CN210181130U - Loss testing device of water-cooling flexible direct current conversion module - Google Patents
Loss testing device of water-cooling flexible direct current conversion module Download PDFInfo
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- CN210181130U CN210181130U CN201920850071.9U CN201920850071U CN210181130U CN 210181130 U CN210181130 U CN 210181130U CN 201920850071 U CN201920850071 U CN 201920850071U CN 210181130 U CN210181130 U CN 210181130U
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000001816 cooling Methods 0.000 title claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 19
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- 239000002826 coolant Substances 0.000 abstract description 8
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Abstract
The utility model relates to a loss testing arrangement of gentle direct conversion of current module of water-cooling belongs to electrical automation equipment technical field. In the device, the direct current side of the flexible direct current accompanying module is connected with an alternating current power grid for supplying power through an adjustable direct current power supply, the positive end of the alternating current side of the flexible direct current tested module is connected with the positive end of the alternating current side of the flexible direct current accompanying module through a hedging reactor, the negative end of the alternating current side of the flexible direct current tested module is connected with the negative end of the alternating current side of the flexible direct current accompanying module, and the direct current side of the flexible direct current tested module is suspended; water cooling system links to each other with gentle straight examination module of accompanying and gentle straight module of being tested respectively through oral siphon and outlet pipe, and the main control board passes through optic fibre and links to each other with gentle straight examination module of accompanying and gentle straight module of being tested respectively. This device is through measuring the heat that the water-cooling medium was taken away, and the gentle straight loss of being surveyed the module of water-cooling is measured to the equivalence, the utility model discloses testing arrangement does not receive the distortion degree influence of wave form, receives sensor precision to influence for a short time, and consequently the measuring accuracy is higher.
Description
Technical Field
The utility model relates to a loss testing arrangement of gentle direct conversion of current module of water-cooling belongs to electrical automation equipment technical field.
Background
The flexible direct current transmission has wide application prospect in the working fields of regional power grid interconnection, renewable energy source grid connection, island power supply and the like, and is one of important development directions of medium-high voltage high-power equipment in the future. Most of the main circuits of the flexible dc power transmission equipment currently adopt a Modular Multilevel Converter (MMC) mode, and the main loss of the complete equipment lies in the flexible dc Converter valve. The flexible-direct current converter valve is formed by cascading a plurality of flexible-direct current conversion modules, the flexible-direct current conversion modules are one of key components of flexible-direct current transmission equipment, efficiency optimization, component selection and radiator design can be guided by accurate loss calculation, analysis and measurement of the flexible-direct current conversion modules, and the flexible-direct current converter valve is an important link in the design of a complete set of converter valves.
Chinese patent CN201720535445 discloses a novel loss detection device for an MMC converter valve, which comprises a voltage transformer, a current clamp, a metering module, a subtracter and the like, and is used for measuring the electric energy of alternating current and direct current sides respectively, and obtaining the overall loss of the converter valve by performing a difference value on the electric energy and the electric energy, wherein in the testing device, the loss measurement accuracy is greatly influenced by the phase accuracy of a measurement instrument, and a patent CN201510264086 also adopts a similar loss measurement device. The heat dissipation mode of the flexible direct current conversion module mainly comprises two modes, one mode is forced air cooling, convection is formed through a fan, heat dissipated during the working process of the module is taken away, and the other mode is water cooling, and the heat dissipated during the working process of the module is taken away through water pump circulation. The patent CN201710802490 discloses a device and a method for measuring loss power of a converter, which obtains the loss power of the converter in a heater power equivalent manner by monitoring temperatures of an air inlet pipe and an air outlet pipe, and these testing devices and methods are all for a flexible-direct current conversion module adopting an air cooling structure, and there is no device for testing loss of the flexible-direct current conversion module aiming at a water cooling structure in the prior art.
Disclosure of Invention
The utility model aims at providing a loss test device of gentle straight conversion of current module of water-cooling improves existing loss test device's structure, obtains the loss of being surveyed the module through measuring the heat that cooling medium took away.
