CN102868230A - Intelligent managing device for condition based maintenance of 10-20kv transformer - Google Patents

Abstract

The invention discloses a 10-20kV transformer station area equipment state maintenance intelligent management device, which includes a transformer station area equipment operation state signal data acquisition circuit, a signal data calculation and judgment circuit and a signal communication circuit; the transformer station area equipment operation state signal The data acquisition circuit collects the operation status signals of various equipment in the equipment system of the transformer station area, and outputs them to the signal data calculation and judgment circuit. The output of the signal data calculation and judgment circuit is connected to the signal communication circuit. Smart management command center, or electrician's mobile phone. The present invention can know the abnormal operation data such as voltage, current and temperature of the power distribution device in the distribution transformer station area at any time through remote measurement and remote signaling, and can arrange maintenance in time according to the operation status of the on-site equipment, shorten the time for handling accidents, and increase the power supply , Improve the credibility of power supply companies.

Description

10~20kV Transformer Area Equipment Condition Maintenance Intelligent Management Device

technical field

The invention relates to the field of equipment condition maintenance in a transformer station area, in particular to an intelligent management device for equipment condition maintenance in a 10-20kV transformer station area.

Background technique

At present, the power system comprehensively carries out the condition-based maintenance of electrical equipment, and implements intelligent management of the condition-based maintenance of electrical equipment for the entire power grid. The application of intelligent management technology for condition-based maintenance of distribution network equipment has only just started, and has not been fully popularized and applied due to various reasons. The research on intelligent management technology for condition-based maintenance of distribution network power supply equipment is mainly aimed at distribution transformers and below 400V Power distribution system equipment. The condition-based maintenance of electrical equipment is to perform maintenance before the equipment is about to fail, so as to ensure the safe and reliable operation of electrical equipment, reduce the damage rate of electrical equipment, reduce power outage time, prolong the maintenance cycle of electrical equipment, and improve the reliability of power supply.

Currently operating 10~20kV distribution transformers, because they cannot be monitored in real time, still perform periodic maintenance, because the consequences of periodic maintenance are low power supply quality, high equipment damage rate, and low power supply reliability, which cannot meet the modern life of power users. production needs. Basically, if there is a fault, the user will notify the maintenance personnel to carry out equipment maintenance. This will take a long time to deal with the fault and have a great impact on the user's power outage. When an accident occurs in the equipment in the transformer station area, the maintenance personnel will go to the scene to repair it in time, shorten the time for handling the accident, increase the power supply, and increase the benefits of the enterprise and society. At the same time, it also plays a positive role in promoting the development of intelligent technology in power distribution system.

Contents of the invention

The object of the present invention is to provide an intelligent management device for condition maintenance of equipment in a 10-20kV transformer station area, which has low cost and high power supply reliability of the power grid.

The present invention adopts the following technical solutions: a 10~20kV transformer station area equipment status maintenance intelligent management device, including a transformer station area equipment operation state signal data acquisition circuit, a signal data calculation and judgment circuit and a signal communication circuit; the transformer station area The equipment operation state signal data acquisition circuit collects various equipment operation state signals in the equipment system of the transformer station area, and outputs them to the signal data calculation and judgment circuit, and the signal data calculation and judgment circuit output is connected to the signal communication circuit, and the signal communication circuit is connected to the distribution network Power supply equipment condition maintenance intelligent management command center, or on the electrician's mobile phone.

The data acquisition circuit of the equipment running status signal in the transformer station area includes

A transformer body temperature signal acquisition circuit for collecting the temperature of the transformer body from a temperature sensor on the transformer body, and a transformer oil level signal acquisition circuit for collecting an oil level signal from the transformer oil level sensor;

The high-voltage phase loss signal acquisition circuit, the low-voltage phase loss signal acquisition circuit, the low-voltage overvoltage signal acquisition circuit, and the low-voltage undervoltage signal acquisition circuit collect the three-phase phase voltage from the low-voltage side of the transformer and output it to the signal data calculation and judgment circuit for calculation and judgment: if If the voltage of phase 1 is normal and the voltage of phase 2 is lower than 150V, it is judged as high voltage phase loss; if the voltage of phase 2 is normal and the voltage of phase 1 is lower than 100V, it is judged as low voltage phase loss; Low-voltage overvoltage; if the 3-phase voltage is lower than 200V, it is judged as low-voltage undervoltage;

The current signal acquisition circuit of the low-voltage phase line and neutral line converts the L1, L2, L3, and N-phase currents through current transformers and load resistances to output current signals that meet the requirements;

The cable temperature signal acquisition circuit and the wire joint overtemperature signal acquisition circuit connect the temperature sensor to the cable head and the wire joint to collect the temperature data signal of the cable and the wire joint;

The power factor signal acquisition circuit collects active and reactive energy signals from active energy meters and reactive energy meters;

The low-voltage phase line grounding signal acquisition circuit collects the phase line grounding signal from the residual current protector;

The lightning arrester leakage current exceeding standard signal acquisition circuit collects the lightning arrester leakage current exceeding standard signal from the lightning arrester leakage current online detector.

The signal data calculation and judgment circuit includes a power supply circuit, an A/D conversion circuit, a data calculation and judgment circuit, and an actuator; the output of the A/D conversion circuit is connected to the data calculation and judgment circuit, and the data calculation and judgment circuit The circuit output is connected to the actuator, and the power supply circuit is respectively connected to the A/D conversion circuit, the calculation and judgment circuit, and the actuator; the output of the actuator is connected to the signal communication circuit.

The power supply circuit includes a first rectifying power supply Z1, a second rectifying power supply Z2, a first diode, a second diode, a delay circuit and a relay; the two input terminals of the first rectifying power supply Z1 are respectively connected to the first power supply, and the two output terminals are respectively connected to the anode of the first diode and ground; the two input terminals of the second rectified power supply are respectively connected to the second power supply, and the two output terminals are respectively connected to the anode of the second diode and the ground Grounding; the negative poles of the first diode and the second diode are connected to the first end of the delay circuit and one end of the normally open contact of the relay, and the other end of the normally open contact of the relay is the output end of the power circuit, and the time delay The second end of the circuit is connected to the coil of the relay, the other end of the coil is grounded, and the third end of the delay circuit is grounded.

The first power supply and the second power supply are the first phase L1, N and the third phase L3, N.

The signal communication circuit includes an optical fiber communication circuit and a wireless communication circuit;

The optical fiber communication circuit includes an optical fiber cable and an optical transmission circuit; the optical transmission circuit converts the electrical signal of the operation status of the equipment in the transformer station area into an optical signal and transmits it to the distribution network power supply equipment state maintenance intelligent management command center through the optical fiber cable ;

The wireless communication circuit includes a signal input circuit, an encoding circuit, and a transmitting circuit; the output of the signal input circuit is connected to the encoding circuit, and the encoding circuit is connected to the transmitting circuit, and an alarm signal is transmitted to the distribution network power supply equipment status maintenance intelligence Management command center, or electrician mobile phone.

The present invention uses advanced computer and electronic technology to develop an intelligent management system for the accidents in the operation of distribution transformer equipment. The technology is advanced, the design is reasonable, and ideally realizes the intelligence of the condition maintenance of distribution transformer equipment. The intelligent management will play an active role in guaranteeing the safe operation of the power grid. The specific advantages of the intelligent management device for condition maintenance of equipment in the distribution transformer station area are as follows:

The present invention can know the abnormal operation data such as voltage, current and temperature of the power distribution device in the distribution transformer station area at any time through remote measurement and remote signaling, and can arrange maintenance in time according to the operation status of the on-site equipment, shorten the time for handling accidents, and increase the power supply , improve the credibility of power supply enterprises;

The invention strengthens the safe operation management of the distribution network, greatly improves the reliability of power supply, improves the overall level of safety management of the distribution network, improves the power supply enterprises and social and economic benefits, and at the same time contributes to the intelligent technology development of the power distribution system also play a positive role in promoting.

Description of drawings

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

Fig. 2 is the functional block diagram of signal data calculation and judgment circuit;

Fig. 3 is the principle diagram of power supply circuit;

Figure 4 is a functional block diagram of the wireless communication circuit.

Detailed ways

As shown in Figure 1, a 10-20kV transformer station area equipment status maintenance intelligent management device of the present invention includes a transformer station area equipment operation state signal data acquisition circuit, a signal data calculation and judgment circuit, and a signal communication circuit; the transformer station area The equipment operation state signal data acquisition circuit collects various equipment operation state signals in the equipment system of the transformer station area, and outputs them to the signal data calculation and judgment circuit, and the signal data calculation and judgment circuit output is connected to the signal communication circuit, and the signal communication circuit is connected to the distribution network Power supply equipment condition maintenance intelligent management command center, or on electrician's mobile phone.

