CN101291066B - Combining apparatus of passive filtering and active reactive-load compensator - Google Patents
Combining apparatus of passive filtering and active reactive-load compensator Download PDFInfo
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- CN101291066B CN101291066B CN2007100395896A CN200710039589A CN101291066B CN 101291066 B CN101291066 B CN 101291066B CN 2007100395896 A CN2007100395896 A CN 2007100395896A CN 200710039589 A CN200710039589 A CN 200710039589A CN 101291066 B CN101291066 B CN 101291066B
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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
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention discloses a passive filtering and active reactive-power compensator combination device, comprising a passive reactive-power compensation part and an active reactive-power compensation part. The passive reactive-power compensation part consists of a plurality of passive reactive-power compensation modules with the same structure; the passive reactive-power compensation modules are connected with a compensation electric grid by a contactor; all passive reactive-power compensation modules have the same structure and capacity; the active reactive-power compensator and a passive filtering module are same in capacity. When the reactive power needing to be compensated by the system is detected to be lower than the residual capacity of the active reactive-power compensator, the active reactive-power compensation module compensates the reactive-power capacity needed; when the reactive power to be compensated for actual operation of the system is more than the residual capacity of the active reactive-power compensator, the reactive power needed is compensated by automatically connecting or disconnecting the passive reactive-power modules. The passive filtering and active reactive-power compensator combination device has the advantages of lowering the capacity of the active reactive-power compensator and system cost and ensuring filtering effect of the system, so that the device can be applied to the harmonic filtering and the reactive-power compensation in a power supply system.
Description
Technical field
The present invention relates to a kind of harmonic and reactive power compensator that is used for electric power system, be meant the mixing arrangement of passive filtering and active reactive-load compensator especially.
Background technology
The mixing arrangement of passive filtering and active reactive-load compensator can inject the continuously adjustable leading or reactive power that lags behind to electrical network.The circuit structure of existing mixing arrangement generally has two kinds, circuit structure shown in Figure 1 is first kind: suppose that the compensable idle total capacity of this Circuits System is Q, passive filtering partly comprises three branch roads, be respectively 5 single tuning branch roads, 7 single tuning branch roads and 11 high pass branch roads, the total capacity of passive part is Q/2, and the capacity of three branch roads can equate also can not wait according to the requirement of real system; The total capacity of the capacity of active reactive-load compensator 20 and passive filtering part equates, also is Q/2; When system moves, 5,7,11 branch roads drop into simultaneously, can compensate the reactive power of Q/2, filtering 5,7,11 times simultaneously and other high order harmonic components, leading or the reactive power that lags behind of the Continuous Compensation as a result that active reactive-load compensator 20 detects in real time according to system, cooperate with passive leg, realize the continuous reactive compensation between the capacity 0-Q.The shortcoming of this structure is:
1. the capacity of active reactive-load compensator equates with the total capacity of passive filtering part, when system requirements compensation idle very big, corresponding overall system capacity is very big, cause the active part capacity very big, cost height (cost of the active reactive-load compensator of same capability generally is more than 5 times of passive filtering part), efficient is low simultaneously, has caused the disposable input cost of whole system very high.
2. not having switching during owing to the operation of passive filtering part system handles, that is to say that the passive filtering part is fixing the input when moving in system, when not needing compensating power in the system outside like this, active reactive-load compensator will send idle in advance, compensate the idle in advance of passive filtering part, cause the active part oepration at full load, loss is big.
The circuit structure of the mixing arrangement of second kind of passive filtering commonly used and active reactive-load compensator is seen shown in Figure 2, its circuit structure is identical with above-mentioned circuit structure, but the operational mode difference of system, the capacity allocation of passive part and active part is also different with said structure.The idle total capacity that supposing the system can compensate is Q, and the capacity of three branch roads of passive part and the capacity of active compensation device 20 are an equal quantities, i.e. Q
Active=Q
5=Q
7=Q
11=Q/4, the capacity of active part only is 1/4 of an overall system capacity like this, than first kind of structure decrease half, the corresponding reduction of cost, loss simultaneously reduces.When but this structure is moved in system, it is size according to the reactive power that detects, difference is 5,7,11 branch roads of switching passive filtering successively: the order that promptly drops into passive part is to drop into 5 branch roads earlier, drop into again 7 times, be 11 times then, when excision, excision earlier 11 times, excise again 7 times, excise branch road at last 5 times, so system is during if not oepration at full load, the passive filtering part only can be divided branch road by throw-in part, like this can only the filtering fractional harmonic, cause the filter effect of system bad, and the easy Harmonic overloading of filter branch.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of filter effect that can guarantee Circuits System, lowers the passive filtering and the active reactive-load compensator composite set of system's manufacturing cost, operation and maintenance cost simultaneously.
For solving the problems of the technologies described above, passive filtering of the present invention and active reactive-load compensator composite set are made up of n+1 bar branch road, comprise Passive Reactive Power Compensation part and active reactive power compensation part: Passive Reactive Power Compensation partly is made up of n (n〉1) the Passive Reactive Power Compensation module that individual structure is identical, each Passive Reactive Power Compensation module links to each other with compensation network by a contactor, the Passive Reactive Power Compensation module is made up of the passive filtering branch road, and the structure of each Passive Reactive Power Compensation module is identical and capacity equal; Active reactive power compensation partly comprises an active reactive-load compensator, and the capacity of this active reactive-load compensator equates with the capacity of a Passive Reactive Power Compensation module; When the system that detects wants compensating power less than the residual capacity of active reactive-load compensator, system utilizes active reactive-load compensator to regulate and compensates required reactive capability, the reactive power that will compensate when system's actual motion is during greater than the residual capacity of active reactive-load compensator, and system utilizes contactor to drop into (during hysteresis) or excision when leading () Passive Reactive Power Compensation module automatically and compensates the reactive power of actual needs compensation.
Passive filtering of the present invention and active reactive-load compensator composite set as long as utilize 1 active reactive-load compensator and switching n Passive Reactive Power Compensation module successively, just can be implemented in-Q/ change between (n+1)～Q idle and carry out continuously dynamic compensated regulation.Compare with first kind of structure of the prior art, because the capacity of active reactive-load compensator of the present invention only is 1/ (1+n) of overall system capacity, n wherein〉1, so effectively lowered the capacity of active reactive-load compensator, more than 5 times of passive filtering part price that are about equal capacity because of the price of active reactive-load compensator, so manufacturing cost reduces, and because the capacity of active reactive-load compensator reduces, make the control of compensator simpler, system reliability is higher, further reduces the operation maintenance cost of system.Compare with second kind of structure of the prior art, passive filtering of the present invention and active reactive-load compensator composite set, guard system is not in a still throw-in part sub-module operation of oepration at full load, in the Passive Reactive Power Compensation module that drops into, single tuning and high-pass filtering branch road are worked simultaneously, so the harmonic of system is effective, and along with the increase of reactive capability, the Passive Reactive Power Compensation module that drops into also increases, and therefore the situation of module overload can not take place.In addition because the efficient of active reactive power compensation is low than the efficient of Passive Reactive Power Compensation, the present invention system need not be idle situation under, can excise all branch roads, so the operation cost of system and loss reduce at double also.In sum, passive filtering of the present invention and active reactive-load compensator composite set have satisfied low cost and the high performance requirement to installing in the practical application preferably.
Description of drawings
The present invention is further detailed explanation below in conjunction with accompanying drawing and embodiment:
Fig. 1 is the disposable switching circuit theory of a passive filtering schematic diagram in the prior art;
Fig. 2 divides single branch road switching circuit theory schematic diagram for passive filtering branch road in the prior art;
Fig. 3 is passive filtering of the present invention and active reactive-load compensator composite set circuit theory schematic diagram.
Embodiment
Passive filtering of the present invention and active reactive-load compensator composite set structure are made up of n+1 (n〉1) bar branch road, can be divided into two parts, be respectively Passive Reactive Power Compensation part and active reactive power compensation part, Fig. 3 has provided passive filtering of the present invention and active reactive-load compensator composite set circuit structure schematic diagram.The Passive Reactive Power Compensation part is made up of n the identical Passive Reactive Power Compensation module 10 of structure, Passive Reactive Power Compensation module 10 is made up of the passive filtering branch road, have two kinds of functions of reactive power compensation and filtering during operation, each passive merit compensating module 10 links to each other with compensation network by a contactor Ki, and the structure of each Passive Reactive Power Compensation module is identical and capacity equal.Passive filtering branch road in the Passive Reactive Power Compensation module 10 can design according to the needs of real system, is designed to 5 single tuning filter branch, 7 single tuning filter branch and 11 high pass harmonic branch roads in this specific embodiment and constitutes a Passive Reactive Power Compensation module 10.The switching of Passive Reactive Power Compensation module 10 is by contactor K
i(i=1,2 ...) finish.Active reactive power compensation partly has an active reactive-load compensator 20, and the capacity of active reactive-load compensator 20 equates that with the capacity of a Passive Reactive Power Compensation module 10 operation of active reactive-load compensator 20 is finished by its inner controller.
The specific design method of each branch road capacity is as follows in passive filtering of the present invention and the active reactive-load compensator composite set:
The first step is determined the capacity and the number n of Passive Reactive Power Compensation module 10 according to the maximum reactive capability of system needs compensation.To need to determine the maximum reactive capability Qmax that compensates according to the actual conditions of device work, determine the total capacity Q of this device then according to Qmax, be Q=Qmax, determine passive merit compensating module number n according to the value of Qmax again, the capacity of corresponding each Passive Reactive Power Compensation module 10 is Q/ (n+1), the capacity of active reactive-load compensator 20 also is Q/ (n+1), wherein the number of n need be optimized selection according to the capacity of overall system capacity and active reactive-load compensator 20, principle is under the less relatively situation of the capacity that makes active reactive-load compensator 20, what the number of Passive Reactive Power Compensation module 10 was tried one's best lacks, make the cost of whole system lower like this, can too much not make system configuration and control too complicated again because of the Passive Reactive Power Compensation module;
Second step, form the filter branch type of Passive Reactive Power Compensation module 10 according to the specific requirement of real system design, distribute the capacity of each filter branch again according to capacity Q/ (n+1) design of Passive Reactive Power Compensation module.The design of above-mentioned Passive Reactive Power Compensation modular structure can change according to the requirement of real system, for example the filter branch in the Passive Reactive Power Compensation module can be designed to the composition form by single tuning filter branch and second order high-pass filtering branch road, perhaps can be designed to double-tuned branch road, also can be according to the special special filter branch of filtering requirements design.The amount of capacity of each filter branch need be distributed according to the characteristics of real system work.Consist of example with Passive Reactive Power Compensation module 10 by 5 single tunings, 7 single tunings and 3 filter branch of 11 high passes, can be designed to 5 single tunings, 7 single tunings and 11 high-pass filtering branch road capacity all equates, the capacity that is each branch road is 1/3 of Q/ (n+1), also can be designed to 5 single tunings, 7 single tuning branch road capacity equate, the capacity of 11 high-pass filtering branch roads is 5 single tunings, 7 single tuning branch road capacity 2 times or 3 times, and the total capacity of 3 branch roads is Q/ (n+1);
The 3rd step, distribute the capacity of each branch road after, design the filtering parameter (filter capacitor C, filter inductance L, filter resistance R) of 5 single tunings, 7 single tunings, 11 high-pass filtering branch roads more respectively, make system that filter effect preferably be arranged.
