CN2826489Y - Digitalized active regulation energy-saving device - Google Patents
Digitalized active regulation energy-saving device Download PDFInfo
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- CN2826489Y CN2826489Y CN 200520068566 CN200520068566U CN2826489Y CN 2826489 Y CN2826489 Y CN 2826489Y CN 200520068566 CN200520068566 CN 200520068566 CN 200520068566 U CN200520068566 U CN 200520068566U CN 2826489 Y CN2826489 Y CN 2826489Y
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Abstract
The utility model relates to a digitalized active regulation energy-saving device which comprises a measuring circuit comprising a sensing element, a control circuit and a main circuit comprising an inverter and a switching shifting device, wherein a measurement signalcollecting end of the measuring circuit is coupled with an electric network, and a feedback end of the measurement signals is connected with a signal input end of the control circuit. An output end of an offset current of the main circuit is connected with the electric network. The utility model is characterized in that the control circuit comprises a main control DSP chip and an RAM connected with a corresponding port of the main control DSP chip, and an output end of a control signal of the control circuit is connected with a drive end of the inverter of the main circuit and a controlled end of the switching shifting device. An active regulating device and an integrative analyzer of power supply quality are organically combined by the utility model, so the utility model can response in time, realize the active regulation with high accuracy and ensure the quality of power supply.
Description
Technical field:
The utility model relates to a kind of meritorious adjusting energy saver, especially relates to the meritorious energy saver of regulating of a kind of three-phase 380V distribution system novel digital.Belong to the electric power facility technical field.
Background technology:
Along with economy grows continuously and fast, clean, efficient electrical power energy demand are promoted significantly, meanwhile urban and urual areas of whole country's electric network reconstruction is pushed forward comprehensively, the town and country power load increases fast, and power industry is for improving power supply quality, reduce the electrical network loss, the control harmonic pollution in electric power net, building the quality supply environment, strive for aspect such as first-class power supply enterprise and spared no time to do a large amount of work.But in electric system because the terminal three-phase load distributes uneven, cause system's three-phase imbalance, zero-sequence current is big, the center line loss is serious, transformer off-center operation meeting reduces exerting oneself of transformer greatly, influence transformer serviceable life, increase the running wastage of transformer, had a strong impact on and used electricity quality.And existing power network compensation device can only the compensation network reactive power, can't realize compensation and adjusting to active power, and this can not adapt to the requirement of power supply development.
Summary of the invention:
Primary and foremost purpose of the present utility model is: at the three phases active power imbalance that exists in the existing three-phase 380V distribution system and the problem of zero-sequence current loss, propose a kind of to system's active power step-less adjustment, the three-phase equilibrium of gaining merit of realization system, reduce the zero-sequence current loss, reduce transformer and allow loss, increase the meritorious energy saver of regulating of the novel digital of exerting oneself of transformer, thereby adapt to the requirement that electric power system develops rapidly.
The further purpose of the utility model is: propose a kind of low-voltage distribution system digitalized active power regulating energy-saving device that can convenient realization parameter instruction transmitted in both directions, thereby help to improve compensation precision of the present invention and dynamic responding speed.
Primary and foremost purpose of the present utility model is achieved in that a kind of digitalized active power regulating energy-saving device, by the metering circuit that contains sensing element, control circuit is formed with the main circuit that contains inverter and break-make switching device, the measuring-signal collection terminal of described metering circuit and electrical network coupling, the signal input part of measuring-signal feedback end connection control circuit, the offset current output terminal of described main circuit gets access to grid, described control circuit mainly is made of the RAM that master control dsp chip and corresponding port with this chip connect, and the control signal output ends of described control circuit connects the controlled end of main circuit inverter driving moved end and break-make switching device.
During work, the sensing element in the metering circuit is monitored voltage, electric current and the power factor (PF) variation of electrical network, and in real time the measuring-signal that collects is fed back to control circuit, directly delivers to dsp chip after digitizing.Dsp chip is according to the synchronization pulse and the thermal relay signal of system, after the digitized signal of input carried out computational analysis and send, send control signals such as inverter drive pulse signal and on-off controller spare switching to main circuit, thereby make main circuit realize meritorious the adjusting.
Because the utility model has adopted high-performance, intelligentized dsp processor, therefore will gain merit regulating device and comprehensive electric energy quality analyser organically combine, and can in time respond, and realize high-precision meritorious adjusting, guarantee power supply quality.
Description of drawings:
Fig. 1 is the general structure synoptic diagram of an embodiment of the present utility model.
Fig. 2 is the circuit theory diagrams of control circuit among Fig. 1 embodiment.
Fig. 3 is the circuit theory diagrams of metering circuit among Fig. 1 embodiment.
Fig. 4 is the circuit theory diagrams of main circuit among Fig. 1 embodiment.
