CN204832484U - Intelligent substation compensation formula rises and flows device - Google Patents
Intelligent substation compensation formula rises and flows device Download PDFInfo
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- CN204832484U CN204832484U CN201520526546.0U CN201520526546U CN204832484U CN 204832484 U CN204832484 U CN 204832484U CN 201520526546 U CN201520526546 U CN 201520526546U CN 204832484 U CN204832484 U CN 204832484U
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Abstract
The utility model relates to an intelligent substation compensation formula rises and flows device, including voltage control system, capacitance compensation system and the electric current emergence system that the order is connected, the voltage control system is used for connecting external power source, electric current emergence system is used for connecting equipment under test. The utility model discloses can select to rise the series -parallel connection mode that flows ware heavy current winding according to actual test circuit's the condition, it is practical nimble. Having overcome each and having risen and have the individual difference between the stream ware, every rises input winding and output winding of flowing the ware and has unbalanced phenomenon.
Description
Technical field
The utility model relates to a kind of tester, is a kind of intelligent substation on-the-spot electronic current mutual inductor big current rising test device specifically.
Background technology
The ubiquitous problem of current intelligent substation electronic current mutual inductor a flow-through test is that a up-flow electric current does not reach ratings, cannot meet the requirement of commissioning test code.Intelligent substation electronic current mutual inductor 100% rated point electric current will reach 2000A, and 500kV transformer station is taller reaches 2500A to 3000A.Existing equipment only can be raised to a rated current when delivery test, site test limits by condition, does not substantially reach.After installing according to field investigation HGIS, loop reactive loss increases, even if adopt the enough large up-flow equipment of power to be difficult to rise to a rated current, the technical parameter of domestic existing up-flow device does not reach regulatory requirements substantially yet.About the primary current of current intelligent substation electronic current mutual inductor can only be added to 60% ratings, do not reach the requirement of commissioning test code.Time and the manpower of at substantial are also wanted in test, cause experiment work efficiency very low.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of intelligent substation on-the-spot electronic current mutual inductor big current up-flow tester, can solve the problem that the on-the-spot rising test of electronic current mutual inductance does not reach a ratings.
The technical scheme that the utility model is adopted for achieving the above object is: the compensation up-flow device of intelligent substation, comprises the voltage-regulating system, capacitance compensation system and the electrical current generation system that are linked in sequence; Described voltage-regulating system is for connecting external power source; Described electrical current generation system is for connecting equipment under test.
Described voltage-regulating system comprises main voltage regulator, fine setting pressure regulator and isolating transformer; The input end of described main voltage regulator, fine setting pressure regulator is all connected with external power source, and an output terminal of main voltage regulator is connected with an output terminal of isolating transformer; Fine setting output voltage regulator is connected with the input end of isolating transformer; Another output terminal of isolating transformer and another output terminal of main voltage regulator, as the output terminal of voltage-regulating system, are connected with capacitance compensation system.
Described main voltage regulator is autocoupling type pole structure pressure regulator.
Described fine setting pressure regulator is autocoupling type annular pressure regulator.
Described capacitance compensation system is the parallel circuit that multiple electric capacity is formed after tandem tap respectively; The two ends of parallel circuit are input end and the output terminal of capacitance compensation system.
Described electrical current generation system adopt current lifting device input winding, three independently export winding transformer, the primary coil two ends of transformer are connected with the output terminal of capacitance compensation system, the output terminal of the first secondary coil, the output terminal of second subprime coil with third time level coil output terminal for being connected equipment under test.
The positive output end of described first secondary coil is connected the positive output end as electrical current generation system with the positive output end of second subprime coil, the negative output terminal of the first secondary coil is connected the negative output terminal as electrical current generation system with the negative output terminal of second subprime coil, be connected with equipment under test.
The negative output terminal of described first secondary coil is connected with the positive output end of second subprime coil, the positive output end of the first secondary coil is as the positive output end of electrical current generation system, the negative output terminal of second subprime coil connects the negative output terminal as electrical current generation system, is connected with equipment under test.
