CN203536970U - Magnetic control static var compensator - Google Patents
Magnetic control static var compensator Download PDFInfo
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- CN203536970U CN203536970U CN201320741867.3U CN201320741867U CN203536970U CN 203536970 U CN203536970 U CN 203536970U CN 201320741867 U CN201320741867 U CN 201320741867U CN 203536970 U CN203536970 U CN 203536970U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a magnetic control static var compensator, mainly solves problems that reactive compensation in the prior art has disadvantages of laddering and low precision, frequent switching operation, and that inductive and capacitive reactive power cannot be provided at the same time, and a problem that higher requirement of an electric system and users cannot be satisfied. The magnetic control static var compensator comprises a digital signal processor, a power supply whose output ends are connected with the digital signal processor, a capacitor group or a filter group, a keyboard, an LCD whose input end is connected with the digital signal processor, a programmable logic controller, a reactive compensation unit, a controllable paralleling reactor CSR, and an AD sampling circuit whose input end is connected with the controllable paralleling reactor CSR and output end is connected with the digital signal processor. Through the above scheme, the device achieves objective of relatively high cost performance and conforming actual demands, and has very high practical value and popularization value.
Description
Technical field
The utility model relates to a kind of compensation arrangement, specifically, relates to a kind of magnetic control static passive compensation device.
Background technology
Interconnected and remote, the large capacity transmission of electric power system become the important trend of electric power industry development.In trans-regional long distance set, the ac transmission passage of power transmission or AC/DC parallel passway for transmitting electricity are more and more, under major break down disturbance, the dynamic reactive tenability of electrical network not only becomes the important restrictions of interconnected network ability of supplying electric power, and can have influence on Voltage Stability Level and the Voltage security margin of networked system.How to improve the safety and stability level of electrical network, promote the ability to transmit electricity of existing electrical network, bringing into play to greatest extent transmission line is the major issue that power network development faces.
In distribution system, the impact of high-power impact load and uncompensated load is also day by day serious, has caused system voltage fluctuation, has affected the normal operation of other electric equipments and the economy of electricity consumption.Along with expanding economy, a large amount of impact loads are as arc furnace, milling train, the access such as electric railway electrical network, these are non-linear, meritorious and the reactive power of uneven impact load significantly changes in process of production randomly or periodically, its fluctuating current flows through supply line's impedance, by points of common connection, be delivered on other feeder line of electrical network, cause the serious fluctuation of voltage and flickering, caused severe contamination to the quality of power supply of distribution system, endanger other users' electric equipment, cause production efficiency to reduce, specific energy consumption increases, product quality declines.
The loss of electrical network, voltage and angle stability fast, effectively provide relevant with reactive power.And at power grid construction and in service, long-term existence reactive compensation capacity is not enough and be equipped with irrational problem, reserve capacity wretched insufficiency, particularly adjustable reactive capability is not enough, can respond fast the equipment of idle adjusting still less.Switch on-off electric capacity is the indemnifying measure generally adopting manually, and degree of regulation is inadequate, and response speed is slow, and switch on-off capacitor easily produces overvoltage problem.Transmission system lacks idle adjusting timely, and system oscillation easily expands, and has reduced the stability of transmission system.Load center lacks reactive power support fast, easily causes even voltage collapse of low voltage.Idle deficiency causes voltage-drop, power transmission loss is large, circuit transmission capacity reduces and network stabilization declines.Lack idle regulating measure and caused busbar voltage very large with the change of operational mode, cause grid line loss to increase, rate of qualified voltage is not high.
Traditional Reactive Compensation Mode is mainly fixed compensation and grouping switching.Fixed compensation is to carry out the artificial compensation arrangement moving back of throwing according to load or burden without work, in load or burden without work peak period, drop into, during load or burden without work low ebb, exit, because compensation capacity immobilizes, usually there is peak period undercompensation, during low ebb, but because crossing, mend the situation that can not drop into, compensation precision is low, weak effect, and its advantage is small investment.Grouping switching mode is divided into groups to compensation arrangement according to load or burden without work operating mode, according to load or burden without work real-time requirement, throw and move back, due to a minute reasonable set, can be optimized combination switched capacitor according to the size of load or burden without work, compensation precision is higher than fixed compensation device.The reactive power compensator grouping of grouping switching is more, and compensation precision is higher, but that grouping too much can cause investing is excessive, shoves excessive while also easily causing opening-closing capacitor bank, shortens the useful life of equipment.
