CN215932045U - Test device for primary and secondary fusion equipment of power distribution network - Google Patents
Test device for primary and secondary fusion equipment of power distribution network Download PDFInfo
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- CN215932045U CN215932045U CN202122330715.1U CN202122330715U CN215932045U CN 215932045 U CN215932045 U CN 215932045U CN 202122330715 U CN202122330715 U CN 202122330715U CN 215932045 U CN215932045 U CN 215932045U
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Abstract
A test device for primary and secondary fusion equipment of a power distribution network comprises a three-phase current source, a three-phase voltage source, a current transformer connected with the three-phase current source, and a step-up transformer connected with the three-phase voltage source; the current input end and the current output end of the secondary side of the current transformer are respectively connected with two ends of the tested object; the voltage output end of the secondary side of the boosting transformer is connected with the current input end of the secondary side of the current transformer, the voltage of the secondary side of the boosting transformer is input to the secondary side of the current transformer, and the potential of the secondary side of the current transformer is raised to 10kV to ensure normal sampling of a voltage transformer in a primary-secondary fusion switch. The utility model is used as a test device for a secondary fusion switch, a distribution transformer, a station terminal DTU, a feeder terminal FTU and a distribution transformer terminal TTU, and applies 10kV working voltage and 200A-1000A alternating current during the test. The true type test of the primary and secondary power distribution network fusion equipment can be completed, and guarantee is provided for the operation safety of the primary and secondary power distribution network fusion equipment.
Description
Technical Field
The utility model relates to the inspection and test of equipment such as a primary and secondary fusion switch of a power distribution network, a distribution transformer, a station terminal DTU, a feeder terminal FTU, a distribution transformer terminal TTU, a fault indicator and the like of a power system and a factory and mine enterprise, in particular to a test device of primary and secondary fusion equipment of the power distribution network.
Background
The power distribution network is an important component of a power system and is a key link for ensuring that power is received and sent out, the power distribution network directly faces users and is distributed in all aspects of social production and life, the power distribution network is largest in scale, most widely distributed and diversified in the whole power system, and high-quality reliable power supply of the power distribution network is directly related to power utilization safety of the users, social and economic coordinated development and social harmony.
The debugging and the test of the primary and secondary fusion equipment of the power distribution network are important measures for ensuring the safe operation of the power distribution network. In the past, because proper test equipment is not available, true tests under the conditions of rated voltage, rated current and rated power factors cannot be completed in time, whether current, voltage and electric energy alternating current sampling of a DTU, an FTU and a TTU is normal or not cannot be found in time, hidden dangers in the aspects of secondary circuit wiring errors, weak insulation and the like cannot be found in time, and difficulty is caused in the correct operation of primary and secondary fusion equipment of a power distribution network.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problem, the technical scheme provides a test device for primary and secondary fusion equipment of a power distribution network, and the problem is effectively solved.
The utility model is realized by the following technical scheme:
a test device for primary and secondary fusion equipment of a power distribution network comprises a three-phase current source, a three-phase voltage source, a current transformer connected with the three-phase current source, and a step-up transformer connected with the three-phase voltage source; the current input end and the current output end of the secondary side of the current transformer are respectively connected with two ends of a tested object; the voltage output end of the secondary side of the boosting transformer is connected with the current input end of the secondary side of the current transformer, the voltage of the secondary side of the boosting transformer is input to the secondary side of the current transformer, the potential of the secondary side of the current transformer is raised, and normal sampling of a voltage transformer in a tested device is guaranteed.
Further, the current transformer is provided with 3 current transformers, each LBA、LBBAnd LBC(ii) a 3 current transformers LBA、LBBAnd LBCThe primary sides of the three-phase current source are respectively connected with the output ends of three-phase current sources, and 3 current transformers LBA、LBBAnd LBCAre respectively connected with a tested device DLA、DLBAnd DLC。
Further, the current output by the secondary side of the current transformer is 0-1000A, and the current of 0-1000A is connected to the devices DLA and DL to be testedBAnd DLCPerforming the following steps; device under test DLA、DLBAnd DLCA two-shot fusion switch is used.
Furthermore, the step-up transformer is provided with 3 sets of YBA、YBBAnd YBC(ii) a 3 step-up transformer YBA、YBBAnd YBCThe primary sides of the three-phase boosting transformers YB are respectively connected with the output ends of three-phase voltage sourcesA、YBBAnd YBCThe voltage output ends of the secondary sides are respectively connected with a current transformer LBA、LBBAnd LBCThe current input end of the secondary side is connected.
