CN203406617U - Dynamic reactive power compensation apparatus capable of compensating each phase respectively - Google Patents
Dynamic reactive power compensation apparatus capable of compensating each phase respectively Download PDFInfo
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- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
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Abstract
The utility model relates to a dynamic reactive power compensation apparatus capable of compensating each phase respectively. The apparatus comprises reactors and capacitors connected in three phases of circuits (A, B and C). The apparatus is characterized in that a high voltage line is respectively connected to one end of each of inductance coils (L1, L2 and L3) of reactors after the high voltage line passes the three phases of circuits (A, B and C) behind a transformer and composite switches (K1, K2 and K3), and contactors; and the other end of each of the inductance coils (L1, L2 and L3) is connected to a capacitor terminal, and Y connection is adopted by the capacitors, a terminal T1 is connected to one pole of a capacitor C1, a terminal T2 is connected to one pole of a capacitor C2, and a terminal T3 is connected to one pole of a capacitor C3. The other poles of the C1, C2 and C3 are connected together to be connected to a null line N of a power supply after passing a reactor X. The dynamic reactive power compensation apparatus capable of compensating each phase respectively can be used for dynamic reactive compensation of an electric power system, can control and achieve minimum of an injected electrical network harmonic wave, and has more ideal overall performance compared with a conventional reactive power compensation apparatus.
Description
Technical field
The utility model relates to the device producing for eliminating the nonlinear-load of power equipment, the dynamic reactive power compensation equipment of particularly mending for single-phase minute.
Background technology
Development along with power industry, (the frequency conversion allocation and transportation device of nonlinear-load in electric power system, soft-starting device for motor, magnetic saturation stable-pressure device, large-scale rectifying device, communication apparatus, Medical Devices, electric welding unit, large supermarket's lamp lighting etc.) increasingly increase, these equipment are when operation, platform causes voltage waveform to change, produce high order harmonic component, the power factor of electrical network is reduced, increase ripple coefficient f electrical network is caused to very large harm, especially in reactive power compensation circuit, capacitor can amplify high order harmonic component, the moment generation that makes to close a floodgate is shoved, circuit seriously transships, capacitor is breakdown, cause short circuit to jeopardize equipment operation personal safety, even lead to blast and cause fire.
Reactive power compensation: work to improve the power factor of electrical network in electronic power system, reduce the loss of supply transformer and conveying circuit, improve power supplying efficiency, improve power supply environment.So reactive power compensation device is in an indispensable very important position in power supply system.Reasonably select compensation arrangement, can accomplish to reduce to greatest extent the loss of network, power grid quality is improved.Otherwise, as selected or improper use, may cause electric power system, voltage fluctuation, the factors such as harmonic wave increase.Reactive power compensation can be received following benefit: 1. improve user's power factor, thereby improve the utilance of electrical equipment; 2. reduce the active loss of electric power networks; 3. the reactive power of reasonably controlling electric power system flows, thereby improves the voltage levvl of electric power system, improves the quality of power supply, has improved the antijamming capability of electric power system; 4. on dynamic reactive power compensator, configure suitable adjuster, can improve the dynamic property of electric power system, improve conveying capacity and the stability of power transmission line; 5. install Static Var Compensator (SVS) and can also improve the voltage waveform of electrical network, harmonic reduction component and solution negative-sequence current problem.To capacitor, cable, motor, transformer etc., additional electrical energy loss and the local overheating that can also avoid high order harmonic component to cause.
The reactive power compensation device of report has at present, and through retrieval, we find following open source literature:
1, Chinese patent, title: dynamic real-time low-voltage reactive power compensation device application (patent) number: CN201010236392.3 open (bulletin) number: CN102340143A applies for (patent right) people: Yu Cheng Electrical Appliances Co., Ltd address: No. 4, Shao Zhen road, Zhen Wu town, Jiangdu City, Jiangsu Province invention (design) people: Hang Ping; Bai Suhong; Liu Chunhui summary: dynamic real-time low-voltage reactive power compensation device.Control algorithm device is connected with electrical network by sensing device, and control algorithm device is connected with switching actuator by holding wire, and switching actuator is composed in parallel by controllable silicon and contactor, and switching actuator is connected with building-out capacitor by control line.Because control algorithm device is sampled immediately to the situation of electrical network, and the data after processing are sent into switching actuator, and due to silicon controlled fast conducting characteristic in switching actuator, realized voltage zero-cross input, the dynamic compensation of current over-zero excision, and its response time can be less than 10 milliseconds, can suppress the harmonic wave of 3 to 11 times.