The utility model provides a loss testing device of a water-cooling flexible direct current conversion module, which comprises an adjustable direct current power supply, a flexible direct current test module, a flexible direct current tested module, a hedging reactor, a set of water-cooling system and a main control board; the direct current side of the flexible direct current accompanying testing module is connected with an alternating current power grid for supplying power through an adjustable direct current power supply, the positive end of the alternating current side of the flexible direct current tested module is connected with the positive end of the alternating current side of the flexible direct current accompanying testing module through a hedging reactance, the negative end of the alternating current side of the flexible direct current tested module is connected with the negative end of the alternating current side of the flexible direct current accompanying testing module, and the direct current side of the flexible direct current tested module is suspended;
the water cooling system is respectively connected with the flexible straight accompanying module and the flexible straight tested module through a water inlet pipe and a water outlet pipe, a water inlet temperature sensor and a flow sensor are arranged on the water inlet pipe between the water cooling system and the flexible straight accompanying module, and a water outlet pipeline temperature sensor is arranged on the water outlet pipe between the water cooling system and the flexible straight accompanying module; the water cooling system respectively provides cooling water circulation for the flexible and straight accompanying module and the flexible and straight tested module, and takes away heat generated in the working process of the flexible and straight accompanying module and the flexible and straight tested module;
the main control board is respectively connected with the module control board on the flexible and straight accompanying module and the module control board on the flexible and straight tested module through optical fibers, the optical fibers realize two-way communication for one receiving and one sending, the module on the flexible and straight accompanying module controls output pulses and is connected to a power device of the flexible and straight accompanying module through the drive board, and the module on the flexible and straight module controls output pulses and is connected to the power device of the flexible and straight module to be tested through the drive board; the main control board comprises a touch screen, a tester sets working voltage and working current through the interface of the touch screen, the main control board issues instructions to the flexible direct accompanying module and the flexible direct tested module, the module control boards on the flexible direct accompanying module and the flexible direct tested module respectively start the flexible direct accompanying module and the flexible direct tested module to work, the module control board of the flexible direct accompanying module receives the instructions of the main control board to generate real-time pulses of power devices in the flexible direct accompanying module, the module control board of the flexible direct tested module receives the instructions of the main control board to generate real-time pulses of the power devices in the flexible direct tested module, so that the voltage value of the adjustable direct current power supply is the rated direct current voltage value of the accompanying module, the flexible starting direct accompanying module and the flexible direct tested module perform hedging tests, namely, the amplitude and the phase of the voltage output of the two modules are controlled, and current forms a loop in the accompanying module and the tested module, the two modules have the same current and opposite directions; adjusting parameters of the hedging test to enable the flexible and straight module to work under a rated current working condition, observing changes of a water inlet pipeline temperature sensor and a water outlet pipeline temperature sensor, recording a temperature value and a flow value after thermal stabilization, and calculating heat taken away by a water cooling system according to the recorded temperature value and flow value to obtain loss of the flexible and straight module.
The utility model discloses a loss test device of water-cooling gentle straight change current module, its advantage is, the utility model discloses a loss test device to water-cooling gentle straight change current module is proposed for the first time, because all losses of water-cooling gentle straight change current module can distribute with the thermal mode finally; the loss testing device of the water-cooling flexible direct-current conversion module equivalently measures the loss of the water-cooling flexible direct-current tested module by measuring the heat taken away by the water-cooling medium; the utility model discloses testing arrangement does not receive the distortion degree influence of wave form, and it is little influenced by the sensor precision, therefore measuring accuracy is higher.
Drawings
Fig. 1 is the utility model provides a loss testing arrangement of gentle direct current conversion module of water-cooling's structure schematic diagram.
Fig. 2 is a main circuit diagram of the soft-dc converter module in the loss testing apparatus of the water-cooled soft-dc converter module shown in fig. 1.
Fig. 3 is a connection relationship between the main control board and two flexible modules according to an embodiment of the present invention.
Detailed Description
The utility model provides a loss testing device of a water-cooling flexible direct current conversion module, the structure of which is shown in figure 1 and comprises an adjustable direct current power supply, a flexible direct current testing module, a flexible direct current tested module, a hedging reactor, a set of water-cooling system and a main control board; the direct current side of the flexible direct current accompanying testing module is connected with an alternating current power grid for supplying power through an adjustable direct current power supply, the positive end of the alternating current side of the flexible direct current tested module is connected with the positive end of the alternating current side of the flexible direct current accompanying testing module through a hedging reactance, the negative end of the alternating current side of the flexible direct current tested module is connected with the negative end of the alternating current side of the flexible direct current accompanying testing module, and the direct current side of the flexible direct current tested module is suspended;
the water cooling system is respectively connected with the flexible straight accompanying module and the flexible straight tested module through a water inlet pipe and a water outlet pipe, a water inlet temperature sensor and a flow sensor are arranged on the water inlet pipe between the water cooling system and the flexible straight accompanying module, and a water outlet pipeline temperature sensor is arranged on the water outlet pipe between the water cooling system and the flexible straight accompanying module; the water cooling system respectively provides cooling water circulation for the flexible and straight accompanying module and the flexible and straight tested module, and takes away heat generated in the working process of the flexible and straight accompanying module and the flexible and straight tested module;
the main control board is respectively connected with the module control board on the flexible and straight accompanying module and the module control board on the flexible and straight tested module through optical fibers, the optical fibers realize two-way communication for one receiving and one sending, the module on the flexible and straight accompanying module controls output pulses and is connected to a power device of the flexible and straight accompanying module through the drive board, and the module on the flexible and straight module controls output pulses and is connected to the power device of the flexible and straight module to be tested through the drive board; the main control board comprises a touch screen, a tester sets working voltage and working current through the interface of the touch screen, the main control board issues instructions to the flexible direct accompanying module and the flexible direct tested module, the module control boards on the flexible direct accompanying module and the flexible direct tested module respectively start the flexible direct accompanying module and the flexible direct tested module to work, the module control board of the flexible direct accompanying module receives the instructions of the main control board to generate real-time pulses of power devices in the flexible direct accompanying module, the module control board of the flexible direct tested module receives the instructions of the main control board to generate real-time pulses of the power devices in the flexible direct tested module, so that the voltage value of the adjustable direct current power supply is the rated direct current voltage value of the accompanying module, the flexible starting direct accompanying module and the flexible direct tested module perform hedging tests, namely, the amplitude and the phase of the voltage output of the two modules are controlled, and current forms a loop in the accompanying module and the tested module, the two modules have the same current and opposite directions; adjusting parameters of the hedging test to enable the flexible and straight module to work under a rated current working condition, observing changes of a water inlet pipeline temperature sensor and a water outlet pipeline temperature sensor, recording a temperature value and a flow value after thermal stabilization, and calculating heat taken away by a water cooling system according to the recorded temperature value and flow value to obtain loss of the flexible and straight module.
The utility model provides an among the loss testing arrangement of the gentle straight current conversion module of water-cooling, gentle straight accompanying and testing module and gentle straight being tested the module and all can adopting half-bridge module or full-bridge module, adopt the half-bridge module in this embodiment, its main circuit structure is as shown in figure 2. The IGBT model is 5SNA2000K 451300; the impulse reactance is 185 uH; the water cooling adopts a 50kW closed water cooling system; the measurement error of the adopted temperature sensor is not higher than 1%; the flow sensor used was a turbine flow meter. The rated direct current rated voltage of the flexible direct current conversion module is 2000V, and the rated current is 1400A. The adjustable direct current power supply is AC380V/2500VDC, 380V in input, 0-2500V in output and 50KW in capacity.
The main control board of the device is connected with the accompanying module control board through a pair of optical fibers, and the optical fibers realize two-way communication by receiving and sending one optical fiber; the main control board is connected with the tested module control board through another pair of optical fibers, and the optical fibers realize two-way communication for one receiving and one sending. The flexible straight test accompanying module control board is one part of the flexible straight test accompanying module, pulses output by the flexible straight test accompanying module control board are connected to a power device of the test accompanying module through the drive board, the flexible straight tested module control board is one part of the flexible straight tested module, and the pulses output by the flexible straight test accompanying module control board are connected to the power device of the tested module through the drive board, as shown in fig. 3.
The utility model provides a loss testing arrangement of gentle direct conversion of current module of water-cooling, its operation process as follows:
1) the voltage value output by the adjustable direct-current power supply is adjusted to the rated direct-current voltage value of the accompanying module, the accompanying module and the tested module are started to carry out a hedging test, the amplitude and the phase of the voltage output by the two modules are controlled, so that the current forms a loop in the accompanying module and the tested module, and the current of the two modules has the same size and opposite direction. And adjusting parameters of the hedging test to enable the flexible and straight tested module to work under the rated current working condition.
