CN101345485A - Simulation power supply of four-quadrant electric network - Google Patents
Simulation power supply of four-quadrant electric network Download PDFInfo
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- CN101345485A CN101345485A CN 200810021855 CN200810021855A CN101345485A CN 101345485 A CN101345485 A CN 101345485A CN 200810021855 CN200810021855 CN 200810021855 CN 200810021855 A CN200810021855 A CN 200810021855A CN 101345485 A CN101345485 A CN 101345485A
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Abstract
The invention discloses an analog power of a four-quadrant power network comprising a three-bridge inverting main circuit and a drive circuit. The three-bridge inverting main circuit comprises a two-terminal three-bridge circuit, a dc unit circuit is connected between the two-terminal three-bridge circuit, a reactor and an isolating transformer are respectively connected to the two-terminal three-bridge circuit, a lower control unit is connected to the three-bridge inverting main circuit, the reactor and the isolating transformer and a host computer control unit is a liquid crystal management unit. The analog power of the invention provides signals with different type parameters for each special function detection of a grid-connected inverter and the inverter types to be detected relate to multiple single-phase and three-phase inverters such as a power frequency isolating type, a non-isolating type and a high frequency isolating type. Furthermore the analog power of the power network adopts the four-quadrant power instead of the usual two-quadrant power in order to adapting the saving-energy development trend. The energy fed back by the inverter is transformed to an ac electricity and fed back to the power network instead of consuming the energy on the power network analog power.
Description
Technical field:
The present invention relates to a kind of parallel network power generation device electrical network analogue means.
Background technology:
Along with in the global range to the craving for of generation of electricity by new energy, the scale of parallel network power generation also enlarges rapidly, constantly has various types of photovoltaic inversion products to introduce to the market, and what follow that product occurs simultaneously is exactly the design and the research and development of inverter testing equipment.
A quality product really up to the mark must just can be introduced to the market through strict testing process; and the testing process precondition of science is to possess perfect test platform; the grid-connected photovoltaic inverter is because its product its own particularity; must link to each other with electrical network when testing; test its generate electricity by way of merging two or more grid systems function and defencive function; especially defencive function relates to overvoltage, under-voltage, overfrequency, under-frequency, anti-island effect detection etc.Test event is of a great variety, if there is not perfect test platform, then need multiple tester, and test process is numerous and diverse.In addition, because the rigidity effect of electrical network, and when test, may have big harmonic wave, the accuracy that whether can realize and measure test event has all proposed challenge.For simplifying testing process, realize required test event, improve measuring accuracy, propose exploitation and be fit to photovoltaic combining inverter test electrical network analog power.
Summary of the invention:
The object of the present invention is to provide a kind of rational in infrastructure, when the test inverter, be connected to electrical network by the electrical network analog power, rather than directly inverter is connected to electrical network, the electrical network analog power can carry out filtering to electrical network, simultaneously regulate various electric network parameters continuously, reach the simulation power supply of four-quadrant electric network of the purpose of the every performance index of test inverter accurately, easily according to predefined program.
Technical solution of the present invention is:
A kind of simulation power supply of four-quadrant electric network, it is characterized in that: comprise three full bridge inverter main circuits, drive circuit, three full bridge inverter main circuits comprise two ends three bridge circuits, be connected to the direct current element circuit between three bridge circuits of two ends, two ends three bridge circuits are connected with reactor, isolating transformer respectively, lower floor's control unit is connected with three full bridge inverter main circuits, reactor, isolating transformer, and the PC control unit is the liquid crystal administrative unit.
Described lower floor control unit comprises the controller that is connected with three full bridge inverter main circuits, controller and two ends measure, synchronously, protected location is connected, two ends measure, synchronous, protected location is connected with reactor, isolating transformer respectively.
The direct current element circuit by multichannel in twos series capacitance circuit circuit in parallel again form.Be parallel with grading resistor on each electric capacity.
Drive circuit is the pwm pulse driver element that has defencive function.
The present invention can detect each specific function of combining inverter provides all kinds parameter different signals, and tested inverter kind relates to multiple single-phase, three-phase inverters such as power frequency isolated form, non-isolation type, high-frequency isolation type.In addition, in order to adapt to energy-conservation development trend, the electrical network analog power adopts four-quadrant, but not common two-phase limit, changes the energy of inverter fed into alternating current and feeds back to electrical network, rather than consume on the electrical network analog power.Of the present invention designing and developing provides reliably for the photovoltaic DC-to-AC converter of seriation detects, test platform accurately, the quality of the product that guarantees to dispatch from the factory.
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the configuration diagram of one embodiment of the invention.
Fig. 2 is a zero cross detection circuit.
Fig. 3 is the communicating circuit figure between analog power circuit of the present invention and liquid-crystal controller.
Fig. 4 is liquid-crystal controller and upper machine communication circuit diagram.
Embodiment:
A kind of simulation power supply of four-quadrant electric network, comprise three full bridge inverter main circuits, drive circuit, three full bridge inverter main circuits comprise two ends three bridge circuits 1,2, be connected to direct current element circuit 3 between three bridge circuits of two ends, two ends three bridge circuits are connected with reactor 4, isolating transformer 5 respectively, lower floor's control unit is connected with three full bridge inverter main circuits 1,2, reactor 4, isolating transformer 5, the PC control unit is the liquid crystal administrative unit, and the host computer unit mainly is to set control command and Control Parameter setting.
Described lower floor control unit comprises the controller 6 that is connected with three full bridge inverter main circuits, controller and two ends measure, synchronously, protected location 7,8 is connected, two ends measure, synchronous, protected location is connected with reactor 4, isolating transformer 5 respectively.
