CN201260080Y - Device for passive compensation and harmonic wave control for intelligent electric power system - Google Patents
Device for passive compensation and harmonic wave control for intelligent electric power system Download PDFInfo
- Publication number
- CN201260080Y CN201260080Y CNU2008201893475U CN200820189347U CN201260080Y CN 201260080 Y CN201260080 Y CN 201260080Y CN U2008201893475 U CNU2008201893475 U CN U2008201893475U CN 200820189347 U CN200820189347 U CN 200820189347U CN 201260080 Y CN201260080 Y CN 201260080Y
- Authority
- CN
- China
- Prior art keywords
- current
- power
- apf
- voltage
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02E40/20—Active power filtering [APF]
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The utility model relates to a reactive power compensation and harmonic suppression device of an intelligentized power system, which comprises a DSP micro-processing system, a current and voltage sampler, a TSF controller and an active power filter APF, wherein, the current and voltage sampler is used to detect the current and voltage in the running state rapidly, and transmits digital sampled signals to the DSP micro-processing system through A/D conversion; the DSP processing system performs discrete Fourier transform or wavelet analysis to the sampled signals, and converts and outputs analog control signals after the operation; the TSF controller comprises a passive power filter PPF and a static reactive compensation SVC, and controls a thyristor SCR or a novel power electronic device IGBT to throw and cut a filter compensating device automatically according to the control signals; and the active power filter APF includes links of selective harmonic detection, voltage control and current control. The utility model can inhibit the pollution to legs of circuit by harmonic current produced by non-linear load and the influence on load by harmonic voltage of power network, reduce the capacity of the active filter, and increase power factors.
Description
Technical field
The utility model relates to electrical equipment technical field, relates in particular to the device of a kind of intelligent electric power system's reactive power compensation and harmonic wave control.
Background technology
In electric power system,, often adopt various reactive power compensators for saving energy and decreasing loss, raising quality of voltage and economy operation of power grid level.In recent years, the distribution non-linear equipment is widely applied, and the principal contradiction that influences the grid voltage waveform quality stems from non-linear electrical equipment, that is to say that non-linear electrical equipment is main harmonic source, non-linear electrical equipment mainly contains following four big classes: arc heating equipment: as arc furnace, electric welding machine etc.; The direct-flow electricity utilization apparatus of AC rectification: as electric railway, electrolysis, plating etc.; AC rectification another mistake becomes power consumption equipment: as frequency control, convertible frequency air-conditioner etc.; Switch power supply equipment: as intermediate frequency furnace, color television set, computer, electron rectifier etc.These loads mostly have the characteristics of non-linear, impact and disequilibrium, are in operation to produce a large amount of harmonic waves, and these harmonic waves have caused reactive power compensator and had a strong impact on.
In electric power system, for certain subharmonic, the shunt capacitor of using as reactive power compensation is if then can overvoltage occur with the system reactance generation resonance that is perception and work the mischief.When the harmonic ratio of reactive power compensator place of operation was serious, voltage, current waveform had very big distortion, and the transmission of capacitor switching control signal will be affected, thereby might cause the malfunction or the tripping of device.Shunt capacitor is also very big to the influence of mains by harmonics on the other hand.If it is incorrect that capacitive reactance capacitor and system's induction reactance cooperate, will cause the serious amplification of mains by harmonics voltage and current, bring very big damage can for capacitor itself.As seen, reactive power compensation and harmonic wave control both sides relation are close.The device that produces harmonic wave mostly is the device that consumes fundamental wave reactive power power; The device of administering harmonic wave also is the device of compensating reactive power usually.Therefore, in order to seek to realize simultaneously the device of reactive power compensation and harmonic wave control, just the two must be combined and study.
