CN112327150B - Intelligent running-in experiment platform for medium-voltage circuit breaker and control method of intelligent running-in experiment platform - Google Patents
Intelligent running-in experiment platform for medium-voltage circuit breaker and control method of intelligent running-in experiment platform Download PDFInfo
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- CN112327150B CN112327150B CN202011134350.9A CN202011134350A CN112327150B CN 112327150 B CN112327150 B CN 112327150B CN 202011134350 A CN202011134350 A CN 202011134350A CN 112327150 B CN112327150 B CN 112327150B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
Abstract
The invention discloses an intelligent running-in experiment platform of a medium-voltage circuit breaker and a control method thereof, relates to the field of power equipment experiments, and aims to meet the requirements that multiple paths of medium-voltage circuit breakers of different types can simultaneously carry out automatic running-in experiments and automatic reclosing running-in experiments, carry out multi-directional protection on the experiment platform and the medium-voltage circuit breaker, do not need to be attended by a special person, record and transmit real-time state information of each path of medium-voltage circuit breaker to a corresponding monitoring terminal through a wireless network, diagnose faults occurring in the experiment process and give an alarm, realize remote monitoring, improve the safety and the experiment efficiency of the running-in experiments of the medium-voltage circuit breaker, enable the running-in experiments to realize intellectualization and informatization, have simple hardware structure and accurate software control, avoid loss caused by hardware burnout and the like, reduce the cost of the running-in experiments, and be suitable for large-scale popularization and application.
Description
Technical Field
The invention relates to the field of power equipment experiments, in particular to an intelligent running-in experiment platform for a medium-voltage circuit breaker and a control method of the intelligent running-in experiment platform.
Background
Medium voltage circuit breakers are one of the most important power switching devices in an electrical network and play a significant role in electrical distribution networks. The running-in experiment is an important ring in the new product development and production process of the medium voltage circuit breaker. Because the performance of the product in the new product research and development test stage is unstable, the frequency of the faults of breaker opening rejection, closing rejection, idle closing and the like in the running-in period is higher. Most of the existing running-in experiment tools or equipment are simple and crude, lack of necessary protection measures, need to be attended by specially-assigned persons, and lack of necessary information recording and state monitoring functions. The controller equipped with the circuit breaker has an automatic break-in function, but only a single circuit breaker can be subjected to a break-in experiment, and a circuit breaker coil and controller components are often burnt due to faults of circuit breaker opening and closing rejection in the experiment. The running-in experiment cost is high due to the high price of the controller, the long maintenance period of a manufacturer and the like.
Disclosure of Invention
In order to solve the technical problems, the invention provides an intelligent running-in experiment platform for medium-voltage circuit breakers and a control method thereof, which are used for realizing that a plurality of paths of medium-voltage circuit breakers perform specified running-in experiments on the experiment platform at the same time, and the state information of each path of medium-voltage circuit breaker is timely recorded, stored and uploaded to a monitoring terminal, so that the intelligent running-in experiment platform is unattended on site and high in safety.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a control method of intelligent running-in experiment platform of medium voltage circuit breaker, is applied to the intelligent running-in experiment platform of medium voltage circuit breaker, and this experiment platform includes check out test set, electrical power generating system, fault diagnosis system, alarm system, control system and monitored control system, control system is connected with check out test set, fault diagnosis system, monitored control system respectively, fault diagnosis system is connected with alarm system, electrical power generating system provides the power for all power consumption components, wherein:
the detection equipment is used for detecting the state of each path of medium-voltage circuit breaker and the current parameter of the motor and displaying the state and the current parameter through the touch screen; the power supply system is used for providing proper power supply voltage for each electric element in a running-in experiment;
the fault diagnosis system is used for diagnosing various faults of the medium-voltage circuit breakers in each path in the running-in experiment and sending out alarm signals;
the alarm system is used for realizing the functions of sending out sound-light alarm, sending short messages in a way of being divided into limits, displaying alarm records on a touch screen and storing the alarm records by an upper computer after receiving the alarm signals sent by the fault diagnosis system;
the control system is used for manual control and automatic control of running-in experiments of the medium-voltage circuit breakers in each path, the experiments are automatically stopped when the set times are reached during automatic control, automatic reclosing experiments of the medium-voltage circuit breakers in each path are controlled, voltage regulation of the medium-voltage circuit breakers in each path is controlled, and related parameter setting is carried out on the touch screen;
the monitoring system is used for reading and storing relevant data of running-in experiments of the medium-voltage circuit breakers of all paths through monitoring software and a wireless network, monitoring the states of the running-in experiments in real time through mobile phone app software, and being capable of remotely operating and receiving alarm short messages in real time;
the control method is realized by the following steps:
