CN202103431U - MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) - Google Patents
MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) Download PDFInfo
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- CN202103431U CN202103431U CN2011202054239U CN201120205423U CN202103431U CN 202103431 U CN202103431 U CN 202103431U CN 2011202054239 U CN2011202054239 U CN 2011202054239U CN 201120205423 U CN201120205423 U CN 201120205423U CN 202103431 U CN202103431 U CN 202103431U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/14—Protecting elements, switches, relays or circuit breakers
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Abstract
The utility model relates to an MCR (Magnetically Controlled Reactor)-type static var compensator (SVC), which is characterized in that a power supply system bus supplies power to a compensation bus through a compensation wire-outgoing switch, and is provided with an FC branch and an MCR branch, the FC branch comprises a capacitor and a fixed reactor, and the MCR branch comprises a magnetic valve type controllable reactor MCR. The utility model is characterized by comprising an FC branch protection system, an MCR branch control protection system, a control power supply system, a first voltage transformer, a second voltage transformer, a first current transformer, a second current transformer, a third current transformer and a fourth current transformer. The utility model has the advantages that the voltage stabilizing capability and the power factor of a power grid can be improved, the consumption of the grid can be reduced, according to the change in load, quick and smooth adjustment is carried out to enable the system reactive power to be quickly balanced, and the quick response capability of the compensator can be improved. The utility model has a simple structure, a small size and low manufacture and maintenance cost, is stable to operate, and is easy to maintain.
Description
Technical field
The utility model relates to a kind of electric network reactive-load adjusting device, specifically a kind of MCR type SVC static dynamic no-power compensation device based on magnetic valve type controllable reactor.
Background technology
In recent years, along with rapid economic development, electric equipment electricity capacities such as powerful milling train, arc furnace, electric welding machine are at double even tens of times growth in many modern industries.These main equipments all are impact loads, and their use not only power consumption is big, also can cause very big reactive power impact to electrical network, form voltage flicker and produce harmonic pollution.The generation of these problems has not only influenced the normal operation of equipment self, and they can also be propagated in electrical network, and then disturbs the normal use even the damage of other equipment.Even more serious is, the generation of harmonic wave can cause the electric equipment protection misoperation, metering is inaccurate, control system is malfunctioning and consequence such as communication system interference, forms the major safety risks of electric power system.
Along with the quick growth of China's electricity supply and demand amount, the requirement that improves the quality of power supply, reduction power transmission and transformation loss is also urgent day by day.Utilize condenser reactance device switching to realize that idle in-situ balancing is the main means that improve the quality of power supply, reduce line loss; Especially 110kV, 35kV transformer station are as the terminal transformer station in the network system; Bearing directly the task that the high-quality electric energy that voltage stablizes reactive balance is provided to user load, it is even more important that reactive power compensator seems.The imaginary power automatic compensation of present most of 110kV, 35kV transformer station is all not ideal enough; This have the compensation equipment of grade electric capacity to realize follow load change dynamics compensation power; But it is most fast owing to not adapting to load variations; So do not reach the most desirable compensation effect, the 10kV of the transformer station bus power factor that has during the load peak is low to below 0.96.
Existing two kinds of technical schemes: transform existing 10kV auto-reactive compensation device and thyristor-controlled reactor type (TCR) static dynamic no-power compensation device.Be exactly first kind of scheme realizes how many idle automatic tracking and compensatings drops into capacitor according to payload, change the opening-closing capacitor bank number Zong be divided into many groups to the capacitor of compensation capacity according to payload, reach reactive balance as much as possible.Compensation precision is directly proportional with capacitor group number, and the many more compensation precisions of group number that capacitor divides are high more, but equipment investment cost is big more, and the occupation of land space is big more, and the reliability requirement of equipment is high more.Improve the compensation precision of compensation arrangement, realize grouping tracking compensation, utilize this scheme because cost of investment is difficult to promote the use of with the occupation of land spatial constraints.Second kind of scheme thyristor valve group and air core reactor are cascaded, and during the not conducting of thyristor valve group, do not have electric current to flow through reactor; Reactor is consume reactive power not; Thyristor conducting angle is more little, and the electric current that flows through reactor is big more, and the reactive power that reactor absorbs is many more; Thyristor conducting angle is big more, and the electric current that flows through reactor is more little, and the reactive power that reactor absorbs is more little, through the angle of flow of control thyristor, regulates to realize dynamic reactive power.Though TCR has the continuously adjustable characteristics of compensation rate, its shortcoming also is conspicuous, complex structure, and manufacturing cost is big, and loss is big, and operation maintenance is relative complex also.
The utility model content
To above-mentioned deficiency, the utility model provides a kind of MCR type SVC static dynamic no-power compensation device, its not only each item stable performance, and also manufacturing and maintenance cost are low.
The technical scheme that its technical problem of the utility model solution is taked is: MCR type SVC static dynamic no-power compensation device; Its mainly by the electric power system bus through compensate out wiretap to the compensation bussed supply; And be provided with FC branch road and MCR branch road; Said FC branch road comprises capacitor and constant reactance device; Said MCR branch road comprises magnetic valve type controllable reactor MCR, it is characterized in that, also comprises FC branch protection system, MCR branch road control protection system, control power-supply system, first voltage transformer, second voltage transformer, first current transformer, second current transformer, the 3rd current transformer and the 4th current transformer;
Described FC branch road and MCR branch road are connected with the compensation bus through isolating switch separately; Said first current transformer is arranged between electric power system bus and the compensation bus; Said second current transformer is arranged between FC branch road and the compensation bus; Said the 3rd current transformer is arranged between MCR branch road and the compensation bus; Said the 4th current transformer is arranged between load and the electric power system bus; Said first voltage transformer is connected with the electric power system bus, and said second voltage transformer is connected with the compensation bus;
Said FC branch protection system comprises data acquisition unit, processor CPU and protection output unit, and the data acquisition unit of said FC branch protection system links to each other with first current transformer, second current transformer and FC branch road respectively;
Said MCR branch road control protection system comprises control protection module, monitoring module and excitation module, and said control protection module comprises processor CPU and the communication unit that is connected with processor CPU respectively, data input cell DI, data output unit DO, data sampling unit and optic electric interface circuit; Said monitoring module comprises upper monitoring machine and the display unit and the printer that are connected with the upper monitoring machine respectively, and said upper monitoring machine is connected with the communication unit of monitoring and protection module; Said excitation module comprises optic electric interface circuit, impulse circuit, driving amplifying circuit and the controllable silicon of series connection successively; Described excitation module is connected through the optic electric interface circuit with the monitoring and protection module; The data sampling unit of the control protection module of said MCR branch road control protection system is connected with the 3rd current transformer, the 4th current transformer and first mutual induction of voltage respectively; The impulse circuit of the excitation module of said MCR branch road control protection system is connected with the 3rd current transformer with second voltage transformer respectively.
Its operation principle is: FC props up the road direction electric power system fixedly capacitive reactive power is provided, and the MCR branch road tends to balance system's perception and capacitive reactive power then by electric power system load variations absorbing redundant capacitive reactive power.FC branch road and MCR branch road can be shared a cover outlet cabinet, the isolating switch maintenance of each branch road setting or when stopping using with system's isolation.First voltage transformer is the system busbar voltage transformer, is used for the detection system bus voltage value; Second voltage transformer is the compensation bus-bar potential transformer, is used for detecting the compensation bus voltage signal, supplies the MCR branch road to make the trigger impulse synchronizing signal and uses.Each branch road all is equipped with the current transformer that overcurrent protection detects usefulness.When the protection fault appearred in the FC branch road, FC branch protection system at first sent the separating brake instruction through protection output to compensating out wiretap, and then uploads protection, warning message through communication interface to monitor portion; When MCR branch road control protection system detects MCR branch road or load circuit electric current and surpasses one section or two sections overcurrent definite values; Send the separating brake instruction through the DO interface to the wiretap that goes out of each branch road, and will protect alarm signal to be uploaded to monitor portion and send warning message.
The beneficial effect of the utility model is: this MCR type SVC static dynamic no-power compensation device has improved the voltage stabilizing power and the power factor of electrical network; Reduced grid loss; Realized according to the load variations situation carry out fast, smooth adjustment makes the idle balance that reaches rapidly of system, improves the compensation arrangement capability of fast response.The utility model is not only simple in structure, volume is little, manufacturing and maintenance cost are low, and stable, be easy to safeguard.
Description of drawings
Fig. 1 is the theory diagram of the utility model;
Fig. 2 is the structured flowchart of FC branch protection shown in Figure 1 system;
Fig. 3 is the structured flowchart of MCR branch road control protection system shown in Figure 1.
Embodiment
Like Fig. 1, Fig. 2 and shown in Figure 3; This MCR type SVC static dynamic no-power compensation device; Its mainly by the electric power system bus through compensate out wiretap to the compensation bussed supply; And be provided with FC branch road and MCR branch road, and said FC branch road comprises capacitor and constant reactance device, said MCR branch road comprises magnetic valve type controllable reactor MCR; It is characterized in that, also comprise FC branch protection system, MCR branch road control protection system, control power-supply system, first voltage transformer, second voltage transformer, first current transformer, second current transformer, the 3rd current transformer and the 4th current transformer.Described FC branch road and MCR branch road are connected with the compensation bus through isolating switch separately; Said first current transformer is arranged between electric power system bus and the compensation bus; Said second current transformer is arranged between FC branch road and the compensation bus; Said the 3rd current transformer is arranged between MCR branch road and the compensation bus; Said the 4th current transformer is arranged between load and the electric power system bus; Said first voltage transformer is connected with the electric power system bus, and said second voltage transformer is connected with the compensation bus.
As shown in Figure 2, said FC branch protection system comprises data acquisition unit, processor CPU and protection output unit, and the data acquisition unit of said FC branch protection system links to each other with first current transformer, second current transformer and FC branch road respectively.It is the Microcomputer Protection unit of core with the 80C196 chip that FC branch protection system is one; Through gathering FC branch road and compensation outlet cabinet electric current and FC branch road residual voltage (also can gather capacitor protection signals such as unsymmetrical current, differential pressure), realize defencive functions such as one section of FC branch road overcurrent, two sections of overcurrents, one section of compensation outlet cabinet overcurrent, two sections of overcurrents, unbalance voltage (residual voltage), unsymmetrical current by various protection algorithms.When the protection fault occurring, the Microcomputer Protection unit at first sends the separating brake instruction through protection output to compensating out wiretap, and then uploads protection, warning message through communication interfaces such as RS232, RS485 and CAN buses to monitor portion.
As shown in Figure 3; Said MCR branch road control protection system comprises control protection module, monitoring module and excitation module, and said control protection module comprises processor CPU and the communication unit that is connected with processor CPU respectively, data input cell DI, data output unit DO, data sampling unit and optic electric interface circuit; Said monitoring module comprises upper monitoring machine and the display unit and the printer that are connected with the upper monitoring machine respectively, and said upper monitoring machine is connected with the communication unit of monitoring and protection module; Said excitation module comprises optic electric interface circuit, impulse circuit, driving amplifying circuit and the controllable silicon of series connection successively; Described excitation module is connected through the optic electric interface circuit with the monitoring and protection module; The data sampling unit of the control protection module of said MCR branch road control protection system is connected with the 3rd current transformer, the 4th current transformer and first mutual induction of voltage respectively; The impulse circuit of the excitation module of said MCR branch road control protection system is connected with the 3rd current transformer with second voltage transformer respectively.
The control protection module of MCR branch road control protection system is the many cpu controllers based on the 80C196 chip, and each part is realized data sharing through many mouthfuls of RAM each other; Control algolithm and protection logic realize by master cpu, and system parameters (voltage, electric current, meritorious, idle, power factor or the like) is gathered, calculating is realized by data acquisition unit; The communication unit of being responsible for communication specially is used for and upper monitoring machine and other supervisory control system swap datas, and communication interfaces such as RS232, RS485 and CAN bus are provided, and is convenient to realize unattended operation and Long-distance Control.System has reliability, the stability of height, and fast operation, can realize complicated control algolithm.Its roughly operation principle be: at first; Collect system busbar voltage, load current and MCR branch current analog signals by data acquisition unit; Through A/D conversion and calculate instantaneous values such as system power factor, meritorious and reactive power, be stored among the many mouthfuls of RAM; Processor CPU follow procedure requires from RAM, to read desired parameters; Calculating through control algolithm draws controllable silicon trigger angle set-point; Convert light signal into through electrical-optical conversion interface again, be sent to the excitation module in the MCR field control case through optical fiber.Secondly, excitation module converts trigger impulse and silicon controlled working condition into photosignal again and returns to the control protection module, in order to the status monitoring of realization to excitation module.The automatic operational mode of control protector is judged and protection output is born by data input DI and data output DO.On control algolithm, can realize phase-splitting control, three-phase control, flickering improvement, power factor controlling, idle control, constant voltage control by demands of different.