The utility model content
The utility model is at the above-mentioned defective of prior art, provide the device of a kind of intelligent electric power system's reactive power compensation and harmonic wave control that Active Power Filter-APF APF, passive power filter PPF and static reactive SVC three are organically combined use, suppress harmonic current that nonlinear load produces to the influence of the harmonic voltage of the pollution of grid branch and electrical network to load, make the active filter capacity reduce and remedy passive filter defective, improve power factor.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: comprise that DSP microprocessing systems, peripheral communication apparatus, A/D conversion, D/A conversion, current-voltage sampling device, zero passage detection, PLL phase-locked loop, TSF controller, Active Power Filter-APF APF form.16 high speed and fixed-point dsp chip TMS320LF2407A that adopt TI company are as control and arithmetic core.The voltage and current of testing circuit sampling controlled device, sampled voltage and electric current are sent to respectively and carry out discrete fourier transform or wavelet analysis among the DSP, store into then among the public RAM of a slice.The harmonic wave situation of analytical calculation controlling object again and idle situation, at harmonic wave that draws and idle situation, calculate respectively in different structure in compensation and the result and the parameters needed condition of filtering, compare then to determine suitable structure, connect and close controlled thyristor to control system output control signal respectively then, system is controlled.
Described DSP treatment system is carried out discrete fourier transform or wavelet analysis to sampled signal.
Described peripheral communication apparatus mainly uses RS232/485 and external equipment to converse or human-computer dialogue.
Described A/D conversion is analog signal conversion to be become data are, signal uses for microprocessor.
Described D/A conversion is to convert data-signal to analog signal to drive the peripheral unit operation.
Described TSF controller comprises passive power filter PPF and static reactive SVC, thyristor SCR or novel electric power electric device IGBT automatic switching filtering compensation device TSF.
Described Active Power Filter-APF APF detects link, voltage control and Current Control link by selective harmonic and forms as the novel electric power electric device of a kind of dynamic inhibition harmonic wave and compensating reactive power.Described current/voltage detects the current/voltage that fast detecting goes out running status, and by becoming the numeric type input signal behind the A/D, with computer after testing, computing, differentiation be after D/A becomes analog output signal, realize power system reactive power compensation and harmonic wave control.
Described PLL phase-locked loop, it is phase-locked synchronized sampling circuit, for eliminating of the influence of the asynchronous and period measurement error of sampling to certainty of measurement, the cycle of improving measured signal change or the period measurement error to the influence of measurement result, the output frequency of voltage controlled oscillator can be followed the tracks of the transient change frequency of input signal in the phase-locked loop, electrical quantity is carried out Measurement and analysis, thereby make computer Electrical Measurement Technology and method have more generality.
Described zero passage detection is the zero crossing that detects alternating current, it is the plus-minus electric cross point detection of alternating current, CPU carries out the controllable silicon triggering of phase variable after zero passage, near conducting when making CPU control double-bang firecracker thyristor the zero point of alternating current is to prevent because of the excessive thyristor that burns out of conducting immediate current.
The beneficial effects of the utility model are: can instantaneously detect each harmonic, and instantaneous measuring gained merit with idle; Can compensate the optional frequency harmonic wave on a large scale, temperature influence not, overload can not take place, dynamically send or absorb var, need with bucking-out system var ground, and Intellectualized monitoring and communication, closed-loop control adds by DSP high speed detection and computing, guarantee filtering control accurately effectively, communication interface can with the PC networking monitoring.
Description of drawings
Fig. 1 is the utility model parallel connection mixed type electric energy compensation principle block diagram.
Fig. 2 is the utility model parallel connection mixed type Active Power Filter-APF APF theory diagram.
Fig. 3 is the utility model parallel connection mixed type system hardware structure figure.
Embodiment
Below in conjunction with embodiment the utility model is described in further detail.