Further, the secondary side of the boosting transformer outputs 0-10 kV voltage to the secondary side of the current transformer, and the potential of the secondary side of the current transformer is raised, so that normal sampling of a voltage transformer in the tested device is guaranteed.
Furthermore, 10kV voltage is output to the secondary side of the current transformer by the secondary side of the boosting transformer, and the potential of the secondary side of the current transformer is raised to 10kV, so that normal sampling of the voltage transformer in the tested device is guaranteed.
Furthermore, the current transformer is made of high-insulation materials, in the current transformer, the insulation level of the secondary side to the iron core is more than or equal to 10kV, and the insulation level of the secondary side to the primary side is more than or equal to 10 kV.
Advantageous effects
Compared with the prior art, the test device for the primary and secondary fusion equipment of the power distribution network has the following beneficial effects:
(1) the technical scheme combines a three-phase current source, a three-phase voltage source, a current transformer and a step-up transformer to be used as a secondary fusion switch, a distribution transformer, a station terminal DTU, a feeder terminal FTU and a distribution transformer terminal TTU test device, and 10kV working voltage and 200A-1000A alternating current are applied during the test. The implementation method for completing the true type test of the primary and secondary power distribution network fusion equipment is achieved, and guarantee is provided for the operation safety of the primary and secondary power distribution network fusion equipment.
(2) According to the technical scheme, rated voltage, rated current and rated power factors are applied to a tested product through the three-phase current source and the three-phase voltage source, the phase between the current and the voltage is adjusted, whether current, voltage and electric energy sampling of a station terminal DTU, a feeder terminal FTU and a distribution transformer terminal TTU is normal or not can be found in time, and hidden dangers such as wiring errors and unqualified insulation of a secondary circuit of the power distribution network can be found in time, so that safe operation of the power distribution network is guaranteed.
(3) The technical scheme has the advantages of small volume, light weight and high power, the weight of the whole set of device is only 200 kilograms, the output power can reach 10000kVA, and the requirements of field tests are completely met.
(4) The technical scheme can simultaneously output positive sequence voltage, positive sequence current, negative sequence voltage and negative sequence current, can simultaneously output symmetrical three-phase voltage and current, can also simultaneously output asymmetrical three-phase voltage and current, can simultaneously output two-phase voltage and current and single-phase current and voltage, can freely adjust the phase between the current and the voltage, can simulate single-phase fault and phase-to-phase fault, and can also simulate internal fault and external fault. The safety of the primary and secondary fusion equipment is guaranteed, and the safe operation of the power distribution network is guaranteed.
(5) The technical scheme overcomes the defect that alternating current parameters such as three-phase current, three-phase voltage, electric energy and the like cannot be acquired before the equipment is put into operation, and provides guarantee for the operation safety of the primary and secondary fusion equipment of the power distribution network. The blank of the primary and secondary fusion equipment testing device in the field is filled.
Drawings
Fig. 1 is a circuit schematic of the present invention.
In the drawings: the output current range of the three-phase current source is 0-1000A, and the phase adjustment range is 0-360o(ii) a Three-phase voltage sourceThe output voltage range is 0-10 kV, and the phase adjustment range is 0-360 kVo；LBAAs a phase-A current transformer, LBBIs a B-phase current transformer, LBCA C-phase current transformer; DLA、DLB、DLCRespectively an A phase, a B phase and a C phase of the primary and secondary fusion switch (the primary and secondary fusion switch is a tested object, namely a tested object); YB (Yb)AIs a A-phase step-up transformer, YBBIs a B-phase step-up transformer, YBCIs a C-phase step-up transformer.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some embodiments of the utility model, not all embodiments. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and all of them should fall into the protection scope of the present invention.
Example 1:
a test device for primary and secondary fusion equipment of a power distribution network comprises a three-phase current source, a three-phase voltage source, a current transformer connected with the three-phase current source, and a step-up transformer connected with the three-phase voltage source; the current transformer is made of high-insulation materials, in the current transformer, the insulation level of the secondary side to the iron core is more than or equal to 10kV, and the insulation level of the secondary side to the primary side is more than or equal to 10 kV.
