RU2338210C1 - Method for controlling and recording running time of power production equipment and method to this effect - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to operation of electric power production equipment, particularly, to that used in heating systems. In compliance with the proposed invention, data on the equipment state is received and processed to output the instruction to cut in or cut out the running time increment counter. Novelty of the invention consists in that the aforesaid data is represented by the current consumed by every phase of the equipment allowing for the equipment certificate data. The running time counter readouts are compared to the certificate data on the equipment mean-time-between failures and, in case the said data exceeds the certified values, outputs a warning indication of the equipment running time served out. The transmission of the data on the total running time as well as the input of the total running time to failure and the certificate data on current consumption are effected via the modem over the GSM channel, the mobile phone being used to this end. The method is implemented by the device incorporating a microcontroller, a control unit, a display and signaling unit, a real-time clock circuit, a power supply, current pickups with the interface and modem circuitry.

EFFECT: higher-efficiency of control and recording of serviceability and life.

3 cl, 1 dwg

Description

The proposed method relates to the electric power industry, in particular to the electric power equipment used in heating systems. In the practice of operating electric power equipment to assess their resource, various methods are used to control their working condition and take into account the operating time.

The known electromechanical method of accounting for the operating time of electric power equipment [1], based on measuring the time spent by the electric power equipment in the connected state to the network. When the electric power equipment is turned on, voltage is simultaneously applied to the electromechanical unit, in which pulses are generated that control the stepper motor, the rotor of which rotates in time with each control pulse. Running hours are displayed using a mechanical indicator with several digital drums. The rotation of the rotor through the gearbox is transmitted to the first digital drum, which makes one revolution in an hour. Then a second drum, a third, etc. are rotated through the translation tribes. The number on the second drum means the number of hours on the third ten hours, etc. The main disadvantage of this method is its unreliability due to the use of mechanical gears of the movement of the rotor of the stepper motor and digital drums. In addition, this method does not take into account the state of electric power equipment, since the supply of power to it is often necessary, but insufficient sign of its performance.

The closest in technical essence and function to the claimed method and device for its implementation is an electronic way of recording the time worked by electric power equipment and recording the date and time of their on or off and accounting for the number of their on or off [2]. This method includes obtaining information on the on or off state of the electric power equipment by monitoring the voltage on the control coil of the contactor of the electric power equipment; in this case, if there is an alternating voltage of the network, an operating time counter is incremented with a time interval of 1 min, if the controlled electric power equipment is turned off, then there is no alternating voltage on the coil of the contactor, and the counter does not increment. Indication of the total operating time of electric power equipment in this method is also carried out using a remote control panel using an infrared data exchange channel. Although this electronic method is characterized by high reliability and the ability to remotely control, however, the use in this method of a sign of operability of electric power equipment by the presence of voltage on the coil of the contactor is clearly not enough. Moreover, with a three-phase mains connection, the state of two other contactor coils is not considered. Finally, the infrared remote control channel operates at a short distance and obstacles can interfere with its reliable operation.

In order to increase the efficiency of monitoring the operability of electric power equipment and taking into account its working life, a method is proposed that includes obtaining information about the working state of electric power equipment, processing it and issuing control commands to turn on or off the increment of the operating time counter, characterized in that as the information characterizing the operating state of electric power equipment, use the measured currents of consumption of each phase of the electric ergeticheskogo equipment, the issuing of control commands to switch the time counter increment developments produce only subject to compliance with operating current consumed by power equipment passport to their values for each mode of his work with deviations within the permissible limits. Otherwise, they fix the failure of the electric power equipment and turn on the alarm. In addition, the readings of the incremental counter of the total uptime are compared with its passport value of the mean time between failures of the electric power equipment and, when it is exceeded, they signal that the electric power equipment is running out of its working life. In addition, the proposed method is characterized in that the data on the total operating time of the electric power equipment, data on the mean time between failures and passport values of the current consumption of the electric power equipment are transmitted via the radio modem via the OSM channel, and a cell phone is used as a remote control panel.

Thus, the proposed method reveals new functionalities for monitoring the operability of electric power equipment and accounting for its resource, which allows us to conclude that the proposed solution meets the criterion of "significant differences".

The goal is also achieved by the fact that the device for implementing the proposed method, including a microcontroller, a control unit, an indication unit, a real-time clock circuit, a power supply unit, is characterized in that it further comprises current sensors with interface circuits and a radio modem with an interface unit, while power supply, control unit output, real-time clock circuit output, current sensors through interface circuits, are directly connected to the inputs of the microcontroller, the outputs of which are connected to the input of the display unit and through the interface unit to the radio modem, the inputs of the current sensors connected to three inputs of the device, two of which are connected to the inputs of the power supply, and three outputs of the current sensors are connected to the corresponding outputs of the device.

Such a device allows you to fully implement the proposed method for monitoring and recording the operating time of electric power equipment.

The introduction of current sensors makes it possible to measure the currents of consumption of electric power equipment for each phase, convert the measured current to digital codes and transmit them via an interface to a microcontroller for processing, and thereby use the real criterion for the working capacity of electric power equipment to measure the total operating time of its uptime.