2) And observing the changes of the water inlet pipeline temperature sensor and the water outlet pipeline temperature sensor, and recording the temperature value and the flow value after thermal stabilization.
3) The module loss is calculated according to the following formula:
P1＝CpQρ(T1-T2)
wherein:
Cp-specific heat of the cooling medium in kJ/(kg.k);
q-flow of cooling medium, unit is m 3/s;
rho-density of cooling medium, unit kg/m 3;
T1-the temperature of the cooling medium outlet conduit temperature sensor, in K;
T2the temperature of the coolant inlet line temperature sensor, in K.
Claims (1)
1. A loss test device of a water-cooling flexible direct current conversion module is characterized by comprising an adjustable direct current power supply, a flexible direct current accompanying test module, a flexible direct current tested module, a hedging reactor, a set of water-cooling system and a main control board; the direct current side of the flexible direct current accompanying testing module is connected with an alternating current power grid for supplying power through an adjustable direct current power supply, the positive end of the alternating current side of the flexible direct current tested module is connected with the positive end of the alternating current side of the flexible direct current accompanying testing module through a hedging reactance, the negative end of the alternating current side of the flexible direct current tested module is connected with the negative end of the alternating current side of the flexible direct current accompanying testing module, and the direct current side of the flexible direct current tested module is suspended;
the water cooling system is respectively connected with the flexible straight accompanying module and the flexible straight tested module through a water inlet pipe and a water outlet pipe, a water inlet temperature sensor and a flow sensor are arranged on the water inlet pipe between the water cooling system and the flexible straight accompanying module, and a water outlet pipeline temperature sensor is arranged on the water outlet pipe between the water cooling system and the flexible straight accompanying module; the water cooling system respectively provides cooling water circulation for the flexible and straight accompanying module and the flexible and straight tested module, and takes away heat generated in the working process of the flexible and straight accompanying module and the flexible and straight tested module;
the main control board is respectively connected with the module control board on the flexible and straight accompanying module and the module control board on the flexible and straight tested module through optical fibers, the optical fibers realize two-way communication for one receiving and one sending, the module on the flexible and straight accompanying module controls output pulses and is connected to a power device of the flexible and straight accompanying module through the drive board, and the module on the flexible and straight module controls output pulses and is connected to the power device of the flexible and straight module to be tested through the drive board; the main control board comprises a touch screen, a tester sets working voltage and working current through the interface of the touch screen, the main control board issues instructions to the flexible direct accompanying module and the flexible direct tested module, the module control boards on the flexible direct accompanying module and the flexible direct tested module respectively start the flexible direct accompanying module and the flexible direct tested module to work, the module control board of the flexible direct accompanying module receives the instructions of the main control board to generate real-time pulses of power devices in the flexible direct accompanying module, the module control board of the flexible direct tested module receives the instructions of the main control board to generate real-time pulses of the power devices in the flexible direct tested module, so that the voltage value of the adjustable direct current power supply is the rated direct current voltage value of the accompanying module, the flexible starting direct accompanying module and the flexible direct tested module perform hedging tests, namely, the amplitude and the phase of the voltage output of the two modules are controlled, and current forms a loop in the accompanying module and the tested module, the two modules have the same current and opposite directions; adjusting parameters of the hedging test to enable the flexible and straight module to work under a rated current working condition, observing changes of a water inlet pipeline temperature sensor and a water outlet pipeline temperature sensor, recording a temperature value and a flow value after thermal stabilization, and calculating heat taken away by a water cooling system according to the recorded temperature value and flow value to obtain loss of the flexible and straight module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920850071.9U CN210181130U (en) | 2019-06-06 | 2019-06-06 | Loss testing device of water-cooling flexible direct current conversion module |
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| CN201920850071.9U CN210181130U (en) | 2019-06-06 | 2019-06-06 | Loss testing device of water-cooling flexible direct current conversion module |
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| CN210181130U true CN210181130U (en) | 2020-03-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610392A (en) * | 2020-05-13 | 2020-09-01 | 上海宏力达信息技术股份有限公司 | Cascade power module test system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610392A (en) * | 2020-05-13 | 2020-09-01 | 上海宏力达信息技术股份有限公司 | Cascade power module test system and method |
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Granted publication date: 20200324 |