The current input end and the current output end of the secondary side of the current transformer are respectively connected with two ends of a tested object; the voltage output end of the secondary side of the boosting transformer is connected with the current input end of the secondary side of the current transformer, the voltage of the secondary side of the boosting transformer is input to the secondary side of the current transformer, the potential of the secondary side of the current transformer is raised, and normal sampling of a voltage transformer in a tested device is guaranteed.
The current transformer is provided with 3 current transformers which are respectively LBA、LBBAnd LBC(ii) a 3 current transformers LBA、LBBAnd LBCRespectively with the primary side of a three-phase current sourceOutput connection, 3 current transformers LBA、LBBAnd LBCAre respectively connected with a tested device DLA、DLBAnd DLC. The current output by the secondary side of the current transformer is 0-1000A, and the current of 0-1000A is connected to the device DL to be testedA、DLBAnd DLCPerforming the following steps; device under test DLA、DLBAnd DLCA two-shot fusion switch is used. In this embodiment, the current output by the secondary side of the current transformer is 1000A.
The step-up transformer is provided with 3 units which are YB respectivelyA、YBBAnd YBC(ii) a 3 step-up transformer YBA、YBBAnd YBCThe primary sides of the three-phase boosting transformers YB are respectively connected with the output ends of three-phase voltage sourcesA、YBBAnd YBCThe voltage output ends of the secondary sides are respectively connected with a current transformer LBA、LBBAnd LBCThe current input end of the secondary side is connected. The secondary side of the boosting transformer outputs 0-10 kV voltage to the secondary side of the current transformer, and the potential of the secondary side of the current transformer is raised so as to ensure normal sampling of a voltage transformer in the tested device.
In this embodiment, the secondary side of the step-up transformer outputs 10kV voltage to the secondary side of the current transformer, and the potential of the secondary side of the current transformer is raised to 10kV, so as to ensure normal sampling of the voltage transformer in the tested device.
The connection mode of the specific circuit of the primary and secondary fusion equipment test device is as follows:
the 1 turbulence and 2 ends of the three-phase current source are respectively connected with a current transformer LB A1 and 2 ends, LBAThe 3 terminal and the 4 terminal are respectively connected with a primary-secondary fusion switch DLAAnd terminals 1 and 2 (to explain that the primary and secondary fusion switches are the object to be tested, i.e., the sample).
The 3 turbulent ends and the 4 ends of the three-phase current source are respectively connected with a current transformer LB B1 and 2 ends, LBBThe 3 terminal and the 4 terminal are respectively connected with a primary-secondary fusion switch DLBEnd 1 and end 2.
The 5 turbulent and 6 ends of the three-phase current source are respectively connected with the current transformerPressure device LB C1 and 2 ends, LBCThe 3 terminal and the 4 terminal are respectively connected with a primary-secondary fusion switch DLCEnd 1 and end 2.
The 1 end and the 2 end of the three-phase voltage source are respectively connected with a step-up transformer YB A1 terminal and 2 terminal of the step-up transformer YBAEnd 3 of the transformer is connected with a current transformer LBAEnd 4 of YBAAnd the 4 terminal of the transformer is grounded.
The 3 end and the 4 end of the three-phase voltage source are respectively connected with a step-up transformer YB B1 terminal and 2 terminal of the step-up transformer YBBEnd 3 of the transformer is connected with a current transformer LBBEnd 4 of YBBAnd the 4 terminal of the transformer is grounded.
The 5 end and the 6 end of the three-phase voltage source are respectively connected with a step-up transformer YB C1 terminal and 2 terminal of the step-up transformer YBCEnd 3 of the transformer is connected with a current transformer LBCEnd 4 of YBCAnd the 4 terminal of the transformer is grounded.
The specific working principle of the circuit is as follows: the AC power supply of the three-phase current source is switched on, the three-phase current source is started, the boost knob of the three-phase current source is adjusted, the 144V three-phase voltage is output to the primary side of the current transformer, the secondary side of the current transformer outputs 6V voltage, and the output current is 1000A. The output current regulation range of the three-phase current source is as follows: 0-1000A, and the phase adjustment range is 0-360o。
Then the AC power supply of the three-phase voltage source is switched on, the boost knob of the three-phase voltage source is started, the three-phase voltage source outputs 144V to the primary side of the boost transformer, and the 144V is transmitted to the primary side of the boost transformer through the boost transformer YBA、YBB、YBCRespectively step up to 10kV, and the three-phase voltage is applied to an A-phase current transformer LBA Secondary side 4 terminal, B phase current transformer LBB Secondary side 4 terminal and C phase current transformer LB c 4 end of the secondary side. The output voltage regulating range of the three-phase voltage source is 0-10 kV, and the phase regulating range is 0-360 kVo。
With inductive load, adjusting the phase between voltage and current: make A phase voltage UAAdvancing phase A current IAIs 30 ofoPhase of voltage U of B phaseBAdvancing phase B current IBIs 30 ofoPhase U of C phase voltageCAdvancing the C-phase current ICIs 30 ofoAnd checking whether the AC sampling condition of the primary and secondary fusion switches is normal or not, and recording the numerical values of voltage, current, power and electric energy.