The introduction of a radio modem enhances the functionality of the remote control, which can be used as a regular cell phone and, most importantly, significantly increase the range of the remote control.

All these signs allow you to implement objective control over the working condition of electric power equipment, ensuring the efficient use of its guaranteed working resource.

The drawing shows a structural diagram of the proposed device that implements the proposed method. The device contains (see Fig. 1) a microcontroller 1 with a power supply 13, current sensors 2, 3, 4 and interface circuits 5, 6, 7, an indication and signaling unit 8, a control unit 9, a real-time clock 10, a radio modem 11, and interface unit 12. The implementation of this device is performed according to known schemes using a microcontroller 1 type PIC16F648A from Microchip or the like. Current transformers are used as current sensors 2, 3, 4. Each interface circuit 5, 6, 7 is an ADC made on chips with a serial interface AD7893 from Analog Devices. Real-time clock 10 uses a chip, for example, DS1302 with an autonomous power source. The indicating and signaling unit 8 contains a seven-segment LED indicator for several King Bright brand familiarities and a ZP-18 piezoelectric transducer, the control unit 9 is made using PKN 150 buttons. As a radio modem 11, you can use the Sony GR-64 GSM modem by completing the pairing unit 12 on the MAXIM chip MAXIM.

Simultaneously with the inclusion of electric power equipment, voltage is supplied to the power supply unit 13 of the device. The microcontroller 1 starts working, the control program is executed, the ADCs of the interface circuit 5, 6, 7 are started, the parameters specified in the non-volatile memory of the microcontroller 1 are read in. Then the current sensors 2, 3, 4 are interrogated and the measured current values are compared with the corresponding current settings entered or using the buttons of the control unit 9 or using the remote control - a cell phone as CMC messages, If the values of the measured currents of all three phases are zero, then this means the off state If the measured currents are more than the current settings, but do not go beyond the permissible norms, the operating hours counter of the electric power equipment, implemented in the microcontroller, is turned on. In all other cases, failure of the electric power equipment is signaled both visually and by a sound signal using the display and alarm unit 8. In addition, a corresponding CMC message is transmitted via GSM channel to the cell phone number, which is used as a remote control. If the total time of uptime of the electric power equipment exceeds the passport value of the mean time between failures, entered either using the control unit 9 or using a cell phone in the form of a CMC message, the resource is depleted by the electric equipment both visually and by an audio signal using the indication and alarm unit as well as sending the corresponding CMC message via GSM channel to the cell phone number used as a remote control. This method was used in experimental verification of a prototype of a powerful electric heating installation. The operation of this electric power equipment with a large number of infrared heaters during the heating season has confirmed the high efficiency of failure detection of electric heaters. In particular, the failure of certain groups of infrared heaters that did not exhaust their life when they failed to reduce the current consumption of the electric heating installation was quickly detected.

Information sources

1 Description of running hours counters. In the section new developments and new technologies on the website www.sibindustry.ru. Or in writing: Russia, Omsk, 644046, Uchebnaya ul., 199-B, building 410; contact person: Zimina Anastasia Yuryevna; E-mail: adm@sibindustry.ru

2. Description of the principle of operation of registrar counters, designed to account for the operating hours of electric motors and other electrical units, to record the date / time of their on or off, to account for the number of on or off. SIBAVTO CJSC, 660021, Krasnoyarsk, Red Square, 5. Phone: +7 (3912) 23-55-92, on the website www.sibavtokrk.ru

Claims (3)

1. A method for monitoring and recording the operating hours of electric power equipment, which includes accounting for the total operating time of electric power equipment based on recording the moments of its on / off, date and time of its turning on / off and accounting for the number of its turning on / off, processing of these data and their indication , including on the display of the remote control, characterized in that the fixation of the moments on / off of the electric power equipment is carried out by the values of the measured current c consumed by electric power equipment, and the calculated total operating time of electric power equipment is compared with the average mean time between failures guaranteed by the manufacturer of electric power equipment, and when the total time of electric power equipment reaches mean time between failures, they include a warning signal that the electric equipment is running out of its working life, This is about the normal working condition of the electric power industry. Testing is judged by the values of currents consumed by electric power equipment for each of its phases, and the values of consumed currents are compared with the entered passport values of the current consumption of electric power equipment in one or another mode of operation, with deviations within the permissible norms, at which the failure of electric power equipment is detected and turn on the alarm. 2. The method according to claim 1, characterized in that the data on the total operating time of the electric power equipment and data on the mean time between failures and passport values of the current consumption of the electric power equipment are transmitted via a radio modem via a GSM channel, and use a cellular remote control phone. 3. A device for monitoring and recording operating hours of electric power equipment, including a microcontroller, a control unit, an indication and signaling unit, a real-time clock circuit, a power supply unit, characterized in that it further comprises current sensors with interface circuits and a radio modem connected to the microcontroller through the unit pairing, while the output of the power supply, the output of the control unit, the output of the real-time clock circuit and current sensors through the interface circuit are connected to the inputs of the microcontroller, the outputs of which connected to the input of the display and alarm unit, and the inputs of three current sensors are the corresponding three inputs of the device, two of which are connected to the inputs of the power supply, and the outputs of three current sensors are the corresponding outputs of the device.