CN101697419B - Integrated controlled system and integrated controlled method for dynamic reactive power compensation based on touch screen, PLC and DSP - Google Patents
Integrated controlled system and integrated controlled method for dynamic reactive power compensation based on touch screen, PLC and DSP Download PDFInfo
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- CN101697419B CN101697419B CN2009102089377A CN200910208937A CN101697419B CN 101697419 B CN101697419 B CN 101697419B CN 2009102089377 A CN2009102089377 A CN 2009102089377A CN 200910208937 A CN200910208937 A CN 200910208937A CN 101697419 B CN101697419 B CN 101697419B
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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
- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation 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
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- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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Abstract
The invention discloses an integrated controlled system and an integrated controlled method for dynamic reactive power compensation based on a touch screen, a PLC and a DSP. The system consists of an integrated control arithmetic unit, a TSC and an HVC. The control method comprises the following steps: firstly acquiring the voltage and current of a three-phase power grid and receiving related parameters from the touch screen; computing reactive capacity required by the system at the moment according to a instantaneous reactive power theory and utilizing the PLC to check a target power factor to obtain a most rational compensation loop combination plan; and finally utilizing thyristor cross-zero trigger technology to control a corresponding compensation loop for switching. The system and the method effectively solve the problems that the conventional compensation system cannot perform frequent switching and is low in response speed, low in compensation accuracy and the like, and greatly improve the stability of the system and reduce the running cost simultaneously.
Description
Technical field
The present invention relates to a kind of reactive compensation system and method for Comprehensive Control, particularly a kind of based on touch-screen, PLC and DSP Comprehensive Control dynamic passive compensation system and method, belong to the flexible AC transmission technical field.
Background technology
In recent years, the construction of China's electrical network and the not enough and irrational phenomenon of outfit of reactive compensation capacity that always exists in service in the useful life that this situation has caused the system voltage fluctuation, reduced electric equipment, also will absorb a large amount of reactive powers simultaneously.The appearance of reactive power not only causes generator output to descend, and reduces equipment for power transmission and distribution efficient, and has increased the net damage, has a strong impact on power supply quality and economy.Therefore,, ensure power system security, reliability service, just must formulate reasonable, effective reactive power compensation scheme electrical network in order to improve power factor, to improve the quality of power supply.
Adopt Static Type Dynamic Reactive Compensation Device SVC can play effects such as systems stabilisation voltage, improvement system imbalance, raising load power factor; Be successfully applied in the compensation of impact loads such as metallurgy, mining and electric railway at present, but also had application prospects more.Be characterized in: governing speed is fast, can be continuously, phase-splitting carry out reactive power regulate, reliable, applied widely etc., therefore to power system voltage stabilization with improve the quality of power supply and played tangible effect.It mainly contains two kinds of forms: a kind of is thyristor-controlled reactor TCR, and another kind is thyristor switchable capacitor TSC.TCR is through changing thyristor conducting angle, coming control flows to cross the reactive current size of reactor, thereby control reactive power.Though it has quick inhibition voltage fluctuation, the permission of control load or burden without work that can be level and smooth fluctuation, advantages such as steady load; But because thyristor and reactor are under the same phase voltage, voltage is high, power is big, floor space is big, the cooling of thyristor valve group is strict, price is high, exerts oneself though TCR can adjust continuously; But waveform indention; Be a very big harmonic source, but also must move simultaneously, so in some operating mode, limited its development with FC.TSC is the conducting and the switching that turn-offs the control capacitance device through thyristor, thereby changes size from reactive power to system that send, uses series reactor can effectively suppress to shove and superpotential generation simultaneously.Though it is adjustable continuously that TSC can not look like TCR, can put in place by a step switching, can not produce harmonic wave; Take up an area of and lack, reliability is high, and wave distortion is little; Safeguard that simply in addition, the control of TSC is relatively simple; Response speed is also than comparatively fast, and cost is more cheap under equal capacity in addition, has been widely used in the power back-off field at present.Because the circuit of most of industrial and mining enterprises or load are rendered as perception mostly, need capacitive reactive power, be again simultaneously to ensure that the idle and power factor on the production line is a main purpose; From considering to adopt HVC (mechanical switched capacitor) to compensate mostly economically; Though HVC also can grading automatical regulation voltage, idle, the compensation power factor, its maximum shortcoming is to carry out frequent switching; Response speed is slow, is prone to cause benefit etc.
