Long-distance voltage-stabilizing power supply system for expressway camera

Abstract

The long-distance voltage-stabilizing power supply system comprises a power distribution room, a 2000VA alternating-current voltage stabilizer, a power distribution box, a main cable, an auxiliary cable and a camera, the distribution box is connected with the camera by connecting the main cable with the auxiliary cable; the voltage at the camera is 220 + / -10V; the distribution room is connected with the distribution box; an alternating-current voltage stabilizer is arranged at the power distribution room, so that the output voltage is increased to 235V; the distance between the distribution box and the farthest camera is 13km. According to the scheme, the remote power supply problem of the intelligent terminal equipment on the expressway is solved. The method for realizing low-voltage remote power supply by adopting the voltage stabilizing circuit has the advantages of safety, economy, stable voltage, reliability in operation, low failure rate, convenience in maintenance and the like, and the problem of remote power supply of the expressway monitoring camera is effectively solved.

Description

Technical Field

[0001] The present application relates to the field of power management, and in particular to a long-distance voltage-stabilized power supply system for highway cameras. Background Art

[0002] Compared with general roads, expressways have the characteristics of good linearity, large traffic flow and high driving speed. If advanced monitoring and management measures are not adopted, traffic accidents and traffic jams are very likely to occur under conditions of heavy traffic volume and bad weather.

[0003] At present, the monitoring scheme of expressways mainly consists of subsystems such as real-time image status, vehicle flow and velocity detection, emergency telephone and environmental monitoring, and variable information boards. The characteristics of full-road monitoring of high-grade highways are that there are many monitoring points, long transmission distances, and difficulty in obtaining power locally.

[0004] In the whole process monitoring, due to the long transmission line, the power supply of instruments such as video monitoring, weather environment detectors and vehicle flow detectors has become a major problem. At present, the commonly used method is to use the AC power supply from the substation set up on the highway to power the remote equipment through the laid power cable. The equipment power supply adopts the AC remote power supply form. The AC power energy located in the communication power room or substation is transmitted to the full-process monitoring equipment through the power cable. Due to the long distance and the large line voltage drop, it is necessary to add the necessary voltage-stabilized power supply on the line. Moreover, since the AC power supply is used to remotely power the equipment through the cable, if the original pipeline parallel to the communication cable is used, it is bound to cause interference to the communication due to the long transmission distance. Therefore, the laying of the power cable is changed to digging trenches on both sides of the highway, resulting in an increase in construction costs. In addition, there is also a form of solar cell power supply, but it is greatly affected by the weather and cannot ensure normal power supply in long-term rainy weather. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a long-distance voltage-stabilized power supply system for highway cameras, including a distribution room, a 2000VA AC voltage stabilizer, a distribution box, a main cable, a sub-cable and a camera; the distribution box is connected to the sub-cable through the main cable and thus connected to the camera; the voltage at the camera is 220±10V; the distribution room is connected to the distribution box; a 2000VA AC voltage stabilizer is installed in the distribution room to increase the output voltage to 235V; the distribution box is 13km away from the farthest camera.

[0006] Specifically, it also includes: a 500VA AC voltage stabilizer, the 500VA AC voltage stabilizer includes: a first 500VA AC voltage stabilizer, a second 500VA AC voltage stabilizer, a third 500VA AC voltage stabilizer, a fourth 500VA AC voltage stabilizer, a fifth 500VA AC voltage stabilizer, a sixth 500VA AC voltage stabilizer, a seventh 500VA AC voltage stabilizer and an eighth 500VA AC voltage stabilizer; cameras include: a first camera, a second camera, a third camera, a fourth camera, a fifth camera, a sixth camera, a seventh camera and an eighth camera; 8 groups of 500VA AC voltage stabilizers are connected to the 8 groups of cameras one by one.

[0007] Specifically, the auxiliary cables include: a first auxiliary cable, a second auxiliary cable, a third auxiliary cable, a fourth auxiliary cable, a fifth auxiliary cable, a sixth auxiliary cable, a seventh auxiliary cable and an eighth auxiliary cable; the cross-sectional area of ​​the auxiliary cable is 16mm 2 Aluminum core cable with a resistivity of 0.0283Ω·mm 2 / M; one end of the first sub-cable is connected to the distribution box, and the other end is connected to the first 500VA AC voltage stabilizer; one end of the second sub-cable is connected to the first 500VA AC voltage stabilizer, and the other end is connected to the second 500VA AC voltage stabilizer; one end of the third sub-cable is connected to the second 500VA AC voltage stabilizer, and the other end is connected to the third 500VA AC voltage stabilizer; one end of the fourth sub-cable is connected to the third 500VA AC voltage stabilizer, and the other end is connected to the fourth 500VA AC voltage stabilizer; one end of the fifth sub-cable is connected to the fourth 500VA AC voltage stabilizer, and the other end is connected to the fifth 500VA AC voltage stabilizer; one end of the sixth sub-cable is connected to the fifth 500VA AC voltage stabilizer, and the other end is connected to the sixth 500VA AC voltage stabilizer; one end of the seventh sub-cable is connected to the sixth 500VA AC voltage stabilizer, and the other end is connected to the seventh 500VA AC voltage stabilizer; one end of the eighth sub-cable is connected to the seventh 500VA AC voltage stabilizer, and the other end is connected to the eighth 500VA AC voltage stabilizer.

[0008] Specifically, the length of the first cable is 1500m.

[0009] Specifically, the lengths of the second sub-cable, the third sub-cable, the fourth sub-cable, the fifth sub-cable, the sixth sub-cable and the seventh sub-cable are 1000 m.

[0010] Specifically, the length of the eighth cable is 1800m.

[0011] Specifically, one end of the main cable is connected to the AC voltage stabilizer, and the other end of the main cable is connected to the distribution box. The length of the main cable is 3000m.

[0012] Specifically, the cross-sectional area of ​​the main cable is 11.6mm 2 Aluminum core cable with a resistivity of 0.0283Ω·mm 2 / M.

[0013] This solution uses a voltage-stabilizing circuit to achieve low-voltage long-distance power supply. It has the advantages of safety, economy, stable voltage, reliable operation, low failure rate, and convenient maintenance. It effectively solves the problem of long-distance power supply for highway surveillance cameras. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and are used together with the description to explain the principles of the present application. It will be easy to recognize other embodiments and many expected advantages of the embodiments because they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with each other. The same reference numerals refer to corresponding similar parts.

[0015] Figure 1 It is a connection diagram of a long-distance voltage-stabilized power supply system for a highway camera according to an embodiment of the present application.

[0016] The meaning of the numbers in the figure: 1, distribution room; 2, distribution box; 3, 2000VA AC voltage stabilizer; 4a, first 500VA AC voltage stabilizer; 5a, second 500VA AC voltage stabilizer; 6a, third 500VA AC voltage stabilizer; 7a, fourth 500VA AC voltage stabilizer; 8a, fifth 500VA AC voltage stabilizer; 9a, sixth 500VA AC voltage stabilizer; 10a, seventh 500VA AC voltage stabilizer; 11a, eighth 500VA AC Flow stabilizer; 4b, first camera; 5b, second camera; 6b, third camera; 7b, fourth camera; 8b, fifth camera; 9b, sixth camera; 10b, seventh camera; 11b, eighth camera; 4c, first sub-cable; 5c, second sub-cable; 6c, third sub-cable; 7c, fourth sub-cable; 8c, fifth sub-cable; 9c, sixth sub-cable; 10c, seventh sub-cable; 11c, eighth sub-cable; 12, main cable. DETAILED DESCRIPTION

[0017] In the following detailed description, reference is made to the accompanying drawings, which form a part of the detailed description and are shown by illustrative specific embodiments in which the present application can be practiced. To this end, directional terms, such as "top", "bottom", "left", "right", "up", "down", etc., are used with reference to the orientation of the figures described. Because the components of the embodiments can be positioned in several different orientations, directional terms are used for the purpose of illustration and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present application. Therefore, the following detailed description should not be adopted in a limiting sense, and the scope of the present application is defined by the appended claims.

[0018] Figure 1 is a connection diagram of a long-distance voltage-stabilized power supply system for a highway camera according to an embodiment of the present application, such as Figure 1 As shown, a long-distance voltage-stabilized power supply system for highway cameras includes a distribution room 1, a 2000VA AC voltage stabilizer 3, a distribution box 2, a main cable 12, a sub-cable and a camera; the distribution box 2 is connected to the sub-cable through the main cable 12 and thus connected to the camera; the voltage at the camera is 220±10V; the distribution room 1 is connected to the distribution box 2; a 2000VA AC voltage stabilizer 3 is set at the distribution room 1 to increase the output voltage to 235V; the distribution box 2 is 13km away from the farthest camera.

[0019] Specifically, it also includes: a 500VA AC voltage stabilizer, the 500VA AC voltage stabilizer includes: a first 500VA AC voltage stabilizer 4a, a second 500VA AC voltage stabilizer 5a, a third 500VA AC voltage stabilizer 6a, a fourth 500VA AC voltage stabilizer 7a, a fifth 500VA AC voltage stabilizer 8a, a sixth 500VA AC voltage stabilizer 9a, a seventh 500VA AC voltage stabilizer 10a and an eighth 500VA AC voltage stabilizer 11a; the cameras include: a first camera 4b, a second camera 5b, a third camera 6b, a fourth camera 7b, a fifth camera 8b, a sixth camera 9b, a seventh camera 10b and an eighth camera 11b; 8 groups of 500VA AC voltage stabilizers are connected to the 8 groups of cameras one by one.

[0020] Specifically, the auxiliary cables include: a first auxiliary cable 4c, a second auxiliary cable 5c, a third auxiliary cable 6c, a fourth auxiliary cable 7c, a fifth auxiliary cable 8c, a sixth auxiliary cable 9c, a seventh auxiliary cable 10c and an eighth auxiliary cable 11c; the cross-sectional area of ​​the auxiliary cable is 16mm 2 Aluminum core cable with a resistivity of 0.0283Ω·mm 2 / M; one end of the first sub-cable 4c is connected to the distribution box 2, and the other end is connected to the first 500VA AC voltage stabilizer 4a; one end of the second sub-cable 5c is connected to the first 500VA AC voltage stabilizer 4a, and the other end is connected to the second 500VA AC voltage stabilizer 5a; one end of the third sub-cable 6c is connected to the second 500VA AC voltage stabilizer 5a, and the other end is connected to the third 500VA AC voltage stabilizer 6a; one end of the fourth sub-cable 7c is connected to the third 500VA AC voltage stabilizer 6a, and the other end is connected to the fourth 500VA AC voltage stabilizer 7a; the fifth sub-cable One end of 8c is connected to the fourth 500VA AC voltage stabilizer 7a, and the other end is connected to the fifth 500VA AC voltage stabilizer 8a; one end of the sixth sub-cable 9c is connected to the fifth 500VA AC voltage stabilizer 8a, and the other end is connected to the sixth 500VA AC voltage stabilizer 9a; one end of the seventh sub-cable 10c is connected to the sixth 500VA AC voltage stabilizer 9a, and the other end is connected to the seventh 500VA AC voltage stabilizer 10a; one end of the eighth sub-cable 11c is connected to the seventh 500VA AC voltage stabilizer 10a, and the other end is connected to the eighth 500VA AC voltage stabilizer 11a.

[0021] Specifically, the length of the first sub-cable 4c is 1500m.

[0022] Specifically, the lengths of the second sub-cable 5c, the third sub-cable 6c, the fourth sub-cable 7c, the fifth sub-cable 8c, the sixth sub-cable 9c, and the seventh sub-cable 10c are 1000 m.

[0023] Specifically, the length of the eighth sub-cable 11c is 1800 m.

[0024] Specifically, one end of the main cable 12 is connected to the AC voltage stabilizer, and the other end of the main cable 12 is connected to the distribution box 2. The length of the main cable 12 is 3000m.

[0025] Specifically, the cross-sectional area of ​​the main cable 12 is 11.6 mm 2 Aluminum core cable with a resistivity of 0.0283Ω·mm 2 / M.

[0026] Example:

[0027] Taking a certain expressway as an example, after surveying and measuring along the expressway, it was found that the 45# camera in section B was the farthest from the power source. A certain tax collection office was about 13 km away from the 45# camera, so a total of 11 sets of surveillance cameras from 45# to 55# were required, and the actual measured capacity of each camera was about 35W.

[0028] First, a 2000VA AC voltage stabilizer was installed in the power distribution room of a tax collection office and the output voltage was increased to 235V. The cable calculation was performed with the distribution box as the reference point, and YJLV0.6 / 1kv aluminum core cable was selected to prevent theft.

[0029] The measured capacity of each camera is 35W. The working current of 11 cameras is calculated as follows:

[0030] I=W / U·cosφ=11×35 / 235×0.8=2.05A.

[0031] Assuming the voltage drop of the distribution box at 3km is 15V, calculate the resistance of the cable:

[0032] R=V / I=15 / 2.05=7.317Ω.

[0033] Calculate the cable cross-sectional area:

[0034] S=P·L / R=0.0283×3000 / 7.317=11.6mm 2 , where S is cross-sectional area, P is resistivity, L is length, and R is resistance.

[0035] According to the calculation, choose a wire diameter greater than 11.6mm 2 Aluminum core cable model: YJLV 0.6 / 1kv-2×16mm 2 Aluminum core cable.

[0036] Calculate the voltage drop and voltage at the distribution box:

[0037] Cable resistance: R = P × L / S = 0.0283 × 3000 / 16 = 5.306Ω;

[0038] Voltage drop: V = IR = 2.05 × 5.306 = 10.877 V;

[0039] Voltage at the distribution box: Ubox = 235.566-10.877 = 224.689V.

[0040] The power supply is divided into two circuits at the distribution box. Circuit A is used to power cameras 55#, 54#, and 53#. The cable length is 3.2km, and no voltage drop and voltage calculation is required. Circuit B is used to power cameras 52#, 51#, 50#, 49#, 48#, 47#, 46#, and 45# (8 sets). The total cable length is 13.1km. Calculate the voltage drop and voltage at each surveillance camera location:

[0041] There are 8 cameras at the 52# camera, which is 1.5 km away from the distribution box of the previous test point. Calculate the voltage drop V and the voltage U at the 52# camera. 52 :

[0042] Working current: I = W / U box·cosφ = 8×35 / 224.689×0.8 = 1.558A;

[0043] Cable resistance: R = P × L / S = 0.0283 × 1500 / 16 = 2.653Ω;

[0044] Voltage drop: V = IR = 1.558 × 2.653 = 4.133 V;

[0045] Voltage at camera #52: U 52 =224.689-4.113=220.576V.

[0046] There are 7 cameras at the 51# camera, which is 1km away from the previous 52# camera. Calculate the voltage drop V and the voltage U at the 51# camera. 51 :

[0047] Working current: I = W / U 52 ·cosφ=7×35 / 220.576×0.8=1.388A;

[0048] Cable resistance: R = P × L / S = 0.0283 × 1000 / 16 = 1.769Ω;

[0049] Voltage drop: V = IR = 1.388 × 1.769 = 2.455 V;

[0050] Voltage at camera #51: U 51 =220.576-2.455=218.121V.

[0051] The distance between the 50# camera and the previous 51# camera is 1km. There are 6 cameras. Calculate the voltage drop V and the voltage U at the 50# camera. 50 :

[0052] Working current: I = W / U 51 ·cosφ=6×35 / 218.121×0.8=1.203A;

[0053] Cable resistance: R = P × L / S = 0.0283 × 1000 / 16 = 1.769Ω;

[0054] Voltage drop: V = IR = 1.203 × 1.769 = 2.129 V;

[0055] Voltage at camera No. 50: U 50 =218.121-2.129=216.0V.

[0056] There are 5 cameras at the 49# camera, which is 1km away from the previous 50# camera. Calculate the voltage drop V and the voltage U at the 49# camera. 49 :

[0057] Working current: I = W / U 50·cosφ=5×35 / 216.0×0.8=1.013A;

[0058] Cable resistance: R = P × L / S = 0.0283 × 1000 / 16 = 1.769Ω;

[0059] Voltage drop: V = IR = 1.013 × 1.769 = 1.79 V;

[0060] Voltage at camera No. 49: U 49 =216.0-1.79=214.21V.

[0061] There are 4 cameras at the 48# camera, which is 1km away from the previous 49# camera. Calculate the voltage drop V and the voltage U at the 48# camera. 48 :

[0062] Working current: I = W / U 49 ·cosφ=4×35 / 214.21×0.8=0.817A;

[0063] Cable resistance: R = P × L / S = 0.0283 × 1000 / 16 = 1.769Ω;

[0064] Voltage drop: V = IR = 0.817 × 1.769 = 1.445 V;

[0065] Voltage at camera No. 48: U 48 =214.21-1.445=212.76V.

[0066] There are 3 cameras at the 47# camera, which is 1km away from the previous 48# camera. Calculate the voltage drop V and the voltage U at the 47# camera. 47 :

[0067] Working current: I = W / U 48 ·cosφ=3×35 / 212.76×0.8=0.62A;

[0068] Cable resistance: R = P × L / S = 0.0283 × 1000 / 16 = 1.769Ω;

[0069] Voltage drop: V = IR = 0.62 × 1.769 = 1.09 V;

[0070] Voltage at camera #47: U 47 =212.76-1.09=211.669V.

[0071] There are two cameras, 1km away from the 47# camera at the 46# camera. Calculate the voltage drop V and the voltage U at the 46# camera.46 :

[0072] Working current: I = W / U 47 ·cosφ=2×35 / 211.669×0.8=0.413A;

[0073] Cable resistance: R = P × L / S = 0.0283 × 1000 / 16 = 1.769Ω;

[0074] Voltage drop: V = IR = 0.413 × 1.769 = 0.731 V;

[0075] Voltage at camera No. 46: U 46 =211.669-0.731=210.968V.

[0076] The 45th camera is located on the A road of the section. The distance to the 46th camera on the B road of the section is 1.8 km. Calculate the voltage drop V and the voltage U at the 45th camera. 45 :

[0077] Working current: I = W / U 46 ·cosφ=1×35 / 210.968×0.8=0.207A;

[0078] Cable resistance: R = P × L / S = 0.0283 × 1800 / 16 = 3.184Ω;

[0079] Voltage drop: V = IR = 0.207 × 3.184 = 0.659 V;

[0080] Voltage at camera No. 45: U 45 =210.968-0.659=210.309V.

[0081] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present application without departing from the spirit and scope of the present application. In this way, if these modifications and changes are within the scope of the claims of the present application and their equivalents, the present application is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recorded in mutually different dependent claims does not indicate that the combination of these measures cannot be used to profit. Any figure mark in the claims should not be considered to limit the scope.

Claims

1. A long-distance voltage-stabilized power supply system for highway cameras, characterized in that: It includes a power distribution room, a 2000VA AC voltage stabilizer, a distribution box, a main cable, a secondary cable and a camera; the distribution box is connected to the secondary cable through the main cable and thus connected to the camera; the voltage at the camera is 220±10V; The distribution room is connected to the distribution box; the 2000VA AC voltage stabilizer is arranged in the distribution room to increase the output voltage to 235V; the distribution box is 13km away from the farthest camera.

2. According to claim 1, a long-distance voltage-stabilized power supply system for highway cameras is characterized in that: Also includes: 500VA AC voltage stabilizer, the 500VA AC voltage stabilizer includes: a first 500VA AC voltage stabilizer, a second 500VA AC voltage stabilizer, a third 500VA AC voltage stabilizer, a fourth 500VA AC voltage stabilizer, a fifth 500VA AC voltage stabilizer, a sixth 500VA AC voltage stabilizer, a seventh 500VA AC voltage stabilizer and an eighth 500VA AC voltage stabilizer; the cameras include: a first camera, a second camera, a third camera, a fourth camera, a fifth camera, a sixth camera, a seventh camera and an eighth camera; the 8 groups of 500VA AC voltage stabilizers are connected one by one to the 8 groups of cameras.

3. According to claim 2, a long-distance voltage-stabilized power supply system for highway cameras is characterized in that: The auxiliary cables include: a first auxiliary cable, a second auxiliary cable, a third auxiliary cable, a fourth auxiliary cable, a fifth auxiliary cable, a sixth auxiliary cable, a seventh auxiliary cable and an eighth auxiliary cable; the cross-sectional area of ​​the auxiliary cables is 16mm 2 Aluminum core cable, resistivity ≤ 0.0283Ω·mm 2 / M; one end of the first pair of cables is connected to the distribution box, and the other end is connected to the first 500VA AC voltage stabilizer; one end of the second pair of cables is connected to the first 500VA AC voltage stabilizer, and the other end is connected to the second 500VA AC voltage stabilizer; one end of the third pair of cables is connected to the second 500VA AC voltage stabilizer, and the other end is connected to the third 500VA AC voltage stabilizer; one end of the fourth pair of cables is connected to the third 500VA AC voltage stabilizer, and the other end is connected to the fourth 500VA AC voltage stabilizer; One end of the fifth sub-cable is connected to the fourth 500VA AC voltage stabilizer, and the other end is connected to the fifth 500VA AC voltage stabilizer; one end of the sixth sub-cable is connected to the fifth 500VA AC voltage stabilizer, and the other end is connected to the sixth 500VA AC voltage stabilizer; one end of the seventh sub-cable is connected to the sixth 500VA AC voltage stabilizer, and the other end is connected to the seventh 500VA AC voltage stabilizer; one end of the eighth sub-cable is connected to the seventh 500VA AC voltage stabilizer, and the other end is connected to the eighth 500VA AC voltage stabilizer.

4. A highway camera long-distance voltage-stabilized power supply system according to claim 3, characterized in that: The length of the first sub-cable is 1500m.

5. The long-distance voltage-stabilized power supply system for highway cameras according to claim 3 is characterized in that: The length of the second sub-cable, the third sub-cable, the fourth sub-cable, the fifth sub-cable, the sixth sub-cable and the seventh sub-cable is 1000m.

6. The long-distance voltage-stabilized power supply system for highway cameras according to claim 3 is characterized in that: The length of the eighth sub-cable is 1800m.

7. The long-distance voltage-stabilized power supply system for highway cameras according to claim 1 is characterized in that: One end of the main cable is connected to the AC voltage stabilizer, and the other end of the main cable is connected to the distribution box. The length of the main cable is 3000m.

8. The long-distance voltage-stabilized power supply system for highway cameras according to claim 1 is characterized in that: The cross-sectional area of ​​the main cable is 11.6mm 2 Aluminum core cable with a resistivity of 0.0283Ω·mm 2 / M.

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