CN110492454A - Silicon chain open-circuit-protection system in DC power system - Google Patents
Silicon chain open-circuit-protection system in DC power system Download PDFInfo
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- CN110492454A CN110492454A CN201910919790.6A CN201910919790A CN110492454A CN 110492454 A CN110492454 A CN 110492454A CN 201910919790 A CN201910919790 A CN 201910919790A CN 110492454 A CN110492454 A CN 110492454A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for DC systems
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Abstract
本发明提供的一种直流电源系统中的硅链开路保护系统，所述硅链由多个硅链单元串联形成，包括控制器、开路检测控制电路、继电器以及继电器控制电路；所述继电器的个数与硅链单元的个数相同，所述继电器的开关与对应的硅链单元并联，所述继电器控制电路用于控制继电器的开关的闭合与断开，所述继电器控制电路的第一控制端与控制器的控制输出端连接，继电器控制电路的第二控制端与开路检测控制电路的控制输出端连接，所述继电器控制的第三控制端与控制器的控制输出端连接，所述开路检测控制电路的控制输出端还与控制器的输入端连接，通过本发明，能够准确检测硅链的开路状态，并在开路出现时及时执行相应的开路保护，从而有效确保直流电源系统的稳定运行，避免安全事故的发生。
The present invention provides a silicon chain open circuit protection system in a DC power supply system. The silicon chain is formed by a plurality of silicon chain units in series, including a controller, an open circuit detection control circuit, a relay and a relay control circuit; The number is the same as the number of silicon chain units, the switch of the relay is connected in parallel with the corresponding silicon chain unit, the relay control circuit is used to control the closing and opening of the switch of the relay, the first control terminal of the relay control circuit It is connected with the control output end of the controller, the second control end of the relay control circuit is connected with the control output end of the open circuit detection control circuit, the third control end of the relay control is connected with the control output end of the controller, and the open circuit detection The control output terminal of the control circuit is also connected to the input terminal of the controller. Through the present invention, the open circuit state of the silicon chain can be accurately detected, and the corresponding open circuit protection is executed in time when the open circuit occurs, thereby effectively ensuring the stable operation of the DC power supply system. Avoid safety accidents.
Description
技术领域technical field
本发明涉及一种保护系统，尤其涉及一种直流电源系统中的硅链开路保护系统。The invention relates to a protection system, in particular to a silicon chain open circuit protection system in a DC power supply system.
背景技术Background technique
直流电源系统能满足正常运行和事故状态下的继电保护、自动化装置、断路器分合闸、控制、信号、事故照明、不间断电源UPS等需要；硅链是直流电源系统中极为重要的部件，用于调节充电母线HM和控制母线KM之间的电压，确保断路器不会勿动，硅链在工作过程中不允许开路，如果出现开路，则容易引起严重的安全事故，现有技术中，还没有一种有效的手段对硅链的开路进行准确检测以及及时执行开路保护。The DC power supply system can meet the needs of relay protection, automation devices, circuit breaker opening and closing, control, signal, accident lighting, uninterruptible power supply UPS, etc. under normal operation and accident status; the silicon chain is an extremely important component in the DC power supply system , used to adjust the voltage between the charging bus HM and the control bus KM, to ensure that the circuit breaker will not be inactive, and the silicon chain is not allowed to open in the working process. If there is an open circuit, it will easily cause serious safety accidents. In the prior art However, there is no effective means to accurately detect the open circuit of the silicon chain and perform open circuit protection in time.
发明内容Contents of the invention
有鉴于此，本发明的目的是提供一种直流电源系统中的硅链开路保护系统，能够准确检测硅链的开路状态，并在开路出现时及时执行相应的开路保护，从而有效确保直流电源系统的稳定运行，避免安全事故的发生。In view of this, the object of the present invention is to provide a silicon chain open-circuit protection system in a DC power supply system, which can accurately detect the open-circuit state of the silicon chain, and perform corresponding open-circuit protection in time when an open circuit occurs, thereby effectively ensuring the DC power supply system. stable operation to avoid safety accidents.
本发明提供的一种直流电源系统中的硅链开路保护系统，所述硅链由多个硅链单元串联形成，包括控制器、开路检测控制电路、继电器以及继电器控制电路；The present invention provides a silicon chain open circuit protection system in a DC power supply system, the silicon chain is formed by a plurality of silicon chain units connected in series, including a controller, an open circuit detection control circuit, a relay and a relay control circuit;
所述继电器的个数与硅链单元的个数相同，所述继电器的开关与对应的硅链单元并联，所述继电器控制电路用于控制继电器的开关的闭合与断开，所述继电器控制电路的第一控制端与控制器的控制输出端连接，继电器控制电路的第二控制端与开路检测控制电路的控制输出端连接，所述继电器控制的第三控制端与控制器的控制输出端连接，所述开路检测控制电路的控制输出端还与控制器的输入端连接。The number of the relays is the same as that of the silicon chain units, the switches of the relays are connected in parallel with the corresponding silicon chain units, the relay control circuit is used to control the closing and opening of the switches of the relays, and the relay control circuit The first control end of the relay control circuit is connected to the control output end of the controller, the second control end of the relay control circuit is connected to the control output end of the open circuit detection control circuit, and the third control end of the relay control is connected to the control output end of the controller , the control output end of the open circuit detection control circuit is also connected to the input end of the controller.
进一步，所述继电器控制电路包括三极管Q1、电阻R1、二极管D2、二极管D1、电阻R2、电阻R3、电阻R4、三极管Q2、三极管Q3以及可控硅SCR1；Further, the relay control circuit includes a transistor Q1, a resistor R1, a diode D2, a diode D1, a resistor R2, a resistor R3, a resistor R4, a transistor Q2, a transistor Q3 and a silicon controlled rectifier SCR1;
所述电阻R1的一端连接于直流电源系统的充电母线，电阻R1的另一端与通过继电器的线圈与三极管Q1的集电极连接，三极管Q1的发射极接地，三极管Q1的基极与二极管D2的负极连接，二极管D2的正极作为继电器控制电路的第一控制端与控制器的控制输出端连接，三极管Q1的基极还与可控硅SCR1的负极连接，可控硅SCR1的正极通过电阻R5与三极管Q2的集电极连接，可控硅SCR1的控制极作为继电器控制电路的第二控制端；One end of the resistor R1 is connected to the charging bus of the DC power supply system, the other end of the resistor R1 is connected to the collector of the transistor Q1 through the coil of the relay, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to the cathode of the diode D2 connection, the anode of the diode D2 is connected to the control output end of the controller as the first control terminal of the relay control circuit, the base of the triode Q1 is also connected to the negative pole of the thyristor SCR1, and the positive pole of the thyristor SCR1 is connected to the triode through the resistor R5 The collector of Q2 is connected, and the control pole of the thyristor SCR1 is used as the second control terminal of the relay control circuit;
三极管Q2的发射极通过电阻R2接电源VCC，电阻R3的一端连接于电源VCC，电阻R3的另一端通过电阻R4与三极管Q3的集电极连接，电阻R3和电阻R4之间的公共连接点与三极管Q2的基极连接，三极管Q3的发射极接地，三极管Q3的基极与二极管D1的负极连接，二极管D1的正极作为继电器控制电路的第三控制端；The emitter of the transistor Q2 is connected to the power supply VCC through the resistor R2, one end of the resistor R3 is connected to the power supply VCC, the other end of the resistor R3 is connected to the collector of the transistor Q3 through the resistor R4, and the common connection point between the resistor R3 and the resistor R4 is connected to the transistor The base of Q2 is connected, the emitter of the transistor Q3 is grounded, the base of the transistor Q3 is connected to the cathode of the diode D1, and the anode of the diode D1 is used as the third control terminal of the relay control circuit;
其中，三极管Q2为P型三极管。Wherein, the transistor Q2 is a P-type transistor.
进一步，所述开路检测电路包括直流电流互感器ZCT、电流采集电路、第一比较电路、电压采集电路、第二比较电路以及输出控制电路；Further, the open circuit detection circuit includes a DC current transformer ZCT, a current acquisition circuit, a first comparison circuit, a voltage acquisition circuit, a second comparison circuit and an output control circuit;
所述直流电流互感器ZCT设置于硅链的输入侧，电流采集电路的输入端与直流电流互感器ZCT的输出端连接，电流采集电路的输出端与第一比较电路的输入端连接，电压采集电路的输入端设置于硅链的输出端，电压采集电路的输出端与第二比较电路的输入端连接，第一比较电路和第二比较电路的输出端分别与输出控制电路的第一控制输入端和第二控制输入端连接，输出控制电路的输出端分别与可控硅SCR1的控制极以及控制器的输入端连接。The DC current transformer ZCT is arranged on the input side of the silicon chain, the input end of the current acquisition circuit is connected with the output end of the DC current transformer ZCT, the output end of the current acquisition circuit is connected with the input end of the first comparison circuit, and the voltage acquisition circuit The input end of the circuit is set at the output end of the silicon chain, the output end of the voltage acquisition circuit is connected to the input end of the second comparison circuit, and the output ends of the first comparison circuit and the second comparison circuit are respectively connected to the first control input of the output control circuit. The terminal is connected to the second control input terminal, and the output terminal of the output control circuit is respectively connected to the control electrode of the thyristor SCR1 and the input terminal of the controller.
进一步，所述电流采集电路包括电阻R6和电阻R7，电阻R6的一端与直流电流互感器ZCT的输出端连接，电阻R6的另一端通过电阻R7接地，电阻R6和电阻R7的公共连接点作为电流采集电路的输出端与第一比较电路的输入端连接。Further, the current acquisition circuit includes a resistor R6 and a resistor R7, one end of the resistor R6 is connected to the output end of the DC current transformer ZCT, the other end of the resistor R6 is grounded through the resistor R7, and the common connection point of the resistor R6 and the resistor R7 is used as a current The output end of the acquisition circuit is connected with the input end of the first comparison circuit.
进一步，所述第一比较电路包括运放U1、电阻R8和可调电阻R9；Further, the first comparison circuit includes an operational amplifier U1, a resistor R8 and an adjustable resistor R9;
运放U1的反相端作为第一比较电路的输入端，运放U1的同相端通过电阻R8接地，运放U1的同相端通过可调电阻R9与电源VCC连接，运放U1的输出端与输出控制电路的第一控制输入端连接。The inverting terminal of the operational amplifier U1 is used as the input terminal of the first comparison circuit, the non-inverting terminal of the operational amplifier U1 is grounded through the resistor R8, the non-inverting terminal of the operational amplifier U1 is connected to the power supply VCC through the adjustable resistor R9, and the output terminal of the operational amplifier U1 is connected to the The first control input of the output control circuit is connected.
进一步，所述电压采集电路包括电阻R16和电阻R17，电阻R16的一端与硅链的输出端连接，电阻R16的另一端通过电阻R17接地，电阻R16和电阻R17的公共连接点作为电压采集电路的输出端与第二比较电路的输入端连接。Further, the voltage acquisition circuit includes a resistor R16 and a resistor R17, one end of the resistor R16 is connected to the output end of the silicon chain, the other end of the resistor R16 is grounded through the resistor R17, and the common connection point of the resistor R16 and the resistor R17 is used as the voltage acquisition circuit. The output end is connected with the input end of the second comparison circuit.
进一步，所述第二比较电路包括运放U2、电阻R14和可调电阻R15；Further, the second comparison circuit includes an operational amplifier U2, a resistor R14 and an adjustable resistor R15;
运放U2的反相端作为第二比较电路的输入端，运放U2的同相端通过电阻R14接地，运放U2的同相端通过可调电阻R15与电源VCC连接，运放U2的输出端与输出控制电路的第二控制输入端连接。The inverting terminal of the operational amplifier U2 is used as the input terminal of the second comparison circuit, the non-inverting terminal of the operational amplifier U2 is grounded through the resistor R14, the non-inverting terminal of the operational amplifier U2 is connected to the power supply VCC through the adjustable resistor R15, and the output terminal of the operational amplifier U2 is connected to the power supply VCC. The second control input of the output control circuit is connected.
进一步，所述输出控制电路包括三极管Q4、三极管Q5、三极管Q6、电阻R10、电阻R11、电阻R12以及电阻R13；Further, the output control circuit includes a transistor Q4, a transistor Q5, a transistor Q6, a resistor R10, a resistor R11, a resistor R12, and a resistor R13;
三极管Q4的基极作为输出控制电路的第一控制输入端与第一比较电路的输出端连接，三极管Q4的发射极接地，三极管Q4的集电极通过电阻R10与电源VCC连接，三极管Q5的基极与三极管Q4的集电极连接，三极管Q5的发射极通过电阻R11与电源VCC连接，三极管Q5的集电极与三极管Q6的集电极连接，三极管Q6的发射极与电阻R13的一端连接，电阻R13的另一端作为输出控制电路的输出端，三极管Q6的基极与电阻R12的一端连接，电阻R12的另一端作为输出控制电路的第二控制输入端。The base of the transistor Q4 is used as the first control input terminal of the output control circuit and is connected to the output terminal of the first comparison circuit, the emitter of the transistor Q4 is grounded, the collector of the transistor Q4 is connected to the power supply VCC through the resistor R10, and the base of the transistor Q5 It is connected to the collector of the transistor Q4, the emitter of the transistor Q5 is connected to the power supply VCC through the resistor R11, the collector of the transistor Q5 is connected to the collector of the transistor Q6, the emitter of the transistor Q6 is connected to one end of the resistor R13, and the other end of the resistor R13 One end is used as the output end of the output control circuit, the base of the transistor Q6 is connected to one end of the resistor R12, and the other end of the resistor R12 is used as the second control input end of the output control circuit.
进一步，所述控制器为单片机。Further, the controller is a single-chip microcomputer.
进一步，还包括无线通信模块和远程监控中心，所述远程监控中心包括监控服务器、显示器以及报警器；Further, it also includes a wireless communication module and a remote monitoring center, and the remote monitoring center includes a monitoring server, a display and an alarm;
所述监控服务器通过无线通信模块与控制器通信连接，所述监控服务器与显示器和报警器连接。The monitoring server communicates with the controller through the wireless communication module, and the monitoring server is connected with the display and the alarm.
本发明的有益效果：能够准确检测硅链的开路状态，并在开路出现时及时执行相应的开路保护，从而有效确保直流电源系统的稳定运行，避免安全事故的发生。The beneficial effect of the present invention is that the open circuit state of the silicon chain can be accurately detected, and the corresponding open circuit protection is implemented in time when the open circuit occurs, thereby effectively ensuring the stable operation of the DC power supply system and avoiding the occurrence of safety accidents.
附图说明Description of drawings
下面结合附图和实施例对本发明作进一步描述：The present invention will be further described below in conjunction with accompanying drawing and embodiment:
图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2为本发明的继电器控制电路原理图。Fig. 2 is a schematic diagram of the relay control circuit of the present invention.
图3为本发明的开路检测控制电路原理图。Fig. 3 is a schematic diagram of an open circuit detection control circuit of the present invention.
具体实施方式Detailed ways
以下结合说明书附图对本发明做出进一步详细说明：Below in conjunction with accompanying drawing, the present invention is described in further detail:
本发明提供的一种直流电源系统中的硅链开路保护系统，所述硅链由多个硅链单元串联形成，包括控制器、开路检测控制电路、继电器以及继电器控制电路；The present invention provides a silicon chain open circuit protection system in a DC power supply system, the silicon chain is formed by a plurality of silicon chain units connected in series, including a controller, an open circuit detection control circuit, a relay and a relay control circuit;
所述继电器的个数与硅链单元的个数相同，所述继电器的开关与对应的硅链单元并联，所述继电器控制电路用于控制继电器的开关的闭合与断开，所述继电器控制电路的第一控制端与控制器的控制输出端连接，继电器控制电路的第二控制端与开路检测控制电路的控制输出端连接，所述继电器控制的第三控制端与控制器的控制输出端连接，所述开路检测控制电路的控制输出端还与控制器的输入端连接，通过本发明，能够准确检测硅链的开路状态，并在开路出现时及时执行相应的开路保护，从而有效确保直流电源系统的稳定运行，避免安全事故的发生；其中，控制器采用现有的单片机实现，比如STM32系列单片机，89S51系列单片机，这些单片机都具有相应的产品规格书，对单片机的性能、引脚功能以及外围电路均具有相应的说明，因此，用户只需要根据自身的成本需要、工况需要等选用相应的单片机，然后根据厂家提供的产品规格书进行相应的线路搭建即可，在此不进行详细赘述。The number of the relays is the same as that of the silicon chain units, the switches of the relays are connected in parallel with the corresponding silicon chain units, the relay control circuit is used to control the closing and opening of the switches of the relays, and the relay control circuit The first control end of the relay control circuit is connected to the control output end of the controller, the second control end of the relay control circuit is connected to the control output end of the open circuit detection control circuit, and the third control end of the relay control is connected to the control output end of the controller , the control output end of the open circuit detection control circuit is also connected to the input end of the controller. Through the present invention, the open circuit state of the silicon chain can be accurately detected, and the corresponding open circuit protection is executed in time when the open circuit occurs, thereby effectively ensuring the DC power supply The stable operation of the system can avoid the occurrence of safety accidents; among them, the controller is realized by the existing single-chip microcomputer, such as STM32 series single-chip microcomputer, 89S51 series single-chip microcomputer, these single-chip microcomputers have corresponding product specifications, and the performance of the single-chip microcomputer, pin function and Peripheral circuits have corresponding instructions. Therefore, users only need to select the corresponding single-chip microcomputer according to their own cost needs and working conditions, and then build the corresponding circuits according to the product specifications provided by the manufacturer. I will not go into details here. .
本实施例中，所述继电器控制电路包括三极管Q1、电阻R1、二极管D2、二极管D1、电阻R2、电阻R3、电阻R4、三极管Q2、三极管Q3以及可控硅SCR1；In this embodiment, the relay control circuit includes a triode Q1, a resistor R1, a diode D2, a diode D1, a resistor R2, a resistor R3, a resistor R4, a triode Q2, a triode Q3 and a thyristor SCR1;
所述电阻R1的一端连接于直流电源系统的充电母线，电阻R1的另一端与通过继电器的线圈与三极管Q1的集电极连接，三极管Q1的发射极接地，三极管Q1的基极与二极管D2的负极连接，二极管D2的正极作为继电器控制电路的第一控制端与控制器的控制输出端连接，三极管Q1的基极还与可控硅SCR1的负极连接，可控硅SCR1的正极通过电阻R5与三极管Q2的集电极连接，可控硅SCR1的控制极作为继电器控制电路的第二控制端；One end of the resistor R1 is connected to the charging bus of the DC power supply system, the other end of the resistor R1 is connected to the collector of the transistor Q1 through the coil of the relay, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to the cathode of the diode D2 connection, the anode of the diode D2 is connected to the control output end of the controller as the first control terminal of the relay control circuit, the base of the triode Q1 is also connected to the negative pole of the thyristor SCR1, and the positive pole of the thyristor SCR1 is connected to the triode through the resistor R5 The collector of Q2 is connected, and the control pole of the thyristor SCR1 is used as the second control terminal of the relay control circuit;
三极管Q2的发射极通过电阻R2接电源VCC，电阻R3的一端连接于电源VCC，电阻R3的另一端通过电阻R4与三极管Q3的集电极连接，电阻R3和电阻R4之间的公共连接点与三极管Q2的基极连接，三极管Q3的发射极接地，三极管Q3的基极与二极管D1的负极连接，二极管D1的正极作为继电器控制电路的第三控制端；The emitter of the transistor Q2 is connected to the power supply VCC through the resistor R2, one end of the resistor R3 is connected to the power supply VCC, the other end of the resistor R3 is connected to the collector of the transistor Q3 through the resistor R4, and the common connection point between the resistor R3 and the resistor R4 is connected to the transistor The base of Q2 is connected, the emitter of the transistor Q3 is grounded, the base of the transistor Q3 is connected to the cathode of the diode D1, and the anode of the diode D1 is used as the third control terminal of the relay control circuit;
