Low-voltage comprehensive treatment compensation cabinet based on voltage type plug capacitor

Abstract

The utility model provides a low-voltage comprehensive treatment compensation cabinet based on a voltage type plug capacitor, which comprises a main box body (2) which is installed and fixed through a base (1), and the voltage type plug capacitor (3) which is used for carrying out low-voltage comprehensive treatment is installed in the main box body (2) in a pluggable mode. According to different on-site conditions, a plurality of low-voltage treatment modules (voltage type plug capacitors) are installed, low-voltage comprehensive treatment can be completed only by connecting three-phase power / single-phase power without other sampling signals, the economical efficiency is high, and the adaptability to factors such as the installation environment is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a low voltage comprehensive treatment compensation cabinet, especially a low voltage comprehensive treatment compensation cabinet based on voltage type plug -in capacitor. BACKGROUND

[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] With the increasing types of electrical equipment, the problem of low terminal voltage of various types of transformer area becomes more and more significant, and some areas do not have the condition of three-phase power at the end, so it is urgent to have an overall solution that is economical and efficient, meets the power supply environment with only single-phase power, is easy to install and debug, and is easy to maintain in the future in the field of low voltage treatment at the end. From the technical point of view, to raise the voltage, on the low voltage side of the end, either take the passive technology route and install capacitors to raise the voltage after parallel connection, or take the active technology route, that is, the power electronic technology route, to raise and stabilize the voltage by rectifier unit and inverter unit to achieve the purpose.

[0004] The problem of distribution network "low voltage" shows obvious seasonality and regional characteristics, and has the characteristics of dynamic and complexity. The main reasons are as follows:

[0005] a) The supply radius of transformer area is large, resulting in low terminal voltage:

[0006] According to the statistics of a province, the average low voltage supply radius is 1.56km, and the supply radius of more than 0.8km accounts for 85% of the total number of low voltage transformer areas.

[0007] b) The line diameter of transformer area power supply line is small, and the line is seriously aged:

[0008] At present, many low voltage lines still use small line diameter of 35, 16, which increases the line impedance.

[0009] c) Serious overload socket, and insufficient capacity of distribution transformer:

[0010] According to statistics, the load rate of transformer area reaches more than 90%, accounting for 43% of the total number of low voltage transformer areas; The average capacity of distribution transformer per household in low voltage transformer area is only 0.63kVA, which is lower than the average level of 0.83kVA per household capacity.

[0011] d) Single-phase overload and neutral point deviation caused by unbalanced three-phase load:

[0012] The load configuration of three-phase line in some transformer areas is unbalanced, especially in high temperature and high load area, and the unbalance leads to more sufficient exposure of voltage quality problem. In some rural areas of small hydropower developed areas, high voltage caused by power generation in wet season and low voltage after power generation in dry season exist in the same place.

[0013] In the prior art, the above problems are mainly solved by the following technical solutions, but there are corresponding technical problems:

[0014] a) Install distribution transformer at the end of the line:

[0015] Disadvantages: high cost, difficult to recover power supply cost under small load.

[0016] b) Transform the branch line:

[0017] Disadvantages: limited effect for larger length.

[0018] c) Increase the low-voltage side bus voltage of the distribution transformer:

[0019] Disadvantages: inconvenient for manual voltage regulation, high cost for thyristor automatic voltage regulation, and small adjustment for long line voltage drop.

[0020] d) Install voltage stabilizer:

[0021] Disadvantages: generally not more than 20%, small voltage stabilization range, cannot meet the low voltage regulation requirement.

[0022] e) Install distributed power generation device:

[0023] Disadvantages: can improve power supply reliability, high cost of new energy.

[0024] f) Increase line reactive power compensation device:

[0025] Disadvantages: low cost, high cost performance, convenient to install, can solve the low voltage caused by reactive power problem.

[0026] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those skilled in the art. Practical new type content

[0027] The technical problem to be solved by the present utility model is to provide a low voltage comprehensive treatment compensation cabinet based on voltage type plug-in capacitor in view of the deficiencies of the prior art.

[0028] In order to solve the above technical problems, the utility model discloses a low voltage comprehensive treatment compensation cabinet based on voltage type plug-in capacitor, which comprises:

[0029] The main box body is installed and fixed by the base, and the voltage type plug-in capacitor for low voltage comprehensive treatment is installed in the main box body in a plug-in manner.

[0030] Further, the base is installed on the ground or horizontal platform, comprising:

[0031] The base connecting column is fixedly arranged at the bottom of the main box body, and the bottom surface of the base connecting column is connected with the ground or horizontal platform to maintain the horizontal state of the main box body.

[0032] Further, the base is installed on the rod, comprising:

[0033] The base connecting column is fixedly arranged at the bottom of the main box body, and the bottom of the base connecting column is fixedly arranged with a horizontal support, the end of the horizontal support away from the base connecting column is fixedly arranged with a clamp, and the clamp is clamped on the rod to prevent the rod from sliding up and down.

[0034] Further, the end of the horizontal support away from the clamp is fixedly arranged with a support rod, the lower end of the support rod is fixedly arranged with a clamp, the clamp is clamped on the rod, the support rod is arranged obliquely downward, and a triangular support structure is formed by the horizontal support and the rod to stably support the main box body.

[0035] Further, the main box body is a hollow box body, comprising:

[0036] The main box body shell is open at the side and front surfaces and is provided with a door, the top of the main box body shell is detachably installed with a box cover, the inner side of the back surface of the main box body shell is provided with a fan, the back surface of the main box body shell is provided with an air outlet corresponding to the fan to realize air exchange inside and outside the fan, and the lower part of the inner side of the back surface of the main box body shell is fixedly arranged with a lightning arrester.

[0037] Further, the inner side of the main box body shell is fixedly arranged with an internal support frame corresponding to the opening, and the internal support frame is arranged vertically to install the equipment arranged in the main box body.

[0038] Further, the internal support frame is installed with a circuit breaker and a plug-in capacitor switch, the circuit breaker is used for controlling the on-off of the electricity in the low-voltage comprehensive treatment compensation cabinet and performing overload and short-circuit protection, and the plug-in capacitor switch is used for controlling the on-off of the voltage type plug-in capacitor and performing overload and short-circuit protection.

[0039] Further, the voltage type plug-in capacitor comprises:

[0040] The capacitor shell is a hollow cuboid sheet structure and is vertically inserted and installed in the main box body.

[0041] The handle is arranged on the front surface of the capacitor shell and is used for plugging and unplugging the voltage type plug-in capacitor; the communication interface is arranged on the front surface of the capacitor shell and is used for communicating with external equipment; the display screen and the control panel are arranged on the front surface of the capacitor shell and are used for setting the voltage type plug-in capacitor and displaying relevant information; and the front heat dissipation hole is arranged on the front surface of the capacitor shell and is used for heat dissipation of the voltage type plug-in capacitor.

[0042] Further, the capacitor main body is arranged in the capacitor shell, the circuit board is arranged on the top inner side of the capacitor shell, the circuit board is electrically connected with the communication interface, the display screen, the control panel and the capacitor main body, the rear heat dissipation hole is arranged on the back surface of the capacitor shell and is used for heat dissipation, the capacitor plug-in part is arranged on the lower part of the back surface of the capacitor shell and is used for plug-in installation of the voltage type plug-in capacitor, and the bottom slide rail is arranged on the bottom surface of the capacitor shell and is used for sliding in and out of the main box during plugging and unplugging installation.

[0043] Further, the number of the voltage type plug-in capacitors is more than one according to requirements.

[0044] Beneficial effects:

[0045] 1. The low-voltage comprehensive treatment compensation cabinet has the advantages that according to different site conditions, a plurality of low-voltage treatment modules (voltage type plug-in capacitors) are installed, only three-phase power / single-phase power needs to be connected, no other sampling signals are needed, and low-voltage comprehensive treatment can be completed.

