct-mounted devices are medium- and high-voltage direct-mounted photovoltaic power generation devices.
  • the high-voltage power supply 1 is the power obtained through the high potential of the grid connection
  • the low-voltage power supply 2 is the bus voltage obtained from the MPPT link of the DC-DC conversion of the photovoltaic power generation system.
  • photovoltaic is the abbreviation of solar photovoltaic power generation system.
  • the photovoltaic effect of the anode semiconductor material is a new power generation system that directly converts solar radiation energy into electrical energy.
  • Grid connection in the power industry refers to the connection of the transmission line of the generating unit to the transmission grid.
  • Maximum Power Point Tracking MPPT is the core technology used in upgraded products of traditional solar charge and discharge controllers.
  • the selected medium and high-voltage direct-mounted device is a photovoltaic power generation device
  • the selection of high-voltage power supply 1 and low-voltage power supply 2 is limited, thereby ensuring the maximum utilization of photovoltaic power generation and maintaining it under the photovoltaic system.
  • the stability of power supply enables self-generation control of photovoltaic power generation devices.
  • the main control system 3 fails to switch the power supply in time, it also includes: an alarm device, and the alarm device is connected to the main control system 3.
  • the alarm device provided in this embodiment will issue an alarm when it detects that the voltage connected in the power supply of the main control system 3 does not match the voltage required by the main control system 3.
  • the specific details of the alarm device are The type is not limited. It is understood that the alarm device can be a buzzer, a warning light, etc.
  • the preferred solution provided in this embodiment uses an alarm device to remind the user that there is a problem with the power supply in the main control system 3, so as to troubleshoot and avoid safety accidents.
  • this application also provides a medium and high voltage direct-mounted device, including the above-mentioned power switching circuit.
  • the medium and high voltage direct-mounted device provided by this application has an inclusive relationship with the above-mentioned power switching circuit, that is, the medium and high-voltage direct-mounted device includes the above-mentioned power switching circuit. Therefore, the specific embodiments and beneficial effects can be found in the power switching circuit section, and will not be described again here. .

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Abstract

A medium-high voltage suspended apparatus and a power supply switching circuit thereof. The power supply switching circuit comprises: a relay (U1), a high-voltage diode (D1), a low-voltage diode (D2), a high-voltage power supply (1) and a low-voltage power supply (2). A main control system (3) of the medium-high voltage suspended apparatus is connected to a control end of the relay (U1), so as to control the high-voltage power supply (1) and the low-voltage power supply (2) to be turned on and off. Selective comparison input is carried out by means of the high-voltage diode (D1) and the low-voltage diode (D2), so that a power supply having a large voltage supplies power to the main control system (3); therefore, the high-voltage diode (D1) supplies power to the main control system (3). When the operating power supply needs to be switched, the main control system (3) controls the high-voltage power supply (1) to be partially disconnected, such that power is supplied by the low-voltage power supply (2), achieving seamless power supply switching, and preventing the problem of power supply interruption.

Description

一种中高压直挂装置及其电源切换电路A medium and high voltage direct-hanging device and its power switching circuit
本申请要求于2022年5月6日提交中国专利局、申请号为202221069695.5、发明名称为“一种中高压直挂装置及其电源切换电路”的中国专利申请以及于2022年5月6日提交中国专利局、申请号为202210485359.7、发明名称为“一种中高压直挂装置及其电源切换电路”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application is required to be submitted to the China Patent Office on May 6, 2022, with the application number 202221069695.5 and the invention title "A medium and high-voltage direct-mounted device and its power switching circuit" and submitted on May 6, 2022 The Chinese Patent Office has the priority of the Chinese patent application with application number 202210485359.7 and the invention title "A medium and high-voltage direct-mounted device and its power switching circuit", the entire content of which is incorporated into this application by reference.
技术领域Technical field
本申请涉及电路电子领域，特别是涉及一种中高压直挂装置及其电源切换电路。The present application relates to the field of circuit electronics, and in particular to a medium and high voltage direct-mounted device and its power switching circuit.
背景技术Background technique
近年来，随着社会工业化的加快以及进步，对于高压用电情况越来越多，现目前常见的中高压直挂装置就包括，中高压直挂储能***，以及中高压直挂并网光伏发电***等等，而对于这些***，由于本身的中高位取电特性，通常需要对其电源进行切换。In recent years, with the acceleration and progress of social industrialization, there are more and more high-voltage electricity consumption situations. Nowadays, common medium and high-voltage direct-mounted devices include medium- and high-voltage direct-mounted energy storage systems, and medium- and high-voltage direct-mounted grid-connected photovoltaic systems. Power generation systems, etc., and for these systems, due to their own mid-to-high power-taking characteristics, their power supplies usually need to be switched.
现有的中高压直挂装置的电源切换通常是通过控制开关，从而控制电路断开后，通过电路中的连接方式改变接入主控***的电源，从而进行的电源切换，但如此一来，会导致***在短时间内，存在供电空隙，而在工业生产中，即便短时间的断电，都可能带来较大的损失，且存在由于继电器或控制开关等故障所导致的不能及时切换等问题。The power switching of existing medium and high voltage direct-mounted devices is usually through a control switch. After the control circuit is disconnected, the power supply connected to the main control system is changed through the connection method in the circuit, thereby switching the power supply. However, in this way, This will cause the system to have a power supply gap in a short period of time. In industrial production, even a short-term power outage may cause large losses, and there may be inability to switch in time due to faults in relays or control switches. question.
