CN102944776A - Moving test system for characteristics of transformer based on single-phase high-voltage variable-frequency power source parallel operation - Google Patents
Moving test system for characteristics of transformer based on single-phase high-voltage variable-frequency power source parallel operation Download PDFInfo
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Abstract
The invention discloses a moving test system for characteristics of a transformer based on single-phase high-voltage variable-frequency power source parallel operation. The moving test system for the characteristic of the extra-capacity transformer based on the single-phase high-voltage variable-frequency power source parallel operation scheme comprises a power source device, an intermediate transformer, a reactive compensation and harmonic filtering device and a measurement control device, wherein output points a and b of the power source device are connected with two sets of input points a1 and b1, and a2 and b2 of the intermediate transformer respectively, and two sets of output points A1 and B1, and A2 and B2 of the intermediate transformer are in parallel connection with two high-voltage compensation and filtering devices HC1 and HC2 of the reactive compensation and harmonic filtering device. The moving test system can meet requirements of testing characteristic parameters (a no-load characteristic, a load characteristic and temperature rise) of the extra-capacity and extra-high-voltage transformer; and as all component parts of the moving test system are fixedly transported by vehicles, the moving test system is convenient to move and use in the field.
Description
Technical field
The present invention relates to a kind of High capacity transformer characterisitic parameter (comprising no-load characteristic, load characteristic and temperature rise test) pilot system, thereby particularly adopt single-phase high voltage variable-frequency power sources parallel operation forecast scheme configuration hicap supply unit to make each parts be suitable for the transformer characteristic nigration system of vehicle-mounted transport.This system is particularly suitable for the on-the-spot characterisitic parameter test of extreme high voltage, High capacity transformer, is convenient to transportation and mobile the use.
Background technology
Be subject to transportation and create conditions, high-capacity or extreme high voltage transformer all adopt single-phase form (i.e. three-phase transformer of three single-phase formations), and common payment user after erecting stage assembling and test.Raising along with the line voltage grade, the capacity of this type of transformer is increasing, also increasing to its demand of single phase poaer supply capacity of carrying out attribute testing, often reach ten the number in addition more than tens of megavolt-amperes, existing test power device such as synchronous genset, high-voltage regulator and low-voltage variable frequency power supply all are difficult to meet the demands.
New test supply unit high-voltage variable frequency power source, its capacity can be sufficiently large, can satisfy the attribute testing demand of above-mentioned single-phase high-capacity or extreme high voltage transformer.But for ten megavolt-amperes and above jumbo single-phase high voltage variable-frequency power sources, because volume, weight and size are all very large, conventional traffic condition can't meet the demands.And on the high-voltage variable frequency power source inner structure, as take it is split to adapt to the words of the processing mode of traffic condition, then reasonably the position is between phase-shifting transformer and the power cell, but need to connect a large amount of wires between this two, and all be in the noble potential line, will there be many potential safety hazards in on-the-spot installation, and workload is huge, with the decrease reliability and stability, should not adopt.
Summary of the invention
The technical matters that the present invention mainly solves provides the transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources parallel operation, it can satisfy the nigration system of high-capacity, extreme high voltage transformer characteristic parameter (no-load characteristic, load characteristic and temperature rise) test, all component parts of this system are convenient to mobile and on-the-spot the use by vehicle-mounted fixedly transportation.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the transformer characteristic nigration system that the parallel operation of a kind of single-phase high voltage variable-frequency power sources is provided, should comprise supply unit based on the High capacity transformer characteristic nigration system of single-phase high voltage variable-frequency power sources parallel operation scheme, intermediate transformer, reactive-load compensation and harmonic filtering installation and measuring and controlling, the output point a of described supply unit, b is connected respectively to two groups of input point a1 of intermediate transformer, b1 and a2, b2, two groups of output point A1 of intermediate transformer, B1 and A2, B2 is parallel with respectively two groups of high pressure compensation filter HC1 and the HC2 of reactive-load compensation and harmonic filtering installation, two groups of output point A1 of intermediate transformer, B1 and A2, B2 is connected respectively to two groups of input point c1 of the voltage sampling device of measuring and controlling, d1 and c2, d2,2 output points of voltage sampling device are parallel with voltage table V1 and V2, voltage table V1, V2 is connected to measuring and controlling, and measuring and controlling is connected to supply unit.
Preferably, output point a, the b of described supply unit also are parallel with the low-voltage compensation filter LC of reactive-load compensation and harmonic filtering installation.
Preferably, described measuring and controlling also comprises current sampling device, and current sampling device is connected respectively to two output point B1 and the A2 of intermediate transformer, and current sampling device also is connected with measuring and controlling.
Preferably, described supply unit comprises the single-phase high voltage variable-frequency power sources (HVC) of three parallel connections.
The invention has the beneficial effects as follows: the transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources of the present invention parallel operation, can satisfy the nigration system of high-capacity, extreme high voltage transformer characteristic parameter (no-load characteristic, load characteristic and temperature rise) test, all component parts of this system are convenient to mobile and on-the-spot the use by vehicle-mounted fixedly transportation.
Description of drawings
Fig. 1 is the structural representation of a preferred embodiment of the transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources of the present invention parallel operation.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, thereby so that the advantage of invention and feature can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
See also Fig. 1, the embodiment of the invention comprises:
The transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources parallel operation, should comprise supply unit (1) based on the High capacity transformer characteristic nigration system of single-phase high voltage variable-frequency power sources parallel operation scheme, intermediate transformer (2), reactive-load compensation and harmonic filtering installation (3) and measuring and controlling (4), described supply unit (1) comprises the single-phase high voltage variable-frequency power sources (HVC) of three parallel connections, the output point a of described supply unit (1), b is connected respectively to two groups of input point a1 of intermediate transformer (2), b1 and a2, b2, two groups of output point A1 of intermediate transformer (2), B1 and A2, B2 is parallel with respectively two groups of high pressure compensation filter (32) HC1 and the HC2 of reactive-load compensation and harmonic filtering installation (3), two groups of output point A1 of intermediate transformer (2), B1 and A2, B2 is connected respectively to two groups of input point c1 of the voltage sampling device (41) of measuring and controlling (4), d1 and c2, d2,2 output points of voltage sampling device (41) are parallel with voltage table V1 and V2, voltage table V1, V2 is connected to measuring and controlling (4), and measuring and controlling (4) is connected to supply unit (1);
Output point a, the b of described supply unit (1) also is parallel with the low-voltage compensation filter LC 32 of reactive-load compensation and harmonic filtering installation (3);
Described measuring and controlling (4) also comprises current sampling device (42), and current sampling device (42) is connected respectively to two output point B1 and the A2 of intermediate transformer (2), and current sampling device (42) also is connected with measuring and controlling (4).
Pilot system as shown in Figure 1, it comprises three single-phase high voltage variable-frequency power sourcess (HVC) as system power supply device (1), is used for two intermediate transformers (2), reactive-load compensation and the harmonic filtering installation (3) (containing low-voltage compensation filter (31) and high pressure compensation filter (32)) of adaptive tested transformer test voltage, and measuring and controlling (4).Wherein voltage sampling device (TV) (41) and current sampling device (42) are subordinated to measuring and controlling (4) system.
System power supply device (1) is made of three identical single-phase high voltage variable-frequency power sourcess of parameter.Three variable-frequency power sources parallel operation operations realize cascade communication and synchro control by the parallel operation control line between each variable-frequency power sources.Every variable-frequency power sources all can work independently, and during test, according to the capacity of required power supply, also can only use wherein one or two variable-frequency power sources parallel operation, and in case of necessity, the quantity that also can increase the variable-frequency power sources parallel operation enlarges the capacity of system power supply device.Like this, the capacity relative of each variable-frequency power sources is less, volume, apparent size and weight are unlikely excessive, be easy to realize vehicle-mounted, by the mode of many variable-frequency power sources parallel operation, capacity that namely can the separate unit less comes the required huge capacity of realization system, and that integral body still is suitable for is vehicle-mounted, be easy to move, conveniently carry out site test.
Described single-phase high voltage variable-frequency power sources, input and output are the high voltage of 3kV to 10kV grade, the load-bearing capacity that power supply capacity and used means of transport are looked required in concrete voltage selection.Be input as three-phase, be output as single-phase.Because input, output are high voltage, the separate unit capacity can reach several million to tens of megavolt-amperes, and by parallel operation, when being convenient to mobile transportation, can satisfy the large capacity test power supply requirement of High capacity transformer attribute testing.
The variable-frequency power sources output port arranges wave filter, reduces the rate of change (dV/dt) of many level of variable-frequency power sources phase shift modulation principle output voltage, improves the parallel operation condition, further reduces simultaneously the output distortion degree, makes its correlation test requirement that is content with very little.
By the driving of control variable-frequency power sources power cell, realize testing required output voltage and the independent regulation of frequency, also can according to artificial setting, realize the related adjusting of voltage and frequency.
Intermediate transformer as shown in Figure 1 (2), be single-phase step-up transformer, depending on its weight, size and volume, it can be the form of separate unit or many and usefulness, thereby can satisfy the vehicle-mounted transport condition, be convenient to mobile the use, and realize required output capacity, electric pressure and Voltage-output pattern reduce its manufacture difficulty and cost simultaneously.