2, Chinese patent, title: dynamic reactive power compensation equipment application (patent) number: the CN201110280399.X applying date: 2011.09.21 open (bulletin) number: CN102340144A applies for (patent right) people: Hanfeng Science & Technology Development Co., Ltd., Suzhou address: the North west side, main road, East, economic development zone, Zhangjagang City, Jiangsu Province invention (design) people: Zhao Jianfeng, Ni Xijun, Ji Zhendong, Ye Chao, Wang Jiankun summary: a kind of dynamic reactive power compensation equipment, it comprises computer system, plural groups single-phase the control of reactive power compensating unit and man-machine control interface, wherein, computer system is connected with each single-phase the control of reactive power compensating unit respectively by bus communication unit, and each single-phase the control of reactive power compensating unit comprises power factor controller, touch-screen and plural rack unit, each rack unit comprises comprehensive electric energy transmitter, electric current and voltage transmitter, overvoltage protection device, feed isolating switch, control device group, electric capacity, outlet isolating switch, comprehensive electric energy transmitter, electric current and voltage transmitter is arranged on circuit, overvoltage protection device parallel connection on the line, feed isolating switch, fast acting fuse, control device group, electric capacity, the series connection of outlet isolating switch, then parallel connection on the line.The present invention can effective compensation reactive power, improves power factor, reduces flickering, eliminates and shove, suppress three-phase imbalance, maintain transmission system stability, energy savings.
3, Chinese patent, title: reactive power compensation device application (patent) number: the CN201220213061.2 applying date: 2012.05.14 open (bulletin) number: CN202524098U applies for (patent right) people: location, slow monarch level land: Jing Guang Center, Hu Jia building, Chaoyang District, Beijing City Business Building 9 floor Degremont S.A summaries: the utility model belongs to electric and electronic technical field, be specifically related to a kind of reactive power compensation device, comprise rectifier bridge, capacitor, three reactors, described rectifier bridge is connected with power supply, described capacitor is connected with rectifier bridge, described three reactors access in parallel electric power system, between described electric capacity and described three reactors, also be parallel with six igbts, described each igbt is in parallel with a diode reverse, wherein, described diode is high backward resistance point-contact diode.By controlling the break-make of described six igbts, can change the direct voltage on described capacitor into synchronize with power system voltage three-phase alternating voltage.The technical scheme that the utility model provides has favorable expandability, can realize dynamic, continuous, synchroballistic, does not produce harmonic wave, and corresponding speed is fast, improves power factor, reduces the advantages such as line loss.
4, Chinese patent, title: Intelligent dynamic reactive power compensating application number: the CN200520003874.9 applying date: 2005.01.21 open (bulletin) number: CN2775908 applies for (patent right) people: Pengxin Electric Science and Technology Co., Ltd., Guangdong address: the Guan Shan of Xingning City, Guangdong Province mono-red entrance to a lane, tunnel, invention (design) people: Liu Weixiong, Wen Yonghong, He Gengxin, Zeng Huiyun, Luo Songhua summary: a kind of Intelligent dynamic reactive power compensating, it comprises circuit breaker, fuse group, switching adjuster, capacitor group, lightning arrester and intelligent central processing system, device is comprised of major loop and secondary circuit, major loop is by circuit breaker, fuse group, switching adjuster, capacitor group and lightning arrester form, secondary circuit (being control loop) comprises intelligent central processing system, control terminal in switching adjuster, the advantage of this product be realize when the electric online operation with transformer under-voltage, overvoltage protection, according to power consumption, changing automatically to start regulates reactive power to compensate fast, there is strong anti-interference ability, Real-time Collection, record, store operational factor, by RS232 interface, be connected with computer/mobile phone realize distribution network automated energy-conservation.
The reactive power compensation device of above-mentioned open source literature report also has the following disadvantages: the complex structure having, and cost is higher; What have is responsive to system parameters, harmonic voltage easily occurs and amplify the even phenomenon of resonance; What have must use with large capacity filter simultaneously, and output reactive current reduces and linear reduction with busbar voltage, does not possess overload capacity; Effect is not fine, does not have basic inhibition and filter action.
