CN208623654U - Distribution network terminal with anti-tampering investment design - Google Patents

Abstract

The utility model provides a kind of distribution network terminal with anti-tampering investment design, including CPU core core module, telemetry module, remote signal module and remote control module, it is characterized in that, the remote signal module includes the anti-high-frequency interferencing circuit of magnetic bead, two-stage low-pass wave circuit, it divides the reversal of diode and protects circuit, light-coupled isolation conversion circuit, after external analog quantity of state filters out high-frequency interferencing signal by magnetic bead anti-clutter circuit, it is input to two-stage low-pass wave circuit and carries out low-pass filtering, then after partial pressure reversal of diode protection circuit carries out partial pressure protection, analog-to-digital conversion is carried out through light-coupled isolation conversion circuit again, it is input to the port I/O of CPU core core module.The utility model effective solution signal interference of input state amount, can be widely applied to distribution network terminal field.

Description

Distribution network terminal with anti-tampering investment design

Technical field

The utility model relates to power transmission technology fields, and in particular to there is one kind remote signalling state to input anti-tampering stabilization Dynamic distribution network terminal.

Background technique

Distribution automation is State Grid's System Development direction, to the operation of power grid carry out real-time monitoring, fault location and The strong safeguards of offers such as isolation.Distribution automation remote terminal is that State Grid's system carries out parameters of electric power on power grid The equipment of real-time monitoring and control, communicates with power distribution automation main station, provides distribution system operating condition and various parameters, including Parameter etc. when switch state, electrical energy parameter, phase-to phase fault, ground fault and failure, and execute the life that distribution main website issues It enables, controller switching equipment is adjusted and is controlled, realize the function such as fault location, Fault Isolation and non-faulting region fast recovery of power supply Energy.When remote signalling state inputs, the message of main website is reported to there is the case where malfunction, greatly may be very that remote signalling investment signal is disturbed Caused by, remote signalling investment signal is disturbed to bring state to report by mistake to distribution main website, it often will cause distribution control accident, because This, needs to propose that one kind can be with the distribution network terminal of anti-interference anti-remote signalling state waggling, to solve the Yi Beigan of remote signalling investment signal The problem of disturbing.

Utility model content

For the actual demand for adapting to power transmission technology field, the utility model overcomes the shortcomings of the prior art, institute Technical problems to be solved are to provide a kind of distribution network terminal with anti-tampering investment design.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows: there is one kind anti-tampering investment to set The distribution network terminal of meter, including CPU core core module, telemetry module, remote signal module and remote control module, the remote signal module include magnetic bead Anti- high-frequency interferencing circuit, two-stage low-pass wave circuit, the partial pressure reversal of diode protect circuit, light-coupled isolation conversion circuit, external After emulation mode amount filters out high-frequency interferencing signal by magnetic bead anti-clutter circuit, it is input to two-stage low-pass wave circuit and carries out low pass Filtering, then after partial pressure reversal of diode protection circuit carries out partial pressure protection, then through light-coupled isolation conversion circuit progress modulus Conversion, is input to the port I/O of CPU core core module.

The anti-high-frequency interferencing circuit of magnetic bead includes magnetic bead CZ and switch K1, and the two-stage low-pass wave circuit includes resistance R1, capacitor C1, resistance R2 and capacitor C2, the partial pressure reversal of diode protection circuit includes resistance R3 and diode D17, described Light-coupled isolation conversion circuit includes that one end of optocoupler Q1, resistance R4 and resistance R5, the switch K1 and the anode of DC voltage connect It connects, the other end is connect with the input terminal of magnetic bead CZ1, and external analog quantity of state is inputted by the division of the switch K1, magnetic bead CZ1 Output end connect with one end of resistance R1, the other end of resistance R1 connects the cathode of DC voltage, resistance R2 after capacitor C1 The both ends of capacitor C1 are connected in parallel on after being connected in series with capacitor C36, resistance R3 is connected in parallel on the both ends of capacitor C36, diode D17 reversal connection The both ends of resistance R3 are connected in parallel on, optocoupler Q1 inputs the cathode of cathode connecting diode D17, input cathode connection diode D17's Anode, output cathode connect DC voltage electrode, and output negative pole is grounded after resistance R4, and output negative pole connects after resistance R5 The port I/O of CPU core core module.

The model BLM31PG500SN1L, the resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 of the magnetic bead Resistance value be respectively as follows: 1K Ω, 1K Ω, 1K Ω, 4.71K Ω, 4.7K Ω, the capacitor C1, capacitor C36 capacitance be respectively 10pf, 10pf, the model PC817 of the optocoupler Q1.

The utility model have the advantages that compared with prior art distribution network terminal remote signalling investment terminate into be DC simulation voltage, the utility model filters high-frequency interferencing signal by the magnetic bead of prime, using the low pass filtered of second level Wave circuit filters off the interference signal of low frequency, and analog signal is converted into digital signal finally by optocoupler and low and high level, thus Reach the isolation of digital-to-analogue, the effective solution signal interference of input state amount.The utility model structure is simple, applicability is good Good, quantity of state high resolution is very suitable to the remote signaling function of distribution network terminal.

Detailed description of the invention

Fig. 1 be the utility model proposes it is a kind of with it is anti-tampering investment design distribution network terminal in remote signal module structure Block diagram；

Fig. 2 be the utility model proposes it is a kind of with it is anti-tampering investment design distribution network terminal in remote signal module circuit Schematic diagram.

Specific embodiment

It is right below in conjunction with specific embodiments and the drawings to keep the technical solution of the utility model and advantage clearer The technical solution of the utility model is clearly and completely described, it is clear that described embodiment is one of the utility model Divide embodiment, instead of all the embodiments；Based on the embodiments of the present invention, those of ordinary skill in the art are not having Every other embodiment obtained under the premise of creative work is made, is fallen within the protection scope of the utility model.

As shown in Figure 1, the utility model embodiment proposes a kind of distribution network terminal with anti-tampering investment design, including CPU core core module, telemetry module, remote signal module and remote control module, wherein the remote signal module includes the anti-High-frequency Interference electricity of magnetic bead Road, two-stage low-pass wave circuit, the partial pressure reversal of diode protect circuit, light-coupled isolation conversion circuit, and external analog quantity of state is logical It crosses after magnetic bead anti-clutter circuit filters out high-frequency interferencing signal, is input to two-stage low-pass wave circuit and carries out low-pass filtering, then pass through Partial pressure reversal of diode protection circuit carries out partial pressure protection, is input to light-coupled isolation conversion circuit and carries out analog-to-digital conversion, last defeated Enter the port I/O of CPU core core module.

Further, as shown in Fig. 2, the anti-high-frequency interferencing circuit of the magnetic bead includes magnetic bead CZ and switch K1, the second level Low-pass filter circuit includes resistance R1, capacitor C1, resistance R2 and capacitor C2, and the partial pressure reversal of diode protection circuit includes electricity Hindering R3 and diode D17, the light-coupled isolation conversion circuit includes optocoupler Q1, resistance R4 and resistance R5, and the one of the switch K1 It holds and is connect with the anode of 12V DC voltage, the other end is connect with the input terminal of magnetic bead CZ1, and external analog quantity of state passes through described The division of switch K1 inputs, and the output end of magnetic bead CZ1 is connect with one end of resistance R1, and the other end of resistance R1 connects after capacitor C1 The cathode of 12V DC voltage is connect, resistance R2 and capacitor C36 are connected in parallel on the both ends of capacitor C1 after being connected in series, resistance R3 is connected in parallel on The both ends of capacitor C36, diode D17 are reversely connected the both ends for being connected in parallel on resistance R3, and optocoupler Q1 inputs the negative of cathode connecting diode D17 Pole, the anode of input cathode connection diode D17, output cathode connect 3.3V DC voltage electrode, and output negative pole is through resistance R4 After be grounded, output negative pole connects the port I/O of CPU core core module also after resistance R5.

Specifically, the model BLM31PG500SN1L, the resistance R1, resistance R2, resistance R3, resistance of the magnetic bead R4, resistance R5 resistance value be respectively as follows: 1K Ω, 1K Ω, 1K Ω, 4.71K Ω, 4.7K Ω, the capacitor of the capacitor C1, capacitor C36 Value is respectively 10pf, 10pf, the model PC817 of the optocoupler Q1.

The working principle of the utility model is as follows :+12V is the input signal of remote signalling quantity of state, passes through the switch K1 of outer end Division input；Distribution network terminal remote signalling investment terminate into be DC simulation voltage, high frequency is filtered by the magnetic bead of prime Interference signal, the interference signal of low frequency is filtered off using the low-pass filter circuit of second level, and the partial pressure reversal of diode is protected in circuit Resistance R3 and resistance R2 and resistance R1 play the role of partial pressure, protection optocoupler is played by the diode D17 for dividing and being reversely connected Analog signal is converted into digital signal finally by optocoupler Q1 by the effect of Q1, then when being not turned on, input cpu chip is low Level 0；When optocoupler is connected, input is high level 1.Then the anti-interference function of remote signals may be implemented in the utility model.

Distribution network terminal remote signalling investment terminate into be DC simulation voltage, by the magnetic bead of prime filter high frequency do Signal is disturbed, the interference signal of low frequency is filtered off using the low-pass filter circuit of second level, analog signal is converted finally by optocoupler For digital signal, to reach the isolation of digital-to-analogue, the effective solution signal interference of remote signalling input state amount.Simple applicability Well, quantity of state high resolution is very suitable to the remote signaling function of distribution network terminal.

The embodiments of the utility model have been described in detail above with reference to the accompanying drawings, but the utility model is not limited to Embodiment is stated, within the knowledge of a person skilled in the art, the utility model aims can also not departed from Under the premise of make a variety of changes.

Claims (3)

1. a kind of distribution network terminal with anti-tampering investment design, including CPU core core module, telemetry module, remote signal module and distant Control module, which is characterized in that the remote signal module includes the anti-high-frequency interferencing circuit of magnetic bead, two-stage low-pass wave circuit, partial pressure two Pole pipe reverse-connection protection circuit, light-coupled isolation conversion circuit, external analog quantity of state filter out high frequency by magnetic bead anti-clutter circuit and do It after disturbing signal, is input to two-stage low-pass wave circuit and carries out low-pass filtering, then carried out through partial pressure reversal of diode protection circuit After partial pressure protection, then through light-coupled isolation conversion circuit progress analog-to-digital conversion, it is input to the port I/O of CPU core core module.

2. a kind of distribution network terminal with anti-tampering investment design according to claim 1, which is characterized in that the magnetic bead Anti- high-frequency interferencing circuit includes magnetic bead CZ and switch K1, and the two-stage low-pass wave circuit includes resistance R1, capacitor C1, resistance R2 With capacitor C2, the partial pressure reversal of diode protection circuit includes resistance R3 and diode D17, the light-coupled isolation conversion circuit The anode connection of one end and DC voltage including optocoupler Q1, resistance R4 and resistance R5, the switch K1, the other end and magnetic bead The input terminal of CZ1 connects, and external analog quantity of state is inputted by the division of the switch K1, the output end and resistance of magnetic bead CZ1 One end of R1 connects, and the other end of resistance R1 connects the cathode of DC voltage after capacitor C1, and resistance R2 connects company with capacitor C36 The both ends of capacitor C1 are connected in parallel on after connecing, resistance R3 is connected in parallel on the both ends of capacitor C36, and diode D17 reversal connection is connected in parallel on resistance R3's Both ends, optocoupler Q1 input the cathode of cathode connecting diode D17, the anode of input cathode connection diode D17, and output cathode connects DC voltage electrode is connect, output negative pole is grounded after resistance R4, and output negative pole connects the I/ of CPU core core module also after resistance R5 O port.

3. a kind of distribution network terminal with anti-tampering investment design according to claim 2, which is characterized in that the magnetic bead Model BLM31PG500SN1L, the resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 resistance value be respectively as follows: 1K Ω, 1K Ω, 1K Ω, 4.71K Ω, 4.7K Ω, the capacitor C1, capacitor C36 capacitance be respectively 10pf, 10pf, the light The model PC817 of coupling Q1.