The direct current element circuit by multichannel in twos series capacitance circuit circuit in parallel again form.Cause pressure drop difference on the series capacitance for preventing that capacitor leakage current is inconsistent, can also be parallel with grading resistor on each electric capacity.
Drive circuit is the pwm pulse driver element that has defencive function.
Lock unit is sent into zero cross detection circuit by the sampling of grid side voltage transformer, by the frequency square wave synchronizing signal the same with system frequency of LM311 output 3.3V, sends into DSP then and carries out the zero passage judgement.
The protected location circuit mainly comprise the direct current overvoltage with under-voltage, exchange overvoltage, direct current overcurrent, alternating current overcurrent, IGBT driving malfunction, controller failure etc., fault-signal all links to each other with DSP control by optical fiber, increases its reliability and antijamming capability.When fault-signal is handled, it is divided into recovers fault and self recovery fault certainly, wherein direct current overvoltage, overcurrent, IGBT driving malfunction, controller failure are for can not recover fault certainly, in case the fault generator controller is sent out locking pulse, after this controller is no longer handled this type of fault-signal, can only can restart after reporting to the police, checking; Direct current is under-voltage, exchange overvoltage etc. be the self recovery fault, and these fault generator controllers are also sent out locking pulse, but after this controller keep supervision to this type of fault-signal, fault to eliminate afterwards controller can return to normal operating condition.
The measuring unit circuit mainly comprises direct voltage, alternating voltage, direct current and alternating current modulate circuit, record AC side three-phase current instantaneous value and DC side current instantaneous value by Hall current sensor, nurse one's health the electric pressure that is fit to through discharge circuit again, send into the ADC module of DSP.In like manner, direct voltage, three-phase alternating voltage instantaneous value are also by sending into the ADC module of DSP after instrument transformer and the discharge circuit conditioning.
The controller unit circuit is as the core of hardware control system circuit, because the TMS320F2812 digital signal processor has that processing speed is fast, operational precision is high, good reliability and characteristics such as easy to maintenance, so sample it as the hardware control system core in the design.
Adopt 485 communication modes between this electrical network analog power control circuit and liquid-crystal controller, transmission, reception and controller signals are all by the 6N136 light-coupled isolation.Utilize MAX485 as communication interface chip, MAX485 is a kind of difference balanced type low-power transceiving chip, and employing+5V power supply is exclusively used in the conversion between TTL agreement and 485 agreements.
Liquid-crystal controller adopts ARM7 to control, and selects RS232 with upper machine communication, or the RS485 mode, and RAM7 can realize embedded system, is convenient to the exploitation of systemic-function expansion, accessories of a product.For avoiding the phase mutual interference, realize isolating by optocoupler.
Claims (5)
1, a kind of simulation power supply of four-quadrant electric network, it is characterized in that: comprise three full bridge inverter main circuits, drive circuit, three full bridge inverter main circuits comprise two ends three bridge circuits, be connected to the direct current element circuit between three bridge circuits of two ends, two ends three bridge circuits are connected with reactor, isolating transformer respectively, lower floor's control unit is connected with three full bridge inverter main circuits, reactor, isolating transformer, and the PC control unit is the liquid crystal administrative unit.
2, simulation power supply of four-quadrant electric network according to claim 1; it is characterized in that: described lower floor control unit comprises the controller that is connected with three full bridge inverter main circuits; controller and two ends measure, synchronously, protected location is connected, two ends measure, synchronous, protected location is connected with reactor, isolating transformer respectively.
3, simulation power supply of four-quadrant electric network according to claim 1 is characterized in that: the direct current element circuit by multichannel in twos series capacitance circuit circuit in parallel again form.
4, simulation power supply of four-quadrant electric network according to claim 3 is characterized in that: be parallel with grading resistor on each electric capacity.
5, according to claim, 2,3 or 4 described simulation power supply of four-quadrant electric network, it is characterized in that: drive circuit is the pwm pulse driver element that has defencive function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810021855 CN101345485A (en) | 2008-08-21 | 2008-08-21 | Simulation power supply of four-quadrant electric network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810021855 CN101345485A (en) | 2008-08-21 | 2008-08-21 | Simulation power supply of four-quadrant electric network |
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| CN101345485A true CN101345485A (en) | 2009-01-14 |
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| CN 200810021855 Pending CN101345485A (en) | 2008-08-21 | 2008-08-21 | Simulation power supply of four-quadrant electric network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037469A (en) * | 2017-10-23 | 2018-05-15 | 上海科梁信息工程股份有限公司 | Aircraft power supply characteristic test system and method |
| CN114172166A (en) * | 2021-12-07 | 2022-03-11 | 阳光电源股份有限公司 | Voltage generating device and high-frequency generation control method thereof |
| CN114244172A (en) * | 2021-12-03 | 2022-03-25 | 合肥科威尔电源系统股份有限公司 | Power grid simulation power supply and use method thereof |
-
2008
- 2008-08-21 CN CN 200810021855 patent/CN101345485A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037469A (en) * | 2017-10-23 | 2018-05-15 | 上海科梁信息工程股份有限公司 | Aircraft power supply characteristic test system and method |
| CN108037469B (en) * | 2017-10-23 | 2020-06-16 | 上海科梁信息工程股份有限公司 | Airplane power supply characteristic testing system and method |
| CN114244172A (en) * | 2021-12-03 | 2022-03-25 | 合肥科威尔电源系统股份有限公司 | Power grid simulation power supply and use method thereof |
| CN114244172B (en) * | 2021-12-03 | 2023-06-20 | 科威尔技术股份有限公司 | Power grid analog power supply |
| CN114172166A (en) * | 2021-12-07 | 2022-03-11 | 阳光电源股份有限公司 | Voltage generating device and high-frequency generation control method thereof |
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Open date: 20090114 |