CN102411102B - System and method for power examination test of large-power rectifier - Google Patents
System and method for power examination test of large-power rectifier Download PDFInfo
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- CN102411102B CN102411102B CN 201110216707 CN201110216707A CN102411102B CN 102411102 B CN102411102 B CN 102411102B CN 201110216707 CN201110216707 CN 201110216707 CN 201110216707 A CN201110216707 A CN 201110216707A CN 102411102 B CN102411102 B CN 102411102B
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Abstract
The invention discloses a system and a method for a power examination test of a large-power rectifier. The system comprises an electric network source, a voltage regulator, a high-voltage low current testing device, and a low-voltage heavy current testing device. The high-voltage low current testing device includes a first transformer, a rectifier, and an impedance load. And the low-voltage heavycurrent testing device consists of a second transformer, a rectifier, and a diverter load. The electric network source is connected with the voltage regulator; an output terminal of the voltage regulator is selectably connected with a first transformer or a second transformer; alternating current input terminals of the rectifiers are selectably connected with an output terminal of the first transformers or the second transformers; and direct current output terminals of the rectifiers are selectably connected with the impedance load or the diverter load. The method comprises two steps: a high-voltage low current test and a low-voltage heavy current test. According to the system and the method in the invention, a working characteristic examination requirement of a large-power rectifier is met; the testing quality is ensured; efficiency is improved; operation steps are simplified; equipment costs are saved; and an operation potential safety hazard is reduced.
Description
Technical field
The present invention relates to a kind of current transformer test macro and method thereof, especially relate to a kind of system and method thereof that is applied to the power certification test that dispatches from the factory of heavy-duty rectifier.
Background technology
Along with the develop rapidly of China's Semiconductor Converting Technology, the power rectifier technology is more and more wider in the application popularization rate in the fields such as D.C. high voltage transmission, industrial frequency transformer (rectification link), DC MOTOR CONTROL; Its power is also increasing, and the rectifier of MW class is very common in the industry at present.The principle of work of heavy-duty rectifier is to utilize silicon cell (comprising the power electronic devices such as thyristor, diode, GTO, IGBT) that the unidirectional of electricity become single-phase or three phase sine interchange (AC) electric current into stably one direction direct current (DC) electric current output by the rectification silicon cell by characteristic.The direction of alternating current itself is periodically variable in time, and the unilateral conduction of silicon cell can only be passed through along single direction its electric current, thereby makes sense of current unified, reciprocal electric current is filtered, thereby reach the effect of rectification.
Rectifier is distinguished from control mode, is broadly divided into 3 types:
● full-controlled rectifier device (mainly adopting controlled thyristor, GTO, IGBT etc. as the core current device);
● half-control rectifier (mainly adopting controlled thyristor and uncontrollable diode combinations as the core current device);
● uncontrollable rectifier (mainly adopting uncontrollable diode etc. as the core current device).
If distinguish from the main circuit topological structure of rectifier, be broadly divided into following 7 kinds of main Types:
● single-phase (three-phase) half-wave rectifier;
● single-phase (three-phase) full wave rectifier;
● single-phase (three-phase) bridge rectifier;
● three-phase thyristor bridge cophase counter parallel connection rectifier;
● double reverse-stars type band paralleing reactor controlled rectifier;
● double reverse-stars type band paralleing reactor whole circuit cophase counter parallel connection controlled rectifier (Δ/Y ⊥ Y+Y ⊥ Y);
● polyphase rectifier (poly phase rectification can significantly reduce higher harmonic current, reduces the pollution to electrical network).
Dispatch from the factory current power examination of rectifier mainly is large electric current to the logical certain hour of main circuit of rectifier, in order to verify that rectifier is in that whether stable and whether the temperature rise situation is stable pass in the large current work situation electric current output.In order to ensure stablizing of quality and performance behind the product export, manufacturer generally all needs rectifier is carried out the current power examination test of certain hour.And at present, although be not quite similar for the dispatch from the factory mode of building and the wire examination method of current power examination test macro of rectifier on the market, basic system topology is mostly identical.The dispatch from the factory topology diagram of power checking system of typical two level Large Power rectifiers and these two kinds of basic rectifiers of three level Large Power rectifiers in the prior art as depicted in figs. 1 and 2.Among the figure, the power certification test system of two level Large Power rectifiers comprises: electric network source 1, pressure regulator 2, two winding transformers 3, two level Large Power rectifier and DC load.The power certification test system of three level Large Power rectifiers comprises: electric network source 1, pressure regulator 2, three-winding transformer 4, three level Large Power rectifiers and two groups of DC load.At present dispatch from the factory power certification test system and test method Main Problems of general heavy-duty rectifier is that examination power is large in the industry.
For example: 1 input voltage is 3AC690V, and capacity S is that the current power certification test power consumption of the rectifier of 1MVA is calculated.
Rectification output dc voltage: U
DC=1.35U ≈ 1.35 * 690=932V
Specified output DC electric current: I
DC=S/U
DC=1000000 ÷ 932=1073A
The examination electric current calculates by 1.2 times of rated current: I=1.2I
DC=1.2 * 1073 ≈ 1288A
As reference current power examination load, its examination power is take loaded impedance as 0.05 Ω:
P＝I
2R＝1288×1288×0.05≈83KW
Therefore, from the foregoing, the various heavy-duty rectifier power certification test system and methods of prior art mainly exist following shortcoming:
(1) pure resistor load Assessment: the waste of its thermal value and electric energy is all very large; The heat that produces in the simultaneously examination process also needs to distribute timely, and the construction of cooling system has also indirectly increased the cost that the test checking system is built.
(2) power-supply system build the cost height: powerful examination, certainly will need large power supply to power, the large power, electrically origin system build cost very high (such as the common 1.5MVA power-supply system of a cover, it builds cost probably needs about 800,000).
(3) if adopt uncontrollable (or full gate is put) rectifier system to carry out the current power examination, because input voltage is low, so High-current output of load end, certainly will also need the large electric current input of experiment power supply system, so also just virtually the configuration capacity of experiment power supply system is had higher requirement the increase that has also just again caused equipment cost to drop into.
(4) to towing back to the feedback Assessment: build the cost costliness, floor area is large, maintenance and maintenance is complicated, cost is high, if do not have absolute profit margin as support, basically can not adopt.
(5) have potential safety hazard: the large power, electrically origin system must relate to high voltage and large electric current, and its various safety prevention measures also just must put in place accordingly.
Summary of the invention
The purpose of this invention is to provide a kind of heavy-duty rectifier power certification test system and method thereof, this system and method thereof can overcome that prior art pilot system and method cost thereof are expensive, the maintenance maintenance is complicated, have the technical matters such as potential safety hazard, operating characteristic and the check requirements of heavy-duty rectifier have been satisfied well, guarantee test mass, promoted testing efficiency, saved the equipment investment cost, reduced test safety hidden danger, also realized simultaneously energy-saving and emission-reduction.
The present invention specifically provides the technic relization scheme of a kind of heavy-duty rectifier power certification test system, a kind of heavy-duty rectifier power certification test system, comprise: electric network source, pressure regulator, the high voltage-small current proving installation, the low-voltage, high-current proving installation, described high voltage-small current proving installation comprises the first transformer, rectifier, impedance load, described low-voltage, high-current proving installation comprises the second transformer, rectifier, shunt, electric network source links to each other with pressure regulator, the output terminal of pressure regulator selectively links to each other with the first transformer or the second transformer, the ac input end of rectifier selectively links to each other with the output terminal of the first transformer or the second transformer, and the dc output end of rectifier selectively links to each other with impedance load or shunt.
As the further improvement of a kind of heavy-duty rectifier power of the present invention certification test systems technology scheme, impedance load is the little current loading of high impedance, and shunt is little impedance large current load.The first transformer also further is the high voltage-small current transformer, and the second transformer further is low voltage heavy current transformer.Rectifier further is two level rectifiers or three level rectifiers or the above multi-level rectifier of three level.
The present invention also provides a kind of technic relization scheme of heavy-duty rectifier power certification test method in addition, and a kind of method of utilizing above-mentioned heavy-duty rectifier power certification test system to carry out heavy-duty rectifier power certification test may further comprise the steps:
High voltage-small current testing procedure: the main circuit and the operation circuit that connect rectifier, and at rectifier DC output terminal connection impedance load, output voltage size by the control pressure regulator is regulated the output voltage of the first transformer to rectifier power supply, should make the electronic power convertor spare of rectifier be in as much as possible full gate in the process of the test and put conducting state, guarantee simultaneously impedance load by galvanic current stream (recommending excess current about 10A), and make rectifier keep the steady-working state of certain hour;
Low-voltage, high-current testing procedure: the main circuit and the operation circuit that connect rectifier, and at rectifier DC output terminal connection shunt, regulate the size of the second transformer output voltage comes to rectifier power supply by the size of control pressure regulator output voltage, should make the electronic power convertor spare of rectifier be in as much as possible full gate in the process of the test and put conducting state, regulate the output voltage of the second transformer by the voltage of control pressure regulator output, while is along with the increase of the second transformer output voltage, the excess current of the load bridging device of rectifier also increases thereupon, be adjusted to till the test examination current value size always, after the large current lead-through of load is stable, make rectifier keep the steady-working state of certain hour.
Further improvement as a kind of heavy-duty rectifier power of the present invention certification test method and technology scheme, in the process of carrying out the high voltage-small current testing procedure, the temperature rise stable case of the input voltage of monitoring rectifier and output current Parameter stability and each parts and parts connector reaches the criterion of the high voltage-small current power check requirements that dispatches from the factory as rectifier; In the process of carrying out the low-voltage, high-current testing procedure, the temperature rise stable case of the input voltage of monitoring rectifier and output current Parameter stability and each parts and parts connector reaches the criterion of the low-voltage, high-current power check requirements that dispatches from the factory as rectifier.
As the further improvement of a kind of heavy-duty rectifier power of the present invention certification test method and technology scheme, in the process of carrying out the low-voltage, high-current testing procedure, the electronic power convertor spare of rectifier should be in full gate as far as possible and put conducting state.
As the further improvement of a kind of heavy-duty rectifier power of the present invention certification test method and technology scheme, in the high voltage-small current testing procedure, recommend to make rectifier keep 10～20 minutes steady-working state; In the low-voltage, high-current testing procedure, recommend to make rectifier keep 20～40 minutes steady-working state.As a kind of more excellent embodiment, in the high voltage-small current testing procedure, make rectifier keep 15 minutes steady-working state; In the low-voltage, high-current testing procedure, make rectifier keep 30 minutes steady-working state.Certainly, also can require suitably improve examination grade in these test processs according to the actual performance of rectifier.
As the further improvement of a kind of heavy-duty rectifier power of the present invention certification test method and technology scheme, in the high voltage-small current testing procedure, the output voltage of regulating the first transformer reaches 1.1 times of rectifier rated voltage to rectifier power supply; In the low-voltage, high-current testing procedure, adjusting test examination current value reaches 1.2 times of rectifier rated current.
By implementing the technical scheme of the invention described above a kind of heavy-duty rectifier power certification test system and method thereof, can reach following technique effect:
(1) the functional structure simplicity of design, the equipment investment cost is low, reliability is high, practical application stability is high;
(2) energy-saving and emission-reduction reduce the test operation potential safety hazard, the input of Decrease production cost;
(3) pilot system examination coverage rate height has been guaranteed the power certification test system of dispatching from the factory of this cover heavy-duty rectifier and test method can put to test and every examination of on-the-spot practical application;
(4) satisfy operating characteristic and the check requirements of heavy-duty rectifier, guaranteed test mass, promoted testing efficiency, simplified laboratory technician's Getting Started Steps threshold;
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the topology diagram of prior art two level rectifier power certification test systems;
Fig. 2 is the topology diagram of prior art three level rectifier power certification test systems;
Fig. 3 is the topology diagram of a kind of heavy-duty rectifier power of the present invention certification test system and method two level rectifier power certification test system thereof;
Fig. 4 is the topology diagram of a kind of heavy-duty rectifier power of the present invention certification test system and method three level rectifier power certification test systems thereof;
Wherein: the 1-electric network source, the 2-pressure regulator, 3-two winding transformers, 4-three-winding transformer, DUT-rectifier, the RD-DC load, TM1, TM4-pressure regulator, TM2, TM5-the first transformer, TM3, TM6-the second transformer, RD1, RD3, RD4-impedance load, RD2, RD5, RD6-shunt.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Shown in accompanying drawing 3 and accompanying drawing 4, provided the specific embodiment that a kind of heavy-duty rectifier power of the present invention certification test system and method thereof are applied to two level and three level rectifier power certification tests, the invention will be further described below in conjunction with the drawings and specific embodiments.