Described third time, the output terminal of level coil was connected with equipment under test.
The utility model has following beneficial effect and advantage:
1. the utility model can select the connection in series-parallel connected mode of current lifting device big current winding according to the situation in actual tests loop, flexibly practical.Overcoming between each current lifting device and there is individual difference, there is unbalanced phenomenon in input winding and the output winding of each current lifting device.
2. adopt shunt capacitance to carry out reactive-load compensation, when the size adjustment of electric capacity reaches resonance, idle and the capacitive reactive power of perception can be made mutually to balance, thus the capacity requirement greatly reduced power supply, pressure regulator and current lifting device, be applicable to the on-the-spot rising test of intelligent substation electronic current mutual inductor.
3. solve electronic mutual inductor and rear primary circuit long (70 meters) is installed, the idle excessive problem of perception.
4. be some special test environment of reply, current lifting device additionally provides the mode that primary current punching exports, and in order to avoid the phenomenon that iron core local is saturated, adopts wiring to install fixed form additional, the wire in big current loop is guaranteed the center at center hole.
Accompanying drawing explanation
Accompanying drawing 1 is the structured flowchart of compensation up-flow device;
Accompanying drawing 2 is voltage-regulating system circuit theory diagrams;
Accompanying drawing 3 is capacitance compensation system circuit theory diagrams;
Accompanying drawing 4 is electrical current generation system circuit theory diagrams; .
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The compensation up-flow device of intelligent substation forms primarily of by three parts, is voltage-regulating system, capacitance compensation system and electrical current generation system (see Fig. 1) respectively.In process of the test, by adjusting the capacitance of capacitance compensation system, capacitive reactive power component has been made to be greater than the perceptual idle component (capacity current of compensation is greater than inductance current) of a big current loop generation, reach under-compensation, and close to tuning-points, thus overcome the up-flow difficulty that perceptual reactive loss brings, primary current is raised and reaches ratings, reach the object of substation field big current up-flow, and the intelligent substation being applicable to various electric pressure is on-the-spot.Equipment under test is generally electronic type or electromagnetic current transducer.
Electrical current generation system of the present utility model adopts the design of integration, provide several High-current output winding, and the connection in series-parallel connected mode of current lifting device big current winding is selected according to the situation in actual tests loop, winding all have employed the winding method of homogenous segmentations when producing, can avoid iron core local saturated phenomenon during High-current output.
As voltage-regulating system is accessed 380V power supply by Fig. 2, carry out initial adjustment by main voltage regulator and voltage is raised, then finely tuned by fine setting pressure regulator, through isolating transformer, the current value of voltage-regulation to required measurement is carried out to loop.When actual pressure regulation, corresponding pilot lamp will luminous indicate.
Main voltage regulator (coarse adjustment pressure regulator) for rated capacity be the autocoupling type pole structure pressure regulator of 100KVA, fine setting pressure regulator be autocoupling type annular pressure regulator.
The input voltage of isolating transformer is AC0-400V, output voltage is AC0-8V, when finely tuning pressure regulator input AC380V, the output voltage of fine setting pressure regulator is AC0-400V, after this output voltage inputs to the input end of isolating transformer, the output voltage range of isolating transformer is 0-8V, because the output windings in series of isolating transformer is at the output terminal of main voltage regulator, so when finely tuning pressure regulator and matching with isolating transformer, test macro voltage adjustment section serves the effect of fine setting.
As this capacitance compensation system of Fig. 3 provides 8 groups of independently electric capacity output input and cut-off loops altogether, actual when putting from left to right its capacitor switching amount playing that 1-4 group often organizes be 10kvar, the capacitor switching amount that 5-8 group is often organized is 20kvar, and the capacitor switching amount that 9-10 group is often organized is 20kvar.System operationally, can superpose arbitrarily required electric capacity according to actual test loop.Capacitance compensation system, with control panel, all has " input " and " cut-out " two switches, " input " in expression Fig. 3, the switch of corresponding group closes, " cut-out " expression switch disconnection to the control mode often organizing independent capacitance amount.Each electric capacity " input " switch all there is the mark of electric capacity.
The object of capacitance compensation system uses in order to the power factor improving test macro, can select the input electric capacity of capacitor compensation cabinet, thus improve the power factor of test macro according to the size of an on-the-spot test loop power factor.
In use, capacitance compensation system is connected in parallel between voltage-regulating system and electrical current generation system test macro.The input voltage of capacitance compensation system is AC0-400V, and output voltage is AC0-400V.The total compensation capacitance amount of capacitance compensation system is 180kVar, point 4 groups of 10kvar, 4 groups of 20kvar, 2 groups of 30kvar, and the electric capacity often organized can independently control to select to drop into or cut off.
As shown in Figure 4, electrical current generation system adopts electrical current generation system to adopt current lifting device input winding, three independently High-current output winding transformers; Annular core as permeability magnetic material, the even coiling of each big current winding wire bag.Give the way of output of current feedback circuit in figure, the High-current output winding of this current feedback circuit is made up of three windings altogether, is respectively C1-C2, P1-P2, punching winding.The way of output of winding can be selected according to the actual service condition in scene.Wherein punching winding also can according to test needs, and its punching number of turn can be a circle, two circles or more.In addition, C1-C2, P1-P2 are two independent High-current output windings exported, and in order to the output current of these big current windings of energy Measurement accuracy, these two windings are also respectively equipped with sampling Current Transformer, and output terminal is respectively 1S1,1S2 and 2S1,2S2.
Wherein the mode of connection of P1, P2 and C1, C2 is in table one: P1, P2 and C1, C2 mode of connection table.Provide two kinds of modes of connection, corresponding selection can be done according to actual service condition.
Table one
When test occasion belong to large, the required loop voltage of output current value do not need too high when, " P1 and C1 parallel connection; P2 and C2 parallel connection " connected mode can be selected, now the electric current of current feedback circuit internal current mutual inductor is than being 2000A/5A, inner sampling Current Transformer secondary output terminal is 2S1,2S2, and equipment in use, by 1S1,1S2 short circuit; When test occasion belong to less, the required loop voltage of output current higher when, can select that " P2 and C1 connects " connected mode, time current lifting device internal current mutual inductor electric current than being 2000A/5A, Current Transformer Secondary output terminal is 1S1,1S2, equipment in use, by 2S1,2S2 short circuit.
In order to make the use of this current feedback circuit, there is better dirigibility, the High-current output mode of this product also provides mode of connection and the output of punching circle of punching simultaneously, now needs in the big current loop of punching, connect corresponding current transformer and be connected to corresponding reometer.
Claims (9)
1. the compensation up-flow device of intelligent substation, is characterized in that: comprise the voltage-regulating system, capacitance compensation system and the electrical current generation system that are linked in sequence; Described voltage-regulating system is for connecting external power source; Described electrical current generation system is for connecting equipment under test.
2. the compensation up-flow device of intelligent substation according to claim 1, is characterized in that described voltage-regulating system comprises main voltage regulator, fine setting pressure regulator and isolating transformer; The input end of described main voltage regulator, fine setting pressure regulator is all connected with external power source, and an output terminal of main voltage regulator is connected with an output terminal of isolating transformer; Fine setting output voltage regulator is connected with the input end of isolating transformer; Another output terminal of isolating transformer and another output terminal of main voltage regulator, as the output terminal of voltage-regulating system, are connected with capacitance compensation system.
3. the compensation up-flow device of intelligent substation according to claim 2, is characterized in that described main voltage regulator is autocoupling type pole structure pressure regulator.
4. the compensation up-flow device of intelligent substation according to claim 2, is characterized in that described fine setting pressure regulator is autocoupling type annular pressure regulator.
5. the compensation up-flow device of intelligent substation according to claim 1, is characterized in that described capacitance compensation system is the parallel circuit that multiple electric capacity is formed after tandem tap respectively; The two ends of parallel circuit are input end and the output terminal of capacitance compensation system.