鉴于上述技术，寻找一种能实现无缝切换的电源切换电路是本领域技术人员亟待解决的问题。In view of the above technology, finding a power switching circuit that can achieve seamless switching is an urgent problem for those skilled in the art to solve.
发明内容Contents of the invention
本申请的目的是提供一种电源切换电路，以便于解决当前的电源切换电路由于无法无缝切换，从而导致带来生产生活的损失。The purpose of this application is to provide a power switching circuit to solve the problem of the current power switching circuit being unable to switch seamlessly, thereby causing losses in production and life.
为解决上述技术问题，本申请提供一种电源切换电路，应用于中高压直挂装置，包括：继电器，高压二极管，低压二极管，高压电源，低压电 源；In order to solve the above technical problems, this application provides a power switching circuit for use in medium and high voltage direct-mounted devices, including: relays, high-voltage diodes, low-voltage diodes, high-voltage power supplies, and low-voltage power supplies. source;
所述继电器的线圈与所述中高压直挂装置的主控***连接，所述继电器的第一开关端连接所述高压电源，所述继电器的第二开关端连接所述低压电源，用于根据所述主控***的信号控制对所述线圈的供电，从而控制所述第一开关端和所述第二开关端的开闭以便于控制所述高压电源以及所述低压电源的开闭；The coil of the relay is connected to the main control system of the medium and high-voltage direct-mounted device, the first switch end of the relay is connected to the high-voltage power supply, and the second switch end of the relay is connected to the low-voltage power supply. The signal of the main control system controls the power supply to the coil, thereby controlling the opening and closing of the first switch terminal and the second switch terminal to facilitate the control of the opening and closing of the high-voltage power supply and the low-voltage power supply;
所述高压二极管的输入端连接所述高压电源的输出端，输出端连接所述主控***的电源供应端；The input end of the high-voltage diode is connected to the output end of the high-voltage power supply, and the output end is connected to the power supply end of the main control system;
所述低压二极管的输入端连接所述低压电源的输出端，输出端连接所述主控***的电源供应端。The input end of the low-voltage diode is connected to the output end of the low-voltage power supply, and the output end is connected to the power supply end of the main control system.
优选地，所述继电器的所述线圈包括第一线圈和第二线圈，所述第一线圈与所述第一开关端对应，用于控制所述第一开关端的开闭，所述第二线圈与所述第二开关端对应，用于控制所述第二开关端的开闭。Preferably, the coil of the relay includes a first coil and a second coil. The first coil corresponds to the first switch terminal and is used to control the opening and closing of the first switch terminal. The second coil Corresponding to the second switch terminal, it is used to control the opening and closing of the second switch terminal.
优选地，还包括：电压采样装置，所述电压采样装置的一端连接所述主控***，另一端连接所述低压电源。Preferably, it also includes: a voltage sampling device, one end of the voltage sampling device is connected to the main control system, and the other end is connected to the low-voltage power supply.
优选地，所述高压二极管与所述低压二极管均为肖特基二极管。Preferably, both the high-voltage diode and the low-voltage diode are Schottky diodes.
优选地，所述高压电源为通过电流互感器获取得到的高位电源。Preferably, the high-voltage power supply is a high-voltage power supply obtained through a current transformer.
优选地，所述低压电源为直流UPS电源或交流UPS电源。Preferably, the low-voltage power supply is a DC UPS power supply or an AC UPS power supply.
优选地，所述中高压直挂装置为中高压直挂光伏发电装置，所述高压电源为通过并网高电位获取的电源，所述低压电源为取自光伏发电***DC-DC变换的MPPT环节后的母线电压。Preferably, the medium and high-voltage direct-mounted device is a medium- and high-voltage direct-mounted photovoltaic power generation device, the high-voltage power supply is a power source obtained through grid-connected high potential, and the low-voltage power source is an MPPT link taken from the DC-DC conversion of the photovoltaic power generation system. the bus voltage after.
优选地，还包括：报警装置，所述报警装置连接所述主控***。Preferably, it also includes: an alarm device connected to the main control system.
为解决上述问题，本申请还提供一种中高压直挂装置，包括上述的电源切换电路。In order to solve the above problems, this application also provides a medium and high voltage direct-mounted device, including the above-mentioned power switching circuit.
本申请所提供的电源切换电路，应用于中高压直挂装置，包括继电器，高压二极管，低压二极管，高压电源，低压电源，中高压直挂装置的主控***连接继电器的控制端，从而控制高压电源以及低压电源的开闭，高压电源以及低压电源的输出分别连接高压二极管以及低压二极管的输入，且高压二极管与低压二极管的输出连接主控***的电源供应端，从而在主控 ***正常工作时，控制继电器同时让高压电源与低压电源运行，通过高压二极管以及低压二极管进行选择性比较输入，即电压大的电源对主控***进行供电，因此是高压二极管对主控***进行供电，当需要切换运行电源时，则主控***控制高压电源部分断开，从而由低压电源进行供电，实现电源的无缝切换，因此与现有技术相比，本申请由于在断开高压电源时，低压电源一直处于运行状态，因此在切换时，不会存在电源供应中断的问题，从而实现了电源的无缝切换。The power switching circuit provided by this application is used in medium and high-voltage direct-mounted devices, including relays, high-voltage diodes, low-voltage diodes, high-voltage power supplies, low-voltage power supplies. The main control system of the medium- and high-voltage direct-mounted devices is connected to the control end of the relay to control the high voltage. The power supply and the low-voltage power supply are switched on and off. The outputs of the high-voltage power supply and the low-voltage power supply are connected to the inputs of the high-voltage diode and the low-voltage diode respectively, and the outputs of the high-voltage diode and the low-voltage diode are connected to the power supply end of the main control system, so that in the main control system When the system is working normally, the control relay allows the high-voltage power supply and the low-voltage power supply to operate at the same time, and selectively compares the input through the high-voltage diode and the low-voltage diode. That is, the power supply with high voltage supplies power to the main control system, so it is the high-voltage diode that supplies power to the main control system. , when it is necessary to switch the operating power supply, the main control system controls the high-voltage power supply to be partially disconnected, so that the low-voltage power supply is supplied to realize seamless switching of the power supply. Therefore, compared with the existing technology, this application , the low-voltage power supply is always running, so there will be no problem of power supply interruption during switching, thus achieving seamless power switching.