The course of work of passive filtering of the present invention and active reactive-load compensator composite set is: the system of detecting will compensate idlely is q, as q during less than the residual capacity of active reactive-load compensator 20, compensate desired reactive capability by active reactive-load compensator 20, as q during greater than the residual capacity of active reactive-load compensator 20, by contactor input (during hysteresis) or excision (leading time) Passive Reactive Power Compensation module, the continuous reactive compensated regulation between realization-Q/ (n+1)～Q; Do not need when idle in system, all Passive Reactive Power Compensation modules and active reactive-load compensator complete resection, reactive power compensation is output as 0.In addition, the Passive Reactive Power Compensation module 10 that drops into when compensation network is regulated comprises 5 single tunings, 7 single tunings and 11 high pass branch roads all the time, has effectively guaranteed filter effect.
Claims (5)
1. passive filtering and active reactive-load compensator composite set comprise Passive Reactive Power Compensation part and active reactive power compensation part, it is characterized in that:
Described Passive Reactive Power Compensation part is made up of the identical Passive Reactive Power Compensation module of a plurality of structures, each Passive Reactive Power Compensation module links to each other with compensation network by a contactor, described Passive Reactive Power Compensation module is made up of the passive filtering branch road, and the structure of each Passive Reactive Power Compensation module is identical and capacity equal;
Described active reactive power compensation partly comprises an active reactive-load compensator, and the capacity of described active reactive-load compensator equates with the capacity of a described Passive Reactive Power Compensation module;
The reactive power that will compensate when the system of detecting is during less than the residual capacity of active reactive-load compensator, system utilizes active reactive-load compensator to regulate and compensates needed reactive power, the reactive power that will compensate when system's actual motion is during greater than the residual capacity of active reactive-load compensator, and system drops into or excise the reactive power that the Passive Reactive Power Compensation module compensates the actual needs compensation automatically.
2. according to described passive filtering of claim 1 and active reactive-load compensator composite set, it is characterized in that: described Passive Reactive Power Compensation module is made up of single tuning filter branch and second order high-pass filtering branch road.
3. according to described passive filtering of claim 2 and active reactive-load compensator composite set, it is characterized in that: described Passive Reactive Power Compensation module is made up of 5 single tunings, 7 single tunings and 3 filter branch of 11 high passes, and the capacity of described three branch roads equates.
4. according to described passive filtering of claim 2 and active reactive-load compensator composite set, it is characterized in that: described Passive Reactive Power Compensation module is made up of 5 single tunings, 7 single tunings and 3 filter branch of 11 high passes, and the capacity of described three branch roads is unequal.
5. according to described passive filtering of claim 1 and active reactive-load compensator composite set, it is characterized in that: described Passive Reactive Power Compensation module is made up of the double tunning filter branch.
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| CN2007100395896A CN101291066B (en) | 2007-04-18 | 2007-04-18 | Combining apparatus of passive filtering and active reactive-load compensator |
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| CN2007100395896A CN101291066B (en) | 2007-04-18 | 2007-04-18 | Combining apparatus of passive filtering and active reactive-load compensator |
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| CN101291066B true CN101291066B (en) | 2011-07-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924370B (en) * | 2010-09-08 | 2013-01-23 | 株洲变流技术国家工程研究中心有限公司 | Mixed type power quality controlling device |
| CN102957155A (en) * | 2012-11-05 | 2013-03-06 | 如皋市图腾电力科技有限公司 | Control method for realizing reactive power compensation and harmonic suppression |
| CN105552930A (en) * | 2016-03-15 | 2016-05-04 | 河南隆鑫电力设备有限公司 | Distribution transform reactive compensation method and device |
| CN106412953B (en) * | 2016-09-28 | 2019-11-15 | 北京中科国技信息系统有限公司 | Multiple probe technique test macro and its calibration method and device |
| CN106786584A (en) * | 2016-12-29 | 2017-05-31 | 江苏越达电力设备有限公司 | A kind of low pressure passive filtration unit based on resonance theory |
| CN110994634B (en) * | 2019-12-04 | 2023-02-10 | 东莞市骏通建设工程有限公司 | Energy-saving control method of modular active reactive compensation module |
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