CN102570420A - System for application of resistor to resonant grounding system - Google Patents
System for application of resistor to resonant grounding system Download PDFInfo
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- CN102570420A CN102570420A CN2011104503951A CN201110450395A CN102570420A CN 102570420 A CN102570420 A CN 102570420A CN 2011104503951 A CN2011104503951 A CN 2011104503951A CN 201110450395 A CN201110450395 A CN 201110450395A CN 102570420 A CN102570420 A CN 102570420A
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Abstract
The invention discloses a system for the application of a resistor to a resonant grounding system. The system comprises a neutral point and a control circuit. The control circuit comprises a voltage transformer circuit, a current transformer circuit and a side parallel circuit, which are sequentially connected in parallel. The voltage transformer circuit comprises a grounded voltage transformer. The current transformer circuit comprises a neutral point isolation switch, a controlled reactor, a current transformer, an automatic control parallel resistance switch and an automatic control parallel resistor, wherein the neutral point isolation switch, the controlled reactor and the current transformer are sequentially connected in series; and the automatic control parallel resistance switch and the automatic control parallel resistor are connected in series with each other. The side parallel circuit comprises a side parallel switch and a side parallel resistor, which are sequentially connected in series, wherein the side parallel resistor is grounded. Capacitance current can be accurately measured in real time; a damping ratio is automatically regulated, so that the system is adapted to the working conditions of a power system in different periods, the whole device and a power grid reach an optimal state, and the stability of the system is improved; and the system for the application of the resistor to the resonant grounding system is widely applied in the technical field of power systems.
Description
Technical field
The present invention relates to technical field of power systems, particularly relate to the application system of resistance in resonant earthed system.
Background technology
Earth neutral system is exactly neutral-point solid ground or through the system of low resistance grounding, also claims big grounding current system.During a phase ground connection, another earth point except that neutral point occurs in this system, constituted short-circuit loop, the earth fault phase current is very big, in order to prevent device damage, must cut off the electricity supply rapidly, thereby power supply reliability is low, easy generation power outage.But when single phase ground fault takes place in this system,, thereby be favourable to system insulation because the clamping action of system neutral makes the voltage to earth of non-fault phase not have tangible rising.Resonant earthed system is wherein a kind of of earth neutral system, and controlled reactor is arc suppression coil in this system.
Existing capacitance current measurement technology is generally single, and two-point method, line-of-sight course, injection current method, voltage-phase method etc. are in the automatic measurement scheme of the common tradition of resonant earthed system.Current capacitance current detection scheme, according to the controlled reactor of different adjustment mode all have problems as: the capacitance current sense cycle is long, precision is not high; The number of times of transferring the files is too much, has shortened the loaded switch life-span; Need the artificial bias voltage of regulating.
Existing variant projects of location is a paraller resistanc method.It utilizes control and controlled reactor parallel resistor to carry out route selection or tripping operation etc., but it fails to give full play to the effect of secondary damping resistance, has caused the wasting of resources, has increased the loss of system simultaneously, and there is potential harm in operation to system.
Existing damping scheme is for when dispatching from the factory, in primary side or secondary side serial or parallel connection one fixed resistance value.This fixed resistance value possibly need artificial adjustment resistance value when system capacitive current changes, make troubles to operation.
Summary of the invention
For addressing the above problem, the present invention provide a kind of stable, fast, accurately, the application system of resistance in resonant earthed system flexibly.
The technical solution adopted for the present invention to solve the technical problems is:
The application system of resistance in resonant earthed system; Comprise neutral point and control circuit; Said control circuit is connected on the neutral point, and said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively, and said mutual induction of voltage circuit comprises the voltage transformer of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch, controlled reactor, the current transformer of series connection successively; Automatic control parallel resistance switch that also comprises mutual series connection and control parallel resistance automatically, said automatic control parallel resistance switch and control automatically parallel resistance be connected in parallel on the controlled reactor or be connected on controlled reactor and current transformer between, said current transformer ground connection; Said side parallel circuits comprises the side paralleling switch and the side parallel resistance of series connection successively, side parallel resistance ground connection.
Further, said controlled reactor is wherein a kind of of traditional mechanical formula controlled reactor, magnet controlled reactor, thyristor-controlled reactor, PWM control reactor or superconductive controllable reactor.
Further, said automatic control parallel resistance switch is at least one group of switch that is cascaded and resistance with controlling parallel resistance automatically.
Beneficial effect of the present invention: the application system of resistance of the present invention in resonant earthed system comprises neutral point and control circuit; Said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively; The present invention can measure the capacitance current of electric power system quickly and accurately; And can significantly reduce the frequency of utilization of the main vulnerable equipment of part in the complete sets of equipment, thereby prolong the life-span of equipment; Can self-adaptive electric power system's different phase to the requirement of ratio of damping, reduces in servicely, need the artificial drawback of adjusting; Resistance through being parallel to controlled reactor or route selection result detect the excision that earth fault line and kinds of schemes are grounded faulty line.
Description of drawings
Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:
Fig. 1 is the application system parallel connection scheme modular structure figure of resistance of the present invention in resonant earthed system;
Fig. 2 is the application system parallel connection scheme electrical block diagram of resistance of the present invention in resonant earthed system;
Fig. 3 is the application system tandem plan modular structure figure of resistance of the present invention in resonant earthed system;
Fig. 4 is the application system tandem plan electrical block diagram of resistance of the present invention in resonant earthed system.
Among the figure: neutral point 1, voltage transformer 11, side paralleling switch 12, side parallel resistance 13, neutral point isolating switch 14, controlled reactor 15, current transformer 16, automatically control parallel resistance switch 17, control parallel resistance 18, channel selector 19 automatically.
Embodiment
With reference to Fig. 1, Fig. 2; The application system of resistance in resonant earthed system; Comprise neutral point 1 and control circuit; Said control circuit is connected on the neutral point 1, and said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively, and said mutual induction of voltage circuit comprises the voltage transformer 11 of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch 14, controlled reactor 15, the current transformer 16 of series connection successively; Also comprise the automatic control parallel resistance switch 17 of mutual series connection and control parallel resistance 18 automatically, said automatic control parallel resistance switch 17 and control automatically parallel resistance 18 be connected in parallel on the controlled reactor 15 or be connected on controlled reactor 15 and current transformer 16 between, said current transformer 16 ground connection; Said side parallel circuits comprises the side paralleling switch 12 and side parallel resistance 13 of series connection successively, side parallel resistance 13 ground connection.
With reference to Fig. 3; The application system of resistance in resonant earthed system comprises neutral point 1 and control circuit, and said control circuit is connected on the neutral point 1; Said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively; Said mutual induction of voltage circuit comprises the voltage transformer 11 of a ground connection, and said electric current mutual inductance circuit comprises neutral point isolating switch 14, controlled reactor 15, the current transformer 16 of series connection successively, also comprises the automatic control parallel resistance switch 17 of mutual series connection and controls parallel resistance 18 automatically; Said automatic control parallel resistance switch 17 is connected in parallel on the controlled reactor 15 with automatic control parallel resistance 18; Said current transformer 16 ground connection, said side parallel circuits comprise the side paralleling switch 12 and side parallel resistance 13 of series connection successively, side parallel resistance 13 ground connection.
Further as preferred embodiment, said controlled reactor 15 be that traditional mechanical formula controlled reactor, magnet controlled reactor, thyristor-controlled reactor, PWM are controlled wherein a kind of of reactor or superconductive controllable reactor.
Further as preferred embodiment, said automatic control parallel resistance switch 17 is at least one group of switch that is cascaded and resistance with controlling parallel resistance 18 automatically.
Further as preferred embodiment, control the opening of said automatic control parallel resistance switch 17, electric capacity and electric current that closure can be measured electric power system.
Further as preferred embodiment, control the opening of said automatic control parallel resistance switch 17, closure can make the complete sets of equipment adapt to the variation of electric power system automatically, makes ratio of damping remain on optimum state.
Further as preferred embodiment, controlling the opening of said automatic control parallel resistance switch 17, closure can be when electric power system generation earth fault, through the active power method carry out fast, repeatedly route selection.
Further as preferred embodiment, control the opening of said side paralleling switch 12, closure can when electric power system generation earth fault, realize active power method route selection or tripping operation under different setting resistance values.
With reference to Fig. 4; The application system of resistance in resonant earthed system; Comprise neutral point 1 and control circuit; Said control circuit is connected on the neutral point 1, and said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively, and said mutual induction of voltage circuit comprises the voltage transformer 11 of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch 14, controlled reactor 15, the current transformer 16 of series connection successively; Also comprise the automatic control parallel resistance switch 17 of mutual series connection and control parallel resistance 18 automatically, said automatic control parallel resistance switch 17 and control parallel resistance 18 automatically and be connected between controlled reactor 15 and the current transformer 16 said current transformer 16 ground connection; Said side parallel circuits comprises the side paralleling switch 12 and side parallel resistance 13 of series connection successively, side parallel resistance 13 ground connection.
Further as preferred embodiment, parallelly connected with automatic control parallel resistance switch 17 and control parallel resistance automatically 18 channel selector 19, channel selector 19 is opened, and does not insert resistance; Switch breaks off, and is inserted the size of resistance by automatic control parallel resistance switch 17 decisions.
Certainly; The present invention is not limited to above-mentioned execution mode; Those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite of spirit of the present invention, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (3)
1. the application system of resistance in resonant earthed system; Comprise neutral point (1) and control circuit; Said control circuit is connected on the neutral point (1); It is characterized in that: said control circuit comprises mutual induction of voltage circuit, electric current mutual inductance circuit and the side parallel circuits of parallel connection successively; Said mutual induction of voltage circuit comprises the voltage transformer (11) of a ground connection; Said electric current mutual inductance circuit comprises neutral point isolating switch (14), controlled reactor (15), the current transformer (16) of series connection successively; Also comprise the automatic control parallel resistance switch (17) of mutual series connection and automatic control parallel resistance (18), said automatic control parallel resistance switch (17) and control parallel resistance (18) automatically are connected in parallel on controlled reactor (15) upward or be connected between controlled reactor (15) and the current transformer (16) said current transformer (16) ground connection; Said side parallel circuits comprises the side paralleling switch (12) and the side parallel resistance (13) of series connection successively, side parallel resistance (13) ground connection.
2. the application system of resistance according to claim 1 in resonant earthed system is characterized in that: said controlled reactor (15) is wherein a kind of of traditional mechanical formula controlled reactor, magnet controlled reactor, thyristor-controlled reactor, PWM control reactor or superconductive controllable reactor.
3. the application system of resistance according to claim 1 in resonant earthed system is characterized in that: said automatic control parallel resistance switch (17) and automatic control parallel resistance (18) are at least one group of switch that is cascaded and resistance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205625542U CN202405772U (en) | 2011-12-29 | 2011-12-29 | Application system of resistor in resonant earthed system |
| CN2011104503951A CN102570420A (en) | 2011-12-29 | 2011-12-29 | System for application of resistor to resonant grounding system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205625542U CN202405772U (en) | 2011-12-29 | 2011-12-29 | Application system of resistor in resonant earthed system |
| CN2011104503951A CN102570420A (en) | 2011-12-29 | 2011-12-29 | System for application of resistor to resonant grounding system |
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| Publication Number | Publication Date |
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| CN102570420A true CN102570420A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104503951A Pending CN102570420A (en) | 2011-12-29 | 2011-12-29 | System for application of resistor to resonant grounding system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208788A (en) * | 2013-03-08 | 2013-07-17 | 李景禄 | Intelligent dynamic power distribution network neutral-point grounding method and complete device |
| CN104852468A (en) * | 2015-04-21 | 2015-08-19 | 国家电网公司 | Distribution network line ground fault line selection and assorted device using controllable simulated load |
| CN113224739A (en) * | 2021-04-19 | 2021-08-06 | 国网江苏省电力有限公司检修分公司 | Current limiting device for grounding time of grounding wire of synchronous phase modulator |
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| CN101075738A (en) * | 2007-06-14 | 2007-11-21 | 思源电气股份有限公司 | System for removing damp resistance discharging secondary arc-eliminating coil and its resonance |
| CN101242097A (en) * | 2008-03-11 | 2008-08-13 | 昆明理工大学 | Failure line selection method of small current ground system by using simulation after zero mode current measure |
| CN101551433A (en) * | 2009-05-05 | 2009-10-07 | 昆明理工大学 | Distribution network feed out circuit fault circuit selection method by using HHT detection technology |
| CN202405772U (en) * | 2011-12-29 | 2012-08-29 | 广东中钰科技有限公司 | Application system of resistor in resonant earthed system |
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2011
- 2011-12-29 CN CN2011104503951A patent/CN102570420A/en active Pending
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| CN101075738A (en) * | 2007-06-14 | 2007-11-21 | 思源电气股份有限公司 | System for removing damp resistance discharging secondary arc-eliminating coil and its resonance |
| CN101242097A (en) * | 2008-03-11 | 2008-08-13 | 昆明理工大学 | Failure line selection method of small current ground system by using simulation after zero mode current measure |
| CN101551433A (en) * | 2009-05-05 | 2009-10-07 | 昆明理工大学 | Distribution network feed out circuit fault circuit selection method by using HHT detection technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208788A (en) * | 2013-03-08 | 2013-07-17 | 李景禄 | Intelligent dynamic power distribution network neutral-point grounding method and complete device |
| CN103208788B (en) * | 2013-03-08 | 2015-11-04 | 李景禄 | Intelligent Dynamic power network neutral point earthing method and the complete sets of equipment |
| CN104852468A (en) * | 2015-04-21 | 2015-08-19 | 国家电网公司 | Distribution network line ground fault line selection and assorted device using controllable simulated load |
| CN113224739A (en) * | 2021-04-19 | 2021-08-06 | 国网江苏省电力有限公司检修分公司 | Current limiting device for grounding time of grounding wire of synchronous phase modulator |
| CN113224739B (en) * | 2021-04-19 | 2024-02-09 | 国网江苏省电力有限公司检修分公司 | Current limiting device for grounding time of grounding wire of synchronous camera |
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Application publication date: 20120711 |