CN103501046A - On-line anti-misoperation voice alarm system based on transformer substation measuring and control device - Google Patents

Abstract

An online anti-misoperation voice alarm system based on a substation measurement and control device. It includes a monitoring module, a communication module and an alarm module connected to each other; the monitoring module includes: monitoring controller, memory, man-machine interface, monitoring background, A/D conversion, analog input circuit, switch input, switch input circuit, Remote control, remote control relay, blocking control, blocking relay, blocking node, switching value sensor and switching value processor; among them: the monitoring controller is composed of DSP digital processor chip, respectively connected with memory, man-machine interface, A/D conversion, The switching value input, the remote control and the lock control are connected together, and connected with the communication module. The online anti-misoperation voice alarm system based on the substation measurement and control device provided by the present invention has the function of online anti-misoperation locking, and can also provide voice prompts, so as to provide reliable and accurate information for operators and maintenance personnel, so as to ensure the smooth and safe operation of anti-misoperation conduct.

Description

An online anti-misoperation voice alarm system based on substation measurement and control device

technical field

The invention belongs to the technical field of high-voltage power transmission and transformation control, and in particular relates to an online anti-misoperation voice alarm system based on a substation measurement and control device.

Background technique

The function of the anti-misoperation device is to prevent misoperation and meet the five prevention requirements of preventing accidental closing of the circuit breaker, preventing closing of the switch with load, preventing closing of the switch with ground wire, preventing live wire from hanging the ground wire, and preventing accidental entry into the active interval , it is an important content of substation operation management. At present, the commonly used anti-misoperation locking methods in substations include mechanical locking, electrical circuit locking, microcomputer anti-misoperation locking, monitoring and five-prevention integrated locking methods, etc.

The mechanical locking realizes the control of the logic through the exchange of keys and the mechanical locking between the linkages of the mechanism. There is no wiring connection or electrical node, and all the mechanical connections are used to realize the anti-misoperation locking, which can only be used in the integrated isolating switch. It is realized between the main knife and the ground knife or in a complete set of switch cabinets, and the locking between separately arranged equipment cannot be realized.

The electrical anti-misoperation locking circuit is a field electrical interlocking technology, and the locking is mainly realized through the connection of auxiliary nodes of related equipment. This is the most basic form of electrical locking, and the locking is reliable. However, this method needs to connect a large number of secondary cables, the wiring method is more complicated, and the operation and maintenance are more difficult.

The microcomputer anti-misoperation operating system generally does not directly use the auxiliary nodes of the field equipment, but it needs to be connected through the wiring of the system itself, and the anti-misoperation locking is realized through the microcomputer software rule library of the anti-misoperation operating system and on-site locks.

Among them, the microcomputer anti-misoperation locking system is widely used in the power system. The microcomputer anti-misoperation locking system is mainly composed of three parts: the anti-misoperation host, computer keys and on-site locks. However, the microcomputer anti-misoperation locking system cannot obtain the location information of the on-site equipment in real time, and cannot prevent "running out of the program". The switching of operation modes is too frequent, which increases the burden of operation and maintenance, and has certain operational safety hazards. Chinese patent ZL200810023823.0 discloses a technology for realizing the anti-misoperation locking function of the substation in the measurement and control device of the substation. This invention utilizes the real-time information of the whole substation in the measurement and control device of the substation bay layer to realize the anti-misoperation locking function of remote control operation, and realizes all remote operations And the anti-mistake locking logic judgment of the local manual operation, the anti-mistake protection is comprehensive; the anti-misoperation locking function and sequence control function technology of the local manual KK handle operation are realized, but the anti-misoperation locking function of the present invention cannot be realized online.

Chinese patent ZL200920256302.X discloses an online anti-mislocking device. The device is connected in series to the monitoring anti-mis-locking node and the measurement and control anti-mis-locking node in the control loop of the equipment. The monitoring anti-mis-locking node is controlled by the monitoring background. The anti-misoperation blocking node is independently controlled by the measurement and control device, so that real-time online anti-misoperation blocking is realized, making the substation anti-misoperation more complete and reliable, but the new anti-misoperation blocking function is realized outside the measurement and control device, which increases the equipment The quantity affects the working efficiency of the substation.

The above-mentioned substation online anti-error locking device has the following defects at the same time. It cannot provide accurate information, causing operators to go to the wrong interval, and maintenance personnel to climb live equipment by mistake and cause major accidents.