本申请提供的中高压直挂装置包含上述的电源切换电路，因此有益效果同上。The medium and high voltage direct-mounted device provided by this application includes the above-mentioned power switching circuit, so the beneficial effects are the same as above.
附图说明Description of the drawings
为了更清楚地说明本申请实施例，下面将对实施例中所需要使用的附图做简单的介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the embodiments of the present application more clearly, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, As far as workers are concerned, other drawings can also be obtained based on these drawings without exerting creative work.
图1为本申请实施例提供的一种电源切换电路的电路图。FIG. 1 is a circuit diagram of a power switching circuit provided by an embodiment of the present application.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下，所获得的所有其他实施例，都属于本申请保护范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of this application.
本申请的核心是提供一种电源切换电路，以便于解决当前的电源切换电路由于无法无缝切换，从而导致带来生产生活的损失。The core of this application is to provide a power switching circuit to solve the problem of the current power switching circuit being unable to switch seamlessly, thereby causing losses in production and life.
为了使本技术领域的人员更好地理解本申请方案，下面结合附图和具体实施方式对本申请作进一步的详细说明。In order to enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
图1为本申请实施例提供的一种电源切换电路的电路图，应用于中高 压直挂装置，如图1所示，该电源切换电路包括：继电器U1，高压二极管D1，低压二极管D2，高压电源1，低压电源2；Figure 1 is a circuit diagram of a power switching circuit provided by an embodiment of the present application, which is used in medium and high Pressure direct hanging device, as shown in Figure 1, the power switching circuit includes: relay U1, high-voltage diode D1, low-voltage diode D2, high-voltage power supply 1, low-voltage power supply 2;
继电器U1的线圈与中高压直挂装置的主控***3连接，继电器U1的第一开关端连接高压电源1，继电器U1的第二开关端连接低压电源2，用于根据主控***3的信号控制对线圈的供电，从而控制第一开关端和第二开关端的开闭以便于控制高压电源1以及低压电源2的开闭；The coil of relay U1 is connected to the main control system 3 of the medium and high-voltage direct-mounted device. The first switch end of the relay U1 is connected to the high-voltage power supply 1, and the second switch end of the relay U1 is connected to the low-voltage power supply 2, which is used according to the signal of the main control system 3. Control the power supply to the coil, thereby controlling the opening and closing of the first switch end and the second switch end to control the opening and closing of the high-voltage power supply 1 and the low-voltage power supply 2;
高压二极管D1的输入端连接高压电源1的输出端，输出端连接主控***3的电源供应端；The input end of the high-voltage diode D1 is connected to the output end of the high-voltage power supply 1, and the output end is connected to the power supply end of the main control system 3;
低压二极管D2的输入端连接低压电源2的输出端，输出端连接主控***3的电源供应端。The input terminal of the low-voltage diode D2 is connected to the output terminal of the low-voltage power supply 2 , and the output terminal is connected to the power supply terminal of the main control system 3 .
继电器(Relay)，也称电驿，是一种电子控制器件，它具有控制***(又称输入回路)和被控制***(又称输出回路)，通常应用于自动控制电路中，它实际上是用较小的电流去控制较大电流的一种“自动开关”。故在电路中起着自动调节、安全保护、转换电路等作用。需要说明的是，本实施例中对于继电器的具体类型不进行限定，如图1所示因为继电器U1是由线圈和触点组两部分组成的，所以继电器U1在电路图中的图形符号也包括两部分：一个长方框表示线圈；一组触点符号表示触点组合，在本实施例中第一开关端以及第二开关端均为继电器U1的触点，可以理解的是本实施例中的线圈对于第一开关端以及第二开关端的控制方式，可以采取两个触点响应方式不同的形式解决，也可以采用通过两个线圈分别对应两个开关端的方式解决，在此不进行具体限定。Relay, also called relay, is an electronic control device. It has a control system (also called input loop) and a controlled system (also called output loop). It is usually used in automatic control circuits. It is actually An "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the roles of automatic adjustment, safety protection, and conversion circuit in the circuit. It should be noted that the specific type of the relay is not limited in this embodiment. As shown in Figure 1, because the relay U1 is composed of a coil and a contact group, the graphical symbol of the relay U1 in the circuit diagram also includes two parts. Part: a rectangular box represents the coil; a set of contact symbols represents the contact combination. In this embodiment, the first switch terminal and the second switch terminal are both contacts of the relay U1. It can be understood that in this embodiment The coil's control method for the first switch end and the second switch end can be solved by using two contact points with different response modes, or it can be solved by using two coils corresponding to the two switch ends respectively, which is not specifically limited here.