6. the compensation up-flow device of intelligent substation according to claim 1, it is characterized in that described electrical current generation system adopt current lifting device input winding, three independently export winding transformer, the primary coil two ends of transformer are connected with the output terminal of capacitance compensation system, the output terminal of the first secondary coil, the output terminal of second subprime coil with third time level coil output terminal for being connected equipment under test.
7. the compensation up-flow device of intelligent substation according to claim 6, it is characterized in that the positive output end of described first secondary coil is connected the positive output end as electrical current generation system with the positive output end of second subprime coil, the negative output terminal of the first secondary coil is connected the negative output terminal as electrical current generation system with the negative output terminal of second subprime coil, be connected with equipment under test.
8. the compensation up-flow device of intelligent substation according to claim 6, it is characterized in that the negative output terminal of described first secondary coil is connected with the positive output end of second subprime coil, the positive output end of the first secondary coil is as the positive output end of electrical current generation system, the negative output terminal of second subprime coil connects the negative output terminal as electrical current generation system, is connected with equipment under test.
9. the compensation up-flow device of intelligent substation according to claim 6, is characterized in that the output terminal of described third time level coil is connected with equipment under test.
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| CN201520526546.0U CN204832484U (en) | 2015-07-20 | 2015-07-20 | Intelligent substation compensation formula rises and flows device |
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| CN201520526546.0U CN204832484U (en) | 2015-07-20 | 2015-07-20 | Intelligent substation compensation formula rises and flows device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884570A (en) * | 2017-12-07 | 2019-06-14 | 广东电网有限责任公司东莞供电局 | A kind of electronic current lift |
| CN111289938A (en) * | 2020-03-12 | 2020-06-16 | 国网山东省电力公司电力科学研究院 | Current transformer error calibration equipment |
| CN111443323A (en) * | 2020-04-26 | 2020-07-24 | 国网福建省电力有限公司 | 30000A current transformer field mobile calibration system |
| CN112305361A (en) * | 2020-11-06 | 2021-02-02 | 江苏省电力试验研究院有限公司 | Temperature rise test three-phase unbalanced current compensation system and control method |
| CN113691191A (en) * | 2021-08-26 | 2021-11-23 | 中铁第四勘察设计院集团有限公司 | Device and method for reducing power supply voltage of stator of long-stator synchronous linear motor |
-
2015
- 2015-07-20 CN CN201520526546.0U patent/CN204832484U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884570A (en) * | 2017-12-07 | 2019-06-14 | 广东电网有限责任公司东莞供电局 | A kind of electronic current lift |
| CN111289938A (en) * | 2020-03-12 | 2020-06-16 | 国网山东省电力公司电力科学研究院 | Current transformer error calibration equipment |
| CN111289938B (en) * | 2020-03-12 | 2022-02-08 | 国网山东省电力公司营销服务中心(计量中心) | Current transformer error calibration equipment |
| CN111443323A (en) * | 2020-04-26 | 2020-07-24 | 国网福建省电力有限公司 | 30000A current transformer field mobile calibration system |
| CN112305361A (en) * | 2020-11-06 | 2021-02-02 | 江苏省电力试验研究院有限公司 | Temperature rise test three-phase unbalanced current compensation system and control method |
| CN113691191A (en) * | 2021-08-26 | 2021-11-23 | 中铁第四勘察设计院集团有限公司 | Device and method for reducing power supply voltage of stator of long-stator synchronous linear motor |
| CN113691191B (en) * | 2021-08-26 | 2023-05-30 | 中铁第四勘察设计院集团有限公司 | Device and method for reducing power supply voltage of long-stator synchronous linear motor stator |
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Address after: 110021 No. 69 Tengfei street, Tiexi District, Liaoning, Shenyang Patentee after: LIAONING POWER TRANSMISSION AND DISTRIBUTION ENGINEERING Co.,Ltd. Address before: 110021 No. 69 Tengfei street, Tiexi District, Liaoning, Shenyang Patentee before: LIAONING POWER TRANSMISSION AND TRANSFORMATION PROJECT Co.,Ltd. |