Summary of the invention
In order to address the above problem; The present invention aims to provide a kind of based on touch-screen, PLC and DSP Comprehensive Control dynamic passive compensation system and method; Compensating reactive power again can be so that cordwood system type, modular construction satisfy the idle occasion of various big capacity more flexibly fast and effectively; At utmost to reduce grid loss, equipment input and operating cost, in the useful life of improving equipment simultaneously, reduce maintenance times.
For achieving the above object; It is a kind of based on touch-screen, PLC and DSP Comprehensive Control dynamic passive compensation system and method that the present invention provides; A kind of touch-screen, PLC and DSP Comprehensive Control dynamic passive compensation system are made up of comprehensive control and calculation unit, TSC and HVC, it is characterized in that the HVC compensation circuit is connected with electrical network in contiguous load-side; And be connected in parallel on the electrical network through filter reactor, vacuum contactor, it is idle to compensate big capacity; The TSC compensation circuit is connected in parallel on the electrical network through filter reactor, thyristor valve group, carries out idle fine tuning.Wherein, described comprehensive control and calculation unit is made up of touch-screen, PLC and DSP arithmetic element, trigger impulse, protection system.Described protection system forms circuit, photoelectric isolating circuit, zero cross fired system, fault detection system by touch-screen, PLC and DSP arithmetic element, trigger impulse and forms.Described HVC is made up of fixed capacitor, filter reactor, circuit breaker or vacuum contactor, relay control.Described TSC is made up of Shunt Capacitor Unit, filter reactor, thyristor valve group, zero cross fired system.
Control method based on above-mentioned dynamic passive compensation system may further comprise the steps:
(1) the A/D acquisition system is gathered electrical network three-phase voltage, current instantaneous value in real time.
(2) way of TSC and HVC and compensation capacity, the target power factor of respective branch, system parameterss such as voltage, electric current, harmonic wave warning limit value are set in touch-screen.
(3) the DSP arithmetic element utilizes the instantaneous reactive theory to calculate voltage, the current signal that the sampling of A/D acquisition system obtains; Obtain the meritorious and reactive current of first-harmonic; Calculate the needed reactive capability of load according to the target power factor value again; Determine which or the multichannel TSC input that combines with HVC then, realize that OPTIMAL REACTIVE POWER regulates.
(4) trigger impulse forms circuit and gives the zero cross fired system with the pulse triggering signal of each branch road TSC; The zero cross fired system judges that system drops into the capacitor group constantly in zero passage; Can make no-flashy-flow impact in the capacitor switching process, the HVC by PLC control respective branch carries out switching simultaneously.
(5) when confirming reactive capability and possessing the switching condition; PLC also will carry out the power factor verification, and promptly comparison object power factor and actual power factor so just can be accomplished the quick response that compensates; Avoided the miscarrying of capacitor to go into again; Make the capacitor switching one-time-reach-place, effectively prevented the capacitor switching vibration, reach good compensation effect.
(6) protection system is monitored the working condition and the running status in TSC loop in real time; And all service datas of TSC are passed to the single-chip microcomputer processing unit through the CAN bus, the single-chip microcomputer processing unit is sent into the DSP arithmetic element with these operation informations through dual port RAM again and is handled accordingly.Protection system can also be sent block signal and gives output unit to block TSC switching signal when catastrophe failure appears in the TSC loop, has ensured safety, the reliability service in TSC loop.
Comprehensive Control reactive compensation system of the present invention and method, wherein the way of TSC and HVC can be provided with arbitrarily in principle, is configured to the filter branch of characteristic harmonics usually according to on-site actual situations.Complex control system forms circuit, photoelectric isolating circuit, zero cross fired system, PLC and touch-screen etc. by signal input and output, signal processing, DSP arithmetic element, trigger impulse and forms.
The invention has the beneficial effects as follows:
(1) comprehensive reactive compensation control system constitutes the associating collocation structure by TSC and HVC, carry out the idle coarse adjustment of big capacity by HVC, and TSC carries out idle fine tuning, has realized big capacity, idle quick adjustment system cheaply.
(2) can dispose the requirement that different compensating units satisfies compensation capacity and compensation precision according to field working conditions.Modular construction, bus clip capable of using overlaps arbitrarily between the unit, installs, expands easily, and is simple and convenient.
(3) complex control system is guaranteed the thyristor zero cross fired, makes switched capacitor not have impact, no-flashy-flow, no transient process.Both dynamically fast follow load changed, and had overcome traditional reactive-load compensator again to harm that capacitor produced.
(4) can realize the networking of equipment on the spot through the remote operation interface; Combine with the real-time power network data again, use Reactive Power Optimization Algorithm for Tower, obtain the control command of each equipment; Can carry out straighforward operation to each equipment respectively; Monitor the fault message of each equipment and system simultaneously, and report to the police or excise fault loop, improved system reliability according to fault level.
(5) use instantaneous reactive power theory and replace traditional in the past control theory; Be exactly to utilize instantaneous value to replace traditional effective value to analyze three-phase electrical power system in essence; Combine touch-screen and PLC to carry out analysis-by-synthesis again, quick, the accurate switching of final control compensation equipment.Characteristics such as this method has that real-time is good, precision is high, theoretical maturation and clear concept are fit to very that the current power system harmonics detects and the adaptability of reactive power compensation, the requirement of accuracy, are a kind of very promising theory and control method.
The present invention also has some technical characterictics like this: described dsp chip is a new generation of TI company chip, and its data-bus width is 32, and address-bus width is 24, and speed rises to 150M, has abundant peripheral hardware simultaneously.And the dual port RAM employing is the development of CYPRESS company; This chip is to have two at a high speed to overlap address bus, data/address bus and control bus separate, complete symmetry; Be 2K * 16CMOS dual-port static RAM, adopt 68 pin PLCC packing forms, the maximum access time can be 25/35/55ns.The A/D Acquisition Circuit is AD7864, is one 4 passage, 12 high-speed a/d converters.Described another single chip circuit is AT90CAN128; Be a 8 single-chip microcomputers of Atmel company; Inside has 10 high-speed a/d converters of the single-ended or difference input of one 8 passage, and has 1 CAN control unit interface that meets 2.0A or 2.0B, is a high-performance single-chip microcomputer.PLC Siemens Company produces, and this series of PLC is with its ultra-small volume, configuration flexibly, and powerful build-in function is applied in the automated system of monitoring and control in the every profession and trade for many years always.Touch-screen adopts a embedded integrated industrial computer of MCGS; It has disposed high brightness TFT LCDs; Four-wire resistance type touch screen (resolution 4096 * 4096); Also having pre-installed embedded real-time multi-task operating system WinCE.NET of Microsoft (Chinese edition) and the embedded configuration software of MCGS simultaneously, is the high man-machine interface of a cost performance.
Description of drawings
Fig. 1 is a Comprehensive Control reactive compensation system structural representation;
Fig. 2 is the control block diagram of Comprehensive Control reactive compensation system;
Fig. 3 is a DSP computing block diagram;
Fig. 4 is the DSP algorithm flow chart.
Embodiment
Specific embodiment one:
1～4 couple of the present invention further specifies in conjunction with accompanying drawing: the Comprehensive Control reactive compensation system of one road TSC and two-way HVC, wherein TSC compensation circuit, HVC compensation circuit are connected with electrical network in contiguous load-side.The HVC compensation circuit is connected in parallel on the electrical network through filter reactor, vacuum contactor, and it is idle to compensate big capacity.The TSC compensation circuit is connected in parallel on the electrical network through filter reactor, thyristor valve group, carries out idle fine tuning.The Comprehensive Control protection system forms circuit, photoelectric isolating circuit, zero cross fired system, fault detection system by touch-screen, PLC and DSP arithmetic element, trigger impulse and forms.When system needs capacitive reactive power; The DSP arithmetic element calculates required reactive capability, control HVC loop switching, and when system's zero passage, trigger thyristor; Drop into the TSC compensation circuit; The TSC compensation circuit has remedied the shortcoming that the HVC compensation circuit can not carry out quick adjustment, can provide larger capacity idle advantage in conjunction with the HVC compensation circuit, thereby has realized big capacity, idle quick adjustment cheaply.
Shown in Figure 2 is the control block diagram of Comprehensive Control reactive compensation system, and it comprises signal collection modulation module, single-chip microcomputer and DSP calculation process module, output unit, protected location, zero cross fired system, PLC and touch-screen.