Shown in accompanying drawing 1, the utility model comprises that DSP microprocessing systems, peripheral communication apparatus, A/D conversion, D/A conversion, current-voltage sampling device, zero passage detection, PLL phase-locked loop, TSF controller, Active Power Filter-APF APF form.Its basic principle: Current Transformer is gathered the electric current on the DC line, sample through A/D, the current signal of gained is carried out the processing of harmonic wave separation algorithm, obtain the harmonic reference signal, modulation signal as PWM, compare with triangular wave, thereby the switching signal of obtaining, remove to control the IGBT single-phase bridge with this switching signal, principle according to the PWM technology, with the switching signal reversal connection of upper and lower bridge arm, just can obtain with line on harmonic signal equal and opposite in direction, harmonic current that direction is opposite, the harmonic current on the line is balanced out.This is the feedfoward control part.Harmonic component with electric current on the line behind the active filter access point feeds back again, as the input of adjuster, adjusts the error of feedfoward control, finally obtains the source current of expecting.。
Shown in accompanying drawing 2, the utility model parallel connection mixed type Active Power Filter-APF APF comprises three phase and four wire circuit system 1, offset current generation circuit 2, and DSP control system 3, voltage and current detection circuit 4 is formed.
Described three phase and four wire circuit system 1 mainly is that power supply and nonlinear load are formed, and the system of power supply is provided for load;
Described offset current generation circuit 2 mainly by inductor and S1, S2, S3, S4, S5, S6, S7, S8 totally eight novel electric power electric device IGBT form, S1, S2, S3, S4, S5, S6 novel electric power electric device IGBT constitute actual compensating current generator.S7, S8 constitute the harmonic current compensation to zero line.
Described DSP control system 3 is by the DSP microprocessor, and A/D converter, D/A converter, PI control circuit and drive circuit are formed;
Described voltage and current detection circuit 4 is made up of voltage sensor, current sensor, zero passage transducer and phase-locked loop pll.Described PI control circuit is with the feedback signal of voltage sensor and is input to the feedback end of pi regulator through the electric weight buffer circuit, digital quantity after the computing outputs to dsp processor through the D/A module and has comprised rising oblique wave function and decline oblique wave function, calculate the size of the given signal of regulating through dsp processor, it mainly acts on is to obtain response fast when changing set-point significantly.
Basic functional principle is: the current i that detects nonlinear load by Hall element
La, i
Lb, i
LcSend into instruction current and produce circuit after current signal conditioning, the instruction current generation module is that the DSPTMS320LF2407 by TI company is that core is set up.DSP sends into the current tracking control circuit by outside D/A after calculating the harmonic wave and reactive current that needs compensation.Hall element detects the current i of Active Power Filter-APF main circuit
Ca, i
Cb, i
CcAfter the current signal conditioning, also send into the current tracking control circuit, the current tracking control circuit is sent the gate switch drive signal to the main circuit offset current and instruction electric current chain rate that stagnates after, drive circuit is accepted the pwm signal from prime current tracking control circuit, and through isolating the switching tube that amplifies the rear drive main circuit, circuit with the control principal current is followed the variation of instruction current, finally reaches the purpose of real-Time Compensation harmonic wave and reactive power.Voltage sensor senses current transformer DC side total voltage is sent into instruction current generation circuit after the voltage signal conditioning, by rational control stablizing with the joint dc voltage that withers.Startup, shutoff and protection module be by the startup and the shutoff of certain time sequence control device, and failure protection functions such as the overcurrent of generator, overvoltage, overheated, phase shortage.
Shown in accompanying drawing 3, described Active Power Filter-APF APF adopts thyristor or IGBI to realize the contactless automatic switching of filter as fling-cut switch, continuously frequent switching bank of filters and do not influence switch and life of capacitors.But harmonic current in the filter filtering appts, improve voltage waveform distortion, reactive power compensation is carried out in the variation of THE FAST TRACKING SYSTEM FOR reactive current on the spot, improve user's power factor, reduce power consumption, stablize busbar voltage, in the switching process, adopt high-power thyristor current zero-crossing point switching technology, realize zero current input, zero current excision, no-flashy-flow, fast dynamic response: the THE FAST TRACKING SYSTEM FOR reactive load changes, real-time dynamic response switching, system response time≤20ms.