需要说明的是，本实施例中对于继电器U1的连接方式不进行限定，即对于第一开关端以及第二开关端和继电器U1线圈的具体接线以及相应的电路连接方式不进行具体限定。It should be noted that in this embodiment, the connection method of relay U1 is not limited, that is, the specific wiring of the first switch terminal, the second switch terminal and the coil of relay U1 and the corresponding circuit connection method are not specifically limited.
在本实施例中，对于高压电源1，低压电源2以及对应的主控***3的具体类型以及装置不进行限定，视中高压直挂装置的不同，高压电源1以及低压电源2和对应的主控装置存在不同的优选取用，例如，因功耗限制，为充分保证电池利用率及效率，电池的荷电状态放电效率，***效率等，不建议供电电源直接由电池提供，在满足条件的前提下须由交流侧高 压(10/35kV)处取电；又或者在中高直挂式光伏发电***中，为了***的高可靠性，电源冗余部分，需要取自不同的电源供应，低压电源2取自光伏发电***DC-DC变换的最大功率点跟踪(Maximum Power Point Tracking，MPPT)环节后的母线电压，高压电源1取自高电位的并网侧。In this embodiment, the specific types and devices of the high-voltage power supply 1, the low-voltage power supply 2 and the corresponding main control system 3 are not limited. Depending on the medium and high-voltage direct-mounted devices, the high-voltage power supply 1, the low-voltage power supply 2 and the corresponding main control system 3 There are different preferences for the control device. For example, due to power consumption limitations, in order to fully ensure battery utilization and efficiency, battery state-of-charge discharge efficiency, system efficiency, etc., it is not recommended that the power supply be directly provided by the battery. When the conditions are met, Under the premise, it must be raised from the communication side The power is taken from the voltage (10/35kV); or in the medium and high direct-mounted photovoltaic power generation system, for the high reliability of the system, the power supply redundancy part needs to be taken from different power supplies, and the low-voltage power supply 2 is taken from the photovoltaic power generation system. The bus voltage after the Maximum Power Point Tracking (MPPT) link of DC-DC conversion, high-voltage power supply 1 is taken from the high-potential grid-connected side.
二极管，电子元件当中，一种具有两个电极的装置，只允许电流由单一方向流过，许多的使用是应用其整流的功能。而变容二极管则用来当作电子式的可调电容器。大部分二极管所具备的电流方向性我们通常称之为“整流(Rectifying)”功能。二极管最普遍的功能就是只允许电流由单一方向通过(称为顺向偏压)，反向时阻断(称为逆向偏压)。因此，二极管可以想成电子版的逆止阀。因此由于二极管的逆向阻断的能力，所以，在本方案中，可以起到相应的选择作用，即选择电压高的一端进行导通，所以可以理解的是，主控***3需要供电时控制继电器U1，从而闭合高压电源1和低压电源2相应的第一开关端以及第二开关端，通过开关端的闭合从而同时启动高压电源1以及低压电源2，由于高压二极管D1以及低压二极管D2的存在，所以此时导通接入主控***3电源的为电压较高的高压电源1，而电压较低的低压电源2被阻断，而当需要接入低压电源2时，只需要主控***3断开第一开关端即可，此时高压电源1的电压为0因此接入的是低压电源2，且本实施例中所采用的双二极管构造相比比较器而言，成本较低。Diode, among electronic components, is a device with two electrodes that only allows current to flow in one direction. Many uses are to apply its rectifying function. Varactors are used as electronically adjustable capacitors. The current directionality possessed by most diodes is usually called the "rectifying" function. The most common function of a diode is to only allow current to pass in one direction (called forward bias) and block it in the reverse direction (called reverse bias). Therefore, a diode can be thought of as an electronic version of a check valve. Therefore, due to the reverse blocking ability of the diode, in this solution, it can play a corresponding selection role, that is, select the end with a high voltage for conduction, so it is understandable that the main control system 3 controls the relay when it needs power U1, thereby closing the corresponding first switch terminal and the second switch terminal of the high-voltage power supply 1 and the low-voltage power supply 2. By closing the switch terminals, the high-voltage power supply 1 and the low-voltage power supply 2 are started simultaneously. Due to the existence of the high-voltage diode D1 and the low-voltage diode D2, At this time, the high-voltage power supply 1 with a higher voltage is connected to the power supply of the main control system 3, while the low-voltage power supply 2 with a lower voltage is blocked. When the low-voltage power supply 2 needs to be connected, only the main control system 3 needs to be disconnected. Just turn on the first switch terminal. At this time, the voltage of the high-voltage power supply 1 is 0, so the low-voltage power supply 2 is connected. Moreover, the dual-diode structure used in this embodiment has lower cost than the comparator.
本实施例所提供的电源切换电路，应用于中高压直挂装置，包括继电器U1，高压二极管D1，低压二极管D2，高压电源1，低压电源2，中高压直挂装置的主控***3连接继电器U1的控制端，从而控制高压电源1以及低压电源2的开闭，高压电源1以及低压电源2的输出分别连接高压二极管D1以及低压二极管D2的输入，且高压二极管D1与低压二极管D2的输出连接主控***3的电源供应端，从而在主控***3正常工作时，控制继电器U1同时让高压电源1与低压电源2运行，通过高压二极管D1以及低压二极管D2进行选择性比较输入，即电压大的电源对主控***3进行供电，因此是高压二极管D1对主控***3进行供电，当需要切换运行电源时，则主控***3控制高压电源1部分断开，从而由低压电源2进 行供电，实现电源的无缝切换，因此与现有技术相比，本申请由于在断开高压电源1时，低压电源2一直处于运行状态，因此在切换时，不会存在电源供应中断的问题，从而实现了电源的无缝切换。The power switching circuit provided in this embodiment is used in medium and high voltage direct-mounted devices, and includes relay U1, high-voltage diode D1, low-voltage diode D2, high-voltage power supply 1, low-voltage power supply 2, and the main control system 3 of the medium and high-voltage direct-mounted device connected to the relay. The control end of U1 controls the opening and closing of high-voltage power supply 1 and low-voltage power supply 2. The outputs of high-voltage power supply 1 and low-voltage power supply 2 are respectively connected to the inputs of high-voltage diode D1 and low-voltage diode D2, and the outputs of high-voltage diode D1 and low-voltage diode D2 are connected. The power supply end of the main control system 3, so that when the main control system 3 is working normally, the control relay U1 allows the high-voltage power supply 1 and the low-voltage power supply 2 to operate at the same time, and performs selective comparison input through the high-voltage diode D1 and the low-voltage diode D2, that is, the voltage is large The power supply supplies power to the main control system 3, so the high-voltage diode D1 supplies power to the main control system 3. When the operating power supply needs to be switched, the main control system 3 controls the high-voltage power supply 1 to be partially disconnected, so that the low-voltage power supply 2 Therefore, compared with the existing technology, in this application, when the high-voltage power supply 1 is disconnected, the low-voltage power supply 2 is always in operation, so there will be no problem of power supply interruption during switching. , thus achieving seamless power switching.
上述实施例中，对于继电器U1的具体类型未进行限定，在此提出优选方案，继电器U1的线圈包括第一线圈和第二线圈，第一线圈与第一开关端对应，用于控制第一开关端的开闭，第二线圈与第二开关端对应，用于控制第二开关端的开闭。In the above embodiment, the specific type of the relay U1 is not limited. Here, a preferred solution is proposed. The coil of the relay U1 includes a first coil and a second coil. The first coil corresponds to the first switch terminal and is used to control the first switch. The second coil corresponds to the second switch terminal and is used to control the opening and closing of the second switch terminal.
需要说明的是，继电器U1的控制的原理是通过线圈以及触点之间的电磁感应，即通过线圈的得电以及失电，从而控制触点的闭合，因此，在本实施例中采取了双线圈对应双触点的继电器U1形式，从而达到能精准控制第一触点以及第二触点，增加了电路的可控性。It should be noted that the control principle of relay U1 is to control the closing of the contacts through the electromagnetic induction between the coil and the contacts, that is, the coil is energized and de-energized, thereby controlling the closing of the contacts. Therefore, in this embodiment, a double The coil corresponds to the double-contact relay U1 form, so that the first contact and the second contact can be accurately controlled, which increases the controllability of the circuit.
考虑到需要保证主控***3电源的高可靠性，在此提出优选方案，该电路还包括：电压采样装置4，电压采样装置4的一端连接主控***3，另一端连接低压电源2。Considering the need to ensure the high reliability of the power supply of the main control system 3, an optimal solution is proposed here. The circuit also includes: a voltage sampling device 4. One end of the voltage sampling device 4 is connected to the main control system 3, and the other end is connected to the low-voltage power supply 2.
需要说明的是电压采样装置4即对于低压电源2的电压采样，可以理解的是，对于高压电源1一般由于电压过高，数量级较大，且由于高压供电时，对于电压精度要求不高，因此一般不对高压电源1进行采样，而对于低压电源2而言，针对于低压电源2进行采样，从而保证中高压直挂装置在低压状态下的电压的稳定性能，通过电压采样控制输入至主控***3中的实际电压，从而保证低压电压下主控***3的稳定工作。It should be noted that the voltage sampling device 4 is for the voltage sampling of the low-voltage power supply 2. It can be understood that the voltage of the high-voltage power supply 1 is generally too high and the magnitude is large, and because the voltage accuracy is not high when the high-voltage power supply is provided, the voltage accuracy is not high. Generally, high-voltage power supply 1 is not sampled, but for low-voltage power supply 2, low-voltage power supply 2 is sampled to ensure the stability of the voltage of the medium and high-voltage direct-mounted device in the low-voltage state, and is input to the main control system through voltage sampling control. 3, thereby ensuring the stable operation of the main control system 3 under low voltage.
上述实施例中未限定二极管的类型，在此提供优选方案，高压二极管D1与低压二极管D2均为肖特基二极管。The type of diode is not limited in the above embodiment, and a preferred solution is provided here. The high-voltage diode D1 and the low-voltage diode D2 are both Schottky diodes.
需要说明的是，由于中高压直挂装置的具体类型不同，所以高压电源1以及低压电源2所选取的类型也不同，因此输入至主控***3的电流可能为交流，也可能为直流，可以理解的是，通过将高压二极管D1以及低压二极管D2设置为肖特基二极管，从而在保证了高压二极管D1和低压二极管D2对电压的接入选择的情况下，还可以稳定输入至主控***3的电源，对输入的高压电流或低压电流进行调压或整流，从而保证了电路的稳定，维持了主控***3电源的稳定工作。 It should be noted that because the specific types of medium and high-voltage direct-mounted devices are different, the types of high-voltage power supply 1 and low-voltage power supply 2 are also different. Therefore, the current input to the main control system 3 may be AC or DC. It is understood that by setting the high-voltage diode D1 and the low-voltage diode D2 as Schottky diodes, it is possible to stably input the voltage to the main control system 3 while ensuring the voltage access selection of the high-voltage diode D1 and the low-voltage diode D2. The power supply regulates or rectifies the input high-voltage current or low-voltage current, thereby ensuring the stability of the circuit and maintaining the stable operation of the main control system 3 power supply.
上述实施例中，对于高压电源1未进行具体限定，在此提出优选方案，高压电源1为通过电流互感器获取得到的高位电源。In the above embodiment, the high-voltage power supply 1 is not specifically limited, and a preferred solution is proposed here. The high-voltage power supply 1 is a high-level power supply obtained through a current transformer.
电流互感器原理是依据电磁感应原理的。电流互感器是由闭合的铁心和绕组组成。它的一次侧绕组匝数很少，串在需要测量的电流的线路中，因此它经常有线路的全部电流流过，二次侧绕组匝数比较多，串接在测量仪表和保护回路中，电流互感器在工作时，它的二次侧回路始终是闭合的，因此测量仪表和保护回路串联线圈的阻抗很小，电流互感器的工作状态接近短路。电流互感器是把一次侧大电流转换成二次侧小电流来使用，二次侧不可开路。电流互感器的作用是可以把数值较大的一次电流通过一定的变比转换为数值较小的二次电流，用来进行保护、测量等用途，通过电流互感器，保证了电路中元件的安全，避免高压电源1直接接入电路所导致的电流过大烧坏元件。The principle of current transformer is based on the principle of electromagnetic induction. The current transformer is composed of a closed core and windings. Its primary side winding has a small number of turns and is connected in series with the circuit that needs to measure the current, so it often has all the current of the line flowing through it. Its secondary side winding has a relatively large number of turns and is connected in series with measuring instruments and protection circuits. When the current transformer is working, its secondary side loop is always closed, so the impedance of the series coil of the measuring instrument and the protection loop is very small, and the working state of the current transformer is close to a short circuit. Current transformers are used to convert large currents on the primary side into small currents on the secondary side. The secondary side cannot be open circuited. The function of the current transformer is to convert a larger primary current into a smaller secondary current through a certain transformation ratio, which is used for protection, measurement and other purposes. The current transformer ensures the safety of the components in the circuit. , to avoid excessive current from burning components caused by high-voltage power supply 1 being directly connected to the circuit.
上述实施例中，未对低压电源2进行限定，在此提出优选方案，低压电源2为直流UPS电源或交流UPS电源。In the above embodiment, the low-voltage power supply 2 is not limited, and a preferred solution is proposed here. The low-voltage power supply 2 is a DC UPS power supply or an AC UPS power supply.
不间断电源(Uninterruptible Power System，UPS)，是一种含有储能装置，以逆变器为主要组成部分的恒压恒频的不间断电源。主要用于给单台计算机、计算机网络***或其它电力电子设备提供不间断的电力供应。当市电输入正常时，UPS将市电稳压后供应给负载使用，此时的UPS就是一台交流市电稳压器，同时它还向机内电池充电；当市电中断(事故停电)时，UPS立即将机内电池的电能，通过逆变转换的方法向负载继续供应220V交流电，使负载维持正常工作并保护负载软、硬件不受损坏。UPS设备通常对电压过大和电压太低都提供保护。通过选用直流UPS电源或交流UPS电源从而维持电路在低压状态下的稳定工作，避免电压过低。Uninterruptible Power System (UPS) is a constant voltage and constant frequency uninterruptible power supply that contains an energy storage device and uses an inverter as its main component. It is mainly used to provide uninterrupted power supply to a single computer, computer network system or other power electronic equipment. When the mains power input is normal, the UPS stabilizes the mains power and supplies it to the load. At this time, the UPS is an AC mains voltage stabilizer, and it also charges the internal battery; when the mains power is interrupted (accidental power outage) When the UPS is running, the UPS will immediately continue to supply 220V AC power to the load through the inverter conversion method from the battery inside the machine, so that the load can maintain normal operation and protect the load software and hardware from damage. UPS equipment usually provides protection against both overvoltage and undervoltage. By selecting DC UPS power supply or AC UPS power supply, the stable operation of the circuit in a low-voltage state can be maintained to avoid excessively low voltage.
上述实施例中，对于中高压直挂装置的具体类型情况下的高压电源1选择以及低压电源2选择未进行具体限定，在此提出优选方案，中高压直挂装置为中高压直挂光伏发电装置，高压电源1为通过并网高电位获取的电源，低压电源2为取自光伏发电***DC-DC变换的MPPT环节后的母线电压。In the above embodiment, the selection of high-voltage power supply 1 and the selection of low-voltage power supply 2 in the specific type of medium and high-voltage direct-mounted devices are not specifically limited. Here, a preferred solution is proposed. The medium- and high-voltage direct-mounted devices are medium- and high-voltage direct-mounted photovoltaic power generation devices. , the high-voltage power supply 1 is the power obtained through the high potential of the grid connection, and the low-voltage power supply 2 is the bus voltage obtained from the MPPT link of the DC-DC conversion of the photovoltaic power generation system.