The signal collection modulation module is responsible for gathering three-phase voltage, current signal; And, again transformation result is sent into the DSP arithmetic element, meanwhile with sending into A/D converter conversion after the signal process isolated amplifier isolation that collects; Operating personnel can be provided with way, capacity numerical value and the target power factor etc. of TSC and HVC compensation circuit respectively on touch-screen; Also passed to the DSP arithmetic element when all parameter settings finish down, the DSP arithmetic element calculates the instantaneous reactive power of current electrical network according to electrical network parameter, combines setting parameter under the touch-screen again; Which or multichannel TSC and HVC compensation circuit decision drop into; And the switching control signal sent into output unit, output unit comprises that trigger impulse forms circuit and photoelectric isolating circuit, forms circuit generation high-frequency impulse by trigger impulse; After photoelectric isolating circuit carries out the electric light conversion, be conveyed in the zero passage triggering system again through optical fiber.The zero passage detection technology is the important technical links in the TSC bucking-out system, is the good and bad key factor of decision TSC bucking-out system performance.In general, the generation of shoving when avoiding capacitor to drop into when selecting switching constantly, should guarantee that supply voltage is identical with capacitor residual voltage amplitude and direction, and the residual voltage of capacitor often is difficult for being detected, so select voltage over zero as the input moment.At this moment, thyristor voltage and supply voltage are zero, can avoid shoving, and guarantee the steady conducting of thyristor.Zero cross fired of the present invention system is exactly according to above-mentioned principle, decides the moment of dropping into the capacitor group and sends trigger impulse through the zero crossing that detects the thyristor voltage.Trigger impulse adopts the electromagnetism triggering mode, and promptly the signal of circuits for triggering transmits through pulse isolation transformer, has realized that primary system and electrical secondary system isolate fully; And can carry out triggering and conducting, shutoff simultaneously to the dozens of thyristor simultaneously, consistency is high, has very high reliability and fail safe simultaneously; Reach advanced world standards; Both avoided system is impacted, can also as early as possible capacitor have been put in the system, improved the response speed of TSC.In addition, the zero cross fired system stops to send trigger impulse when receiving the excision order, and thyristor automatic disconnection when current over-zero just can drop at voltage over zero when have triggering signal next time more constantly again.The switching of HVC compensation circuit then is to rely on the PLC system that it is controlled, and PLC carries out the switching operation to corresponding HVC compensation circuit after the switching instruction of receiving the DSP arithmetic element; Simultaneously, also to target power factor and actual power factor be compared, combine total compensation capacity again; Confirm a kind of near the compound mode of only mending again; Switching of capacitor group is put in place, solved the problem of throw in-of oscillation, improved the response speed of compensation again.The operating state of major loop and failure condition can be passed PLC back, are handled accordingly by PLC, and the while PLC state information that HVC is all is real-time transmitted to touch-screen and shows that touch-screen also possesses the function of manual switching HVC, has made things convenient for on-the-spot debugging.The TSC compensation circuit has special protected location, has warnings such as overvoltage, overcurrent, overtemperature, controllable silicon fault, capacitor fault, simultaneously the operating state of switch element is monitored in real time, is judged.In case 5 above faults take place the thyristor element in the series thyristor valve group, protective circuit control output unit blocks trigger impulse at once, makes three-phase thyristor valve group stop conducting, prevents that other element is damaged.In addition; Protected location also will be passed to the single-chip microcomputer processing unit through the CAN bus with operation information, the alarm condition of three-phase thyristor valve group; After the CPU conversion process; Send all these TSC compensation circuit information to DSP through dual port RAM again, carry out Unified Treatment by DSP, DSP sends these system informations to touch-screen by serial ports and shows, stores subsequently.Touch-screen has distant place communication function, can carry out telecommunication with host computer, carries out unified management by host computer, and each local device of straighforward operation, register system ruuning situation are for each equipment operate as normal provides strong guarantee.
Fig. 3, shown in Figure 4 be DSP computing block diagram and DSP algorithm flow chart, adopt the DSP arithmetic element of TMS320F2812 type, be programming language with the C language, realized the quick computing and the compensation of reactive power based on the instantaneous reactive theory.
At first the three-phase voltage that collects, three-phase current signal are analyzed to the coordinate system of alpha-beta two phase quadratures by a, b, c three-phase coordinate axis transform; And then through the d-q coordinate axis transform; Become the rotating coordinate system parameter; Harmonic component is filtered out, and obtain real-time reactive power through the algorithm of computing module.Suppose that electrical network three-phase voltage, three-phase current instantaneous value are respectively u
a, u
b, u
cAnd i
a, i
b, i
c, wherein instantaneous voltage can be expressed as:
In the following formula, U
mBe voltage magnitude, ω is an angular frequency.The instantaneous reactive power of three phase network is exactly the mould of voltage vector and the product of three phase network instantaneous reactive component so, can be expressed as:
Can derive another formula by above two formulas:
q＝-U
m[i
acosωt+i
bcos(ωt-2π/3)+i
ccos(ωt+2π/3)]
Hence one can see that; As long as gather system voltage, the current value in a certain moment; Just can calculate active power and reactive power fast,, can in a cycle, gather the multiple spot data and calculate meritorious and reactive power simultaneously for fear of some interference at scene; Again result of calculation is averaged, to improve computational accuracy.
The DSP arithmetic element receives the way and the capacity of the compensation circuit that is provided with by touch-screen simultaneously, and the reactive power that coupling system is current obtains best switching compound mode and controls corresponding branch road and carry out the switching operation.
The present invention has accomplished the production of model machine and has put evidence, difficult problems such as the compensation arrangement response speed was slow in the past, computational accuracy is low, complex structure that it has solved effectively into operation.Have characteristics such as response is fast, precision is high, easy to operate, low-cost, safe and reliable to operation.
Above execution mode only supplies to explain the present invention's usefulness; But not limitation of the present invention; Those skilled in the art; Under situation without departing from the spirit or scope of the invention, the technical scheme of making various equivalents or variation belongs to protection category of the present invention, is limited by each item claim.
Claims (3)
1. Comprehensive Control dynamic passive compensation system based on touch-screen, PLC and DSP; Form by comprehensive control and calculation unit, TSC (thyristor switchable capacitor) and HVC (mechanical switched capacitor); It is characterized in that: the HVC compensation circuit is connected with electrical network in contiguous load-side, and is connected in parallel on the electrical network through filter reactor, vacuum contactor; The TSC compensation circuit is connected in parallel on the electrical network through filter reactor, thyristor valve group; Described comprehensive control and calculation unit comprises signal collection modulation module, single-chip microcomputer processing unit, DSP arithmetic element, output unit, protected location, zero cross fired system, PLC and touch-screen; The signal collection modulation module is responsible for gathering three-phase voltage, current signal; And, again transformation result is sent into the DSP arithmetic element, meanwhile with sending into A/D converter conversion after the signal process isolated amplifier isolation that collects; Operating personnel can be provided with way, capacity numerical value and the target power factor of TSC and HVC compensation circuit respectively on touch-screen; Also pass to the DSP arithmetic element when all parameter settings finish down, the DSP arithmetic element calculates the instantaneous reactive power of current electrical network according to electrical network parameter, combines setting parameter under the touch-screen again; Which or multichannel TSC and HVC compensation circuit decision drop into; And the switching control signal sent into output unit, output unit comprises that trigger impulse forms circuit and photoelectric isolating circuit, forms circuit generation high-frequency impulse by trigger impulse; After photoelectric isolating circuit carries out the electric light conversion, be sent in the zero cross fired system again through optical fiber; The switching of HVC compensation circuit then is to rely on PLC that it is controlled; PLC carries out the switching operation to corresponding HVC compensation circuit, simultaneously after the switching instruction of receiving the DSP arithmetic element; Also to target power factor and actual power factor be compared; Combine total compensation capacity again, confirm the most approaching a kind of compound mode of only mending again, switching of capacitor group is put in place; The operating state of HVC compensation circuit and failure condition can be passed PLC back, are handled accordingly by PLC, and the while PLC state information that HVC is all is real-time transmitted to touch-screen and shows that touch-screen also possesses the function of manual switching HVC; The TSC compensation circuit has special protected location; Have overvoltage, overcurrent, overtemperature, controllable silicon fault, capacitor fault alarm; Simultaneously the operating state of switch element is monitored in real time, is judged that in case 5 above faults take place the thyristor element in the series thyristor valve group, protected location control output unit blocks trigger impulse at once; Make three-phase thyristor valve group stop conducting, prevent that other element is damaged; Protected location also will be passed to the single-chip microcomputer processing unit through the CAN bus with operation information, the alarm condition of three-phase thyristor valve group; After the CPU conversion process, send all these TSC compensation circuit information to the DSP arithmetic element through dual port RAM again, carry out Unified Treatment by the DSP arithmetic element; The DSP arithmetic element sends these system informations to touch-screen by serial ports and shows, stores subsequently; Touch-screen has distant place communication function, can carry out telecommunication with host computer, carries out unified management by host computer; Each local device of straighforward operation, register system ruuning situation are for each equipment operate as normal provides strong guarantee.
