CN212969047U - Calculation circuit for real-time output power of diesel generating set - Google Patents
Calculation circuit for real-time output power of diesel generating set Download PDFInfo
- Publication number
- CN212969047U CN212969047U CN202021279304.3U CN202021279304U CN212969047U CN 212969047 U CN212969047 U CN 212969047U CN 202021279304 U CN202021279304 U CN 202021279304U CN 212969047 U CN212969047 U CN 212969047U
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- proportional operational
- circuit
- proportional
- real
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model provides a calculation circuit for real-time output power of diesel generating set, include: the diode bridge type switch group, the output end group, the input end group and the proportional operational amplifier group; the diode bridge switch group is connected with the input end group circuit; the proportional operational amplifier group comprises a first proportional operational amplifier, a second proportional operational amplifier and a third proportional operational amplifier; the first proportional operational amplifier is connected with the input end group circuit, and the second proportional operational amplifier and the third proportional operational amplifier are connected with the diode bridge type switch group circuit; the first proportional operational amplifier is used for outputting a linear signal I total corresponding to the total current of the generator; the second proportional operational amplifier is used for outputting a linear signal KW of the active power of the generator; and the third proportional operational amplifier is used for outputting a linear signal KVAR of the reactive power of the generator. The utility model discloses a diode bridge type switch group and a plurality of proportion fortune are put, active power, reactive power and the total current with real-time measurement generator output to the linear relation of active power, reactive power, total current and output voltage after the output scale quantization.
Description
Technical Field
The utility model relates to a diesel generator field, concretely relates to a calculation circuit for real-time output power of diesel generating set.
Background
The scheme commonly adopted in the prior art is as follows: the current signal and the voltage signal output by each generator set are collected and input into a single chip microcomputer for analog/digital conversion and calculation processing, and are converted into standard numerical values of 4-20ma or 0-10VDC for output, and the digital display panel is provided. According to the scheme, when the type of the diesel generator set changes, a single chip microcomputer program needs to be changed, the field operation is inconvenient, the power calculation output value lags a real-time value, the harmonic wave resistance capability is poor, the circuit is complex, the fault rate is high, and more importantly, the problem that the output specification is difficult to match with a power limit control circuit is solved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to provide an active power, reactive power and the total current of real-time measurement generating set output to the circuit of the linear relation of active power, reactive power, total current and output voltage after the output scale quantization.
In order to solve the technical problem, the utility model provides a calculation circuit for real-time output power of diesel generating set, include:
the diode bridge type switch group, the input end group and the proportional operational amplifier group are connected in series;
the diode bridge switch group is connected with the input end group circuit;
the proportional operational amplifier group comprises a first proportional operational amplifier, a second proportional operational amplifier and a third proportional operational amplifier; the first proportional operational amplifier is connected with the input end group circuit, and the second proportional operational amplifier and the third proportional operational amplifier are connected with the diode bridge type switch group circuit;
the first proportional operational amplifier is used for outputting a linear signal I total corresponding to the total current of the generator;
the second proportional operational amplifier is used for outputting a linear signal KW of the active power of the generator;
and the third proportional operational amplifier is used for outputting a linear signal KVAR of the reactive power of the generator.
Furthermore, the input end group is connected with an external three-phase step-down transformer circuit and used for respectively adding input phase voltages to the diode bridge type switch groups.
Furthermore, the input end group is connected with an external current transformer circuit and used for inputting three-phase half-wave current to the inverted input end of the first proportional operational amplifier.
Further, the diode bridge switch group is formed by connecting a plurality of diode circuits.
Furthermore, the circuit also comprises an output end group, and the output end group is respectively connected with the first proportion operational amplifier, the second proportion operational amplifier and the third proportion operational amplifier circuit.
The working principle is as follows:
during normal operation, the line voltage of the generator passes through the three-phase step-down transformer to obtain phase voltages which are respectively added to the corresponding diode bridge switch groups, the secondary side currents of the current transformers of each phase of the generator are also added to the corresponding diode bridge switch groups, the outputs of the diode bridge switch groups are added to the inverting input ends of the second proportion operational amplifier and the third proportion operational amplifier after being overlapped, meanwhile, the current transformers output three-phase half-wave currents to the inverting input end of the first proportion operational amplifier, and finally the first proportion operational amplifier, the second proportion operational amplifier and the third proportion operational amplifier respectively output linear signals corresponding to the active power, the reactive power and the total current of the generator.
