CN104795818A - Remote power-feeding power generator and remote power-feeding fault locating method - Google Patents
Remote power-feeding power generator and remote power-feeding fault locating method Download PDFInfo
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Abstract
The invention discloses a remote power-feeding power generator and a remote power-feeding fault locating method, belongs to the technical field of remote power feeding and solves the problems of difficulty in confirming faults in a remote power-feeding system and difficulty in fault locating. The remote power-feeding power generator comprises an input terminal, an output terminal, a lightning arrester, an isolating transformer, a T-connection transformer, a variable capacitor array, a fixed capacitor, a self-coupling boost transformer, an EMI (electro-magnetic interference) filter lightning arrester, a sampling circuit, a controller, a power line carrier modulation and demodulation circuit and a fault detection controller. The remote power-feeding fault locating method includes that the remote power-feeding power generator is applied to remote power feeding, an alternating-current power supply is connected to the input end of the remote power-feeding power generator, and the output end of the power-feeding power generator is connected to a load through a power converter.
Description
Technical field
The present invention relates to a kind of remote power-feeding technical field, specifically the method for remote power-feeding power source generator and remote power-feeding fault location.
Background technology
The various watch-dog of highway generally adopt concentrate or Relatively centralized power, power supply used is drawn from power plant or high-voltage fence in the neighbourhood, deliver to the electric substation of highway oneself, produce 220V or 380V alternating current through low-tension transformer, powered to remote monitor equipment by power cable afterwards.
Supply power mode in Expressway Mechanical & Electrical Project is banding type, and power supply distance is long, and load is relatively little and disperse.Its transformer station is generally arranged in administrative center, charge station, service area or maintenance work area, and supply cell is 20-30 kilometer.For the transmission of electricity of middle and long distance, the remote power system that variant manufacturers design is different, adopts direct current or exchange way to power to Highways ' equipment.As: d. c. remote electric power system and method (patent No.: 201010128050X), a kind of highly reliable constant current for highway remote power-feeding turn the constant-voltage equipment (patent No.: 2013107529685) etc.
The remote distribution system of highway, there is the unique characteristics such as work under bad environment, maintenance work is complicated, fault location is difficult, transmitting range is long, load power demand is different, therefore its power supply-distribution system not only will solve an above-mentioned difficult problem, high stability to be had, to guarantee the normal work of highway Mechatronic Systems simultaneously.In current highway, existing remote power system mainly adopts direct voltage power distribution network or alternating voltage power distribution network, and in use voltage distribution mode, can produce many deficiencies:
1) far-end of remote power system, especially near end, be short-circuited or open circuit fault time, system voltage change is less, power supply generator is difficult to perception, cause fault be difficult to confirm and fault location extremely difficult, even easily therefore there is security incident;
2) adopt the remote power system of direct voltage power distribution network, in order to adapt to unequally loaded power supply requirement, most time needs to increase DC/AC direct current to the modular converter exchanged, and reduces the service efficiency of power supply, adds fault point.
Summary of the invention
Technical assignment of the present invention is for above deficiency, provides the method for remote power-feeding power source generator and remote power-feeding fault location, solves the problem that fault in remote power system is difficult to confirmation and fault location difficulty.
Technical assignment of the present invention realizes in the following manner,
Remote power-feeding power source generator, comprises input, output, lightning protection device, isolating transformer, T connects transformer, variable capacitor array, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, sample circuit, controller, power carrier modulation-demodulation circuit, Failure Detection Controller; Sample circuit comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Input, lightning protection device, isolating transformer, T connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output are connected successively; Variable capacitor array in parallel connects the secondary side of transformer in T; Controller controls variable capacitor array and self coupling step-up transformer by control signal; Voltage sampling circuit I is connected to the secondary side of isolating transformer and T connects between the primary side of transformer, and voltage sampling circuit I connection control device; The equal connection control device in one end of voltage sampling circuit II and current sampling circuit, the other end is connected to output; Failure Detection Controller to be communicated with power carrier modulation-demodulation circuit by bus and controls; Power carrier modulation-demodulation circuit one end connects Failure Detection Controller, and the other end is connected to output.
Remote power-feeding power source generator, AC power is connected to the input of remote power-feeding power source generator, and the output of remote power-feeding power source generator is connected to load by power supply changeover device;
Lightning protection device: for tackling the thunderbolt interference under open-air conditions;
Isolating transformer: for making remote power-feeding power source generator and external electrical network electrical isolation;
T connects transformer: for the three-phase alternating voltage of input is become single-phase AC voltage;
Variable capacitor array: for changing capacitance size, when the three-phase alternating current generation phase shift inputted or phase shortage, adjustment exports phase place;
Fixed capacitor: for filtering high frequency spurs;
Self coupling step-up transformer: regulate for carrying out boosting to input voltage by different no-load voltage ratio according to loading condition;
EMI filtering lightning protection device: for carrying out EMI filtering and lightning protection function to output;
Sample circuit: for sampling to input and output voltage or electric current, complete FEEDBACK CONTROL, comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Controller: the sampled value according to sample circuit controls variable capacitor array and self coupling step-up transformer;
Power carrier modulation-demodulation circuit: for being communicated with remote power-feeding power source generator by power line carrier;
Failure Detection Controller: the failure condition according to power carrier modulation-demodulation circuit feedback controls remote power-feeding power source generator, disengagement failure circuit.
Remote power-feeding power source generator, self coupling step-up transformer is single-phase self-coupling step-up transformer.
Remote power-feeding power source generator, controller is MCU or DSP.
Remote power-feeding power source generator, variable capacitor array comprises the multiple different array capacitor be connected in parallel, each array is equipped with a controllable silicon, and this controllable silicon is controlled by the control signal of described controller, and controllable silicon is for being incorporated to or disconnecting the capacitor array at place.
Remote power-feeding power source generator, self coupling step-up transformer comprises the input and output with multiple tap, and each tap is equipped with a controllable silicon, and this controllable silicon is controlled by the control signal of described controller, access for input voltage adjusts, and controllable silicon is used for opening or disconnect place tap.
The method of remote power-feeding fault location, by any one above-mentioned remote power-feeding power source generator, be applied in remote power-feeding, the method for its fault location comprises the steps:
(1), by AC power be connected to the input of remote power-feeding power source generator, the output of remote power-feeding power source generator is connected to load by power supply changeover device;
(2), AC power is connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output by input, lightning protection device, isolating transformer, T, then is exported to load supplying by power supply changeover device;
(3), power line carrier, PLC is passed through between power carrier modulation-demodulation circuit and power supply changeover device, the operating state of power carrier modulation-demodulation circuit real-time collecting power supply changeover device, signal is communicated with Failure Detection Controller by bus, is judged by the line fault of Failure Detection Controller to load;
When Failure Detection Controller confirms the line fault that load occurs, localizing faults load, control strategy is issued power carrier modulation-demodulation circuit by bus by Failure Detection Controller, and power carrier modulation-demodulation circuit controls by power carrier the circuit that power supply changeover device corresponding to load fault cuts off this load;
(4), voltage sampling circuit II and current sampling circuit collection know that the bearing power of output changes, Information Monitoring is passed to controller by voltage sampling circuit II and current sampling circuit, controller sends control strategy and control signal is transferred to self coupling step-up transformer, self coupling step-up transformer adjustment power output and idle content, guarantee accurate voltage stabilizing and the power quality of output voltage;
(5), voltage sampling circuit I detects the three-phase input voltage of AC power, if there is AC power phase shift or phase shortage, then voltage sampling circuit I gathers and the information of collection is issued controller, controller sends control strategy and control signal is transferred to variable capacitor array, variable capacitor array changing capacitance, guarantees that the secondary side that T connects transformer exports as stable voltage signal.
The method of remote power-feeding fault location, load is the load of multiple parallel connection, and each load is connected to the output of remote power-feeding power source generator by respective power supply changeover device.
The method of remote power-feeding fault location, in step (3), the line fault of load comprises short trouble or open circuit fault.
The method of remote power-feeding fault location, AC power is that 380VAC three-phase voltage is inputted by input; The thunderbolt interference under secondary degree of protection reply open-air conditions is adopted by lightning protection device; By isolating transformer and external electrical network electrical isolation; T connects transformer and 380V three-phase alternating voltage is become 220V single-phase AC voltage; Fixed capacitor has compensate function, filtering high frequency spurs; Self coupling step-up transformer carries out boosting to input voltage by different no-load voltage ratio according to loading condition and regulates; EMI filtering lightning protection device carries out EMI filtering and lightning protection function to output; Output exports the single-phase AC voltage of 800 ~ 1600VAC; The AC constant voltage source that the single-phase AC voltage of 800 ~ 1600VAC is converted to 220V is powered to load by power supply changeover device.
The method of remote power-feeding power source generator of the present invention and remote power-feeding fault location has the following advantages:
(1), remote power-feeding power source generator without high frequency switching device, equipment dependability is high;
(2), remote power-feeding power source generator has the control of voltage-phase inner ring, by the accurate control phase of variable capacitor array; Controller control strategy generates control signal, reach the Linear Control to variable capacitor array, transformer is connect in conjunction with T, single-phase voltage-phase and the power supply output quality of transformer can be connect by accurate control T, for subsequent conditioning circuit provides good input signal basis when AC power generation phase shift or phase shortage;
(3), remote power-feeding power source generator has power outer shroud and controls, and according to load variations adjustment equipment power output, promotes utilization rate of electrical; Controller controls self coupling step-up transformer by control signal and adjusts power output and idle content, guarantees accurate voltage stabilizing and the power quality of output voltage;
(4), load stabilization time, system works is at linear condition, and stability is high;
(5), load changing time, equipment power output slowly promotes, and effectively reduces load to the impact of remote power-feeding power source generator, the stability of further raising system;
(6) remote power-feeding power source generator has voltage inter-loop control, by accurately controlling output voltage by self coupling step-up transformer.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Accompanying drawing 1 is the circuit structure block diagram of remote power-feeding power source generator;
Accompanying drawing 2 is remote power-feeding power source generator using state connection block diagram.
Embodiment
Be described in detail below with reference to Figure of description and the method for specific embodiment to remote power-feeding power source generator of the present invention and remote power-feeding fault location.
Embodiment 1:
Remote power-feeding power source generator of the present invention, its structure comprises input, output, lightning protection device, isolating transformer, T connect transformer, variable capacitor array, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, sample circuit, controller, power carrier modulation-demodulation circuit, Failure Detection Controller; Sample circuit comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Input, lightning protection device, isolating transformer, T connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output are connected successively; Variable capacitor array in parallel connects the secondary side of transformer in T; Controller controls variable capacitor array and self coupling step-up transformer by control signal; Voltage sampling circuit I is connected to the secondary side of isolating transformer and T connects between the primary side of transformer, and voltage sampling circuit I connection control device; The equal connection control device in one end of voltage sampling circuit II and current sampling circuit, the other end is connected to output; Failure Detection Controller to be communicated with power carrier modulation-demodulation circuit by bus and controls; Power carrier modulation-demodulation circuit one end connects Failure Detection Controller, and the other end is connected to output.
AC power is connected to the input of remote power-feeding power source generator, and the output of remote power-feeding power source generator is connected to load by power supply changeover device;
Lightning protection device: for tackling the thunderbolt interference under open-air conditions;
Isolating transformer: for making remote power-feeding power source generator and external electrical network electrical isolation;
T connects transformer: for the three-phase alternating voltage of input is become single-phase AC voltage;
Variable capacitor array: for changing capacitance size, when the three-phase alternating current generation phase shift inputted or phase shortage, adjustment exports phase place;
Fixed capacitor: for filtering high frequency spurs;
Self coupling step-up transformer: regulate for carrying out boosting to input voltage by different no-load voltage ratio according to loading condition;
EMI filtering lightning protection device: for carrying out EMI filtering and lightning protection function to output;
Sample circuit: for sampling to input and output voltage or electric current, complete FEEDBACK CONTROL, comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Controller: the sampled value according to sample circuit controls variable capacitor array and self coupling step-up transformer;
Power carrier modulation-demodulation circuit: for being communicated with remote power-feeding power source generator by power line carrier;
Failure Detection Controller: the failure condition according to power carrier modulation-demodulation circuit feedback controls remote power-feeding power source generator, disengagement failure circuit.
Controller is MCU.
Controller realizes following function: A, realize the translation function of analog quantity to digital quantity; B, real-time tracking three-phase input voltage value, calculate tracking error value, exporting control signal, for adjusting the capacitance of variable capacitor array, realizing the accurate control of voltage-phase; C, real-time tracking output voltage and current value, thus calculate power output, and contrast the idle content of current system, exporting control signal, for controlling self coupling step-up transformer, realizing the adjustment of output voltage and apparent power, improve utilization rate of electrical.
Embodiment 2:
Remote power-feeding power source generator of the present invention, comprises input, output, lightning protection device, isolating transformer, T connects transformer, variable capacitor array, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, sample circuit, controller, power carrier modulation-demodulation circuit, Failure Detection Controller; Sample circuit comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Input, lightning protection device, isolating transformer, T connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output are connected successively; Variable capacitor array in parallel connects the secondary side of transformer in T; Controller controls variable capacitor array and self coupling step-up transformer by control signal; Voltage sampling circuit I is connected to the secondary side of isolating transformer and T connects between the primary side of transformer, and voltage sampling circuit I connection control device; The equal connection control device in one end of voltage sampling circuit II and current sampling circuit, the other end is connected to output; Failure Detection Controller to be communicated with power carrier modulation-demodulation circuit by bus and controls; Power carrier modulation-demodulation circuit one end connects Failure Detection Controller, and the other end is connected to output.
AC power is connected to the input of remote power-feeding power source generator, and the output of remote power-feeding power source generator is connected to load by power supply changeover device;
Lightning protection device: for tackling the thunderbolt interference under open-air conditions;
Isolating transformer: for making remote power-feeding power source generator and external electrical network electrical isolation;
T connects transformer: for the three-phase alternating voltage of input is become single-phase AC voltage;
Variable capacitor array: for changing capacitance size, when the three-phase alternating current generation phase shift inputted or phase shortage, adjustment exports phase place;
Fixed capacitor: for filtering high frequency spurs;
Self coupling step-up transformer: regulate for carrying out boosting to input voltage by different no-load voltage ratio according to loading condition;
EMI filtering lightning protection device: for carrying out EMI filtering and lightning protection function to output;
Sample circuit: for sampling to input and output voltage or electric current, complete FEEDBACK CONTROL, comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Controller: the sampled value according to sample circuit controls variable capacitor array and self coupling step-up transformer;
Power carrier modulation-demodulation circuit: for being communicated with remote power-feeding power source generator by power line carrier;
Failure Detection Controller: the failure condition according to power carrier modulation-demodulation circuit feedback controls remote power-feeding power source generator, disengagement failure circuit.
Self coupling step-up transformer is single-phase self-coupling step-up transformer.
Controller is DSP.
Variable capacitor array comprises the multiple different array capacitor be connected in parallel, and each array is equipped with a controllable silicon, and this controllable silicon is controlled by the control signal of described controller, and controllable silicon is for being incorporated to or disconnecting the capacitor array at place.
Self coupling step-up transformer comprises the input and output with multiple tap, and each tap is equipped with a controllable silicon, and this controllable silicon is controlled by the control signal of described controller, and the access for input voltage adjusts, and controllable silicon is used for opening or disconnect place tap.
Embodiment 3:
The method of remote power-feeding fault location of the present invention, by remote power-feeding power source generator, be applied in remote power-feeding, the method for its fault location comprises the steps:
(1), by AC power be connected to the input of remote power-feeding power source generator, the output of remote power-feeding power source generator is connected to load by power supply changeover device;
(2), AC power is connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output by input, lightning protection device, isolating transformer, T, then is exported to load supplying by power supply changeover device;
(3), power line carrier, PLC is passed through between power carrier modulation-demodulation circuit and power supply changeover device, the operating state of power carrier modulation-demodulation circuit real-time collecting power supply changeover device, signal is communicated with Failure Detection Controller by bus, is judged by the line fault of Failure Detection Controller to load;
When Failure Detection Controller confirms the line fault that load occurs, localizing faults load, control strategy is issued power carrier modulation-demodulation circuit by bus by Failure Detection Controller, and power carrier modulation-demodulation circuit controls by power carrier the circuit that power supply changeover device corresponding to load fault cuts off this load;
(4), voltage sampling circuit II and current sampling circuit collection know that the bearing power of output changes, Information Monitoring is passed to controller by voltage sampling circuit II and current sampling circuit, controller sends control strategy and control signal is transferred to self coupling step-up transformer, self coupling step-up transformer adjustment power output and idle content, guarantee accurate voltage stabilizing and the power quality of output voltage;
(5), voltage sampling circuit I detects the three-phase input voltage of AC power, if there is AC power phase shift or phase shortage, then voltage sampling circuit I gathers and the information of collection is issued controller, controller sends control strategy and control signal is transferred to variable capacitor array, variable capacitor array changing capacitance, guarantees that the secondary side that T connects transformer exports as stable voltage signal.
The method of remote power-feeding fault location, load is 4 loads in parallel, and each load is connected to the output of remote power-feeding power source generator by respective power supply changeover device.
Embodiment 4:
The method of remote power-feeding fault location of the present invention, by remote power-feeding power source generator, be applied in remote power-feeding, the method for its fault location comprises the steps:
(1), by AC power be connected to the input of remote power-feeding power source generator, the output of remote power-feeding power source generator is connected to load by power supply changeover device;
(2), AC power is connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output by input, lightning protection device, isolating transformer, T, then is exported to load supplying by power supply changeover device;
(3), power line carrier, PLC is passed through between power carrier modulation-demodulation circuit and power supply changeover device, the operating state of power carrier modulation-demodulation circuit real-time collecting power supply changeover device, signal is communicated with Failure Detection Controller by bus, is judged by the line fault of Failure Detection Controller to load;
When Failure Detection Controller confirms the line fault that load occurs, localizing faults load, control strategy is issued power carrier modulation-demodulation circuit by bus by Failure Detection Controller, and power carrier modulation-demodulation circuit controls by power carrier the circuit that power supply changeover device corresponding to load fault cuts off this load;
(4), voltage sampling circuit II and current sampling circuit collection know that the bearing power of output changes, Information Monitoring is passed to controller by voltage sampling circuit II and current sampling circuit, controller sends control strategy and control signal is transferred to self coupling step-up transformer, self coupling step-up transformer adjustment power output and idle content, guarantee accurate voltage stabilizing and the power quality of output voltage;
(5), voltage sampling circuit I detects the three-phase input voltage of AC power, if there is AC power phase shift or phase shortage, then voltage sampling circuit I gathers and the information of collection is issued controller, controller sends control strategy and control signal is transferred to variable capacitor array, variable capacitor array changing capacitance, guarantees that the secondary side that T connects transformer exports as stable voltage signal.
The method of remote power-feeding fault location, load is 10 loads in parallel, and each load is connected to the output of remote power-feeding power source generator by respective power supply changeover device.
The method of remote power-feeding fault location, in step (3), the line fault of load comprises short trouble or open circuit fault.
The method of remote power-feeding fault location, AC power is that 380VAC three-phase voltage is inputted by input; The thunderbolt interference under secondary degree of protection reply open-air conditions is adopted by lightning protection device; By isolating transformer and external electrical network electrical isolation; T connects transformer and 380V three-phase alternating voltage is become 220V single-phase AC voltage; Fixed capacitor has compensate function, filtering high frequency spurs; Self coupling step-up transformer carries out boosting to input voltage by different no-load voltage ratio according to loading condition and regulates; EMI filtering lightning protection device carries out EMI filtering and lightning protection function to output; Output exports the single-phase AC voltage of 800 ~ 1600VAC; The AC constant voltage source that the single-phase AC voltage of 800 ~ 1600VAC is converted to 220V is powered to load by power supply changeover device.
By embodiment above, described those skilled in the art can be easy to realize the present invention.But should be appreciated that the present invention is not limited to above-mentioned embodiment.On the basis of disclosed execution mode, described those skilled in the art can the different technical characteristic of combination in any, thus realizes different technical schemes.
Except the technical characteristic described in specification, be the known technology of those skilled in the art.
Claims (10)
1. remote power-feeding power source generator, is characterized in that comprising input, output, lightning protection device, isolating transformer, T connects transformer, variable capacitor array, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, sample circuit, controller, power carrier modulation-demodulation circuit, Failure Detection Controller; Sample circuit comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Input, lightning protection device, isolating transformer, T connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output are connected successively; Variable capacitor array in parallel connects the secondary side of transformer in T; Controller controls variable capacitor array and self coupling step-up transformer by control signal; Voltage sampling circuit I is connected to the secondary side of isolating transformer and T connects between the primary side of transformer, and voltage sampling circuit I connection control device; The equal connection control device in one end of voltage sampling circuit II and current sampling circuit, the other end is connected to output; Failure Detection Controller to be communicated with power carrier modulation-demodulation circuit by bus and controls; Power carrier modulation-demodulation circuit one end connects Failure Detection Controller, and the other end is connected to output.
2. remote power-feeding power source generator according to claim 1, it is characterized in that AC power is connected to the input of remote power-feeding power source generator, the output of remote power-feeding power source generator is connected to load by power supply changeover device;
Lightning protection device: for tackling the thunderbolt interference under open-air conditions;
Isolating transformer: for making remote power-feeding power source generator and external electrical network electrical isolation;
T connects transformer: for the three-phase alternating voltage of input is become single-phase AC voltage;
Variable capacitor array: for changing capacitance size, when the three-phase alternating current generation phase shift inputted or phase shortage, adjustment exports phase place;
Fixed capacitor: for filtering high frequency spurs;
Self coupling step-up transformer: regulate for carrying out boosting according to loading condition to input voltage;
EMI filtering lightning protection device: for carrying out EMI filtering and lightning protection function to output;
Sample circuit: for sampling to input and output voltage or electric current, complete FEEDBACK CONTROL, comprises voltage sampling circuit I, voltage sampling circuit II and current sampling circuit;
Controller: the sampled value according to sample circuit controls variable capacitor array and self coupling step-up transformer;
Power carrier modulation-demodulation circuit: for being communicated with remote power-feeding power source generator by power line carrier;
Failure Detection Controller: the failure condition according to power carrier modulation-demodulation circuit feedback controls remote power-feeding power source generator, disengagement failure circuit.
3. remote power-feeding power source generator according to claim 1, is characterized in that self coupling step-up transformer is single-phase self-coupling step-up transformer.
4. remote power-feeding power source generator according to claim 1, is characterized in that controller is MCU or DSP.
5. remote power-feeding power source generator according to claim 1, it is characterized in that variable capacitor array comprises the multiple different array capacitor be connected in parallel, each array is equipped with a controllable silicon, this controllable silicon is controlled by the control signal of described controller, and controllable silicon is for being incorporated to or disconnecting the capacitor array at place.
6. remote power-feeding power source generator according to claim 3, it is characterized in that self coupling step-up transformer comprises the input and output with multiple tap, each tap is equipped with a controllable silicon, this controllable silicon is controlled by the control signal of described controller, access for input voltage adjusts, and controllable silicon is used for opening or disconnect place tap.
7. the method for remote power-feeding fault location, is characterized in that be applied in remote power-feeding, the method for its fault location comprises the steps: by any one remote power-feeding power source generator in claim 1-6
(1), by AC power be connected to the input of remote power-feeding power source generator, the output of remote power-feeding power source generator is connected to load by power supply changeover device;
(2), AC power is connect transformer, fixed capacitor, self coupling step-up transformer, EMI filtering lightning protection device, output by input, lightning protection device, isolating transformer, T, then is exported to load supplying by power supply changeover device;
(3), power line carrier, PLC is passed through between power carrier modulation-demodulation circuit and power supply changeover device, the operating state of power carrier modulation-demodulation circuit real-time collecting power supply changeover device, signal is communicated with Failure Detection Controller by bus, is judged by the line fault of Failure Detection Controller to load;
When Failure Detection Controller confirms the line fault that load occurs, localizing faults load, control strategy is issued power carrier modulation-demodulation circuit by bus by Failure Detection Controller, and power carrier modulation-demodulation circuit controls by power carrier the circuit that power supply changeover device corresponding to load fault cuts off this load;
(4), voltage sampling circuit II and current sampling circuit collection know that the bearing power of output changes, Information Monitoring is passed to controller by voltage sampling circuit II and current sampling circuit, controller sends control strategy and control signal is transferred to self coupling step-up transformer, self coupling step-up transformer adjustment power output and idle content, guarantee accurate voltage stabilizing and the power quality of output voltage;
(5), voltage sampling circuit I detects the three-phase input voltage of AC power, if there is AC power phase shift or phase shortage, then voltage sampling circuit I gathers and the information of collection is issued controller, controller sends control strategy and control signal is transferred to variable capacitor array, variable capacitor array changing capacitance, guarantees that the secondary side that T connects transformer exports as stable voltage signal.
8. the method for remote power-feeding fault location according to claim 7, it is characterized in that load is the load of multiple parallel connection, each load is connected to the output of remote power-feeding power source generator by respective power supply changeover device.
9. the method for remote power-feeding fault location according to claim 7, is characterized in that, in step (3), the line fault of load comprises short trouble or open circuit fault.
10. the method for remote power-feeding fault location according to claim 7, is characterized in that AC power is that 380VAC three-phase voltage is inputted by input; The thunderbolt interference under secondary degree of protection reply open-air conditions is adopted by lightning protection device; By isolating transformer and external electrical network electrical isolation; T connects transformer and 380V three-phase alternating voltage is become 220V single-phase AC voltage; Fixed capacitor has compensate function, filtering high frequency spurs; Self coupling step-up transformer carries out boosting according to loading condition to input voltage and regulates; EMI filtering lightning protection device carries out EMI filtering and lightning protection function to output; Output exports the single-phase AC voltage of 800 ~ 1600VAC; The AC constant voltage source that the single-phase AC voltage of 800 ~ 1600VAC is converted to 220V is powered to load by power supply changeover device.
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| CN201510228536.3A CN104795818B (en) | 2015-05-07 | 2015-05-07 | The method of remote power-feeding power source generator and remote power-feeding fault location |
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| CN107465183A (en) * | 2016-06-04 | 2017-12-12 | 黄禹舜 | A kind of far-end power supply system of modularization hot swap type |
| CN107742887A (en) * | 2017-11-22 | 2018-02-27 | 漳州科华技术有限责任公司 | A kind of remote power system |
| CN108448584A (en) * | 2018-03-01 | 2018-08-24 | 国网山东省电力公司潍坊供电公司 | Medial ＆ Low Voltage Power Network remote conveying electric system |
| CN114094581A (en) * | 2022-01-19 | 2022-02-25 | 深圳市暗能量电源有限公司 | Power supply system based on power line carrier communication and communication method thereof |
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| CN104795818B (en) | 2017-10-20 |
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