[0046] 2. The utility model supports the mode of connecting only single-phase power and has high economy and strong adaptability to installation environment and other factors.

[0047] 3. The utility model uses the passive technical scheme of the voltage type plug-in capacitor, adopts end parallel capacitors to solve the low-voltage problem of the end of the distribution network, and is a relatively economical and reliable compensation means. BRIEF DESCRIPTION OF DRAWINGS

[0048] The above and / or other aspects of the utility model will become more apparent by the following detailed description of the utility model in connection with the accompanying drawings and specific embodiments.

[0049] Figure 1 It is a general structure schematic diagram of an embodiment.

[0050] Figure 2 It is a general structure side view.

[0051] Figure 3 It is a general schematic diagram of a voltage type plug-in capacitor in an embodiment.

[0052] Figure 4 It is a voltage type plug-in capacitor side view.

[0053] In the figure: 1 is the base, 2 is the main box, 3 is the voltage type plug-in capacitor; 11 is the horizontal support, 12 is the support rod, 13 is the clamp, 14 is the base connecting column; 21 is the main box shell, 22 is the box cover, 23 is the back fan, 24 is the lightning arrester, 25 is the internal support frame, 26 is the circuit breaker, 27 is the plug-in capacitor switch; 301 is the capacitor shell, 302 is the handle, 303 is the communication interface, 304 is the display screen and control panel, 305 is the front heat dissipation hole, 306 is the circuit board, 307 is the capacitor main body, 308 is the rear heat dissipation hole, 309 is the capacitor plug-in part, 310 is the bottom sliding rail. DETAILED DESCRIPTION

[0054] The technical scheme of the utility model, the design idea is as follows: adopt installing a set of low-voltage comprehensive treatment compensation cabinet at each treatment point, according to the different on-site conditions, install several low-voltage treatment modules (voltage type plug-in capacitor) in the cabinet, only need to connect three-phase power / single-phase power, without other sampling signals, can complete low-voltage comprehensive treatment.

[0055] As Figure 1 Shown, a kind of low-voltage comprehensive treatment compensation cabinet based on voltage type plug-in capacitor, specific technical scheme is as follows:

[0056] The low-voltage comprehensive treatment compensation cabinet has a main box 2, which is installed and fixed by a base 1. The base 1 can be installed on the ground or a power pole to ensure that the main box 2 has a reliable and stable fixed foundation.

[0057] The voltage type plug-in capacitor 3 is installed in the main box 2 in a plug-in manner for low-voltage comprehensive treatment. According to different on-site conditions, several voltage type plug-in capacitors 3 are installed.

[0058] When the base 1 is installed on the ground, it can only include a base connecting column 14, which is fixed at the bottom of the main box 2 at the upper part and is fixed with a stable ground or other contact surface at the lower part to keep the main box 2 horizontal.

[0059] When the base 1 is installed on a pole-shaped object such as a power pole, it further includes a horizontal support 11 fixedly connected with the bottom of the base connecting column 14, and a clamp 13 fixedly arranged at the end away from the base connecting column 14 to be clamped on the pole-shaped object to prevent it from sliding up and down.

[0060] In order to further prevent the base 1 from sliding along the pole-shaped object such as a telegraph pole, and increase the supporting force of the horizontal support 11, a supporting rod 12 is fixedly arranged at the end of the horizontal support 11 away from the clamp 13, and a clamp 13 is also fixedly arranged at the lower end of the supporting rod 12, which is clamped on the pole-shaped object such as a telegraph pole, and the supporting rod 12 is arranged obliquely downward to form a stable triangular supporting structure with the horizontal support 11 and the pole-shaped object such as a telegraph pole, which is used for stable supporting of the main box body 2.

[0061] As shown in Figure 2 , the main box body 2 is a hollow box body, which comprises a main box body shell 21, the side and front of the main box body shell 21 are open, and a door is arranged. In use, the voltage type plug-in capacitor 3 is inserted and pulled from the front opening. The side opening is used to open the back to operate the equipment in the main box body 2.

[0062] The top of the main box body shell 21 is provided with a box cover 22, which is detachably arranged on the top of the main box body shell 21.

[0063] The back of the main box body shell 21 is provided with a back fan 23, and the corresponding position of the back of the main box body shell 21 is provided with an air outlet for air exchange between the inside and outside of the main box body 2.

[0064] The lower part of the inner side of the back of the main box body shell 21 is fixedly provided with a lightning arrester 24, which is used to avoid damage to various electronic components in the main box body 2 caused by lightning.

[0065] The side of the main box body shell 21 is fixedly provided with an internal support frame 25 corresponding to the opening, and the internal support frame 25 is vertically arranged and used to install the equipment arranged in the main box body 2.

[0066] The internal support frame 25 is provided with a circuit breaker 26 and a plug-in capacitor switch 27, wherein the circuit breaker 26 is used to control the on-off of the electricity in the cabinet and perform overload and short circuit protection; the plug-in capacitor switch 27 is used to control the on-off of the voltage type plug-in capacitor 3 and perform overload and short circuit protection.

[0067] As shown in Figure 3 , the voltage type plug-in capacitor 3 comprises a capacitor shell 301, which is a rectangular sheet structure and is vertically inserted into the main box body 2.

[0068] The front of the capacitor shell 301 is provided with a handle 302, which is used to pull and insert the voltage type plug-in capacitor 3. The front of the capacitor shell 301 is also provided with a communication interface 303, which is used to communicate with the outside world. The front of the capacitor shell 301 is also provided with a display screen and a control panel 304, which is used to set and display the entire voltage type plug-in capacitor 3. The front of the capacitor shell 301 is also provided with a front heat dissipation hole 305, which is used for heat dissipation of the voltage type plug-in capacitor 3.

[0069] As shown in Figure 4As shown, the voltage type plug-in capacitor 3 is internally provided with a capacitor body 307, and a circuit board 306 is mounted on the top inner side, the circuit board 306 is electrically connected with a communication interface 303, a display screen and a control panel 304, and the capacitor body 307, for controlling the voltage type plug-in capacitor 3, and collecting and analyzing voltage data to determine whether the capacitor needs to be put in.

[0070] The voltage type plug-in capacitor 3 is provided with a rear heat dissipation hole 308 on the back surface for heat dissipation, and a capacitor plug-in part 309 is arranged on the lower part of the back surface for plug-in installation of the voltage type plug-in capacitor 3.

[0071] The voltage type plug-in capacitor 3 is a voltage type plug-in capacitor, and the switching logic is different from that of the general plug-in capacitor; the voltage type plug-in capacitor is suitable for end voltage management environment, and the capacitor is put in or cut off according to the end voltage condition, so that the end voltage meets the national standard 220±10%; the Bluetooth communication function is newly added, the running parameters and switching condition of the capacitor can be remotely viewed, remote switching can be realized, and the maintenance personnel can remotely view the equipment running condition after the end management cabinet is installed

[0072] The utility model provides a kind of low voltage comprehensive management compensation cabinet based on voltage type plug-in capacitor, the method and approach of many specific implementation of this technical scheme, above-mentioned only is the preferred implementation mode of the utility model, it should be pointed out, for the ordinary skilled person in the art, under the premise of not departing from the principle of the utility model, still can make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.The components not explicitly in the embodiment can be realized by prior art.

Claims

1. A low-voltage integrated management and compensation cabinet based on voltage-type pluggable capacitors, characterized in that, include: The main housing (2) is installed and fixed by the base (1), and a voltage-type pluggable capacitor (3) for low voltage comprehensive management is installed in the main housing (2) in a pluggable manner. The base (1) is mounted on the ground or a horizontal platform, or the base (1) is mounted on a rod; wherein, When the base (1) is installed on the ground or a horizontal platform, it includes: A base connecting column (14) is fixed at the bottom of the main box (2), and the bottom surface of the base connecting column (14) is connected to the ground or horizontal platform to maintain the horizontal state of the main box (2); When the base (1) is mounted on the rod, it includes: A base connecting column (14) is fixed at the bottom of the main box (2). A horizontal bracket (11) is fixed at the bottom of the base connecting column (14). A clamp (13) is fixed at one end of the horizontal bracket (11) away from the base connecting column (14). The clamp (13) is engaged with the rod-shaped object to prevent it from sliding up and down.

2. The low-voltage comprehensive management and compensation cabinet based on voltage-type pluggable capacitors according to claim 1, characterized in that, A support rod (12) is fixedly provided at one end of the horizontal support (11) away from the clamp (13). The lower end of the support rod (12) is fixedly provided with the clamp (13) and is clamped to the rod-shaped object. The support rod (12) is set obliquely downward and forms a triangular support structure with the horizontal support (11) and the rod-shaped object to stably support the main box (2).

3. A low-voltage integrated management and compensation cabinet based on voltage-type pluggable capacitors according to claim 2, characterized in that, The main housing (2) is a hollow housing, comprising: The main housing (21) has openings on its sides and front, and is provided with doors; a cover (22) is detachably installed on the top of the main housing (21); a fan (23) is provided on the inner side of the back of the main housing (21), and an air outlet is provided on the back of the main housing (21) corresponding to the position of the fan (23) for air exchange between the fan (23) and the inside; a surge arrester (24) is fixedly installed on the lower inner side of the back of the main housing (21).

4. A low-voltage integrated management and compensation cabinet based on voltage-type pluggable capacitors according to claim 3, characterized in that, An internal support frame (25) is fixedly provided on the inner side of the main housing (21) at the position corresponding to the opening. The internal support frame (25) is arranged vertically and is used to install the equipment in the main housing (2).

5. A low-voltage integrated management and compensation cabinet based on voltage-type pluggable capacitors according to claim 4, characterized in that, The internal support frame (25) is equipped with a circuit breaker (26) and a plug-in capacitor switch (27); wherein, the circuit breaker (26) is used to control the on and off of the power in the low voltage integrated management and compensation cabinet, and to provide overload and short circuit protection; the plug-in capacitor switch (27) is used to control the on and off of the voltage-type plug-in capacitor (3), and to provide overload and short circuit protection.

6. A low-voltage integrated management and compensation cabinet based on voltage-type pluggable capacitors according to claim 5, characterized in that, The voltage-type pluggable capacitor (3) includes: The capacitor housing (301) is a hollow cuboid sheet structure, which is vertically inserted and installed in the main housing (2); The capacitor housing (301) is provided with a handle (302) on the front for plugging and unplugging the voltage-type pluggable capacitor (3); the capacitor housing (301) is also provided with a communication interface (303) on the front for communicating with external devices; the capacitor housing (301) is also provided with a display screen and a control panel (304) on the front for setting the voltage-type pluggable capacitor (3) and displaying relevant information; the capacitor housing (301) is also provided with a front heat dissipation hole (305) on the front for heat dissipation of the voltage-type pluggable capacitor (3).

7. A low-voltage integrated management and compensation cabinet based on voltage-type pluggable capacitors according to claim 6, characterized in that, The capacitor housing (301) has a capacitor body (307) fixed inside. A circuit board (306) is installed on the inner top of the capacitor housing (301). The circuit board (306) is electrically connected to the communication interface (303), the display screen and control panel (304) and the capacitor body (307). The capacitor housing (301) has a rear heat dissipation hole (308) on the back for heat dissipation. The lower part of the back of the capacitor housing (301) has a capacitor plug-in part (309) for plugging in the voltage-type pluggable capacitor (3). The bottom surface of the capacitor housing (301) has a bottom slide rail (310) for sliding in and out of the main housing (2) during plugging and unplugging.

8. A low-voltage comprehensive management and compensation cabinet based on voltage-type pluggable capacitors according to claim 7, characterized in that, The number of the voltage-type pluggable capacitors (3) is set to more than one as needed.

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