CN110739677A - constant-current power supply optical network power taking system and power taking method - Google Patents
constant-current power supply optical network power taking system and power taking method Download PDFInfo
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- CN110739677A CN110739677A CN201911192829.5A CN201911192829A CN110739677A CN 110739677 A CN110739677 A CN 110739677A CN 201911192829 A CN201911192829 A CN 201911192829A CN 110739677 A CN110739677 A CN 110739677A
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/04—Constant-current supply systems
Abstract
The invention discloses constant current supply optical network power taking systems and power taking methods, wherein at least 1 constant current power taking device is arranged between a near-end constant current supply device and a far-end constant current supply device, the input ends of the constant current power taking devices are connected in series, the output ends of the constant current power taking devices are connected in parallel, each constant current power taking device is provided with 1 control module and at least 2 constant voltage conversion modules, the input ends of the constant current conversion modules are connected in series, and the output ends of the constant current conversion modules are connected in parallel, the control module calculates the real-time output total power of the constant current power taking devices according to the real-time output power of each constant voltage conversion module, so that the power consumption requirements of the power devices are judged, the working state of each constant voltage conversion module is dynamically controlled in real time, the purpose of adaptively adjusting the rated operation total power of.
Description
Technical Field
The invention relates to the field of long-distance power supply of optical network transmission, in particular to constant-current power supply optical network power supply systems and power supply methods.
Background
The constant current power supply optical network has wide application prospect in underwater information systems and land unmanned area information systems such as a long-distance optical fiber transmission network, an optical fiber sensing network, an optical fiber observation network and the like.
The constant current power supply equipment is used for converting a local power supply, such as a 220V power supply or a 380V power supply, into a constant current power supply with a constant current value of , the output current of the constant current power supply is constant, but the power supply voltage changes adaptively along with the change of a load, the constant current power supply equipment is used as a load of the constant current power supply equipment and is used for converting the constant current power supply with the constant current value of into a constant voltage power supply with a constant voltage value of , and the constant voltage power supply with constant voltage is output to the outside to supply power for various electric equipment such as parameter sensors, observation equipment, mobile robot charging and the like.
The existing constant current power taking technology is generally to obtain output voltage by voltage stabilization and then coupling, and then obtain the output voltage through voltage conversion, and has the defects that under a voltage stabilization mode, the sum of external output power and self heat power consumption of constant current power taking equipment is fixed, namely the rated operation total power of the constant current power taking equipment is constant, when the external output power of the constant current power taking equipment is reduced, the self heat power consumption is synchronously increased, when the external actual output power of the constant current power taking equipment is increased, the self heat power consumption is synchronously reduced, in other words, when the constant current power taking equipment supplies power to external small power, most energy is consumed as heat power consumption, so that the power supply conversion efficiency is low, and energy waste is large, when a plurality of constant current power taking equipment are used in series, the power consumption requirement is large, the fixed rated operation total power limits the power supply capacity of the constant current power supply equipment and the power conversion efficiency of the constant current power taking equipment, and flexible and variable power consumption requirements cannot be met.
Disclosure of Invention
The invention provides constant-current power supply optical network power taking systems and methods, which solve the problems of low power conversion rate and incapability of adaptively adjusting rated operation total power along with the power demand of power utilization equipment in the prior art.
The invention solves the technical problem by the following technical scheme:
the constant-current power supply optical network power supply system comprises at least 1 constant-current power supply device, wherein the input ends of the constant-current power supply devices are connected in series, each constant-current power supply device independently supplies power to external power utilization devices, or the input ends of 2 or more than 2 constant-current power supply devices are connected in series, the output ends of the 2 or more than 2 constant-current power supply devices are connected in parallel, and the constant-current power supply system supplies power to external power utilization devices, each constant-current power supply device comprises a control module and at least 2 constant-voltage conversion modules, the control module receives a constant-current source of a constant-voltage conversion module at the tail end of an external near-end constant-current power supply device or an upper constant-current power supply device, the control module sends a control signal to each constant-voltage conversion module to control the working state of each constant-voltage conversion module, the input ends of the constant-voltage conversion modules are connected in series, the output ends of the constant-voltage conversion modules are connected in parallel, and then supply power to the external power utilization devices, or the output ends of 2 or more than 2 constant-current power supply devices are connected in parallel and.
, each constant voltage conversion module has the same structure, each constant voltage conversion module comprises a management circuit, a constant voltage conversion end low voltage side circuit, a constant current adapter circuit, a voltage conversion circuit and a monitoring circuit, wherein the constant voltage conversion end low voltage side circuit receives the constant current power supply of the control module or the upper constant voltage conversion modules, the coupling energy supplies power to the management circuit after low voltage conversion, the constant voltage conversion end low voltage side circuit also directly connects the constant current power supply of the control module or the upper constant voltage conversion modules to the constant current adapter circuit, the constant current adapter circuit transmits the received constant current power supply to the lower constant voltage conversion modules in the current constant current power supply equipment, or the control module in the lower constant current power supply equipment or the remote constant current power supply equipment, the constant current adapter circuit also receives the control signal of the management circuit, the control signal is provided by the control module, the constant current adapter circuit performs energy coupling and voltage stabilization processing under the control signal, obtains the constant voltage power supply, inputs the constant voltage power supply to the voltage conversion circuit, supplies power to the external power equipment, the external power supply, the control circuit outputs the actual voltage and outputs the current value, the actual voltage monitoring voltage and outputs the actual voltage control value, the actual voltage output the current value, and the actual voltage monitoring voltage control voltage.
