Power station network security terminal protection device

Abstract

The utility model relates to the technical field of network terminals, in particular to a power station network safety terminal protection device, which comprises a power supply protection circuit, and the power supply protection circuit comprises an input end, an output end, a surge suppressor and a field effect transistor. The input end is connected with power supply equipment and the output end is connected with the network security terminal; the VCC end of the surge suppressor is connected with the input end through a first resistor, the OV end of the surge suppressor is connected with the input end through a second resistor, the OV end is grounded through a third resistor, the AGATE end of the surge suppressor is connected with the grid electrode of the field-effect tube through a fourth resistor, the source electrode of the field-effect tube is connected with the input end, and the drain electrode of the field-effect tube is connected with the output end. The SOURCE end and the DGATE end of the surge suppressor are both connected with the drain electrode of the field effect transistor, and the OUT end of the surge suppressor is connected with the output end. A power supply protection circuit capable of effectively filtering surges is constructed, and stable power supply output is provided for a network safety protection terminal.

Description

TECHNICAL FIELD

[0001] The utility model relates to network terminal technical field, specifically, relate to a power station network security terminal protection device. BACKGROUND

[0002] The stable operation of modern power station depends on complex automation control system and network communication system, and the network security of power station is related to power station safety production and power transmission safety etc. And power station has a large number of sensitive information, such as power grid topology structure, equipment configuration parameter, user power consumption data etc., and these information involves the safety and stability of energy supply, and once the leakage can cause serious influence to national security and social stability. In order to guarantee the network security of power station and power grid node, the use of network security terminal has been valued. Network security terminal can prevent virus, malicious software etc. Intrusion, avoid the damage to the network-related equipment of power station, thereby ensuring the normal operation of various equipment of power station, reduces the system failure and downtime caused by network attack.

[0003] As the important equipment of guaranteeing the safety of power station network system, the stable and reliable operation of network security terminal is very important, and speaking of the actual use, one of the factors that greatly influence the stable operation of network security terminal is the stability of power supply. Based on this, the utility model expects to provide a kind of power station network security terminal protection device to realize stable power supply. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of power station network security terminal protection device, it is used to solve the power supply guarantee problem of network security terminal.

[0005] The utility model realizes by the following technical scheme:

[0006] Provide a kind of power station network security terminal protection device, including power supply protection circuit, the power supply protection circuit includes input, output, surge suppressor U1 and field effect tube Q1;

[0007] The input is connected to power supply equipment, and the output is connected to network security terminal;

[0008] The VCC end of the surge suppressor U1 is connected with the input end through a first resistor, the OV end of the surge suppressor U1 is connected with the input end through a second resistor, the OV end is also connected with the ground through a third resistor, the AGATE end of the surge suppressor U1 is connected with the gate of the field effect tube Q1 through a fourth resistor, the source of the field effect tube Q1 is connected with the input end, the drain of the field effect tube is connected with the output end, the SOURCE end and the DGATE end of the surge suppressor U1 are both connected with the drain of the field effect tube Q1, the OUT end of the surge suppressor U1 is connected with the output end, the FB end of the surge suppressor U1 is connected with the output end through a fifth resistor, and the FB end is also connected with the ground through a sixth resistor.

[0009] Further, the power supply protection circuit further comprises a voltage spike elimination circuit, the voltage spike elimination circuit comprises a transient voltage suppression diode, the negative electrode of the transient voltage suppression diode is connected with the input end, and the positive electrode is grounded.

[0010] Further, the power supply protection circuit further comprises a filter circuit, the filter circuit comprises a first capacitor and a first diode; one end of the first capacitor is connected to one end of the first resistor connected with the VCC end, and the negative electrode of the first diode is connected to one end of the first resistor connected with the VCC end; the other end of the first capacitor and the positive electrode of the first diode are both grounded.

[0011] Further, the power supply protection circuit further comprises a second diode, the positive electrode of the second diode is connected with the SOURCE end, and the negative electrode of the second diode is connected with the AGATE end.

[0012] Further, the power supply protection circuit further comprises a field effect tube protection circuit, the field effect tube protection circuit comprises a third diode, a second capacitor and a seventh resistor; one end of the seventh resistor and the positive electrode of the third diode are connected with the gate of the field effect tube Q1 through the fourth resistor, and the other end of the seventh resistor and the negative electrode of the third diode are grounded through the second capacitor.

[0013] Further, the UV end of the surge suppressor U1 is short-circuited with the VCC end.

[0014] Further, an eighth resistor is arranged between the drain of the field effect tube and the output end, and the eighth resistor is used for overcurrent detection.

[0015] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0016] The utility model discloses a power supply protection circuit that can effectively filter out surges by using the surge suppressor U1 and the field effect tube Q1, thereby providing stable power output for a network security protection terminal. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A circuit schematic diagram of the power protection circuit is provided in the utility model;

[0018] Figure 2 Another circuit schematic diagram of the power protection circuit is provided in the utility model;

[0019] Icon: U1 - surge suppressor, Q1 - field effect tube, TVS - transient voltage suppression diode, C1 - first capacitor, C2 - second capacitor, D1 - first diode, D2 - second diode, D3 - third diode, R1 - first resistor, R2 - second resistor, R3 - third resistor, R4 - fourth resistor, R5 - fifth resistor, R6 - sixth resistor, R7 - seventh resistor, R8 - eighth resistor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] In order to provide stable power supply for the network security terminal of the power station, the utility model provides a kind of power station network security terminal protection device, as shown in figure Figure 1 The power protection circuit includes input terminal, output terminal, surge suppressor U1 and field effect tube Q1;Input terminal is connected to power supply equipment, and output terminal is connected to network security terminal;The VCC end of surge suppressor U1 is connected to input terminal by first resistance, and the OV end of surge suppressor U1 is connected to input terminal by second resistance, and OV end is also connected to ground by third resistance, the AGATE end of surge suppressor U1 is connected to the gate of field effect tube Q1 by fourth resistance, the source of field effect tube Q1 is connected to input terminal, and the drain of field effect tube is connected to output terminal, the SOURCE end and the DGATE end of surge suppressor U1 are all connected to the drain of field effect tube Q1, the OUT end of surge suppressor U1 is connected to output terminal, the FB end of surge suppressor U1 is connected to output terminal by fifth resistance, and FB end is also connected to ground by sixth resistance.

[0022] The above scheme realizes the processing of power end surge voltage by the joint application of surge suppressor U1 and field effect tube Q1, so that the voltage output to network security terminal is more stable.

[0023] In order to further make the output voltage smooth, without affecting the safety of network security terminal equipment, the utility model further provides an improved idea, specifically asFigure 2 As shown in the figure; in Figure 1 The voltage peak elimination circuit further comprises a transient voltage suppression diode, the negative electrode of the transient voltage suppression diode is connected to the input end, and the positive electrode is grounded.

[0024] In order to stabilize the supply voltage of the surge suppressor U1, the filter circuit further comprises a first capacitor and a first diode; one end of the first capacitor is connected to one end of the first resistor connected to the VCC end, and the negative electrode of the first diode is connected to one end of the first resistor connected to the VCC end; the other end of the first capacitor and the positive electrode of the first diode are both grounded.

[0025] The power supply protection circuit further comprises a second diode, the positive electrode of the second diode is connected to the SOURCE end, and the negative electrode of the second diode is connected to the AGATE end.

[0026] In order to prevent the field effect tube Q1 from self-conduction, the power supply protection circuit further comprises a field effect tube protection circuit, the field effect tube protection circuit comprises a third diode, a second capacitor and a seventh resistor; one end of the seventh resistor and the positive electrode of the third diode are connected to the gate of the field effect tube Q1 through a fourth resistor, and the other end of the seventh resistor and the negative electrode of the third diode are grounded through the second capacitor.

[0027] When the protected network security terminal has a backup power supply, the undervoltage monitoring can be turned off, at this time, the UV end of the surge suppressor U1 is short-circuited with the VCC end.

[0028] In addition, the eighth resistor is arranged between the drain of the field effect tube and the output end, and the eighth resistor is used for overcurrent detection.

[0029] The above scheme utilizes the surge suppressor U1 and the field effect tube Q1 to construct the power supply protection circuit capable of effectively filtering out surges, and further provides a stable power output for the network security protection terminal.

[0030] The above is only a preferred embodiment of the present application and is not used to limit the present application, and for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power station network security terminal protection device, characterized in that: The power protection circuit comprises an input end, an output end, a surge suppressor U1 and a field effect tube Q1; The input end is connected with a power supply device, and the output end is connected with a network security terminal. The VCC end of the surge suppressor U1 is connected with the input end through a first resistor, the OV end of the surge suppressor U1 is connected with the input end through a second resistor, the OV end is further connected with the ground through a third resistor, the AGATE end of the surge suppressor U1 is connected with the gate of the field effect tube Q1 through a fourth resistor, the source of the field effect tube Q1 is connected with the input end, the drain of the field effect tube is connected with the output end, the SOURCE end and the DGATE end of the surge suppressor U1 are both connected with the drain of the field effect tube Q1, the OUT end of the surge suppressor U1 is connected with the output end, the FB end of the surge suppressor U1 is connected with the output end through a fifth resistor, and the FB end is further connected with the ground through a sixth resistor.

2. The power station network security terminal protection apparatus according to claim 1, wherein The power protection circuit further comprises a voltage spike elimination circuit, and the voltage spike elimination circuit comprises a transient voltage suppression diode.

3. The power station network security terminal protection apparatus according to claim 1, wherein The power protection circuit further comprises a filter circuit, and the filter circuit comprises a first capacitor and a first diode; one end of the first capacitor is connected to one end of the first resistor connected with the VCC end, and the negative electrode of the first diode is connected to one end of the first resistor connected with the VCC end; the other end of the first capacitor and the positive electrode of the first diode are both grounded.

4. The power station network security terminal protection apparatus according to claim 1, wherein The power protection circuit further comprises a second diode, the positive electrode of the second diode is connected with the SOURCE end, and the negative electrode of the second diode is connected with the AGATE end.

5. The power station network security terminal protection apparatus according to claim 1, wherein The power protection circuit further comprises a field effect tube protection circuit, and the field effect tube protection circuit comprises a third diode, a second capacitor and a seventh resistor; one end of the seventh resistor and the positive electrode of the third diode are connected with the gate of the field effect tube Q1 through the fourth resistor, and the other end of the seventh resistor and the negative electrode of the third diode are grounded through the second capacitor.

6. The power plant network security terminal protection apparatus according to claim 1, wherein The UV end of the surge suppressor U1 is short-circuited with the VCC end.

7. The power station network security terminal protection apparatus according to claim 1, wherein An eighth resistor is further arranged between the drain of the field effect tube and the output end, and the eighth resistor is used for overcurrent detection.

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