CN109450080A - A kind of automatic redundancy zero propagation switching system of two dc power supply and method - Google Patents

Abstract

The invention discloses a kind of automatic redundancy zero propagation switching system of two dc power supply and methods.System includes bus, and the bus includes control bus anode, closing bus bar anode and bus negative terminal, and the bus is divided into the first bus section, busbar section and the second bus section, busbar section, and each bus section, busbar section is respectively corresponded equipped with combined floodgate output module, control output module and dropping equipment；Each bus section, busbar section has also respectively corresponded one group of AC/DC conversion module and battery, and the outlet line of the anode of the DC output end of the AC/DC conversion module is equipped with diode, and the conducting direction of the diode is by AC/DC conversion module to bus section, busbar section；Also it is connected by busbar breaker between two bus section, busbar sections.The present invention realizes automatic switchover and zero time delay, and circulation situation when battery parallel connection is not present, and method is simple, safe and reliable.

Description

A kind of automatic redundancy zero propagation switching system of two dc power supply and method

Technical field

The present invention relates to a kind of power trains to unify the switching of the two dc power supply in the DC power supply system of secondary deviceSystem further relates to a kind of switching method of two dc power supply.

Background technique

Protective device, automatic control device, signalling arrangement, monitoring device, accident in electrical primary and secondary device are shoneBright, emergency power supply, breaking-closing operating of breaker etc., requiring offer DC power supply could work normally.DC power supply is oneA independent power-supply system, it is not influenced by generator, station service and system operation mode, and is stopped in external ac power sourceIn the case where electricity, continued to provide DC power supply by backup power supply (battery).

Current medium and small project project, the DC power system of an electrical secondary device are using one group of battery mostlyDC power system.Such system is constituted simply, low in cost, but any one functional module breaks down, and hasIt is out of service to may cause whole system, reliability is lower.Such system can be only applied to the middle-size and small-size of second level and three stage loadsIn engineering project, even if interruption of power supply, also it is unlikely to cause great economy or casualties.

Since the reliability of traditional single set DC power system is lower, in some important loads such as first order load,It generally requires using the higher DC power system of reliability.The major way for improving reliability is to provide redundant configuration, when itIn any set of system break down when, be quickly switched into another set of system to restore electricity, reliability significantly improves.ButHandoff functionality is automatically or manually controlled by switch manual control or electromagnetic type relay, both switching modes are all depositedThe case where system power supply interrupts.If encountering the system failure in handoff procedure, protective relaying device is by tripping, it will occursThe major accidents such as system failure expansion, equipment burnout.Even and relay automatically switch, the break period also have 30ms withOn, manual mode switching time is generally second grade or longer.In certain extreme cases, some engineering operations personnel are in order to guaranteeUninterrupted power supply can first close the network interconnecting circuit between bus, then disconnect the switch of failure side, and it is short to there are two group storage batteries at this timeThe situation of time parallel connection will form very big circulation, easily battery caused to overheat because the voltage of two group storage batteries is differentThe even danger of explosion.Therefore, DC power system in the prior art can not meet important negative under the premise that security is guaranteedRequirement of the lotus to power interruption time.

Summary of the invention

The invention proposes a kind of automatic redundancy zero propagation switching system of two dc power supply and method, its object is to:Under the premise of guaranteeing safety, DC power supply switching is avoided to cause power failure.

Technical solution of the present invention is as follows:

A kind of automatic redundancy zero propagation switching system of two dc power supply, including bus, the bus include control bus anode, closeLock bus anode and bus negative terminal, the bus are divided into the first bus section, busbar section and the second bus section, busbar section, and each bus section, busbar section, which respectively corresponds, to be equipped withCombined floodgate output module, control output module and dropping equipment, the control bus of bus section, busbar section where the dropping equipment is connected to is justBetween end and closing bus bar anode, the combined floodgate output module is connected with the closing bus bar anode of place bus section, busbar section and bus negative terminalIt connects, the control output module is connected with the control bus anode of place bus section, busbar section and bus negative terminal；

Each bus section, busbar section has also respectively corresponded one group of AC/DC conversion module and battery, and the AC/DC conversion module will be for that will exchangeElectricity is converted to direct current, and the closing bus bar of the positive and corresponding bus section, busbar section of the DC output end of the AC/DC conversion module is justEnd is connected, cathode is connected with the bus negative terminal of corresponding bus section, busbar section, and the AC/DC conversion module is connected to the line of bus section, busbar sectionRoad is equipped with the first breaker, and the anode of the DC output end of the AC/DC conversion module is connected to the route of the first breakerOn be additionally provided with diode, the conducting direction of the diode is by AC/DC conversion module to bus section, busbar section；The battery it is positive and negativePole is correspondingly connected with by the positive and negative anodes of the second breaker and the DC output end of the AC/DC conversion module；

The closing bus bar anode and bus negative terminal of the closing bus bar anode and bus negative terminal of first bus section, busbar section and the second bus section, busbar section itBetween also pass through the corresponding connection of busbar breaker.

As a further improvement of the present invention: the AC/DC conversion module is also correspondingly provided with exchange switching device, describedThe ac input end of AC/DC conversion module is connected with switching device output end is exchanged, and the exchange switching device has firstAc input end and the second ac input end.

As a further improvement of the present invention: further including the insulating monitoring module of ground connection, insulating monitoring module sideIt is connected with the control bus anode of the first bus section, busbar section and closing bus bar anode, the control bus of the other side and the second bus section, busbar sectionAnode and closing bus bar anode are connected.

As a further improvement of the present invention: corresponding each bus section, busbar section, further include be connected to AC/DC conversion module direct current it is defeatedFirst voltage detection device between the positive electrode and negative electrode of outlet, and be mounted on the DC output end of AC/DC conversion moduleFirst current detection means of negative output line road.

As a further improvement of the present invention: corresponding each bus section, busbar section, further include be connected to battery positive electrode and negative electrode itBetween second voltage detection device, and be mounted on the second current detection means of the negative output line road of battery.

As a further improvement of the present invention: the busbar breaker includes that concatenated first busbar breaker and second are femaleJoin breaker.

Switching method based on the above-mentioned automatic redundancy zero propagation switching system of two dc power supply: two groups of AC/DC of setting becomeThe pressure difference for changing the mold the output voltage of block is 1 to 2V；It is the first bus section, busbar section and the with the AC/DC conversion module compared with high output voltageTwo bus section, busbar sections provide direct current, and charge for corresponding battery, are with the AC/DC conversion module compared with low output voltageCorresponding battery charging；When having the side compared with high output voltage to break down, it is by other side AC/DC conversion moduleBussed supply.

Further improvement as the above method: busbar breaker is disconnected, and two groups of bus section, busbar sections are respectively as direct current supplySystem uses.

Compared with the existing technology, the present invention has the positive effect that: (1) bus is divided into two sections by the present invention, Mei GeduanIt falls and respectively corresponds one group of DC power supply, and power-type diode is set in DC output end, then by busbar breaker by two groupsCharging module is in parallel, and when work, only one group of power supply powering load, another group of power supply is in stand-by heat shape in two groups of power supplysState, when wherein one group of power supply decompression, another group of powering load that can contribute automatically realizes automatic switchover and zero time delay, andAnd circulation situation when battery parallel connection is not present, method is simple, safe and reliable；(2) due to being provided with power-type diode,Circulation can not be formed between two group storage batteries, improve the safety coefficient of system；(3) this programme method of operation is flexible, closes motherWhen breaker, can be used as the use of redundancy-type power-supply system, after disconnecting busbar breaker, can be used as two sets it is completely self-contained straightPower supply system is flowed to use.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of switching system of the present invention.

Specific embodiment

The technical solution that the invention will now be described in detail with reference to the accompanying drawings:

Such as Fig. 1, a kind of automatic redundancy zero propagation switching system of two dc power supply, including bus, the bus include control busAnode, closing bus bar anode and bus negative terminal.

The bus is divided into the first bus section, busbar section 100 and the second bus section, busbar section 200, and each bus section, busbar section, which respectively corresponds, is equipped with output of closing a floodgateModule 1, control output module 2 and dropping equipment 3, the control bus anode of bus section, busbar section where the dropping equipment 3 is connected toBetween closing bus bar anode, the combined floodgate output module 1 is connected with the closing bus bar anode of place bus section, busbar section and bus negative terminal,The control output module 2 is connected with the control bus anode of place bus section, busbar section and bus negative terminal.

Each bus section, busbar section has also respectively corresponded one group of AC/DC conversion module 4 and battery 5, and the AC/DC conversion module 4 is usedIn converting alternating current to direct current, the conjunction of the anode and corresponding bus section, busbar section of the DC output end of the AC/DC conversion module 4Lock bus anode is connected, cathode is connected with the bus negative terminal of corresponding bus section, busbar section, and the AC/DC conversion module 4 is connected toThe route of bus section, busbar section is equipped with the first breaker 7, and the anode of the DC output end of the AC/DC conversion module 4 is connected to firstBe additionally provided with power-type diode 6 on the route of breaker 7, the conducting direction of the diode 6 be by AC/DC conversion module 4 toBus section, busbar section；The positive and negative anodes of the battery 5 by the DC output end of the second breaker 8 and the AC/DC conversion module 4 justCathode is correspondingly connected with.

The type selecting of power-type diode 6 needs the capacity according to system and considers engineering coefficient appropriate to select electric currentWith repetitive peak reverse voltage value, it is also necessary to calculate the fever feelings of power-type diode 6 according to the size of rated operational currentCondition decides whether to install radiator additional.

Further, the AC/DC conversion module 4 is also correspondingly provided with exchange switching device 9, the AC/DC conversion module 4Ac input end be connected with 9 output end of switching device is exchanged, the exchange switching device 9 have the first ac input end andSecond ac input end can connect two groups of AC power sources, can automatically switch when AC power failure, it is ensured that DC power supplyReliable power supply.

The closing bus bar anode and bus negative terminal of first bus section, busbar section 100 and the closing bus bar anode of the second bus section, busbar section 200 andAlso by the corresponding connection of busbar breaker between bus negative terminal, to protect bus；Preferably, since dc circuit breaker has directionProperty, therefore it is provided with two busbar breakers of QFL1 and QFL2 as shown in Figure 1.

System is additionally provided with monitoring module, and for carrying out system administration, major function is the long-range monitoring of battery management and backstage,And data acquisition is carried out to junior's smart machine and is shown.

It is additionally provided with distribution monitor module in power supply system, analog quantitys various in the AC DC in system, switching value are believedIt number acquires and handles, while providing sound-light alarm.

System is additionally provided with battery inspection device 17, monomer battery voltage monitoring and alarm is supported, to battery terminal voltage, electricityStream, temperature and other parameters do real time on-line monitoring.

System further includes the insulating monitoring module 10 of ground connection, 10 side of insulating monitoring module and the first bus section, busbar section 100Control bus anode and closing bus bar anode be connected, the control bus anode of the other side and the second bus section, busbar section 200 andClosing bus bar anode is connected.Insulating monitoring module 10 is used to monitor the insulation situation of system busbar and branch, generates alarm letterNumber and reported data arrive monitoring module, monitoring module display data details.

Corresponding each bus section, busbar section, further includes being connected between the positive electrode and negative electrode of the DC output end of AC/DC conversion module 4First voltage detection device 11, and be mounted on the DC output end of AC/DC conversion module 4 negative output line road firstCurrent detection means 12, the two are used to monitor the voltage and current of direct current output.

Corresponding each bus section, busbar section, further includes the second voltage detection device 13 being connected between the positive electrode and negative electrode of battery 5,And it is mounted on the second current detection means 14 of the negative output line road of battery 5, the two is for monitoring 5 the two poles of the earth of batteryVoltage and charging and discharging currents.

In application, considering the presence of 6 junction voltage of power-type diode, the output electricity of two groups of AC/DC conversion modules 4 is setThe pressure difference of pressure is 1 to 2V；It is the first bus section, busbar section 100 and the second bus section, busbar section with the AC/DC conversion module 4 compared with high output voltage200 provide direct current, and charge for corresponding battery 5, and it is right for having compared with the AC/DC conversion module 4 of low output voltageThe battery 5 answered charges；It is mother by other side AC/DC conversion module 4 when having the side compared with high output voltage to break downLine power supply.

Busbar breaker is disconnected, two groups of bus section, busbar sections are used respectively as DC power-supply system.

Claims (8)

Translated fromChinese

1.一种双直流电源自动冗余零延时切换系统，包括母线，所述母线包括控制母线正端、合闸母线正端和母线负端，其特征在于：所述母线分为第一母线段（100）和第二母线段（200），各母线段分别对应设有合闸输出模块（1）、控制输出模块（2）和降压装置（3），所述降压装置（3）连接在所在母线段的控制母线正端与合闸母线正端之间，所述合闸输出模块（1）与所在母线段的合闸母线正端及母线负端相连接，所述控制输出模块（2）与所在母线段的控制母线正端及母线负端相连接；A dual DC power supply automatic redundant zero delay switching system, comprising a bus bar, the bus bar comprising a control bus bar positive end, a closing bus bar positive end and a bus bar negative end, wherein the bus bar is divided into a first bus bar a segment (100) and a second bus segment (200), each of the busbar segments respectively corresponding to a closing output module (1), a control output module (2) and a pressure reducing device (3), the pressure reducing device (3) Connected between the positive end of the control busbar and the positive end of the closing busbar of the busbar section, the closing output module (1) is connected with the positive end of the closing busbar of the busbar section and the negative end of the busbar, the control output module (2) connected to the positive terminal of the control busbar and the negative terminal of the busbar of the busbar section;各母线段还分别对应有一组AC/DC变换模块（4）和蓄电池（5），所述AC/DC变换模块（4）用于将交流电转换为直流电，所述AC/DC变换模块（4）的直流输出端的正极与所对应母线段的合闸母线正端相连接、负极与所对应母线段的母线负端相连接，所述AC/DC变换模块（4）连接至母线段的线路上设有第一断路器（7），所述AC/DC变换模块（4）的直流输出端的正极连接至第一断路器（7）的线路上还设有二极管（6），所述二极管（6）的导通方向为由AC/DC变换模块（4）至母线段；所述蓄电池（5）的正负极通过第二断路器（8）与所述AC/DC变换模块（4）的直流输出端的正负极对应连接；Each busbar segment further has a set of AC/DC conversion module (4) and a battery (5), wherein the AC/DC conversion module (4) is used for converting alternating current into direct current, and the AC/DC conversion module (4) The positive pole of the DC output end is connected with the positive end of the closing busbar of the corresponding busbar section, the negative pole is connected with the negative end of the busbar of the corresponding busbar section, and the AC/DC conversion module (4) is connected to the line of the busbar section. There is a first circuit breaker (7), and a diode (6) is further disposed on the line connecting the positive pole of the DC output end of the AC/DC conversion module (4) to the first circuit breaker (7), the diode (6) The conduction direction is from the AC/DC conversion module (4) to the busbar segment; the positive and negative poles of the battery (5) pass through the second circuit breaker (8) and the DC output of the AC/DC conversion module (4) The positive and negative poles of the end are correspondingly connected;第一母线段（100）的合闸母线正端及母线负端与第二母线段（200）的合闸母线正端及母线负端之间还通过母联断路器相对应连接。The positive end of the closing busbar of the first busbar section (100) and the negative end of the busbar are connected with the positive end of the closing busbar of the second busbar section (200) and the negative end of the busbar through a female coupling circuit breaker.2.如权利要求1所述的双直流电源自动冗余零延时切换系统，其特征在于：所述AC/DC变换模块（4）还对应设有交流切换装置（9），所述AC/DC变换模块（4）的交流输入端与交流切换装置（9）输出端相连接，所述交流切换装置（9）具有第一交流输入端和第二交流输入端。The dual DC power supply automatic redundant zero-delay switching system according to claim 1, wherein the AC/DC conversion module (4) is further provided with an AC switching device (9), the AC/ The AC input terminal of the DC conversion module (4) is connected to the output of the AC switching device (9), and the AC switching device (9) has a first AC input terminal and a second AC input terminal.3.如权利要求1所述的双直流电源自动冗余零延时切换系统，其特征在于：还包括接地的绝缘监测模块（10），所述绝缘监测模块（10）一侧与第一母线段（100）的控制母线正端以及合闸母线正端相连接，另一侧与第二母线段（200）的控制母线正端以及合闸母线正端相连接。3 . The dual DC power supply automatic redundant zero delay switching system of claim 1 , further comprising: a grounded insulation monitoring module (10), the insulation monitoring module (10) side and the first bus bar. The positive terminal of the control busbar of the segment (100) and the positive terminal of the closing busbar are connected, and the other side is connected with the positive terminal of the control busbar of the second busbar segment (200) and the positive terminal of the closing busbar.4.如权利要求1所述的双直流电源自动冗余零延时切换系统，其特征在于：对应各母线段，还包括连接于AC/DC变换模块（4）的直流输出端的正极与负极之间的第一电压检测装置（11），以及安装在AC/DC变换模块（4）的直流输出端的负极输出线路上的第一电流检测装置（12）。4 . The dual DC power supply automatic redundant zero delay switching system according to claim 1 , further comprising: a positive pole and a negative pole connected to the DC output end of the AC/DC converter module ( 4 ) corresponding to each bus line segment. A first voltage detecting device (11), and a first current detecting device (12) mounted on the negative output line of the DC output terminal of the AC/DC converting module (4).5.如权利要求1所述的双直流电源自动冗余零延时切换系统，其特征在于：对应各母线段，还包括连接于蓄电池（5）的正极与负极之间的第二电压检测装置（13），以及安装在蓄电池（5）的负极输出线路上的第二电流检测装置（14）。5 . The dual DC power supply automatic redundant zero delay switching system according to claim 1 , further comprising: a second voltage detecting device connected between the positive pole and the negative pole of the battery ( 5 ) corresponding to each bus bar segment; (13), and a second current detecting device (14) mounted on the negative output line of the battery (5).6.如权利要求1至5任一所述的双直流电源自动冗余零延时切换系统，其特征在于：所述母联断路器包括串联的第一母联断路器（15）和第二母联断路器（16）。The dual DC power supply automatic redundant zero-delay switching system according to any one of claims 1 to 5, wherein the bus-coupled circuit breaker comprises a first bus-connected circuit breaker (15) and a second connected in series. Busbar breaker (16).7.基于如权利要求1所述的双直流电源自动冗余零延时切换系统的切换方法，其特征在于：设置两组AC/DC变换模块（4）的输出电压的压差为1至2V；具有较高输出电压的AC/DC变换模块（4）为第一母线段（100）和第二母线段（200）提供直流电，并为所对应的蓄电池（5）充电，具有较低输出电压的AC/DC变换模块（4）为所对应的蓄电池（5）充电；当具有较高输出电压的一侧出现故障时，由另一侧AC/DC变换模块（4）为母线供电。7. The method for switching a dual DC power supply automatic redundant zero-delay switching system according to claim 1, wherein the voltage difference of the output voltages of the two sets of AC/DC conversion modules (4) is set to 1 to 2V. The AC/DC conversion module (4) having a higher output voltage supplies DC power to the first bus segment (100) and the second bus segment (200), and charges the corresponding battery (5) with a lower output voltage. The AC/DC conversion module (4) charges the corresponding battery (5); when the side with the higher output voltage fails, the other side AC/DC conversion module (4) supplies power to the bus.8.如权利要求7所述的切换方法，其特征在于：将母联断路器断开，两组母线段分别作为直流供电系统使用。8. The switching method according to claim 7, wherein the bus-connected circuit breaker is disconnected, and the two busbar segments are respectively used as a DC power supply system.