CN204696697U - With the power-factor compensator of safety detecting system - Google Patents
With the power-factor compensator of safety detecting system Download PDFInfo
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- CN204696697U CN204696697U CN201520437386.2U CN201520437386U CN204696697U CN 204696697 U CN204696697 U CN 204696697U CN 201520437386 U CN201520437386 U CN 201520437386U CN 204696697 U CN204696697 U CN 204696697U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model belongs to field of power system control, particularly relate to a kind of power-factor compensator with safety detecting system, comprise circuit board and be integrated in reactance group module on described circuit board, relay scanning array, LCR digital electric bridge detection module, precision current transformer, zero sequence current mutual inductor, system wireless control module and signal transacting, calculation and control module respectively; LCR digital electric bridge detection module is on circuit boards integrated, and LCR digital electric bridge detection module one end connects relay scanning array, the process of other end connection signal, calculation and control module, and relay scanning array connects each discrete component of reactance group module respectively; One end of precision current transformer is connected with power input, and the other end is connected with zero sequence current mutual inductor.Realize auto power-factor compensating, accomplish the continuity compensated.Improve the software algorithm of power factor compensation, improve equipment switching speed and compensation precision, farthest realize automation.
Description
Technical field
The utility model belongs to field of power system control, particularly relates to a kind of power-factor compensator with safety detecting system.
Background technology
In electric power system, improve power factor most important, it is directly connected to the electric energy loss of transmission line, the economy of power supply and quality.The indemnifying measure of power factor is always by power department and user are paid attention to.The power-factor automatic compensation controller of development high security, reliability has practical value.Traditional power factor compensating controller many employings discrete component or small scale integrated circuit manufacture and design, and function ratio is more single, fail safe and reliability low.
At present, the method that electrical network arranges reactive power compensation has: the dynamic compensation etc. that synchronous compensator, fixed capacity compensate and be made up of electric capacity and controlled (variable) inductance.Along with the development of intelligent control technology, reactive power compensation device will be used among more complicated system, security requirement for power factor compensation in industrial electrical network is more and more higher, but in actual applications various compensation technique automaticity, can continuity, suppression to mains by harmonics, have very large development space in control appliance reliability and fail safe.Such as, when reactance group breaks down, user possibly cannot Timeliness coverage, even if find fault, also wants to overhaul by stopping network system equipment.Like this, some type of productions user will bear the economic loss and cost of labor that equipment stops and maintenance brings.
Reactive power compensation is to electric power system important in inhibiting.At present, in some developed countries such as Europe, the United States, Japan, SVC compensation arrangement obtains extensive use, and the industrialization of SVG compensation arrangement also has the time of 10 years nearly.China's power grid construction and run and medium-term and long-termly there is reactive compensation capacity deficiency, be equipped with the problems such as unreasonable, reactive power compensation effect is undesirable, coefficient of safety is low, power factor compensation numerical value area not up to standard in the whole nation is a lot, and the digital average after power back-off is only 0.80.In a lot of electric power system, quick, accurate, safety, continuable compensation technique do not obtain substantial application.
Problems of the prior art are:
1) when reactive power compensation device works, equipment cannot be accomplished to detect constantly to reactance cabinet.When element corrupted appears in compensating cabinet, be also difficult to and alarm, cause device security hidden danger.
2) on market, some equipment can accomplish the detection to reactance compensation device, but cannot assess reactance damaged condition, and armamentarium of can only stopping transport, easily causes economic loss.
3) at present a lot of grid equipment does not realize auto power-factor compensating, or auto-compensation effect is poor, speed is slow, precision is low, it is discontinuous etc. to compensate, and makes equipment larger for the dependence of manpower.
Utility model content
Main purpose of the present utility model is the deficiency overcoming above-mentioned technology, and provides a kind of power-factor compensator with safety detecting system.Can accomplish to detect constantly to reactance cabinet, to the detection of reactance compensation device.
The utility model for achieving the above object, by the following technical solutions: a kind of power-factor compensator with safety detecting system, it is characterized in that, comprise circuit board and be integrated in reactance group module on described circuit board, relay scanning array, LCR digital electric bridge detection module, precision current transformer, zero sequence current mutual inductor, system wireless control module and signal transacting, calculation and control module respectively; Described LCR digital electric bridge detection module is on circuit boards integrated, LCR digital electric bridge detection module one end connects relay scanning array, the process of other end connection signal, calculation and control module, relay scanning array connects each discrete component of reactance group module respectively; One end of described precision current transformer is connected with power input, and the other end is connected with described zero sequence current mutual inductor; Described zero sequence current mutual inductor is connected with power output end, and described power output end is fixed on the outside of described circuit board; Described system wireless control module is positioned at described signal transacting, calculation and control module side.
Preferably, also comprise the earth leakage circuit-breaker be integrated on described circuit board, control end and touch screen interface,
The external button of facility switching, equipment are anxious stops button, power supply indicator, liquid crystal display; described earth leakage circuit-breaker is positioned at described circuit board top; suddenly stopping button is positioned at described signal transacting, calculation and control module side for the external button of described facility switching and equipment; described power supply indicator is positioned at described equipment and suddenly stops button bottom, and described LCDs is connected with touch screen interface with described control end.
Beneficial effect: 1) add LCR detection module in power back-off equipment, when equipment operation, by order transfer relay switch, carries out Scanning Detction to each module of reactance cabinet.If reactance component value exceedes software set threshold value, equipment enters alarm condition, and emergency stop switch can be coordinated to use this function.