The beneficial effects of the utility model reside in that:
the utility model discloses a diode bridge type switch group and a plurality of proportion fortune are put, active power, reactive power and the total current with real-time measurement generator output to the linear relation of active power, reactive power, total current and output voltage after the output scale quantization.
The utility model discloses an use theoretical computational formula as the foundation, adopt the most basic KW, Itotal, KVAR computational method, the phase relation of the real-time voltage of ingenious diesel generating set output, current time sequence that utilizes, the looks voltage is as on-off control, the phase current has accomplished generating set output (KW, Itotal, KVAR) real-time operation as the bridge rectifier circuit of input, utilize former circuit 14VDC power to supply power for the operational amplifier circuit, through the output of operational amplifier conversion success rate limiting circuit required voltage class.
The utility model discloses the scheme circuit is simple, the fault rate is low, anti higher harmonic, response speed is fast and match with the power control circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a calculating circuit for real-time output power of a diesel generating set.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The invention is further described below with reference to the accompanying drawings and specific embodiments:
embodiment 1, as shown in fig. 1, the utility model provides a calculating circuit for real-time output power of diesel generating set, include:
the diode bridge type switch group, the output end group, the input end group and the proportional operational amplifier group;
the diode bridge switch group is formed by connecting six diode circuits;
the maximum current input of the input end group is 5A;
the diode bridge switch group is connected with the input end group circuit;
the proportional operational amplifier group comprises a first proportional operational amplifier, a second proportional operational amplifier and a third proportional operational amplifier; the first proportional operational amplifier is connected with the input end group circuit, and the second proportional operational amplifier and the third proportional operational amplifier are connected with the diode bridge type switch group circuit;
the first proportional operational amplifier is used for outputting a linear signal I total corresponding to the total current of the generator, wherein the I total is between 0 and 7.75V direct-current voltage;
the second proportional operational amplifier is used for outputting a linear signal KW of the active power of the generator, and the KW is between 0 and 8.04V direct-current voltage;
the third proportion operational amplifier is used for outputting a linear signal KVAR of the reactive power of the generator, and the KVAR is between 0 and 8.04 direct current voltage;
the input end group is connected with three external step-down transformer circuits, and input six-phase 115v alternating-current voltages are respectively applied to the diode bridge type switch groups.
The input end group is connected with an external current transformer circuit and used for inputting three-phase half-wave current to the inverted input end of the first proportional operational amplifier.
During normal operation, the line voltage of the generator passes through the three-phase step-down transformer to obtain phase voltages which are respectively added to the corresponding diode bridge switch groups, the secondary side currents of the current transformers of each phase of the generator are also added to the corresponding diode bridge switch groups, the outputs of the diode bridge switch groups are added to the inverting input ends of the second proportion operational amplifier and the third proportion operational amplifier after being overlapped, meanwhile, the current transformers output three-phase half-wave currents to the inverting input end of the first proportion operational amplifier, and finally the first proportion operational amplifier, the second proportion operational amplifier and the third proportion operational amplifier respectively output linear signals corresponding to the active power, the reactive power and the total current of the generator.
The above is a detailed introduction of the present invention, and the principles and embodiments of the present invention have been explained herein using specific embodiments, and the explanations of the above embodiments are only used to help understand the methods and core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (5)
1. A computational circuit for real-time output power of a diesel generator set, comprising:
the diode bridge type switch group, the input end group and the proportional operational amplifier group are connected in series;
the diode bridge switch group is connected with the input end group circuit;
the proportional operational amplifier group comprises a first proportional operational amplifier, a second proportional operational amplifier and a third proportional operational amplifier; the first proportional operational amplifier is connected with the input end group circuit, and the second proportional operational amplifier and the third proportional operational amplifier are connected with the diode bridge type switch group circuit;
the first proportional operational amplifier is used for outputting a linear signal I total corresponding to the total current of the generator;
the second proportional operational amplifier is used for outputting a linear signal KW of the active power of the generator;
and the third proportional operational amplifier is used for outputting a linear signal KVAR of the reactive power of the generator.
2. The calculating circuit for real-time output power of a diesel generator set according to claim 1, wherein the input terminal set is connected with an external three-phase step-down transformer circuit, and is used for applying input phase voltages to the diode bridge type switch sets respectively.
3. The calculating circuit for the real-time output power of the diesel generator set according to claim 1, wherein the input terminal set is connected with an external current transformer circuit and used for inputting three-phase half-wave current to the inverting input terminal of the first proportional operational amplifier.
4. The calculation circuit for real-time output power of a diesel generator set according to claim 1, wherein the diode bridge switch set is composed of a plurality of diode circuit connections.
5. The calculating circuit for the real-time output power of the diesel generating set according to claim 1, further comprising an output terminal set, wherein the output terminal set is respectively connected with the first proportional operational amplifier, the second proportional operational amplifier and the third proportional operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021279304.3U CN212969047U (en) | 2020-07-04 | 2020-07-04 | Calculation circuit for real-time output power of diesel generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021279304.3U CN212969047U (en) | 2020-07-04 | 2020-07-04 | Calculation circuit for real-time output power of diesel generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212969047U true CN212969047U (en) | 2021-04-13 |
Family
ID=75389840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021279304.3U Active CN212969047U (en) | 2020-07-04 | 2020-07-04 | Calculation circuit for real-time output power of diesel generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212969047U (en) |
-
2020
- 2020-07-04 CN CN202021279304.3U patent/CN212969047U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104953606B (en) | Networked layered compensation method for voltage unbalance of PCC (Point of Common Coupling) of islanded microgrid | |
| CN102142694A (en) | Rotational coordinate transformation based current decoupling control method for three-phase grid-connected inverter | |
| CN105871242B (en) | Single phase bidirectional converter control system | |
| CN106058931A (en) | Photovoltaic grid-connected inverter comprising electric energy quality processing, and control method thereof | |
| CN104467021A (en) | Three-phase multi-direction grid-connected inverter | |
| CN111177932B (en) | Modeling method for improving electromagnetic transient simulation speed of flexible substation | |
| CN108565892A (en) | A kind of fault ride-through method, device and photovoltaic generating system | |
| CN212969047U (en) | Calculation circuit for real-time output power of diesel generating set | |
| CN208767798U (en) | Dynamic SVG module and phase-change switch mixed type three-phase imbalance governing system | |
| CN111969650A (en) | Micro-grid improved droop control strategy based on power decoupling | |
| CN115078790B (en) | Alternating current electronic load device and triangular load implementation method thereof | |
| CN103532415B (en) | Based on the four bridge legs current transformer space vector modulating method of gh γ coordinate system | |
| CN203911558U (en) | Off-board conductive direct-current electric vehicle charger having APF function | |
| CN108322069A (en) | A kind of three-phase current source type power supply and load integral control system | |
| Chen et al. | Magnetizing Inrush Current Elimination Strategy Based on a Parallel Type Asynchronous Closing Hybrid Transformer | |
| CN111711225B (en) | Method and system for smoothly switching single-phase power supply of three-phase inverter power supply | |
| CN209446692U (en) | A kind of detection circuit and DC Electronic Loads for grid-connecting apparatus | |
| CN209767395U (en) | Voltage sag generator and voltage sag generating system | |
| CN108215806B (en) | Regenerative braking energy feedback system | |
| Mikhail et al. | Analysis and study of cycloconverter based on rotating magnetic field transformer | |
| Li et al. | Per-phase control strategy of the three-phase four-wire inverter | |
| CN203553949U (en) | Double-DSP SVG based on linear secondary regulator | |
| Cao et al. | Detailed design and control of three-phase aviation inverter | |
| CN213693151U (en) | Alternating current voltage stabilizing system with reactive compensation | |
| CN109462241A (en) | Flying capacitor type modular multilevel reactive power compensator based on unbalanced load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |