CN204424772U - Two main transformer four segmentation integrated automation converting stations - Google Patents

Abstract

The utility model provides a four-section comprehensive automatic substation with two main transformers. The substation includes: two 35 kV incoming lines; The low-voltage terminal outputs 10 kV power supply; the segmented four-section 10 kV busbar is respectively connected to the low-voltage terminal of the two main transformers; the capacitor is connected to the 10 kV busbar; the station transformer is connected to the 10KV busbar kilovolt bus. The utility model replaces the seriously aging equipment in the substation, meets the modern control and operation requirements of the modern power grid, improves the safety and stability of the power grid, improves the reliability of equipment operation, and improves the intelligent level of the power grid; the system structure is simple and can be implemented in the existing substation , without the need for new land acquisition, saving costs.

Description

Two main transformer four segmentation integrated automation converting stations

Technical field

The utility model relates to a kind of automating power substation system, is specifically related to a kind of two main transformer four segmentation integrated automation converting stations.

Background technology

The existing old-fashioned transformer station put into operation, 35kV adopts the line-transformer-connection of belt fuser, and 10kV is single busbar connection four section wiring.

Our station normal operating mode is that three 35kV inlet wires supply No. 1, No. 2 respectively, No. 3 main transformers; No. 1 main transformer is for 10kV mono-section of 8 outlet; No. 2 main transformers are for 10kV bis-sections, three sections of each 4 outlets; No. 3 main transformers are for 10kV tetra-sections of 8 outlets.10kV mono-/bis-section of block switch and sectional leading wires are housed between 10kV mono-section and two sections of buses; 10kV tri-/tetra-sections of block switches and sectional leading wires are housed between 10kV tri-sections and four sections of buses; No. 2 main transformers supply 10kV bis-sections, three sections of buses through 10kV lead-in wire respectively by 10kV bis-sections of switches and 10kV tri-sections of switches.Our station current current period No. 1 main transformer and No. 1 capacitor do not put into operation, and in April, 2003, startup puts into operation 10kV mono-section of bus, and 10kV mono-/two-section switch puts into operation simultaneously.

Establish 2 20MVA main transformers in standing, 35/10kV electric pressure, main transformer is DYN11 wiring, and neutral point is through ground resistance earth.3 groups of 3000kvar Capacitor banks are installed in standing and adopt BAM-11/ √ 3-100-1W type capacitor.

35kV switch cubicle is open type, and wherein 35kV circuit breaker is for adopting SW2--35 IV type oil-minimum breaker, and configures CT2-XG II spring operating mechanism.

10kV mono-section of bus-tie circuit breaker cabinet is Changzhou Lan Ling KYN1B-10, and 10kV switch adopts ABB Azipod Oy model VD4.10kV bis-, three, four sections of bus-tie circuit breaker cabinets are the sky, Foochow KYN4A-10, and 10kV switch adopts Tianyu Electric Appliances Co., Ltd., Fuzhou ZN21-12.

Due to historical reasons, existing old Protective Devices for Power includes the PC relay of domestic electromagnetic relay and ABB AB's production.Wherein, main transformer differential relay adopts BCH-1 electromagnetic relay; One/two-section is autotomyed and is adopted the REF543 relay of ABB AB, and what employing was autotomyed in three/tetra-segmentations is ZJ-II electromagnetic relay; 10kV outlet, 10kV capacitor, the protection of 10kV station local coordinate frame adopt DGL series relay and the SPAA 341C2 micromechanical relay of ABB.

Telecontrol equipment uses the DF1331 type RTU (remote terminal unit) (Remote Terminal Unit, RTU) of Dongfang Electronics.Without dispatch data net equipment in standing.

The above these ageing equipment is serious, and operating condition is poor, failure rate is high, has problems in operational reliability and fail safe.

Utility model content

The utility model provides a kind of two main transformer four segmentation integrated automation converting stations, improves the stability of operation of power networks, ensures resident's normal life electricity consumption.

For achieving the above object, the utility model provides a kind of two main transformer four segmentation integrated automation converting stations, and be characterized in, this transformer station comprises:

Two-way 35 kilovolts of inlet wires;

Two main transformers, its high-pressure side respectively circuit connects two-way 35 kilovolts of inlet wires, exports 10 kilovolts of power supplys through step-down low-pressure end;

Four sections of 10 kilovolts of buses of segmentation, its respectively circuit connect the low-pressure end of two main transformers;

Capacitor, its circuit is connected to 10 kilovolts of buses;

Station local coordinate frame, its circuit is connected to 10 kilovolts of buses.

Be connected to a main transformer respectively under the above-mentioned 35 kilovolts of inlet wires of two-way, be connected to four sections of 10 kilovolts of buses of segmentation under two main transformers, on four sections of 10 kilovolts of buses, circuit is connected with capacitor or station local coordinate frame respectively.

Above-mentioned 35 kilovolts of inlet wires are provided with 35 kilovolts of switches.

Above-mentioned 35 kilovolts of switches adopt SF6 circuit breaker, and are configured with spring operating mechanism.

Above-mentioned 10 kilovolts of buses are connected to voltage transformer.

The wiring that above-mentioned 10 kilovolts of buses connect power supply or load is provided with 10 kilovolts of switches.

Above-mentioned 10 kilovolts of switches adopt vacuum circuit-breaker.

The wiring that above-mentioned 10 kilovolts of buses connect power supply or load is provided with current transformer.

Above-mentioned main transformer neutral point ground connection, this neutral ground form adopts low resistance grounding.

Every section of above-mentioned 10 kilovolts of buses are provided with one group of pressure to become and lightning arrester.

The utility model two main transformer four segmentation integrated automation converting station compared to the prior art, its advantage is, the utility model substituted for aging serious equipment in transformer station, meet the modernization controlling run requirement of modern power network, improve and promote electricity net safety stable, lifting means operational reliability, promotes electrical network intelligent level;

The utility model system configuration is simple, can implement in existing transformer station, without the need to newly levying soil, saves cost.

Accompanying drawing explanation

Fig. 1 is the system circuit diagram of the utility model two main transformer four segmentation integrated automation converting station.

Embodiment

Below in conjunction with accompanying drawing, further illustrate specific embodiment of the utility model.

As shown in Figure 1, be the systematic schematic diagram of a kind of two main transformer four segmentation integrated automation converting stations disclosed in the utility model, this transformer station includes two-way 35 kilovolts of inlet wires 1, and 35 kilovolts, every road inlet wire is connected to 35 kilovolts of switches 3 for 1 time.Each 35 kilovolts of inlet wires 1 are connected to a main transformer respectively by its 35 kilovolts of switch 3 circuit.Be separately positioned in two-way 35 kilovolts of inlet wires 1 10 kilovolts of switch gear rooms that two the 35 kilovolts of switches that generate heat all are positioned at transformer station's building, these 35 kilovolts of switches adopt SF6 circuit breaker, and are configured with spring operating mechanism, for being communicated with or disconnecting inlet wire.

Main transformer employing model is the 35kV/10kV transformer of SZ7-20000, and two main transformers under two-way 35 kilovolts of inlet wires 1 lay respectively in discrete transformer chamber of two, transformer station.The high-pressure side circuit of each main transformer is connected to 35 kilovolts of switches 3 on the inlet wire 1 of 35 kilovolts, its place, and changes respective 35kV primary voltage into 10kV and exported by low-pressure end, and main transformer neutral point ground connection, Contact patch is low resistance grounding.

In the present embodiment, the main transformer under two-way 35 kilovolts of inlet wire 1 Zhong mono-35 kilovolts, tunnel inlet wires 1 is respectively the first main transformer 21 and the second main transformer 22.The low-pressure end circuit of the first main transformer 21 is connected with three ends, 10 kilovolts of buses of segmentation and is its power supply, and three 10 kilovolts, end buses are respectively the one 10 kilovolt of bus the 51, the 2 10 kilovolt of bus 52 and the 3 10 kilovolt of bus 53.The low-pressure end circuit of the second main transformer 22 under the inlet wire 1 of 35 kilovolts, another road is connected with one section of the 4 10 kilovolt of bus 54, and is its power supply.

One 10 kilovolt of bus 51 of the first main transformer 21 times segmentations is connected to two capacitors 7, the 2 10 kilovolt of bus 52 and the 3 10 kilovolt of bus 53 are connected to a capacitor 7 or a station local coordinate frame 6 respectively.Second main transformer 22 times is only connected with one article of the 4 10 kilovolt of bus 54, the 4 10 kilovolt of bus 54 is connected to simultaneously a capacitor 7 and a station local coordinate frame 6.

Known by above-described embodiment, under the low-pressure end of every platform main transformer can circuit be connected with segmentation some 10 kilovolts of buses or only circuit be connected with one section of 10 kilovolts of bus.Be connected to capacitor 7 and station local coordinate frame 6 under every platform main transformer simultaneously, and any 10 kilovolts of bus can be connected with a capacitor 7 and/or a station local coordinate frame 6 by circuit.

Capacitor 7 model is LQZBJ-10, and each group capacitor 7 of transformer substation system is arranged in each capacitor chamber respectively, is connected to each self-corresponding 10 kilovolts of buses respectively by cable.In this enforcement, two 35 kilovolts of inlet wires are respectively equipped with a group capacitor 1 time, and every group capacitor all adopts Y-Y connection Y-Y, play inactive power compensation.

Station local coordinate frame 6 model is SCL-63KVA, and it is connected to 10 kilovolts of buses respectively by cable, and the station local coordinate frame that station local coordinate frame 6 body is installed on transformer station is indoor, plays as bed rearrangement transformer station provides the effect of power supply.

Each section 10 kilovolts of buses are all also provided with one group of pressure to become and lightning arrester.This group pressure change and lightning arrester lay respectively in each pressure change/lightning arrester cabinet in 10kV switch gear room, and pressure becomes voltmeter in station provides indicative function, and lightning arrester plays lightning protection effect.

Every section of 10 kilovolts of buses go back circuit and is connected with voltage transformer 8, its model adopts JDZJ-10.

Preferably, be connected between power end (main transformer) and load (station local coordinate frame 6, capacitor 7, pressure become and lightning arrester) thereof at 10 kilovolts of buses and stube cable is all provided with 10 kilovolts of switches 4, these 10 kilovolts of switches 4 adopt 10 kilovolts of voltage switchgears, all 10 kilovolts of switches are all positioned at 10kV switch gear room, all adopt vacuum circuit-breaker, each switch can be communicated with or disconnect corresponding outlet.10 kilovolts of optional ZN-10 of switch 4 model.

In concrete use, this station has outlet switch 16,2, capacitor 10 kilovolts of switches, block switch 2,2, station local coordinate frame 10 kilovolts of switches.

Preferably, be connected between power end (main transformer) and load thereof (station local coordinate frame 6, capacitor 7, pressure become and lightning arrester) at 10 kilovolts of buses stube cable is also provided with the current transformer 9 that model is LCJ-10.

Although content of the present utility model has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection range of the present utility model should be limited to the appended claims.

Claims (10)

1. A four-section integrated automatic substation with two main transformers, characterized in that the substation includes: Two 35kV incoming lines (1); Two main transformers, the high-voltage terminals of which are respectively connected to two 35 kV incoming lines (1), and output a 10 kV power supply through the step-down low-voltage terminal; segmented four-section 10 kV busbars, respectively circuit-connected to the low-voltage terminals of the two main transformers; a capacitor (7) circuit connected to said 10 kV bus; The station uses a transformer (6), whose circuit is connected to the 10 kV bus. 2. The four-section comprehensive automatic substation with two main transformers as claimed in claim 1, characterized in that, the two 35 kV incoming lines (1) are respectively connected with a main transformer, and the two main transformers are connected with The segmented four-section 10-kilovolt busbars are respectively circuit-connected with capacitors (7) or station transformers (6). 3. The integrated automatic substation with two main transformers and four sections according to claim 1, characterized in that, the 35 kV incoming line (1) is provided with a 35 kV switch (3). 4. The integrated automatic substation with two main transformers and four sections according to claim 3, characterized in that, the 35 kV switch (3) adopts SF6 circuit breaker and is equipped with a spring operating mechanism. 5. The integrated automatic substation with two main transformers and four subsections according to claim 1, characterized in that a voltage transformer (8) is connected to the 10 kV bus. 6. The two-main-transformer four-section integrated automatic substation according to any one of claims 1 to 5, wherein a 10 kV switch is provided on the wiring of the 10 kV bus connecting the power supply or the load (4). 7. The integrated automatic substation with two main transformers and four subsections according to claim 5, characterized in that the 10 kV switch (4) adopts a vacuum circuit breaker. 8. The two-main-transformer four-section integrated automatic substation according to any one of claims 1 to 5, wherein a current transformer ( 9). 9. The two-main-transformer four-section integrated automated substation according to claim 1, wherein the neutral point of the main transformer is grounded, and the neutral point grounding is grounded with a small resistance. 10. The four-section integrated automatic substation with two main transformers as claimed in claim 1 is characterized in that a group of voltage transformers and lightning arresters are installed on each section of the 10 kV bus.