Described intermediate transformer (2) input, output can be provided with a plurality of windings and voltage tap, by changing connecting mode and the voltage tap of winding, can obtain multiple no-load voltage ratio, thereby export different magnitudes of voltage with the trial voltage requirement of the tested transformer that satisfies the multiple voltage grade.
Described reactive-load compensation and harmonic filtering installation (3), comprise low-voltage compensation filter (31) and high pressure compensation filter (32) two parts, can jointly be formed by linear and non-linear two class compensation filter devices, actual required according to test, can partly or entirely adopt.Cause mostly is discrete parts, and capacity relative is less, and volume, size and weight are little, are easy to vehicle-mounted transport.
Described measuring and controlling (4), volume is small, is easy to integrated and displacement.Measuring and controlling can be by the transmission mode of wireless (bluetooth or Wifi network) or wired (optical fiber or 485 interfaces), realization shows the Long-distance Control of supply unit (high-voltage variable frequency power source) and state and information, and experimental measurement data and result are processed, shown and storage etc.Long-distance Control can effectively be avoided directly the limitation of operate high pressure supply unit nearby, simultaneously security and the comfortableness of lifting test.
The transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources of the present invention parallel operation, the transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources of the present invention parallel operation, can satisfy the nigration system of high-capacity, extreme high voltage transformer characteristic parameter (no-load characteristic, load characteristic and temperature rise) test, all component parts of this system are convenient to mobile and on-the-spot the use by vehicle-mounted fixedly transportation.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (4)
1. the transformer characteristic nigration system of single-phase high voltage variable-frequency power sources parallel operation, it is characterized in that: should comprise supply unit based on the High capacity transformer characteristic nigration system of single-phase high voltage variable-frequency power sources parallel operation scheme, intermediate transformer, reactive-load compensation and harmonic filtering installation and measuring and controlling, the output point a of described supply unit, b is connected respectively to two groups of input point a1 of intermediate transformer, b1 and a2, b2, two groups of output point A1 of intermediate transformer, B1 and A2, B2 is parallel with respectively two groups of high pressure compensation filter HC1 and the HC2 of reactive-load compensation and harmonic filtering installation, two groups of output point A1 of intermediate transformer, B1 and A2, B2 is connected respectively to two groups of input point c1 of the voltage sampling device of measuring and controlling, d1 and c2, d2,2 output points of voltage sampling device are parallel with voltage table V1 and V2, voltage table V1, V2 is connected to measuring and controlling, and measuring and controlling is connected to supply unit.
2. the transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources according to claim 1 parallel operation, it is characterized in that: output point a, the b of described supply unit also is parallel with the low-voltage compensation filter LC of reactive-load compensation and harmonic filtering installation.
3. the transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources according to claim 1 parallel operation, it is characterized in that: described measuring and controlling also comprises current sampling device, current sampling device is connected respectively to two output point B1 and the A2 of intermediate transformer, and current sampling device also is connected with measuring and controlling.
4. the transformer characteristic nigration system of a kind of single-phase high voltage variable-frequency power sources according to claim 1 parallel operation, it is characterized in that: described supply unit comprises the single-phase high voltage variable-frequency power sources (HVC) of three parallel connections.
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Cited By (4)
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| CN103543361A (en) * | 2013-10-31 | 2014-01-29 | 国家电网公司 | Frequency-conversion voltage-regulation on-site no-load test method for large extra-high voltage transformer |
| CN103558469A (en) * | 2013-10-31 | 2014-02-05 | 国家电网公司 | Large transformer no-load test method adopting filter compensation technique |
| CN105044492A (en) * | 2015-06-24 | 2015-11-11 | 温州大学 | Low-voltage electrical complete switch equipment temperature rise test system |
| CN110058063A (en) * | 2019-05-17 | 2019-07-26 | 国网江苏省电力有限公司电力科学研究院 | A kind of high capacity variable-frequency power sources parallel operation control system |
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| CN103543361A (en) * | 2013-10-31 | 2014-01-29 | 国家电网公司 | Frequency-conversion voltage-regulation on-site no-load test method for large extra-high voltage transformer |
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| CN105044492A (en) * | 2015-06-24 | 2015-11-11 | 温州大学 | Low-voltage electrical complete switch equipment temperature rise test system |
| CN105044492B (en) * | 2015-06-24 | 2018-04-10 | 温州大学 | A kind of low-voltage electrical switchgear assembly temperature rise test system |
| CN110058063A (en) * | 2019-05-17 | 2019-07-26 | 国网江苏省电力有限公司电力科学研究院 | A kind of high capacity variable-frequency power sources parallel operation control system |
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