CN102110985A - Reactive power compensation device for thyristor cyclically-switched capacitor - Google Patents
Reactive power compensation device for thyristor cyclically-switched capacitor Download PDFInfo
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- CN102110985A CN102110985A CN2011100529007A CN201110052900A CN102110985A CN 102110985 A CN102110985 A CN 102110985A CN 2011100529007 A CN2011100529007 A CN 2011100529007A CN 201110052900 A CN201110052900 A CN 201110052900A CN 102110985 A CN102110985 A CN 102110985A
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- 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 invention relates to a reactive power compensation device for a thyristor cyclically-switched capacitor. The cyclically-switched capacitor is realized based on a DSP+CPLD (digital signal processor + complex programmable logic device) digital controller, and the switching time is selected through positive thyristor valve pressure uT detected by a voltage sensor. The device comprises a reactive power controller and a voltage and current sensor connected with the reactive power controller. The reactive power compensation device has the advantages of reasonable design, simple structure, complete practicability, accurate control, strong anti-jamming capability, quick dynamic response, low cost, high reliability and low maintenance cost; and in addition, the reactive power impact effect for reducing the loads of a thyristor rectifying device or other large-scale motors is obvious, and the system power factor is improved from 0.4-0.7 before compensation to above 0.92.
Description
Technical field
The present invention relates to a kind of thyristor switching cycle reactive power compensation device for capacitor.
Background technology
The moving mine excavator of large-scale fax is the core winning equipment of large-scale mine stope, its scraper bowl volume reaches tens to tens cubes, power resources are electric power, finish the walking of power shovel by shoveling electric drive system, promote, revolution and push-press working, whole power shovel power supply capacity reaches several megavolt-amperes, the maximum working direct current of separate unit drive system reaches several kilo-amperes, owing to promote, load characteristic that mechanisms such as pushing are special and the operation of transmission adopted Thyristor Controlled commutation system, power factor often is in about 0.4～0.7, the place capacity that low power factor causes increases, equipment and line loss increase, line drop increases, voltage fluctuation is violent, degradation harm is very serious under the grid supply quality, and system needs reactive power compensation device.Because during excavator work, reactive power changes, therefore must adopt grading compensation, consider factors such as cost, often adopt thyristor switchable capacitor (TSC) to carry out reactive power compensation.
Summary of the invention
The present invention solves existing in prior technology because the place capacity increase that low power factor causes, equipment and line loss increase, and line drop increases, and voltage fluctuation is violent, the technical problem of degradation under the grid supply quality; Provide that a kind of to reduce the reactive power impact effect that thyristor rectifier device or other large-size machine even loads produced remarkable, improved system reliability, reduced a kind of thyristor switching cycle capacitor (TSC) reactive power compensator of maintenance cost.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of thyristor switching cycle capacitor (TSC) reactive power compensator is characterized in that, realizes the switching cycle capacitor based on the digitial controller of DSP+CPLD, presses u by the thyristor forward valve that voltage sensor senses arrives
TChoose switching constantly, comprise idle compensating control that links to each other successively and the voltage-current sensor that links to each other with described idle compensating control.
Individual reactive power compensator is arranged on the mine excavator, be called thyristor switchable capacitor, English is abbreviated as TSC, main circuit such as Fig. 2.Many groups are arranged during use, carry out switching according to the idle needs of system, need to lack, then only throw one or two group, three or four groups at most, Fig. 1 has four groups.
During switching, all be in the past since first group: 1,12,123,1234, promptly first group of utilization rate is too high, and the 4th group is too low.Therefore we transform, and are called switching cycle, as 12-234-4-41-123.The improvement of the invention that Here it is, this point is realized by the idle compensating control internal program exactly.
Another creationary improvement is choosing of the switching moment.Be to choose by synchronizer in the past, we are that the thyristor forward valve that utilizes voltage sensor senses to arrive is pressed u
TThe peak value of judging supply voltage constantly drops into capacitor constantly at the peak value of supply voltage, and introduces certain stagnant ring nonlinear element at the switching point place, avoids the frequently excision back and forth of switching point place capacitor group.This point realizes that by hardware in the idle compensating control and program hardware has reflected, is about to thyristor forward valve and presses signal u in Fig. 1
TBe incorporated into and carry out choosing of the moment among the CPLD.
At above-mentioned thyristor switching cycle capacitor (TSC) reactive power compensator, described idle compensating control comprises signal conditioning circuit, DSP module, CPLD module, I/O interface, analog-to-digital conversion circuit and the pulse driving circuit that connects successively; Wherein,
The DSP module adopts TMS320 series, mainly finishes collection and processing, system protection and the communication of the calculating of idle detection control algolithm, various data;
The CPLD module adopts EPM7128AETI100, realizes that capacitor switching algorithm and trigger impulse generate, and simultaneously, monitors in real time from the switching value status input signal of IO plate input dsp board, and handles with the form notice DSP that interrupts;
Analog-to-digital conversion circuit adopts 14 bit synchronization sampling ADC chip MAX1320ECM.
Therefore, the present invention has following advantage: 1. and reasonable in design, simple in structure and complete practicality; 2. remarkable for reducing the reactive power impact effect that thyristor rectifier device or other large-size machine even loads produced, system power factor 0.4～0.7 bringing up to more than 0.92 before compensate; 3. control is accurate, strong interference immunity, and dynamic response is fast, and cost is lower, the reliability height, maintenance cost is low.
Description of drawings
Fig. 1 is the scheme schematic diagram;
Fig. 2 is one group of thyristor switchable capacitor reactive power compensator main circuit topology;
Fig. 3 is a thyristor switchable capacitor reactive power compensator control system program flow diagram;
Fig. 4 is the TSC numerical control system.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
A kind of thyristor switching cycle capacitor (TSC) reactive power compensator is characterized in that, comprises idle compensating control that links to each other successively and the voltage-current sensor that links to each other with described idle compensating control.
The present invention adopts thyristor and diode inverse parallel as noncontacting switch, reactor suppresses to shove, quick and stable ground drops into or the excision compensation condenser, as Fig. 2, utilize voltage sensor senses to arrive thyristor forward valve and press the peak value moment of judging supply voltage, as Fig. 1, employing realizes thyristor switchable capacitor reactive power compensation control algolithm and switching cycle mode based on the digitial controller of DSP+CPLD, the idle amount that DSP detects and computing system needs, CPLD realizes that switching algorithm and trigger impulse generate, and the embodiment principle in the 2300XP power shovel as shown in Figure 1.Four groups of thyristor switchable capacitor reactive power compensators are arranged among the figure, be installed in respectively on two secondary of main transformer.Supply voltage u and source current i
A1, i
A2Behind transducer, send into modulate circuit, supercircuit is wherein arranged in the modulate circuit i
A1, i
A2Become a signal i after superposeing and give digital signal processor DSP.The reactive power compensation amount that DSP is required according to the voltammeter calculation system, judging current again is switching or excision thyristor switchable capacitor reactive power compensator, and gives CPLD with judged result.CPLD provides pulse command according to judged result in the suitable moment, conducting or turn-off respective thyristor, thus reach the purpose of reactive power compensation.
In The whole control system, digital signal processor DSP is according to the idle amount of system voltage, electric current computing system needs, be real-time reactive power detection module, CPLD realizes that above-mentioned switching algorithm and trigger impulse generate, be the switching control assembly, control impuls is amplified the rear drive thyristor through the pulse transformer isolation, has numerically controlled plurality of advantages such as control is accurate, response is fast, strong interference immunity is easy to maintenance.
As Fig. 2 is main circuit topology (one group), whole device electric capacity is divided into many groups, thyristor switchable capacitor (TSC) adopts the Δ connection, and the contactless throw-in and throw-off switch is made of thyristor and diode inverse parallel, the rush of current that may cause when utilizing series inductance to suppress to drop into electrical network.Whole thyristor switchable capacitor reactive power compensator main circuit topology (one group), three characteristics of the middle term load balancing, so adopt the Δ connection, and can reduce the current capacity of thyristor pipe valve, effectively suppress 3 times of subharmonic, avoid current in middle wire.For reducing installation cost, reducing the control system workload, the contactless throw-in and throw-off switch is made of thyristor and diode inverse parallel among the figure.When thyristor is a forward voltage, and when on the gate pole triggering signal being arranged, make the thyristor conducting, capacitor drops into, when removing start pulse signal, current over-zero, thyristor is ended, capacitor excises from electrical network, and the residual voltage during excision is the line voltage true amplitude, excise capacitor at every turn after, electric capacity makes the electric capacity both end voltage remain the power line voltage peak value by diode from grid charging, when thyristor drops into again, make the trigger impulse sequence begin to trigger at the power line voltage peak value, guarantee that the combined floodgate impulse current is less.Excision ends from the 1st power electronic device that output to of excision instruction during capacitor because the not property controlled of diode, need could be cut greater than half cycle, but the mute time be no more than 1 cycle, promptly less than 20ms.The rush of current that may cause when series inductance is used for suppressing to drop into electrical network.