As preferred implementation of the present utility model, described Active Power Filter-APF APF6 adopts novel electric power electric device IGBT.
Preferably, automatic switching filtering compensation device TSF5 adopts thyristor SCR or novel electric power electric device IGBT.
The utility model uses three-phase four-wire system, can adjust current in middle wire and solve three-phase imbalance, also can adjust power factor from the variation of motion tracking load, and the power factor of electrical network is remained on more than 0.95.Intelligentized management function with data such as realizing instantaneous switching control, distribution parameter, the quality of power supply; kinds of protect functions such as over-and under-voltage protection, power-off protection, short circuit and overcurrent protection, temperature control protection, power-off protection; 11 kinds of large scale display functions such as electrical quantity such as voltage, electric current, reactive power, active power, power factor, and can realize on-line monitoring and distant place remote measurement, remote signalling, remote regulating by external communications equipment.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (5)
1, the device of a kind of intelligent electric power system's reactive power compensation and harmonic wave control is characterized in that, comprises DSP microprocessing systems, current-voltage sampling device, TSF controller, Active Power Filter-APF APF:
Current/voltage when described current-voltage sampling device is used for the fast detecting running status, and the numeric type sampled signal is sent to the DSP microprocessing systems by A/D conversion;
Described DSP treatment system sampled signal is carried out discrete fourier transform or wavelet analysis, computing after D/A conversion output analog control signal to TSF controller and Active Power Filter-APF APF;
Described TSF controller comprises passive power filter PPF and static reactive SVC, according to control signal control thyristor SCR or novel electric power electric device IGBT automatic switching filtering compensation device;
Described Active Power Filter-APF APF is made up of selective harmonic detection, voltage control and Current Control link as the power electronic equipment that dynamically suppresses harmonic wave and compensating reactive power.
2, the device of intelligent electric power system's reactive power compensation according to claim 1 and harmonic wave control, it is characterized in that: also comprise zero passage detection and PLL phase-locked loop, described zero passage detection detects the zero crossing of alternating current, the controllable silicon variable at the laggard line phase of zero passage triggers near conducting when making the double-bang firecracker thyristor zero point of alternating current; Described PLL phase-locked loop is used for eliminating the asynchronous and period measurement error of sampling, and the cycle of improving measured signal changes or the period measurement error.
3, the device of intelligent electric power system's reactive power compensation according to claim 1 and harmonic wave control, it is characterized in that: also comprise peripheral communication apparatus, described peripheral communication apparatus is connected with external equipment by RS232/485.
4, the device of intelligent electric power system's reactive power compensation according to claim 1 and harmonic wave control is characterized in that: described Active Power Filter-APF APF adopts power electronic device IGBT.
5, the device of intelligent electric power system's reactive power compensation according to claim 1 and harmonic wave control is characterized in that: described TSF adopts thyristor SCR or power electronic device IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201893475U CN201260080Y (en) | 2008-08-29 | 2008-08-29 | Device for passive compensation and harmonic wave control for intelligent electric power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201893475U CN201260080Y (en) | 2008-08-29 | 2008-08-29 | Device for passive compensation and harmonic wave control for intelligent electric power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201260080Y true CN201260080Y (en) | 2009-06-17 |
Family
ID=40774317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201893475U Expired - Fee Related CN201260080Y (en) | 2008-08-29 | 2008-08-29 | Device for passive compensation and harmonic wave control for intelligent electric power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201260080Y (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895119A (en) * | 2010-03-18 | 2010-11-24 | 艾默生网络能源有限公司 | Compensation system of parallel-type active electric power filter |
| CN101924366A (en) * | 2010-08-19 | 2010-12-22 | 上海浦元自动化科技有限公司 | Distributed active filter |
| CN102214923A (en) * | 2011-06-01 | 2011-10-12 | 郑卫平 | Active filter controller based on double-DSP (Digital Signal Processing) and FPGA (Field-Programmable Gate Array) control system |
| CN102403957A (en) * | 2011-11-08 | 2012-04-04 | 厦门大学 | Harmonic-free frequency conversion speed adjusting device |
| CN102593848A (en) * | 2012-03-15 | 2012-07-18 | 东营爱特机电技术有限责任公司 | APF and TSF hybrid compensation device for electric rig |
| CN102624001A (en) * | 2012-04-20 | 2012-08-01 | 上海润珏机电科技有限公司 | Hybrid electric filtering device based on triple harmonic active filter |
| CN102983579A (en) * | 2012-11-15 | 2013-03-20 | 成都星宇节能技术股份有限公司 | High-power dynamic switching unit and implementation method thereof |
| CN103269077A (en) * | 2013-05-29 | 2013-08-28 | 国家电网公司 | Harmonic suppression device of magnetically controlled reactor |
| CN103454519A (en) * | 2013-07-31 | 2013-12-18 | 广东电网公司电力科学研究院 | System and method for calculation/liquid crystal display of electrical parameters of active power filter |
| CN103607133A (en) * | 2013-11-29 | 2014-02-26 | 科大智能科技股份有限公司 | Three-phase bridge PWM converter and active power filter formed by same |
| 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 |
| CN103812121A (en) * | 2014-03-04 | 2014-05-21 | 北京富机达能电气产品股份有限公司 | High voltage intelligence compensation device |
| CN104362631A (en) * | 2014-11-06 | 2015-02-18 | 张文景 | Control method for high-power reactive and harmonic dynamic hybrid compensation system |
| CN104393605A (en) * | 2014-10-23 | 2015-03-04 | 哈尔滨工业大学 | Reactive continuous compensation control method for thyristor switched filter |
| CN104466991A (en) * | 2014-12-24 | 2015-03-25 | 安徽天沃电气技术有限公司 | Control method for novel thyristor-fast-switched capacitor banks |
| CN104659808A (en) * | 2015-01-20 | 2015-05-27 | 东北大学 | Microgrid voltage type self-synchronizing inversion device and method with voltage perturbation estimator |
| CN105186515A (en) * | 2015-07-29 | 2015-12-23 | 山东蓝天电能科技有限公司 | Hybrid power filtering control system |
| CN105743104A (en) * | 2016-04-25 | 2016-07-06 | 哈尔滨理工大学 | Controller and control method for reactive compensation and low-order harmonic current suppression of power grid |
| CN105811419A (en) * | 2016-04-25 | 2016-07-27 | 哈尔滨理工大学 | Control method for accurately restraining power grid harmonics |
| CN106685209A (en) * | 2017-02-26 | 2017-05-17 | 合肥科威尔电源系统有限公司 | Interlaced parallel bridge-less PFC circuit controller and control method therefor |
| CN109873432A (en) * | 2017-12-04 | 2019-06-11 | 逸节电子有限公司 | System for carrying out power factor and harmonic correction in power grid |
| CN110098613A (en) * | 2018-01-29 | 2019-08-06 | 东方博沃（北京）科技有限公司 | TSF reactive compensation and filtering control system |
