CN203895977U - Novel bias magnet type arc extinguishing wire coil tuning controller - Google Patents
Novel bias magnet type arc extinguishing wire coil tuning controller Download PDFInfo
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- CN203895977U CN203895977U CN201420166353.4U CN201420166353U CN203895977U CN 203895977 U CN203895977 U CN 203895977U CN 201420166353 U CN201420166353 U CN 201420166353U CN 203895977 U CN203895977 U CN 203895977U
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- arc
- suppression coil
- transformer
- arc extinguishing
- wire coil
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Abstract
The utility model discloses a novel bias magnet type arc extinguishing wire coil tuning controller comprising a dynamic arc extinguishing compensation system consisting of a grounding arc extinguisher, an excitation power source system, an isolation voltage transformer and a core controller. The grounding arc extinguisher consists of a grounding voltage transformer, a bias magnet type arc extinguishing wire coil, a voltage transformer and a current transformer. The grounding voltage transformer is connected to a power grid bus through a connecting switch, an artificial neutral point is led out, the bias magnet type arc extinguishing wire coil is connected between the neutral point and the ground, an excitation current is supplied to the bias magnet type arc extinguishing wire coil by the excitation power source system which is connected with the core controller, and the core controller is connected with the isolation voltage transformer. According to the novel bias magnet type arc extinguishing wire coil tuning controller, a dynamic compensation solution is adopted, and a contradiction between a series resonance problem in normal operating processes and hope of full compensation after grounding operation is solved; according to power grid imbalance, different capacitor current detection technologies are adopted, detection precision is effectively improved, and a dynamic tuning mode is good in effect.
Description
Technical field
The utility model belongs to arc suppression coil technical field, especially a kind of novel arc-suppression coil with magnetic bias tuning controller.
Background technology
The effect of arc suppression coil is after electrical network generation single phase ground fault, and an inductive current compensation of ground capacitance current is provided, and earth current is reduced, and also makes the recovery voltage Speed Reduction at fault phase ground arc two ends, reaches the object of extinguish arcs.Correct when tuning when arc suppression coil, not only can effectively reduce and produce the superpotential probability of arc grounding, the amplitude of over-voltage suppression, has also reduced the voltage rising of fault point heat damage effect and ground network etc. simultaneously to greatest extent effectively.From the effect of performance arc suppression coil, the absolute value of de-humorous degree is the smaller the better, preferably, in full compensating coefficient, is tuned on resonance point.But when electrical network normally moves, the arc suppression coil that is tuned to full compensation can produce dangerous series resonance over-voltage, and this is unallowed.How to solve this contradiction, there are at present two kinds of feasible programs: a kind of method is series damping resistor on arc suppression coil, thereby increase electrical network ratio of damping, when electrical network is normally moved, series resonance over-voltage is less than 15%, so just can arc suppression coil be tuned to full compensating coefficient when electrical network normally moves, wait for the generation of earth fault.After there is single-phase earthing, moment is shorting out damping resistance, thereby realizes the optimal compensation.Another kind method is, strengthens de-humorous degree when electrical network normally moves, and makes arc suppression coil away from resonance point, and after electrical network generation single-phase earthing, instantaneous adjustment arc suppression coil, to full compensating coefficient, is implemented the optimal compensation, and this is dynamic compensation scheme.
Here there are two problems to need to solve, the one, capacitance current is from motion tracking test problems; The 2nd, how to judge whether earth fault disappears, the problem when exciting current exits automatically.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of novel arc-suppression coil with magnetic bias tuning controller is provided, it adopts dynamic compensation scheme, and the series resonance problem that has effectively solved normal when operation is wished the contradiction between full compensation after with ground connection; According to the uneven situation of electrical network, adopt different capacitance current detection techniques, effectively improved accuracy of detection; Dynamic tuning mode is respond well.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of novel arc-suppression coil with magnetic bias tuning controller, comprise the dynamic arc extinction compensation system being formed by ground connection arc arrester, excitation power system, isolating transformer and core controller, described ground connection arc arrester consists of grounding transformer, arc-suppression coil with magnetic bias, voltage transformer summation current transformer, described grounding transformer
By connecting valve, access power network bus, draw artificial neutral point, between described neutral point and ground, access arc-suppression coil with magnetic bias, described arc-suppression coil with magnetic bias provides exciting current by excitation power system, described excitation power system connects core controller, and described core controller connects isolating transformer.
Preferably, described excitation power system is involved amplifier and is formed by power transformer, thyristor, Hall current sensor, silicon controlled toggle, PID adjuster, low pass filtered.
Preferably, described core controller is mainly controlled Voltage-output passage, bus connection switch state and two platform and is transported signaling switch amount input channel, interrupt signal generator circuit and single-chip microcomputer by neutral point displacement voltage analog input channel, excitation and forms.
Advantage of the present utility model and good effect are:
1, the utility model is reasonable in design, and novel arc-suppression coil with magnetic bias tuning controller adopts dynamic compensation scheme, and the series resonance problem while effectively having solved normal operation is wished the contradiction between full compensation after with ground connection; According to the uneven situation of electrical network, adopt different capacitance current detection techniques, effectively improve accuracy of detection; The specific targets that controller reaches are that capacitance current tracking measurement error is less than 2%, and exciting current is raised to the maximum time and is less than 5ms from above freezing, and dynamic compensation transient process is less than 2 cycles, and offset current harmonic content is less than 4%, and power consumption is less than 2%; Dynamic tuning mode is respond well.
Accompanying drawing explanation
Fig. 1 is theory structure block diagram of the present utility model.
In figure, 1, ground connection arc arrester; 2, excitation power system; 3, isolating transformer; 4, core controller; 5, grounding transformer; 6, arc-suppression coil with magnetic bias; 7, voltage transformer; 8, current transformer; 9, switch; 10, power network bus; 11, power transformer; 12, thyristor; 13, Hall current sensor; 14, silicon controlled toggle; 15, PID adjuster; 16, low pass filtered involves amplifier.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is further described:
A kind of novel arc-suppression coil with magnetic bias tuning controller, as shown in Figure 1: comprise by ground connection arc arrester 1, excitation power system 2, the dynamic arc extinction compensation system that isolating transformer 3 and core controller 4 form, described ground connection arc arrester 1 is by grounding transformer 5, arc-suppression coil with magnetic bias 6, voltage transformer 7 summation current transformers 8 form, described grounding transformer 5 is by connecting valve 9 access power network buses 10, draw artificial neutral point, between described neutral point and ground, access arc-suppression coil with magnetic bias 6, described arc-suppression coil with magnetic bias 6 provides exciting current by excitation power system 2, described excitation power system 2 connects core controller 4, described core controller 4 connects isolating transformer 3.Described excitation power system 2 involves amplifier 16 by power transformer 11, thyristor 12, Hall current sensor 13, silicon controlled toggle 14, PID adjuster 15, low pass filtered and forms; Described core controller 4 is mainly controlled Voltage-output passage, bus connection switch state and two platform and is transported signaling switch amount input channel, interrupt signal generator circuit and single-chip microcomputer by neutral point displacement voltage analog input channel, excitation and forms.
In conjunction with Fig. 1, set forth operation principle of the present utility model:
Dynamic tuning principle: the process that control arc-suppression coil with magnetic bias is implemented dynamic arc extinction compensation is: under electrical network normal operating condition, follow the tracks of detection of grid capacitance current, the exciting current of arc suppression coil maintains a very little value or is zero, and arc suppression coil is away from resonance point.After electrical network generation single-phase earthing, apply fast excitation, tuning peterson coil is realized full compensation.Ground connection is got back to tracking detected state after eliminating.
The detection of capacitance current in height balance electrical network: can be continuously and the feature of fine adjustment inductance value for novel arc-suppression coil with magnetic bias, in the electrical network of height balance, can take to be similar to resonance ratio juris.By continuous adjusting arc suppression coil inductance value, make the displacement of neutral point power-frequency voltage reach maximum, now the induction reactance of arc suppression coil just equals total capacitive reactance over the ground of electrical network.And arc-suppression coil with magnetic bias is linear in low pressure stage voltage-current characteristic, by controlling, electric current is unique to be determined inductance value.Therefore only need the size by comparative voltage and without the concrete numerical value of Accurate Measurement, just can determine control current values corresponding when the displacement of neutral point power-frequency voltage reaches maximum, thereby and then the always capacitive reactance over the ground of definite electrical network calculate the size of capacitance current.
Dynamically arc extinction compensation system consists of ground connection arc arrester, excitation power system, isolating transformer and core controller.Grounding transformer access power network bus, draw artificial neutral point, between neutral point and ground, access arc-suppression coil with magnetic bias, arc-suppression coil with magnetic bias provides exciting current by excitation power system, the size of exciting current depends on the output voltage of core controller, and core controller is through the continuous monitoring of centering point displacement voltage amplitude, and the capacitance current of realizing under electrical network normal operating condition detects from motion tracking, dynamic compensation under failure operation state, the recovery certainly after fault disappears etc.
Excitation power system is comprised of power transformer, controllable silicon full-wave bridge rectifier circuit, fast acting fuse, shunt and rc protection circuit.Control circuit by synchrotrans, full-wave rectification trigger impulse form circuit, pulse amplifying circuit, PID adjuster, low pass filter, amplifier and LM suddenly ear current sensor form, wherein signal is used for controlling full-wave rectification trigger impulse output.Exciting current adopts closed-loop control.Exciting current is from the maximum that is raised to above freezing, and the time is less than 5ms.
Core controller is mainly by neutral point displacement voltage analog input channel, and excitation is controlled voltage U r output channel, and bus connection switch state and two platform are also transported signaling switch amount input channel, interrupt signal generator circuit, and single-chip microcomputer forms.
Single-chip microcomputer is by output voltage, and sampled signal realizes capacitance current and detects, and according to the capacitance current detection sensitivity of setting, whether again sample voltage value, determine Detection capacitance electric current according to its variable quantity; Gather switching value input message, the operation of judgement separate unit or two platform fortune; By serial communication, to host computer, transmit arc suppression coil normal operating condition information; Read keypad information and process Routine Management work; Wait earth fault occurs.
After there is single-phase earthing, interrupt signal generator circuit sends interrupt signal, single-chip microcomputer is carried out interrupt routine, open excitation system pulse output control gate, exciting current rises to required numerical value in 5ms, arc suppression coil is implemented full compensation, and alarm signal occurs simultaneously, and to host computer, transmits ground state information by serial communication; Single-chip microcomputer judges electric network state comprehensively, through repeatedly relatively and after delay process, in the situation that definite fault disappears completely, exits excitation, turns back to detected state.Bus connection switch state and two platform are also transported signal and are used for setting control system for two platforms and transport state, in this case, allow two cover dynamic compensating systems in an electrical network, to move simultaneously.
Novel arc-suppression coil with magnetic bias tuning controller adopts dynamic compensation scheme, and the series resonance problem while effectively having solved normal operation is wished the contradiction between full compensation after with ground connection; According to the uneven situation of electrical network, adopt different capacitance current detection techniques, effectively improve accuracy of detection; The specific targets that controller reaches are that capacitance current tracking measurement error is less than 2%, and exciting current is raised to the maximum time and is less than 5ms from above freezing, and dynamic compensation transient process is less than 2 cycles, and offset current harmonic content is less than 4%, and power consumption is less than 2%; Dynamic tuning mode is respond well.
It is emphasized that; embodiment described in the utility model is illustrative; rather than determinate; therefore the utility model is not limited to the embodiment described in embodiment; every other execution modes that drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope that the utility model is protected equally.
Claims (3)
1. a novel arc-suppression coil with magnetic bias tuning controller, it is characterized in that: comprise by ground connection arc arrester, excitation power system, the dynamic arc extinction compensation system that isolating transformer and core controller form, described ground connection arc arrester is by grounding transformer, arc-suppression coil with magnetic bias, voltage transformer summation current transformer forms, described grounding transformer accesses power network bus by connecting valve, draw artificial neutral point, between described neutral point and ground, access arc-suppression coil with magnetic bias, described arc-suppression coil with magnetic bias provides exciting current by excitation power system, described excitation power system connects core controller, described core controller connects isolating transformer.
2. novel arc-suppression coil with magnetic bias tuning controller according to claim 1, is characterized in that: described excitation power system is involved amplifier and formed by power transformer, thyristor, Hall current sensor, silicon controlled toggle, PID adjuster, low pass filtered.
3. novel arc-suppression coil with magnetic bias tuning controller according to claim 1, is characterized in that: described core controller is mainly controlled Voltage-output passage, bus connection switch state and two platform and transported signaling switch amount input channel, interrupt signal generator circuit and single-chip microcomputer by neutral point displacement voltage analog input channel, excitation and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420166353.4U CN203895977U (en) | 2014-05-26 | 2014-05-26 | Novel bias magnet type arc extinguishing wire coil tuning controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420166353.4U CN203895977U (en) | 2014-05-26 | 2014-05-26 | Novel bias magnet type arc extinguishing wire coil tuning controller |
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| CN203895977U true CN203895977U (en) | 2014-10-22 |
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| CN201420166353.4U Expired - Fee Related CN203895977U (en) | 2014-05-26 | 2014-05-26 | Novel bias magnet type arc extinguishing wire coil tuning controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322527A (en) * | 2014-05-26 | 2016-02-10 | 陈其钗 | Novel magnetic-biasing arc extinguishing coil tuning controller |
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2014
- 2014-05-26 CN CN201420166353.4U patent/CN203895977U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322527A (en) * | 2014-05-26 | 2016-02-10 | 陈其钗 | Novel magnetic-biasing arc extinguishing coil tuning controller |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20150526 |
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| EXPY | Termination of patent right or utility model |