CN211505728U - Program-controlled complex power quality disturbance generation system - Google Patents
Program-controlled complex power quality disturbance generation system Download PDFInfo
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- CN211505728U CN211505728U CN201921993610.0U CN201921993610U CN211505728U CN 211505728 U CN211505728 U CN 211505728U CN 201921993610 U CN201921993610 U CN 201921993610U CN 211505728 U CN211505728 U CN 211505728U
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Abstract
The utility model discloses a programme-controlled complicated electric energy quality disturbance takes place system, this system includes alternating current power supply, step-down transformer and multinode electric wire netting, the multinode electric wire netting passes through step-down transformer and alternating current power supply electric connection, be connected with a plurality of node loads on the multinode electric wire netting, be connected through exchanging contactless switch one-to-one between a plurality of node loads and a plurality of electric energy quality disturbance sources, a plurality of electric energy quality disturbance sources are the different grade type each other, exchange contactless switch's control end and control signal generator electric connection, control signal generator exchanges contactless switch's break-make through the control. The utility model provides a programme-controlled complicated electric energy quality disturbance emergence system can enough realize the single emergence to voltage sag/liter, harmonic, voltage fluctuation and power supply interruption, also can realize complicated electric energy quality problem simultaneous occurrence, and easy operation, very big improvement test efficiency, higher experimental using value has.
Description
Technical Field
The utility model relates to a technical field, especially relate to a system takes place for programme-controlled complicated power quality disturbance takes place for power quality disturbance.
Background
With the access of a large number of new energy power generation devices and impact loads to a power grid and the large use of nonlinear loads and power electronic equipment, the complexity of the load of a power system is greatly increased, which causes the abnormity of the power quality, greatly influences daily life and industrial power utilization, and particularly causes huge economic loss in high-precision power utilization industries such as chip manufacturing and the like due to tiny abnormity of the power quality, so that the problem of power quality is solved. In order to improve and treat the power quality problem, the research on the power quality and the generation process thereof have important significance on the development of power systems and economy in the modern society.
The problem of power quality is increasingly serious and complicated, the phenomenon of a plurality of social problems caused by the problem of power quality in actual operation cannot be ignored, the power quality disturbances are various and difficult to analyze, typical single disturbances comprise voltage sag/rise, harmonic waves, voltage fluctuation and the like, and meanwhile, composite disturbances formed by combining a plurality of single disturbances exist in field application. In order to research the occurrence characteristics of various power quality problems, a corresponding test system is required to provide voltage waveform and data information required by the test.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a programme-controlled complicated electric energy quality disturbance takes place system can enough realize also can realize complicated electric energy quality problem simultaneous occurrence to voltage sag/liter, harmonic, voltage fluctuation and the single emergence of power supply interruption, and easy operation, very big improvement test efficiency, higher experimental using value has.
In order to achieve the above object, the utility model provides a following scheme:
a programmable complex power quality disturbance generating system, the system comprising: the multi-node power grid is electrically connected with the alternating current power supply through the step-down transformer, a plurality of node loads are connected onto the multi-node power grid, the node loads and the power quality disturbance sources are connected in a one-to-one correspondence mode through alternating-current contactless switches, the power quality disturbance sources are different in type, a control end of the alternating-current contactless switch is electrically connected with a control signal generator, and the control signal generator controls on and off of the alternating-current contactless switch to achieve access or cut-out of the power quality disturbance sources.
Optionally, the multi-node grid is an 11-node grid.
Optionally, the number of the node loads is at least 4, and the plurality of power quality disturbance sources include a voltage sag source, a harmonic source, and a voltage fluctuation source, which are respectively connected to the 4 node loads through ac contactless switches in a one-to-one correspondence manner.
Optionally, the program-controlled complex power quality disturbance generation system further includes a voltage interruption source, and the voltage interruption source is disposed on the multi-node power grid and electrically connected to the control signal generator.
Optionally, the voltage sag source includes an asynchronous motor arranged in series, the voltage sag source includes an ac impedance load and a capacitor arranged in parallel, the harmonic source includes an uncontrolled rectifying circuit and a dc resistance load arranged in series, the voltage fluctuation source includes a photovoltaic power generation system arranged in series, and the voltage interruption source is a circuit breaker arranged between two adjacent node loads.
Optionally, the control signal generator includes a program controller and a driving circuit, and the program controller is connected to the ac contactless switch through the driving circuit.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect: the utility model provides a program-controlled complex power quality disturbance generation system, an alternating current power supply completes the power supply to a multi-node power grid through a step-down transformer and a lead; the control signal generator controls the driving circuit to send out driving signals through the process controller according to requirements, one or more alternating-current contactless switches are controlled to be switched on, the other alternating-current contactless switches are switched off, the type of an electric energy quality disturbance source accessed into a node power grid is further controlled, simulation of a single electric energy quality problem or a complex electric energy quality problem is completed, the voltage waveform of a grid connection point of the electric energy quality disturbance source completely meets the requirement of a test, simulation of multiple electric energy quality problems can be completed efficiently, and a test basis can be provided for research of the complex electric energy quality problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and 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 inventive labor.
Fig. 1 is a schematic structural diagram of a complex power quality disturbance generation system implemented by a routine program of the present invention;
description of reference numerals: 101. an alternating current power supply; 102. a step-down transformer; 103. a multi-node power grid; 104. a node load; 2. a control signal generator; 3. an alternating current contactless switch; 401. a voltage sag source; 402. a voltage sag source; 403. a source of voltage fluctuation; 404. a source of harmonics; 405. a voltage interrupt source.
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 work belong to the protection scope of the present invention.
The utility model aims at providing a programme-controlled complicated electric energy quality disturbance takes place system can enough realize also can realize complicated electric energy quality problem simultaneous occurrence to voltage sag/liter, harmonic, voltage fluctuation and the single emergence of power supply interruption, and easy operation, very big improvement test efficiency, higher experimental using value has.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the embodiment of the present invention provides a program-controlled complex power quality disturbance generation system, which includes: the multi-node power grid 103 is electrically connected with the alternating current power supply 101 through the step-down transformer 102, a plurality of node loads 104 are connected to the multi-node power grid 103, the node loads 104 are connected with the power quality disturbance sources through alternating-current contactless switches 3 in a one-to-one correspondence mode, the power quality disturbance sources are different in type, a control end of the alternating-current contactless switch 3 is electrically connected with a control signal generator 2, and the control signal generator 2 controls the on-off of the alternating-current contactless switch 2 to achieve access or cut-out of the power quality disturbance sources. The negative pole of the ac power supply 101 is grounded through a ground line, and the positive pole of the ac power supply 101 is connected to each node load through a step-down transformer 102 and a lead. The electric energy quality disturbance source is grounded through a ground wire.
The node loads are set to be at least 4, if the multi-node power grid is an 11-node power grid, 4 of the node loads are selected, and the plurality of electric energy quality disturbance sources comprise a voltage sag source 401, a voltage sag source 402, a harmonic source 404 and a voltage fluctuation source 403, and are respectively connected with the 4 node loads through the alternating-current contactless switches 3 in a one-to-one correspondence mode. The program-controlled complex power quality disturbance generation system further comprises a voltage interruption source 405, the medium-voltage interruption source 405 is also a power quality disturbance source, the voltage interruption source 405 is arranged on the multi-node power grid 103 and is electrically connected with the control signal generator 2, and the control signal generator 2 controls the voltage interruption source 405 to be turned on or turned off.
The voltage sag source 401 comprises an asynchronous motor arranged in series, the voltage sag source 402 comprises an alternating current impedance load and a capacitor arranged in parallel, the harmonic source 404 comprises an uncontrolled rectifying circuit and a direct current resistive load arranged in series, the voltage fluctuation source 403 comprises a photovoltaic power generation system arranged in series, and the voltage interruption source 405 is a circuit breaker arranged between two adjacent node loads.
The control signal generator 2 comprises a program controller and a driving circuit, and the program controller is connected with the alternating current contactless switch 3 through the driving circuit.
The control signal generator 2 controls a driving circuit through the program controller to realize the opening or closing of the alternating-current contactless switch 3, and further controls the type of the electric energy quality disturbance source accessed into the 11-node power grid.
The alternating-current contactless switch 3 can complete corresponding instantaneous action according to the driving signal, and the requirement of the test on the grounding speed is met; the initial state of the alternating current contactless switch 3 in the system is disconnected, and the control signal generator 2 can send a driving signal to the alternating current contactless switches 3 corresponding to a single or a plurality of electric energy quality disturbance sources through a signal line; the drive signal controls the opening of the alternating-current contactless switch 3, and the alternating-current contactless switch 3 which does not receive the drive signal is closed; the access of single or multiple power quality disturbance sources 4 to the 11-node power grid can be realized through the demand control of the control signal generator 2. The 11-node power grid provides a grid-connected point for accessing the power quality disturbance source, and the 11-node power grid operates in a radiation mode and is a stable initial grid-connected environment. The electric energy quality disturbance source selects a reasonable disturbance source according to actual conditions, so that the corresponding electric energy quality problem can be well displayed, in the embodiment, the voltage sag source is asynchronous motor starting, the voltage sag source is capacitor operation, the harmonic source is an uncontrolled rectifying circuit, the voltage fluctuation source is a photovoltaic power generation system, and the voltage interruption source is a circuit breaker which is arranged in series in a power grid. The instantaneous action time of the alternating-current contactless switch 3 after receiving the driving signal is in a nanosecond level, and the alternating-current contactless switch 3 can complete instantaneous action according to the received driving signal.
The utility model provides a program-controlled complex power quality disturbance generation system, an alternating current power supply completes the power supply to a multi-node power grid through a step-down transformer and a lead; the control signal generator controls the driving circuit to send out driving signals through the process controller according to requirements, one or more alternating-current contactless switches are controlled to be switched on, the other alternating-current contactless switches are switched off, the type of an electric energy quality disturbance source accessed into a node power grid is further controlled, simulation of a single electric energy quality problem or a complex electric energy quality problem is completed, the voltage waveform of a grid connection point of the electric energy quality disturbance source completely meets the requirement of a test, simulation of multiple electric energy quality problems can be completed efficiently, and a test basis can be provided for research of the complex electric energy quality problem.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. A program-controlled complex power quality disturbance generation system is characterized by comprising: the multi-node power grid is electrically connected with the alternating current power supply through the step-down transformer, a plurality of node loads are connected onto the multi-node power grid, the node loads and the power quality disturbance sources are connected in a one-to-one correspondence mode through alternating-current contactless switches, the power quality disturbance sources are different in type, a control end of the alternating-current contactless switch is electrically connected with a control signal generator, and the control signal generator controls on and off of the alternating-current contactless switch to achieve access or cut-out of the power quality disturbance sources.
2. The system for programmed generation of complex power quality disturbances according to claim 1, characterized in that the multi-node grid is an 11-node grid.
3. The program-controlled complex power quality disturbance generation system according to claim 1, wherein the number of the node loads is at least 4, and the plurality of power quality disturbance sources comprise a voltage sag source, a harmonic source and a voltage fluctuation source, which are respectively connected with the 4 node loads through alternating-current contactless switches in a one-to-one correspondence manner.
4. The programmable complex power quality disturbance generation system of claim 3, further comprising a voltage interrupt source, wherein the voltage interrupt source is disposed on the multi-node power grid and electrically connected to the control signal generator.
5. The programmable complex power quality disturbance generating system according to claim 4, wherein the voltage sag source comprises an asynchronous motor arranged in series, the voltage sag source comprises an alternating current impedance load and a capacitor arranged in parallel, the harmonic source comprises an uncontrolled rectifying circuit and a direct current resistive load arranged in series, the voltage fluctuation source comprises a photovoltaic power generation system arranged in series, and the voltage interruption source is a circuit breaker arranged between two adjacent node loads.
6. The system for generating program-controlled complex power quality disturbance according to claim 1, wherein the control signal generator comprises a program controller and a driving circuit, and the program controller is connected with the alternating-current contactless switch through the driving circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921993610.0U CN211505728U (en) | 2019-11-18 | 2019-11-18 | Program-controlled complex power quality disturbance generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921993610.0U CN211505728U (en) | 2019-11-18 | 2019-11-18 | Program-controlled complex power quality disturbance generation system |
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| CN211505728U true CN211505728U (en) | 2020-09-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960358A (en) * | 2021-11-02 | 2022-01-21 | 国网北京市电力公司 | Electric energy quality test system |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960358A (en) * | 2021-11-02 | 2022-01-21 | 国网北京市电力公司 | Electric energy quality test system |
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