, in each constant voltage conversion module, the constant voltage conversion end low voltage side circuit comprises a constant voltage conversion end constant current through sub-circuit, a constant voltage conversion end coupling voltage stabilization sub-circuit and a constant voltage conversion end low voltage conversion sub-circuit, wherein the constant voltage conversion end constant current through sub-circuit receives the constant current power supply of the control module or the upper constant voltage conversion modules, the constant current power supply is directly connected to the constant current adapter circuit, meanwhile, the energy source is coupled to the constant voltage conversion end coupling voltage stabilization sub-circuit for voltage stabilization control, and then the low voltage conversion is realized through the constant voltage conversion end low voltage conversion sub-circuit to supply power for the management circuit.
, in each constant voltage conversion module, the constant current adapter circuit mainly includes a controllable constant current sub-circuit, a series coupling sub-circuit, and a constant voltage stabilizing sub-circuit, the management circuit sends a control signal to the controllable constant current sub-circuit, the controllable constant current sub-circuit receives the constant current power output by the low voltage side circuit at the constant voltage conversion end, and under the control of the control signal, the constant current power is directly connected to the next constant voltage conversion modules in the current constant current power-taking device, or the control modules in the next constant current power-taking device, or the remote constant current power-supplying device, at this time, the controllable constant current sub-circuit outputs the uncoupled energy to the series coupling sub-circuit, the constant voltage conversion modules do not supply power to the current constant current power-taking device, or, under the control of the control signal, the constant current power is connected to the next constant voltage conversion modules in the current power-taking device, or the control modules in the next constant current power-taking device, or the remote power-supplying device, and under the control signal, the energy is output to the series coupling sub-circuit to perform the constant voltage stabilizing and then the constant voltage conversion.
, in each constant voltage conversion module, the voltage conversion circuit includes a low pass filter sub-circuit, a voltage conversion sub-circuit and a voltage stabilization filter sub-circuit, the low pass filter sub-circuit performs low pass filtering on the signal output by the constant current adapter circuit, the voltage conversion sub-circuit performs voltage conversion on the signal output by the low pass filter sub-circuit under the control of the management circuit, the voltage stabilization filter sub-circuit performs voltage stabilization filtering on the output signal of the voltage conversion sub-circuit and then supplies power to external electric equipment, and the monitoring circuit monitors the actual output voltage value of the voltage conversion sub-circuit and the actual output current value of the voltage stabilization filter sub-circuit.
, in each constant voltage conversion module, the monitoring circuit mainly comprises a current value monitoring sub-circuit and a voltage value monitoring sub-circuit, the voltage value monitoring sub-circuit monitors the actual output voltage value of the voltage conversion circuit and inputs the actual output voltage value to the management circuit, and the current value monitoring sub-circuit monitors the actual output current value of the voltage conversion circuit and inputs the actual output current value to the management circuit.
, in each constant current power taking device, each control module comprises a control end low-voltage side circuit, a CPU and a memory, the control module receives constant current sources of the external near-end constant current power supply device or the last constant voltage conversion module of the constant current power taking devices, the control end low-voltage side circuit is coupled with energy sources to supply power to the memory and the CPU, the control end low-voltage side circuit also enables the constant current sources of the external near-end constant current power supply device or the last constant voltage conversion module of the constant current power taking devices to be directly connected to the lower constant voltage conversion modules, the CPU receives monitoring values of the constant voltage conversion modules, sends control instructions to the constant voltage conversion modules according to the monitoring values, adjusts the working states of the constant voltage conversion modules, and the memory stores the monitoring values.
, in each control module, the control end low-voltage side circuit comprises a control end constant-current through sub-circuit, a control end coupling voltage-stabilizing sub-circuit and a control end low-voltage conversion sub-circuit, wherein the control end constant-current through sub-circuit receives a constant-current source, and leads the constant-current source to the next constant-voltage conversion modules, and meanwhile, the coupling energy is output to the control end coupling voltage-stabilizing sub-circuit to perform voltage stabilization control, and then is sent to the control end low-voltage conversion sub-circuit to perform voltage conversion to supply power for the CPU and the memory.
The power taking method based on the constant-current power supply optical network power taking systems comprises the following steps:
(1) in the current constant-current power taking equipment, a control module calculates the real-time output power of a constant-voltage conversion module according to the actual output voltage value and the actual output current value of the constant-voltage conversion module to obtain the real-time output total power of the constant-current power taking equipment so as to determine the power consumption requirement of external power consumption equipment and control a corresponding number of constant-voltage conversion modules to be in an operating state; the actual output voltage value of the constant voltage conversion module in each operation state is in a preset range, or the difference obtained by subtracting the sum of the rated output power values of the constant voltage conversion modules in all operation states from the sum of the actual output power values of the constant voltage conversion modules in all operation states is in the preset range;
(2) when the power consumption requirement of the external power consumption equipment is changed, the control module re-sends a control signal to the constant voltage conversion module according to the newly monitored actual output voltage value and actual output current value, and increases or decreases the number of the constant voltage conversion modules in the running state;
(3) when a constant voltage conversion module breaks down, the control module sends a control instruction to the constant voltage conversion module to enable the constant voltage conversion module to be in a standby state, and sends control instructions to constant voltage conversion modules in other standby states to start a new constant voltage conversion module to be in an operating state.
, in step (1), the actual output voltage value of the constant voltage conversion module in each operation state is greater than 90% of the rated output voltage value of the single constant voltage conversion module, or the difference obtained by subtracting the sum of the rated output power values of the constant voltage conversion modules in all operation states from the sum of the actual output power values of the constant voltage conversion modules in all operation states is less than 10% of the rated output power value of the single constant voltage conversion module.
Compared with the prior art, the method has the following characteristics:
1. the method comprises the steps that at least 1 constant current power taking device is arranged between a near-end constant current power supply device and a far-end constant current power supply device, all the constant current power taking devices are connected in series, 1 control module and at least 2 constant voltage conversion modules with input ends connected in series and output ends connected in parallel are arranged in each constant current power taking device, the control module can calculate real-time output power of all the constant voltage conversion modules according to the actual output voltage value and the actual output current value of the constant voltage conversion modules in each operation state monitored on line to obtain the real-time output total power of the constant current power taking devices, the power consumption of the power utilization devices is judged according to the real-time output total power, the working state of all the constant voltage conversion modules is dynamically adjusted, the constant voltage conversion modules are prevented from being in an overload working state or a low-load working state, all the constant voltage conversion modules are prevented from being in an operation state when the constant current power taking devices supply power to the outside, the total power consumption of the constant current power taking devices is reduced, the power conversion efficiency of the power supply devices is improved, and meanwhile, the purpose that the external output voltage is constant;
2. each constant voltage conversion module is provided with a management circuit, a low voltage side circuit at a constant voltage conversion end, a constant current adapter circuit, a voltage conversion circuit and a monitoring circuit, the management circuit controls the working state of the current constant voltage conversion module according to the instruction of the control module, the monitoring circuit monitors the voltage value and the current value output by the current constant voltage conversion module and feeds the voltage value and the current value back to the control module, other circuits complete the constant voltage conversion function, the control module can acquire the actual output voltage value and the actual output current value of each constant voltage conversion module in real time, the real-time output power of the constant voltage conversion module is calculated according to the actual output voltage value and the actual output current value of each constant voltage conversion module, whether each constant voltage conversion module is in an overload working state or a low load working state is judged, the power demand of electric equipment is sensed through the working load of the constant voltage conversion module, and the working state of, the constant-voltage conversion modules are controlled to be in an operating state or a standby state, the purpose of adaptively adjusting the rated operating total power of the constant-current power taking equipment is achieved, the power supply conversion efficiency of the constant-current power taking equipment is practically improved, and the heat power consumption is reduced;
3. the input ends of the constant voltage conversion modules in the constant current power taking equipment are connected in series, the constant voltage conversion modules in different working states are not influenced mutually, when a certain constant voltage conversion module breaks down, the series connection of the input ends cannot be influenced, and the control module can automatically start the certain constant voltage conversion module in a standby state to replace the broken constant voltage conversion module, so that the normal operation of the constant current power taking equipment is ensured, and the reliability of the equipment is improved.
Drawings
Fig. 1 is a schematic block diagram of the structure of the present invention.
Fig. 2 is a schematic block diagram of the structure of the constant voltage conversion module.
Fig. 3 is a schematic block diagram of the structure of the low-voltage bypass circuit of the constant-voltage converting terminal.
Fig. 4 is a structural schematic block diagram of the constant current adaptation circuit.
Fig. 5 is a schematic block diagram of the structure of the voltage conversion circuit.
Fig. 6 is a schematic block diagram of the structure of the monitoring circuit.
Fig. 7 is a schematic block diagram of the structure of the management circuit.
Fig. 8 is a schematic block diagram of the structure of the control module.
Fig. 9 is a structural schematic block diagram of a control terminal low-voltage bypass circuit.
Detailed Description
The present invention is further illustrated at in the following examples, which are not intended to limit the invention.
constant current power supply optical network power supply system, as shown in fig. 1, includes at least 1 constant current power supply device, the input end of each constant current power supply device is connected in series, each constant current power supply device individually supplies power for its own external power consumption device, when the external output power of a single constant current power supply device can not meet the power consumption requirement, the input end of 2 or more than 2 constant current power supply devices can be connected in series, the output end can be connected in parallel, to supply power for the same external power consumption devices.
The control module is connected with an external near-end constant current power supply device or a constant voltage conversion module at the tail end of the upper constant current power supply devices, receives a constant current source of the constant voltage conversion module at the tail end of the upper constant current power supply devices, is connected with the control end of each constant voltage conversion module, sends a control signal to each constant voltage conversion module, controls the working state of each constant voltage conversion module, such as the running state or the standby state, is connected in series with the input end of each constant voltage conversion module, supplies power to external electric equipment after the output ends of each constant voltage conversion module are connected in parallel, or supplies power to the same external electric equipment after the output ends of 2 or more constant current power supply devices are connected in parallel, and is connected with the control module of the lower constant current power supply devices or external far-end power supply devices.
In fig. 1, M (M is greater than or equal to 1) constant current power taking devices are provided, which are the th constant current power taking device, the second constant current power taking device and the mth constant current power taking device, input ends of the constant current power taking devices are connected in series, and output ends of the constant current power taking devices directly supply power to respective power utilization devices, or when external output power of a single constant current power taking device cannot meet requirements, the power supply to the same external power utilization devices can be realized by connecting output ends of 2 or more than 2 constant current power taking device input ends in series and connecting the output ends in parallel.
The constant-voltage conversion circuit comprises a management circuit, a constant-voltage conversion end low-voltage side circuit, a constant-current adapter circuit, a voltage conversion circuit and a monitoring circuit, wherein the management circuit is connected with a control circuit, the input end of the constant-voltage conversion end low-voltage side circuit is connected with the control circuit or upper constant-voltage conversion modules in the current constant-current power supply device, the output end of a circuit of the constant-voltage conversion end low-voltage side circuit is connected with the power supply end of the management circuit, the output end of another circuit of the constant-voltage conversion end low-voltage side circuit is connected to the control module of lower or lower constant-current power supply devices or an external remote constant-current power supply device through a constant-current adapter circuit, the constant-voltage conversion end low-voltage side circuit receives the constant-current power supply of upper constant-voltage conversion modules in the control module or the current constant-current power supply device, a coupling part of energy supplies power to the management circuit after low-voltage conversion, the constant-current adapter circuit directly passes through the constant-current conversion circuit or upper constant-voltage conversion modules in the current constant-voltage conversion circuit, the constant-current conversion circuit is connected with the constant-voltage conversion circuit, the constant-voltage conversion circuit receives the constant-voltage signal from the constant-voltage conversion circuit, the constant-voltage conversion circuit is connected with the constant-voltage conversion circuit, the constant-voltage conversion circuit is connected constant-voltage conversion circuit, the constant-voltage conversion circuit is connected with the constant-voltage conversion circuit, the constant-voltage conversion circuit is connected with.
As can be seen from FIG. 1, each constant current power taking device is provided with N (N is more than or equal to 2) constant voltage conversion modules which are respectively a constant voltage conversion module, a second constant voltage conversion module and an Nth constant voltage conversion module, the structures and the performances of the constant voltage conversion modules are the same, and each constant voltage conversion module is controlled by the control module of the constant current power taking device in which the constant voltage conversion module is located.
The invention is also provided with a case, and the control module and each constant voltage conversion module are arranged in the case. At least 2 slots are arranged in the case, the number of the slots is larger than or equal to that of the constant voltage conversion modules, each constant voltage conversion module is electrically connected with the control module through the slot, and the output ends of the constant voltage conversion modules are connected in parallel through the slots.
The slots are provided with contact pins, the constant voltage conversion modules are electrically connected with the control module through the contact pins, and the output ends of the constant voltage conversion modules are electrically connected through the slots; the constant voltage conversion module is provided with a detection end, when the constant voltage conversion module is plugged in or pulled out, the constant voltage conversion module moves in position in the plugging or pulling-out process to cause the connection or disconnection of a contact pin of the constant voltage conversion module, the level of the contact pin changes, the detection end of the constant voltage conversion module detects the level change of the contact pin, and a management circuit of the constant voltage conversion module feeds the level change back to the control module to be used as a basis for controlling the increase and decrease of the number of the constant voltage conversion modules.
The maximum rated total power of the constant current power taking equipment is changed by increasing or decreasing the number of the constant voltage conversion modules, so that the purpose of capacity expansion of the constant current power taking equipment is achieved, the purpose of arbitrary capacity expansion is achieved without developing new equipment, and the application range of the equipment is widened. The control module sends control signals to the constant voltage conversion modules, so that the constant voltage conversion modules are respectively in an operating state or a standby state, the constant voltage conversion modules in the operating state externally output voltage and current, the constant voltage conversion modules in the standby state do not generate heat power consumption, and the rated operation total power of the constant current power taking equipment is changed by controlling the number of the constant voltage conversion modules in the operating state. The control module calculates real-time output power of the constant voltage conversion module according to the actual output voltage value and current value of each constant voltage conversion module in the running state, judges whether each constant voltage conversion module is in the overload working state or the low-load working state, senses the power consumption requirement of the electric equipment through the working load of the constant voltage conversion module, controls a corresponding number of constant voltage conversion modules in the running state according to the power consumption requirement, dynamically controls the working state of each constant voltage conversion module in real time, enables the constant current power taking equipment to work in the non-maximum rated total power state, achieves the purpose of adaptively adjusting the rated running total power of the constant current power taking equipment, practically improves the power supply conversion efficiency of the constant current power taking equipment, and reduces heat consumption.
In each constant voltage conversion module, the constant voltage conversion end low voltage side circuit comprises a constant voltage conversion end constant current direct current sub-circuit, a constant voltage conversion end coupling voltage stabilization sub-circuit and a constant voltage conversion end low voltage conversion sub-circuit, wherein the input end of the constant voltage conversion end constant current direct current sub-circuit is connected with the control module or the upper constant voltage conversion modules in the current constant current power supply equipment, the output end of constant voltage conversion end constant current direct current sub-circuit is connected with the constant current adapter circuit, the output end of the other constant voltage conversion end constant current direct current sub-circuit is connected with the input end of the constant voltage conversion end coupling voltage stabilization sub-circuit, the output end of the constant voltage conversion end coupling voltage stabilization sub-circuit is connected with the input end of the constant voltage conversion end low voltage conversion sub-circuit, the output end of the constant voltage conversion end low voltage conversion sub-circuit is connected with the management circuit, and the structural principle block diagram of the constant voltage conversion.
The constant-voltage conversion end constant-current direct-current sub-circuit receives the constant-current power supplies of the control modules or the upper constant-voltage conversion modules, and directly transmits the constant-current power supplies to the constant-current adapter circuit, meanwhile, part of energy is coupled out to the constant-voltage conversion end coupling voltage stabilization sub-circuit for voltage stabilization control, low-voltage conversion is realized through the constant-voltage conversion end low-voltage conversion sub-circuit, and power is supplied to the management circuit.
In each constant-current conversion module, the constant-current adapter circuit mainly comprises a controllable constant-current sub circuit, a series coupling sub circuit and a constant-voltage stabilizing sub circuit, the management circuit is connected with the control end of the controllable constant-current sub circuit, the input end of the controllable constant-current sub circuit is connected with a low-voltage side circuit of the constant-voltage conversion end, the output end of circuits of the controllable constant-current sub circuit is connected with the lower constant-voltage conversion modules in the current constant-current power-taking equipment or the control modules in the lower constant-current power-taking equipment or external remote constant-current power supply equipment, the output end of the other circuits of the controllable constant-current sub circuit is connected to the voltage conversion circuit through the series coupling sub circuit and the constant-voltage stabilizing sub circuit, the constant-current adapter circuit further comprises a constant-current adapter management interface sub circuit, the management circuit is connected to the control end of the controllable constant-current sub circuit through the constant-current adapter management interface sub circuit, and the structural principle block diagram.
In each constant voltage conversion module, the management circuit sends a control signal to the controllable constant current sub-circuit, the controllable constant current sub-circuit receives the constant current power output by the low-voltage side circuit at the constant voltage conversion end, the constant current power is directly connected to the lower constant voltage conversion modules in the current constant current power taking equipment or the control modules in the lower constant current power taking equipment or the remote constant current power supply equipment under the control of the control signal, at the moment, the controllable constant current sub-circuit is not coupled with the energy output to the series coupling sub-circuit, the constant voltage conversion modules do not supply power to the electric equipment, the constant voltage conversion modules are in a standby state, or the constant current power is directly connected to the lower constant voltage conversion modules in the current constant current power taking equipment or the control modules in the lower constant current power taking equipment or the remote constant current power supply equipment under the control signal, meanwhile, the controllable constant current sub-circuit couples part of the energy output to the series coupling sub-circuit to perform voltage stabilization control, a direct current power supply is obtained, the direct current power is input to the voltage conversion sub-circuit after the constant voltage conversion sub-circuit is input to the constant voltage stabilization sub-circuit to perform constant voltage conversion, the constant voltage conversion modules are in a constant voltage conversion state, the constant voltage conversion circuit is in a constant voltage conversion state, the constant voltage conversion module is coupled to perform the constant voltage conversion, the constant voltage conversion module is in a constant voltage conversion state, the constant voltage conversion circuit, the constant voltage conversion module is connected in a series connection state, the constant voltage conversion circuit, the constant voltage conversion module is connected.
In each constant voltage conversion module, the voltage conversion circuit comprises a low-pass filtering sub-circuit, a voltage conversion sub-circuit and a voltage-stabilizing filtering sub-circuit; the input end of the low-pass filter sub-circuit is connected with the constant-current adapter circuit, and the output end of the low-pass filter sub-circuit is connected to external electric equipment through the voltage conversion sub-circuit and the voltage stabilization filter sub-circuit; the management circuit is connected with the control end of the voltage conversion sub-circuit; the test interface of the voltage conversion sub-circuit is connected with the monitoring circuit; and the test interface of the voltage-stabilizing filter sub-circuit is connected with the monitoring circuit. The voltage conversion circuit also comprises a voltage conversion end management interface sub-circuit, and the management circuit is connected with the control end of the voltage conversion sub-circuit through the voltage conversion end management interface sub-circuit. The schematic block diagram of the voltage conversion circuit is shown in fig. 5.
In the invention, a low-pass filtering sub-circuit receives a direct-current 55V power supply output by a constant-current adapter circuit to perform low-pass filtering, and outputs the power supply noise with the frequency of more than 30Hz to a voltage conversion sub-circuit, the voltage conversion sub-circuit performs voltage conversion on a signal output by the low-pass filtering sub-circuit under the control of a control signal issued by a management circuit, converts the direct-current 55V power supply into one of 1 or 2 direct-current voltages of 5V, 12V, 24V, 48V, 72V or 375V and the like, and outputs the one to a voltage-stabilizing filtering sub-circuit; the voltage stabilizing filter sub-circuit performs voltage stabilizing filtering on the received 1 or 2 kinds of direct current voltage, the voltage fluctuation is controlled within the range of +/-1%, power supply noise generated by voltage conversion with the frequency of more than 30Hz is filtered out at the same time, the direct current power supply after voltage stabilizing and filtering is output to electric equipment, and a test interface is provided for connecting a monitoring circuit; the monitoring circuit monitors the actual output voltage value of the voltage conversion sub-circuit and the actual output current value of the voltage stabilization filter sub-circuit; the voltage conversion end management interface sub-circuit outputs the control signal issued by the management circuit to the voltage conversion sub-circuit after interface conversion and adaptation for controlling voltage conversion.