1) Selecting and regulating various voltage specifications, and controlling a voltage-adjustable power supply module of a power supply system through analog quantity to obtain a corresponding voltage value so as to drive a corresponding medium-voltage circuit breaker to act; suppose the voltage regulation range of the power module is 0~V 1 The range of the analog output module of the controller is matched with the input of the power supply module, the corresponding range data word is 0~I, and the voltage is required to be set to be V S Then the controller needs a data word I sent to the analog module S Comprises the following steps: i is S =V S *I/V 1 The data after the calculation of the upper formula needs to be subjected to truncation processing;
2) Man-machine interaction, namely setting experiment times, voltage specification selection, voltage set value and circuit breaker selection through a touch screen;
3) The method comprises the following steps of manually controlling the actions of medium-voltage circuit breakers, and manually controlling the actions of energy storage, closing and opening of a plurality of medium-voltage circuit breakers through a touch screen;
4) Recording the real-time state of each path of medium-voltage circuit breaker, recording the experiment times of each path of medium-voltage circuit breaker, the state of energy storage completion non-switching-on, energy storage completion switching-on, switching-off state non-energy storage, switching-off state energy storage, switching-on action and switching-off action of each path of medium-voltage circuit breaker, and recording and displaying the real-time state of each path of medium-voltage circuit breaker on a touch screen and upper computer monitoring software;
5) The automatic running-in experiment of the multi-path medium-voltage circuit breaker comprises the steps that cables with corresponding numbers are connected to terminals of the corresponding medium-voltage circuit breaker according to line numbers, a key for finishing wiring of the corresponding medium-voltage circuit breaker is selected on a touch screen, voltage is set, after the actions of energy storage, brake opening and brake closing are tested manually to be normal, the experiment times and action intervals are set, and the key for starting the running-in experiment is clicked, wherein the medium-voltage circuit breaker performs cyclic actions according to the sequence of energy storage → waiting → brake closing → waiting → brake opening → counting plus 1 → waiting → energy storage, and the experiment is automatically finished until the set experiment times are reached;
6) The multi-path medium-voltage circuit breaker action requests are queued, the energy storage, brake opening and closing action requests of a plurality of medium-voltage circuit breakers are queued in sequence and act in sequence according to the queuing sequence, so that the simultaneous action of the plurality of medium-voltage circuit breakers is avoided, and the impact on a power supply system is reduced;
7) According to the multi-path medium-voltage circuit breaker automatic reclosing break-in experiment, a corresponding numbered cable is connected to a corresponding medium-voltage circuit breaker terminal according to a line number, a corresponding medium-voltage circuit breaker 'wiring completion' button is selected on a touch screen, voltage is set, after the actions of energy storage, brake opening and closing are manually tested to be normal, a 'reclosing break-in experiment' option is selected, the number of times of the experiment is set, the 'break-in experiment start' button is clicked, and the medium-voltage circuit breaker circularly acts according to the sequence of energy storage → brake opening in place → waiting for 0.1 second → brake closing → detection in place → waiting for 0.3 second → brake opening → detection in place → energy storage and waiting for 180 seconds → counting plus 1 → waiting for 180 seconds → energy storage, and the experiment is automatically ended until the set number of times of the experiment are reached;
8) The method comprises the steps that current-based energy storage motor protection is carried out, whether locked rotor happens or not is judged according to the current of an energy storage motor, if locked rotor happens, a corresponding medium-voltage circuit breaker stops an experiment, power is cut off, an alarm is given, and the experiments of other medium-voltage circuit breakers are not affected;
9) The energy storage motor protection based on the energy storage duration judges whether an energy storage fault occurs or not according to the action time of the energy storage motor, if the energy storage fault occurs, the corresponding medium-voltage circuit breaker stops the experiment, cuts off the power and gives an alarm, and the experiment of the rest medium-voltage circuit breakers is not influenced;
10 Based on the protection of the closing coil of the closing action time, judging whether a closing fault occurs or not according to the closing action time, if the fault occurs, stopping the experiment of the corresponding medium-voltage circuit breaker, cutting off the power and giving an alarm, and enabling the experiment of the rest medium-voltage circuit breakers not to be influenced;
11 The opening coil protection based on the opening action time length judges whether the opening fault occurs or not according to the opening action time length, if the fault occurs, the corresponding medium-voltage circuit breaker stops the experiment, cuts off the power and gives an alarm, and the experiment of the rest medium-voltage circuit breakers is not influenced;
12 The medium voltage circuit breaker is subjected to idle switching fault diagnosis, whether an idle switching fault occurs is judged through switching-on action and switching-on in-place signal change after switching-on is completed, if the fault occurs, the corresponding medium voltage circuit breaker stops an experiment, cuts off the power and gives an alarm, and the experiments of the rest medium voltage circuit breakers are not influenced;
13 Based on the detection of the opening action time of pulse capture, the opening and closing action time length is obtained by capturing the electric signal of the opening coil with the high-speed capture function and the change of the opening signal of the main loop of the medium-voltage circuit breaker through the pulse;
14 The method) is based on OPC technology and wireless network, and remote monitoring is carried out on an upper computer and a mobile phone.