All in all, a technical problem that needs to be urgently solved by those skilled in the art is: how to realize the online anti-misoperation locking function in the measurement and control device, and at the same time provide voice prompts to provide reliable and accurate information for operators and maintenance personnel, so as to ensure the smooth operation of anti-misoperation Do it safely.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide an online anti-misoperation voice alarm system based on a substation measurement and control device.

In order to achieve the above object, the online anti-misoperation voice alarm system based on the substation measurement and control device provided by the present invention includes: a monitoring module, a communication module and an alarm module;

The monitoring module includes: monitoring controller, memory, man-machine interface, monitoring background, A/D conversion, analog input circuit, switch input, switch input circuit, remote control, remote control relay, lock control, lock relay, lock node , switch sensor and switch processor; wherein: the monitoring controller is composed of a DSP digital processor chip, which is respectively connected with memory, man-machine interface, A/D conversion, switch input, remote control, and lock control, and is connected with Communication module connection;

The human-machine interface is a human-computer interaction interface, which is connected with the monitoring background;

The monitoring background is connected with the switching value processor, which is mainly used to monitor the blocking situation of the substation;

A/D is converted into an analog-to-digital converter, which is connected with an analog input circuit;

The analog input circuit is an analog signal input shaping and filtering circuit, and its input terminal is used to receive the AC input signal;

The switch value input is a switch value signal acquisition circuit, which is connected with the switch value input circuit;

The switching value input circuit is a switching signal input shaping filter circuit, and its input terminal is used to receive the switching value input signal;

The remote control is a remote control relay driving circuit, which is connected with the remote control relay;

The locking control is a locking relay driving circuit, which is connected with the locking relay;

The switch value sensor is a switch state detection device, which is connected with the switch value processor;

The switching value processor is a switching signal acquisition circuit, which is connected with the monitoring background, and is used to collect the state signal of the blocking node through the switching value sensor, and transmit it to the monitoring background;

The communication module is a communication control module, which is connected with the monitoring controller and used for communicating with other monitoring devices;

The alarm module is a voice alarm device, which is connected with the monitoring background and used to output voice alarm signals.

The alarm module is composed of a voice chip, an amplifying circuit and a loudspeaker.

The voice chip adopts WTV170; the amplifier circuit between the voice chip and the loudspeaker adopts LM3886.

A single-pole double-throw switch is arranged inside the monitoring background, which is used to select the voice prompt content of the alarm signal.

The A/D conversion uses the AD7658 chip.

The switch sensor uses a current sensing switch FCS003.

The memory is a rewritable non-volatile memory used for storing anti-mislocking information.

The online anti-misoperation voice alarm system based on the substation measurement and control device provided by the present invention has the function of on-line anti-misoperation locking, and can also provide voice prompts, so as to provide reliable and accurate information for operators and maintenance personnel, so as to ensure the smooth and safe operation of anti-misoperation conduct.

Description of drawings

Fig. 1 is a schematic structural diagram of an online anti-misoperation voice alarm system based on a substation measurement and control device provided by the present invention.

Detailed ways

The online anti-misoperation voice alarm system based on the substation measurement and control device provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the online anti-misoperation voice alarm system based on the substation measurement and control device provided by the present invention includes a monitoring module 1, a communication module 2 and an alarm module 3;

Monitoring module 1 includes: monitoring controller 101, memory 102, man-machine interface 103, monitoring background 104, A/D conversion 105, analog input circuit 106, switch input 107, switch input circuit 108, remote control 109, remote control Relay 110, blocking control 111, blocking relay 112, blocking node 113, switching value sensor 114 and switching value processor 115; Wherein: monitoring controller 101 is the control core of this device, and it is made of DSP digital processor chip, and respectively Memory 102, man-machine interface 103, A/D conversion 105, switch input 107, remote control 109, lock control 111 are connected and connected with communication module 2;

The memory 102 is a memory chip for providing storage space for the monitoring controller 101;

The man-machine interface 103 is a man-machine interaction interface, through which the user issues various instructions and understands various information, which is connected to the monitoring background 104;

The monitoring background 104 is connected with the switching value processor 115, which is mainly used to monitor the blocking situation of the substation;

The A/D conversion 105 is an analog-to-digital converter, which is connected with the analog input circuit 106;

The analog input circuit 106 is an analog signal input shaping and filtering circuit, and its input terminal is used to receive the AC input signal;

The switching value input 107 is a switching value signal acquisition circuit, which is connected with the switching value input circuit 108;

The switching value input circuit 108 is a switching signal input shaping filter circuit, and its input terminal is used to receive the switching value input signal;

The remote control 109 is a remote control relay drive circuit, which is connected with the remote control relay 110;

The remote control relay 110 is a remote control action output relay, which outputs the remote control action through the remote control node, and controls its on-off when the substation is locked;

The locking control 111 is a locking relay driving circuit, which is connected with the locking relay 112;

The locking relay 112 is the anti-misoperation locking action relay of the device, which outputs the locking action through the locking node 113;

The blocking node 113 is the anti-misoperation blocking node of the blocking relay 112. When the blocking node 113 is closed, the electric equipment controlled by it can operate normally. When the blocking node 113 is disconnected, the electric equipment controlled by it will be blocked and cannot be operated;

The switch sensor 114 is a switch state detection device, which is connected with the switch processor 115;

The switching value processor 115 is a switching signal acquisition circuit, which is connected with the monitoring background 104 and is used to collect the status signal of the blocking node 113 through the switching value sensor 114 and transmit it to the monitoring background 104 .

The communication module 2 is a communication control module, which is connected with the monitoring module 1 and used for communicating with other monitoring devices;

The alarm module 3 is a voice alarm device, which is connected with the monitoring background 104 and used for outputting a voice alarm signal.

The alarm module 3 is composed of a voice chip, an amplifier circuit and a loudspeaker.

The measurement and control device adopts the advanced industrial field bus CAN for communication, and the measurement and control devices of different interval layers adopt the modbus communication protocol for information sharing, and a protocol for improving transmission reliability is added in the application layer.

The measurement and control device uses the status signal and electrical quantity of the field equipment to judge the prevention of misoperation.

The measurement and control device continuously collects the communication volume and state quantity. After the detected signal changes, it immediately sends the change information to the relevant device through the industrial bus, so that the relevant device can update the information needed to prevent misoperation in time.

The AC quantity is transmitted to the A/D converter 105 after isolation conversion and filter drive processing, and then reaches the monitoring controller 101; the state quantity is transmitted to the controller 101 as a switch input through optocoupler isolation processing;

The remote control quantity is controlled by the monitoring controller 101 and then output through the remote control relay 110; the remote control function is often used for closing and opening of circuit breakers and capacitors and other occasions that can be controlled by relays.

The monitoring controller 101 performs anti-misjudgment according to the semaphore of the equipment state, and performs blocking control, and controls the opening and closing of the blocking node 113 through the blocking relay 112, and the blocking node 113 transmits the signal to the switching value sensor 114;

The output signal of the switching value sensor 114 is sent to the monitoring background 104 after being processed by the switching value processor 115,

A single-pole double-throw switch is provided inside the monitoring background 104 for selecting the voice prompt content of the alarm signal.

The A/D converter 105 uses the AD7658 chip, which is manufactured by ADI, a highly integrated, six-channel 16-bit successive approximation (SAR) ADC, and contains a 2.5V reference voltage source and a reference buffer. It has the characteristics of low power consumption and fast conversion speed; AD7658 has six conversion channels divided into three groups of two channels, which can be controlled by the VA/VB/VC field of the ONVST-A/B/C pin control register. For AD conversion channels, the number of read data should be set according to the number of AD conversion channels.

The switch sensor 114 adopts a current sensing switch FCS003; when the input is 1-50A, the switch is turned on, the hysteresis is <1%, the working temperature is -30 to +70°C, the working humidity is 0-95% without condensation, and the preset value is 1Amps , Self-extinguishing material ABS (Cycolac94V-0), height x width x thickness 70x89x28mm, switch rating 240VAC2.5Amps, maximum leakage current <1mA, through the heart AC current 1-50Amps continuous.

The voice chip adopts WTV170, and the sampling frequency is 6KHZ. WTV voice chip is a powerful one-time programmable voice chip. When the voice is 6K sampling frequency, the storage length can reach 20 seconds, 40 seconds, 80 seconds, 170 seconds, 340 seconds, and the audio output is in PWM or DAC mode. Optional control modes include key control mode, key combination control mode, parallel port control mode, serial port control mode, etc. The trigger mode of the key control mode is flexible; in the serial port mode, the volume can be controlled, the power amplifier can be turned on or off, and there are loop playback and stop functions. Cycle, with many unit circuits, and has a strong programmability, in addition to being able to play voice.

The amplifying circuit between the voice chip and the loudspeaker adopts LM3886, and its output power is relatively large, and the maximum continuous undistorted average power can reach 68W under the rated working voltage. The function of automatically resisting the current impact when switching on and off enables the speaker to work safely. Its characteristics are: large output power, low distortion, and protection functions (including overvoltage protection, overheat protection, current limit, temperature limit, and switching power supply. The speaker impact protection, squelch function) complete, few peripheral components, easy production and debugging, stable and reliable work, LM3886TF can reach 68W continuous average power at VCC=VEE=28V, 4 ohm load, at VCC=VEE=35V, It can reach an average power of 50W when the load is 8 ohms. Wide power supply voltage range VCC+VEE is 20V-94V; total harmonic distortion + noise: 60W20Hz<F; slew rate (SLEW RATE): VIN=2.0VP-P, tRISE=2ns when the value is 19V/us , Total quiescent current: 50mA Input bias current: 0.2uA Gain bandwidth product: 8MHZ.

The memory 102 is a rewritable DSP memory for storing anti-mislocking information.

The working process of the online anti-misoperation voice alarm system based on the substation measurement and control device provided by the present invention: the measurement and control device makes a judgment on the locking according to the equipment state quantity and electrical quantity, and if it operates normally, the monitoring background performs a simulation operation on the operation sequence according to the actual operation rules , after all the operation simulations are successful, the monitoring background closes the monitoring anti-mislocking node through the measurement and control device, and the equipment can work. The device sends out voice prompts for the name and number of the interval it is in, to prevent the operator from going to the wrong interval; if the simulated operation cannot be successfully performed, the monitoring anti-mistake blocking node is not closed, and the device cannot be operated. At this time, the SPDT switch is turned to the other side , the alarm issued a voice prompt of "the equipment is live, please do not climb".

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (7)

1. An online anti-misoperation voice alarm system based on a substation measurement and control device, characterized in that: it includes: a monitoring module (1), a communication module (2) and an alarm module (3); The monitoring module (1) includes: monitoring controller (101), memory (102), man-machine interface (103), monitoring background (104), A/D conversion (105), analog input circuit (106), switching value Input (107), switch value input circuit (108), remote control (109), remote control relay (110), lock control (111), lock relay (112), lock node (113), switch sensor (114) and Switching value processor (115); wherein: the monitoring controller (101) is composed of a DSP digital processor chip, which is connected with the memory (102), man-machine interface (103), A/D conversion (105), switching value input ( 107), remote control (109), locking control (111) are connected, and connected with the communication module (2); The man-machine interface (103) is a man-machine interaction interface, which is connected to the monitoring background (104); The monitoring background (104) is connected with the switching value processor (115), which is mainly used to monitor the locking situation of the substation; The A/D conversion (105) is an analog-to-digital converter, which is connected to the analog input circuit (106); The analog input circuit (106) is an analog signal input shaping filter circuit, and its input terminal is used to receive the AC input signal; The switching value input (107) is a switching value signal acquisition circuit, which is connected with the switching value input circuit (108); The switching value input circuit (108) is a switching signal input shaping filter circuit, and its input terminal is used to receive the switching value input signal; The remote control (109) is a remote control relay drive circuit, which is connected with the remote control relay (110); The locking control (111) is a locking relay driving circuit, which is connected with the locking relay (112); The switch sensor (114) is a switch state detection device, which is connected with the switch processor 115; The switching value processor (115) is a switching signal acquisition circuit, which is connected with the monitoring background (104), and is used to collect the status signal of the blocking node (113) through the switching value sensor (114), and transmit it to the monitoring background (104) ; The communication module (2) is a communication control module, which is connected with the monitoring controller (101) and used for communicating with other monitoring devices; The alarm module (3) is a voice alarm device, which is connected with the monitoring background (104) and used for outputting voice alarm signals. 2. The online anti-misoperation voice alarm system based on the substation measurement and control device according to claim 1, characterized in that: the alarm module (3) is composed of a voice chip, an amplifier circuit and a speaker. 3. The online anti-misoperation voice alarm system based on the substation measurement and control device according to claim 2, characterized in that: the voice chip is WTV170; the amplifier circuit between the voice chip and the speaker is LM3886. 4. The online anti-misoperation voice alarm system based on the substation measurement and control device according to claim 1, characterized in that: the monitoring background (104) is provided with a single-pole double-throw switch inside, which is used to select the voice of the alarm signal Prompt content. 5. The online anti-misoperation voice alarm system based on substation measurement and control device according to claim 1, characterized in that: said A/D conversion (105) uses AD7658 chip. 6. The online anti-misoperation voice alarm system based on the substation measurement and control device according to claim 1, characterized in that: the switch sensor (114) adopts a current sensing switch FCS003. 7. The online anti-misoperation voice alarm system based on substation measurement and control device according to claim 1, characterized in that: the memory (102) is a rewritable non-volatile memory for storing anti-misoperation locking information .

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