Traditional employing contactor or the mode of vacuum circuit-breaker opening-closing capacitor bank, in making process, there is spring, restrike and the danger such as overvoltage, during capacitor bank lock, there is larger impulse current, after major loop separating brake, on capacitor, still there is higher direct voltage, need certain electric discharge interval time, thereby this compensation arrangement can not frequent movement, to the fluctuation of load, can not respond in time, easily produced and mend and owe to mend, can not reach and keep best compensation effect, the reactive power that impact load produces can not effective compensation, can not solve the spread of voltage that impact load brings, flicker changes, the problems such as system losses and reduction load transformer capacity, generally be only suitable in changing not quite in reactive power or occasion slowly.
Adopt contactor or vacuum circuit-breaker opening-closing capacitor bank, when each input capacitor group, owing to can not selecting the input angle of control switch contact, cause larger inrush phenomenon, during excision, produce overvoltage, thereby cause switch contact wearing and tearing, capacitor shortening in useful life, have a strong impact on the useful life of installing self, also can bring pollution to electric power system simultaneously.
Along with the increase of nonlinear-load, impact load and the expansion of electric power system scale, power consumer, electric power system have had significant raising to the requirement of reactive power compensation, the quality of power supply, as needs compensate capacitive and perceptual idle, need to regulate continuously fast compensation output, suppress voltage fluctuation and flicker etc.Traditional Reactive Compensation Mode is that reduction network loss, systems stabilisation voltage have been brought into play important function within a very long time, but because its compensation is ladder, precision is low, the shortcomings such as perception and capacitive reactive power, switch motion be frequent cannot be provided simultaneously, can not meet electric power system and user's requirements at the higher level.
Utility model content
The purpose of this utility model is to provide a kind of magnetic control static passive compensation device, mainly solve that the reactive power compensation existing in prior art is ladder, precision is low, the shortcomings such as perception and capacitive reactive power, switch motion be frequent cannot be provided simultaneously, can not meet the problem of electric power system and user's requirements at the higher level.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Magnetic control static passive compensation device, comprise digital signal processor, the power supply that output is all connected with digital signal processor, capacitor group or bank of filters, keyboard, the liquid crystal display that input is all connected with digital signal processor, programmable logic controller (PLC) and reactive power compensation unit, the controllable parallel reactors CSR being all connected with reactive power compensation unit and programmable logic controller (PLC), input and the AD sample circuit that controllable parallel reactors CSR is connected, output is connected with digital signal processor.
Further, between described reactive power compensation unit and controllable parallel reactors CSR, be also connected with current regulator and phase-shift trigger circuit for thyrictor, the input of described current regulator is connected with reactive power compensation unit, output is connected with phase-shift trigger circuit for thyrictor, and the output of described phase-shift trigger circuit for thyrictor is connected with controllable parallel reactors CSR.
Consider actual demand, on described controllable parallel reactors CSR, be integrated with external-connected port.
Specifically, described controllable parallel reactors CSR comprises the main iron core that the iron core 1 that is communicated with by end and iron core 2 form, described iron core 1 and iron core 2 are by two identical iron core members of structure and be connected in two magnet valves between iron core member and form, and the cross section of described magnet valve is less than iron core element cross-section; Between two iron core members of described iron core 1, be connected with and trigger thyristor K1; Between two iron core members of described iron core 2, be connected with and trigger thyristor K2.
Fail safe while using in order to improve, is connected with sustained diode between described iron core 1 and iron core 2.
As preferably, two iron core members of described iron core 1 are connected with magnet valve integral type; Two iron core members of described iron core 2 are connected with magnet valve integral type.
Compared with prior art, the utlity model has following beneficial effect:
(1) to take controllable parallel reactors (Controllable Shunt Reactor) CSR be core to the utility model, coordinate Shunt Capacitor Unit or bank of filters device, reactive power sampling according to digital signal processor to network system, automatically regulate the angle of flow of controlled reactor control loop thyristor, utilize alternating current-direct current composite excitation characteristic, change DC excitation current amplitude, adjust iron core magnetic saturation, realize the continuous adjusting of reactance value and output capacity, thereby realizing reactive power compensates fast, and can effectively improve power factor, reduce network loss, stop network system vibration, improve power line transmission ability, improve the voltage stabilization ability of electrical network, the Power frequency voltage rising of restriction system and switching overvoltage, systems stabilisation voltage, very applicable.
(2) the utility model output capacity continuously adjustable, reliability is high, non-maintaining, to produce harmonic wave little, can directly access high-voltage fence, quick and smooth regulating system is idle, improve rate of qualified voltage, reduce transmission losses, improve the stability of a system, after application, can greatly improve reactive power flow and the automatic control ability of voltage of electrical network, significantly improve the ability to transmit electricity of electrical network, for safety, the stable operation of electrical network provides solid guarantee, be desirable dynamic passive compensation and voltage regulating device.
(3) the utility model is applicable to power transmission network or power distribution network, can improve stability of power system, increases system damping, suppresses system oscillation while being applied to power transmission network, reduces transmission losses, maintains system busbar voltage stabilization, improves circuit transmission capacity; While being applied to power distribution network, can carry out dynamic passive compensation to quick varying duty, improve power factor, suppress voltage fluctuation and flicker, reduce load unbalanced, filtering harmonic wave, when improving the quality of power supply, obtain energy-saving and cost-reducing economic benefit, the scope of application is wider, realistic demand.
Accompanying drawing explanation
Fig. 1 is system block diagram of the present utility model.
Fig. 2 is the principle schematic of controllable parallel reactors CSR in the utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and execution mode of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, the utility model discloses a kind of magnetic control static passive compensation device, comprise digital signal processor, power supply, capacitor group or bank of filters, keyboard, liquid crystal display, programmable logic controller (PLC), reactive power compensation unit, controllable parallel reactors CSR, AD sample circuit, current regulator and phase-shift trigger circuit for thyrictor, wherein, power supply, capacitor group or bank of filters, keyboard, liquid crystal display, programmable logic controller (PLC), reactive power compensation unit is all connected with digital signal processor with AD sample circuit, reactive power compensation unit, current regulator, phase-shift trigger circuit for thyrictor, controllable parallel reactors CSR and AD sample circuit are connected successively, and be integrated with external-connected port on controllable parallel reactors CSR.
Core parts of the present utility model are for adopting the controllable parallel reactors CSR of thyristor control, this controllable parallel reactors CSR is based on magnet valve technology, utilize alternating current-direct current composite excitation characteristic, by regulating the angle of flow of controlled reactor control loop thyristor, change the amplitude of DC excitation electric current, thereby adjust iron core magnetic saturation, change equivalent permeability, change winding inductance and reactance, the continuously smooth of realizing output capacity regulates.And there is fast response time, capacity regulating wide ranges, can realize the continuously adjustable advantage of full capacity, itself and the combination of capacitor group can provide positive and negative continuously adjustable reactive power, thus the voltage of accuracy-control system and reactive power, and it is constant that power factor can keep, empirical tests, control precision can stably be controlled at 0.95～1, reaches better rate of qualified voltage and minimum network loss, really realizes flexible transmission.
As shown in Figure 2, during controllable parallel reactors CSR winding two ends accesses network system, in the positive-negative half-cycle of voltage, trigger respectively thyristor K1, K2 conducting, form the effect of full-wave rectification, diode D completes the effect of afterflow.By controlling the angle of flow of K1, K2, DC excitation electric current be can control, thereby the magnetic saturation degree of reactor small bore iron leg core, the inductance value of smooth adjustment controllable parallel reactors changed.The less part in controllable parallel reactors cross section is called " magnet valve ", the introducing of " magnet valve " makes ceiling excitation become possibility, magnet valve part can regulate continuously in limit saturation region, the induction reactance of reactor is changed on a large scale continuously, other parts iron core is in undersaturated condition, a kind of like this core structure and operation principle just, make controllable parallel reactors there is lower noise than common saturable reactor, less harmonic wave, lower loss, response speed faster, more linear regulating characteristics.
By the ingenious setting to structure, the thyristor of the control loop of controllable parallel reactors only need bear the low pressure of 1% left and right that is about system rated voltage, thereby operational reliability greatly improves; Adopt self coupling excitation mode, alternating current-direct current component shares a winding, has saved winding cost; Adopt magnetic valve type structural design and limit magnetic saturation working method, only have small bore section core sataration during operation, most of iron core is unsaturated, increased iron core permeability, reduced cost and volume, reduced active loss and harmonic content (half left and right that is about TCR), noise is also smaller.
Although the controllable parallel reactors in the utility model and traditional saturation type reactor all come from magnetically saturated principle, because design concept is different, frame mode is different, and the service behaviour of the two has marked difference.In the course of the work, iron core is for a long time in magnetic saturation state for traditional saturation type reactor, and loss is very large, and the inertia of current of controlling winding is large, and the response time is long, is difficult to meet the control requirement of modern voltage power-less.Controllable parallel reactors in the utility model is taked the control theory of innovation in design, adopt self coupling DC excitation and the magnetically saturated working method of the multistage limit, overcome the drawback of traditional saturation type reactor, active loss is low, fast response time, harmonic wave greatly reduces, itself and TSC, the difference of TCR is to adopt low-voltage direct to control, evaded the risk that thyristor high-voltage is controlled, and magnetic valve type structural design has expanded electric current adjusting range, harmonic wave and loss have effectively been reduced, in addition with low cost, safe and reliable, to be better than TSC, the reactive-load compensation equipment of TCR.
This magnetic control static passive compensation device mainly comprises reactor body and excitation system by capacitor group/bank of filters, controllable parallel reactors CSR() and control protection system (comprising that digital signal processor, AD adopt electric weight, reactive power compensation unit, programmable logic controller (PLC) etc.) and form.Capacitor group/bank of filters is for providing system required capacitive reactive power; controllable parallel reactors is for the corresponding lagging reactive power of the balance sysmte fluctuation of load; and steady load impacts the voltage fluctuation produce, control detection, calculating, the control that protection system completes auto-compensation and carry out and protection.
As preferably, controllable parallel reactors adopts high-quality silicon steel sheet and enamelled wire, low-temperature-rise design, there is high reliability, reach designed life more than 30 years, safeguard that simply the adjusting of controllable parallel reactors realizes in the excitation unit of main coil by self coupling, the control signal of excitation unit is from control system, between control system and excitation unit, adopts the optical fiber that isolation performance is good, antijamming capability is strong to be connected.Excitation system adopts high-quality low voltage component, connection in series-parallel that need not any device, and all element heights mature and reliable, excitation system configures standby protection system, fully guarantees system security of operation.
Capacitor group/bank of filters is for reactive power compensation and filtering harmonic wave, provide system required capacitive reactive power, filtering capacitor group can adopt fixedly access way, also can take classification switching, filtering capacitor component is become to several unit groups, by mechanical switch or thyristor valve group, according to actual electrical network demand, carry out switching operation.In concrete application, capacitor group/bank of filters configures according to on-the-spot system condition: at the less power system transformer substation of harmonic content, configurable capacitor group, installs series reactor as required additional, restriction inrush phenomenon, inhibition harmonic wave; At the heavier enterprise substation of harmonic content, can suitable bank of filters be set according to user's request.
Capacitor group/bank of filters also can be utilized the existing compensation equipment of user, as original compensation equipment capacity suitable, can only set up controllable parallel reactors, with minimum investment, obtains best effect.
Controlling protection system adopts power, current double-ring multiplex control system to regulate; can in half power frequency period, complete the idle variation of load detects; implement dynamically to follow the tracks of compensation, both can make the compensator variation of follow load electric current rapidly, also can make the power factor of load maintain set-point.Control system provides comprehensively operating condition monitoring intuitively, record demonstration promptly and accurately, and for special situation or fault, and alarm or tripping operation.Control system provides friendly man-machine interface, is convenient to user's operation and maintenance, accessible existing automation control system.Can install the protected location needing additional according to field condition.
According to above-described embodiment, just can realize well the utility model.
Claims (7)
1. magnetic control static passive compensation device, it is characterized in that, comprise digital signal processor, the power supply that output is all connected with digital signal processor, capacitor group or bank of filters, keyboard, the liquid crystal display that input is all connected with digital signal processor, programmable logic controller (PLC) and reactive power compensation unit, the controllable parallel reactors CSR being all connected with reactive power compensation unit and programmable logic controller (PLC), input and the AD sample circuit that controllable parallel reactors CSR is connected, output is connected with digital signal processor.
2. magnetic control static passive compensation device according to claim 1, it is characterized in that, between described reactive power compensation unit and controllable parallel reactors CSR, be also connected with current regulator and phase-shift trigger circuit for thyrictor, the input of described current regulator is connected with reactive power compensation unit, output is connected with phase-shift trigger circuit for thyrictor, and the output of described phase-shift trigger circuit for thyrictor is connected with controllable parallel reactors CSR.
3. magnetic control static passive compensation device according to claim 2, is characterized in that, on described controllable parallel reactors CSR, is integrated with external-connected port.
4. magnetic control static passive compensation device according to claim 3, it is characterized in that, described controllable parallel reactors CSR comprises the main iron core that the iron core 1 that is communicated with by end and iron core 2 form, described iron core 1 and iron core 2 are by two identical iron core members of structure and be connected in two magnet valves between iron core member and form, and the cross section of described magnet valve is less than iron core element cross-section.
5. magnetic control static passive compensation device according to claim 4, is characterized in that, is connected with and triggers thyristor K1 between two iron core members of described iron core 1; Between two iron core members of described iron core 2, be connected with and trigger thyristor K2.
6. magnetic control static passive compensation device according to claim 5, is characterized in that, between described iron core 1 and iron core 2, is connected with sustained diode.
7. magnetic control static passive compensation device according to claim 6, is characterized in that, two iron core members of described iron core 1 are connected with magnet valve integral type; Two iron core members of described iron core 2 are connected with magnet valve integral type.
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| CN201320741867.3U CN203536970U (en) | 2013-11-22 | 2013-11-22 | Magnetic control static var compensator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580039A (en) * | 2013-11-22 | 2014-02-12 | 成都星宇节能技术股份有限公司 | Magnetically-controlled static var compensator |
| CN107147128A (en) * | 2017-04-13 | 2017-09-08 | 贵州电网有限责任公司电力科学研究院 | A kind of load power optimization method based on load P U characteristics |
-
2013
- 2013-11-22 CN CN201320741867.3U patent/CN203536970U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580039A (en) * | 2013-11-22 | 2014-02-12 | 成都星宇节能技术股份有限公司 | Magnetically-controlled static var compensator |
| CN107147128A (en) * | 2017-04-13 | 2017-09-08 | 贵州电网有限责任公司电力科学研究院 | A kind of load power optimization method based on load P U characteristics |
| CN107147128B (en) * | 2017-04-13 | 2019-11-26 | 贵州电网有限责任公司电力科学研究院 | A kind of load power optimization method based on load P-U characteristic |
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Owner name: CHENGDU XINGYU ENERGY-SAVING TECHNOLOGY STOCK CO., Effective date: 20140326 Owner name: STATE GRID SICHUAN ENERGY SAVING SERVICE CO., LTD. Free format text: FORMER OWNER: CHENGDU XINGYU ENERGY-SAVING TECHNOLOGY STOCK CO., LTD. Effective date: 20140326 |
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Inventor after: He Desheng Inventor after: Xiao Song Inventor after: Ye Jianfeng Inventor after: Wang Bo Inventor after: Ma Chao Inventor after: Li Min Inventor after: Chen Caijian Inventor after: Chai Ruoyu Inventor after: Luo Haiwei Inventor before: Li Min Inventor before: Chen Caijian Inventor before: Chai Ruoyu Inventor before: Luo Haiwei |
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Free format text: CORRECT: INVENTOR; FROM: LI MIN CHEN CAIJIAN CHAI RUOYU LUO HAIWEI TO: HE DESHENG XIAO SONG YE JIANFENG WANG BO MA CHAO LI MIN CHEN CAIJIAN CHAI RUOYU LUO HAIWEI |
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Effective date of registration: 20140326 Address after: 610000, No. two, Dongfeng Road, Chengdu, Sichuan, Jinjiang District 21 Patentee after: STATE GRID SICHUAN ENERGY SAVING SERVICE CO., LTD. Patentee after: Chengdu Xingyu Energy-Saving Technology Stock Co., Ltd. Address before: 610000 Chengdu International Trade Center, No. 2, No., pioneering Road, hi tech Zone, Sichuan, China Patentee before: Chengdu Xingyu Energy-Saving Technology Stock Co., Ltd. |
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