Mode the present invention of capacitor switching takes the switching cycle that divides into groups, reactive requirement switching according to electrical network, it is interrupted adjustable dynamic reactive compensator, after each group electric capacity is cut, next backing up goes into to be automatically brought to next group, so circulation, and every group of electric capacity uses average, be not subjected to the influence of the reactive requirement of electrical network, overcome the fixedly too high and flimsy shortcoming of switching partition capacitance frequency of utilization of classification.System reliability and redundancy have been improved.When supply voltage equates with capacitance voltage, promptly when supply voltage is in peak value, carry out the electric capacity input, otherwise will produce impulse current, damage device or bring vibration to power supply.Choose the peak value of supply voltage, this programme utilizes voltage sensor senses to arrive thyristor forward valve and presses u
TThe peak value of judging supply voltage constantly and does not pass through synchronizer,
As shown in Figure 3, mode for capacitor switching of the present invention, switching program control flow process, electric capacity is taked the switching cycle that divides into groups, according to the reactive requirement switching of electrical network, it is interrupted adjustable dynamic reactive compensator, after each group electric capacity was cut, next backing up went into to be automatically brought to next group, so circulation, every group of electric capacity uses on average, has improved system reliability and redundancy.
As Fig. 1 choosing for the switching moment of the present invention, do not pass through synchronizer, but utilize voltage sensor senses to thyristor forward valve press judge supply voltage peak value constantly, peak value at supply voltage drops into capacitor constantly, and, avoid the frequently excision back and forth of switching point place capacitor group in the certain stagnant ring nonlinear element of switching point place introducing.
The present invention is by the real-time sampling current/voltage, calculate reactive power in real time with the root mean square algorithm, this process is finished in digital signal processor DSP, the reactive power detection module realizes that reactive power and power factor detect in real time in real time, promptly total reactive power and the total power factor to RPC system and converter system detects in real time in the 2300XP power shovel, as the foundation of capacitor switching.The switching control assembly produces respective drive signal and comes the corresponding compensation arrangement of switching according to the testing result of real-time reactive power detection module.
The detection of reactive power takes following method to calculate:
(4)
U is a voltage effective value in the formula, and I is a current effective value,
,
Be respectively the equal interval sampling value of electric current and voltage, P is an active power, and S is an apparent power, and Q is a reactive power.The algorithm computation process is finished in digital signal processor DSP.
The digitial controller that the present invention is based on DSP+CPLD is realized thyristor switchable capacitor reactive power compensation control, its digitized control system flow chart as shown in Figure 3, hardware control system constitutes as shown in Figure 4.Control moduleization mainly is made up of DSP, CPLD, signal conditioning circuit, I/O, pulse driving circuit etc.Control module can adopt PROFIBUS DP bus communication mode with the communication of PLC; Electrical signal collection is by voltage-current sensor, and the output signal of telecommunication of transducer is delivered to signal conditioning circuit, isolates the back to DSP; Control module is finished by optical fiber the control and the state acquisition of thyristor driver pulse.The I/O mouth is mainly used to the status signal of sense switch amount input, and the output action signal is isolated and level conversion.
DSP mainly finishes the collection and the functions such as processing, system protection and communication of the calculating of idle detection control algolithm, various data, dsp chip adopts TMS320 series, extend out SRAM and be used for on-line debugging, extend out non-volatile NVRAM chip DS1744 simultaneously, under the situation of the system failure, control module preserves its on-the-spot important parameter and temporal information get off, fault trace inquiry after being used for, convenient for maintaining; Simultaneity factor also needs to store some important configuration parameters.CPLD adopts EPM7128AETI100-7; realize that capacitor switching algorithm and trigger impulse generate; simultaneously; monitoring in real time is from the switching value status input signal of IO plate input dsp board; and handle with the form notice DSP that interrupts; thereby alleviated the burden of DSP, improved the response speed power down protection and interrupted.Analog-to-digital conversion circuit adopts 14 bit synchronization sampling ADC chip MAX1320ECM, the requirement of sampling phase information when having satisfied High Accuracy Control.Bus interface is responsible for and the PLC communication.Power monitoring chip TPS3705 provides electrification reset and hand-reset function.Signal regulating panel be responsible for to analog signal isolate, filtering and level conversion, deliver to DSP and handle.In order to guarantee that control unit is not subjected to the interference of major loop forceful electric power and being perfectly safe of operating personnel, realize the isolation fully of major loop forceful electric power and control loop light current, isolate amplification by pulse transformer between control module and the thyristor.
The framework that control module of the present invention adopts the DSP+CPLD of Highgrade integration has saved a large amount of analogue devices, has reduced the complexity of circuit, improves the reliability of device.Be easy to be connected and carry out transfer of data, be convenient to failure diagnosis, strengthen protection and function for monitoring, make system intelligent with upper system.
In addition, controller also has very strong autgmentability, only needs to revise DSP and CPLD program, gets final product six groups of switching cycles or more thyristor switchable capacitor reactive power compensator, can be applied to other industrial circle easily.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technical staff of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (2)
1. a thyristor switching cycle reactive power compensation device for capacitor is characterized in that, realizes the switching cycle capacitor based on the digitial controller of DSP+CPLD, presses u by the thyristor forward valve that voltage sensor senses arrives
TChoose switching constantly, this device comprises the voltage-current sensor that reactive controller and described reactive controller link to each other.
2. thyristor switching cycle reactive power compensation device for capacitor according to claim 1, it is characterized in that described idle compensating control comprises signal conditioning circuit, DSP module, CPLD module, I/O interface, analog-to-digital conversion circuit and the pulse driving circuit that connects successively; Wherein,
The DSP module adopts TMS320 series, mainly finishes collection and processing, system protection and the communication of the calculating of idle detection control algolithm, various data;
The CPLD module adopts EPM7128AETI100, realizes that capacitor switching algorithm and trigger impulse generate, and simultaneously, monitors in real time from the switching value status input signal of IO plate input dsp board, and handles with the form notice DSP that interrupts;
Analog-to-digital conversion circuit adopts 14 bit synchronization sampling ADC chip MAX1320ECM.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795065A (en) * | 2012-10-31 | 2014-05-14 | 广州亚虎电力有限公司 | Transformer substation power compensation device and power compensation method |
| CN109728588A (en) * | 2019-03-05 | 2019-05-07 | 国家电网有限公司 | A kind of thyristor sub-controlling unit based on current compensation |
| CN110011325A (en) * | 2019-03-22 | 2019-07-12 | 安徽一天电能质量技术有限公司 | Reactive compensation and three-phase equilibrium device and QR algorithm |
| CN110955178A (en) * | 2019-11-26 | 2020-04-03 | 胜业电气股份有限公司 | Electric energy quality intelligent controller based on DSP technology |
| CN111383780A (en) * | 2018-12-27 | 2020-07-07 | 核工业西南物理研究院 | Synchronous digital trigger system for multiple sets of thyristor pulse power supplies |
| CN114325121A (en) * | 2021-12-28 | 2022-04-12 | 重庆玖奇科技有限公司 | Capacitance capacity detection method and reactive compensation control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404197A (en) * | 2002-10-16 | 2003-03-19 | 武汉大学 | Dynamic split-phase compensation method and device for reactive power |
| CN2544452Y (en) * | 2002-06-15 | 2003-04-09 | 乐清市旭日无功动态补偿设备厂 | Low-voltage idle dynamic compensator |
| CN101938130A (en) * | 2010-09-15 | 2011-01-05 | 哈尔滨工业大学 | High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof |
-
2011
- 2011-03-05 CN CN2011100529007A patent/CN102110985A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2544452Y (en) * | 2002-06-15 | 2003-04-09 | 乐清市旭日无功动态补偿设备厂 | Low-voltage idle dynamic compensator |
| CN1404197A (en) * | 2002-10-16 | 2003-03-19 | 武汉大学 | Dynamic split-phase compensation method and device for reactive power |
| CN101938130A (en) * | 2010-09-15 | 2011-01-05 | 哈尔滨工业大学 | High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 吴伟敏: "低压配网中TSC型动态无功补偿装置的设计与应用", 《自动化与信息工程》, no. 03, 30 September 2006 (2006-09-30) * |
| 陈乐柱等: "基于DSP+CPLD的新型高压连续无功补偿控制器的研制", 《自动化与仪表》, no. 01, 25 January 2007 (2007-01-25) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795065A (en) * | 2012-10-31 | 2014-05-14 | 广州亚虎电力有限公司 | Transformer substation power compensation device and power compensation method |
| CN103795065B (en) * | 2012-10-31 | 2016-04-13 | 广州亚虎电力有限公司 | A kind of transformer station's power compensating device and power compensating method |
| CN111383780A (en) * | 2018-12-27 | 2020-07-07 | 核工业西南物理研究院 | Synchronous digital trigger system for multiple sets of thyristor pulse power supplies |
| CN109728588A (en) * | 2019-03-05 | 2019-05-07 | 国家电网有限公司 | A kind of thyristor sub-controlling unit based on current compensation |
| CN110011325A (en) * | 2019-03-22 | 2019-07-12 | 安徽一天电能质量技术有限公司 | Reactive compensation and three-phase equilibrium device and QR algorithm |
| CN110011325B (en) * | 2019-03-22 | 2022-12-13 | 安徽一天电能质量技术有限公司 | Reactive compensation and three-phase balancing device and quick response algorithm |
| CN110955178A (en) * | 2019-11-26 | 2020-04-03 | 胜业电气股份有限公司 | Electric energy quality intelligent controller based on DSP technology |
| CN114325121A (en) * | 2021-12-28 | 2022-04-12 | 重庆玖奇科技有限公司 | Capacitance capacity detection method and reactive compensation control system |
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Application publication date: 20110629 |