需要说明的是，光伏，是太阳能光伏发电***的简称，是一种利用太 阳电池半导体材料的光伏效应，将太阳光辐射能直接转换为电能的一种新型发电***。并网在电力行业是指发电机组的输电线路与输电网接通。"最大功率点跟踪"(Maximum Power Point Tracking，MPPT)，是传统太阳能充放电控制器的升级换代产品所采用的核心技术。It should be noted that photovoltaic is the abbreviation of solar photovoltaic power generation system. The photovoltaic effect of the anode semiconductor material is a new power generation system that directly converts solar radiation energy into electrical energy. Grid connection in the power industry refers to the connection of the transmission line of the generating unit to the transmission grid. "Maximum Power Point Tracking" (MPPT) is the core technology used in upgraded products of traditional solar charge and discharge controllers.
在本实施例中，限定了在选取的中高压直挂装置为光伏发电装置时，高压电源1以及低压电源2的选择，从而保证了在光伏***下，对于光伏发电电源的最大利用以及维持其电源供应的稳定性，从而实现光伏发电装置的自发电控制。In this embodiment, when the selected medium and high-voltage direct-mounted device is a photovoltaic power generation device, the selection of high-voltage power supply 1 and low-voltage power supply 2 is limited, thereby ensuring the maximum utilization of photovoltaic power generation and maintaining it under the photovoltaic system. The stability of power supply enables self-generation control of photovoltaic power generation devices.
考虑到在特殊情况下，主控***3未能及时对电源进行切换，还包括：报警装置，报警装置连接主控***3。Considering that under special circumstances, the main control system 3 fails to switch the power supply in time, it also includes: an alarm device, and the alarm device is connected to the main control system 3.
即本实施例中提供的报警装置及在检测到主控***3电源中的接入的电压与主控***3所需求的电压不符时，发出警报，在本实施例中，对于报警装置的具体类型不进行限定，可以理解的是，报警装置可以是蜂鸣器，警示灯等等。That is, the alarm device provided in this embodiment will issue an alarm when it detects that the voltage connected in the power supply of the main control system 3 does not match the voltage required by the main control system 3. In this embodiment, the specific details of the alarm device are The type is not limited. It is understood that the alarm device can be a buzzer, a warning light, etc.
本实施例中提供的优选方案，通过报警装置，从而提醒用户主控***3中供应电源存在问题，从而排除故障，避免安全事故的发生。The preferred solution provided in this embodiment uses an alarm device to remind the user that there is a problem with the power supply in the main control system 3, so as to troubleshoot and avoid safety accidents.
为解决上述问题，本申请还提供一种中高压直挂装置，包括上述的电源切换电路。In order to solve the above problems, this application also provides a medium and high voltage direct-mounted device, including the above-mentioned power switching circuit.
本申请所提供的中高压直挂装置与上述电源切换电路为包含关系，即中高压直挂装置中包含上述电源切换电路，因此具体实施例及有益效果见电源切换电路部分，在此不再赘述。The medium and high voltage direct-mounted device provided by this application has an inclusive relationship with the above-mentioned power switching circuit, that is, the medium and high-voltage direct-mounted device includes the above-mentioned power switching circuit. Therefore, the specific embodiments and beneficial effects can be found in the power switching circuit section, and will not be described again here. .
以上对本申请所提供的一种中高压直挂装置及其电源切换电路进行了详细介绍。说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以对本申请进行若干改进和修饰，这些改进和修饰也落入本申请权利要求的保护范围内。 The above is a detailed introduction to a medium and high voltage direct-mounted device and its power switching circuit provided by this application. Each embodiment in the specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For relevant details, please refer to the description in the method section. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
还需要说明的是，在本说明书中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。 It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or sequence between operations. Furthermore, the terms "comprises,""comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

Claims (9)

  1. 一种电源切换电路，其特征在于，应用于中高压直挂装置，包括：继电器，高压二极管，低压二极管，高压电源，低压电源；A power switching circuit, characterized in that it is used in medium and high voltage direct-mounted devices, including: a relay, a high-voltage diode, a low-voltage diode, a high-voltage power supply, and a low-voltage power supply;
    所述继电器的线圈与所述中高压直挂装置的主控***连接，所述继电器的第一开关端连接所述高压电源，所述继电器的第二开关端连接所述低压电源，用于根据所述主控***的信号控制对所述线圈的供电，从而控制所述第一开关端和所述第二开关端的开闭以便于控制所述高压电源以及所述低压电源的开闭；The coil of the relay is connected to the main control system of the medium and high-voltage direct-mounted device, the first switch end of the relay is connected to the high-voltage power supply, and the second switch end of the relay is connected to the low-voltage power supply. The signal of the main control system controls the power supply to the coil, thereby controlling the opening and closing of the first switch terminal and the second switch terminal to facilitate the control of the opening and closing of the high-voltage power supply and the low-voltage power supply;
    所述高压二极管的输入端连接所述高压电源的输出端，所述高压二极管的输出端连接所述主控***的电源供应端；The input end of the high-voltage diode is connected to the output end of the high-voltage power supply, and the output end of the high-voltage diode is connected to the power supply end of the main control system;
    所述低压二极管的输入端连接所述低压电源的输出端，所述低压二极管的输出端连接所述主控***的电源供应端。The input end of the low-voltage diode is connected to the output end of the low-voltage power supply, and the output end of the low-voltage diode is connected to the power supply end of the main control system.
  2. 根据权利要求1所述的电源切换电路，其特征在于，所述继电器的所述线圈包括第一线圈和第二线圈，所述第一线圈与所述第一开关端对应，用于控制所述第一开关端的开闭，所述第二线圈与所述第二开关端对应，用于控制所述第二开关端的开闭。The power switching circuit according to claim 1, characterized in that the coil of the relay includes a first coil and a second coil, the first coil corresponds to the first switch terminal and is used to control the The second coil corresponds to the opening and closing of the first switch terminal and is used to control the opening and closing of the second switch terminal.
  3. 根据权利要求1所述的电源切换电路，其特征在于，还包括：电压采样装置，所述电压采样装置的一端连接所述主控***，另一端连接所述低压电源。The power switching circuit according to claim 1, further comprising: a voltage sampling device, one end of the voltage sampling device is connected to the main control system, and the other end is connected to the low-voltage power supply.
  4. 根据权利要求3所述的电源切换电路，其特征在于，所述高压二极管与所述低压二极管均为肖特基二极管。The power switching circuit of claim 3, wherein the high-voltage diode and the low-voltage diode are both Schottky diodes.
  5. 根据权利要求1至4任意一项所述的电源切换电路，其特征在于，所述高压电源为通过电流互感器获取得到的高位电源。The power switching circuit according to any one of claims 1 to 4, characterized in that the high-voltage power supply is a high-voltage power supply obtained through a current transformer.
  6. 根据权利要求1至4任意一项所述的电源切换电路，其特征在于，所述低压电源为直流UPS电源或交流UPS电源。The power switching circuit according to any one of claims 1 to 4, characterized in that the low-voltage power supply is a DC UPS power supply or an AC UPS power supply.
  7. 根据权利要求1所述的电源切换电路，其特征在于，所述中高压直挂装置为中高压直挂光伏发电装置，所述高压电源为通过并网高电位获取的电源，所述低压电源为取自光伏发电***DC-DC变换的MPPT环节后的母线电压。 The power switching circuit according to claim 1, characterized in that the medium and high voltage direct-mounted device is a medium and high-voltage direct-mounted photovoltaic power generation device, the high-voltage power supply is a power source obtained through high-voltage grid connection, and the low-voltage power supply is It is taken from the bus voltage after the MPPT link of the DC-DC conversion of the photovoltaic power generation system.
  8. 根据权利要求1所述的电源切换电路，其特征在于，还包括：报警装置，所述报警装置连接所述主控***。The power switching circuit according to claim 1, further comprising: an alarm device, the alarm device being connected to the main control system.
  9. 一种中高压直挂装置，其特征在于，包括权利要求1至8任意一项所述的电源切换电路。 A medium and high voltage direct-mounted device, characterized by comprising the power switching circuit described in any one of claims 1 to 8.
PCT/CN2023/097954 2022-05-06 2023-06-02 Medium-high voltage suspended apparatus and power supply switching circuit thereof WO2023213330A1 (en)

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CN202221069695.5U CN217406243U (en) 2022-05-06 2022-05-06 Middle-high voltage direct-hanging device and power supply switching circuit thereof
CN202210485359.7A CN114844196A (en) 2022-05-06 2022-05-06 Middle-high voltage direct-hanging device and power supply switching circuit thereof
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5894413A (en) * 1997-01-28 1999-04-13 Sony Corporation Redundant power supply switchover circuit
CN204967410U (en) * 2015-07-29 2016-01-13 上海超硅半导体有限公司 Zero -power direct current UPS switched systems
CN110535228A (en) * 2019-08-28 2019-12-03 安徽德孚转向***股份有限公司 A kind of power supply system of automobile EPS
CN213484580U (en) * 2020-11-26 2021-06-18 深圳市锐深科技有限公司 Double-circuit power supply low-power consumption automatic switching circuit
CN114325370A (en) * 2021-12-17 2022-04-12 北京市科通电子继电器总厂有限公司 Method and circuit for realizing load condition test by dual power supply time-sharing multiplexing
CN114844196A (en) * 2022-05-06 2022-08-02 海南金盘智能科技股份有限公司 Middle-high voltage direct-hanging device and power supply switching circuit thereof
CN217406243U (en) * 2022-05-06 2022-09-09 海南金盘智能科技股份有限公司 Middle-high voltage direct-hanging device and power supply switching circuit thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5894413A (en) * 1997-01-28 1999-04-13 Sony Corporation Redundant power supply switchover circuit
CN204967410U (en) * 2015-07-29 2016-01-13 上海超硅半导体有限公司 Zero -power direct current UPS switched systems
CN110535228A (en) * 2019-08-28 2019-12-03 安徽德孚转向***股份有限公司 A kind of power supply system of automobile EPS
CN213484580U (en) * 2020-11-26 2021-06-18 深圳市锐深科技有限公司 Double-circuit power supply low-power consumption automatic switching circuit
CN114325370A (en) * 2021-12-17 2022-04-12 北京市科通电子继电器总厂有限公司 Method and circuit for realizing load condition test by dual power supply time-sharing multiplexing
CN114844196A (en) * 2022-05-06 2022-08-02 海南金盘智能科技股份有限公司 Middle-high voltage direct-hanging device and power supply switching circuit thereof
CN217406243U (en) * 2022-05-06 2022-09-09 海南金盘智能科技股份有限公司 Middle-high voltage direct-hanging device and power supply switching circuit thereof

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