CN216056338U

CN216056338U - Grouping power distribution system based on limited power supply capacity

Info

Publication number: CN216056338U
Application number: CN202121324767.1U
Authority: CN
Inventors: 张丽娟; 霍伟亮; 张佳; 吴晓晖; 陈玥; 赵春晓
Original assignee: China Institute of Building Standard Design and Research Co Ltd
Current assignee: China Institute of Building Standard Design and Research Co Ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-03-15
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses a grouping power distribution system based on limited power supply capacity, which comprises: with power electric connection's one-level block terminal, the one-level block terminal includes three distribution circuit, be connected with a plurality of second grade block terminals respectively, a plurality of second grade block terminals respectively with a plurality of room regional electrical equipment electric connection, wherein a plurality of second grade block terminals are divided into three groups of block terminals of power capacity size, two powers of every block terminal are located the difference and are divided into groups, three groups of block terminals are supplied power by the three distribution circuit of one-level block terminal respectively, be provided with trinity electrical interlock between the three distribution circuit of one-level block terminal, set up the contact circuit breaker between two optional distribution circuits in the three distribution circuit. The utility model meets the use requirements of electrical equipment in each room under normal steady state and extreme operation scenes under the condition of limited power supply capacity, and has flexible system and protection selectivity.

Description

Grouping power distribution system based on limited power supply capacity

Technical Field

The utility model belongs to the technical field of power distribution system design, and particularly relates to a grouping power distribution system based on limited power supply capacity.

Background

The existing distribution system architecture in China at present is usually that a tail-end distribution box distributes power to each electrical device, a power supply of the tail-end distribution box is led from a total power box, the distribution system design architecture is only suitable for civil or industrial projects (considering the situation that all devices are fully loaded and operated at the same time) with the power capacity of the devices, the distribution system design architecture is not suitable for application scenes in which the load capacity is far larger than the power capacity, because the device power of the load is far larger than the power capacity, when all the devices are fully loaded and operated at the same time, if a traditional distribution form is adopted, an overload protection trip will occur in a higher-level power box, the traditional distribution system architecture cannot meet the selectivity of protection at the moment, and the defect of the trip of the higher-level power supply exists. In particular, in a transformation project, capacity increase of a power supply is often difficult, and the use requirement cannot be solved comprehensively and reasonably, and in order to meet the use requirement of each electrical device in normal steady state and extreme operation scenes under the condition of limited power supply capacity, a distribution electric system which can be flexibly selected and has protection performance needs to be designed urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a grouping power distribution system based on limited power supply capacity, which aims to solve the problem that each electrical device can not be normally used under normal steady-state and extreme operation scenes under the condition that the power supply capacity of the power distribution system is limited.

To achieve the above object, the present invention provides a packet power distribution system based on limited power source capacity, comprising:

with power electric connection's one-level block terminal, the one-level block terminal includes three distribution circuit, three distribution circuit is connected with a plurality of second grade block terminals respectively, a plurality of second grade block terminals respectively with a plurality of regional electrical equipment electric connection in room, wherein a plurality of second grade block terminals are grouped into three group's block terminals of power capacity size, three group's block terminals are supplied power by the three distribution circuit of one-level block terminal respectively, be provided with trinity electrical interlock between the three distribution circuit of one-level block terminal, trinity electrical interlock constitutes electrical interlock distribution circuit with three distribution circuit, set up the contact circuit breaker between two optional distribution circuit in the three distribution circuit, contact circuit breaker and two distribution circuit electric connection.

According to a specific embodiment of the utility model, the secondary distribution box is a dual-power distribution box, the two power sources of which are located in different groups.

According to a specific embodiment of the present invention, the total capacity of the plurality of electrical devices is equal to or less than 1.5 times the capacity of the power source.

According to an embodiment of the utility model, the power supply is connected with the primary distribution box through a first cable, and a first breaker is arranged at a wire inlet end of the first cable and is used for automatically cutting off the current of the first cable when a circuit fault occurs.

According to an embodiment of the utility model, the three distribution circuits of the first-stage distribution box are respectively connected with the main buses of the three groups of second-stage distribution boxes through second cables, and the incoming line end of each second cable is provided with a second circuit breaker which is used for automatically cutting off the current of the second cable when a circuit fault occurs.

According to an embodiment of the present invention, the plurality of secondary distribution boxes are respectively connected to the main buses of the three groups of secondary distribution boxes through third cables, and a third circuit breaker is disposed on the third cables, and the third circuit breaker is configured to automatically cut off current of the third cables when a circuit fault occurs.

According to one embodiment of the utility model, the dual-power distribution box comprises a load switch, wherein the incoming line end of the load switch is connected with a third cable, the outgoing line end of the load switch is connected with a dual-power change-over switch, the dual-power change-over switch is electrically connected with electrical equipment through a fourth cable, a fourth circuit breaker is arranged on the fourth cable, and the fourth circuit breaker is used for automatically cutting off the current of the fourth cable when a circuit fault occurs.

According to one embodiment of the present invention, the three-in-one electrical interlock includes three contactors disposed on three power distribution circuits of the primary distribution box, respectively, and the three contactors are electrically interconnected to form the three-in-one electrical interlock.

Compared with the prior art, the grouping power distribution system based on the limited power supply capacity provided by the utility model has the advantages that the three-in-one electric interlocking device is arranged among the three power distribution loops of the first-stage distribution box, so that only one group of power supplies can be closed under any condition, loads are grouped according to the capacity of electric equipment, the grouped loads are combined in pairs and are distributed by the first-stage distribution box, meanwhile, two groups of the grouped loads are optionally provided with the interconnection switches, and the tail end of the grouped loads is provided with the double-power-supply switching box for distributing the loads. The system can realize the full-load operation of the load of any room area, can also realize the selective operation of the load of other room areas when the load of a certain room is full, and can realize the simultaneous light-load operation of the loads of all rooms.

Drawings

Fig. 1 is a diagram of a room zone group power distribution system of the same equipment capacity provided in accordance with an embodiment of the present invention.

Fig. 2 is a circuit diagram of the interior of the dual power switching box according to an embodiment of the utility model.

Fig. 3 is a diagram of a room zone group power distribution system with different equipment capacities provided in accordance with an embodiment of the present invention.

Reference numerals:

1-a first cable; 2-a first circuit breaker; 3-a second circuit breaker; 4-a second cable; 5-a contactor; 6-a third circuit breaker; 7-a third cable; 8-a load switch; 9-a dual power transfer switch; 10-a fourth circuit breaker; 11-fourth cable.

Detailed Description

The present invention is described in detail below with reference to specific embodiments in order to make the concept and idea of the present invention more clearly understood by those skilled in the art. It is to be understood that the embodiments presented herein are only a few of all embodiments that the present invention may have. Those skilled in the art who review this disclosure will readily appreciate that many modifications, variations, or alterations to the described embodiments, either in whole or in part, are possible and within the scope of the utility model as claimed.

As used herein, the terms "first," "second," and the like are not intended to imply any order, quantity, or importance, but rather are used to distinguish one element from another. As used herein, the terms "a," "an," and other similar terms are not intended to mean that there is only one of the things, but rather that the pertinent description is directed to only one of the things, which may have one or more. As used herein, the terms "comprises," "comprising," and other similar words are intended to refer to logical interrelationships, and are not to be construed as referring to spatial structural relationships. For example, "a includes B" is intended to mean that logically B belongs to a, and not that spatially B is located inside a. Furthermore, the terms "comprising," "including," and other similar words are to be construed as open-ended, rather than closed-ended. For example, "a includes B" is intended to mean that B belongs to a, but B does not necessarily constitute all of a, and a may also include C, D, E and other elements.

The terms "embodiment," "present embodiment," "an embodiment," "one embodiment," and "one embodiment" herein do not mean that the pertinent description applies to only one particular embodiment, but rather that the description may apply to yet another embodiment or embodiments. Those skilled in the art will appreciate that any descriptions made in relation to one embodiment may be substituted, combined, or otherwise combined with the descriptions in relation to another embodiment or embodiments, and that the substitution, combination, or otherwise combination of the new embodiments as produced herein may occur to those skilled in the art and are intended to be within the scope of the present invention.

Example 1

Additional aspects and advantages of embodiments of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the utility model.

The embodiment of the utility model provides a packet power distribution system based on limited power supply capacity, which comprises:

with power electric connection's one-level block terminal, the one-level block terminal includes three distribution circuit, three distribution circuit is connected with a plurality of second grade block terminals respectively, a plurality of second grade block terminals respectively with the regional electrical equipment electric connection in a plurality of rooms, wherein a plurality of second grade block terminals are divided into three group's block terminal of power capacity size, the second grade block terminal is dual supply distribution box, two powers of dual supply distribution box are located different groups, three group's block terminal is respectively by the three distribution circuit power supply of one-level block terminal, be provided with trinity electrical interlock between the three distribution circuit of one-level block terminal, trinity electrical interlock constitutes electrical interlock distribution circuit with three distribution circuit, set up the contact circuit breaker between two optional distribution circuit in the three distribution circuit, contact circuit breaker and two distribution circuit electric connection.

Specifically, the total capacity of the plurality of electrical devices is equal to or less than 1.5 times of the power supply capacity, and when the plurality of electrical devices are operated in full load at the same time, the total capacity of the electrical devices is equal to or less than the power supply capacity, so that the condition that the upper power supply box of each electrical device is subjected to overload protection tripping cannot occur when the electrical devices are operated in full load at the same time.

Specifically, the power is connected with one-level block terminal through first cable 1, and the inlet wire end of first cable 1 is provided with first circuit breaker 2, and first circuit breaker 2 is used for the electric current of automatic cutout first cable 1 when circuit fault. Three distribution circuit of one-level block terminal is connected with the total generating line of three groups of second grade block terminals through second cable 4 respectively, and the inlet wire end of second cable 4 is provided with second circuit breaker 3, and automatic cutout second cable 4's electric current when second circuit breaker 3 is used for circuit fault. A plurality of second grade block terminals are connected with the total generating line of three groups of second grade block terminals through third cable 7 respectively, are provided with third circuit breaker 6 on the third cable 7, and automatic cutout third cable 7's electric current when third circuit breaker 6 is used for circuit fault. Wherein the second grade block terminal is dual supply block terminal, and dual supply switch box still includes load switch 8, and load switch 8's inlet wire end links to each other with third cable 7, and load switch 8's outlet terminal links to each other with dual supply switch 9, and dual supply switch 9 passes through fourth cable 11 and electrical equipment electric connection, wherein is provided with fourth circuit breaker 10 on the fourth cable 11, and automatic cutout fourth cable 11's electric current when fourth circuit breaker 10 is used for circuit fault. By arranging the first circuit breaker 2 on the first cable 1, the second circuit breaker 3 on the second cable 4, the third circuit breaker 6 on the third cable 7 and the fourth circuit breaker 10 on the fourth cable 11, when any line fails, the failed line can automatically cut off current, so that the safety and reliability of the electrical equipment connected with the end of the line can be ensured.

Specifically, trinity electrical interlock is including setting up contactor 5 on the three distribution circuit of one-level block terminal respectively, and three contactor 5 carries out electrical interconnection, constitutes trinity electrical interlock. Because the power supply capacity can only meet the requirement of one group of capacity, the power distribution loops of the three groups of loads need to be electrically interlocked, and only one group of power supplies can be closed under any condition, namely, three-in-one electrical interlocking is ensured.

Specifically, any one of the three power distribution circuits is provided with an interconnection breaker which is electrically connected with the other power distribution circuit. Under the general condition, the interconnection circuit breaker and the corresponding three-in-one electric interlocking loop are in a closed state, so that the condition that all loads run simultaneously during normal steady-state running is realized. Or under the extreme operation scene, any one of the three groups of equipment groups is controlled to fully operate by closing the three-in-one electric interlocking, and the interconnection breaker is disconnected at the moment.

Example 2

Referring to fig. 1 and 2, an embodiment of the present invention provides a room area group distribution system with the same equipment capacity, which is suitable for an electrical system with limited power capacity and supplying power to a plurality of electrical loads or room area electrical equipment with no more than 1.5 times of power capacity, as shown in fig. 1 and 2, the power supply of the distribution system is led from a certain power transformation room, the power supply is electrically connected with a first-stage distribution box through a first cable 1, the first cable 1 is provided with a first breaker 2 for automatically cutting off the current of the first cable 1 when a circuit fault occurs, the first-stage distribution box is divided into three distribution loops, the three distribution loops are respectively electrically connected with a total bus of three sets of second-stage distribution boxes through a second cable 4, the second cable 4 is provided with a second breaker 3 for automatically cutting off the current of the second cable 4 when the circuit fault occurs, wherein the total power capacity of the first-stage distribution box is 100kW, the demand coefficient is 1 (extreme fully-loaded operation scene), the power factor is 0.85, the calculation load is 100kW, the calculation current is 178.75A, a superior power supply can meet the fully-loaded operation of the electrical equipment in two room areas, the total capacity of three rooms is 150kW when the three rooms operate under steady light load, the demand coefficient is 0.65 (normal steady-state operation scene), the power factor is 0.85, the calculation load is 97.50kW, and the calculation current is 174.28A, wherein the capacity of the secondary distribution box of each room is 50kW, the electrical equipment in each room area is distributed by the secondary distribution boxes in the rooms, the total capacities of the electrical equipment in the secondary distribution boxes of the three room areas are all the same and are 50kW, the names of the secondary distribution boxes are 1ACT, 2ACT and 3ACT, namely the distribution box in the room A is 1ACT, the distribution box in the room B is 2ACT, the distribution box in the room C is 3ACT, and considering that the power supply can only meet the fully-loaded operation of the two rooms, the three secondary distribution boxes are combined in pairs and are divided into three paths by the primary distribution box for distribution, namely three groups of rooms A, B, B, C, C and A (three groups of 1ACT and 2ACT, 2ACT and 3ACT and 1 ACT), namely AB, BC and three groups of rooms of AC are distributed by three sections of small buses of a main power supply, so that the condition that the sum of the capacities of all groups of equipment is the same and the capacity of the power supply is guaranteed, wherein each group of equipment comprises electric equipment in two room regions, each secondary distribution box is a dual-power distribution box, each secondary distribution box is connected with the main buses of the three groups of secondary distribution boxes through a third cable 7, and a third breaker 6 is arranged on the third cable 7 and used for automatically cutting off the current of the third cable 7 during circuit faults. Because power capacity can only satisfy one of them group capacity demand, therefore the distribution circuit of three group loads need carry out electric linkage, only can close a set of power under the assurance optional circumstances, the leading-out terminal in the three distribution circuit of one-level block terminal sets up contactor 5 respectively promptly, three contactor 5 interconnects and constitutes trinity electric interlocking, through closing corresponding generating line section of trinity electric interlocking switching, make the arbitrary a set of circular telegram operation in three group's equipment groups, all loads of this equipment group can be full load operation simultaneously like this, so the power can satisfy two rooms and full load operation simultaneously. In addition, any two of the three power distribution circuits are provided with a tie breaker, and the tie breaker is normally in a closed state. In the embodiment of the utility model, the interconnection breaker is arranged between certain two groups of loads, and the distribution loops of the two groups of loads are connected through the interconnection breaker, so that 1ACT, 2ACT and 3ACT can be electrified simultaneously. When all the loads operate simultaneously, the system can optionally operate two groups of the loads, such as ABBC, ABAC and BCAC, so that the loads of the three room areas a, b and c can operate lightly at the same time. The first-stage distribution box provides two paths of power supplies for each group of ABC loads, so that each group of loads are distributed by arranging the dual-power switching box, and normal distribution of the loads is guaranteed. Wherein dual power supply switching box still includes load switch 8, and load switch 8's inlet wire end links to each other with third cable 7, and load switch 8's outlet terminal links to each other with dual power supply switching 9 switches, and dual power supply switching 9 passes through fourth cable 11 and electrical equipment electric connection, wherein is provided with fourth circuit breaker 10 on the fourth cable 11, and fourth circuit breaker 10 is used for the electric current of automatic cutout fourth cable 11 when circuit fault. The grouping power distribution system meets the use requirements of each electrical device under normal steady-state and extreme operation scenes under the condition that the power supply capacity is limited, and the system is flexible and has protection selectivity.

Example 3

Referring to fig. 3, an embodiment of the present invention provides a room area grouping power distribution system with different device capacities, as shown in fig. 3, a power supply of the power distribution system is introduced from a certain transformer substation, and distributes power to 6 rooms, and the power distribution system is divided into three groups ABC loads with substantially the same capacity according to the size of the electrical device capacity, the loads of rooms 1#, 2#, 4# are divided into a group a, the corresponding secondary distribution boxes are 1ACT, 2ACT, and 4ACT, the loads of rooms 3#, 4#, 5#, and 6# are divided into a group B, the corresponding secondary distribution boxes are 3ACT, 4ACT, 5ACT, and 6ACT, the loads of rooms 1#, 2#, 3#, 5#, and 6# are divided into a group C, the corresponding secondary distribution boxes are 1ACT, 2ACT, 3ACT, 5ACT, and 6ACT, wherein the total power supply capacity of the primary distribution box is 176KW, and the total load capacities of the three groups ABC loads are 120.3KW, 118.1KW, and 113.6KW, respectively, the ABC three groups of loads are distributed by three paths through the first-stage distribution box, three-in-one electric interlocking is arranged between three distribution loops of the first-stage distribution box, and meanwhile, an interconnection breaker is arranged on any two paths of the three distribution loops.

The specific power distribution method comprises the following steps:

the power supply of the main distribution box is introduced from a superior (transformer) distribution room, wherein the distribution boxes of a 1# room, a 2# room, a 3# room, a 4# room, a 5# room and a 6# room are respectively 1ACT, 2ACT, 3ACT, 4ACT, 5ACT and 6ACT, and considering that the power supply can only meet the full load operation of partial rooms, the distribution boxes of the rooms are distributed in groups, and are divided into a group of 1#, 2#, and 4# rooms, a group of 3#, 4#, 5#, and 6# rooms, and a group of 1#, 2#, 3#, 5#, and 6# rooms. One-level block terminal sets up three distribution circuit, three distribution circuit sets up the contactor and carries out electrical interlocking and guarantees that three distribution circuit can only trinity under the any circumstance, distribution box 1ACT promptly, 2ACT and 4ACT are a set of, 3ACT, 4ACT, 5ACT and 6ACT are a set of, 1ACT, 2ACT, 3ACT, 5ACT and 6ACT are a set of, three groups of block terminals can only be a set of electricity under any circumstance, because of the one-level block terminal all provides two way power to every room or laboratory, the event is distributed through terminal dual power switching box that sets up, distribution system's reliability is improved. According to the embodiment of the utility model, the interconnection breakers are arranged on the outgoing line loops of the WX1 and the WX2, so that the condition that all rooms run under light load simultaneously is met, and the method is suitable for a normal steady-state running scene.

By analyzing the power distribution system, when room equipment 1#, room equipment 2#, room equipment 4# need to run fully, namely the WX1 loop is electrified to run, when room equipment 3#, room equipment 4#, room equipment 5# and room equipment 6# need to run fully, namely the WX2 loop is electrified to run, when room equipment 1#, room equipment 2#, room equipment 3#, room equipment 5# and room equipment 6# need to run fully, namely the WX3 loop is electrified to run, and when room equipment all need to run lightly, namely the WX1 loop and the interconnection breaker are electrified to run simultaneously in a normal steady-state running scene.

In summary, the grouping power distribution system based on the limited power supply capacity provided by the utility model can realize the full load operation of any room area, can also realize the selective operation of loads of other room areas when a certain room load is fully loaded, and can realize the simultaneous light load operation of all room loads.

The concepts, principles and concepts of the utility model have been described above in detail in connection with specific embodiments (including examples and illustrations). It will be appreciated by persons skilled in the art that embodiments of the utility model are not limited to the specific forms disclosed above, and that many modifications, alterations and equivalents of the steps, methods, apparatus and components described in the above embodiments may be made by those skilled in the art after reading this specification, and that such modifications, alterations and equivalents are to be considered as falling within the scope of the utility model. The scope of the utility model is only limited by the claims.

Claims

1. A packet power distribution system based on limited power source capacity, comprising: with power electric connection's one-level block terminal, the one-level block terminal includes three distribution circuit, and is three distribution circuit is connected with a plurality of second grade block terminals respectively, and is a plurality of the second grade block terminal respectively with a plurality of room regional electrical equipment electric connection, wherein a plurality of the three group's block terminals of second grade block terminal group for power capacity size, three group's block terminal respectively by the three distribution circuit power supply of one-level block terminal, be provided with trinity electrical interlock between the three distribution circuit of one-level block terminal, trinity electrical interlock and three distribution circuit constitutes electrical interlock distribution circuit, and is three optional two in the distribution circuit set up the contact circuit breaker between the distribution circuit, contact circuit breaker and two distribution circuit electric connection.

2. The limited power capacity based packet power distribution system of claim 1, wherein the secondary distribution box is a dual power distribution box having two power sources in different groups.

3. The limited power source capacity based packet power distribution system of claim 1, wherein a total capacity of the plurality of electrical devices is equal to or less than 1.5 times a power source capacity.

4. The limited power source capacity-based packet power distribution system of claim 1, wherein the power source is connected to the primary distribution box via a first cable, and a first circuit breaker is disposed at a line inlet of the first cable, and the first circuit breaker is configured to automatically break a current of the first cable when a circuit fault occurs.

5. The limited power source capacity-based packet power distribution system according to claim 1, wherein the three power distribution circuits of the first-stage distribution box are respectively connected with the main buses of the three groups of second-stage distribution boxes through second cables, and the incoming line ends of the second cables are provided with second circuit breakers, and the second circuit breakers are used for automatically cutting off the current of the second cables when a circuit fault occurs.

6. The limited power source capacity-based packet power distribution system of claim 1, wherein a plurality of said secondary distribution boxes are connected to the main bus of three sets of secondary distribution boxes through third cables, respectively, and a third circuit breaker is disposed on the third cables, and the third circuit breaker is configured to automatically break the current of the third cables when a circuit fault occurs.

7. The limited power capacity based packet power distribution system of claim 2, wherein the dual power source distribution box comprises a load switch, an incoming line end of the load switch is connected to a third cable, an outgoing line end of the load switch is connected to a dual power source change-over switch, the dual power source change-over switch is electrically connected to the electrical equipment through a fourth cable, wherein a fourth circuit breaker is arranged on the fourth cable, and the fourth circuit breaker is used for automatically cutting off the current of the fourth cable when a circuit fault occurs.

8. The limited power capacity based packet power distribution system of claim 1, wherein said three-in-one electrical interlock includes contactors disposed on three power distribution loops of said primary distribution box, respectively, three of said contactors being electrically interconnected to form a three-in-one electrical interlock.