Embodiment:
Embodiment one:
The general structure of present embodiment digitalized active power regulating energy-saving device is made up of metering circuit, control circuit, main circuit, telepilot (not shown) and power circuit as shown in Figure 1.Wherein the measuring-signal collection terminal of metering circuit is coupled the signal input part of measuring-signal feedback end connection control circuit with the electrical network that connects load.The control signal output ends of control circuit connects the controlled end of main circuit.The offset current output terminal of main circuit gets access to grid.Telepilot can with the control circuit both-way communication.Power circuit is in order to provide the power supply of metering circuit, control circuit.
Control circuit as shown in Figure 2, the RAM that is connected by master control dsp chip (digital signal processor) and corresponding port with this chip constitutes.Control circuit receives from the feedback variable of metering circuit, the synchronization pulse of system and the signal of thermal relay, and dsp chip carries out computational analysis to the digitized signal of input, sends following signal:
---the drive pulse signal of main circuit IGBT
---the switching signal of electromagnetic contactor, relay
---duty display lamp control signal (operation, electric voltage exception protection, current anomaly protection, overheating protection, open-phase protection)
Metering circuit as shown in Figure 3, mainly by operational amplifier, lift circuit and the clamper diode constitutes, in order to sampled measurements and feedback signal.Metering circuit does not adopt traditional voltage, current transformer, but with Hall element with lift the mode that circuit combines system and feedback signal are gathered.Sampling and feedback signal are after metering circuit is through conditioning, directly send into the core of control circuit---dsp chip, specifically, Hall element in the metering circuit is respectively through current-limiting resistance and electrical network access point and the coupling of main circuit current output terminal, and the isolation of the signal process operational amplifier that sampling is come flows to and lifts circuit.Lift circuit and form by 3.3VA power supply and resistance R 510/R5110, the signal of operational amplifier is controlled at 0 through carrying behind the circuit its level range～+ 3.3V between.The output terminal that lifts circuit is connected to the clamping circuit input end.The pincers puller circuit is made up of diode D504, D503.The clamping circuit output terminal is directly connected on the pin ADC0～ADC9 of responsible sampling of DSP.Finish various operation of data and processing by the DPS chip.
In metering circuit, nine measured feedbacks of variable such as total access point voltage, dc voltage, load current, output current.
Main circuit as shown in Figure 4, essence is three-phase two-level inversion device and inrush current prevention circuit, main devices has: four two element IGBT (insulated gate bipolar transistor) module, four reactor L
1, L
2, L
3, L
4, capacitor C, three-phase electromagnetic contactor SW
2, relay and inrush current prevention resistance R.After the parallel connection of four two element IGBT modules, in parallel with the series circuit of inrush current prevention resistance R and capacitor C, constitute three-phase two-level inversion device, first three of this an inverter output terminal respectively with three electric SW
2Three pairs of main contactss connect respectively, three pairs of main contactss are connected respectively to the three-phase voltage of three-phase low-voltage distribution system.The 4th output terminal of inverter and zero line reactor L
4Input end link to each other zero line reactor L
4Output terminal be connected to the zero line of three-phase power distribution system.
Experiment shows that present embodiment has following characteristics:
1) be core with high performance dsp processor, finish whole control operations and calculate, the precision height, speed is fast, can reach the voltage measurement precision: 0.5%; Current measurement precision: 0.1%; Wattful power messurement precision: 0.5%; Reactive power precision: 0.1%; Power-factor measurement precision: 0.5%; Active electrical degree measuring accuracy: 0.1%; Idle electric degree is counted measuring accuracy: 0.5%.
2) can put, and step-less adjustment active power the three-phase equilibrium of gaining merit of realization system into operation according to control mode and the controlled variable set.Reduce the wastage, increase exerting oneself of transformer.
3) can compensate zero-sequence current, eliminate the zero sequence loss.
4) have comprehensive electric energy quality monitor function, can show and write down three-phase voltage, electric current, power factor, active power, reactive power, active electrical degree, the idle electric degree of distribution and idle electric degree, the voltage and current resultant distortion rate that self takes place simultaneously.
5) the every fixed point distribution constantly record data that can store 24 hours every days and statistics (comprising that voltage, electric current, power factor, meritorious, idle, active electrical degree, idle electric degree, day voltage/current are worth, have a power failure constantly, add up power off time, every overvoltage/under-voltage/phase shortage moment and time etc. mutually most).
6) control mode of science: control mode is divided three kinds: constant power factor control, constant voltage control, constant power factor and constant voltage automatically switch and control.Control accuracy is: constant power factor control accuracy: ± 0.5%; Constant voltage control accuracy: ± 0.5%.
7) IGBT is had hardware protection circuit and buffering circuit, have superpotential, under-voltage, excess current, overheated, anti-lightning strike and phase shortage warning and defencive function, and form action report automatically.
8) have working power, output loop duty protection action Presentation Function.
9) have automatic detection and adjust electric current automatically and the voltage transformer (VT) polar functionalities, make the electric current input not be subjected to polarity effect.
When 10) running into abnormal conditions such as superpotential, under-voltage, excess current, overheated phase shortage, can report to the police automatically, light corresponding warning, light corresponding alarm lamp, the corresponding control function automatically of locking simultaneously writes down various failure messages.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation form, all drop in the protection domain of requirement of the present invention.