| CN111193264A (en) * | 2019-11-08 | 2020-05-22 | 浙江晟泰电气有限公司 | Comprehensive control method for power quality control |
| CN111550913A (en) * | 2020-05-20 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Phase locking device and air conditioner |
| CN115622090A (en) * | 2022-10-27 | 2023-01-17 | 伊犁职业技术学院 | Three-phase load unbalance degree treatment method and device and transformer |
| CN117674178A (en) * | 2024-01-31 | 2024-03-08 | 国网冀北电力有限公司 | Device for improving power grid environment |
-
2008
- 2008-08-29 CN CNU2008201893475U patent/CN201260080Y/en not_active Expired - Fee Related
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895119A (en) * | 2010-03-18 | 2010-11-24 | 艾默生网络能源有限公司 | Compensation system of parallel-type active electric power filter |
| CN101895119B (en) * | 2010-03-18 | 2012-11-21 | 艾默生网络能源有限公司 | Compensation system of parallel-type active electric power filter |
| CN101924366A (en) * | 2010-08-19 | 2010-12-22 | 上海浦元自动化科技有限公司 | Distributed active filter |
| CN102214923A (en) * | 2011-06-01 | 2011-10-12 | 郑卫平 | Active filter controller based on double-DSP (Digital Signal Processing) and FPGA (Field-Programmable Gate Array) control system |
| CN102403957A (en) * | 2011-11-08 | 2012-04-04 | 厦门大学 | Harmonic-free frequency conversion speed adjusting device |
| CN102593848A (en) * | 2012-03-15 | 2012-07-18 | 东营爱特机电技术有限责任公司 | APF and TSF hybrid compensation device for electric rig |
| CN102593848B (en) * | 2012-03-15 | 2014-08-27 | 东营爱特机电技术有限责任公司 | APF and TSF hybrid compensation device for electric rig |
| CN102624001A (en) * | 2012-04-20 | 2012-08-01 | 上海润珏机电科技有限公司 | Hybrid electric filtering device based on triple harmonic active filter |
| CN102624001B (en) * | 2012-04-20 | 2014-10-15 | 上海润珏机电科技有限公司 | Hybrid electric filtering device based on triple harmonic active filter |
| 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 |
| 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 |
| CN102983579A (en) * | 2012-11-15 | 2013-03-20 | 成都星宇节能技术股份有限公司 | High-power dynamic switching unit and implementation method thereof |
| CN103269077B (en) * | 2013-05-29 | 2016-02-03 | 国家电网公司 | A kind of magnet controlled reactor harmonic suppression apparatus |
| CN103269077A (en) * | 2013-05-29 | 2013-08-28 | 国家电网公司 | Harmonic suppression device of magnetically controlled reactor |
| CN103454519A (en) * | 2013-07-31 | 2013-12-18 | 广东电网公司电力科学研究院 | System and method for calculation/liquid crystal display of electrical parameters of active power filter |
| CN103454519B (en) * | 2013-07-31 | 2015-08-05 | 广东电网公司电力科学研究院 | The system and method for Active Power Filter-APF electrical quantity calculating/liquid crystal display |
| CN103607133A (en) * | 2013-11-29 | 2014-02-26 | 科大智能科技股份有限公司 | Three-phase bridge PWM converter and active power filter formed by same |
| CN103812121A (en) * | 2014-03-04 | 2014-05-21 | 北京富机达能电气产品股份有限公司 | High voltage intelligence compensation device |
| CN103812121B (en) * | 2014-03-04 | 2016-02-03 | 北京富机达能电气产品股份有限公司 | A kind of high-voltage intelligent compensation arrangement |
| CN104393605A (en) * | 2014-10-23 | 2015-03-04 | 哈尔滨工业大学 | Reactive continuous compensation control method for thyristor switched filter |
| CN104362631A (en) * | 2014-11-06 | 2015-02-18 | 张文景 | Control method for high-power reactive and harmonic dynamic hybrid compensation system |
| CN104362631B (en) * | 2014-11-06 | 2015-09-16 | 江苏辰午节能科技股份有限公司 | A kind of high-power idle control method with the dynamic mixing compensation system of harmonic wave |
| CN104466991A (en) * | 2014-12-24 | 2015-03-25 | 安徽天沃电气技术有限公司 | Control method for novel thyristor-fast-switched capacitor banks |
| CN104659808A (en) * | 2015-01-20 | 2015-05-27 | 东北大学 | Microgrid voltage type self-synchronizing inversion device and method with voltage perturbation estimator |
| CN105186515A (en) * | 2015-07-29 | 2015-12-23 | 山东蓝天电能科技有限公司 | Hybrid power filtering control system |
| CN105743104A (en) * | 2016-04-25 | 2016-07-06 | 哈尔滨理工大学 | Controller and control method for reactive compensation and low-order harmonic current suppression of power grid |
| CN105811419A (en) * | 2016-04-25 | 2016-07-27 | 哈尔滨理工大学 | Control method for accurately restraining power grid harmonics |
| CN105811419B (en) * | 2016-04-25 | 2018-08-21 | 哈尔滨理工大学 | A kind of accurate control method for inhibiting mains by harmonics |
| CN106685209A (en) * | 2017-02-26 | 2017-05-17 | 合肥科威尔电源系统有限公司 | Interlaced parallel bridge-less PFC circuit controller and control method therefor |
| CN109873432A (en) * | 2017-12-04 | 2019-06-11 | 逸节电子有限公司 | System for carrying out power factor and harmonic correction in power grid |
| CN110098613A (en) * | 2018-01-29 | 2019-08-06 | 东方博沃（北京）科技有限公司 | TSF reactive compensation and filtering control system |
| CN111193264A (en) * | 2019-11-08 | 2020-05-22 | 浙江晟泰电气有限公司 | Comprehensive control method for power quality control |
| CN111550913A (en) * | 2020-05-20 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Phase locking device and air conditioner |
| CN111550913B (en) * | 2020-05-20 | 2022-01-21 | 宁波奥克斯电气股份有限公司 | Phase locking device and air conditioner |
| CN115622090A (en) * | 2022-10-27 | 2023-01-17 | 伊犁职业技术学院 | Three-phase load unbalance degree treatment method and device and transformer |
| CN117674178A (en) * | 2024-01-31 | 2024-03-08 | 国网冀北电力有限公司 | Device for improving power grid environment |
| CN117674178B (en) * | 2024-01-31 | 2024-05-07 | 国网冀北电力有限公司 | Device for improving power grid environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201260080Y (en) | Device for passive compensation and harmonic wave control for intelligent electric power system | |
| CN103545812B (en) | Ultraharmonics and idle electric power compensation energy-saving device of active power grid | |
| CN103683290B (en) | A kind of parallel connection type active electric filter | |
| CN207625296U (en) | A kind of active and passive combination power load three-phase imbalance regulating device | |
| CN202004458U (en) | Active filter circuit with intelligent communication function | |
| CN101534011A (en) | Control method for distribution network active filtering quiescent reactive compensation | |
| CN202353232U (en) | High-voltage cascaded inverter power unit grid-connection feedback device | |
| CN203607849U (en) | Compensation energy-saving device of higher harmonics and reactive power for active power grid | |
| CN206697944U (en) | A kind of three-phase imbalance adjusting means | |
| CN202094634U (en) | Dynamic reactive power compensation device | |
| CN201717638U (en) | Static synchronous compensating device for power grid | |
| CN102215027A (en) | Cascade speed control device | |
| CN103117553A (en) | Novel power quality regulator on background of micro-grid | |
| CN204304441U (en) | A kind of reactive power dynamic compensation system | |
| CN202333813U (en) | Multifunctional electric energy quality regulator based on voltage type inverter | |
| CN203339701U (en) | Multi-target loss reduction device | |
| CN107528327A (en) | A kind of power network utility power quality control equipment | |
| CN202772595U (en) | Three-phase stationary power balance device | |
| CN104237670A (en) | Three-level PWM converter detection system and method | |
| CN2645316Y (en) | Digital active electric power filter | |
| CN201290007Y (en) | Energy-saving and purification device for digital electric network | |
| CN205509521U (en) | Adjusting device is synthesized to photovoltaic power generation system electric energy quality | |
| CN2831575Y (en) | Low voltage electrical network dynamic purifier | |
| CN202218020U (en) | Phase-control-type reactive power dynamic compensating device | |
| CN103414190A (en) | Multi-target loss reduction device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090617 Termination date: 20120829 |