CN201286016Y - Voltage passive control apparatus - Google Patents
Voltage passive control apparatus Download PDFInfo
- Publication number
- CN201286016Y CN201286016Y CNU2008202220877U CN200820222087U CN201286016Y CN 201286016 Y CN201286016 Y CN 201286016Y CN U2008202220877 U CNU2008202220877 U CN U2008202220877U CN 200820222087 U CN200820222087 U CN 200820222087U CN 201286016 Y CN201286016 Y CN 201286016Y
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- unit
- voltage
- switching value
- reactive power
- control
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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
Abstract
The utility model relates to a voltage reactive power control device suitable for the on-load voltage regulation of two transformers in parallel operations, which comprises a voltage reactive power compensation device connected between on-load voltage regulation switch automatic regulators of two transformers in the same transformer substation and a switching capacitor group. The voltage reactive power control device comprises an electricity conversion unit, an electricity acquisition unit, a central control unit, a switching value input unit, a switching value output unit, a control and alarm output unit, and the like. The electricity conversion unit is connected with the central control unit by the electricity acquisition unit; the switching value input terminal of the central control unit is connected with the output terminal of the switching value input unit; and the switching value output terminal of the central control unit are respectively connected with the switching value output unit and the input terminal of the control and alarm output unit. With the voltage reactive power control device, transformer taps can be accurately and reliably regulated when the transformers are in the parallel or divided operation mode to guarantee the stable and reliable operation of the transformer substation; meanwhile, the device has the functions of reactive power compensation control, and the like.
Description
Technical field
The utility model belongs to electric power automatic control equipment technical field, relates to a kind of voltage and reactive power control system that is used for electric power system, transformer station, particularly a kind of voltage and reactive power control system that is fit to two Parallel Operating on-load Regulating Transformers.
Background technology
In electric power system, voltage is stable to be an important indicator of examination power supply quality, also is the important parameter of system's operation.The transmission of system's reactive power not only can reduce the transmission capacity of system, and can cause increase line loss, and the power equipment operating efficiency of electric power system is descended, and causes power wastage and power supply quality to descend.
In recent years, in order to improve the power supply quality of electric power system electric power, burning voltage, the reasonable compensation reactive power has generally been installed on-load tap-changing transformer in the transformer station of various electric pressures, and the power capacitor group of suitable capacity has been installed.How rationally to regulate control on-load tap-changing transformer and power capacitor group, become the key that improves power supply quality and power transmission and transformation efficient, reduces line loss.
The on-load tap-changing transformer control of adopting at present mainly contains two kinds of forms, and a kind of is the VQC controller, and another kind is special-purpose transformer on-load voltage regulating controller.In the practical application, when two transformer fanout operations in a transformer station, adopting above-mentioned two kinds of controllers that transformer is carried out voltage-regulation control can realize substantially, but when two parallel operation of transformers (particularly when the tap changer of two transformers inconsistent), because these two kinds of controllers are controlled two transformers respectively, regulating control procedure is difficult for synchronously, may between two transformers, produce circulation like this, so, existing on-load voltage regulation controller does not generally adopt automatic input at two parallel operation of transformers, can only manually move, be difficult to adapt to service requirement unattended or few man on duty transformer station.And with regard to system balance reactive power aspect, development along with reactive power compensation technology, present various compensation way, from the static compensation to the dynamic compensation, from there being the contact to compensate to contactless compensation,, still also have some practical problems though all obtained certain operating experience, as the idle reliability of sending problem, resonance wave problem, compensation way problem, control device and accuracy problem or the like, these problems still await those skilled in the art and are researched and solved further.
The utility model content
The purpose of this utility model is the problem that prior art exists is solved, and provides a kind of rational in infrastructure, reliable, configuration convenient and flexible installation, the voltage and reactive power control system of automatic Regulation in the time of can realizing the on-load tap-changing transformer paired running.
For achieving the above object and the voltage and reactive power control system of design is a voltage and reactive power compensation control device between the switching control end that is connected in two on-load tap changers of transformers automatic regulators and opening-closing capacitor bank, by the electric weight converting unit, the electric quantity acquisition unit, central control unit, the switching value input unit, the switching value output unit, control, warning output unit and power supply are formed, the output of electric weight converting unit passes to the digital signal input end of central control unit behind the electric quantity acquisition unit, the switching value input of central control unit connects with the output of switching value input unit, the switching value output of central control unit and the input and the control of switching value output unit, the input of warning output unit connects.In the working control process, the real-time parameter collection adopts electric weight converting unit (electric parameters transducer) to realize various power frequency amounts are carried out conversion, carry out data sampling by electric quantity acquisition unit (high-speed a/d modular converter) again, comprehensive on-the-spot various running statuses, (central control unit adopts B﹠amp to adopt programmable computer controller; The PP41 programmable computer controller of R company is called for short PPC) carry out rapid analysis computing and intelligent decision, by the switching value output unit control, warning output unit are controlled at last.
Adopt this device to the principle that transformer carries out on-load voltage regulation control to be: transformer is discrete control when non-paired running mode, adopt by voltage-controlled method; Transformer is when the paired running mode, and its control idea is moved under identical as far as possible transformation ratio for keeping two transformers, in adjustment process, regulate differential little transformer earlier, differential big transformer is regulated in the back, and the differential little transformer of transfer again keeps minimum differential when regulating then; Also no longer carry out second transformer when sending regulating command when first transformer after regulating, first transformer should be got back to original gear.Correspondingly, the principle that the control of the switching of opening-closing capacitor bank combines according to system's reactive power vacancy and idle development trend is considered the influence of voltage and power factor, determines the switching of capacitor group.In order to guarantee the compensation arrangement reliability of operation, in control device, functions such as the control of switching period, locking control, fault alarm are set.Consider the flexibility of compensation arrangement operation, in control device, locking handoff functionality and status data Presentation Function and data communication facility are manually controlled and are controlled automatically in setting on the spot.
Compared with prior art, device described in the utility model mainly contains following characteristics:
One, the utility model has the requirement of two the inconsistent transformer requirement of tap changer paired runnings and the actual conditions of reactive power compensator at this area, under the situation that does not change transformer running status and capacitor group, make it give full play to pressure regulation, inactive power compensation, reach best effect, to improving power supply quality, reduce the loss of circuit and main power equipment, the function and significance with particular importance also has application value widely simultaneously.
Two, this device design philosophy of lead-in surface phase object first in system design, based on various component models, adopt advanced PCC technology to carry out the exploitation of voltage and reactive power control system, the voltage and reactive power control system reliability of exploitation is improved greatly, make this device configuration simple and convenient and have stronger adaptability and a flexibility simultaneously, can be fit to have the transformer station of two on-load tap-changing transformer typical wirings and operational mode, the output controlled quentity controlled variable can according to how many expansions of capacitor group number.
Three, introducing is controlled the separately control thought of enforcement, cooperation with voltage-regulation and reactive power compensation, meets the design principle of dangerous dispersion, has improved the flexibility of substation equipment reliability of operation and operation.
Four, adopt real time execution parameter and device parameter to carry out voltage prediction, utilization operational mode self adaptation and the adaptive Based Intelligent Control scheme of running status, improve the substation equipment operational flexibility, effectively reduced the action frequency of regulator, capacitor switching, improved the reliability of device.
Five, have the multiple standards communication interface, can be connected, can realize pressure regulation, idle networking control, carry out voltage, idle work optimization with a distant place or Local Communication Network network.
Description of drawings
Fig. 1 is a system construction drawing of the present utility model.
Fig. 2 is the theory structure block diagram of a specific embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing the switching control principle of the utility model structure function content, opening-closing capacitor bank and the operational mode that adapts to transformer station automatically are described further
One, the practical structures of each assembly is formed and effect in this device
Referring to accompanying drawing, the utility model relates to one and is connected in two transformer B1 of same transformer station, B2 on load tap changer automatic regulator and opening-closing capacitor bank C
11, C
12, C
13, C
14The switching control end between the voltage and reactive power compensation control device, its hardware designs mainly is made up of electric weight converting unit, electric quantity acquisition unit, central control unit (PPC), switching value input unit, switching value output unit and control, warning output unit, power supply etc.On the assembly connecting structure, the output of electric weight converting unit connects with the digital signal input end of central control unit behind the electric quantity acquisition unit, the switching value input of central control unit connects with the output of switching value input unit, and the input of the switching value output of central control unit and the input of switching value output unit and control, warning output unit connects.The structure composition and the function of each working cell are as described below respectively.
1, electric weight converting unit
The electric weight converting unit is mainly used to realize tested electric weight is converted to the function of linear scale direct voltage output, the GP series electric parameters transducer of the Chinese-foreign joint sea salt Pu Bo of this device employing Electric Machine Co., Ltd, comprise voltage transmitter shown in Fig. 1 and power transducer, be used to finish the conversion of voltage, active power and reactive power.
The special chip of extensive transmitter that GP series electric parameters transducer has adopted asic technology to make, have excellent temperature characterisitic and long-time stability, good anti-surge performance and overload performance, the accuracy of high level and the linearity, do not need frequent effect and maintenance, meet standard-requireds such as IEC, ANSI, BEAMA fully.
2, electric quantity acquisition unit
The electric quantity acquisition unit is the unit that analog signals is converted to digital signal, and this unit adopts two B﹠amp; The AI354 analog quantity input module of R2000 series, this module input signal be+/-10V, 12 bit resolutions, linearity error＜0.1%, input impedance〉20 megaohms, each module has 4 input channels.
3, central control unit (PPC)
Central control unit is the core of this device, is used for realizing various numerical operations, logical operation and control algolithm, and this unit adopts B﹠amp; The PP41 programmable computer controller of R company, programmable computer controller (PPC) is being represented a brand-new control concept, the standard controlled function that it is integrated Programmable Logic Controller (PLC) and the analysis operational capability of industrial computer, real-time multi-task operating system is installed, adopt high-level programming language to carry out modularization programming, provide the excellent development basis for realizing various intelligent control algolithms.PCC also has advanced field bus communication system, can can form diverse network by CAN, RS232, RS485, PROFIBUS, ETHERNET etc., it is a kind of perfectly automatic control equipment, voltage and reactive power control system with its exploitation, reliability height not only, and powerful, satisfy the requirement of voltage and reactive power optimization control fully.CPU in this device product has the multitasking function, has the hardware watchdog circuit, its instruction cycle 0.8 microsecond, and real-time clock resolution is 1 second, and RS232 and CAN are provided two standard communication interfaces.
4, switching value input unit and switching value output output unit
Switching value input and output unit is that state or event signal are converted to digital signal input PPC or convert the digital signal that PPC exports to unit that switching value is exported, and Unit two all adopt B﹠amp; R PP41 series carries module, and this module has 16 switching value input channels and 20 switching value output channels.
5, control, warning output unit
Control, warning output unit adopt relay output, and relay adopts the Omron relay.The switching control loop that is driven by control and warning output unit adopts the GU type, and technical parameter is: contact capacity: 30A, and electrical endurance: 100,000 times, safety authentication: UL E141060; The signal output loop adopts MI 2ploes type, and technical parameter is: contact capacity: 5A, and electrical endurance: 100,000 times, safety authentication: UL E141060.
6, power supply
Power supply adopts the AC/DC24V Switching Power Supply, allows input voltage range: 180V--240V.
Two, capacitor switching control principle
According to the principle that system's reactive requirement amount and change in voltage predicted value combine, comprehensively judge the control capacitor switching.Voltage is divided into 6 grades:
First grade of voltage〉Umax cuts capacitor by force.
Second grade of voltage＜Umax and voltage 〉=Umax-UD only cut and do not throw.
The normal switching of third gear voltage＜Umax-UD and voltage 〉=Umin+UD.
Fourth speed voltage＜Umin+UD and voltage 〉=Umin only throw and do not cut.
The 5th grade of voltage＜Umin and voltage 〉=7.5KV throw capacitor by force.
The 6th grade of voltage＜7.5KV cuts capacitor by force.
UD: after capacitor input or the excision, the changing value of voltage.
Capacitor drops into operation condition: when voltage during at third gear, fourth speed, measure that reactive power drops into reactive power value greater than adjusting, device sends the capacitor input and instructs.When voltage during at the 5th grade, device sends capacitor and throws instruction by force.
Capacitor excision operation condition: when voltage second grade, during third gear, measure reactive power less than the excision reactive power value of adjusting, capacitor excision.When voltage during at first grade, the 6th grade, device sends capacitor and cuts instruction by force.
Three, the operational mode that adapts to transformer station automatically
A. bus section operation: bus 100 is in off-state, and 101 breaker closings are according to the switching of measured value U101, Q1 control C11, C12; 102 breaker closings are according to the switching of measured value U102, Q2 control C21, C22.
B. not partition running of bus (): bus 100 closures, 101 breaker closings, 102 circuit breakers disconnect, and this moment is according to the switching of measured value U101, U102, (Q1+Q2) control C11, C12, C21, C22.Note the cooperation of U101, two voltages of U102 in the work: another voltage is normal value during less than 0.75Ue as one of them, thinks that then the voltage circuit broken string appears in a side bus, and the voltage of normal value is controlled quentity controlled variable.
C. not partition running of bus (two): bus 100 closures, 102 breaker closings, 101 circuit breakers disconnect, and this moment is according to the switching of measured value U101, U102, (Q1+Q2) control C11, C12, C21, C22.Note the cooperation of U101, two voltages of U102 in the work: another voltage is normal value during less than 0.75Ue as one of them, thinks that then the voltage circuit broken string appears in a side bus, and the voltage of normal value is controlled quentity controlled variable.
D. not partition running of bus (three): bus 100 closures, 101 and 102 circuit breakers are all closed, and this moment is according to the switching of measured value U101, U102, (Q1+Q2) control C11, C12, C21, C22; Note the cooperation of U101, two voltages of U102 in the work: another voltage is normal value during less than 0.75Ue as one of them, thinks that then the voltage circuit broken string appears in a side bus, and the voltage of normal value is controlled quentity controlled variable.
Four, transformer carries out the principle of on-load voltage regulation control
Transformer is discrete control when non-paired running mode, adopt by voltage-controlled method; Transformer is when the paired running mode, and its control idea is moved under identical as far as possible transformation ratio for keeping two transformers, in adjustment process, regulate differential little transformer earlier, differential big transformer is regulated in the back, and the differential little transformer of transfer again keeps minimum differential when regulating then; Also no longer carry out second transformer when sending regulating command when first transformer after regulating, first transformer should be got back to original gear.
Claims (3)
1, a kind of voltage and reactive power control system comprises that one is connected in same transformer station two transformers (B1, B2) on-load voltage regulating switch automatic regulator and opening-closing capacitor bank (C
11, C
12, C
13, C
14) the switching control end between the voltage and reactive power compensation control device, it is characterized in that it is by the electric weight converting unit, the electric quantity acquisition unit, central control unit, the switching value input unit, switching value output unit and control, the warning output unit is formed, the output of electric weight converting unit passes to the digital signal input end of central control unit behind the electric quantity acquisition unit, the switching value input of central control unit connects with the output of switching value input unit, the switching value output of central control unit and the input and the control of switching value output unit, the input of warning output unit connects.
2, voltage and reactive power control system according to claim 1 is characterized in that said central control unit and switching value input and output unit adopt the PP41 programmable computer controller that carries switching value input, output module.
3, voltage and reactive power control system according to claim 1 is characterized in that said electric weight converting unit is made of GP series electric parameters transducer, comprises voltage transmitter and power transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202220877U CN201286016Y (en) | 2008-10-28 | 2008-10-28 | Voltage passive control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202220877U CN201286016Y (en) | 2008-10-28 | 2008-10-28 | Voltage passive control apparatus |
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| Publication Number | Publication Date |
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| CN201286016Y true CN201286016Y (en) | 2009-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202220877U Expired - Fee Related CN201286016Y (en) | 2008-10-28 | 2008-10-28 | Voltage passive control apparatus |
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| CN (1) | CN201286016Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859986A (en) * | 2009-12-11 | 2010-10-13 | 成都高新区尼玛电子产品外观设计工作室 | Transformer substation main connection system based on single bus bar partition |
| CN101888064A (en) * | 2009-12-11 | 2010-11-17 | 成都高新区尼玛电子产品外观设计工作室 | Transformer substation main connection system based on medium frequency quenching transformer |
| CN102005766A (en) * | 2010-11-19 | 2011-04-06 | 西安电力高等专科学校 | Control method for reactive compensation of network |
| CN102064527A (en) * | 2010-12-24 | 2011-05-18 | 中电普瑞科技有限公司 | Control and protection system of series compensation device or fault current limiter |
| CN102904257A (en) * | 2011-07-25 | 2013-01-30 | 通用电气公司 | Power distribution system |
| CN103296954A (en) * | 2012-02-24 | 2013-09-11 | 吉林省电力有限公司吉林供电公司 | Parallel transformer tap switch control based on reactive balance method |
| CN103595142A (en) * | 2013-11-29 | 2014-02-19 | 国网安徽省电力公司淮南供电公司 | Control method for converting parallel operation state into split operation state in double-transformer system |
| CN103606968A (en) * | 2013-11-29 | 2014-02-26 | 国网安徽省电力公司淮南供电公司 | Method for controlling split operating state to be converted into parallel operating state in double-transformer system |
| CN106168825A (en) * | 2016-06-28 | 2016-11-30 | 张升泽 | The voltage preprocess method of electronic chip and system |
-
2008
- 2008-10-28 CN CNU2008202220877U patent/CN201286016Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888064A (en) * | 2009-12-11 | 2010-11-17 | 成都高新区尼玛电子产品外观设计工作室 | Transformer substation main connection system based on medium frequency quenching transformer |
| CN101859986A (en) * | 2009-12-11 | 2010-10-13 | 成都高新区尼玛电子产品外观设计工作室 | Transformer substation main connection system based on single bus bar partition |
| CN102005766B (en) * | 2010-11-19 | 2012-11-21 | 西安电力高等专科学校 | Control method for reactive compensation of network |
| CN102005766A (en) * | 2010-11-19 | 2011-04-06 | 西安电力高等专科学校 | Control method for reactive compensation of network |
| CN102064527B (en) * | 2010-12-24 | 2014-03-12 | 中电普瑞科技有限公司 | Control and protection system of series compensation device or fault current limiter |
| CN102064527A (en) * | 2010-12-24 | 2011-05-18 | 中电普瑞科技有限公司 | Control and protection system of series compensation device or fault current limiter |
| CN102904257A (en) * | 2011-07-25 | 2013-01-30 | 通用电气公司 | Power distribution system |
| CN102904257B (en) * | 2011-07-25 | 2016-01-13 | 通用电气公司 | Distribution system |
| CN103296954A (en) * | 2012-02-24 | 2013-09-11 | 吉林省电力有限公司吉林供电公司 | Parallel transformer tap switch control based on reactive balance method |
| CN103595142A (en) * | 2013-11-29 | 2014-02-19 | 国网安徽省电力公司淮南供电公司 | Control method for converting parallel operation state into split operation state in double-transformer system |
| CN103606968A (en) * | 2013-11-29 | 2014-02-26 | 国网安徽省电力公司淮南供电公司 | Method for controlling split operating state to be converted into parallel operating state in double-transformer system |
| CN103606968B (en) * | 2013-11-29 | 2015-11-18 | 国网安徽省电力公司淮南供电公司 | In dual transformer system, split operation is to the control method of paired running State Transferring |
| CN103595142B (en) * | 2013-11-29 | 2015-12-30 | 国网安徽省电力公司淮南供电公司 | In dual transformer system, paired running is to the control method of split operation State Transferring |
| CN106168825A (en) * | 2016-06-28 | 2016-11-30 | 张升泽 | The voltage preprocess method of electronic chip and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20161028 |