Summary of the invention
The purpose of this utility model is to provide a kind of dynamic reactive power compensation equipment of three-phase total compensation, for the dynamic passive compensation of electric power system.Can control realization injection mains by harmonics and minimize, than traditional reactive power compensation device, there is more preferably combination property.
The technical solution of the utility model realizes in mode below:
The dynamic reactive power compensation equipment of mending for single-phase minute, comprise and be connected on A, B, reactor on C three-phase circuit and capacitor, it is characterized in that: high-tension line is through transformer and combination switch K1, K2, A after K3, B, C three-phase circuit meets respectively the inductance coil L1 of reactor, L2, L3 one end, inductance coil L1, L2, another termination capacitor terminal of L3, described capacitor adopts Y connection, T1 terminal connects a utmost point of capacitor C1, T2 terminal connects a utmost point of capacitor C2, T3 terminal connects a utmost point of capacitor C3, C1, C2, after connecting, another utmost point of C3 meets the zero line N of power supply after reactor X.
Described reactor is provided with iron core, and iron core partly adopts annular gap structure, and high magnetic conduction nano material, forms through powder metallurgy pressing, more than permeability ui80000-100000.
The dynamic reactive power compensation equipment of mending for described single-phase minute is a group or more in parallel use, that is to say, high-tension line can connect a dynamic reactive power compensation equipment after connecing down a transformer, then connects load; Or a transformer connects several dynamic reactive power compensation equipments, then connects load.
Advantage of the present utility model:
One, reactive power compensation device of the present utility model, can dynamic compensation idle, also dynamic compensation harmonic, belongs to current state-of-the-art third generation reactive power compensation product.
It is static reacance generator of new generation, is the representative of reactive power compensation field state-of-the-art technology application.Be parallel in electrical network, be equivalent to a variable reactive current source, by regulating amplitude and the phase place of inverter AC output voltage, or directly control amplitude and the phase place of its ac-side current, absorb rapidly or send needed reactive power, realizing the idle object of quick dynamic adjustments.When adopting Direct Current Control, directly ac-side current is controlled, not only can follow the tracks of the impulse current of compensation impingement load, and can also follow the tracks of compensation to harmonic current.It can carry out continuously when system disturbance, smoothly, dynamically, reactive power compensation fast, maintain system voltage, improve the stability of a system.The utility model is applied to lack the large-scale load center that power supply supports, can strengthens the power that is subject to of load center, improve its voltage stability, prevent the generation of extensive load rejection and line voltage collapse accident.Putting into operation of this device, can effectively eliminate a large amount of losses that reactive current, harmonic current produce in circuit and transformer simultaneously, reduces energy consumption, power cost saving expenditure.
This device improves the quality of power supply by product features such as power ratio control factor, voltage-regulation, negative-sequence current or voltage compensation, inhibition flickering, dynamic resonance dampings, promotes reliability, strengthens the stabilization of power grids and improves ability to transmit electricity.
Two, contrast with the functional characteristics of other reactive power compensators: the utility model be take high power three-phase voltage source inverter as core, its output voltage is by connecting reactance connecting system, keep with frequency, homophase with system side voltage, by regulating the relation of its output voltage amplitude and system voltage amplitude, determine the character of power output, when its amplitude is greater than system side voltage magnitude, export capacitive reactive power, while being less than, output perception is idle.
When for power transmission network, can improve stability of power system, increase system damping, suppress system oscillation, thereby increase substantially voltage transmission ability.
When for power distribution network, can carry out dynamic passive compensation fast and effectively for fluctuating load, voltage fluctuation and flicker, load unbalanced, power factor and harmonic wave are compensated, effectively improving the quality of power supply simultaneously, can obtain significantly energy-saving and cost-reducing benefit, for example, when SVG compensates for arc furnace, furnace of calcium carbide even load, average power consumption often can reduce 4%-15%, economic benefit highly significant.
