Integrated gate intelligent measurement and control protection device

Abstract

The invention belongs to the technical field of water conservancy, and discloses an integrated gate intelligent measurement and control protection device which comprises a man-machine interaction module, a CPU module, a communication module, an electrical quantity acquisition module, an opening load acquisition module, a switching value module and an analog quantity module. The CPU module is used for realizing acquisition processing, operation, logic control, data analysis and fault early warning of gate data; the electrical quantity acquisition module, the opening load acquisition module, the switching value module and the analog quantity module are in communication connection with the CPU module through an internal bus. The integrated and modular design is adopted, the integration level is higher, simple accumulation is avoided, follow-up maintenance and spare part management are easier, and unnecessary troubles are reduced for an operation management unit; in addition, complete protection logic is designed in the integrated gate intelligent measurement and control protection device, and it can be guaranteed that a gate system operates more safely and efficiently.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy, and specifically relates to an integrated gate intelligent measurement, control and protection device. Background Art

[0002] For various types of gates in sluices, dams or other structures in water conservancy projects, it is necessary to monitor the operating status, real-time opening, operating current and other data of the gates in real time, and to provide protection and early warning for abnormal operating conditions of the gates in operation, to avoid accidents such as gate jamming, motor burning, gate top impact, etc., which is an important guarantee for the safe operation of the gates.

[0003] At present, the mainstream technical route for gate measurement and control protection is multi-device integration, usually using a configuration scheme of PLC + power meter + opening load meter + thermal relay. There are some drawbacks in the current scheme, which requires technical upgrades and improvements. The main problems are: (1) The degree of integration is low, making it difficult to achieve effective integration, which is not conducive to subsequent maintenance and spare parts management. (2) It is easy to have problems with untimely protection and early warning. (3) Power meters can only collect and monitor at present, and electrical quantity protection is not applied in gates. The existing electrical protection of motors mainly uses thermal relays, which have low action sensitivity and long action time. When the motor is really blocked, it is often unable to quickly cut off the motor circuit, causing gate top accidents. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide an integrated gate intelligent measurement and control protection device, which adopts integrated design, modularization and programmable design ideas, integrates the functions of power meter + opening load meter + thermal relay in the traditional solution, realizes the collection of electrical quantity (voltage, current, power, power factor of gate motor), gate opening, load signal collection, display, signal output, internal programmable control, realizes automatic control of gate lifting and stopping, and realizes motor overcurrent, overload, phase loss, stall protection, etc. And reserve relevant hard contact signal output and analog signal output, can output relevant position, alarm, accident signal, gate opening, load analog signal to PLC.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions: The integrated gate intelligent measurement and control protection device includes a chassis, a human-computer interaction module, a CPU module, a communication module, an electrical quantity acquisition module, an opening / load acquisition module, a switch quantity module, and an analog quantity module; each module is installed in the chassis by plugging and unplugging; each module is connected to the data bus on the chassis to realize data transmission; CPU module realizes gate data collection and processing, calculation, logic control, data analysis, and fault warning; The electrical quantity collection module collects electrical quantities such as voltage, current, and power of the gate electrical circuit; Opening\load acquisition module, collects gate opening encoder data and load sensor data; Switching quantity module (IO module) realizes the acquisition and output of switching quantity; Analog module, collects sensor data such as upstream and downstream water level and pressure; Human-computer interaction module, providing an interface for users to communicate with protection devices; A communication module, used for data exchange between the protection device and external equipment or systems; The electrical quantity acquisition module, the opening / load acquisition module, the switch quantity module, and the analog quantity module are connected to the CPU module through the internal bus; The protection device also includes a programmable logic controller (PLC), which is connected to the CPU module and other modules via the communication module.

[0006] The protection device also includes a power supply module, which provides stable power to various modules of the entire protection device; the power supply module is connected to other modules through power lines inside the chassis.

[0007] The CPU module realizes the functions of collecting and processing the information and data related to the gate operation, calculation, logic control, data analysis, fault warning, protection, etc., and realizes the operation monitoring of the gate and its ancillary equipment.

[0008] Furthermore, the device also includes a double limit device, which is connected to the CPU module. The double limit device includes an upper limit sensor and a lower limit sensor of the gate. The system is designed with 2 sets, which are divided into an upper upper limit switch signal, an upper limit switch signal, a lower limit switch signal, and a lower lower limit switch signal. The normal working stroke of the gate is set between the upper limit switch signal and the lower limit switch signal; the upper upper limit switch signal and the lower lower limit switch signal are the allowable working limits. Regardless of whether the gate is opened and closed through the automation system or manual electric control, the rising process only needs to trigger the upper upper limit switch signal and the upper limit switch signal system interlock to cut off the rising action; the descending process only needs to trigger the lower lower limit switch signal and the lower limit switch signal system interlock to cut off the rising action.

[0009] Furthermore, the programmable module echo touch screen terminal and the programmable module echo single-chip computer, as the display terminal, can receive and echo the engineering files issued by the editing software; can connect to the central control cloud server to receive the control instructions of the remote control terminal software; can connect and control other modules of the protection device; programmable design, in line with IEC61131-3 standard, support ladder diagram language (LD), instruction list language (IL), function block diagram language (FBD), sequential function flow chart language (SFC) and structured text language (ST) 5 programming languages, provide more complete logic control for the gate unit, and can provide more complete protection logic, intelligent algorithm and intelligent control function according to the application scenario.

[0010] Furthermore, the PLC module serves as a core control unit and connects other modules via a CAN interface to achieve data acquisition and control; the CPU (central processing unit) module serves as the core computing and control unit of the entire system and connects other modules via a CAN interface to build a distributed control system.

[0011] Furthermore, the communication between the CPU and the PLC includes Ethernet and RS-485 communication.

[0012] Beneficial effects: The integrated gate intelligent measurement, control and protection device integrates the functions of multiple devices such as power meter + opening load meter + thermal relay + PLC, adopts an integrated and modular design, with higher integration. It is not a simple accumulation, and is easier to maintain and manage spare parts in the future, thus eliminating unnecessary troubles for the operation and management unit. In addition, the integrated gate intelligent measurement, control and protection device has a complete protection logic designed inside to ensure that the gate system operates more safely and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 This is the electrical principle diagram of the position limiting double protection circuit of the present invention.

[0015] Figure 3 This is a gate signal disconnection detection logic diagram of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] As shown in the figure, the integrated gate intelligent measurement, control and protection device includes a chassis, a human-computer interaction module, a CPU module, a communication module, an electrical quantity acquisition module, an opening / load acquisition module, a switch quantity module, and an analog quantity module.

[0019] Each module is installed in the chassis through plug-in and unplug, and is connected through the standard slot on the chassis backplane. The standard slot can provide interfaces such as data bus and power pins to ensure that each module can achieve reliable electrical connection. Each module is connected to the data bus on the chassis to realize data transmission. In this embodiment, the CAN bus is used, and each module (such as CPU module, electrical quantity acquisition module, opening / load acquisition module, switch quantity module, analog quantity module, etc.) is connected to the bus through an interface circuit to communicate data according to the bus protocol. The CPU module can act as a bus master device to initiate a data transmission request, and the acquisition module responds to the request as a slave device and sends the collected data to the bus for the CPU module to read.

[0020] CPU module: realizes the functions of gate data collection, processing, calculation, logic control, data analysis, fault warning, etc.; the CPU module is the core of the entire protection device and receives data from various collection modules. For the voltage and current data transmitted by the electrical quantity collection module, the CPU module calculates according to the preset protection algorithm. For example, in overcurrent protection, the CPU module compares the collected current value with the preset overcurrent setting value. If the collected current exceeds the setting value and the duration reaches the set time delay, the CPU will determine that an overcurrent fault has occurred. For the opening / load data transmitted by the opening / load collection module, the CPU determines whether the gate opening exceeds the normal range or whether the load is overloaded. The CPU also processes switch quantity and analog quantity data and performs logical judgments, such as judging the system operation mode based on the combined status of multiple switch quantities.

[0021] The electrical quantity acquisition module collects electrical quantities such as voltage, current, and power of the gate electrical circuit; the electrical quantity acquisition module is connected to external transformers (current transformers and voltage transformers) through cables. The electrical quantity acquisition module collects data from current transformers and voltage transformers, and then processes them through filtering, sampling and holding, etc. to convert analog signals into digital signals for processing by the CPU module.

[0022] The opening / load acquisition module is connected to the external sensor through the signal line to collect the gate opening encoder data and load sensor data. The opening acquisition module measures the degree of opening of the gate, and the load acquisition module obtains the load acting on the gate. The acquisition module collects the sensors installed on the gate transmission mechanism (such as rotary encoders for opening measurement and pressure sensors for load measurement) to obtain physical quantities, and converts them into electrical signals, and then obtains digital signals that can be processed by the CPU module through amplification, analog-to-digital conversion and other links.

[0023] The switch quantity module (IO module) realizes the acquisition and output of switch quantity; the switch quantity module is connected to the external switch device (such as button, relay contact, etc.) through the signal line. The state of the switch quantity is determined by detecting the on-off signal in the circuit. When the external switch is closed, the corresponding input channel will detect a high-level signal (or low-level signal, depending on the circuit design) and convert it into a digital signal for the CPU module to process.

[0024] The analog module (AI acquisition DI acquisition) collects sensor data such as upstream and downstream water level and pressure; the analog module is connected to external analog sensors (such as pressure sensors, water level meters, etc.) through signal lines. The input analog signal is conditioned, including signal amplification, filtering, linearization, analog-to-digital conversion and other operations, to obtain a digital signal that can be processed by the CPU module.

[0025] The human-computer interaction module (touch screen, button indicator light) provides an interface for users to communicate with the protection device; users can view the operating parameters, voltage and current data, gate opening and other information of the protection device through the human-computer interaction module. At the same time, users can also set the parameters of the protection device through the human-computer interaction module, such as adjusting the setting value of the overcurrent protection, setting the upper and lower limits of the gate opening, etc.

[0026] The communication module is used for data exchange between the protection device and external equipment; the communication module is connected to the external equipment through a communication cable. The data collected and processed by the protection device is sent to the external equipment, so that the remote monitoring center can grasp the operating status of the protection device gate in real time and monitor the status of the gate at any time. At the same time, it can also receive control commands from external equipment, such as remote control of the opening and closing operations of the circuit breaker.

[0027] The protection device also includes a power supply module, which provides stable power to various modules of the entire protection device; the power supply module is connected to other modules through power lines inside the chassis.

[0028] The CPU module realizes the functions of collecting and processing the information and data related to the gate operation, calculation, logic control, data analysis, fault warning, protection, etc., and realizes the operation monitoring of the gate and its ancillary equipment.

[0029] The PLC module serves as the core control unit and connects to other modules through the CAN interface. The CPU (central processing unit) module serves as the core computing and control unit of the entire system and connects to other modules through CAN to build a distributed control system.

[0030] The communication between CPU and PLC includes Ethernet and RS-485 communication. In this embodiment, Ethernet communication is adopted, and RJ-45 interface and network cable are used to connect with external devices; RS-485 communication can also be adopted, and DB-9 interface and twisted pair are used for connection.

[0031] It adopts an integrated design, a 4U industrial chassis, and module plug-in installation. It integrates electrical quantity acquisition, multi-type opening signal measurement, load signal measurement, electrical quantity protection, programmable logic control, human-computer interaction and other functions. One gate and one device realize unit control, and realize data acquisition, data processing, operation monitoring, programmable control, data analysis, equipment diagnosis, fault warning, fault protection and other functions of the gate and auxiliary equipment, meeting the needs of high-quality and safe operation of the gate.

[0032] like Figure 2 As shown, the device also includes a double limit device, which is connected to the CPU module. The double limit device includes an upper limit sensor and a lower limit sensor of the gate. The system is designed with 2 sets, which are divided into an upper upper limit switch signal, an upper limit switch signal, a lower limit switch signal, and a lower lower limit switch signal. The normal working stroke of the gate is set between the upper limit switch signal and the lower limit switch signal; the upper upper limit switch signal and the lower lower limit switch signal are the allowable working limits. Regardless of whether the gate is opened and closed through the automation system or manual electric control, the rising process only needs to trigger the upper upper limit switch signal and the upper limit switch signal system interlock to cut off the rising action; the falling process only needs to trigger the lower lower limit switch signal and the lower limit switch signal system interlock to cut off the rising action.

[0033] Design a gate jam protection algorithm to achieve safe protection of the sluice.

[0034] like Figure 3 As shown in the figure, a gate position signal disconnection detection algorithm is designed to achieve safety protection of the water gate. It includes the following steps: S1 Determine the normal value range based on the design parameters of the sluice gate, including the maximum and minimum openings of the gate, and the corresponding normal gate position signal analog range under different openings; it is necessary to consider the type, size, installation and use location of the gate (such as the impact of temperature and humidity, environment on the sensor), and the characteristics of the sensor.

[0035] The S2 CPU module processes and judges the collected analog quantity to determine whether the collected analog quantity data is within the normal value range; S3 assigns the gate channel value to the AI_Value array. The AI_Value array is a data structure specifically used to store gate channel values. When the gate value is normal, the collected gate channel value is stored in the AI_Value array according to the predetermined format. During the storage process, the corresponding timestamp can be recorded at the same time to facilitate the subsequent analysis of the time series of gate changes. During the assignment process, the AI_Value array is verified to ensure that the stored data has no errors due to interference during transmission or storage. If the verification fails, the gate channel value is re-collected and the assignment is attempted again.

[0036] S4 Set the gate channel quality. As an important intermediate quantity, the channel quality is used to reflect the state of the gate channel. When the gate value is normal, the channel quality is set to 0, indicating that the channel is operating normally. If the gate channel is abnormal, 0 is assigned to the AI_Value array, and the channel quality (an intermediate quantity) is set to 1 for channel fault alarm and terminates the gate control program.

[0037] S4 gate channel quality setting, channel quality is an important intermediate quantity used to reflect the gate channel Design an operation timeout protection algorithm. After receiving the opening and closing command, the sluice gate determines the stroke to the upper limit, lower limit or target opening, and automatically calculates the operation time according to the opening and closing speed. When the operation time exceeds the maximum operation time calculated by the system, the system automatically stops the gate operation and sends an alarm signal to prevent failures caused by failure of the limit sensor and gate position meter.

[0038] Design the electrical quantity protection algorithm of the gate hoist: Design the electrical quantity collection element in the electrical circuit of the gate hoist, collect and monitor the three-phase current and voltage when the gate hoist is running. In order to avoid the starting current of the motor, the electrical quantity protection of the gate hoist is set to two stages. The gate motor starts the high current protection (the protection automatically exits the low current protection), and starts to calculate the motor working time t0. If the current value is greater than the set value of the high current protection during the starting stage, the gate is judged to be faulty; if the motor working time t0 is greater than the motor starting time setting t1, the high current protection is automatically exited, and the low current protection is automatically entered. If the motor working current I is not greater than the low-value quick-break current setting Il, the gate is opened and closed normally; otherwise, the gate is judged to be faulty, the system automatically stops the gate operation, and sends an alarm signal.

[0039] In view of the possible failures and abnormal operating conditions that may occur during the operation of the sluice, the integrated gate intelligent measurement, control and protection device has designed safety protection measures for the sluice from the hardware and software aspects of the local control system. The software includes the design of gate jam protection, gate position signal disconnection detection, operation timeout protection, electrical quantity protection and other functions. The hardware is convenient, and the system structure, connection method, etc. are optimized. The integrated gate intelligent measurement, control and protection device of this embodiment can keep the sluice running in a fully automatic, efficient and safe state, comprehensively improve the efficiency and effectiveness of the sluice operation management, and is of great significance to improving the regional water resources scheduling mode.

[0040] Example 2

[0041] In a large-scale water conservancy project, the protection device of Example 1 of the present invention is used to control the gate.

[0042] By using ladder diagram language (LD), the basic opening and closing logic of the gate was quickly constructed to ensure accurate control of water flow under different water level conditions.

[0043] By using the Function Block Diagram (FBD) language, the data from various sensors are integrated to achieve real-time monitoring of the gate status.

[0044] When the water level exceeds the warning line, the protection device automatically triggers the emergency shutdown program and quickly closes the gate using an efficient instruction set written in instruction list language (IL).

[0045] Through the sequential function flow chart language (SFC), the gate scheduling plan is designed to intelligently adjust the gate opening according to different seasons and water flow conditions to achieve reasonable allocation of water resources.

[0046] Using intelligent algorithms written in structured text language (ST), the wear of the gate is analyzed in real time, possible failures are predicted in advance, and maintenance is carried out in a timely manner.

[0047] The device also includes a programmable module, which echoes the touch screen and the microcontroller. As the display terminal, it provides the following functions: it can receive and echo the engineering files issued by the editing software; it can connect to the central control cloud server and receive the control instructions of the remote control software; it can connect to and control other modules of the protection device; it is programmable in design and complies with the IEC61131-3 standard, and supports five programming languages: ladder diagram language (LD), instruction list language (IL), function block diagram language (FBD), sequential function flow chart language (SFC) and structured text language (ST), providing a more complete logic control for the gate unit, and can provide more complete protection logic, intelligent algorithm and intelligent control functions according to the application scenario.

[0048] The system uses domestically produced self-controlled software and hardware, and uses high-performance domestically produced CPU and GPU. The system adopts an integrated design, integrating PLC, electrical measurement, opening measurement, load measurement, equipment health, machine vision and other technologies to achieve data collection, data processing, operation monitoring, programmable control, data analysis, equipment diagnosis, fault warning, fault protection and other functions of the gate and auxiliary equipment. The programmable module can be customized according to actual needs.

[0049] The above are only preferred technical solutions of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements without departing from the principles of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. Integrated gate intelligent measurement, control and protection device, characterized by: Including human-computer interaction module, CPU module, communication module, electrical quantity acquisition module, opening / load acquisition module, switch quantity module, analog quantity module; CPU module realizes gate data collection and processing, calculation, logic control, data analysis, and fault warning; Electrical quantity collection module, collects electrical quantities such as voltage, current, power, etc. of the gate electrical circuit; Opening\load acquisition module, collects gate opening encoder data and load sensor data; Switching quantity module, which realizes the acquisition and output of switching quantity; Analog module, collects sensor data such as upstream and downstream water level and pressure; Human-computer interaction module, providing an interface for users to communicate with protection devices; A communication module, used for data exchange between the protection device and equipment or system; The electrical quantity acquisition module, the opening / load acquisition module, the switch quantity module, and the analog quantity module are connected to the CPU module through the internal bus.

2. The integrated gate intelligent measurement, control and protection device according to claim 1, characterized in that: It also includes a chassis, and each module is plugged in and installed in the chassis; each module is connected to a data bus on the chassis to realize data transmission.

3. The integrated gate intelligent measurement, control and protection device according to claim 2 is characterized in that: It also includes a power module to provide stable power to each module of the entire protection device; The power module is connected to other modules through power cables inside the chassis.

4. The integrated gate intelligent measurement, control and protection device according to claim 2, characterized in that: It also includes a double limit device, which is connected to the CPU module; the double limit device includes an upper limit sensor and a lower limit sensor of the gate.

5. The integrated gate intelligent measurement, control and protection device according to claim 4, characterized in that: The upper limit sensor and the lower limit sensor are designed in two sets, each of which is divided into an upper upper limit switch signal, an upper limit switch signal, a lower limit switch signal, and a lower lower limit switch signal.

6. The integrated gate intelligent measurement, control and protection device according to claim 1, characterized in that: It also includes a programmable module, the programmable module echoes the touch screen end, and the programmable module echoes the single-chip microcomputer.

7. The integrated gate intelligent measurement, control and protection device according to claim 6, characterized in that: The programmable module supports five programming languages: ladder diagram language, instruction table language, function module diagram language, sequential function flow chart language and structured text language.

8. The integrated gate intelligent measurement, control and protection device according to claim 7, characterized in that: The programmable module serves as a core control unit and is connected to other modules via a CAN interface.

9. The integrated gate intelligent measurement, control and protection device according to claim 8, characterized in that: The CPU module serves as the core computing and control unit of the entire system, and can build a distributed control system by connecting other modules via CAN.

10. The integrated gate intelligent measurement, control and protection device according to claim 6, characterized in that: The communication between the CPU module and the PLC includes Ethernet and RS-485 communication.

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