The excitation module of MCR branch road control protection system is made up of optic electric interface circuit, trigger impulse circuit, pulse amplifying circuit and controllable silicon; After the optic electric interface circuit receives the given signal of light; Generate the analog input signal through opto-electronic conversion; Form the trigger impulse of control thyristor operating angle; Again signal is carried out shaping and amplify, the silicon controlled conducting state is carried out phase shifting control, realize the purpose of dynamic adjustments MCR branch road perception reactive current.
The monitoring module of MCR branch road control protection system is made up of upper monitoring machine, man-machine display interface and other corresponding terminal devices; The upper monitoring machine can be selected industrial computer, industrial flat computer and touch-screen.Through communication interfaces such as RS232, RS485 and CAN buses, with control protector communication unit be connected, upload or under be loaded in various data.The upper monitoring running software has good man computer interface in Windows XP operating system, peripheral hardwares such as configuration keyboard, mouse, printer.Realized that system parameter setting, running state real-time monitoring, operation trend show, protect warning message and various functions such as processing, the inquiry of historical data and operation report printing.Can (comprise voltage, current instantaneous value, voltage, current effective value, active power, reactive power to the quality of power supply of system; Active electrical degree, idle electric degree, power factor, electric current 1---41 subharmonic; Voltage 1---41 subharmonic, voltage flicker, voltage, current imbalance; Electric voltage dropping, overtension, voltage are lost etc.) carry out real-time, continuous monitoring.
The overcurrent protection of MCR branch road is divided into hard protection and two kinds of measures of soft protection; Hard protection is realized by the impulse circuit of the excitation module of MCR branch road control protection system; Belong to mandatory overload protection; When the MCR branch current surpasses set point; Controllable silicon is turn-offed in the direct locking pulse output of impulse circuit, sends the protection alarm signal to the optic electric interface circuit simultaneously, and overcurrent protection appears in notice control protection part MCR branch road.Soft protection is realized through software by the control protection module of MCR branch road control protection system; When the control protection partly detects MCR branch road or load circuit electric current above one section or two sections overcurrent definite values; Send the separating brake instruction through the DO interface to the wiretap that goes out of each branch road, and will protect alarm signal to be uploaded to monitor portion and send warning message, wherein; Overcurrent one segment protect is a fast tripping protection, and overcurrent two segment protects are the protection of band time limit.In addition, system also provides some other protection and warning function.
In order to make the control loop operate as normal, not only working power need be provided, and, even the control power failure will guarantee that also armamentarium is protected; Therefore, the control power-supply system must have power-down protection.The control power-supply system is a power distribution network based on UPS, accomplishing to each functional circuit provides under the prerequisite of working power, guarantees the uninterrupted supply of power supply simultaneously.Be used for to after the action of control power protection, in the processing time that provides whole system to carry out the corresponding failure protection, the assurance system is out of service by the regulation order, and protection equipment is not damaged.
Claims (1)
1.MCR type SVC static dynamic no-power compensation device; Its mainly by the electric power system bus through compensate out wiretap to the compensation bussed supply; And be provided with FC branch road and MCR branch road; Said FC branch road comprises capacitor and constant reactance device; Said MCR branch road comprises magnetic valve type controllable reactor MCR, it is characterized in that, also comprises FC branch protection system, MCR branch road control protection system, control power-supply system, first voltage transformer, second voltage transformer, first current transformer, second current transformer, the 3rd current transformer and the 4th current transformer;
Described FC branch road and MCR branch road are connected with the compensation bus through isolating switch separately; Said first current transformer is arranged between electric power system bus and the compensation bus; Said second current transformer is arranged between FC branch road and the compensation bus; Said the 3rd current transformer is arranged between MCR branch road and the compensation bus; Said the 4th current transformer is arranged between load and the electric power system bus; Said first voltage transformer is connected with the electric power system bus, and said second voltage transformer is connected with the compensation bus;
Said FC branch protection system comprises data acquisition unit, processor CPU and protection output unit, and the data acquisition unit of said FC branch protection system links to each other with first current transformer, second current transformer and FC branch road respectively;
Said MCR branch road control protection system comprises control protection module, monitoring module and excitation module, and said control protection module comprises processor CPU and the communication unit that is connected with processor CPU respectively, data input cell DI, data output unit DO, data sampling unit and optic electric interface circuit; Said monitoring module comprises upper monitoring machine and the display unit and the printer that are connected with the upper monitoring machine respectively, and said upper monitoring machine is connected with the communication unit of monitoring and protection module; Said excitation module comprises optic electric interface circuit, impulse circuit, driving amplifying circuit and the controllable silicon of series connection successively; Described excitation module is connected through the optic electric interface circuit with the monitoring and protection module; The data sampling unit of the control protection module of said MCR branch road control protection system is connected with the 3rd current transformer, the 4th current transformer and first mutual induction of voltage respectively; The impulse circuit of the excitation module of said MCR branch road control protection system is connected with the 3rd current transformer with second voltage transformer respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202054239U CN202103431U (en) | 2011-06-17 | 2011-06-17 | MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202054239U CN202103431U (en) | 2011-06-17 | 2011-06-17 | MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) |
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| CN202103431U true CN202103431U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202054239U Expired - Lifetime CN202103431U (en) | 2011-06-17 | 2011-06-17 | MCR (Magnetically Controlled Reactor)-type static var compensator (SVC) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513133A (en) * | 2013-09-27 | 2014-01-15 | 马钢(集团)控股有限公司 | Device and method for measuring MCR type SVC device dynamic response time |
| CN104459303A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Double-bus self-adaption sampling line selection device |
-
2011
- 2011-06-17 CN CN2011202054239U patent/CN202103431U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513133A (en) * | 2013-09-27 | 2014-01-15 | 马钢(集团)控股有限公司 | Device and method for measuring MCR type SVC device dynamic response time |
| CN103513133B (en) * | 2013-09-27 | 2017-01-04 | 马钢(集团)控股有限公司 | The measurement apparatus of MCR type SVC device dynamic response time and method |
| CN104459303A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Double-bus self-adaption sampling line selection device |
| CN104459303B (en) * | 2014-12-24 | 2016-06-01 | 国家电网公司 | A kind of adaptively sampled line selection apparatus of double-bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121130 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121130 Address after: 250400 Pingyin county power supply company, Zhenxing street, Pingyin County, Ji'nan, Shandong Patentee after: Pingyin County Power Supply Co.,Ltd. Patentee after: State Grid Corporation of China Address before: 250400 Pingyin county power supply company, Zhenxing street, Pingyin County, Ji'nan, Shandong Patentee before: Pingyin County Power Supply Co.,Ltd. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 250400 Zhenxing street, Pingyin County, Ji'nan, Shandong Patentee after: STATE GRID SHANDONG PINGYIN POWER SUPPLY CO. Patentee after: State Grid Corporation of China Address before: 250400 Pingyin county power supply company, Zhenxing street, Pingyin County, Ji'nan, Shandong Patentee before: Pingyin County Power Supply Co.,Ltd. Patentee before: State Grid Corporation of China |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20160606 Address after: 250400 Pingyin City, Shandong Province Kam Kam Road, East District, Kam Kok and the intersection of the northwest corner of the main street Patentee after: PINGYIN POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: State Grid Corporation of China Address before: 250400 Zhenxing street, Pingyin County, Ji'nan, Shandong Patentee before: STATE GRID SHANDONG PINGYIN POWER SUPPLY CO. Patentee before: State Grid Corporation of China |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120104 |