High-power-density electric energy metering box

Abstract

The invention provides a high-power-density electric energy metering box, which comprises a box body, an electric energy metering module, internal vertical beams, internal cross beams, a safe operation controller, a main switch and a branch switch, and is characterized in that the box body forms a main body frame, the internal vertical beams are arranged on the left side and the right side in the box body respectively, and the internal cross beams are arranged on the internal vertical beams respectively; the internal cross beam is mounted in the box body, the internal cross beam is vertically connected with the internal vertical beam, the internal cross beam is fixed on the internal vertical beam through a fastener, and the internal cross beam and the internal vertical beam form a bearing area and form an integral structure with the box body; the electric energy metering module, the safe operation controller, the main switch and the branch switch are arranged in the bearing area; according to the invention, the modularized electric energy metering module with multiple independent measuring units is arranged in a transverse and compact manner so as to accommodate more independent metering channels, and meanwhile, a safe operation controller is configured to identify an abnormal state so as to automatically realize protection.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, in particular to a high power density electric energy metering box. Background Art

[0002] Whether it is the energy consumption of buildings or key energy-consuming units, the first step to achieve energy conservation and carbon reduction is to implement monitoring. Only by quantifying the carbon content can management goals and strengthening measures be formulated. In this context, the high-power density electric energy meter box has been continuously improved and developed into a mature product through practical application in the online monitoring system of energy consumption.

[0003] Building energy consumption detection requires more detailed electricity consumption data for demand analysis, and traditional electricity meter boxes are generally installed in the building's power shaft. Due to the generally small space, ordinary electricity meter boxes can only accommodate about 24-36 electricity meters at most, which is far from meeting the actual needs of the building energy consumption detection system. Summary of the invention

[0004] In order to overcome the above problems existing in the prior art, the present invention provides a high power density electric energy meter box, which adopts the following technical solutions:

[0005] A high power density electric energy metering box, comprising a box body 1, an electric energy metering module 2, an internal vertical beam 3, an internal cross beam 4, a safe operation controller 5, a main switch 6, and a branch switch 7, characterized in that the box body 1 constitutes a main frame, an internal vertical beam 3 is arranged on each of the left and right sides of the box body 1, the internal cross beam 4 is installed inside the box body 1, the internal cross beam 4 is vertically connected to the internal vertical beam 3, the internal cross beam 4 is fixed to the internal vertical beam 3 by a fastener, the internal cross beam 4 and the internal vertical beam 3 constitute a bearing area, and form an integral structure with the box body 1;

[0006] The electric energy metering module 2 , the safe operation controller 5 , the main switch 6 , and the branch switch 7 are arranged in the bearing area; the electric energy metering module 2 , the main switch 6 and the branch switch 7 are fixed on the internal crossbeam 4 .

[0007] Furthermore, at least six electric energy metering modules 2 are configured in the box 1 .

[0008] Furthermore, a mounting rail 401 is mounted on the inner crossbeam 4 , and the electric energy metering modules 2 are mounted in a row on the rail 401 ; and the shunt switches 7 are mounted in a row on the rail 401 .

[0009] Furthermore, the width of the mounting rail 401 is 35 mm.

[0010] Furthermore, the neutral line 201 of the electric energy metering module 2 on the same internal crossbeam 4 is wired in a hand-to-hand manner.

[0011] Furthermore, the current circuit of the electric energy metering module 2 adopts an incoming line 202 and two independent electric energy metering outgoing lines, and the two independent electric energy metering outgoing lines are an electric energy metering outgoing line 1 203 and an electric energy metering outgoing line 204 .

[0012] Furthermore, the electric energy metering modules 2 sequentially arranged in a row are grouped in multiples of three.

[0013] Furthermore, the incoming line 202 of the electric energy metering module is connected to each electric energy metering module 2 according to the principle of three-phase balance, and each electric energy metering module 2 is connected to a data communication line 205 on the non-power line side, which is aggregated to the safety operation controller 5 by the data communication line 205.

[0014] Furthermore, the safe operation controller 5 collects the current data of each electric energy metering module 2 in real time, and automatically performs a power-off operation when the collected data exceeds the preset safe operation parameters of the equipment through calculation by a preset formula.

[0015] Furthermore, the preset formula is a three-phase current unbalance calculation formula. Assuming there are 3n electric energy metering blocks, the specific calculation process is as follows:

[0016]

[0017] Where:

[0018] I a ,I a1 ,...,I an They are the currents of the n electric energy metering blocks connected to phase a of the incoming line;

[0019] I b ,I b1 ,...,I bn They are the currents of the n electric energy metering blocks connected to phase b;

[0020] I c ,I c1 ,...,I cn They are the currents of the n electric energy metering blocks connected to phase c;

[0021] I ag The average value of three-phase current;

[0022] I UR is the unbalance of three-phase current.

[0023] When the imbalance of the acquired three-phase current exceeds the preset safe operating parameters of the equipment, the power-off operation is automatically performed.

[0024] Furthermore, the safe operation controller 5 collects the operating temperature values ​​of each electric energy metering module 2 in real time, and automatically performs a power-off operation when the operating temperature of a certain electric energy metering module 2 exceeds the set safe operation value.

[0025] Furthermore, the safe operation controller 5 collects the voltage value of each electric energy metering module 2 in real time, and automatically performs a power-off operation when the voltage value of a certain electric energy metering module 2 exceeds the set safe operation value.

[0026] The present invention has the following beneficial effects:

[0027] The present invention adopts a modular electric energy metering module with narrow multiple independent measurement units and arranges it compactly horizontally to fully save space, so that more independent metering channels can be accommodated under the condition of almost the same volume of traditional metering boxes, so that 4-5 times more electric energy meters can be accommodated under the condition of almost the same volume of traditional metering boxes, solving the shortcomings of large installation space requirement and high application cost under the existing technical conditions. The electric energy metering box is equipped with a safe operation controller, which can collect real-time three-phase voltage, current, and temperature data. When the safe operation controller recognizes an abnormal state, it performs corresponding protection actions according to preset parameters, greatly improving the safety protection capability and stable operation capability of the product, and the operation is safe and reliable.

[0028] The present invention can accommodate more than about 112 electric energy meters in a single box, and optimize the electric energy meters to one input and two outputs. Since they are completely independent electric energy metering elements, they are equivalent to two electric meters. Therefore, the entire meter box has more than 224 independent logical electric energy metering channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the high power density electric energy metering box of the present invention;

[0030] Figure 2 It is a schematic diagram of the internal beam structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the zero line structure of the present invention;

[0032] Figure 4 Figure 5 This is a schematic diagram of the connection of the input and output lines of the electric energy metering module of the present invention;

[0033] Figure 6 It is a schematic diagram of the connection between the three-phase incoming line, the data communication line and the safe operation controller line of the present invention.

[0034] Description of reference numerals:

[0035] 1. Box; 2. Electric energy metering module; 201. Neutral line; 202. Incoming line of metering module; 203. Outgoing line 1 of electric energy metering; 204. Outgoing line 2 of electric energy metering; 205. Data communication line of metering module; 3. Internal vertical beam; 4. Internal horizontal beam; 401. Mounting rails arranged on the internal horizontal beam; 5. Safe operation controller; 6. Main switch; 7. Branch switch. DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of the high power density electric energy metering box of the present invention. The high power density electric energy metering box includes a box body 1, an electric energy metering module 2, an internal vertical beam 3, an internal horizontal beam 4, a safe operation controller 5, a main switch 6, and a branch switch 7.

[0039] The box body 1 constitutes the main frame, and an internal vertical beam 3 is arranged on the left and right sides of the box body 1. The internal cross beam 4 is installed inside the box body 1. The internal cross beam 4 is vertically connected to the internal vertical beam 3. The internal cross beam 4 is fixed to the internal vertical beam 3 by fasteners. The internal cross beam 4 and the internal vertical beam 3 constitute a bearing area and form an integral structure with the box body 1.

[0040] The electric energy metering module 2 , the safe operation controller 5 , the main switch 6 , and the branch switch 7 are arranged in the bearing area; the electric energy metering module 2 , the main switch 6 and the branch switch 7 are fixed on the internal crossbeam 4 .

[0041] Please refer to Figure 2 , Figure 2It is a schematic diagram of the internal beam structure of the present invention; the internal beam 4 is equipped with a mounting rail 401, and the electric energy metering modules 2 are mounted in a row on the rail 401; the shunt switches 7 are mounted in a row on the rail 401.

[0042] In the embodiment of the present application, the width of the mounting rail 401 is 35 mm.

[0043] Please refer to Figure 3 , Figure 3 It is a schematic diagram of the neutral line structure of the present invention; the neutral line 201 of the electric energy metering module 2 on the same internal beam 4 is connected in a hand-to-hand manner.

[0044] In the embodiment of the present application, the electric energy metering modules 2 arranged in a row are grouped in multiples of three.

[0045] Figure 4 Figure 5 The figure is a schematic diagram of the connection of the input and output lines of the electric energy metering module of the present invention; the current circuit of the electric energy metering module 2 adopts an input line 202 and two independent electric energy metering output lines, and the two independent electric energy metering output lines are electric energy metering output line 1 203 and electric energy metering output line 2 204.

[0046] Figure 6 It is a schematic diagram of the connection between the three-phase incoming line, the data communication line and the safe operation controller line of the present invention.

[0047] The incoming line 202 of the electric energy metering module is connected to each electric energy metering module 2 (i.e. Figure 6 The three-phase power lines L1, L2, and L3 of the power line are evenly connected in parallel to the power metering module 2), and each power metering module 2 is connected to a data communication line 205 on the non-power line side, which is summarized by the data communication line 205 to the safety operation controller 5.

[0048] In the embodiment of the present application, the safe operation controller 5 collects the current data of each electric energy metering module 2 in real time. When the collected data exceeds the preset safe operation parameters of the device according to the preset formula, the power-off operation is automatically performed to protect the safe operation of the high power density electric energy metering box. The preset formula is a three-phase current imbalance calculation formula. Assuming there are 3n electric energy metering blocks, the specific calculation process is as follows:

[0049]

[0050] Where:

[0051] I a ,I a1 ,...,I an They are the currents of the n electric energy metering blocks connected to phase a;

[0052] Ib ,I b1 ,...,I bn They are the currents of the n electric energy metering blocks connected to phase b;

[0053] I c ,I c1 ,...,I cn They are the currents of the n electric energy metering blocks connected to phase c;

[0054] I ag The average value of three-phase current;

[0055] I UR is the unbalance of three-phase current.

[0056] When the imbalance of the acquired three-phase current exceeds the preset safe operating parameters of the equipment, the power-off operation is automatically performed, that is, the electric energy metering modules of the phase with the higher current are cut off in turn.

[0057] In an embodiment of the present application, the safe operation controller 5 collects the voltage values ​​of each electric energy metering module 2 in real time. When the voltage value of a certain electric energy metering module 2 exceeds the set safe operation value, a power-off operation is automatically performed (a power-off operation is performed on the electric energy metering module 2 that causes the voltage abnormality) to ensure the safe operation of the equipment and protect downstream electrical appliances from being damaged by abnormal voltage.

[0058] In an embodiment of the present application, the safe operation controller 5 collects the operating temperature values ​​of each electric energy metering module 2 in real time. When the operating temperature of a certain electric energy metering module 2 exceeds the set safe operation value, a power-off operation is automatically performed (a power-off operation is performed on the electric energy metering module 2 that causes the temperature abnormality) to ensure the safe operation of the equipment.

[0059] The present invention uses a hand-to-hand connection method to connect the neutral lines 201 of multiple electric energy metering modules 2, which can save component installation space. The current circuit of the electric energy metering module 2 uses an incoming line 202 and two independent electric energy metering outgoing lines, and the two independent electric energy metering outgoing lines are electric energy metering outgoing line 1 203 and electric energy metering outgoing line 2 204. Because the electric energy metering module realizes one incoming line and two outgoing lines while ensuring the electrical clearance and creepage distance, and the electric energy metering module adopts a narrow panel design, compared with the installation width of a traditional electric meter, it can accommodate at least 4 logical electric energy meters with the same function.

[0060] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A high power density electric energy metering box, comprising a box body (1), an electric energy metering module (2), an internal vertical beam (3), an internal horizontal beam (4), a safe operation controller (5), a main switch (6), and a branch switch (7), characterized in that: The box body (1) forms a main frame, an internal vertical beam (3) is arranged on both sides of the box body (1), an internal cross beam (4) is installed inside the box body (1), the internal cross beam (4) is vertically connected to the internal vertical beam (3), the internal cross beam (4) is fixed to the internal vertical beam (3) by fasteners, the internal cross beam (4) and the internal vertical beam (3) form a bearing area, and form an integral structure with the box body (1); The electric energy metering module (2), the safe operation controller (5), the main switch (6), and the branch switch (7) are arranged in the bearing area; the electric energy metering module (2), the main switch (6), and the branch switch (7) are fixed on the internal crossbeam (4).

2. The high power density electric energy meter box according to claim 1, characterized in that: At least six electric energy metering modules (2) are arranged in the box (1).

3. The high power density electric energy meter box according to claim 1, characterized in that: The inner crossbeam (4) is equipped with a mounting rail (401), and the electric energy metering modules (2) are mounted in a row on the rail (401); and the shunt switches (7) are mounted in a row on the rail (401).

4. The high power density electric energy meter box according to claim 2, characterized in that: The width of the guide rail (401) is 35 mm.

5. The high power density electric energy meter box according to claim 3, characterized in that: The neutral line (201) of the electric energy metering module (2) on the same internal crossbeam (4) is wired in a hand-to-hand manner.

6. The high power density electric energy meter box according to claim 1, characterized in that: The current circuit of the electric energy metering module (2) adopts an incoming line (202) and two independent electric energy metering outgoing lines, wherein the two independent electric energy metering outgoing lines are electric energy metering outgoing line 1 (203) and electric energy metering outgoing line 2 (204).

7. The high power density electric energy meter box according to claim 3, characterized in that: The electric energy metering modules (2) arranged in a row are grouped in multiples of three.

8. The high power density electric energy meter box according to claim 1, characterized in that: The incoming line (202) of the electric energy metering module is connected to each electric energy metering module (2) according to the principle of three-phase balance. Each electric energy metering module (2) is connected to a data communication line (205) on the non-power line side, and the data is collected by the data communication line (205) to the safety operation controller (5).

9. The high power density electric energy meter box according to claim 1, characterized in that: The safe operation controller (5) collects the current data of each electric energy metering module (2) in real time, and automatically performs a power-off operation when the collected data exceeds the preset safe operation parameters of the device according to a preset formula.

10. The high power density electric energy meter box according to claim 9, characterized in that: The safe operation controller (5) collects the operating temperature values ​​of each electric energy metering module (2) in real time, and automatically performs a power-off operation when the operating temperature of a certain electric energy metering module (2) exceeds a set safe operation value.

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