In each constant voltage conversion module, the monitoring circuit mainly comprises a current value monitoring sub-circuit and a voltage value monitoring sub-circuit; the voltage value monitoring sub-circuit monitors the voltage value of the voltage conversion circuit and inputs the voltage value to the management circuit; the current value monitoring sub-circuit monitors a current value of the voltage conversion circuit and inputs the current value to the management circuit. The monitoring circuit further comprises a monitoring end management interface sub-circuit, the output end of the current value monitoring sub-circuit is connected to the management circuit through the monitoring end management interface sub-circuit, and the output end of the voltage value monitoring sub-circuit is connected to the management circuit through the monitoring end management interface sub-circuit. The schematic block diagram of the monitoring circuit is shown in fig. 6. The current value monitoring sub-circuit monitors the actual output current of the voltage conversion circuit in real time, the voltage value monitoring sub-circuit monitors the actual output voltage of the voltage conversion circuit in real time, and the monitoring value is input into the management circuit through the monitoring end management interface sub-circuit.
In each constant voltage conversion module, the management circuit comprises a central processing unit sub-circuit, a memory sub-circuit, a control interface sub-circuit, a monitoring interface sub-circuit, a management end management interface sub-circuit and a power supply interface sub-circuit; the power interface sub-circuit is connected with the output end of the conversion end low-voltage side circuit, receives various power supplies provided by the conversion end low-voltage side circuit, and provides working voltage for the central processing unit sub-circuit, the memory sub-circuit, the control interface sub-circuit, the monitoring interface sub-circuit and the management end management interface sub-circuit; the memory sub-circuit is connected with the central processing unit sub-circuit and stores monitoring data; the central processing unit sub-circuit is connected to the control module through the control interface sub-circuit, receives the control signal sent by the control module, and after the control signal forwarded by the central processing unit sub-circuit is subjected to interface adaptation through the management end management interface sub-circuit, the control signal is sent to the constant current adaptation circuit and the voltage conversion circuit and used for adjusting the working states of the constant current adaptation circuit and the voltage conversion circuit and controlling the output voltage of the constant voltage conversion module in the running state; the monitoring data of the monitoring circuit is input into the CPU sub-circuit through the monitoring interface sub-circuit and then fed back into the control module through the control interface sub-circuit. The schematic block diagram of the structure of the management circuit is shown in fig. 7.
In each constant current power-taking device, the control module comprises a control end low-voltage bypass circuit, a CPU and a memory, wherein the input end of the control end low-voltage bypass circuit is connected with an external near-end constant current power supply device or a constant voltage conversion module at the tail end of the upper constant current power-taking devices, the output end of the control end low-voltage bypass circuit is connected with the lower constant voltage conversion modules, the control end low-voltage bypass circuit provides a power supply for the memory and the CPU, the memory is connected with the CPU, the CPU is connected with each constant voltage conversion module, the constant current power-taking device further comprises a control interface, the control end low-voltage bypass circuit provides power for the control interface, and the CPU is connected with each constant voltage conversion module through the control interface.
The control module receives constant current sources of the tail constant voltage conversion modules of near-end constant current power supply equipment or upper constant current power-taking equipment, partial energy is coupled by a control-end low-voltage side circuit, the constant current sources are processed to supply power to the storage, the CPU and the control interface, meanwhile, the control-end low-voltage side circuit also enables the constant current sources of the tail constant voltage conversion modules of the near-end constant current power supply equipment or upper constant current power-taking equipment to be directly connected to the lower constant voltage conversion modules, the CPU receives actual output current values and actual output voltage values monitored by the constant voltage conversion modules through the control interface, the actual output power of the constant voltage conversion modules is calculated according to the monitored values, the real-time output total power of the constant current power-taking equipment is obtained, whether the constant voltage conversion modules are in an overload working state or low-load working state is judged according to the magnitude of the real-time output power, the power consumption requirements of the monitoring power equipment are sensed through the working loads of the constant voltage conversion modules, control instructions are sent to the constant voltage conversion modules, the working states of the constant voltage.
In each control module, the control end low-voltage side circuit comprises a control end constant-current through sub-circuit, a control end coupling voltage-stabilizing sub-circuit and a control end low-voltage conversion sub-circuit, wherein the input end of the control end constant-current through sub-circuit is connected with a near-end constant-current power supply device or the tail-end constant-voltage conversion module of the upper constant-current power supply devices, the output end of of the control end constant-current through sub-circuit is connected with the lower constant-voltage conversion modules, the output end of the other of the control end constant-current through sub-circuit is connected with the input end of the control end coupling voltage-stabilizing sub-circuit, the output end of the control end coupling voltage-stabilizing sub-circuit is connected with the input end of the control end low-voltage conversion sub-circuit, the output end of the control end low-voltage conversion sub-circuit is connected with a CPU, a control interface and a.
The control end constant-current direct-current sub-circuit receives a constant-current source of a near-end constant-current power supply device or a constant-current source of the tail-most constant-voltage conversion module of the upper constant-current power taking devices, and directly transmits the constant-current source to the lower constant-voltage conversion modules, meanwhile, part of coupled energy is output to the control end to be coupled with the voltage-stabilizing sub-current for voltage stabilization control, and then output voltage is sent to the control end low-voltage conversion sub-circuit for voltage conversion, so that power is supplied to a CPU, a memory and a control interface.
A power-taking method of a power-taking system of a constant-current power supply optical network is as follows:
(1) in the current constant current power taking equipment, a control module calculates the real-time output power of a constant voltage conversion module according to the actual output voltage value and the actual output current value of the constant voltage conversion module to obtain the real-time output total power of the constant current power taking equipment, judges whether each constant voltage conversion module is in an overload working state or a low-load working state, senses the power consumption requirement of the power equipment through the working load of each constant voltage conversion module, dynamically adjusts the working state of each constant voltage conversion module in real time, such as an operation state or a standby state, so that the constant current power taking equipment works in a non-maximum rated total power state, and achieves the purpose of adaptively adjusting the rated operation total power of the constant current power taking equipment; the actual output voltage value of the constant voltage conversion module in each operation state is in a preset range, or the difference obtained by subtracting the sum of the rated output power values of the constant voltage conversion modules in all operation states from the sum of the actual output power values of the constant voltage conversion modules in all operation states is in the preset range;
(2) when the power consumption requirement of the external power consumption equipment changes, the control module recalculates the real-time output power of the constant voltage conversion module according to the newly monitored actual output voltage value and actual output current value to obtain the real-time output total power of the constant current power taking equipment, and then sends a control signal to the constant voltage conversion module to increase or decrease the number of the constant voltage conversion modules in the running state;
(3) when a constant voltage conversion module breaks down, the control module sends a control instruction to the constant voltage conversion module to enable the constant voltage conversion module to be in a standby state, and sends control instructions to constant voltage conversion modules in other standby states to start a new constant voltage conversion module to be in an operating state.
In step (1), when the control module detects that the sum of the rated output power values of the constant voltage conversion modules in all operating states minus the sum of the actual output power values of the constant voltage conversion modules in all operating states is still greater than or equal to the rated power of a single constant voltage conversion module, the control module firstly closes 1 of the constant voltage conversion modules in the operating states and continues to monitor new actual output voltage values and new actual output current values, when the control module detects that the actual output voltage value of a certain constant voltage conversion modules is less than or equal to 90% of the rated output voltage value thereof, or the sum of the actual output power values of the constant voltage conversion modules in all operating states minus the sum of the rated output power values of the constant voltage conversion modules in all operating states and the obtained difference is greater than or equal to 10% of the rated output power value of the single constant voltage conversion module, the control module opens 1 new constant voltage conversion module in a standby state to enable the constant voltage conversion modules in the operating state to be in the operating state and continues to monitor new actual output voltage values and actual output current values until the actual output voltage values of the constant voltage conversion modules in each operating state are greater than 90% of the rated output power values of the single constant voltage conversion module or the sum of the rated output power values of the single constant voltage conversion module, and the difference of the.
In the step (2), when the power demand of the power consumption equipment is increased, the control module monitors that the output voltage value of a certain constant voltage conversion module is less than or equal to 90% of the rated voltage value, or the sum of the actual output power of all the constant voltage conversion modules in the running state is subtracted from the sum of the rated output power values of all the constant voltage conversion modules in the running state, and the obtained difference value is greater than or equal to 10% of the rated power value of a single constant voltage conversion module, the control module starts 1 new constant voltage conversion module in the standby state to enable the constant voltage conversion module to be in the running state, monitors the new actual output voltage value and the new actual output current value, increases the rated running total power of the constant current power consumption equipment by increasing the number of the constant voltage conversion modules in the running state, improves the external output power of the constant current power consumption equipment, and meets the power demand of the power, the dynamic random expansion of the constant current power-taking equipment is realized.
In the step (2), when the power demand of the power consumption equipment is reduced, the sum of the rated output power values of all the constant voltage conversion modules in the running state is subtracted from the sum of the actual output power values of all the constant voltage conversion modules in the running state, and when the obtained difference value is greater than or equal to the rated output power value of a single constant voltage conversion module, the control module closes one constant voltage conversion module 1 in the running state to enable the constant voltage conversion module to be in a standby state, the rated running total power of the constant current power taking equipment is reduced by reducing the number of the constant voltage conversion modules in the running state, and the heat power consumption of the constant current power taking equipment is reduced. The rated operation total power of the constant-current power taking equipment is increased or decreased by increasing or decreasing the number of the constant-voltage conversion modules in the operation state, so that the power consumption requirement of the power equipment is met, the power conversion efficiency of the constant-current power taking equipment is improved when the power supply is externally output in a wide power range, and the heat power consumption of the equipment is reduced.