And 6), after the last action of each medium-voltage circuit breaker is finished and a specific time interval is set, sending a next action request, receiving the action request of the medium-voltage circuit breaker by the system, performing FIFO queuing according to the time sequence, wherein the action of the corresponding medium-voltage circuit breaker arranged firstly acts firstly, and after the action is finished, the next medium-voltage circuit breaker arranged secondly acts correspondingly.
In step 8), the multi-path current detection modules detect the current values of the corresponding energy storage motors in real time, the controller reads the data of the current detection modules through an MODBUS bus, and whether the corresponding energy storage motors are locked or not is judged by comparing the current values with locked-rotor thresholds.
And 9) setting energy storage action time thresholds of corresponding energy storage motors according to product models before experiments, starting timing when the energy storage motors act, and diagnosing the system as an energy storage fault when the action time is greater than the threshold.
And step 10), timing is started when a closing coil of the medium-voltage circuit breaker is electrified, and when the electrification time is more than 0.5 second, the system still does not detect a closing in-place signal, the system diagnoses a closing fault and gives an alarm.
And step 11), timing is started when the opening coil of the medium-voltage circuit breaker is electrified, and when the power-on time is more than 0.5 second, the system still does not detect an opening in-place signal, the system diagnoses an opening fault and gives an alarm.
And step 12), after the medium-voltage circuit breaker is switched on in place, a few seconds to ten and several seconds are required before switching-off action, and a switching-on signal disappears during the detection, namely, an empty switching-on fault is diagnosed.
And step 13), before the experiment, a direct-current 24V voltage signal is connected to one end of the medium-voltage circuit breaker, the other end of the main loop of the medium-voltage circuit breaker is introduced into the input end of the controller, the controller starts timing when the power of a closing coil of the medium-voltage circuit breaker is obtained, timing is stopped when a disconnection signal of the main loop is detected, and the time is the switching-off action time.
The invention discloses an intelligent run-in experiment platform of a medium-voltage circuit breaker and a control method thereof, which can be used for simultaneously carrying out automatic run-in experiments and automatic reclosing run-in experiments on multi-path medium-voltage circuit breakers of different types, protecting the experiment platform and the medium-voltage circuit breaker in multiple directions without special attendance, recording real-time state information of each path of medium-voltage circuit breaker, uploading the real-time state information to a corresponding monitoring terminal through a wireless network, diagnosing faults occurring in the experiment process and giving an alarm, realizing remote monitoring, improving the safety and the experiment efficiency of the run-in experiments of the medium-voltage circuit breaker, realizing intellectualization and informatization of the run-in experiments, having simple hardware structure and accurate software control, avoiding loss caused by hardware burnout and the like, reducing the cost of the run-in experiments and being suitable for large-scale popularization and application.
Drawings
Fig. 1 is a schematic diagram of the hardware principle of the present invention.
Detailed Description
The invention is described in detail below with reference to the following figures and specific embodiments:
as shown in fig. 1, a control method for an intelligent run-in experiment platform of a medium voltage circuit breaker is applied to the intelligent run-in experiment platform of the medium voltage circuit breaker, and includes a detection device 1, a power supply system 2, a fault diagnosis system 3, an alarm system 4, a control system 5 and a monitoring system 6, wherein the control system 5 is respectively connected with the detection device 1, the fault diagnosis system 3 and the monitoring system 6, the fault diagnosis system 3 is connected with the alarm system 4, and the power supply system 2 provides power for all power consumption components, wherein:
the detection equipment 1 is used for detecting the state of each path of medium-voltage circuit breaker and the current parameters of the motor and displaying the state and the current parameters through a touch screen;
the power supply system 2 is used for providing proper power supply voltage for each electric element in a running-in experiment;
the fault diagnosis system 3 is used for diagnosing various faults of each path of medium-voltage circuit breaker in the running-in experiment and sending out alarm signals;
the alarm system 4 is used for realizing the functions of sending out sound and light alarms, sending short messages in different rights, displaying alarm records on a touch screen and storing the alarm records by an upper computer after receiving the alarm signals sent by the fault diagnosis system 3;
the control system 5 is used for manual control and automatic control of the running-in experiment of each path of medium-voltage circuit breaker, the experiment is automatically stopped when reaching the designed times during automatic control, the automatic reclosing experiment of each path of medium-voltage circuit breaker is controlled, the voltage regulation of each path of medium-voltage circuit breaker is controlled, and related parameter setting is carried out on the touch screen;
the monitoring system 6 is used for reading and storing relevant data of running-in experiments of the medium-voltage circuit breakers of all paths through monitoring software and a wireless network, monitoring the states of the running-in experiments in real time through mobile phone app software, and being capable of remotely operating and receiving alarm short messages in real time.
The control method of the intelligent running-in experiment platform of the medium-voltage circuit breaker is realized by the following steps:
1) Selecting and regulating various voltage specifications, and controlling a voltage-adjustable power supply module of a power supply system through an analog quantity to obtain a corresponding voltage value so as to drive a corresponding medium-voltage circuit breaker to act;
2) Man-machine interaction, namely setting experiment times, voltage specification selection, voltage set value and circuit breaker selection through a touch screen;
3) The method comprises the following steps of manually controlling the actions of medium-voltage circuit breakers, and manually controlling the actions of energy storage, closing and opening of a plurality of medium-voltage circuit breakers through a touch screen;
4) Recording the real-time state of each path of medium-voltage circuit breaker, recording the experiment times of each path of medium-voltage circuit breaker, the state of energy storage completion non-switching-on, energy storage completion switching-on, switching-off state non-energy storage, switching-off state energy storage, switching-on action and switching-off action of each path of medium-voltage circuit breaker, and recording and displaying the real-time state of each path of medium-voltage circuit breaker on a touch screen and upper computer monitoring software;
5) The automatic running-in experiment of the multi-path medium-voltage circuit breaker comprises the steps that cables with corresponding numbers are connected to terminals of the corresponding medium-voltage circuit breaker according to line numbers, a key for finishing wiring of the corresponding medium-voltage circuit breaker is selected on a touch screen, voltage is set, after the actions of energy storage, brake opening and brake closing are tested manually to be normal, the experiment times and action intervals are set, and the key for starting the running-in experiment is clicked, wherein the medium-voltage circuit breaker performs cyclic actions according to the sequence of energy storage → waiting → brake closing → waiting → brake opening → counting plus 1 → waiting → energy storage, and the experiment is automatically finished until the set experiment times are reached;
6) The multi-path medium-voltage circuit breaker action requests are queued, the energy storage, brake opening and closing action requests of a plurality of medium-voltage circuit breakers are queued in sequence and act in sequence, so that the simultaneous action of the plurality of medium-voltage circuit breakers is avoided, and the impact on a power supply system is reduced;
7) The method comprises the following steps of performing automatic reclosing running-in experiments on multiple paths of medium-voltage circuit breakers, connecting cables with corresponding numbers to corresponding medium-voltage circuit breaker terminals according to limit numbers, selecting a corresponding medium-voltage circuit breaker wiring completion button in a touch screen, setting voltage, manually testing whether energy storage, switching-off and switching-on actions are normal, selecting a reclosing running-in experiment option, setting the number of times of the experiments, and performing cycle actions on the medium-voltage circuit breakers according to the sequence of energy storage → switching-off → in-place detection of switching-off → 0.1 second → detection of switching-on → in-place detection of switching-off → 0.3 second → switching-off → detection of switching-off in-place → energy storage and waiting for 180 seconds → addition of 1 → waiting for 180 seconds → energy storage until the set number of times of the experiments is reached, and automatically finishing the experiments;
8) The method comprises the steps that current-based energy storage motor protection is carried out, whether locked rotor happens or not is judged according to the current of an energy storage motor, if locked rotor happens, a corresponding medium-voltage circuit breaker stops an experiment, power is cut off, an alarm is given, and the experiments of other medium-voltage circuit breakers are not affected;
9) The energy storage motor protection based on the energy storage duration judges whether an energy storage fault occurs or not according to the action time of the energy storage motor, if the energy storage fault occurs, the corresponding medium-voltage circuit breaker stops the experiment, cuts off the power and gives an alarm, and the experiment of the rest medium-voltage circuit breakers is not influenced;
10 Based on the protection of the closing coil of the closing action time, judging whether a closing fault occurs or not according to the closing action time, if the fault occurs, stopping the experiment of the corresponding medium-voltage circuit breaker, cutting off the power and giving an alarm, and enabling the experiment of the rest medium-voltage circuit breakers not to be influenced;
11 Opening coil protection based on opening action time length, judging whether opening faults occur or not according to the opening action time length, if the faults occur, stopping the experiment of the corresponding medium-voltage circuit breaker, cutting off the power and giving an alarm, and enabling the experiments of the rest medium-voltage circuit breakers not to be influenced;
12 The medium voltage circuit breaker is subjected to idle switching fault diagnosis, whether an idle switching fault occurs is judged through switching-on action and switching-on in-place signal change after switching-on is completed, if the fault occurs, the corresponding medium voltage circuit breaker stops an experiment, cuts off the power and gives an alarm, and the experiments of the rest medium voltage circuit breakers are not influenced;
13 Based on the detection of the opening action time of pulse capture, the opening and closing action time length is obtained by capturing the electric signal of the opening coil with the high-speed capture function and the change of the opening signal of the main loop of the medium-voltage circuit breaker through the pulse;
14 The method) is based on OPC technology and wireless network, and remote monitoring is carried out on an upper computer and a mobile phone.
Different medium voltage circuit breaker models correspond control voltage different, need the experimenter to select the power that corresponds in the past to carry out the wiring, this experiment platform is integrated multiple power, operating personnel only need on the touch-sensitive screen select corresponding voltage specification can to can carry out the pressure regulating according to actual need.
Preferably, this embodimentIn the step 1), assuming that the voltage regulating range of the power supply module is 0 to V1, the range of the analog output module of the controller is matched with the input of the power supply module, the corresponding range data word is 0~I, and the voltage is required to be set to be V S Then the controller needs a data word I sent to the analog module S Comprises the following steps: I.C. A S =V S *I/V 1 And the data after the calculation of the upper formula needs to be subjected to tail truncation.
In this embodiment, the function and the experimental process of each part are specifically described below by taking an example of simultaneous experiments of 6 medium voltage circuit breakers.
The opening and closing coils of some types of circuit breakers are 24V direct current, the current of the coils is required to reach 20A instantly when the circuit breakers are opened and closed, the impact on a direct current power supply is large, and the requirement on the power supply is high. Therefore, energy storage, opening and closing operation requests of 6 medium-voltage circuit breakers need to be queued in sequence, and the simultaneous operation of multiple medium-voltage circuit breakers is avoided to reduce impact on a power supply system.
Preferably, in step 6) of this embodiment, after the previous action of each medium voltage circuit breaker is completed and a specific time interval is set, the system sends a next action request, and after receiving the action request of the medium voltage circuit breaker, the system performs FIFO queuing in time sequence, the action of the corresponding medium voltage circuit breaker that is ranked first is performed, and after the action is completed, the next middle voltage circuit breaker that is ranked next performs the corresponding action. Like this 6 medium voltage circuit breakers can carry out corresponding action according to the time sequence in proper order, both balanced every circuit breaker's experimental efficiency, reduced the impact to electrical power generating system again, play the effect to whole electrical power generating system protection.
As a preferable mode, in step 8) in this embodiment, the multiple paths of current detection modules detect current values of the corresponding energy storage motors in real time, the controller reads data of each current detection module through the MODBUS, and determines whether a corresponding energy storage motor is locked by comparing the current value with a locked rotor threshold.
Preferably, in step 9) in this embodiment, before an experiment, an energy storage operation time threshold of the corresponding energy storage motor is set according to the product model, timing is started when the energy storage motor operates, and the system diagnoses an energy storage fault when the operation time is greater than the threshold.
The closing fault is one of common faults of the medium-voltage circuit breaker, and the closing fault of the medium-voltage circuit breaker can cause the closing coil to be electrified for a long time. Because the switching-on coil is designed according to short-time electrification during design, the switching-on coil is electrified for a long time, so that the switching-on coil is burnt to cause equipment damage and even accidents.
Preferably, in step 10) of this embodiment, when the closing coil of the medium voltage circuit breaker is powered on, timing is started, and when the power-on time is longer than 0.5 seconds, the system still does not detect a closing in-place signal, the system diagnoses a closing fault and gives an alarm. The closing time of the medium-voltage circuit breaker is generally dozens of milliseconds to dozens of milliseconds and is far less than 0.5 second, and the coil cannot be burnt after being electrified for 0.5 second, so that the threshold value is more suitable.
Similarly, the opening fault is one of common faults of the medium-voltage circuit breaker, and the opening fault of the medium-voltage circuit breaker can cause the opening coil to be electrified for a long time. Because the switching-off coil is designed according to short-time electrification during design, the long-time electrification of the switching-off coil can cause the burning-off coil to cause equipment damage and even accidents.
