CN217063384U - Take measurement ammeter case of automatic commutation function - Google Patents
Take measurement ammeter case of automatic commutation function Download PDFInfo
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- CN217063384U CN217063384U CN202123328000.9U CN202123328000U CN217063384U CN 217063384 U CN217063384 U CN 217063384U CN 202123328000 U CN202123328000 U CN 202123328000U CN 217063384 U CN217063384 U CN 217063384U
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Abstract
The utility model discloses a metering ammeter box with automatic phase-changing function, which comprises an intelligent control terminal, a main line current measuring device, a branch current measuring device and a plurality of metering ammeter boxes, wherein the intelligent control terminal, the main line current measuring device, the branch current measuring device and the plurality of metering ammeter boxes are arranged in a power distribution device; the power distribution device is used for distributing a three-phase power grid for power consumers; the metering ammeter box comprises a metering ammeter control end and phase changers respectively connected with three phases of a power grid; the phase converter comprises a normally open relay group and a normally open alternating current contactor group; the control end of the metering ammeter is respectively connected with a power consumer and a phase changer; the normally open type relay group is used for receiving a control signal of a control end of the metering ammeter so as to control the on-off of the contactor; the normally open type alternating current contactor group is used for controlling the phase sequence connected by the user to complete the phase selection of the circuit; the intelligent control terminal is used for receiving data transmitted by the control end of the metering ammeter and sending a commutation instruction to the control end of the metering ammeter. The utility model discloses reduce and implement the degree of difficulty, reduce artifical and equipment cost.
Description
Technical Field
The utility model relates to a distribution network power consumption commutation and electric energy measurement technical field, more specifically relates to a take measurement ammeter case of automatic commutation function.
Background
At present, electric energy metering and three-phase unbalance treatment equipment in a distribution network is separated independently. When the three-phase imbalance problem occurs in the power distribution network, an intelligent automatic phase-changing device or a manual power phase-changing device needs to be installed on a load side line. The manual phase modulation is to switch the phase line of the user to the power failure irregularly according to the power utilization condition of the user so as to reduce the unbalance degree of the three phases; and the intelligent phase-changing device can monitor the current change of each branch in real time and automatically adjust and distribute the load in real time without power failure. The manual phase modulation efficiency is low, power failure needs to be carried out on a transformer area, the electricity consumption of residential users is influenced, manual phase modulation cannot be carried out frequently and timely due to uncertainty of the electricity consumption of the users, and the effect is not ideal; the intelligent commutation device can monitor the current change of each branch in real time, can carry out automatically regulated and distribution to load in real time and without cutting off the power supply, but because the intelligent commutation device comprises master controller and a plurality of commutators, for reaching the effect of administering unbalanced three phases, need look for a plurality of commutators mounting point on the electric user's branch, and realize complicated because of the circuit in the scene, it is very difficult to look for the mounting point, installer's work load has been increased, power supply office distribution equipment's cost also increases.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the higher technical problem of cost among the background art, provide a take metering ammeter case of automatic commutation function, imbed metering ammeter case to the function of administering the unbalanced intelligent commutation device of three-phase to reduce and implement the degree of difficulty, reduce manual work and equipment cost.
In order to solve the problems, the metering ammeter box with the automatic phase change function comprises an intelligent control terminal, a main line current measuring device, a branch current measuring device and a plurality of metering ammeter boxes, wherein the intelligent control terminal, the main line current measuring device, the branch current measuring device and the metering ammeter boxes are arranged in a power distribution device; the power distribution device is used for distributing a three-phase power grid for power consumers; the metering ammeter box comprises a metering ammeter control end and phase changers respectively connected with three phases of a power grid;
the phase converter comprises a normally open relay group and a normally open alternating current contactor group; the control end of the metering ammeter is respectively connected with a power consumer and a phase changer; the normally open type relay group is used for receiving a control signal of a control end of the metering ammeter so as to control the on-off of the contactor; the normally open type alternating current contactor group is used for controlling a phase sequence connected by an electric user to complete line phase selection;
the metering ammeter control end and the intelligent control terminal can carry out carrier communication; the control end of the metering ammeter is connected with the branch current measuring device; the branch current measuring device is used for measuring three-phase current from a power grid to a control end of a metering ammeter; the control end of the metering ammeter is used for metering the electric energy of a power consumer, receiving the data collected by the branch current measuring device, sending data and receiving instructions with the intelligent control terminal, and sending control signals to the normally open relay group;
the intelligent control terminal is connected with the main line current measuring device; the main line current measuring device is used for measuring the three-phase current of the power grid; the intelligent control terminal is used for receiving data transmitted by the control end of the metering ammeter and data of the main line current measuring device to formulate a phase change scheme and sending a phase change instruction to the control end of the metering ammeter.
In particular, the power distribution device comprises a transformer and an intelligent integrated distribution box; the transformer is used for converting 10kV high voltage into 380V low voltage for the intelligent comprehensive distribution box to distribute electric energy; the intelligent comprehensive distribution box receives the voltage output by the transformer and distributes a three-phase power grid for the power consumers.
Specifically, the normally open type alternating current contactor group comprises a contactor KM 1-a contactor KM3, and the contactors KM 1-KM 3 are respectively connected with three phases of a power grid.
Specifically, the normally open relay group includes relays KA1 to KA3 connected to the respective relays KA1 to KA3 connected to contactors KM1 to KM3, respectively.
Particularly, an incoming line 3P + N switch is connected between the power grid and the phase converter.
Particularly, an outgoing line 2P switch is connected between the control end of the metering ammeter and a power consumer.
In particular, the main line current measuring device is a main line current transformer.
In particular, the branch current measuring device is a branch current transformer group; the branch current transformer group comprises a current transformer L1-a current transformer L3, and the current transformers L1-L3 are respectively used for measuring three-phase current between a power grid and a control end of a metering ammeter; and the current transformers L1-L3 are respectively connected with the control end of the metering ammeter.
The utility model discloses following beneficial effect has:
1. the utility model discloses a measurement ammeter case has measurement function, communication and control function, and the three phase current of electric wire netting to measurement ammeter control end that the measurement ammeter control end of measurement ammeter case gathered from receiving branch current measuring device calculates each branch current. The branch current measuring device is particularly provided with a branch current transformer group, and the current of each phase line of each branch line of each power consumer can be detected through a current transformer L1-a current transformer L3 and sent to the intelligent control terminal.
2. The utility model discloses an intelligent control terminal can receive the three phase current that thread current measuring device measured the electric wire netting promptly thread current, still receives this measurement ammeter control end that each measurement ammeter control end sent and branch line current promptly to the three phase current of electric wire netting, according to the thread and the each phase line current circumstances of branch line, through calculating, formulates the commutation scheme, sends the commutation instruction and gives the measurement ammeter control end. When the control end of the metering electric meter receives a commutation command, the on-off of the contactors KM 1-KM 3 is controlled through the relays KM 1-KM 3. The utility model discloses during the master controller function embedding of intelligence commutation device synthesizes the intelligent control terminal of block terminal, the commutator function embedding of intelligence commutation device is to the strapping table case, can use the electric quantity with the measurement user, can administer the unbalanced three phase of electric wire netting again simultaneously.
3. The utility model relates to a route is simple, directly realizes the commutation function in the measurement ammeter case, need not look for the commutator mounting point, reduces and implements the degree of difficulty, has reduced the cost of artifical installation and equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an overall structure diagram of the embodiment of the present invention;
fig. 2 is a circuit structure diagram of a metering electric meter box according to an embodiment of the present invention;
fig. 3 is a working principle block diagram of the intelligent control terminal according to the embodiment of the present invention.
In the figure: 1-metering electric meter control end; 2-incoming line 3P + N switch; 3-2P switch of outgoing line; 4-electricity consumer; KA 1-KA 3: a normally open relay group; KM 1-KM 3: a normally open type AC contactor group; L1-L3: a branch current transformer group; 5-a metering ammeter box; 6-main line current transformer; 7-intelligent comprehensive distribution box; 8, an intelligent control terminal; 9-transformer.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to clearly and clearly define the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model is usually placed when in use, and are used for convenience of description and simplification of description, but do not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
As shown in fig. 1 and fig. 2, the metering ammeter box with the automatic phase-changing function of the present embodiment includes an intelligent control terminal 8, a main line current measuring device, a branch current measuring device, and a plurality of metering ammeter boxes 5, which are disposed in a power distribution device.
The power distribution device is used to distribute a three-phase power network to the power consumers 4. And the electricity consumer 4 is the electricity consumer metered by the electricity meter. The power distribution device comprises a transformer 9 and an intelligent integrated distribution box 7. The transformer 9 is used for converting the 10kV high voltage into 380V low voltage for the intelligent comprehensive distribution box 7 to distribute electric energy. The intelligent comprehensive distribution box 7 receives the voltage output by the transformer 9 and distributes a three-phase power grid to the power consumers 4.
The metering ammeter box 5 comprises a metering ammeter control end 1 and phase changers respectively connected with three phases of a power grid.
The phase converter includes a normally open relay set and a normally open AC contactor set. The normally open type relay group is used for receiving a control signal of the control end 1 of the metering electric meter so as to control the on-off of the contactor. The normally open type AC contactor set is used for controlling the phase sequence connected with the user 4 to complete the phase selection of the circuit. The normally open type alternating current contactor group comprises a contactor KM 1-a contactor KM3, and a contactor KM 1-a contactor KM3 which are respectively connected with three phases of a power grid. The normally open relay group comprises relays KA 1-KA 3 which are respectively connected, and relays KA 1-KA 3 which are respectively connected with contactors KM 1-KM 3. An incoming line 3P + N switch 2 is also connected between the power grid and the phase converter. And the incoming line 3P + N switch 2 is used for accessing the three-phase power of the power grid.
The control end 1 of the metering electric meter is respectively connected with a user 4 and a normally open relay set and a normally open alternating current contactor set of the phase changer. The metering electric meter control terminal 1 and the intelligent control terminal 8 can carry out carrier communication. The control end 1 of the metering electric meter is connected with a branch current measuring device. The branch current transformer group comprises a current transformer L1-a current transformer L3, and a current transformer L1-a current transformer L3 which are respectively used for measuring three-phase current between a power grid and a control end of a metering ammeter. The current transformers L1 to L3 are respectively connected with the control end 1 of the metering ammeter. The metering electric meter control end 1 is used for metering electric energy of a user, can receive data collected by the branch current transformer group, sends data and receives instructions with the intelligent control terminal 8, and can also send control signals to the normally-open relay group. An outgoing line 2P switch 3 is also connected between the control end 1 of the metering ammeter and the user 4. And the outgoing line 2P switch 3 is used for measuring the on-off of the electric energy meter and the power consumer 4.
The intelligent control terminal 8 is connected with the main line current measuring device. The main line current measuring device is a main line current transformer 6 and is used for measuring three-phase current of the power grid. The intelligent control terminal 8 is used for receiving the data transmitted by the control end 1 of the metering electric meter and the data of the main line current transformer 6 to formulate a phase change scheme and sending a phase change instruction to the control end 1 of the metering electric meter.
The embodiment of the utility model provides a theory of operation and application method:
as shown in fig. 3, the intelligent control terminal 8 is configured to receive data transmitted by the metering electric meter control terminal 1, and has functions of electric energy metering, voltage monitoring, power compensation, carrier communication, RS485 communication, and the like, and is configured to communicate with the metering electric meter control terminal 1 via a carrier, receive data transmitted by the metering electric meter control terminal 1 and the main line current transformer 6, make a most reasonable commutation scheme, generate a commutation instruction, send the commutation instruction to the phase changer via the metering electric meter control terminal 1 via a carrier communication mode, switch the phase changer by receiving and executing the commutation instruction, and dynamically adjust the three-phase imbalance by loading.
When the metering meter control end 1 receives a commutation instruction, the on-off of the contactors KM 1-KM 3 is controlled through the relays KM 1-KM 3 to carry out commutation. Such as: the metering electric meter control end 1 receives a command that the main controller requires to be switched to the B phase, the metering electric meter control end 1 sends a command to the relay KA2, after the KA2 is actuated, the contactor KM2 is electrified to actuate, and the power consumer 4 is connected to the B phase of the power grid.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.
Claims (8)
1. The utility model provides a take measurement ammeter case of automatic commutation function which characterized in that: the intelligent control system comprises an intelligent control terminal, a main line current measuring device, a branch current measuring device and a plurality of metering ammeter boxes, wherein the intelligent control terminal, the main line current measuring device, the branch current measuring device and the plurality of metering ammeter boxes are arranged in a power distribution device; the power distribution device is used for distributing a three-phase power grid for power consumers; the metering ammeter box comprises a metering ammeter control end and phase changers respectively connected with three phases of a power grid;
the phase converter comprises a normally open relay group and a normally open alternating current contactor group; the control end of the metering ammeter is respectively connected with a power consumer and a phase changer; the normally open type relay set is used for receiving a control signal of a control end of the metering ammeter so as to control the on-off of the contactor; the normally open type alternating current contactor group is used for controlling the phase sequence connected by the user to complete the phase selection of the circuit;
the metering ammeter control end and the intelligent control terminal can carry out carrier communication; the control end of the metering ammeter is connected with the branch current measuring device; the branch current measuring device is used for measuring three-phase current from a power grid to a control end of a metering ammeter; the control end of the metering ammeter is used for metering the electric energy of a power consumer, receiving the data collected by the branch current measuring device, sending data and receiving instructions with the intelligent control terminal, and sending control signals to the normally open relay group;
the intelligent control terminal is connected with the main line current measuring device; the main line current measuring device is used for measuring the three-phase current of the power grid; and the intelligent control terminal is used for receiving the data transmitted by the control end of the metering ammeter and the data of the main line current measuring device to formulate a phase change scheme and sending a phase change instruction to the control end of the metering ammeter.
2. The metering ammeter box with the automatic phase-changing function as claimed in claim 1, wherein: the power distribution device comprises a transformer and an intelligent comprehensive distribution box; the transformer is used for converting 10kV high voltage into 380V low voltage for the intelligent comprehensive distribution box to distribute electric energy; the intelligent comprehensive distribution box receives the voltage output by the transformer and distributes a three-phase power grid for the power consumers.
3. The metering ammeter box with the automatic phase-changing function as claimed in claim 1, wherein: the normally open type alternating current contactor group comprises a contactor KM 1-a contactor KM3, and the contactors KM 1-KM 3 are connected with three phases of a power grid respectively.
4. The metering ammeter box with the automatic phase-changing function as claimed in claim 1, wherein: the normally open type relay group comprises relays KA 1-KA 3 which are connected respectively, and the relays KA 1-KA 3 are connected with contactors KM 1-KM 3 respectively.
5. The metering ammeter box with the automatic commutation function as claimed in claim 1, wherein: and an incoming line 3P + N switch is connected between the power grid and the phase converter.
6. The metering ammeter box with the automatic commutation function as claimed in claim 1, wherein: and an outgoing line 2P switch is connected between the control end of the metering ammeter and a power consumer.
7. The metering ammeter box with the automatic phase-changing function as claimed in claim 1, wherein: the main line current measuring device is a main line current transformer.
8. The metering ammeter box with the automatic phase-changing function as claimed in claim 1, wherein: the branch current measuring device is a branch current transformer group; the branch current transformer group comprises a current transformer L1-a current transformer L3, and the current transformers L1-L3 are respectively used for measuring three-phase currents between a power grid and a control end of a metering ammeter; and the current transformers L1-L3 are respectively connected with the control end of the metering ammeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123328000.9U CN217063384U (en) | 2021-12-28 | 2021-12-28 | Take measurement ammeter case of automatic commutation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123328000.9U CN217063384U (en) | 2021-12-28 | 2021-12-28 | Take measurement ammeter case of automatic commutation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217063384U true CN217063384U (en) | 2022-07-26 |
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|---|---|---|---|
| CN202123328000.9U Active CN217063384U (en) | 2021-12-28 | 2021-12-28 | Take measurement ammeter case of automatic commutation function |
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| CN (1) | CN217063384U (en) |
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2021
- 2021-12-28 CN CN202123328000.9U patent/CN217063384U/en active Active
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