2) to measure precision to impedance component value higher for LCR digital electric bridge module, and can provide the operation assessment data of equipment to reactance group and each element of reactance, output safety parameter is more accurate simultaneously.Like this, the warning function that equipment runs can be realized, just closing all devices without the need to slightly declining in each element function of compensating cabinet, avoiding the unnecessary economic loss that equipment start-stop brings.
3) realize auto power-factor compensating, accomplish the continuity compensated.Improve the software algorithm of power factor compensation, improve equipment switching speed and compensation precision, farthest realize automation.
Accompanying drawing explanation
Fig. 1 is composition frame chart of the present utility model;
Fig. 2 is principle schematic of the present utility model.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing and preferred embodiment.As shown in Figure 1; described apparatus comprises: power input end 1, precision current transformer 2, zero sequence current mutual inductor 3, earth leakage circuit-breaker 4, power output end 5, reactance group module 6, relay scanning array 7, LCR digital electric bridge module 8, system wireless control module 9, control end and touch screen interface 10, signal transacting, calculation and control module 11, the external button 12 of facility switching, equipment suddenly stop button 13, power supply indicator 14, liquid crystal display 15.Described LCR digital electric bridge detection module is on circuit boards integrated, LCR digital electric bridge detection module one end connects relay scanning array, the process of other end connection signal, calculation and control module, relay scanning array connects each discrete component of reactance group module respectively; One end of described precision current transformer is connected with power input, and the other end is connected with described zero sequence current mutual inductor; Described zero sequence current mutual inductor is connected with power output end, and described power output end is fixed on the outside of described circuit board; Described system wireless control module is positioned at described signal transacting, calculation and control module side; Described earth leakage circuit-breaker is positioned at described circuit board top; suddenly stopping button is positioned at described signal transacting, calculation and control module side for the external button of described facility switching and equipment; described power supply indicator is positioned at described equipment and suddenly stops button bottom, and described LCDs is connected with touch screen interface with described control end.
As shown in Figure 2, MCU kernel control module detects electrical appliance electrical quantities by data acquisition module, and calculates required capacitance, automatically provides switching scheme and realizes auto-compensation.This is reactive power automatic compensator operation principle.Meanwhile, LCR digital electric bridge module carries out Scanning Detction by control relay array to each capacity cell of capacitor box, and to MCU kernel control module feedback exact numerical.Threshold value set by this numerical value and MCU kernel control module compared, now threshold value is not certain numerical value specific simultaneously, but value range.If the capacitor's capacity that digital electric bridge detects exceeds setting threshold scope, then produce alarm signal, and automatic shield fault capacitance.If, capacitance generation significant change in capacitor array, but still in threshold range, then keep still former capacitance group to work on.No matter whether shield the electric capacity of capacitance change, all need MCU kernel control module to do total evaluation to capacitance group, and drop into standby electric capacity
c x , recalculate whole volume demand, hold backoff algorithm, to the capacitor switching scheme made new advances according to reactive power.
Note: electric capacity
c x calculating need be waken up with a start according to each component value of capacitor array and actual switching situation, under multi-boundary Condition, calculate suitable capacitance
c x .
Concrete function of the present utility model is as follows:
1) can have each element of reactance cabinet and accurately detect constantly, and be furnished with emergency stop device.
2) reported by LCR detection module output equipment element running state parameter.When equipment component running status declines, system provides Emergency Countermeasures automatically, ensures under the sub-kilter of equipment, still can trouble free service foot time enough, is that production unit reduces economic loss.
3) realize auto power-factor compensating, accomplish high accuracy and successional compensation;
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (2)
1. the power-factor compensator with safety detecting system, it is characterized in that, comprise circuit board and be integrated in reactance group module on described circuit board, relay scanning array, LCR digital electric bridge detection module, precision current transformer, zero sequence current mutual inductor, system wireless control module and signal transacting, calculation and control module respectively; Described LCR digital electric bridge detection module is on circuit boards integrated, LCR digital electric bridge detection module one end connects relay scanning array, the process of other end connection signal, calculation and control module, relay scanning array connects each discrete component of reactance group module respectively; One end of described precision current transformer is connected with power input, and the other end is connected with described zero sequence current mutual inductor; Described zero sequence current mutual inductor is connected with power output end, and described power output end is fixed on the outside of described circuit board; Described system wireless control module is positioned at described signal transacting, calculation and control module side.
2. the power-factor compensator with safety detecting system according to claim 1, it is characterized in that: also comprise the earth leakage circuit-breaker be integrated on described circuit board, control end and touch screen interface, the external button of facility switching, equipment is anxious stops button, power supply indicator, liquid crystal display, described earth leakage circuit-breaker is positioned at described circuit board top, suddenly stopping button is positioned at described signal transacting for the external button of described facility switching and equipment, calculation and control module side, described power supply indicator is positioned at described equipment and suddenly stops button bottom, described LCDs is connected with touch screen interface with described control end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437386.2U CN204696697U (en) | 2015-06-23 | 2015-06-23 | With the power-factor compensator of safety detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437386.2U CN204696697U (en) | 2015-06-23 | 2015-06-23 | With the power-factor compensator of safety detecting system |
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| Publication Number | Publication Date |
|---|---|
| CN204696697U true CN204696697U (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520437386.2U Withdrawn - After Issue CN204696697U (en) | 2015-06-23 | 2015-06-23 | With the power-factor compensator of safety detecting system |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882895A (en) * | 2015-06-23 | 2015-09-02 | 天津科技大学 | Power factor compensator with safety detection system |
-
2015
- 2015-06-23 CN CN201520437386.2U patent/CN204696697U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882895A (en) * | 2015-06-23 | 2015-09-02 | 天津科技大学 | Power factor compensator with safety detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151007 Effective date of abandoning: 20170419 |