CN210608549U

CN210608549U - Box-type substation distribution system

Info

Publication number: CN210608549U
Application number: CN201921869620.3U
Authority: CN
Inventors: 刘春富
Original assignee: Tianjin Baitong Electric Power Technology Development Co Ltd
Current assignee: Tianjin Baitong Electric Power Technology Development Co Ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-05-22
Anticipated expiration: 2029-11-01

Abstract

The utility model discloses a box-type substation distribution system, including first combination switch cabinet and second combination switch cabinet, first combination switch cabinet with all be equipped with the generating line in the second combination switch cabinet, the generating line is used for regular and the circuit among the linked switch cabinet, first combination switch cabinet includes high-pressure inlet wire circuit and combination vary voltage circuit, and second combination switch cabinet includes that the low pressure receives total circuit, capacitance compensation circuit and low pressure feed circuit, high-pressure inlet wire circuit one end and outside cable junction, the other end with combination vary voltage circuit is through first bus connection, combination vary voltage circuit output with the low pressure receives total circuit to pass through the second bus connection, the low pressure receives total circuit capacitance compensation circuit with low pressure feed circuit is through third bus connection. The system is definite in functional partition, simple in structure, simple and clear in circuit, and easy to install and maintain and repair in later period.

Description

Box-type substation distribution system

Technical Field

The utility model relates to a transformer substation technical field, concretely relates to box-type substation distribution system.

Background

As the box-type transformer substation is complete equipment, is convenient to install and has more applicable places, the box-type transformer substation is widely applied to more places along with the development of urban modern construction. Meanwhile, the box-type substation integrates high-voltage switch equipment, a distribution transformer and a low-voltage distribution device, so that the system has various and complex lines and is not easy to maintain and repair daily.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a box-type substation distribution system.

In order to achieve the above object, the present invention provides the following technical solutions:

the box-type substation power distribution system comprises a first combined switch cabinet and a second combined switch cabinet, wherein buses are arranged in the first combined switch cabinet and the second combined switch cabinet and used for arranging and connecting circuits in the switch cabinets, the first combined switch cabinet comprises a high-voltage incoming line circuit, a combined transformation circuit and a first bus, the second combined switch cabinet comprises a low-voltage receiving main circuit, a capacitance compensation circuit, a low-voltage feed circuit, a second bus and a third bus, one end of the high-voltage incoming line circuit is connected with an external cable, the other end of the high-voltage incoming line circuit is connected with the first bus, the input end of the combined transformation circuit is connected with the first bus, the output end of the combined transformation circuit is connected with the low-voltage receiving main circuit through the second bus, and the low-voltage receiving main circuit, the capacitance compensation circuit and the low-voltage feed circuit are connected through the third bus.

The utility model discloses in, it is preferred, high-pressure inlet wire circuit includes load switch QL, arrester FA and electrified display GSN, high-pressure inlet wire circuit and input 10KV cable junction, load switch QL establishes ties between cable and the first generating line, arrester FA with electrified display GSN one end with cable junction, other end ground connection.

The utility model discloses in, preferred, the combination vary voltage circuit includes that transformer T and transformer are qualified for the next round of competitions, the transformer be qualified for the next round of competitions one end with first bus connection, the transformer is gone out and is connect earthing switch QL and high-voltage fuse FU on the line, earthing switch QL with high-voltage fuse FU establishes ties after with transformer T connects, the transformer T other end with the second bus connection, the vary voltage circuit has connect electrified display GSN.

The utility model discloses in, preferred, the low pressure receives the main circuit including metering device, circuit breaker QF, current transformer CT and surge protector, the low pressure receives a termination second generating line of main circuit, another termination third generating line, metering device circuit breaker QF with current transformer CT establishes ties, surge protector includes fuse FU and arrester FA, fuse FU one end connects current transformer CT, another termination arrester FA, arrester FA other end ground connection.

The utility model discloses in, it is preferred, the reactive power compensator C that the capacitance compensation circuit includes circuit breaker QF, current transformer CT, circuit breaker QF, contactor KM, arrester FA and three electric capacity and constitutes, capacitance compensation circuit one end is connected with the third generating line, is establishing ties in proper order circuit breaker QF current transformer CT circuit breaker QF with contactor KM connects afterwards reactive power compensator C.

The present invention provides a low voltage feeder circuit, which comprises six branches, each branch is connected to a third bus, and each branch comprises a circuit breaker, wherein the circuit breakers are connected in series in the branches.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses divide into first combination cubical switchboard and second combination cubical switchboard, realize the functional partition through the cubical switchboard, be provided with the generating line simultaneously in each cubical switchboard, the generating line realizes the connection between each circuit as basic connecting wire for the circuit is simple and easy clear, easily installs and later maintenance and maintenance.

Drawings

Fig. 1 is the box-type substation distribution system electric schematic diagram of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1, the utility model provides a box-type substation distribution system, including first combination switch cabinet and second combination switch cabinet, first combination switch cabinet includes high-pressure inlet wire circuit 1 and combination vary voltage circuit 2, second combination switch cabinet includes that the low pressure receives total circuit 3, capacitance compensation circuit 4 and low pressure feeder circuit 5, high-pressure inlet wire circuit 1 and outside cable junction, the input of outside cable is 10KV electric energy, high-pressure inlet wire circuit 1 is connected through first generating line with combination vary voltage circuit 2, combination vary voltage circuit 2 inputs second combination switch cabinet, combination vary voltage circuit 2 falls to the low pressure through the second generating line and receives total circuit 3 after 0.4KV electric energy with the 10KV electric energy of input, the low pressure receives total circuit 3, capacitance compensation circuit 4 is connected through the third generating line with low pressure feeder circuit 5.

In this embodiment, the high-voltage incoming line circuit 1 includes a load switch QL1, a lightning arrester FA1 and an electrified display GSN1, the high-voltage incoming line circuit 1 is connected with an input 10KV cable, the load switch QL1 is connected in series between the cable and a first bus, one end of the lightning arrester FA1 and the electrified display GSN1 is connected with the cable, and the other end is grounded, wherein the load switch QL1 is in a closed state under normal conditions, when the current in the high-voltage incoming line circuit is overloaded, the load switch QL1 is disconnected, so as to cut off the rated load current and a certain overload current, the lightning arrester FA1 makes the current generated by the lightning flow to the ground, so as to protect the equipment from being attacked by the lightning surge waves, and the electrified display GSN1 displays a red light when the high-voltage incoming line circuit 1 is electrified, thereby warning people that the.

In the embodiment, the combined transformation circuit 2 comprises a transformer outgoing line 2-1 and a transformer T, the transformer T converts the input 10KV electric energy into 0.4KV electric energy, one end of the transformer outgoing line 2-1 is connected with a first bus, the transformer outgoing line 2-1 is connected with a grounding switch QL2 and a high-voltage fuse FU1, the grounding switch QL2 is connected with the high-voltage fuse FU1 in series and then connected with the transformer T, the other end of the transformer T is connected with a second bus, wherein the grounding switch QL2 is closed during system operation and is disconnected during system maintenance, no current passes through the circuit, the self safety of maintenance personnel is ensured, when the high-voltage fuse FU1 generates short circuit and overload condition in the circuit, a fuse in the fuse generates heat and melts, the high-voltage fuse is disconnected, thereby protecting the system from damage of overload and short-circuit current, the transformation circuit is connected with a live display GSN2, the live display GSN2 displays red light during the live operation of the combined, thereby warning people that the high voltage system is electrified.

In the embodiment, the low voltage receiving main circuit 3 comprises a metering instrument, a breaker QF1, a current transformer CT1 and a surge protector, wherein one end of the low voltage receiving main circuit 3 is connected with the second bus, the other end of the low voltage receiving main circuit is connected with the third bus, the metering instrument, the breaker QF1 and the current transformer CT1 are connected in series, the surge protector comprises a fuse FU2 and an arrester FA2, one end of the fuse FU2 is connected with the current transformer CT1, the other end of the fuse FU2 is connected with the arrester FA2, and the other end of the arrester FA2 is grounded, wherein the metering instrument is a standard metering instrument provided by an electric power office and used for; the circuit breaker QF1 is closed in normal operation, when short circuit and overload are found in the low-voltage receiving main circuit 3, high current flows through an induction coil in the circuit breaker QF1 to generate a large magnetic field, and a lever is pushed to rapidly trip the circuit breaker QF1, so that the low-voltage receiving main circuit 3 is cut off; the current transformer CT1 converts the input current from 1500A to 5A for output by electromagnetic induction between windings, which is convenient for accessing meters such as an ammeter when needed; the surge protector releases voltage through arc discharge in the surge protector when indirect lightning and direct lightning influence or other transient overvoltage generation surges appear in the circuit, so that the protection system cannot be damaged.

In this embodiment, the capacitance compensation circuit 4 includes a breaker QF2, a current transformer CT2, a breaker QF3, a contactor KM, a lightning arrester FA3 and a reactive compensation device C composed of three capacitors, one end of the capacitance compensation circuit 4 is connected with a third bus, and the reactive compensation device C is connected after the breaker QF2, the current transformer CT2, the breaker QF3 and the contactor KM are sequentially connected in series, wherein the breaker QF2 and the breaker QF3 are closed in normal operation, when short circuit and overload occur in the capacitance compensation circuit 4, a very high current flows through induction coils in the breakers QF2 and QF3 to generate a very large magnetic field, and a lever is pushed to rapidly trip the breakers QF2 and QF3, so as to cut off the capacitance compensation circuit 4; the current transformer CT2 plays a role in electrical isolation through electromagnetic induction between windings, and is convenient to be connected to meters such as an ammeter and the like when needed; the contactor KM is connected with an external switch, and the opening and closing of the contactor KM are controlled by pressing the external switch, so that the capacitance compensation circuit 4 is controlled; the lightning arrester FA3 flows the current generated by lightning to the ground, so as to protect the equipment from being attacked by lightning shock waves; three capacitors with complementary characteristics are connected in series in the reactive compensation device C, and the reactive capacitive current of the capacitor leading the voltage counteracts the reactive inductive current lagging the voltage, so that the active power component in the system is increased, and the overall power supply efficiency of the system is improved.

In the present embodiment, the low-voltage feeding circuit 5 outputs the converted electric energy, and includes six branches in total, each branch is connected to the third bus, each branch includes a circuit breaker, the circuit breakers are connected in series in the branch, and are closed during normal operation, when a short circuit and an overload occur, a high current flows through an induction coil in the circuit breaker to generate a large magnetic field, and a lever is pushed to rapidly trip the circuit breaker, thereby cutting off the branch.

The working principle is as follows: the cable is connected to a high-voltage incoming line circuit 1 in a box-type substation, 10KV electric energy is input into the box-type substation, the 10KV electric energy enters a transformer T through a transformer outgoing line (2-1), the transformer T converts the 10KV electric energy into 0.4KV electric energy and inputs the KV electric energy into a second bus, the second bus is connected with a low-voltage receiving main circuit 3, the electric energy flows to the low voltage receiving main circuit 3 firstly and is measured by a measuring instrument in the main circuit 3, the 0.4KV electric energy is input into a third bus through a breaker QF1, a current transformer CT1 and the like, a reactive power compensation device C in a capacitance compensation circuit 4 connected with the third bus improves the overall power supply efficiency of the system, and the electric energy finally flows out of a low-voltage feed circuit 5 connected with.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. Distribution system of box-type substation, including first combination cubical switchboard and second combination cubical switchboard, its characterized in that, first combination cubical switchboard with all be equipped with the generating line in the second combination cubical switchboard, the generating line is used for neatly and connects the circuit in each cubical switchboard, first combination cubical switchboard includes high-pressure inlet wire circuit (1), combination vary voltage circuit (2) and first generating line, and second combination cubical switchboard includes that low pressure receives total circuit (3), capacitance compensation circuit (4), low pressure feeder circuit (5), second generating line and third generating line, high-pressure inlet wire circuit (1) one end and external cable connection, the other end and first generating line connection, combination vary voltage circuit (2) input is connected with first generating line, the output with low pressure receives total circuit (3) to pass through the second generating line connection, low pressure receives total circuit (3), And the capacitance compensation circuit (4) is connected with the low-voltage feed circuit (5) through a third bus.

2. The box substation distribution system according to claim 1, wherein the high voltage incoming line circuit (1) comprises a load switch QL1, a surge arrester FA1 and a live display GSN1, the high voltage incoming line circuit (1) is connected to an incoming 10KV cable, the load switch QL1 is connected in series between the cable and the first bus bar, and the surge arrester FA1 and the live display GSN1 are connected to the cable at one end and to ground at the other end.

3. The box-type substation power distribution system according to claim 1, wherein the combined transformation circuit (2) comprises a transformer T and a transformer outgoing line (2-1), one end of the transformer outgoing line (2-1) is connected with the first bus, a grounding switch QL2 and a high-voltage fuse FU1 are connected to the transformer outgoing line (2-1), the grounding switch QL2 is connected with the transformer T after being connected with the high-voltage fuse FU1 in series, the other end of the transformer T is connected with the second bus, and the transformation circuit is connected with a live display GSN 2.

4. The box-type substation power distribution system according to claim 1, characterized in that the low voltage controlled main circuit (3) comprises a metering instrument, a breaker QF1, a current transformer CT1 and a surge protector, wherein the low voltage controlled main circuit (3) is terminated with a second bus and a third bus at one end, the metering instrument, the breaker QF1 and the current transformer CT1 are connected in series, the surge protector comprises a fuse FU2 and an arrester FA2, the fuse 2 is terminated with the current transformer FU1 at one end and the arrester FA2 at the other end, and the arrester FA2 is grounded at the other end.

5. The box substation power distribution system according to claim 1, wherein the capacitance compensation circuit (4) comprises a breaker QF2, a current transformer CT2, a breaker QF3, a contactor KM, a lightning arrester FA3 and a reactive power compensation device C consisting of three capacitors, wherein the capacitance compensation circuit (4) is connected with a third busbar at one end and is followed by the reactive power compensation device C after the breaker QF2, the current transformer CT2, the breaker QF3 and the contactor KM are connected in series in sequence.

6. A substation distribution system according to claim 1, characterized in that the low voltage feeder circuit (5) comprises six branches, each branch being connected to the third bus bar, each branch comprising a circuit breaker, the circuit breakers being connected in series in the branch.