2. the method for a kind of Comprehensive Control dynamic passive compensation system based on touch-screen, PLC and DSP according to claim 1 is characterized in that may further comprise the steps:
(1) the signal collection modulation module is gathered electrical network three-phase voltage, current instantaneous value in real time;
(2) compensation capacity, target power factor, the voltage of compensation circuit number and the corresponding compensation circuit of TSC and HVC, the system parameters of electric current harmonic warning limit value are set in touch-screen;
(3) DSP arithmetic element voltage, current signal that the signal collection modulation module samples is obtained utilizes the instantaneous reactive theory to calculate; Obtain the meritorious and reactive current of first-harmonic; Calculate the needed reactive capability of load according to the target power factor value again; Determine which or the multichannel TSC input that combines with HVC, realize that OPTIMAL REACTIVE POWER regulates;
(4) trigger impulse forms circuit and gives the zero cross fired system with the pulse triggering signal of each branch road TSC; The zero cross fired system judges that system drops into the capacitor group constantly in zero passage; Can make no-flashy-flow impact in the capacitor switching process, the HVC by PLC control respective branch carries out switching simultaneously;
(5) when confirming reactive capability and possessing the switching condition, PLC also will carry out power factor verification, i.e. comparison object power factor and actual power factor;
(6) protected location is monitored the working condition and the running status in TSC loop in real time; And all service datas of TSC are passed to the single-chip microcomputer processing unit through the CAN bus, the single-chip microcomputer processing unit is sent into the DSP arithmetic element with these operation informations through dual port RAM again and is handled accordingly; Protected location can also send block signal and gives output unit to block TSC switching signal when catastrophe failure appears in the TSC loop.
3. the method for a kind of Comprehensive Control dynamic passive compensation system based on touch-screen, PLC and DSP according to claim 2; It is characterized in that the three-phase voltage, the three-phase current signal that collect analyzed to the coordinate system of alpha-beta two phase quadratures by a, b, c three-phase coordinate axis transform; And then through the d-q coordinate axis transform; Become the rotating coordinate system parameter; Harmonic component is filtered out, and obtain real-time reactive power, suppose that electrical network three-phase voltage, three-phase current instantaneous value are respectively u through the algorithm of computing module in the DSP arithmetic element
a, u
b, u
cAnd i
a, i
b, i
c, wherein instantaneous voltage can be expressed as:
In the following formula, U
mBe voltage magnitude, ω is an angular frequency, and the instantaneous reactive power of three phase network can be expressed as so:
Can derive another formula by above two formulas:
q＝-U
m[i
acosωt+i
bcos(ωt-2π/3)+i
ccos(ωt+2π/3)]
Just can calculate reactive power fast thus.
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| CN112421080B (en) * | 2020-11-18 | 2021-09-03 | 上海恒劲动力科技有限公司 | Power control system of proton exchange membrane fuel cell |
| CN115051379B (en) * | 2022-08-17 | 2023-03-24 | 山东国信电力科技有限公司 | Reactive compensation system and compensation method for power distribution network |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7091703B2 (en) * | 2004-03-04 | 2006-08-15 | American Superconductor Corporation | Dynamic reactive compensation system and method |
| CN101247046A (en) * | 2007-12-19 | 2008-08-20 | 湖南大学 | Harmonic wave dynamic managing and reactive-load dynamic compensation compound control method and implementing device thereof |
| CN201163722Y (en) * | 2008-01-11 | 2008-12-10 | 上海中交水运设计研究有限公司 | Reactive compensator for harbor electric power supply system |
| CN201247959Y (en) * | 2008-08-25 | 2009-05-27 | 西安森宝电气工程有限公司 | Stillness type high voltage reactive compensator of control transformer based on thyristor |
-
2009
- 2009-10-29 CN CN2009102089377A patent/CN101697419B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7091703B2 (en) * | 2004-03-04 | 2006-08-15 | American Superconductor Corporation | Dynamic reactive compensation system and method |
| CN101247046A (en) * | 2007-12-19 | 2008-08-20 | 湖南大学 | Harmonic wave dynamic managing and reactive-load dynamic compensation compound control method and implementing device thereof |
| CN201163722Y (en) * | 2008-01-11 | 2008-12-10 | 上海中交水运设计研究有限公司 | Reactive compensator for harbor electric power supply system |
| CN201247959Y (en) * | 2008-08-25 | 2009-05-27 | 西安森宝电气工程有限公司 | Stillness type high voltage reactive compensator of control transformer based on thyristor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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