With resistive load, adjusting the phase between voltage and current: make A phase voltage UAAnd phase A current IAIn phase, phase angle 0o(ii) a Phase U of B voltageBAnd phase I of current BBIn phase and phase angle of-120o(ii) a C phase voltage UCAnd C phase current ICIn phase, phase angle of-240o(ii) a And checking whether the AC sampling condition of the primary and secondary fusion switches is normal or not, and recording the numerical values of voltage, current, power and electric energy.
Claims (7)
1. The utility model provides a distribution network one secondary fuses equipment test device which characterized in that: the three-phase current source and the three-phase voltage source are included, a current transformer connected with the three-phase current source and a boosting transformer connected with the three-phase voltage source are included; the current input end and the current output end of the secondary side of the current transformer are respectively connected with two ends of a tested object; the voltage output end of the secondary side of the boosting transformer is connected with the current input end of the secondary side of the current transformer, the voltage of the secondary side of the boosting transformer is input to the secondary side of the current transformer, the potential of the secondary side of the current transformer is raised, and normal sampling of a voltage transformer in a tested device is guaranteed.
2. The test device for the primary and secondary fusion equipment of the power distribution network according to claim 1, characterized in that: the current transformer is provided with 3 current transformers which are respectively LBA、LBBAnd LBC(ii) a 3 current transformers LBA、LBBAnd LBCThe primary sides of the three-phase current source are respectively connected with the output ends of three-phase current sources, and 3 current transformers LBA、LBBAnd LBCAre respectively connected with a tested device DLA、DLBAnd DLC。
3. The test device for the primary and secondary fusion equipment of the power distribution network according to claim 2, wherein the test device is characterized in thatIn the following steps: the current output by the secondary side of the current transformer is 0-1000A, and the current of 0-1000A is connected to the device DL to be testedA、DLBAnd DLCPerforming the following steps; device under test DLA、DLBAnd DLCA two-shot fusion switch is used.
4. The test device for the primary and secondary fusion equipment of the power distribution network according to claim 2, characterized in that: the step-up transformer is provided with 3 units which are YB respectivelyA、YBBAnd YBC(ii) a 3 step-up transformer YBA、YBBAnd YBCThe primary sides of the three-phase boosting transformers YB are respectively connected with the output ends of three-phase voltage sourcesA、YBBAnd YBCThe voltage output ends of the secondary sides are respectively connected with a current transformer LBA、LBBAnd LBCThe current input end of the secondary side is connected.
5. The test device for the primary and secondary fusion equipment of the power distribution network according to claim 1 or 4, characterized in that: the secondary side of the boosting transformer outputs 0-10 kV voltage to the secondary side of the current transformer, and the potential of the secondary side of the current transformer is raised so as to ensure normal sampling of a voltage transformer in the tested device.
6. The test device for the primary and secondary fusion equipment of the power distribution network according to claim 1 or 4, characterized in that: the secondary side of the boosting transformer outputs 10kV voltage to the secondary side of the current transformer, and the potential of the secondary side of the current transformer is raised to 10kV, so that normal sampling of a voltage transformer in a tested device is guaranteed.
7. The test device for the primary and secondary fusion equipment of the power distribution network according to any one of claims 1 to 4, wherein: the current transformer is made of high-insulation materials, in the current transformer, the insulation level of the secondary side to the iron core is more than or equal to 10kV, and the insulation level of the secondary side to the primary side is more than or equal to 10 kV.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122330715.1U CN215932045U (en) | 2021-09-26 | 2021-09-26 | Test device for primary and secondary fusion equipment of power distribution network |
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| CN202122330715.1U CN215932045U (en) | 2021-09-26 | 2021-09-26 | Test device for primary and secondary fusion equipment of power distribution network |
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