Preferably, in step 11) of the present embodiment, when the switching-off coil of the medium voltage circuit breaker is powered on, timing is started, and when the power-on time is greater than 0.5 seconds, the system still does not detect the switching-off in-place signal, the system diagnoses the switching-off fault and gives an alarm. The opening time of the medium-voltage circuit breaker is generally dozens of milliseconds to dozens of milliseconds, which is far less than 0.5 second, and the coil cannot be burnt out when the coil is electrified for 0.5 second, so the threshold value is more suitable.
The medium-voltage circuit breaker is one of common faults due to an air-to-close fault. The idle switching-on is the condition that the medium-voltage circuit breaker performs switching-on action after receiving a switching-on instruction, and the switch bounces back to a switching-off position after reaching the switching-on position, and is one of the fault actions which should be avoided as much as possible during product design. The traditional running-in equipment has no idle-switching diagnosis function, and when the idle-switching occurs, a short-time switching-in-place signal is generated to cut off the current of a switching-in coil, so that an obvious fault of burning the coil cannot occur, and the idle-switching in the running-in experiment of a product is easy to neglect, and the experiment is continued.
Preferably, in step 12) of this embodiment, after the medium voltage circuit breaker is closed to the right position, a few seconds to ten and several seconds are left before the opening operation, and the absence of the closing signal is detected, that is, the null closing fault is diagnosed. This fault diagnosis has reminded product design and experimenter, and the product has taken place the condition of empty combined floodgate in the running-in experiment, is convenient for to the performance and the deeper understanding of function of this product.
The opening action time of the medium-voltage circuit breaker refers to the time from the opening coil being electrified to the main circuit of the circuit breaker being disconnected, and is one of important performance indexes of the medium-voltage circuit breaker. The change rule of the opening action time is detected through a running-in experiment, which is very beneficial to product design. Generally, the time for detecting the opening action needs to be manually measured by a special measuring instrument, which wastes time and labor, and the traditional running-in experimental equipment does not have the function of detecting the opening action time. In view of this, the invention designs the function of detecting the opening action time of the automatic break-in experiment.
Preferably, in step 13) of this embodiment, a direct-current 24V voltage signal is connected to one end of the medium-voltage circuit breaker before the experiment, the other end of the main circuit of the medium-voltage circuit breaker is introduced into an input end of the controller, the controller starts timing when the closing coil of the medium-voltage circuit breaker is powered on, and stops timing when the main circuit disconnection signal is detected, where the period is the switching-off operation time. Because the switching-off time is generally dozens of milliseconds to dozens of milliseconds, in order to improve the measurement accuracy, the pulse capture function of the controller is used. The system transmits the opening action time parameters to an upper computer through a 4G network for storage, and the opening action time parameters correspond to information such as experiment times one by one.
In order to facilitate the staff to master the state and data of the experiment platform in real time and facilitate the movement of the experiment platform, a remote monitoring system based on an OPC technology and a 4G network is built. The system mainly comprises a controller, a 4G wireless communication module, upper computer software, mobile phone app software, a webpage and the like. The controller in the experiment platform reads data of each current sensor through the MODBUS bus, stores the data in a specified data storage area, and reads the state of each switching value signal through the input port. The 4G wireless communication module reads data and I/O states in a storage area of the controller through a network cable, converts the processing into standard OPC interface data, and transmits the standard OPC interface data to the OPC server through a 4G network after packaging. The configuration software of the upper computer of the remote monitoring end establishes connection with the Server through the OPC Server to complete data transmission and display visual pictures on the screen of the upper computer. The remote control and data acquisition of the medium-voltage circuit breaker running-in experiment platform are realized through functions of upper computer software, variable link establishment, upper computer monitoring interface programming, process variable filing, process variable trend graph and the like, and the variable state of the experiment platform can be browsed in a webpage form. The upper computer can realize the monitoring function of the experiment platform without being connected with the experiment platform hardware, the mobile phone monitors the experiment platform in an app or webpage mode, and can receive short message notifications such as experiment completion, alarm and the like of the experiment platform in a short message mode with the right.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a control method of middling pressure circuit breaker intelligence break-in experiment platform, its characterized in that is applied to middling pressure circuit breaker intelligence break-in experiment platform, and this experiment platform includes check out test set (1), electrical power generating system (2), failure diagnosis system (3), alarm system (4), control system (5) and monitored control system (6), control system (5) are connected with check out test set (1), failure diagnosis system (3), monitored control system (6) respectively, failure diagnosis system (3) are connected with alarm system (4), electrical power generating system (2) provide the power for all power consumption components, wherein:
the detection equipment (1) is used for detecting the state of each path of medium-voltage circuit breaker and the current parameter of the motor and displaying the state and the current parameter through a touch screen; the power supply system (2) is used for providing proper power supply voltage for each electric element in a running-in experiment;
the fault diagnosis system (3) is used for diagnosing various faults of the medium-voltage circuit breakers in each path in the running-in experiment and sending out alarm signals;
the alarm system (4) is used for realizing the functions of sending sound and light alarm, sending short messages by different authorities, displaying alarm records by a touch screen and storing the alarm records by an upper computer after receiving the alarm signal sent by the fault diagnosis system (3);
the control system (5) is used for manual control and automatic control of the running-in experiment of each path of medium-voltage circuit breaker, the experiment automatically stops when the set times is reached during automatic control, the automatic reclosing experiment of each path of medium-voltage circuit breaker is controlled, the voltage regulation of each path of medium-voltage circuit breaker is controlled, and related parameter setting is carried out on the touch screen;
the monitoring system (6) is used for reading and storing relevant data of running-in experiments of the medium-voltage circuit breakers in each path through monitoring software and a wireless network, monitoring the state of the running-in experiments in real time through mobile phone app software, and being capable of remotely operating and receiving alarm short messages in real time;
the control method is realized by the following steps:
1) Selecting and regulating various voltage specifications, and controlling a voltage-adjustable power supply module of a power supply system through an analog quantity to obtain a corresponding voltage value so as to drive a corresponding medium-voltage circuit breaker to act; suppose the voltage regulation range of the power module is 0~V 1 The range of the analog output module of the controller is matched with the input of the power supply module, the corresponding range data word is 0~I, and the voltage is required to be set to be V S Then the controller needs a data word I sent to the analog module S Comprises the following steps: I.C. A S =V S *I/V 1 Wherein, the data after the upper formula calculation needs to be subjected to tail truncation;
2) Man-machine interaction, namely setting experiment times, voltage specification selection, voltage set value and circuit breaker selection through a touch screen;
3) The method comprises the following steps of manually controlling the actions of medium-voltage circuit breakers, and manually controlling the actions of energy storage, closing and opening of a plurality of medium-voltage circuit breakers through a touch screen;
4) Recording the real-time state of each path of medium-voltage circuit breaker, recording the experimental times of each path of medium-voltage circuit breaker, the energy storage process, the energy storage completion non-switching-on, the energy storage completion switching-on, the switching-off state non-energy storage, the switching-off state stored energy, the switching-on action and the switching-off action, and recording and displaying the real-time state of each path of medium-voltage circuit breaker on a touch screen and upper computer monitoring software;
5) The automatic running-in experiment of the multi-path medium-voltage circuit breaker comprises the steps that cables with corresponding numbers are connected to terminals of the corresponding medium-voltage circuit breaker according to line numbers, a key for finishing wiring of the corresponding medium-voltage circuit breaker is selected on a touch screen, voltage is set, after the actions of energy storage, brake opening and brake closing are tested manually to be normal, the experiment times and action intervals are set, and the key for starting the running-in experiment is clicked, wherein the medium-voltage circuit breaker performs cyclic actions according to the sequence of energy storage → waiting → brake closing → waiting → brake opening → counting plus 1 → waiting → energy storage, and the experiment is automatically finished until the set experiment times are reached;
6) The method comprises the following steps that (1) action requests of multiple medium-voltage circuit breakers are queued, the action requests of energy storage, brake opening and brake closing of the multiple medium-voltage circuit breakers are queued in sequence, and the medium-voltage circuit breakers act sequentially according to the queuing sequence, so that the simultaneous action of the multiple medium-voltage circuit breakers is avoided, and the impact on a power supply system is reduced;
7) According to the multi-path medium-voltage circuit breaker automatic reclosing break-in experiment, a corresponding numbered cable is connected to a corresponding medium-voltage circuit breaker terminal according to a line number, a corresponding medium-voltage circuit breaker 'wiring completion' button is selected on a touch screen, voltage is set, after the actions of energy storage, brake opening and closing are manually tested to be normal, a 'reclosing break-in experiment' option is selected, the number of times of the experiment is set, the 'break-in experiment start' button is clicked, and the medium-voltage circuit breaker circularly acts according to the sequence of energy storage → brake opening in place → waiting for 0.1 second → brake closing → detection in place → waiting for 0.3 second → brake opening → detection in place → energy storage and waiting for 180 seconds → counting plus 1 → waiting for 180 seconds → energy storage, and the experiment is automatically ended until the set number of times of the experiment are reached;