The described data acquisition circuit for the operation state signal of the equipment in the transformer station area includes a transformer body temperature signal acquisition circuit for acquiring the temperature of the transformer body from the temperature sensor on the transformer body, and a transformer oil level signal acquisition circuit for acquiring the oil level signal from the transformer oil level sensor ;

The high-voltage phase loss signal acquisition circuit, the low-voltage phase loss signal acquisition circuit, the low-voltage overvoltage signal acquisition circuit, and the low-voltage undervoltage signal acquisition circuit collect the three-phase phase voltage from the low-voltage side of the transformer and output it to the signal data calculation and judgment circuit for calculation and judgment: if If the voltage of phase 1 is normal and the voltage of phase 2 is lower than 150V, it is judged as high voltage phase loss; if the voltage of phase 2 is normal and the voltage of phase 1 is lower than 100V, it is judged as low voltage phase loss; Low-voltage overvoltage; if the 3-phase voltage is lower than 200V, it is judged as low-voltage undervoltage;

The current signal acquisition circuit of the low-voltage phase line and neutral line converts the L1, L2, L3, and N-phase currents through current transformers and load resistances to output current signals that meet the requirements;

The cable temperature signal acquisition circuit and the wire joint overtemperature signal acquisition circuit connect the temperature sensor to the cable head and the wire joint to collect the temperature data signal of the cable and the wire joint;

The power factor signal acquisition circuit collects active and reactive energy signals from active energy meters and reactive energy meters;

The low-voltage phase line grounding signal acquisition circuit collects the phase line grounding signal from the residual current protector;

The lightning arrester leakage current exceeding standard signal acquisition circuit collects the lightning arrester leakage current exceeding standard signal from the lightning arrester leakage current online detector. The signal output terminals of each acquisition circuit are output to the signal data calculation and judgment circuit for calculation and judgment.

As shown in Figure 2, the signal data calculation and judgment circuit includes a power supply circuit, an A/D conversion circuit, a data calculation and judgment circuit, and an actuator; the output of the A/D conversion circuit is connected to the data calculation and judgment circuit, The output of the data calculation and judgment circuit is connected to the executive element, and the power supply circuit is respectively connected to the A/D conversion circuit, calculation and judgment circuit, and the executive element; the output of the executive element is connected to the signal communication circuit. As shown in Figure 3, the described power supply circuit includes a first rectified power supply Z1, a second rectified power supply Z2, a first diode D1, a second diode D2, a delay circuit S and a relay; the first The two input terminals of the rectified power supply Z1 are respectively connected to the first power supply (L1, N), and the two output terminals are respectively connected to the anode of the first diode D1 and the ground; the two input terminals of the second rectified power supply Z2 are respectively connected to the second Two power supplies (L3, N), the two output terminals are respectively connected to the anode of the second diode D2 and the ground; the cathodes of the first diode D1 and the second diode D2 are both connected to the first delay circuit S end and one end of the relay normally open contact K1, the other end of the relay normally open contact K1 is the output end of the power circuit, the second end of the delay circuit S is connected to the coil K of the relay, the other end of the coil K is grounded, and the second end of the delay circuit S Three terminals are grounded. The power supply circuit adopts the parallel connection mode of rectifying power supply Z1 and rectifying power supply Z2. The input ends of the two rectifying power supplies are respectively connected to L1, N phase and L3, N phase, that is, on both sides of the phase, to improve reliability. When the device is running, the line reclosing action will delay the closing through the delay circuit and disconnect it instantaneously, so as to avoid the failure of the device and improve the operation reliability of the device. After the device is put into operation, the equipment in the transformer station area is powered off for maintenance, and then the power transmission is operated to ensure the normal operation of the device through the delay circuit.

The signal communication circuit includes an optical fiber communication circuit and a wireless communication circuit; the optical fiber communication circuit includes an optical fiber cable and an optical transmission circuit; the optical transmission circuit converts the electrical signal of the operating state of the transformer station area equipment into an optical signal Transmit to the distribution network power supply equipment status maintenance intelligent management command center through optical fiber cable; As shown in Figure 4, the described wireless communication circuit includes a signal input circuit, a coding circuit, and a transmitting circuit; circuit, and the encoding circuit is connected to the transmitting circuit, and the transmitting alarm signal is sent to the intelligent management command center for state maintenance of power supply equipment in the distribution network, or to the electrician's mobile phone.

The data acquisition circuit for the operation status signal of the equipment in the transformer station area is installed on the low-voltage side of the distribution transformer. When some abnormality occurs in the equipment in the distribution transformer station area in operation, the abnormal signal is immediately transmitted to the signal data calculation and judgment circuit for calculation and judgment processing Afterwards, the signal is immediately transmitted to the distribution network power supply equipment status maintenance intelligent management command center through the signal communication circuit, or the electrician's mobile phone. The on-duty personnel will go to the scene for maintenance immediately after receiving the alarm situation, which can shorten the processing time of the accident and improve power supply.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (6)

1. 10 ~ 20kV transformer platform area equipment state overhauling intelligent management apapratus is characterized in that: comprise that transformer platform area equipment running status signal data acquisition circuit, signal data calculate decision circuitry and signal telecommunication circuit; Described transformer platform area equipment running status signal data acquisition circuit gathers various device operating state signal in the transformer platform area device systems, output to described signal data and calculate decision circuitry, signal data calculates decision circuitry output and connects described signal telecommunication circuit, and the signal telecommunication circuit connects on supplying power allocation equipment state overhauling intelligent management command centre or the electrician's mobile phone.

2. 10 ~ 20kV transformer platform area equipment state overhauling intelligent management apapratus according to claim 1, it is characterized in that: described transformer platform area equipment running status signal data acquisition circuit comprises

Temperature sensor gathers the transformer body temperature signal collection circuit of transformer body temperature, gathers the transformer oil level signal acquisition circuit of oil level signal from the transformer oil level sensor from the transformer body;

High voltage phase loss signal acquisition circuit, low pressure default phase signal Acquisition Circuit, low pressure overvoltage signal acquisition circuit, the under-voltage signal acquisition circuit of low pressure, export to signal data calculating decision circuitry from the phase voltage of step down side collection three-phase and calculate judgement: if 1 phase voltage is normal, 2 phase voltages are lower than below the 150V, then are judged as high voltage phase loss; If 2 phase voltages are normal, 1 phase voltage is lower than below the 100V, then is the low pressure phase shortage; If 3 phase voltages are higher than 240V, be judged as the low pressure overvoltage; If 3 phase voltages are lower than 200V, be judged as the low pressure under voltage;

Low pressure phase line, neutral line current signal acquisition circuit are exported satisfactory current signal with L1, L2, L3, N phase current after current transformer and load resistance conversion;

Cable temperature signal acquisition circuit, terminal overtemperature signal acquisition circuit are connected in temperature sensor and gather cable, terminal temperature data signal on described cable end, the terminal;

The power factor signal acquisition circuit,, reactive energy signal meritorious from active electric energy meter, reactive energy-meter collection;

The low voltage phase line earthing signal acquisition circuit gathers the phase line grounding signal from residual current operated protective device;

The leakage current of an arrester signal acquisition circuit that exceeds standard gathers the leakage current of an arrester signal that exceeds standard from leakage current of an arrester thread detector.

3. 10 ~ 20kV transformer platform area equipment state overhauling intelligent management apapratus according to claim 1 is characterized in that: described signal data calculates decision circuitry and comprises that power circuit, A/D translation circuit, data calculate decision circuitry, executive component; Described A/D translation circuit output connects described data and calculates decision circuitry, and described data are calculated decision circuitry output and connected described executive component, and power circuit connects respectively described A/D translation circuit, calculates decision circuitry, executive component; Described executive component output connects the signal telecommunication circuit.

4. 10 ~ 20kV transformer platform area equipment state overhauling intelligent management apapratus according to claim 3, it is characterized in that: described power circuit comprises the first rectifier power source Z1, the second rectifier power source Z2, the first diode, the second diode, delay circuit and relay; Two inputs of described the first rectifier power source Z1 connect respectively the first power supply, and two outputs connect respectively the first diode cathode and ground connection; Two inputs of described the second rectifier power source connect respectively second source, and two outputs connect respectively the second diode cathode and ground connection; The negative pole of described the first diode and the second diode all connects first end and relay normally open contact one end of delay circuit, the relay normally open contact other end is the output of power circuit, the coil of the second relay termination of delay circuit, coil other end ground connection, delay circuit the 3rd end ground connection.

5. 10 ~ 20kV transformer platform area equipment state overhauling intelligent management apapratus according to claim 4, it is characterized in that: described the first power supply and second source are first-phase L1, N and third phase L3, N.

6. 10 ~ 20kV transformer platform area equipment state overhauling intelligent management apapratus according to claim 1, it is characterized in that: described signal telecommunication circuit comprises optical fiber communication circuit, radio communication circuit;

Described optical fiber communication circuit comprises fiber optic cables, optical transmission circuit; Described optical transmission circuit changes the signal of telecommunication of transformer platform area equipment running status into light signal and is transmitted to supplying power allocation equipment state overhauling intelligent management command centre by fiber optic cables;

Described radio communication circuit comprises signal input circuit, coding circuit, radiating circuit; Described signal input circuit output connects described coding circuit, and coding circuit connects described radiating circuit, and the emission alarm signal is passed on supplying power allocation equipment state overhauling intelligent management command centre or the electrician's mobile phone.

Images