The embodiment of a kind of heavy-duty rectifier power certification test system as shown in Figure 3 and Figure 4, comprise: electric network source, pressure regulator, the high voltage-small current proving installation, the low-voltage, high-current proving installation, described high voltage-small current proving installation comprises the first transformer, rectifier, impedance load, described low-voltage, high-current proving installation comprises the second transformer, rectifier, shunt, electric network source links to each other with pressure regulator, the output terminal of pressure regulator selectively links to each other with the first transformer or the second transformer, the ac input end of rectifier selectively links to each other with the output terminal of the first transformer or the second transformer, and the dc output end of rectifier selectively links to each other with impedance load or shunt.Impedance load further is the little current loading of high impedance, and shunt further is little impedance large current load.The first transformer further is the high voltage-small current transformer, and the second transformer further is low voltage heavy current transformer.Rectifier further is two level rectifiers or three level rectifiers or the above multi-level rectifier of three level.
The described heavy-duty rectifier of the specific embodiment of the invention dispatches from the factory power certification test system according to the operating characteristic of heavy-duty rectifier and the power check requirements that dispatches from the factory, and the power certification test method of will dispatching from the factory is divided into low-voltage, high-current testing procedure and two parts of high voltage-small current testing procedure.Be described below by typical two level Large Power rectifiers and these two kinds of basic rectifiers of three level Large Power rectifiers power checking system functional topological structure figure that dispatches from the factory, its systemic-function topological structure as shown in Figure 3 and Figure 4.
The purpose of high voltage-small current testing procedure is: give the heavy-duty rectifier input rated voltage, and connect in DC terminal and can keep the stable miniwatt impedance load of output dc voltage, with the withstand voltage ability of examination rectifier electronic power convertor spare, capacitive device, induction reactance device, impedance device etc., and the electrical insulation properties between each device of interiors of products etc.
As shown in Figure 3, relevant main circuit and the operation circuit of test specimen two level Large Power rectifiers (powerful rectifier DUT) connected, connect the suitable little current loading of high impedance.The first transformer TM2 output voltage of regulating high voltage-small current by the output voltage size of control pressure regulator TM1 reaches the rated voltage (be recommended as load voltage value 1.1 times) of tested powerful rectifier DUT to rectifier DUT power supply, should make the electronic power convertor spare of rectifier be in as much as possible full gate in the process of the test and put conducting state.The impedance load RD1 that also will further guarantee the little electric current of high impedance (recommends load over-current to be controlled at about 10A by galvanic current stream, specifically stabilize to reference value with test specimen output DC flow valuve), and make tested powerful rectifier DUT keep this steady-working state a period of time that (generalized case is 10～20 minutes, recommendation is about 15 minutes, certainly, also require suitably to improve the examination grade according to the actual performance of rectifier).Simultaneously, should note monitoring input voltage and output current parameter stability and the obviously fluctuation of nothing of rectifier DUT in the certification test process, the stable criterion that reaches the high voltage-small current power check requirements that dispatches from the factory as tested heavy-duty rectifier that waits of each parts temperature rise situation.
As shown in Figure 4, relevant main circuit and the operation circuit of test specimen three level Large Power rectifiers connected, connect the suitable little current loading of high impedance.The first transformer TM5 output voltage of regulating high voltage-small current by the output voltage size of control pressure regulator TM4 reaches the rated voltage (be recommended as load voltage value 1.1 times) of tested powerful rectifier DUT to rectifier DUT power supply, should make the electronic power convertor spare of rectifier be in as much as possible full gate in the process of the test and put conducting state.Impedance load RD3 or the RD4 that also will further guarantee the little electric current of high impedance (recommend load over-current to be controlled at about 10A by galvanic current stream, specifically stabilize to reference value with test specimen output DC flow valuve), and make tested powerful rectifier DUT keep this steady-working state a period of time that (generalized case is 10～20 minutes, recommendation is about 15 minutes, certainly, also require suitably to improve the examination grade according to the actual performance of rectifier).Simultaneously, should note monitoring input voltage and output current parameter stability and the obviously fluctuation of nothing of rectifier DUT in the certification test process, the stable criterion that reaches the high voltage-small current power check requirements that dispatches from the factory as tested heavy-duty rectifier that waits of each parts temperature rise situation.
The purpose of low-voltage, high-current testing procedure is: with the DC terminal load of shunt as rectifier, to less input voltage of heavy-duty rectifier input, and make electronic power convertor spare be in as much as possible full gate to put conducting state, with guarantee the DC load end greatly electric current pass through; With the current characteristics of examination rectifier electronic power convertor spare, induction reactance device, parts connector etc., and the stability etc. of temperature rise situation in the examination process.
As shown in Figure 3, relevant main circuit and the operation circuit of test specimen two level Large Power rectifiers connected, connect suitable shunt (little impedance large current load) as the examination load.Regulate the size of the second transformer TM3 output voltage of low-voltage, high-current comes to tested powerful rectifier DUT power supply by the size of control pressure regulator TM1 output voltage; Simultaneously, should make the electronic power convertor spare of rectifier DUT be in as much as possible full gate in the process of the test and put conducting state.Regulate the output voltage of the second transformer TM3 by the voltage of control pressure regulator TM1 output, while is along with the increase of the second transformer TM3 output voltage, the excess current of the load bridging device RD2 of tested rectifier DUT also increases thereupon, and (general control at 1.2 times of rated current size till being adjusted to the current value size of test examination always; Certainly, as long as tested rectifier performance allows, that also electric current can be done is larger, and the maximum examination electric current in the specific embodiment of the invention can be accomplished 8000A).After the large current lead-through of shunt load is stable, make tested powerful rectifier DUT keep this steady-working state a period of time that (generalized case is 20～40 minutes, recommendation is about 30 minutes, and certainly, also the actual performance according to rectifier requires suitably to improve the examination grade).Simultaneously, should note monitoring the input voltage, output current parameter stability of rectifier DUT in the examination process without obvious fluctuation, each parts and parts connector temperature rise situation are stable etc. reaches the criterion of the low-voltage, high-current power check requirements that dispatches from the factory as tested heavy-duty rectifier.In the low-voltage, high-current testing procedure, select shunt as the low-voltage, high-current load of rectifier, although shunt also is a kind of impedance device, but its voltage and current characteristic is different from conventional high-power resistance, the current stabilization performance of shunt is better, pressure drop lower (conventional high-power resistance is difficult to hold electric current in the very low situation of voltage).
As shown in Figure 4, relevant main circuit and the operation circuit of test specimen three level Large Power rectifiers connected, connect suitable shunt (little impedance large current load) as the examination load.Regulate the size of the second transformer TM6 output voltage of low-voltage, high-current comes to tested powerful rectifier DUT power supply by the size of control pressure regulator TM4 output voltage; Simultaneously, should make the electronic power convertor spare of rectifier DUT be in as much as possible full gate in the process of the test and put conducting state.Regulate the output voltage of the second transformer TM6 by the voltage of control pressure regulator TM4 output, while is along with the increase of the second transformer TM6 output voltage, the load bridging device RD5 of tested rectifier DUT or the excess current of RD6 also increase thereupon, are adjusted to till the current value size of test examination always.After the large current lead-through of shunt load is stable, make tested powerful rectifier DUT keep this steady-working state a period of time that (generalized case is 20～40 minutes, recommendation is about 30 minutes, and certainly, also the actual performance according to rectifier requires suitably to improve the examination grade).
The described heavy-duty rectifier power of specific embodiment of the invention certification test system and method test principle thereof are as described below.
In the high voltage-small current testing procedure, be in as much as possible full gate with the electronic power convertor spare of tested powerful rectifier DUT in the process of the test and put conducting state; Now take the input voltage of tested heavy-duty rectifier as three-phase alternating current, output DC stream 10A is example.
Rectification output dc voltage: U
DC=1.35U
Output DC electric current: I
DC=P/U
DC=P/1.35U=10
Tested rectifier examination power: P=10 * 1.35U=13.5U
Annotate: U-represents the input voltage of tested rectifier DUT.
In the low-voltage, high-current testing procedure, be in as much as possible full gate with the electronic power convertor spare of tested powerful rectifier DUT in the process of the test and put conducting state, the load bridging device is 75mV/4000A; Now take examination electric current 4000A as example.
Rectification output dc voltage: U
DC=I
DC* 75mV/4000A
Tested rectifier load examination power: P=U
DC* I
DC=I
DC* I
DC* 75mV/4000A
＝4000×4000×0.075/4000＝300W
Annotate: I
DCThe tested rectifier DUT power examination of-expression output current.
Because can produce certain pressure drop above the electronic power convertor spare in the tested heavy-duty rectifier, induction reactance device, the impedance device etc.; Simultaneously, because the pressure drop of load direct current is very little, so the ratio regular meeting of the upper generation of tested rectifier DUT pressure drop is higher, so the load of 300W examination power is the whole consumed power of pilot system (different rectification main circuit topological structure certainly not, its pressure drop difference also can be larger, therefore also causes theoretical calculating to be difficult to control).But, to can finding out the verification experimental verification of the present invention, to compare with conventional power examination, its examination power still has the obvious order of magnitude to descend (probably be less than conventional examination power 1/5).
Although heavy-duty rectifier power certification test system and method for the present invention is divided for high voltage-small current test macro and step and low-voltage, high-current test macro and step two part, on the surface pilot system and method more complex, but unforeseeable technique effect but brought thus.
At first, on experiment system design, because the overall system capacity demand has obtained the decline (capacity requirement that has is reduced to 1/5 of former demand, even higher) of the order of magnitude, so naturally also will reduce greatly the cost of building of pilot system.Secondly, volume lowering, the volume of equipment also can descend naturally, so also just can save out many test spaces.
On test method, at first, although because high voltage-small current testing procedure electric pressure is high, electric current is little; So can select the smaller wire of wire diameter to carry out the connection of main circuit, so also just can simplify and make things convenient for the wiring operation, reduce setting up time, can also suitably reduce simultaneously the potential safety hazard in the operating process.
Secondly, although low-voltage, high-current testing procedure On current is very large, pressure drop is very little; Because On current is very large, so need the wire of selecting wire diameter very large in the process of the test, cause the attended operation more complicated, but potential safety hazard has been stopped in little pressure drop (the DUT input voltage generally can be controlled in the 10V), naturally also can alleviate operating personnel's mental burden, improve operating efficiency.Simultaneously, because the voltage of low-voltage, high-current testing procedure is very low, examination power is also very little, (conventional methods is because pressure drop is large so in the situation that the rectifier performance allows electric current is suitably done greatly, be limited by the impact of experiment power supply finite capacity, it is very large that general electric current can not be done), so also just within the same examination time, also improved the examination grade, this also just can accomplish to save out a part of examination time in the situation of equal check requirements.
The present invention can reach following technique effect:
(1) the functional structure simplicity of design, the equipment investment cost is low, reliability is high, practical application stability is high;
(2) energy-saving and emission-reduction reduce the test operation potential safety hazard, the input of Decrease production cost;
(3) pilot system examination coverage rate height has been guaranteed the power certification test system of dispatching from the factory of this cover heavy-duty rectifier and test method can put to test and every examination of on-the-spot practical application;
(4) satisfy operating characteristic and the check requirements of heavy-duty rectifier, guaranteed test mass, promoted testing efficiency, simplified laboratory technician's Getting Started Steps threshold.
Heavy-duty rectifier power certification test system and method for the present invention also is applicable to the power examination test of dispatching from the factory of many level (more than three level) rectifier, also is applicable to the power examination test of dispatching from the factory of rectification module simultaneously.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, be equal to replacements, equivalence changes and modify, all still belong in the scope that technical solution of the present invention protects.
Claims (7)
1. heavy-duty rectifier power certification test system, it is characterized in that: comprise electric network source, pressure regulator, the high voltage-small current proving installation, the low-voltage, high-current proving installation, described high voltage-small current proving installation comprises the first transformer, rectifier, impedance load, described low-voltage, high-current proving installation comprises the second transformer, rectifier, the shunt load, electric network source links to each other with pressure regulator, the output terminal of pressure regulator selectively links to each other with the first transformer or the second transformer, the ac input end of rectifier selectively links to each other with the output terminal of the first transformer or the second transformer, selectively link to each other with impedance load or the shunt load output terminal of described the first transformer of the dc output end of rectifier selectively links to each other with described impedance load by described rectifier, and the output terminal of described the second transformer selectively links to each other with described shunt load by described rectifier; Described impedance load is the little current loading of high impedance, and described shunt load is little impedance large current load; Described the first transformer is the high voltage-small current transformer, and described the second transformer is low voltage heavy current transformer; Described rectifier is two level rectifiers or the above multi-level rectifier of three level.
2. a method of utilizing heavy-duty rectifier power certification test claimed in claim 1 system to carry out heavy-duty rectifier power certification test is characterized in that, may further comprise the steps:
High voltage-small current testing procedure: the main circuit and the operation circuit that connect rectifier, and at rectifier DC output terminal connection impedance load, output voltage size by the control pressure regulator is regulated the output voltage of the first transformer to rectifier power supply, should make the electronic power convertor spare of rectifier be in as much as possible full gate in the process of the test and put conducting state, guarantee that simultaneously impedance load flows by galvanic current, and make rectifier keep the steady-working state of certain hour;
Low-voltage, high-current testing procedure: the main circuit and the operation circuit that connect rectifier, and at rectifier DC output terminal connection shunt, regulate the size of the second transformer output voltage comes to rectifier power supply by the size of control pressure regulator output voltage, regulate the output voltage of the second transformer by the voltage of control pressure regulator output, while is along with the increase of the second transformer output voltage, the excess current of the load bridging device of rectifier also increases thereupon, be adjusted to till the test examination current value size always, after the large current lead-through of load is stable, make rectifier keep the steady-working state of certain hour.
3. a kind of heavy-duty rectifier power certification test method according to claim 2, it is characterized in that: in the process of carrying out the high voltage-small current testing procedure, the temperature rise stable case of the input voltage of monitoring rectifier and output current Parameter stability and each parts and parts connector reaches the criterion of the high voltage-small current power check requirements that dispatches from the factory as rectifier; In the process of carrying out the low-voltage, high-current testing procedure, the temperature rise stable case of the input voltage of monitoring rectifier and output current Parameter stability and each parts and parts connector reaches the criterion of the low-voltage, high-current power check requirements that dispatches from the factory as rectifier.
4. a kind of heavy-duty rectifier power certification test method according to claim 3, it is characterized in that: in the process of carrying out the low-voltage, high-current testing procedure, the electronic power convertor spare of described rectifier should be in as much as possible full gate and put conducting state.
5. according to claim 2, the described a kind of heavy-duty rectifier power certification test method of arbitrary claim in 3,4, it is characterized in that: in described high voltage-small current testing procedure, make rectifier keep 10～20 minutes steady-working state, and require suitably to improve the examination grade according to the actual performance of rectifier; In described low-voltage, high-current testing procedure, make rectifier keep 20～40 minutes steady-working state, and require suitably to improve the examination grade according to the actual performance of rectifier.
6. a kind of heavy-duty rectifier power certification test method according to claim 5, it is characterized in that: in described high voltage-small current testing procedure, the output voltage of regulating the first transformer reaches 1.1 times of rectifier rated voltage to rectifier power supply, and requires suitably to improve the examination grade according to the actual performance of rectifier; In described low-voltage, high-current testing procedure, adjusting test examines current value to 1.2 times of the rectifier rated current, and requires suitably to improve the examination grade according to the actual performance of rectifier.
7. a kind of heavy-duty rectifier power certification test method according to claim 5, it is characterized in that: in described high voltage-small current testing procedure, make under the specified examination voltage of rectifier and keep 15 minutes steady-working state, and require suitably to improve the examination grade according to the actual performance of rectifier; In described low-voltage, high-current testing procedure, make rectifier under specified examination electric current, keep 30 minutes steady-working state, and require suitably to improve the examination grade according to the actual performance of rectifier.
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| CN108627716B (en) * | 2017-03-22 | 2021-08-31 | 株洲中车时代电气股份有限公司 | Method for analyzing detection coverage rate of whole process of converter |
| CN109991515B (en) * | 2019-04-09 | 2021-11-30 | 国网四川省电力公司电力科学研究院 | Method and system for acquiring primary large current under low actual load |
| CN114720779B (en) * | 2022-05-10 | 2024-02-27 | 北京全路通信信号研究设计院集团有限公司 | Phase-controllable bow net offline electromagnetic disturbance simulation system and test method |
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