CN210466049U

CN210466049U - Novel dual-redundancy control system

Info

Publication number: CN210466049U
Application number: CN201921485055.0U
Authority: CN
Inventors: 裴彦明; 张辰玮
Original assignee: Tianjin Mingshuo Mechanical And Electrical Equipment Co Ltd
Current assignee: Tianjin Mingshuo Mechanical And Electrical Equipment Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-05
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses a novel dual-redundancy control system, which comprises a touch screen, two regulators and a pulse switching module; wherein: the touch screen comprises at least two COM interfaces, and each regulator is provided with a COM interface, a high-speed pulse output port and a relay output port; the pulse switching module comprises an input port, a fault monitoring and switching circuit and an output port; the input ports comprise at least two high-speed pulse input ports and at least two relay input ports; the output port comprises a high-speed pulse output port and a relay output port; two COM interfaces of the touch screen are connected with COM interfaces of two regulators in a one-to-one manner through data lines; the high-speed pulse output port of the regulator is connected with the high-speed pulse input port of the pulse switching module, and the relay output port of the regulator is connected with the relay input port of the pulse switching module. The utility model discloses concrete convenient operation, advantage that the security performance is good.

Description

Novel dual-redundancy control system

Technical Field

The utility model relates to a novel dual-redundancy control system, wide application in the main control unit of controlgear such as power station speed regulator, excitation.

Background

With the continuous expansion of the unit capacity of the hydropower station and the increasingly strict requirement on the reliability, the traditional single microcomputer system cannot meet the requirements of some important power stations (units) on the performance and the reliability of a control system. Besides enhancing the reliability of the device itself, the adoption of a dual redundancy system is a good solution. The system adopts two identical sets of control units, one set of system works, the other set of system is in hot standby, when the main unit fails, the standby unit automatically works, and the conversion process is rapid without disturbance.

The traditional dual-redundancy system generally adopts two completely independent regulators, the two regulators share data and track each other in a serial communication mode, and the following defects exist in the traditional dual-redundancy system through practice links: the two sets of regulators are provided with human-computer interfaces, so that the two sets of regulators are required to be respectively arranged when parameters are required to be set, the parameters are required to be the same, and the operation is complicated. The data display also has the above problems. Meanwhile, the upper monitoring computer needs to judge which regulator is the main regulator at present, then reads the data of the main regulator, discards the data of the standby regulator and brings inconvenience to the programming of the upper computer.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art and providing a novel dual-redundancy control system which is convenient to operate.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be:

a novel dual-redundancy control system comprises a touch screen, two regulators and a pulse switching module; wherein: the touch screen comprises at least two COM interfaces, and each regulator is provided with a COM interface, a high-speed pulse output port and a relay output port; the pulse switching module comprises an input port, a fault monitoring and switching circuit and an output port; the input ports comprise at least two high-speed pulse input ports and at least two relay input ports; the output port comprises a high-speed pulse output port and a relay output port; the two COM interfaces of the touch screen are connected with the COM interfaces of the two regulators in a one-to-one manner through data lines; and the high-speed pulse output port of the regulator is connected with the high-speed pulse input port of the pulse switching module, and the relay output port of the regulator is connected with the relay input port of the pulse switching module.

As preferred, the utility model discloses following technical scheme has still been adopted:

and the regulator is provided with a signal input terminal.

And a storage unit used for realizing data sharing of the two regulators is arranged in the touch screen.

The utility model has the advantages and positive effects that:

firstly, the two regulators share one touch screen as a man-machine interface. The user only faces one set of parameter setting and data display device, so that the separation and integration of the dual-system data can be realized through the macro instruction in the touch screen.

And a storage unit for realizing data sharing of the two regulators is arranged in the touch screen, so that the two regulators upload self data and self working state information to the storage unit in real time for the other side to judge and use.

And thirdly, the two regulators can realize one master regulator and one slave regulator, the standby regulator automatically tracks the operational data of the master regulator, and when the master regulator is detected to be in fault or the master regulator and the standby regulator are manually switched, the switching module automatically switches output without time delay. The standby regulator tracks the calculation result of the main regulator in real time, and the calculation is continued on the basis of the calculation result of the main regulator at the switching moment, so that the calculation result has no step, and the whole switching process has no impact and no disturbance.

Drawings

Fig. 1 is a circuit block diagram of the present invention;

FIG. 2 is a partial circuit diagram of the present invention, which is mainly used to display the fault monitoring and switching circuit of the pulse switching module;

fig. 3 is a partial circuit diagram of the present invention, which is mainly used for displaying the high-speed pulse driving output circuit of the pulse switching module;

fig. 4 is a partial circuit diagram of the present invention, which is mainly used for displaying the relay output circuit of the pulse switching module.

Wherein: 1. an upper monitoring computer; 2. a touch screen; 3. a regulator A; 4. a regulator B; 5. and a pulse switching module.

Detailed Description

For further understanding of the contents, features and functions of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings as follows:

referring to fig. 1, a novel dual redundancy control system includes a touch screen 2, a regulator a3, a regulator B4, and a pulse switching module 5; in the using process, an engineer can directly input working instruction parameters to the touch screen 2 or indirectly input the working instruction parameters to the touch screen 2 through the upper monitoring computer 1, the upper monitoring computer 1 is connected with the touch screen 2 through a network cable, and the touch screen 2 receives the working instruction parameters and forwards the working instruction parameters to the regulator 3 on one hand and receives state information parameters fed back by the regulator 3 on the other hand and displays the state information parameters; the two regulators are used for receiving working instruction parameters sent by the touch screen 2 and regulating the working state of the two regulators according to the working instruction parameters; wherein: the touch screen 2 comprises at least two COM interfaces, and in the specific embodiment, the touch screen 2 comprises two COM interfaces, one is a COMA interface, and the other is a COMB interface; the regulator A3 and the upper regulator B4 are both provided with a COM interface, a high-speed pulse output port and a relay output port; the pulse switching module 5 comprises an input port, a fault monitoring and switching circuit and an output port; the input ports include at least two high-speed pulse input ports and at least two relay input ports, and in this specific embodiment, the input ports include two high-speed pulse input ports and two relay input ports; the two high-speed pulse input ports are a high-speed pulse input port A and a high-speed pulse input port B; the two relay input ports are a relay input port A and a relay input port B; the output port comprises a high-speed pulse output port and a relay output port; the COMA interface of the touch screen 2 is connected with the COM interface of the regulator A3, the COMB interface of the touch screen 2 is connected with the COM interface of the regulator B4, the high-speed pulse output port of the regulator A3 is connected with the high-speed pulse input port A of the pulse switching module 5, the high-speed pulse output port of the regulator B4 is connected with the high-speed pulse input port B of the pulse switching module 5, the relay output port of the regulator A3 is connected with the relay input port A of the pulse switching module 5, and the relay output port of the regulator B4 is connected with the relay input port B of the pulse switching module 5.

Preferably, the regulator a3 and the regulator B4 are each provided with a signal input terminal; thus, during operation, when the touch screen is out of order or otherwise, the engineer can directly give an operation command to the regulator a3 or the regulator B4 through the signal input terminal. Meanwhile, in order to realize better information sharing between the regulator A3 and the regulator B4, a storage unit for realizing data sharing between the two regulators is arranged in the touch screen 2, during the working process, the regulator A3 and the regulator B4 send the working state information of the regulators to the storage unit in real time, and the regulator A3 and the regulator B4 can also read the working state information of the other regulator from the storage unit in real time.

The working process of the specific embodiment is as follows: an engineer directly or indirectly inputs working instruction parameters to the touch screen 2, where the working instruction parameters mainly include adjusting attributes of two regulators, that is, controlling one regulator as a main working device and the other regulator as a standby working device, in order to better explain the problem, in this embodiment, the regulator A3 is temporarily selected as the main working device and the regulator B4 as the standby working device, at this time, the regulator A3 controls the operation of the pulse switching module 5, during the operation of the pulse switching module 5, the pulse switching module 5 further receives the operation pulse signals of the regulator A3 and the regulator B4 in real time, the pulse switching module 5 analyzes the two operation pulse signals by using an internal fault monitoring and switching circuit, when the regulator A3 fails, the pulse switching module 5 switches the working state, that is, the pulse switching module 5 uses the regulator B4 as the main working device, and receiving the work instruction information sent by the regulator B4, and taking the regulator A3 as a standby work device.

In the above embodiment, the upper monitoring computer 1, the touch screen 2, the regulator a3, and the regulator B4 are all conventional electronic devices, and therefore, detailed descriptions thereof are omitted, and the circuit structure of the pulse switching module 5 will be described in detail herein, please refer to fig. 2, in which fig. 2 is a circuit for monitoring and switching a fault of the pulse switching module.

Referring to fig. 2, fig. 2 is a circuit for monitoring and switching a fault of the pulse switching module in the above embodiment, wherein: the fault monitoring circuit comprises a regulator A fault monitoring part, a regulator B fault monitoring part and a switching circuit part; since the circuit structures and the operating principles of the regulator a fault monitoring section and the regulator B fault monitoring section are the same, the regulator a fault monitoring section is taken as an example for detailed description here:

the main function of the regulator A fault monitoring part is to detect the operation state of the regulator A3, and as long as the regulator A3 does not output an operation pulse signal, the circuit will output a fault signal, one path of which is used for driving the LED1 to indicate the fault, and the other path of which is output to the switching circuit part. The regulator a3 operates a pulse signal, which is connected to the ch1_ pulse end, and after being shaped and driven by the inverter D1A, enters a CR circuit composed of a capacitor C1 and a resistor R3, and is converted into a positive spike pulse. This pulse is applied to the base of transistor Q1, which turns transistor Q1 on once for each specified time (which coincides with the period of the regulator a running pulse). The resistor R9 and the capacitor C3 form a resistance-capacitance charging circuit, and when the voltage of the capacitor C3 is charged to the voltage of the non-inverting terminal of the comparator U1A, the comparator is turned over and outputs a fault signal. Normally, the transistor Q1 will be turned on continuously to discharge the capacitor C3, so as long as the regulator a has an operation pulse output, the capacitor C3 will not be charged with the voltage for turning over the comparator U1A, so there will be no fault output.

The switching circuit part is an RS trigger circuit consisting of 4 NAND gates, wherein: s1 is a channel selection switch. The path selected at S1 is selected if the path is not faulty. As described above, the fault monitoring circuit sends a fault signal to the circuit, and the RS flip-flop changes the output and switches the channel. Thus: through the circuit, the pulse switching module 5 can automatically judge the working states of the two regulators, and when the main regulator fails, for example, crashes, the main regulator can be automatically switched to the standby regulator for output. And after the fault is recovered, the output channel is automatically switched back.

Referring to fig. 3, fig. 3 is a high-speed pulse driving output circuit of the pulse switching module, in the present embodiment, the high-speed pulse driving output circuit includes an alternative electronic switch D3 and an alternative electronic switch D4, and 6-way signal selection can be realized through the alternative electronic switch D3 and the alternative electronic switch D4. 6 paths of signals output by the two-choice electronic switch D3 and the two-choice electronic switch D4 pass through the Darlington tubes Q29-Q34, and are finally output to drive an external excitation pulse transformer.

Referring to fig. 4, fig. 4 is a relay output circuit of the pulse switching module, the relay output circuit includes an one-of-two electronic switch D5 and an one-of-two electronic switch D6, and 6-path signal selection can be realized through the one-of-two electronic switch D5 and the one-of-two electronic switch D6. 6 paths of signals output by the two-choice electronic switch D5 and the two-choice electronic switch D6 are output through the integrated driving chip D7, and an external relay coil can be driven.

The pulse switching module 5 in this embodiment adopts an electronic switch to realize 6-way high-speed pulse output and 6-way relay output, and has an amplification driving circuit, so that the excitation pulse transformer and the relay coil can be directly driven.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A novel dual-redundancy control system is characterized in that: the touch screen comprises a touch screen, two regulators and a pulse switching module; wherein: the touch screen comprises at least two COM interfaces, and each regulator is provided with a COM interface, a high-speed pulse output port and a relay output port; the pulse switching module comprises an input port, a fault monitoring and switching circuit and an output port; the input ports comprise at least two high-speed pulse input ports and at least two relay input ports; the output port comprises a high-speed pulse output port and a relay output port; the two COM interfaces of the touch screen are connected with the COM interfaces of the two regulators in a one-to-one manner through data lines; and the high-speed pulse output port of the regulator is connected with the high-speed pulse input port of the pulse switching module, and the relay output port of the regulator is connected with the relay input port of the pulse switching module.

2. The novel dual redundant control system of claim 1, wherein: and the regulator is provided with a signal input terminal.

3. The novel dual redundant control system of claim 1, wherein: and a storage unit used for realizing data sharing of the two regulators is arranged in the touch screen.