CN204515113U - Stand with the pick-up unit of DC power system insulation monitoring and warning device - Google Patents
Stand with the pick-up unit of DC power system insulation monitoring and warning device Download PDFInfo
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Abstract
A kind of station uses the pick-up unit of DC power system insulation monitoring and warning device, comprise DC power source unit, auxiliary direct current source unit, AC power unit: DC power source unit comprises the first rectifying and pressure-regulating module SDC1 and DC bus KM1, auxiliary direct current source unit comprises the second rectifying and pressure-regulating module SDC2 and auxiliary DC bus KM2, and AC power unit comprises AC voltage regulator T1 and switch S2; Also comprise insulation against ground test cell, waveform surveys note, interchange seals in and control protection electric circuit.The beneficial effects of the utility model are: achieve and alarm test, looped network alarm test altered mutually to station DC power system insulation monitoring and warning device, exchange seal in alarm test, detection that balance bridge exchanges the test of superposition tolerance and insulation resistance monitoring and the functional performance such as earthing wire-selecting correctness test or examination checking, affect the safety in production of electric system to avoid direct supply insulation monitoring and warning device improperly.
Description
Technical field
The utility model relates to the station DC power system such as power plant high voltage station, transformer station, current conversion station of electric system, especially for the evaluation station parameter of DC power system insulation monitoring and warning device, the pick-up unit of functional performance and detection method.
Background technology
Along with society, economic development, power load is growing, and electric system scale constantly expands, and increasing booster stations, transformer station, current conversion station etc. build up and put into operation.Due to electrical production be send out, defeated, join and once complete, the safety in operation of booster stations, transformer station etc. and reliability directly related with confession electricity consumption, the economic loss that booster stations, transformer station etc. cause power outage to bring because of self reason and social loss very huge.Stand with DC power system be for the loads such as control, protection, communication normal operation power supply and electric network fault are provided after the accident power supply that resumes operation fast; it is the key equipment ensureing the safe operations such as power plant high voltage station, transformer station, current conversion station; therefore; improving station DC power system safety operation level, is the importance ensureing power grid security.Due to China's power plant high voltage station, transformer station, current conversion station etc., with (be called for short station with), DC power system adopts isolated neutral system substantially, therefore its positive and negative electrode is in state of insulation over the ground.After system insulation against ground drops to certain value (as 220V straight-flow system is generally 25k Ω), we are referred to as DC earthing.When there are one or more ground connection in DC power system; very easily cause and use the protective relaying device of station DC power supply and the malfunction of control device or tripping, need the insulation status of DC power system insulation monitoring and warning device to station DC power system to monitor for this reason.
Direct supply insulation monitoring and warning device is typically employed in line detection system DC bus and occurs with or without earth fault, after bus detects that DC ground fault occurs, then start " the route selection function " of Branch-circuit check and then determine fault branch, sending alarm signal with timer.If but insulation monitoring and warning device detection mode, detection resistance selection are improper, can cause skew and the fluctuation of DC power system busbar voltage, also can have influence on the station power use system even security of operation of electrical network time serious.Produce in order to avoid direct supply insulation monitoring and warning device improperly affects electric system, relevant detection or examination checking must be carried out, so need a kind of method of detecting its parameter, functional performance and related device.
Utility model content
The purpose of this utility model is to provide a kind ofly stands by the pick-up unit of DC power system insulation monitoring and warning device and detection method, detects the parameter of electric system station direct supply insulation monitoring and warning device, functional performance or examines checking.
The technical scheme realizing the utility model object is as follows:
Stand with a pick-up unit for DC power system insulation monitoring and warning device, comprise DC power source unit, auxiliary direct current source unit, adjustment unit and switch S1; DC power source unit: comprise the first rectifying and pressure-regulating module SDC1 and DC bus KM1, the output positive and negative charge of the first rectifying and pressure-regulating module SDC1 is connected respectively to positive pole KM1+ and the negative pole KM1-of DC bus KM1; Auxiliary direct current source unit: comprise the second rectifying and pressure-regulating module SDC2 and auxiliary DC bus KM2, the output positive and negative charge of the second rectifying and pressure-regulating module SDC2 is connected respectively to positive pole KM2+ and the negative pole KM2-of auxiliary DC bus KM2; Adjustment unit: comprise adjustable resistor R01 and adjustable resistor R02; The positive pole KM2+ of described auxiliary DC bus KM2 is connected to the input end of adjustable resistor R01, and the output terminal of adjustable resistor R01 is connected to the first input end of switch S1; The negative pole KM2-of auxiliary DC bus KM2 is connected to the input end of adjustable resistor R02, and the output terminal of adjustable resistor R02 is connected to second input end of switch S1; The output terminal of described switch S1 is connected to the negative pole KM1-of DC bus KM1.This programme is used for altering alarm test mutually.
Further technical scheme: described switch S1 is replaced with double-pole switch K5; The output terminal of adjustable resistor R01 and adjustable resistor R02 is connected to positive pole KM1+ and the negative pole KM1-of DC bus KM1 respectively by double-pole switch K5.This programme is used for looped network alarm test.
Further technical scheme: described auxiliary direct current source unit, adjustment unit and switch S1 are replaced with signal generator; Signal generator is connected to DC bus KM1.This programme is used for interchange and seals in alarm test.
Further technical scheme: described auxiliary direct current source unit, adjustment unit and switch S1 are replaced with AC power unit; Described AC power unit comprises AC voltage regulator T1 and switch S2, the input end of AC voltage regulator T1 is connected to isolating transformer, the ac output end of AC voltage regulator T1 is connected to the input end of switch S2, and first output terminal of switch S2 and the second output terminal are connected respectively to positive pole KM1+ and the negative pole KM1-of DC bus KM1.This programme is used for balance bridge and exchanges the test of superposition tolerance.
Further technical scheme: described auxiliary direct current source unit, adjustment unit and switch S1 replace with insulation against ground test cell; Described insulation against ground test cell comprises system capacitance test circuit XT, two or more direct current branch earth resistance circuit ZLi and oscillograph; Described system capacitance test circuit XT comprises the first tunable capacitor branch road and the second tunable capacitor branch road; First tunable capacitor props up route K switch 01 and adjustable condenser C01 is in series, and one end is connected to the positive pole KM1+ of DC bus KM1, other end ground connection; Second tunable capacitor props up route K switch 02 and adjustable condenser C02 is in series, and one end is connected to the negative pole KM1-of DC bus KM1, other end ground connection; Described direct current branch earth resistance circuit ZLi comprises the first adjustable resistance branch road and the second adjustable resistance branch road; First adjustable resistance branch road comprises the two ends being parallel to adjustable resistor Ri1 after the K switch i1 of series connection and adjustable resistor Ri1, K switch i3 and adjustable condenser Ci1 connect again; First adjustable resistance branch road one end is connected to the positive pole KM1+ of DC bus KM1, other end ground connection; Second adjustable resistance branch road comprises the two ends being parallel to adjustable resistor Ri2 after the K switch i2 of series connection and adjustable resistor Ri2, K switch i4 and adjustable condenser Ci2 connect again; Second adjustable resistance branch road one end is connected to the negative pole KM1-of DC bus KM1, other end ground connection; Described oscillograph is connected to DC bus KM1.This programme is used for insulation resistance monitor and feedback and calculates and earthing wire-selecting correction judgement.
The beneficial effects of the utility model are: achieve and alarm test, looped network alarm test altered mutually to station DC power system insulation monitoring and warning device, exchange seal in alarm test, detection that balance bridge exchanges the test of superposition tolerance and insulation resistance monitoring and the functional performance such as earthing wire-selecting correctness test or examination checking, affect the safety in production of electric system to avoid direct supply insulation monitoring and warning device improperly.
Accompanying drawing explanation
Fig. 1 is structure of the present utility model and circuit theory diagrams.
Embodiment
Designing points of the present utility model is as follows:
1) the adjustable flow module being connected to AC power opens by minisize dc sky the output realizing direct supply, to replace the positive and negative electrode bus of station DC power system and corresponding DC voltage, and connects several direct currents output branch road.Every bar direct current exports branch road and be connected to adjustable resistor and capacitor over the ground respectively on the empty positive and negative electrode opened of minisize dc, for arranging different DC earthing situations, and the operating condition of imitating substation station DC power system.
2) pressure regulator being connected to AC power realizes alternating voltage by switch and is superimposed upon on balance bridge detection resistance, the ability of 250V power frequency ac voltage and system nominal DC voltage is tolerated and cite sb. for meritorious service to the survey that of ac is scurried in outside can because direct supply insulation monitoring and warning device must possess balance bridge resistance long-term (>=8h), regulate different ac voltage by pressure regulator, imitate scurrying into and the tolerance of detecting bridge alternating voltage being tested of outside power-frequency alternating-current amperage.
3) the positive and negative electrode bus access signal generator of station DC power system is being replaced, adjustment exports the voltage wave of different frequency and amplitude, and emphasis scurries into the measurement of of ac, record and analysis ability for scurrying into the detection of different frequency of ac or the tested direct supply insulation monitoring and warning device of examination checking to outside.
4) another is connected to the adjustable flow module of AC power, the positive and negative electrode bus that can access respectively and replace station DC power system is opened by switch or minisize dc sky, test two sections of DC bus generation homopolarities or heteropole alter mutually with looped network time (two sections independently DC bus only the improper connection that occurs of a pole for alter mutually, the connection that the two poles of the earth occur is looped network), the breakdown judge ability of direct supply insulation monitoring and warning device.
5) replacing the positive and negative electrode bus access oscillograph of station DC power system, for measuring, recording and analyze the waveform of DC bus-bar voltage displacement and fluctuation.
Stand with the structure of the pick-up unit of DC power system insulation monitoring and warning device and annexation as shown in Figure 1:
A) 250V alternating voltage is input to rectifying and pressure-regulating module (SDC1) by power switch K1 by DC power source unit, and its DC voltage exported is applied on positive and negative DC bus (KM1+, KM1-) respectively by K switch 2.Be connected in parallel on the AC power before and after rectifying and pressure-regulating module (SDC1) and direct supply simultaneously, connected working power and the monitoring sampling terminal of tested insulation monitoring and warning device by leading-out terminal respectively.By the positive and negative direct current lead exporting branch road (as branch road 1) through DC circuit breaker (as positive pole K11, negative pole K12) simultaneously through tested insulation monitoring and warning device the route selection sensor (CT) of being joined, be connected to adjustable resistor (as R11, R12) and capacitor (as C11, C12), the DC circuit breaker (as positive pole K13, negative pole K14) of capacitor series according to detection need to carry out capacitor (C11, C12) throwing, cut.
B) 250V AC power is input to auxiliary rectifier voltage regulating module (SDC2) by power switch K3 by auxiliary direct current source unit, its negative or positive electrode exported assists DC bus (KM2+ or KM2-) DC voltage after adjustable resistor (R01, R02), is applied on negative DC bus (KM1-) respectively by S1 switch.Be connected in parallel on the AC power before and after auxiliary rectifier voltage regulating module (SDC2) and direct supply simultaneously, connected working power and the monitoring sampling terminal of supplementary insulation monitoring device by leading-out terminal respectively.
C) the 250V AC power exported through isolating transformer is input to ac voltage regulator T1 by power switch K4 by AC power unit, and its alternating voltage V3 exported is applied on negative or positive electrode DC bus (KM1+ or KM1-) respectively by S2 switch.
D) insulation against ground test cell comprises direct current branch earth resistance circuit and system capacitance test circuit.Wherein, direct current branch earth resistance circuit is made up of adjustable resistor (as R11, R12 etc.), adjustable condenser (as C11, C12 etc.) and switch (as K011, K12), and system capacitance test circuit is made up of adjustable condenser C01 and C02 and K switch 01, K02.
E) waveform survey note, exchange seal in and Control protection by corresponding acquisition and recording device (as oscillograph or waveform analyzer), signal generation apparatus (signal generator), exchange or DC circuit breaker and Monitoring and Controlling (electric current, voltage, temperature) System's composition.
Device of the present utility model, can also according to altering alarm test, looped network alarm test mutually, exchange seal in alarm test, balance bridge exchanges the test of superposition tolerance and the detection of the functional performance such as insulation resistance monitoring and the test of earthing wire-selecting correctness or examination checking needs, builds corresponding test circuit.
To the detection of direct supply insulation monitoring and warning device and the method for checking as follows:
A) all isolating switchs (switch) are first disconnected, switch puts centre position, the power lead of tested insulation monitoring and warning device and supplementary insulation pick-up unit, monitoring sample line, route selection sensor (CT) and communicate (communication ends of tested insulation monitoring and warning device and supplementary insulation pick-up unit) are connected to corresponding terminal, and acquisition and recording device (as oscillograph), signal generation apparatus (signal generator), monitor control system etc. are in normal operating conditions.
B) power turn-on K switch 1 makes rectifying and pressure-regulating module (SDC1) reach duty, regulate the VD minimum monitoring voltage value that extremely tested insulation monitoring and warning device is corresponding, read voltage table V1 and tested insulation monitoring and warning device displayed value, carry out voltage monitoring error calculation.Then to the multiple test value of choose reasonable (containing the highest monitoring voltage value) in the scope of the highest monitoring voltage value, repeat to read voltage table V1 and tested insulation monitoring and warning device displayed value, carry out voltage monitoring error calculation, get maximum error value and count tested insulation monitoring and warning device voltage monitoring error.
C) the VD V1 monitoring system nominal voltage that extremely tested insulation monitoring and warning device is corresponding is regulated, the K2 that closes makes positive and negative DC bus (KM1+, KM1-) power on, complete the monitoring of tested insulation monitoring and warning device to arrange, make tested insulation monitoring and warning device enter normal monitoring state.Adjustable resistor (as R11, R12 etc.) is put maximal value (as 1M Ω), to close successively adjustable resistor (as R11, R12 etc.) isolating switch (as K11, K12 etc.) of each branch road, capacitor (as C11, C12) isolating switch (as K13, K14 etc.) and bus capacitor (as C01, C02) isolating switch (as K01, K02 etc.) according to trace routine.
When d) carrying out insulation resistance monitoring and the test of earthing wire-selecting correctness,
I) pole (negative or positive electrode) of a branch road is first selected to detect:
The K01 that closes regulates C01 capacitance, the multiple test value of choose reasonable (as 0,10 μ F, 30 μ F, 50 μ F, 80 μ F, 100 μ F) in 0 ~ 100 μ F scope, close K11 under each C01 capacitance again, R11 resistance value to tested insulation monitoring and warning device is regulated to send alarm, the positive and negative electrode voltage-to-ground value (DC voltage offset) of each test point of oscilloscope measurement record.Alarm generally divides insulation early warning and grounding alarm, after tested insulation monitoring and warning device completes earthing wire-selecting, record alarm displaying contents respectively, read R11 resistance value when insulating early warning and grounding alarm and tested insulation monitoring and warning device displayed value, carry out insulation resistance (grounding resistance) monitor and feedback to calculate and earthing wire-selecting correction judgement, disconnect K01 and K11 after completing, and regulate R11 resistance value to maximal value.
Close K11 and K13, the multiple test value of choose reasonable (as 0,1 μ F, 3 μ F, 5 μ F) in 0 ~ 5 μ F scope, and R11 resistance value is regulated under each C11 capacitance, alarm is sent, the positive and negative electrode voltage-to-ground value (DC voltage offset) of each test point of oscilloscope measurement record to tested insulation monitoring and warning device.After tested insulation monitoring and warning device completes earthing wire-selecting, record alarm displaying contents respectively, read R11 resistance value when insulating early warning and grounding alarm and tested insulation monitoring and warning device displayed value, carry out branch insulation resistance (grounding resistance) monitor and feedback to calculate and earthing wire-selecting correction judgement, disconnect K13 and K11 after completing, and regulate R11 resistance value to maximal value.
Ii) a pole (negative or positive electrode) of wantonly two branch roads is selected to detect:
The detection method of each pole and step are with reference to i) carrying out, alarm displaying contents and positive and negative electrode voltage-to-ground maximal value (DC voltage offset) is clearly recorded under often kind of array mode, read the resistance value and tested insulation monitoring and warning device displayed value that regulate, insulation resistance (grounding resistance) monitor and feedback carrying out each pole calculates and earthing wire-selecting correction judgement, the corresponding branch breaker of disconnection after completing, and adjusting resistance value is to maximal value.
Iii) the detection of a branch road positive pole and another branch road negative pole is first selected:
The detection method of each pole and step are with reference to i) carrying out, but the resistor at the two poles of the earth and capacitor regulate by equivalent, alarm displaying contents and positive and negative electrode voltage-to-ground maximum amplitude (DC voltage fluctuation) is clearly recorded under often kind of array mode, read the resistance value and tested insulation monitoring and warning device displayed value that regulate, insulation resistance (grounding resistance) monitor and feedback carrying out each pole calculates and earthing wire-selecting correction judgement, the corresponding branch breaker of disconnection after completing, and adjusting resistance value is to maximal value.
Iiii) testing result is passed judgment on:
After completing the detection of whole array mode, selecting maximum error value by polarity (negative or positive electrode), is namely the error of tested insulation monitoring and warning device, according to earthing wire-selecting falsely drop and leakage select number of times give accuracy judge.The judgement whether maximal value giving obtaining DC voltage offset and DC voltage fluctuation according to oscillograph recording again overflows.
E) interchange is carried out when sealing in alarm test, at start signal generator, select the sine wave of different frequency and the sinusoidal magnitude of ascending regulation output, send interchange to tested insulation monitoring and warning device and seal in alarm, record tested insulation monitoring and warning device alarm displaying contents, read interchange seal in display amplitude and carry out error calculation with signal generator output amplitude, check with or without waveform recording and route selection correction judgement.Complete the rear cut-off signal generator of test.
When f) altering test mutually, first confirm that K5 is in off-state, power turn-on K switch 3 makes rectifying and pressure-regulating module (SDC2) reach duty, regulate VD V2 to monitoring system nominal voltage corresponding to supplementary insulation monitoring device, positive and negative auxiliary DC bus (KM2+ or KM2-) powers on, complete supplementary insulation monitoring device to arrange, make it enter normal monitoring state.Maximal value (as 1M Ω) put by adjustable resistor (R01 and R02).Switch S1 is placed in respectively a pole (negative or positive electrode), regulates this pole adjustable resistor resistance value (as positive pole adjusts R01, negative pole to adjust R02), send to tested insulation detection device and alter alarm mutually, record alarm displaying contents.During looped network test, by adjustable resistor (R01 or R02) resistance value adjusting to maximal value, switch S1 puts centre position.Close K4 switch, regulates adjustable resistor resistance value (as R01, R02), sends looped network alarm to tested insulation monitoring and warning device, adjustable resistor (R01 or R02) resistance value and tested insulation monitoring and warning device displayed value during the reading alarm of record alarm displaying contents.Carry out looped network electrical resistance monitoring error calculation and alter alarm accuracy mutually judging, disconnect K5, K3 after completing and switch S1 is put centre position, and regulating adjustable resistor (R01 or R02) resistance value to maximal value.
G) under the normal wiring state of tested insulation monitoring and warning device, the uneven bridge of locking drops into.Switch S2 is placed in respectively a pole (negative or positive electrode); close K4; progressively regulate the alternating voltage V3 to 250V of ac voltage regulator T1; stop to the time that technical manual (Q/GDW1969-2013 transformer station direct current system insulation monitoring and warning device technical manual) requires; there is (comprising this demo plant without any protection act) in tested insulation monitoring and warning device situation without exception (as puncture, protection act and peculiar smell, the abnormal sound such as flashover overcurrent); after regulating alternating voltage V3 to 0V, disconnect K4 and switch S2 is put centre position.According to tested insulation monitoring and warning device exchange seal in survey cite sb. for meritorious service can, its monitoring capability to the power frequency amount of sealing in can be detected in this test process.
The major function of this device and technical indicator:
Major function: a kind of method and apparatus to the station direct supply insulation monitoring and warning device parameter detecting such as power plant high voltage station, transformer station, current conversion station, functional verification is provided, the performance index of the aspects such as its safety in operation, malfunction monitoring reliability are evaluated, causes to avoid the product of inferior quality or expand power grid accident.
Stand by the technical indicator of the pick-up unit of direct supply insulation monitoring and warning device:
AC supply voltage: 0 ~ 250V;
Direct current power source voltage: 0 ~ 300V;
Adjustable condenser: 0 ~ 100 μ F;
Adjustable resistor: 0 ~ 1000k Ω;
Rectification module: 0 ~ 300V, 50A;
Device short-time withstand voltage: 3 kV.
Claims (5)
1. stand with a pick-up unit for DC power system insulation monitoring and warning device, it is characterized in that, comprise DC power source unit, auxiliary direct current source unit, adjustment unit and switch S1;
DC power source unit: comprise the first rectifying and pressure-regulating module SDC1 and DC bus KM1, the output positive and negative charge of the first rectifying and pressure-regulating module SDC1 is connected respectively to positive pole KM1+ and the negative pole KM1-of DC bus KM1;
Auxiliary direct current source unit: comprise the second rectifying and pressure-regulating module SDC2 and auxiliary DC bus KM2, the output positive and negative charge of the second rectifying and pressure-regulating module SDC2 is connected respectively to positive pole KM2+ and the negative pole KM2-of auxiliary DC bus KM2;
Adjustment unit: comprise adjustable resistor R01 and adjustable resistor R02;
The positive pole KM2+ of described auxiliary DC bus KM2 is connected to the input end of adjustable resistor R01, and the output terminal of adjustable resistor R01 is connected to the first input end of switch S1; The negative pole KM2-of auxiliary DC bus KM2 is connected to the input end of adjustable resistor R02, and the output terminal of adjustable resistor R02 is connected to second input end of switch S1;
The output terminal of described switch S1 is connected to the negative pole KM1-of DC bus KM1.
2. pick-up unit as claimed in claim 1, it is characterized in that, described switch S1 replaces with double-pole switch K5; The output terminal of adjustable resistor R01 and adjustable resistor R02 is connected to positive pole KM1+ and the negative pole KM1-of DC bus KM1 respectively by double-pole switch K5.
3. pick-up unit as claimed in claim 1, it is characterized in that, described auxiliary direct current source unit, adjustment unit and switch S1 replace with signal generator; Signal generator is connected to DC bus KM1.
4. pick-up unit as claimed in claim 1, it is characterized in that, described auxiliary direct current source unit, adjustment unit and switch S1 replace with AC power unit; Described AC power unit comprises AC voltage regulator T1 and switch S2, the input end of AC voltage regulator T1 is connected to isolating transformer, the ac output end of AC voltage regulator T1 is connected to the input end of switch S2, and first output terminal of switch S2 and the second output terminal are connected respectively to positive pole KM1+ and the negative pole KM1-of DC bus KM1.
5. pick-up unit as claimed in claim 1, it is characterized in that, described auxiliary direct current source unit, adjustment unit and switch S1 replace with insulation against ground test cell; Described insulation against ground test cell comprises system capacitance test circuit XT, two or more direct current branch earth resistance circuit ZLi and oscillograph;
Described system capacitance test circuit XT comprises the first tunable capacitor branch road and the second tunable capacitor branch road; First tunable capacitor props up route K switch 01 and adjustable condenser C01 is in series, and one end is connected to the positive pole KM1+ of DC bus KM1, other end ground connection; Second tunable capacitor props up route K switch 02 and adjustable condenser C02 is in series, and one end is connected to the negative pole KM1-of DC bus KM1, other end ground connection;
Described direct current branch earth resistance circuit ZLi comprises the first adjustable resistance branch road and the second adjustable resistance branch road; First adjustable resistance branch road comprises the two ends being parallel to adjustable resistor Ri1 after the K switch i1 of series connection and adjustable resistor Ri1, K switch i3 and adjustable condenser Ci1 connect again; First adjustable resistance branch road one end is connected to the positive pole KM1+ of DC bus KM1, other end ground connection; Second adjustable resistance branch road comprises the two ends being parallel to adjustable resistor Ri2 after the K switch i2 of series connection and adjustable resistor Ri2, K switch i4 and adjustable condenser Ci2 connect again; Second adjustable resistance branch road one end is connected to the negative pole KM1-of DC bus KM1, other end ground connection;
Described oscillograph is connected to DC bus KM1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520129210.0U CN204515113U (en) | 2015-03-06 | 2015-03-06 | Stand with the pick-up unit of DC power system insulation monitoring and warning device |
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| CN201520129210.0U CN204515113U (en) | 2015-03-06 | 2015-03-06 | Stand with the pick-up unit of DC power system insulation monitoring and warning device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104678341A (en) * | 2015-03-06 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Detection device and detection method for station-dedicated DC power system insulation monitoring device |
| CN108549044A (en) * | 2018-03-27 | 2018-09-18 | 广东电网有限责任公司中山供电局 | A kind of transformer station direct current system insulation route selection tester |
| CN110514946A (en) * | 2019-07-12 | 2019-11-29 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of DC earthing experimental rig of high security |
| CN111398729A (en) * | 2020-01-21 | 2020-07-10 | 国网浙江省电力有限公司湖州供电公司 | Intelligent direct-current insulation online monitoring device with grounding positioning function |
| CN111650450A (en) * | 2020-04-03 | 2020-09-11 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
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- 2015-03-06 CN CN201520129210.0U patent/CN204515113U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678341A (en) * | 2015-03-06 | 2015-06-03 | 国网四川省电力公司电力科学研究院 | Detection device and detection method for station-dedicated DC power system insulation monitoring device |
| CN108549044A (en) * | 2018-03-27 | 2018-09-18 | 广东电网有限责任公司中山供电局 | A kind of transformer station direct current system insulation route selection tester |
| CN108549044B (en) * | 2018-03-27 | 2023-08-25 | 广东电网有限责任公司中山供电局 | Insulation line selection tester for direct current system of transformer substation |
| CN110514946A (en) * | 2019-07-12 | 2019-11-29 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of DC earthing experimental rig of high security |
| CN110514946B (en) * | 2019-07-12 | 2021-11-23 | 国网浙江省电力有限公司嘉兴供电公司 | High-safety direct-current grounding test device |
| CN111398729A (en) * | 2020-01-21 | 2020-07-10 | 国网浙江省电力有限公司湖州供电公司 | Intelligent direct-current insulation online monitoring device with grounding positioning function |
| CN111650450A (en) * | 2020-04-03 | 2020-09-11 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
| CN111650450B (en) * | 2020-04-03 | 2022-07-15 | 杭州奥能电源设备有限公司 | Identification method based on direct current mutual string identification device |
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