(1) can provide from perception to capacitive continuously, smoothly, dynamically, reactive power compensation fast;
(2) based on IGBT inverter, be controllable current source type compensation arrangement, can there is not harmonic wave and amplify and resonance, insensitive to system parameters, fail safe and good stability; Existing reactive power compensation device is responsive to system parameters, harmonic voltage easily occurs and amplify the even phenomenon of resonance;
(3) not only do not produce harmonic wave, and possess harmonic compensation function simultaneously, in dynamic passive compensation, can carry out filtering to 13 following harmonic waves.And TCR produces a large amount of harmonic waves at compensating power in existing reactive power compensation device simultaneously, cause TCR to use with large capacity filter simultaneously;
(4) about 40-60ms of response time, during for power distribution network, flicker control effect is than the good 2-3 of prior art doubly; During for power transmission network, the effect that improves the stability of a system is more excellent;
(5) existing reactive power compensator impedance type characteristic, output reactive current reduces and linear reduction with busbar voltage; The utility model is current source characteristic, and output reactive current is not affected by busbar voltage.Current source characteristic of the present utility model also makes it possess stronger short period overload capability, can be used to further improve stability of power system, and existing reactive power compensation device does not possess overload capacity;
(6) the utility model is current source characteristic, output reactive current is not affected by busbar voltage, current source characteristic also makes it possess stronger short period overload capability, can be used to further improve stability of power system, and existing reactive power compensation device is impedance type characteristic, output reactive current reduces and linear reduction with busbar voltage, does not possess overload capacity;
(7) the utility model adopts the chain structure of H bridge series connection, directly accesses 6kV, 10kV, 35kV system, cost.And possess N+1 redundancy structure, and a link units still can continue oepration at full load after damaging mutually, and device self-operating reliability is high.
(8) modularization, redundant design, reliability is high, easy to maintenance, and the utility model unit can exchange, and modular the utility model can overhaul separately, each other without impact.
(9) adopt advanced thermal heat dissipation technology, improve reliability of Power Modules, optical fiber Driving technique improves system rejection to disturbance ability.
(10) the utility model floor space is little, is 1/3 to 1/2 of the existing reactive power compensation device of same capacity tradition, mobility, favorable expandability.
(11) the utility model can provide active power within the specific limits, reduces active power and impacts; Existing reactive power compensation device can only provide reactive power;
(12) in the utility model, inductance has adopted and the diverse technology of existing reactive power compensation device and manufacture craft, iron core is with the ring body of magnetic conduction powder direct pressing moulding, on ring body, establish profile groove to produce air gap, properties of product are reliable and stable, can be unsaturated, magnetic circuit is evenly distributed, and greatly reduces unloaded exciting curent and no-load loss, and in running, electromagnetic noise significantly reduces; Also have that energy efficient, volume are little, the feature such as good heat dissipation, temperature rise are low, lightweight, easy for installation, and adopt guard shield structure, line terminal, earth terminal all outside, are conducive to terminal block.
(13) the utility model adopts the low device of switching loss, and overall active loss is low, makes running wastage of the present utility model less 2 to 3 times than the existing reactive power compensation device of same capacity, and operating cost is low; Power savings is remarkable.
Three, the utility model dynamic reactive compensation device and active harmonic control apparatus system characteristic:
1, possesses anti-humorous wave energy, more safeguards system safety.Be controllable current source, only compensate fundamental reactive current, system harmonics electric current can not cause compensation equipment to damage, and makes its life, maintenance workload few.Avoid the harmonic wave that the anti-capacitor group of crosstalk may cause to amplify, other equipment of anti-locking system and compensation equipment damage because of harmonic wave overvoltage simultaneously;
2, dynamically continuously smooth compensation, response speed more at a high speed makes the compensation effect of voltage flicker better.Can follow load variations, dynamically Continuous Compensation power factor, can send out idle, also can absorb idlely, has thoroughly stopped idle situation about sending;
3, can solve the imbalance problem of load;
4, not only do not produce harmonic wave, and can be in compensating power dynamic compensation harmonic wave;
5. current source characteristic, exports reactive current and not affected by busbar voltage, and traditional existing reactive power compensation device contains impedance type characteristic, and output current reduces with busbar voltage is linear.
Four, the high-power dynamic reactive compensation device of the utility model and active harmonic control device, be widely used in 380V, 690V, 1140V, 3kV, 6kV, 10kV, 35kV, 66kV grade power supply-distribution system and big-and-middle-sized enterprise substation.These application as: electric power, iron and steel, colliery, railway, oil, machinery, smelting, chemical industry, shipbuilding, harbour, light industry, building materials, mine etc., the large and occasion frequently that fluctuates of load or burden without work.
Five, the value of the utility model dynamic reactive compensation device and active harmonic control device:
The industrial large consumer of highly energy-consuming has accounted for larger specific gravity in the total power load of China, as metallurgy, mine, oil, chemical industry etc., large user generally has the network system of oneself, and electric company can make strict assessment to these large users' power factor and the quality of power supply, SVG
Provide load required reactive power nearby, avoid load and power supply to carry out reactive power exchange, can carry out Comprehensive Reactive Power Compensation to large user's internal electric network, reach the requirement of electric company to its power factor and the quality of power supply.This just means, dynamic reactive compensation device and active harmonic control device:
(1) reduced the energy loss causing in round-trip transmission process due to reactive power in circuit;
(2) reduced the loss of voltage causing in round-trip transmission process due to reactive power in circuit;
(3) reduce the loss of production or power consumption equipment, improved the stability of system.
(4) increase the transmittability of electrical network, improve utilization rate of equipment and installations, the quality of production and production efficiency, reduce production costs
(5) when minimizing electric cost expenditure, increase equipment are exerted oneself, enterprise self obtains energy-saving and cost-reducing enormous benefits.
Accompanying drawing explanation
Fig. 1 is the single-phase minute dynamic reactive power compensation equipment circuit diagram of mending.
Fig. 2 is the core of reactor schematic diagram with annular gap structure.
In Fig. 1: K1, K2, K3 combination switch, A, B, C-three-phase circuit node, R-earth resistance, X-harmonic shutter or harmonic-eliminating filtering device, L1, L2, L3-CJ contact, T1, T2, T3-reactor, CN, C1, C2, C3 electric capacity.
In Fig. 2,1-reactor annular core, 2-gap.
Embodiment
As shown in Figure 1, comprise and be connected on A, B, reactor on C three-phase circuit and capacitor, it is characterized in that: high-tension line is through transformer and combination switch K1, K2, A after K3, B, C three-phase circuit is through contactor, meet respectively the inductance coil L1 of reactor, L2, L3 one end, inductance coil L1, L2, another termination capacitor terminal of L3, described capacitor adopts Y connection, T1 terminal connects a utmost point of capacitor C1, T2 terminal connects a utmost point of capacitor C2, T3 terminal connects a utmost point of capacitor C3, C1, C2, after connecting, another utmost point of C3 meets the zero line N of power supply after reactor X.R can be earth resistance, or lightning protection device.
Described inductor core partly adopts annular gap structure, sees Fig. 2, and high magnetic conduction nano material, forms through powder metallurgy pressing, more than permeability ui80000-100000.
Claims (3)
1. a dynamic reactive power compensation equipment of mending for single-phase minute, comprise and be connected on A, B, reactor on C three-phase circuit and capacitor, it is characterized in that: high-tension line is through transformer and combination switch K1, K2, A after K3, B, C three-phase circuit meets respectively the inductance coil L1 of reactor, L2, L3 one end, inductance coil L1, L2, another termination capacitor terminal of L3, described capacitor adopts Y connection, T1 terminal connects a utmost point of capacitor C1, T2 terminal connects a utmost point of capacitor C2, T3 terminal connects a utmost point of capacitor C3, C1, C2, after connecting, another utmost point of C3 meets the zero line N of power supply after reactor X.
2. the dynamic reactive power compensation equipment of mending for single-phase minute according to claim 1, it is characterized in that: described reactor is provided with iron core, iron core partly adopts annular gap structure, high magnetic conduction nano material, through powder metallurgy pressing, form permeability ui80000-100000.
3. the dynamic reactive power compensation equipment of mending for single-phase minute according to claim 1, is characterized in that: described device is used for a group or more is in parallel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229014A (en) * | 2016-07-27 | 2016-12-14 | 中国科学院等离子体物理研究所 | A kind of integrated control method of modern high power fusion power-supply system |
| CN108092276A (en) * | 2015-07-31 | 2018-05-29 | 庄建平 | A kind of low-voltage circuit voltage and reactive power compensation control device |
-
2013
- 2013-06-17 CN CN201320344245.7U patent/CN203406617U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092276A (en) * | 2015-07-31 | 2018-05-29 | 庄建平 | A kind of low-voltage circuit voltage and reactive power compensation control device |
| CN108092276B (en) * | 2015-07-31 | 2021-02-05 | 钱才英 | Low-voltage line voltage reactive compensation control device |
| CN106229014A (en) * | 2016-07-27 | 2016-12-14 | 中国科学院等离子体物理研究所 | A kind of integrated control method of modern high power fusion power-supply system |
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