其中，三极管Q2为P型三极管；在本实施例中，仅仅给出了其中一个继电器的继电器控制电路的原理图，本申请的每一个继电器的继电器控制电路的原理均相同，如图2所示，在图2中，DT1、DT2、DTk以及DTn分别表示一个硅链单元，即n各硅链单元，硅链由这些硅链单元串联组成，继电器的开关以K表示，K1表示与第一硅链单元DT1对应的继电器开关，继电器的线圈用J表示，J1表示与第一硅链单元DT1对应的继电器的线圈，图2中，HM表示充电母线，KM表示控制母线，继电器控制电路的第一控制端和第三控制端分别连接于控制器的不同的引脚，通过第一控制端用于控制三极管Q1的导通与截止，第二控制端用于控制三极管Q3的导通与截止，通过上述结构，能够对继电器进行良好的控制，并且能够实现不同的功能。Wherein, the triode Q2 is a P-type triode; in this embodiment, only the schematic diagram of the relay control circuit of one of the relays is given, and the principle of the relay control circuit of each relay in the present application is the same, as shown in Figure 2 , in Fig. 2, DT1, DT2, DTk and DTn represent a silicon chain unit respectively, that is, n silicon chain units, the silicon chain is composed of these silicon chain units in series, the switch of the relay is represented by K, and K1 represents the connection with the first silicon chain unit. The relay switch corresponding to the chain unit DT1, the coil of the relay is represented by J, J1 represents the coil of the relay corresponding to the first silicon chain unit DT1, in Figure 2, HM represents the charging bus, KM represents the control bus, the first relay control circuit The control terminal and the third control terminal are respectively connected to different pins of the controller. The first control terminal is used to control the conduction and cut-off of the transistor Q1, and the second control terminal is used to control the conduction and cut-off of the transistor Q3. The above structure can control the relay well and realize different functions.
本实施例中，所述开路检测电路包括直流电流互感器ZCT、电流采集电路、第一比较电路、电压采集电路、第二比较电路以及输出控制电路；In this embodiment, the open circuit detection circuit includes a DC current transformer ZCT, a current acquisition circuit, a first comparison circuit, a voltage acquisition circuit, a second comparison circuit and an output control circuit;
所述直流电流互感器ZCT设置于硅链的输入侧，电流采集电路的输入端与直流电流互感器ZCT的输出端连接，电流采集电路的输出端与第一比较电路的输入端连接，电压采集电路的输入端设置于硅链的输出端，电压采集电路的输出端与第二比较电路的输入端连接，第一比较电路和第二比较电路的输出端分别与输出控制电路的第一控制输入端和第二控制输入端连接，输出控制电路的输出端分别与可控硅SCR1的控制极以及控制器的输入端连接。The DC current transformer ZCT is arranged on the input side of the silicon chain, the input end of the current acquisition circuit is connected with the output end of the DC current transformer ZCT, the output end of the current acquisition circuit is connected with the input end of the first comparison circuit, and the voltage acquisition circuit The input end of the circuit is set at the output end of the silicon chain, the output end of the voltage acquisition circuit is connected to the input end of the second comparison circuit, and the output ends of the first comparison circuit and the second comparison circuit are respectively connected to the first control input of the output control circuit. The terminal is connected to the second control input terminal, and the output terminal of the output control circuit is respectively connected to the control electrode of the thyristor SCR1 and the input terminal of the controller.
具体地：所述电流采集电路包括电阻R6和电阻R7，电阻R6的一端与直流电流互感器ZCT的输出端连接，电阻R6的另一端通过电阻R7接地，电阻R6和电阻R7的公共连接点作为电流采集电路的输出端与第一比较电路的输入端连接。Specifically: the current acquisition circuit includes a resistor R6 and a resistor R7, one end of the resistor R6 is connected to the output end of the DC current transformer ZCT, the other end of the resistor R6 is grounded through the resistor R7, and the common connection point of the resistor R6 and the resistor R7 is used as The output end of the current acquisition circuit is connected with the input end of the first comparison circuit.
所述第一比较电路包括运放U1、电阻R8和可调电阻R9；The first comparison circuit includes an operational amplifier U1, a resistor R8 and an adjustable resistor R9;
运放U1的反相端作为第一比较电路的输入端，运放U1的同相端通过电阻R8接地，运放U1的同相端通过可调电阻R9与电源VCC连接，运放U1的输出端与输出控制电路的第一控制输入端连接。The inverting terminal of the operational amplifier U1 is used as the input terminal of the first comparison circuit, the non-inverting terminal of the operational amplifier U1 is grounded through the resistor R8, the non-inverting terminal of the operational amplifier U1 is connected to the power supply VCC through the adjustable resistor R9, and the output terminal of the operational amplifier U1 is connected to the The first control input of the output control circuit is connected.
所述电压采集电路包括电阻R16和电阻R17，电阻R16的一端与硅链的输出端连接，电阻R16的另一端通过电阻R17接地，电阻R16和电阻R17的公共连接点作为电压采集电路的输出端与第二比较电路的输入端连接。The voltage acquisition circuit includes a resistor R16 and a resistor R17, one end of the resistor R16 is connected to the output end of the silicon chain, the other end of the resistor R16 is grounded through the resistor R17, and the common connection point of the resistor R16 and the resistor R17 is used as the output end of the voltage acquisition circuit It is connected with the input terminal of the second comparison circuit.
所述第二比较电路包括运放U2、电阻R14和可调电阻R15；The second comparison circuit includes an operational amplifier U2, a resistor R14 and an adjustable resistor R15;
运放U2的反相端作为第二比较电路的输入端，运放U2的同相端通过电阻R14接地，运放U2的同相端通过可调电阻R15与电源VCC连接，运放U2的输出端与输出控制电路的第二控制输入端连接。The inverting terminal of the operational amplifier U2 is used as the input terminal of the second comparison circuit, the non-inverting terminal of the operational amplifier U2 is grounded through the resistor R14, the non-inverting terminal of the operational amplifier U2 is connected to the power supply VCC through the adjustable resistor R15, and the output terminal of the operational amplifier U2 is connected to the power supply VCC. The second control input of the output control circuit is connected.
所述输出控制电路包括三极管Q4、三极管Q5、三极管Q6、电阻R10、电阻R11、电阻R12以及电阻R13；其中，Q5为P型三极管；The output control circuit includes a transistor Q4, a transistor Q5, a transistor Q6, a resistor R10, a resistor R11, a resistor R12, and a resistor R13; wherein, Q5 is a P-type transistor;
三极管Q4的基极作为输出控制电路的第一控制输入端与第一比较电路的输出端连接，三极管Q4的发射极接地，三极管Q4的集电极通过电阻R10与电源VCC连接，三极管Q5的基极与三极管Q4的集电极连接，三极管Q5的发射极通过电阻R11与电源VCC连接，三极管Q5的集电极与三极管Q6的集电极连接，三极管Q6的发射极与电阻R13的一端连接，电阻R13的另一端作为输出控制电路的输出端，三极管Q6的基极与电阻R12的一端连接，电阻R12的另一端作为输出控制电路的第二控制输入端。其中，开路检测控制电路的输出端不仅仅与控制器的输入端连接，而且，还与各个继电器控制电路的第二控制端(即可控硅SCR1的控制极)连接，当需要检测各硅链单元是否存在开路时，比如，检测硅链单元DT1是否存在开路，此时，控制器控制各继电器的继电器控制电路中的三极管Q3处于导通状态，并第2-第n个继电器的继电器控制电路中的三极管Q1导通，从而使得各继电器的开关闭合，而且控制器控制第一继电器J1的控制电路的三极管Q1截止，此时，直流电流互感器采集由充电母线、DT1至控制母线KM的电流，并且采集控制母线KM侧的输出电压值，第一电流采集电路用于将电流信号转换成电压信号，当采集的电流值大于或者等于设定电流值时，第一比较电路输出低电平，且采集的输出电压大于设定值时，第二比较电路同样输出低电平，则表示此时硅链单元处于正常状态，如果采集的电流值小于设定电流值时，第一比较电路输出高电平，且采集的输出电压等于设定值时，第二比较电路同样输出高电平，此时，表示硅链单元DT1开路，当第一比较电路和第二比较电路均输出高电平时，输出控制电路才具有输出，并控制可控硅SCR1处于导通状态，控制三极管Q1(与继电器J1对应的继电器控制电路的三极管)，且同时，由于输出控制电路具有输出，控制器也将得到信号，并且控制其他继电器控制电路的继电器关断，同时，控制器并生成相应的告警信号并发送至远程监控中心，如果硅链单元DT1正常，并且按照上述方法对其他硅链单元进行开路检测，当存在开路故障的硅链单元的故障排除后，通过控制器控制相对应的三极管Q3截止，从而使得可控硅SCR1截止，从而可以实现下一次的开路检测。The base of the transistor Q4 is used as the first control input terminal of the output control circuit and is connected to the output terminal of the first comparison circuit, the emitter of the transistor Q4 is grounded, the collector of the transistor Q4 is connected to the power supply VCC through the resistor R10, and the base of the transistor Q5 It is connected to the collector of the transistor Q4, the emitter of the transistor Q5 is connected to the power supply VCC through the resistor R11, the collector of the transistor Q5 is connected to the collector of the transistor Q6, the emitter of the transistor Q6 is connected to one end of the resistor R13, and the other end of the resistor R13 One end is used as the output end of the output control circuit, the base of the transistor Q6 is connected to one end of the resistor R12, and the other end of the resistor R12 is used as the second control input end of the output control circuit. Wherein, the output end of the open-circuit detection control circuit is not only connected with the input end of the controller, but also connected with the second control end of each relay control circuit (that is, the control pole of the silicon controlled silicon SCR1), when it is necessary to detect the When there is an open circuit in the unit, for example, to detect whether there is an open circuit in the silicon chain unit DT1, at this time, the controller controls the transistor Q3 in the relay control circuit of each relay to be in a conducting state, and the relay control circuit of the 2nd-nth relay The transistor Q1 in the circuit is turned on, so that the switches of each relay are closed, and the controller controls the transistor Q1 of the control circuit of the first relay J1 to be cut off. At this time, the DC current transformer collects the current from the charging bus, DT1 to the control bus KM , and collect the output voltage value of the control bus KM side, the first current collection circuit is used to convert the current signal into a voltage signal, when the collected current value is greater than or equal to the set current value, the first comparison circuit outputs a low level, And when the collected output voltage is greater than the set value, the second comparison circuit also outputs a low level, indicating that the silicon chain unit is in a normal state at this time. If the collected current value is less than the set current value, the first comparison circuit outputs a high level. level, and when the collected output voltage is equal to the set value, the second comparison circuit also outputs a high level. At this time, it means that the silicon chain unit DT1 is open. When both the first comparison circuit and the second comparison circuit output a high level, Only the output control circuit has output, and controls the thyristor SCR1 to be in the conduction state, and controls the transistor Q1 (the transistor of the relay control circuit corresponding to the relay J1), and at the same time, because the output control circuit has an output, the controller will also get the signal , and control the relays of other relay control circuits to turn off, and at the same time, the controller generates a corresponding alarm signal and sends it to the remote monitoring center. After the failure of the silicon chain unit with an open circuit fault is eliminated, the controller controls the corresponding transistor Q3 to be cut off, so that the thyristor SCR1 is cut off, so that the next open circuit detection can be realized.
本实施例中，还包括无线通信模块和远程监控中心，所述远程监控中心包括监控服务器、显示器以及报警器；In this embodiment, a wireless communication module and a remote monitoring center are also included, and the remote monitoring center includes a monitoring server, a display and an alarm;
所述监控服务器通过无线通信模块与控制器通信连接，所述监控服务器与显示器和报警器连接，其中，无线通信模块采用现有的通信模块，比如UWB通信模块、4G通信模块、远程蓝牙模块等，属于现有技术，监控服务器可以采用现有的PC机，报警器采用现有的声光报警器。The monitoring server communicates with the controller through a wireless communication module, and the monitoring server is connected with a display and an alarm, wherein the wireless communication module adopts an existing communication module, such as a UWB communication module, a 4G communication module, a remote bluetooth module, etc. , belongs to the prior art, the monitoring server can adopt the existing PC, and the alarm adopts the existing sound and light alarm.
当然，为了方便使用，可以设置红外、蓝牙接收器并与控制器连接，通过红外遥控器或者蓝牙遥控器向控制器输入相应的命令，属于现有技术，在此不加以赘述。Of course, for the convenience of use, infrared and bluetooth receivers can be installed and connected to the controller, and corresponding commands can be input to the controller through the infrared remote controller or the bluetooth remote controller, which belongs to the prior art and will not be repeated here.
最后说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的宗旨和范围，其均应涵盖在本发明的权利要求范围当中。Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.
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