8) The method comprises the steps that current-based energy storage motor protection is carried out, whether locked rotor happens or not is judged according to the current of an energy storage motor, if locked rotor happens, a corresponding medium-voltage circuit breaker stops an experiment, power is cut off, an alarm is given, and the experiments of other medium-voltage circuit breakers are not affected;
9) The energy storage motor protection based on the energy storage duration judges whether an energy storage fault occurs or not according to the action time of the energy storage motor, if the energy storage fault occurs, the corresponding medium-voltage circuit breaker stops the experiment, cuts off the power and gives an alarm, and the experiment of the rest medium-voltage circuit breakers is not influenced;
10 Based on the protection of the closing coil of the closing action time, judging whether a closing fault occurs or not according to the closing action time, if the fault occurs, stopping the experiment of the corresponding medium-voltage circuit breaker, cutting off the power and giving an alarm, and enabling the experiment of the rest medium-voltage circuit breakers not to be influenced;
11 The opening coil protection based on the opening action time length judges whether the opening fault occurs or not according to the opening action time length, if the fault occurs, the corresponding medium-voltage circuit breaker stops the experiment, cuts off the power and gives an alarm, and the experiment of the rest medium-voltage circuit breakers is not influenced;
12 The medium voltage circuit breaker is subjected to idle switching fault diagnosis, whether an idle switching fault occurs is judged through switching-on action and switching-on in-place signal change after switching-on is completed, if the fault occurs, the corresponding medium voltage circuit breaker stops an experiment, cuts off the power and gives an alarm, and the experiments of the rest medium voltage circuit breakers are not influenced;
13 Based on the detection of the opening action time of pulse capture, the opening and closing action time length is obtained by capturing the electric signal of the opening coil with the high-speed capture function and the change of the opening signal of the main loop of the medium-voltage circuit breaker through the pulse;
14 The method) is based on OPC technology and wireless network, and remote monitoring is carried out on an upper computer and a mobile phone.
2. The method for controlling an intelligent running-in experiment platform for medium-voltage circuit breakers according to claim 1, wherein in step 6), after the previous action of each medium-voltage circuit breaker is completed and a specific time interval is set, the next action request is sent out, after the system receives the action request of the medium-voltage circuit breaker, FIFO queuing is performed according to the time sequence, the action of the corresponding medium-voltage circuit breaker which is arranged first is performed first, and after the action is completed, the corresponding action is performed again on the next medium-voltage circuit breaker which is arranged next.
3. The method for controlling the intelligent running-in experiment platform of the medium voltage circuit breaker according to claim 1, wherein in the step 8), the plurality of current detection modules detect the current values of the energy storage motors in real time, the controller reads the data of the current detection modules through an MODBUS bus, and the controller determines whether the corresponding energy storage motors are locked or not by comparing the current values with a locked-rotor threshold value.
4. The control method for the intelligent running-in experiment platform of the medium voltage circuit breaker as claimed in claim 1, wherein in step 9), before the experiment, the energy storage action time threshold of the corresponding energy storage motor is set according to the product model, timing is started when the energy storage motor acts, and the system diagnoses energy storage fault when the action time is greater than the threshold.
5. The method for controlling the intelligent break-in experimental platform of the medium voltage circuit breaker as claimed in claim 1, wherein in the step 10), timing is started when a closing coil of the medium voltage circuit breaker is powered on, and when the power-on time is longer than 0.5 seconds, the system still does not detect a closing in-place signal, the system diagnoses a closing fault and gives an alarm.
6. The control method for the intelligent break-in experiment platform of the medium voltage circuit breaker as claimed in claim 1, wherein in the step 11), when the opening coil of the medium voltage circuit breaker is powered on, timing is started, and when the power-on time is more than 0.5 seconds, the system still does not detect the opening in-place signal, the system diagnoses the opening fault and gives an alarm.
7. The method for controlling the intelligent break-in experiment platform of the medium voltage circuit breaker as claimed in claim 1, wherein in the step 12), after the medium voltage circuit breaker is closed in place, a few seconds to a dozen seconds are left before the opening operation, and the closing signal is detected to disappear, that is, the idle closing fault is diagnosed.
8. The method for controlling the intelligent running-in experiment platform of the medium voltage circuit breaker as claimed in claim 1, wherein in the step 13), before the experiment, a direct current 24V voltage signal is connected to one end of the medium voltage circuit breaker, the other end of a main loop of the medium voltage circuit breaker is introduced into an input end of the controller, the controller starts timing when a closing coil of the medium voltage circuit breaker is powered on, and the timing is stopped when a breaking signal of the main loop is detected, wherein the time is the switching-off action time.
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