Claims (4)
1, a kind of digitalized active power regulating energy-saving device, comprise the metering circuit that contains sensing element, control circuit and the main circuit that contains inverter and break-make switching device, the measuring-signal collection terminal of described metering circuit and electrical network coupling, the signal input part of measuring-signal feedback end connection control circuit, the offset current output terminal of described main circuit gets access to grid, it is characterized in that described control circuit comprises the RAM that master control dsp chip and corresponding port with this chip connect, the control signal output ends of described control circuit connects the controlled end of main circuit inverter driving moved end and break-make switching device.
2, a kind of digitalized active power regulating energy-saving device according to claim 1, it is characterized in that described metering circuit comprises Hall element, operational amplifier, lifts circuit and clamper diode, Hall element as sensing element is coupled with electrical network access point and main circuit current output terminal respectively, output to control circuit by lifting circuit, the direct current pressure side of described main circuit is behind divider resistance, by the dsp chip signal input port of clamper diode connection control circuit.
3, a kind of digitalized active power regulating energy-saving device according to claim 2, it is characterized in that Hall element in the metering circuit is respectively through current-limiting resistance and electrical network access point and the coupling of main circuit current output terminal, the isolation of the signal process operational amplifier that the Hall element sampling is come flows to and lifts circuit, lift circuit and comprise 3.3VA power supply and resistance R 510, R5110, lift circuit output end and be connected to the clamping circuit input end, the pincers puller circuit comprises diode D504 and D503, and the clamping circuit output terminal is directly connected on the pin ADC0～ADC9 of responsible sampling of DSP.
4,, it is characterized in that described main circuit comprises four two element IGBT modules, four reactor L according to claim 1,2 or 3 described a kind of digitalized active power regulating energy-saving devices
1, L
2, L
3, L
4, capacitor C, three-phase electromagnetic contactor SW
2, relay and inrush current prevention resistance R, in parallel after the parallel connection of described four two element IGBT modules with the series circuit of inrush current prevention resistance R and capacitor C, constitute three-phase two-level inversion device, first three of a described inverter output terminal respectively with three reactor L
1, L
2, L
3Input end link to each other, the output terminal of described three reactors respectively with electromagnetic contactor SW
2Three pairs of main contactss connect respectively, three pairs of main contactss are connected respectively to the three-phase voltage of three-phase low-voltage distribution system, the 4th output terminal of inverter and zero line reactor L
4Input end link to each other zero line reactor L
4Output terminal be connected to the zero line of three-phase power distribution system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520068566 CN2826489Y (en) | 2005-01-25 | 2005-01-25 | Digitalized active regulation energy-saving device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520068566 CN2826489Y (en) | 2005-01-25 | 2005-01-25 | Digitalized active regulation energy-saving device |
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| CN2826489Y true CN2826489Y (en) | 2006-10-11 |
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| CN 200520068566 Expired - Lifetime CN2826489Y (en) | 2005-01-25 | 2005-01-25 | Digitalized active regulation energy-saving device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337378C (en) * | 2005-01-25 | 2007-09-12 | 江苏方程电力科技有限公司 | Digitalized active power regulating energy-saving device |
| CN101938133A (en) * | 2010-09-19 | 2011-01-05 | 浙江省电力试验研究院 | Reverse blocking type IGBT (Insulated Gate Bipolar Translator) based compensating method of PWM (Pulse-Width Modulation) control capacitance type SVC (Static Var Compensator) |
| CN101813959B (en) * | 2009-02-25 | 2013-08-21 | 艾默生网络能源系统北美公司 | Control device of power factor correcting circuit and control method |
| CN107300897A (en) * | 2017-07-14 | 2017-10-27 | 宁波三星医疗电气股份有限公司 | A kind of electrical equipment power consumption detecting system and management method |
-
2005
- 2005-01-25 CN CN 200520068566 patent/CN2826489Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337378C (en) * | 2005-01-25 | 2007-09-12 | 江苏方程电力科技有限公司 | Digitalized active power regulating energy-saving device |
| CN101813959B (en) * | 2009-02-25 | 2013-08-21 | 艾默生网络能源系统北美公司 | Control device of power factor correcting circuit and control method |
| CN101938133A (en) * | 2010-09-19 | 2011-01-05 | 浙江省电力试验研究院 | Reverse blocking type IGBT (Insulated Gate Bipolar Translator) based compensating method of PWM (Pulse-Width Modulation) control capacitance type SVC (Static Var Compensator) |
| CN101938133B (en) * | 2010-09-19 | 2012-07-04 | 浙江省电力试验研究院 | Reverse blocking type IGBT (Insulated Gate Bipolar Translator) based compensating method of PWM (Pulse-Width Modulation) control capacitance type SVC (Static Var Compensator) |
| CN107300897A (en) * | 2017-07-14 | 2017-10-27 | 宁波三星医疗电气股份有限公司 | A kind of electrical equipment power consumption detecting system and management method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070912 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |