CN103743931A - High-power grid voltage simulation circuit - Google Patents
High-power grid voltage simulation circuit Download PDFInfo
- Publication number
- CN103743931A CN103743931A CN201410002983.2A CN201410002983A CN103743931A CN 103743931 A CN103743931 A CN 103743931A CN 201410002983 A CN201410002983 A CN 201410002983A CN 103743931 A CN103743931 A CN 103743931A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- energy conversion
- electrical network
- unit
- 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.)
- Granted
Links
Images
Landscapes
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a high-power grid voltage simulation circuit, which is characterized in that the high-power grid voltage simulation circuit comprises a starting unit, an energy conversion unit, a filter unit and a detection and control system; the starting unit comprises a resistor and a contactor which are mutually connected in parallel, and the two ends of the contactors are respectively connected with a grid voltage input end and the energy conversion unit; the energy conversion unit comprises three single-phase systems and the circuit structure of each single-phase system is divided into a rectification part and an inversion part; the detection and control system is used for simulating a normal working situation and various abnormal working, flickering and fault situations of grid voltage. The high-power grid voltage simulation circuit provided by the invention has the advantages that since the output of simulation quantity through a PWM (Pulse-Width Modulation) rectification and inversion circuit, the actual situation of the grid voltage is genuinely reflected; the demand of simulation tests of high-power products can be met; the structure is simple and the safety and the reliability are high.
Description
Technical field
The present invention relates to a kind of high-power electrical network voltage analog circuit.
Background technology
The test platform of power quality controlling equipment partly consists of electrical network simulation test device, electrical energy power quality disturbance generating means and system monitoring, large power, electrically potential source as electrical network simulation test device, its equivalent resistance is adjustable, can simulate the characteristic of test product under different electrical network parameters.At present, many to the research of voltage sag simulation device, the research of special electrical network simulation test device is less.Some relevant researchs are mainly the research of Focus Control method, and pay close attention to grid stimulating device seldom.
The domestic and international research for grid stimulating device is at present system not, and there is no corresponding standards and norms, analog power performance on market is incomplete and expensive, these bring very large inconvenience all to the research of power quality controlling equipment and test, so necessary, high-power electrical network simulation test device are studied.
In the test platform of power quality controlling equipment, need a large power, electrically potential source, voltage condition to electrical network is simulated, meet test platform and can carry out Related product national standard or the desired all test items of industry standard, comprise voltage fluctuation and flickering, frequency change, electrical network three-phase imbalance, reactive-load compensation and harmonic voltage test etc.
The present invention, in conjunction with the specific requirement of high-power electrical network voltage, proposes a kind of mimic channel, can be used for the real as far as possible power grid environment of simulation, to meet the test of power quality controlling equipment and testing requirements.
Summary of the invention
The object of the present invention is to provide a kind of high-power electrical network voltage analog circuit, on meeting the basis of high-power power quality controlling testing of equipment demand, summed up the function that grid stimulating device should be realized, set up line voltage mimic channel, the present invention can simulating grid actual conditions, device structure is simple, and reduces holistic cost.
For achieving the above object, technical scheme of the present invention is: a kind of high-power electrical network voltage analog circuit, is characterized in that: comprise start unit, energy conversion unit, filter unit and inspection and control system;
Described start unit comprises resistance and the contactor being connected in parallel, and contactor two ends connect respectively line voltage input and energy conversion unit;
Described energy conversion unit comprises three monophase systems, and each monophase system circuit structure is divided into rectifying part and Converting Unit;
Described inspection and control system, by data acquisition and processing, is controlled energy conversion unit, and data communication is carried out on realization and backstage;
Described energy conversion unit, filter unit and inspection and control system interconnect between any two.
Further, the rectifying part of described monophase system adopts three-phase PWM rectification circuit to realize, and for the line voltage of rectification input, and outgoing side adopts DC capacitor voltage stabilizing.
Further, the Converting Unit of described monophase system adopts single-phase PWM inverter circuit to realize, and for the DC voltage that rectifying part is produced, carries out inversion, and DC voltage is converted into and sinusoidal wave equivalent PWM voltage waveform.
Further, the inverter circuit of described Converting Unit is by the turn-on and turn-off of the driving circuit control device of switching device; The brachium pontis output terminal of described Converting Unit connects described filter unit, the higher hamonic wave producing in order to the output of filtering brachium pontis.
Further, described inspection and control system comprise successively connect for gathering optical communication interface, data acquisition and treatment circuit, control and testing circuit and fault and the holding circuit of voltage and current signal; Described inspection and control system can carry out data communication with background system.
Further, described data acquisition and treatment circuit, control and testing circuit and fault and holding circuit form by single chip circuit.
Further, described inspection and control system is also connected with some voltage detection units and current detecting unit.
Further, described some voltage detection units are respectively used to DC voltage and the simulating grid output voltage of the rectifying part output of detection of grid voltage, monophase system; Described some current detecting units are respectively used to detect brachium pontis electric current, simulating grid output current and the three-phase alternating current inductive current of monophase system Converting Unit.
Further, the principle of work of described energy conversion unit is: rectifying part, three-phase alternating current A, B, C three-phase produce DC voltage by three pulse width modulation (PWM) rectification circuits respectively, and at outgoing side via DC capacitor voltage stabilizing; Converting Unit, adopt single-phase PWM inverter circuit, the turn-on and turn-off of the driving circuit control device by switching device, the DC voltage that rectifying part is produced is carried out inversion, be converted into and sinusoidal wave equivalent PWM voltage waveform, and add the above filter unit filtering higher hamonic wave at outgoing side.
Compared to prior art, the present invention has following beneficial effect:
1, the present invention is by the output of PWM rectification and inverter circuit control simulation amount, actual response the actual conditions of line voltage;
2, can meet the simulation test of high-power test product;
3, the present invention is simple in structure, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the high-power electrical network voltage analog of the present invention circuit system structure.
Fig. 2 is energy conversion unit main circuit structure of the present invention.
Fig. 3 is inspection and control system schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described.
As Figure 1-3, a kind of high-power electrical network voltage analog circuit of the present invention, is characterized in that: comprise start unit, energy conversion unit, filter unit and inspection and control system;
Described start unit comprises resistance and the contactor being connected in parallel, and contactor two ends connect respectively line voltage input and energy conversion unit;
Described energy conversion unit comprises three monophase systems, and each monophase system circuit structure is divided into rectifying part and Converting Unit;
Described inspection and control system, by data acquisition and processing, is controlled energy conversion unit, and data communication is carried out on realization and backstage;
Described energy conversion unit, filter unit and inspection and control system interconnect between any two.
The function that comprises higher harmonic components fault in order to realize analog voltage, need the subsystem rectification side of three-phase separate, the rectifying part of described monophase system adopts three-phase PWM rectification circuit to realize, and for the line voltage of rectification input, and outgoing side adopts DC capacitor voltage stabilizing.
In order to produce the analog voltage of line voltage, the Converting Unit of described monophase system adopts single-phase PWM inverter circuit to realize, and for the DC voltage that rectifying part is produced, carries out inversion, and DC voltage is converted into and sinusoidal wave equivalent PWM voltage waveform.
The inverter circuit of described Converting Unit is by the turn-on and turn-off of the driving circuit control device of switching device; The brachium pontis output terminal of described Converting Unit connects described filter unit, the higher hamonic wave producing in order to the output of filtering brachium pontis.
For energy conversion unit is controlled, come normal operation and various abnormal work, flickering and the failure condition of simulating grid voltage, and realization and backstage carry out data communication, described inspection and control system comprise connect successively for gathering optical communication interface, data acquisition and treatment circuit, control and testing circuit and fault and the holding circuit of voltage and current signal; Described inspection and control system can carry out data communication with background system.
Described data acquisition and treatment circuit, control and testing circuit and fault and holding circuit form by single chip circuit.
For the electric current of whole system and voltage are detected, described inspection and control system is also connected with some voltage detection units and current detecting unit.
Described some voltage detection units are respectively used to DC voltage and the simulating grid output voltage of the rectifying part output of detection of grid voltage, monophase system; Described some current detecting units are respectively used to detect brachium pontis electric current, simulating grid output current and the three-phase alternating current inductive current of monophase system Converting Unit.
In order to tell about the concrete effect of energy conversion unit, the principle of work of described energy conversion unit is: rectifying part, three-phase alternating current A, B, C three-phase produce DC voltage by three pulse width modulation (PWM) rectification circuits respectively, and at outgoing side via DC capacitor voltage stabilizing; Converting Unit, adopt single-phase PWM inverter circuit, the turn-on and turn-off of the driving circuit control device by switching device, the DC voltage that rectifying part is produced is carried out inversion, be converted into and sinusoidal wave equivalent PWM voltage waveform, and add the above filter unit filtering higher hamonic wave at outgoing side.
It is below specific embodiment.
As shown in Figure 1, the present embodiment system mainly comprises start unit, energy conversion unit, filter unit and inspection and control system; Energy conversion unit comprises rectification link and inversion link, utilize multiple conversion method, by the line voltage of input be converted to amplitude variable size, frequency range is adjustable, comprise higher hamonic wave, can simulate the alternating voltage of three-phase imbalance and simulating grid voltage fluctuation and flickering; Wherein, the function of rectifying part is to convert the grid ac voltage of input to DC voltage, for the Converting Unit of rear class provides galvanic current, presses; The function of Converting Unit is the converting direct-current voltage into alternating-current voltage output that rectification is produced, and carrys out normal operation and various abnormal work, flickering and the failure condition of simulating grid voltage by the control of detection and control module.
As shown in Figure 2, the principle of work of energy conversion unit is as follows:
When original state, isolating switch (QF1) is in off-state, when device need to power on, QF1 is closed, the function that the analog voltage that will realize due to mimic channel comprises higher harmonic components fault, need the subsystem rectification survey of three-phase separate, A, B, C three-phase produce DC voltage by three pulse width modulation (PWM) rectification circuits respectively; Like this, energy conversion unit is comprised of three uniterm systems, a phase of the output simulating grid that each is single-phase, and the circuit structure of every phase system can be divided into rectifying part and Converting Unit; Rectifying part adopts three-phase PWM rectification circuit to realize, and by the line voltage rectification of input, at outgoing side, adopts DC capacitor voltage stabilizing, for Converting Unit below provides galvanic current to press; The three-phase PWM rectification of rectifying part can suitable tested system the energy feedback that produces of active load to electrical network, realize the two-way flow of energy.
Inverter circuit adopts single-phase PWM inverter circuit to realize, inverter circuit is by the turn-on and turn-off of the driving circuit control device of switching device, the DC voltage that rectification circuit is produced is carried out inversion, be converted into the PWM voltage waveform with sinusoidal wave equivalence, the square wave that when brachium pontis of inverter is exported, dutycycle constantly changes, therefore adds that in brachium pontis output low-pass filter is with filtering higher hamonic wave.
As shown in Figure 3, DC voltage, simulating grid output voltage, simulating grid output current and the inductive current of inspection and control system detection of grid voltage, brachium pontis electric current, the output of energy conversion unit rectifying part, by data acquisition and processing, energy conversion unit is controlled, simulate the electrical network situation of various needs, and data communication is carried out on realization and backstage.
Be more than the preferred embodiment of a kind of high-power electrical network voltage analog circuit of the present invention, all changes of doing according to technical solution of the present invention, when the function producing does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (9)
1. a high-power electrical network voltage analog circuit, is characterized in that: comprise start unit, energy conversion unit, filter unit and inspection and control system;
Described start unit comprises resistance and the contactor being connected in parallel, and contactor two ends connect respectively line voltage input and energy conversion unit;
Described energy conversion unit comprises three monophase systems, and each monophase system circuit structure is divided into rectifying part and Converting Unit;
Described inspection and control system, by data acquisition and processing, is controlled energy conversion unit, and data communication is carried out on realization and backstage;
Described energy conversion unit, filter unit and inspection and control system interconnect between any two.
2. high-power electrical network voltage analog circuit according to claim 1, is characterized in that: the rectifying part of described monophase system adopts three-phase PWM rectification circuit to realize, and for the line voltage of rectification input, and outgoing side adopts DC capacitor voltage stabilizing.
3. high-power electrical network voltage analog circuit according to claim 1, it is characterized in that: the Converting Unit of described monophase system adopts single-phase PWM inverter circuit to realize, for the DC voltage that rectifying part is produced, carry out inversion, DC voltage is converted into and sinusoidal wave equivalent PWM voltage waveform.
4. high-power electrical network voltage analog circuit according to claim 3, is characterized in that: the inverter circuit of described Converting Unit is by the turn-on and turn-off of the driving circuit control device of switching device; The brachium pontis output terminal of described Converting Unit connects described filter unit, the higher hamonic wave producing in order to the output of filtering brachium pontis.
5. high-power electrical network voltage analog circuit according to claim 1, is characterized in that: described inspection and control system comprise connect successively for gathering optical communication interface, data acquisition and treatment circuit, control and testing circuit and fault and the holding circuit of voltage and current signal.
6. high-power electrical network voltage analog circuit according to claim 5, is characterized in that: described data acquisition and treatment circuit, control and testing circuit and fault and holding circuit form by single chip circuit.
7. according to high-power electrical network voltage analog circuit described in claim 1 or 6, it is characterized in that: described inspection and control system is also connected with some voltage detection units and current detecting unit.
8. high-power electrical network voltage analog circuit according to claim 7, is characterized in that: described some voltage detection units are respectively used to DC voltage and the simulating grid output voltage of the rectifying part output of detection of grid voltage, monophase system; Described some current detecting units are respectively used to detect brachium pontis electric current, simulating grid output current and the three-phase alternating current inductive current of monophase system Converting Unit.
9. high-power electrical network voltage analog circuit according to claim 1, it is characterized in that: the principle of work of described energy conversion unit is: rectifying part, three-phase alternating current A, B, C three-phase produce DC voltage by three pulse width modulation (PWM) rectification circuits respectively, and at outgoing side via DC capacitor voltage stabilizing; Converting Unit, adopt single-phase PWM inverter circuit, the turn-on and turn-off of the driving circuit control device by switching device, the DC voltage that rectifying part is produced is carried out inversion, be converted into and sinusoidal wave equivalent PWM voltage waveform, and add the above filter unit filtering higher hamonic wave at outgoing side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410002983.2A CN103743931B (en) | 2014-01-03 | 2014-01-03 | A kind of high-power grid voltage simulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410002983.2A CN103743931B (en) | 2014-01-03 | 2014-01-03 | A kind of high-power grid voltage simulation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103743931A true CN103743931A (en) | 2014-04-23 |
| CN103743931B CN103743931B (en) | 2016-06-01 |
Family
ID=50500967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410002983.2A Active CN103743931B (en) | 2014-01-03 | 2014-01-03 | A kind of high-power grid voltage simulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103743931B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764958A (en) * | 2015-04-14 | 2015-07-08 | 国家电网公司 | Testing system of power quality control equipment |
| CN106786532A (en) * | 2016-12-27 | 2017-05-31 | 爱恒能源科技（上海）有限公司 | Electric intelligent optimizes distributor |
| CN107340420A (en) * | 2017-07-19 | 2017-11-10 | 广东美的暖通设备有限公司 | Detecting voltage by three phase circuit and air conditioner |
| CN113054855A (en) * | 2021-03-11 | 2021-06-29 | 机械工业第九设计研究院有限公司 | Source compensation mutual-aid power supply for simulating voltage interference and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950982A (en) * | 2010-09-25 | 2011-01-19 | 合肥工业大学 | Multifunctional power grid simulator and control method thereof |
| CN102231531A (en) * | 2011-06-23 | 2011-11-02 | 中电普瑞科技有限公司 | Wind electric field electrical network voltage disturbance simulation generating device |
| CN102520218A (en) * | 2011-12-06 | 2012-06-27 | 浙江大学 | Programmable trouble power simulator |
| CN202818122U (en) * | 2012-07-30 | 2013-03-20 | 深圳市菊水皇家科技有限公司 | Grid simulator |
| CN203289117U (en) * | 2013-03-21 | 2013-11-13 | 王林兵 | High-efficient rectification and inversion integrated energy feedback system |
| CN203688610U (en) * | 2014-01-03 | 2014-07-02 | 国家电网公司 | Large power grid voltage simulation circuit |
-
2014
- 2014-01-03 CN CN201410002983.2A patent/CN103743931B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950982A (en) * | 2010-09-25 | 2011-01-19 | 合肥工业大学 | Multifunctional power grid simulator and control method thereof |
| CN102231531A (en) * | 2011-06-23 | 2011-11-02 | 中电普瑞科技有限公司 | Wind electric field electrical network voltage disturbance simulation generating device |
| CN102520218A (en) * | 2011-12-06 | 2012-06-27 | 浙江大学 | Programmable trouble power simulator |
| CN202818122U (en) * | 2012-07-30 | 2013-03-20 | 深圳市菊水皇家科技有限公司 | Grid simulator |
| CN203289117U (en) * | 2013-03-21 | 2013-11-13 | 王林兵 | High-efficient rectification and inversion integrated energy feedback system |
| CN203688610U (en) * | 2014-01-03 | 2014-07-02 | 国家电网公司 | Large power grid voltage simulation circuit |
Non-Patent Citations (1)
| Title |
|---|
| 潘贞存等: "电网静态模拟系统的计算机监控", 《电力系统及其自动化学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764958A (en) * | 2015-04-14 | 2015-07-08 | 国家电网公司 | Testing system of power quality control equipment |
| CN106786532A (en) * | 2016-12-27 | 2017-05-31 | 爱恒能源科技（上海）有限公司 | Electric intelligent optimizes distributor |
| CN106786532B (en) * | 2016-12-27 | 2023-11-14 | 爱恒能源科技（上海）有限公司 | Intelligent power optimizing distributor |
| CN107340420A (en) * | 2017-07-19 | 2017-11-10 | 广东美的暖通设备有限公司 | Detecting voltage by three phase circuit and air conditioner |
| CN107340420B (en) * | 2017-07-19 | 2023-11-28 | 广东美的暖通设备有限公司 | Three-phase voltage detection circuit and air conditioner |
| CN113054855A (en) * | 2021-03-11 | 2021-06-29 | 机械工业第九设计研究院有限公司 | Source compensation mutual-aid power supply for simulating voltage interference and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103743931B (en) | 2016-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10734944B2 (en) | Inverter having grid disconnection point and insulation resistance measurement and method for measuring an insulation resistance | |
| CN102520218B (en) | Programmable trouble power simulator | |
| CN106950512B (en) | Energy storage converter grid-connected and grid-disconnected characteristic integrated detection system and method | |
| CN104638963A (en) | Method and apparatus for minimizing a circulating current or a common-mode voltage of an inverter | |
| CN103743931B (en) | A kind of high-power grid voltage simulation circuit | |
| CN104065279A (en) | Voltage disturbance generation device and method for simulating power grid disturbance | |
| CN203617708U (en) | Energy feedback type electronic load | |
| CN104764958A (en) | Testing system of power quality control equipment | |
| CN204886200U (en) | Distribution transformer unbalanced three phase current detection compensation arrangement | |
| CN103840475A (en) | Stepless compensating device and method | |
| CN203688610U (en) | Large power grid voltage simulation circuit | |
| CN102890209A (en) | Continuous current operation testing device of multi-level converter half-bridge type sub-module | |
| CN104934963A (en) | Continuous pulse non-linear load equivalent analog device | |
| KR101384727B1 (en) | A Multifunction device for simulated driving of grid connected system and control method for it | |
| CN201177647Y (en) | Multiple waveform aging test apparatus of lightning arrester | |
| CN204556744U (en) | The detection platform of a kind of APF of 380V electric pressure | |
| CN203166522U (en) | Active harmonic suppression device | |
| CN111865102A (en) | Electronic type analog load system | |
| CN107248821B (en) | Nonlinear load simulation device | |
| CN204495941U (en) | A kind of power quality controlling equipment test system | |
| CN105071667A (en) | Harmonic wave generator and method for detecting elements of power grid via the same | |
| CN203630256U (en) | An energy feedback-type electricity consuming equipment test system | |
| CN204145281U (en) | The Modular electrical flow disturbance circuit for generating of the many level of a kind of unique H full-bridge | |
| CN204231207U (en) | A kind of inversion welding source main loop circuit structure | |
| CN204142867U (en) | High-capacity intelligent expanded type electrical energy power quality disturbance generation systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |