CN203180541U

CN203180541U - Pole-mounted automatic reactive power compensator

Info

Publication number: CN203180541U
Application number: CN 201320169620
Authority: CN
Inventors: 周蔚; 姚建华; 吴宇红; 宋云轩; 方百荣
Original assignee: DEQING POWER SUPPLY BUREAU; State Grid Corp of China SGCC
Current assignee: DEQING POWER SUPPLY BUREAU; State Grid Corp of China SGCC
Priority date: 2013-04-08
Filing date: 2013-04-08
Publication date: 2013-09-04
Anticipated expiration: 2023-04-08

Abstract

The utility model discloses a pole-mounted automatic reactive power compensator. The automatic reactive power compensator comprises a stainless steel moulding housing in which a wire inlet/outlet unit and an automatic reactive power compensation unit are arranged and are spaced apart by a stainless steel separator plate. The wire inlet/outlet unit comprises a residual current action protector and the automatic reactive power compensation unit comprises a first zinc lightning arrester, a second zinc lightning arrester and a third zinc lightning arrester. The upper end of the residual current action protector is electrically connected with one end of the first zinc lightning arrester, the second zinc lightning arrester and the third zinc lightning arrester; and a stainless steel moulding housing together with the other end of the first zinc lightning arrester, the second zinc lightning arrester and the third zinc lightning arrester is connected with a ground terminal. According to the utility model, the automatic reactive power compensator is arranged on the telegraph pole which is positioned at a place 2/3 or 4/5 of the whole distance of a rural low voltage distribution network away from the head end of the rural low voltage distribution network. The wire inlet/outlet unit of the automatic reactive power compensator comprises the residual current action protector which can realize intermediate protection; and zinc lightning arresters are provided to protect the automatic reactive power compensator against the lightning stroke.

Description

A kind of bar following formula auto-reactive compensation device

Technical field

The utility model relates to bar following formula auto-reactive compensation device.

Background technology

Along with rural households' living standard improves year by year, the household electrical appliance utilization rate increases swift and violent, and according to my office's electricity sales amount statistics, urban residents' household electricity is annual to be increased by about 25%.Therefore in recent years, in order to improve the quality of voltage of rural area, generally in market town and plains region, adopted the quality of voltage that the densely covered point methods of public change is alleviated the rural area to descend.But be located in the mountain area, because the user disperses reason, this method is obviously improper, be exactly with the public varying capacity increase in rural area and now power supply enterprise can do, problem is high-power transformer, can promote the public quality of voltage that becomes the next door user, but because of low-voltage supply line long, terminal temperature difference number and be wholely public to become 1/3, the quality of voltage that how effectively to solve the low-voltage distribution network terminal temperature difference is that power supply enterprise is explored and research direction.

The utility model content

Technical problem to be solved in the utility model just provides a kind of bar following formula auto-reactive compensation device, improves rural area low-voltage distribution network terminal voltage quality problems.

For solving the problems of the technologies described above; the utility model adopts following technical scheme: a kind of bar following formula auto-reactive compensation device; comprise the stainless steel molded case; be provided with turnover line unit and auto-reactive compensation unit in the described shell; described turnover line unit and auto-reactive compensation unit are separated by stainless steel separator; it is characterized in that: described turnover line unit comprises RCD; described auto-reactive compensation unit includes the zinc lightning arrester No. 1; No. 2 zinc lightning arresters; No. 3 zinc lightning arresters; described RCD upper end and No. 1 zinc lightning arrester; No. 2 zinc lightning arresters and No. 3 zinc lightning arresters are electrically connected described No. 1 zinc lightning arrester; No. 2 zinc lightning arresters and No. 3 zinc lightning arrester other ends are connected with earth terminal with the stainless steel molded case again.

Preferably; described auto-reactive compensation unit also comprises circuit breaker; the auto-reactive compensation controller; No. 1 circuit breaker; No. 2 circuit breakers; No. 3 circuit breakers; No. 1 the branch plerosis is run the pass jointly; be total to plerosis No. 1 and run the pass jointly; be total to plerosis No. 2 and run the pass jointly; No. 1 capacitor; No. 2 capacitors; No. 3 capacitors; described RCD upper end links to each other with the circuit breaker upper end; the circuit breaker lower end; No. 1 circuit breaker; be total to plerosis No. 1 and run the pass jointly; No. 1 capacitor links to each other; the circuit breaker lower end again with No. 2 circuit breakers; No. 2 altogether plerosis run jointly to close and link to each other with No. 2 capacitors, the circuit breaker lower end again with No. 3 circuit breakers; No. 1 branch plerosis is run jointly to close and is linked to each other with No. 3 capacitors.

Preferably, adopt three-phase and four-line to link to each other with the auto-reactive compensation controller on the described RCD.

Preferably, described turnover line unit also comprises No. 1 current transformer, No. 2 current transformers, No. 3 current transformers, and described No. 1～No. 3 current transformers link to each other with current sampling circuit in the auto-reactive compensation controller.

Preferably, described auto-reactive compensation controller inside includes control and scale unit, and described auto-reactive compensation controller front is equipped with LCD and is connected with scale unit with control.

Preferably, the control in the described auto-reactive compensation controller links to each other with No. 1～No. 3 relays respectively with scale unit.

Preferably, plerosis is run the pass jointly to first relay in the described auto-reactive compensation controller altogether with first, plerosis is run the pass jointly to second relay altogether with second, the 3rd relay is run the pass jointly with first fen plerosis and linked to each other.

Preferably, this bar following formula auto-reactive compensation device is installed in the rural area low-voltage distribution network apart from head end 2/3 or 4/5 place.

The utility model at the rural area low-voltage distribution network apart from head end 2/3 or 4/5 place's mounting rod following formula auto-reactive compensation device; in this device turnover line unit RCD is installed; can play the middle rank protection, this device is equipped with the zinc lightning arrester in addition, can play anti-lightning strike protection.The auto-reactive compensation device can carry out reactive power compensation according to the low-voltage distribution network electric current, as everyone knows, the low-voltage distribution network power factor (PF) improves, equally can the booster tension quality, so this device is to solve present rural area low-voltage distribution network reduces terminal temperature difference because radius of electricity supply is long quality of voltage effectively.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further described:

Fig. 1 is the utility model structure principle chart.

Embodiment

Schematic diagram below in conjunction with Fig. 1 specifies the utility model.

Consult Fig. 1, the utility model bar following formula auto-reactive compensation device comprises and is provided with turnover line unit and auto-reactive compensation unit in the stainless steel molded case.Turnover line unit comprises: inlet wire 1, No. 1 current transformer 2, No. 2 current transformers 3, No. 3 current transformers 4, RCD 5, outlet 6.The auto-reactive compensation unit comprises: No. 1 zinc lightning arrester 7, No. 2 zinc lightning arresters 8, No. 3 zinc lightning arresters 9, circuit breaker 10, auto-reactive compensation controller 26, No. 1 circuit breaker 17, No. 2 circuit breakers 18, No. 3 circuit breakers 19, No. 1 altogether plerosis run jointly close 20, No. 2 altogether plerosis run jointly and close 21, No. 1 branch plerosis and run jointly and close 22, No. 1 capacitors 23, No. 2 capacitors 24, No. 3 capacitors 25.Auto-reactive compensation control 26 comprises: current sampling circuit 11, LCD12, control and scale unit 13, No. 1 relay 14, No. 2 relays 15, No. 3 relays 16.

By 3 current transformer real-time current sampled datas, through auto-reactive compensation controller 26 built-in current sample circuits 11, carry out reaching control and scale unit 13 after data are amplified through this circuit then, establish the ATT7022B chip in control and the scale unit 13 and carry out data operation, contrast and storage, as A, B, C certain phase reactive power mutually owes the added time, run pass the 22 and the 3rd capacitor 25 jointly by controlling with first fen plerosis of scale unit 13 transmission the 3rd relay 16 closed connections, divide benefit electric capacity to put into operation, utilize to divide to mend and to reduce rural area low-voltage circuit three-phase imbalance probability of happening, stabilizing low voltage distribution quality of voltage.If control is that three phase reactive power is owed the added time with scale unit 13 operation results, control and scale unit 13 send No. 2 relays 15 closed connect No. 2 altogether plerosis run jointly and close 21 and No. 2 capacitors 24 and connect, capacitor moves.After this group capacitor puts into operation, collect data by sample circuit 11 again, after control and scale unit 13 are obtained a result, if reactive power is still when owing to mend state, sent instructions again No. 1 relay 14 closures with scale unit 13 by control, connects No. 1 altogether plerosis run the pass jointly and No. 1 capacitor puts into operation.

When 3 current transformer sampled datas, through auto-reactive compensation controller 26 built-in current sample circuits 11, carry out reaching control and scale unit 13 after data are amplified through this circuit then, control is carried out data operation with scale unit 13, it's the added time if being three phase reactive power, pasts operation result, according to control and the scale unit 13 record capacitance group group number that puts into operation, send instruction, allow its corresponding relay, common (benefit) combination switch, capacitor disconnect, excise the capacitor that puts into operation, the auto-reactive compensation device withdraws from the reactive power compensation state.

Leak electricity to back segment low-voltage distribution network circuit when running into from bar following formula auto-reactive compensation device outlet 6; its leakage current is during greater than RCD 5 operating currents; RCD 5 tripping operations are played protection from the bar following formula auto-reactive compensation device outlet 6 electric leakage potential safety hazards to back segment low-voltage distribution network circuit.And the wiring of auto-reactive compensation device is to insert from these RCD 5 upper ends; therefore; even if RCD 5 tripping operation lower end dead electricity, but this auto-reactive compensation device still can be owed the added time and put into operation as usual in that the low-voltage distribution network circuit is idle.As everyone knows, the reactive power of greatest benefit was the upper level circuit that device inserts after reactive power compensator put into operation.Therefore this covering device namely can be protected the electric leakage at outlet 6 places, can also allow the upper level circuit obtain reactive power compensation simultaneously.

Zinc lightning arrester 9 be in the auto-reactive compensation device is struck by lightning on the bar after, produce overvoltage, utilize its zinc oxide that good non-linear voltage-current characteristic is arranged, so resistance sharply descends, its superpotential energy of can releasing immediately reaches the effect of this device of protection.

The above only is specific embodiment of the utility model, but technical characterictic of the present utility model is not limited thereto, any those skilled in the art is in field of the present utility model, and the variation of doing or modification all are encompassed among the claim of the present utility model.

Claims

1. bar following formula auto-reactive compensation device; comprise the stainless steel molded case; be provided with turnover line unit and auto-reactive compensation unit in the described shell; described turnover line unit and auto-reactive compensation unit are separated by stainless steel separator; it is characterized in that: described turnover line unit comprises RCD; described auto-reactive compensation unit includes the zinc lightning arrester No. 1; No. 2 zinc lightning arresters; No. 3 zinc lightning arresters; described RCD upper end and No. 1 zinc lightning arrester; No. 2 zinc lightning arresters and No. 3 zinc lightning arresters are electrically connected described No. 1 zinc lightning arrester; No. 2 zinc lightning arresters and No. 3 zinc lightning arrester other ends are connected with earth terminal with the stainless steel molded case again.

2. bar following formula auto-reactive compensation device according to claim 1; it is characterized in that: described auto-reactive compensation unit also comprises circuit breaker; the auto-reactive compensation controller; No. 1 circuit breaker; No. 2 circuit breakers; No. 3 circuit breakers; No. 1 the branch plerosis is run the pass jointly; be total to plerosis No. 1 and run the pass jointly; be total to plerosis No. 2 and run the pass jointly; No. 1 capacitor; No. 2 capacitors; No. 3 capacitors; described RCD upper end links to each other with the circuit breaker upper end; the circuit breaker lower end; No. 1 circuit breaker; be total to plerosis No. 1 and run the pass jointly; No. 1 capacitor links to each other; the circuit breaker lower end again with No. 2 circuit breakers; No. 2 altogether plerosis run jointly to close and link to each other with No. 2 capacitors, the circuit breaker lower end again with No. 3 circuit breakers; No. 1 branch plerosis is run jointly to close and is linked to each other with No. 3 capacitors.

3. bar following formula auto-reactive compensation device according to claim 2 is characterized in that: adopt three-phase and four-line to link to each other with the auto-reactive compensation controller on the described RCD.

4. bar following formula auto-reactive compensation device according to claim 3, it is characterized in that: described auto-reactive compensation controller inside includes control and scale unit, and described auto-reactive compensation controller front is equipped with LCD and is connected with scale unit with control.

5. bar following formula auto-reactive compensation device according to claim 1, it is characterized in that: this bar following formula auto-reactive compensation device is installed in the rural area low-voltage distribution network apart from head end 2/3 or 4/5 place.