In the step (3), the operation states of the constant voltage conversion modules are independent from each other, and can be in operation work or standby state respectively, so that mutual interference is avoided, the control module can control the operation state of each constant voltage conversion module, adjust the failed constant voltage conversion module to the standby state, adjust the constant voltage conversion module normally in the standby state to the operation state, replace the failed constant voltage conversion module, realize automatic protection switching, online maintenance and replacement of the constant voltage conversion module, improve the reliability of the constant current power-taking equipment, and ensure the normal operation of the power-taking system.
According to the (2) and (3), no matter the power consumption requirement changes or the constant voltage conversion module breaks down, the control module can automatically control the number of the constant voltage conversion modules in the running state, the working state of the constant voltage conversion module is changed in a self-adaptive manner, the rated running total power and the external output power of the constant current power taking equipment are dynamically adjusted, and the rated running total power is increased and decreased synchronously along with the external output power, so that the power supply conversion efficiency of the constant current power taking equipment is improved, and the heat power consumption is reduced.
The constant current power taking equipment can be self-adaptive to the constant current power supply equipment with the output current range of 0.3-5.0A and the output voltage range of-20 Kv to 20Kv, the output power of a single constant voltage conversion module can reach more than 50W, the rated output power of the constant current power taking equipment consisting of a plurality of constant voltage conversion modules can reach more than 4000W, the rated operation total power and the rated external output power can be flexibly and automatically set between 50W and 4000W according to the power consumption requirement of the power equipment, and the power conversion efficiency of the constant current power taking equipment with the power of 50W to 4000W is improved. The full-range power conversion efficiency is more than or equal to 90% when the external output power is 50-4000W, the output direct-current voltage of the constant-current power taking equipment can be configured into direct-current voltages of 5V, 12V, 24V, 48V, 72V, 375V and the like, and the maximum rated output power can reach more than 4000W.
Claims (10)
1, kinds of constant current supply optical network get electric system, its characterized in that:
the power supply system comprises at least 1 constant current power-taking device, wherein the input ends of the constant current power-taking devices are connected in series, and each constant current power-taking device independently supplies power to external power utilization equipment, or the input ends of 2 or more than 2 constant current power-taking devices are connected in series, and the output ends of the constant current power-taking devices are connected in parallel and supply power to external power utilization equipment;
the control module receives a constant current source of an external near-end constant current power supply device or a constant current source of a last constant current conversion module at the tail end of the upper constant current power supply devices, the control module sends control signals to each constant voltage conversion module to control the working state of each constant voltage conversion module, the input ends of each constant voltage conversion module are connected in series, the output ends of each constant voltage conversion module are connected in parallel to supply power to external power utilization devices, or the output ends of 2 or more than 2 constant current power utilization devices are connected in parallel to supply power to the external power utilization devices, and the constant voltage conversion module at the tail end of the current constant current power utilization device is connected with the control modules of the lower constant current power utilization devices or external far-end constant current power supply devices.
2. The kinds of constant current supply optical network power-taking system of claim 1, wherein:
the structures of all constant voltage conversion modules are the same;
each constant voltage conversion module comprises a management circuit, a low voltage side circuit of a constant voltage conversion end, a constant current adapter circuit, a voltage conversion circuit and a monitoring circuit;
the constant-voltage conversion end low-voltage side circuit receives a control module or constant-current power supplies of constant-voltage conversion modules, a coupling energy source supplies power to a management circuit after low-voltage conversion, the constant-voltage conversion end low-voltage side circuit also directly leads the constant-current power supplies from the control module or the upper constant-voltage conversion modules to a constant-current adapter circuit, the constant-current adapter circuit transmits the received constant-current power supplies to the lower constant-voltage conversion modules in the current constant-current power taking equipment, or the control modules in the lower constant-current power taking equipment, or a remote constant-current power supply equipment, the constant-current adapter circuit also receives a control signal of the management circuit, the control signal is provided by the control module, the constant-current adapter circuit performs coupling energy source and constant-voltage stabilizing processing under the control of the control signal to obtain the constant-voltage power supplies, the constant-voltage power supplies power to external power utilization equipment after the constant-voltage power supplies power to the voltage conversion circuit for voltage conversion, or the constant-current adapter circuit does not perform voltage control on voltage stabilizing control under the control of the coupling energy source under the control signal, the constant-voltage conversion module does not supply power, and the monitoring circuit monitors the actual output voltage value and outputs the actual voltage value and feeds back the.
3. The kinds of constant current supply optical network power-taking system of claim 2, wherein:
in each constant voltage conversion module, the constant voltage conversion end low voltage side circuit comprises a constant voltage conversion end constant current direct current sub-circuit, a constant voltage conversion end coupling voltage stabilization sub-circuit and a constant voltage conversion end low voltage conversion sub-circuit;
the constant-voltage conversion end constant-current direct-connection sub-circuit receives the control modules or the constant-current power supplies of the upper constant-voltage conversion modules, the constant-current power supplies are directly connected to the constant-current adapter circuit, meanwhile, energy sources are coupled to the constant-voltage conversion end coupling voltage stabilization sub-circuit to perform voltage stabilization control, low-voltage conversion is achieved through the constant-voltage conversion end low-voltage conversion sub-circuit, and power is supplied to the management circuit.
4. The kinds of constant current supply optical network power-taking system of claim 2, wherein:
in each constant voltage conversion module, the constant current adapter circuit mainly comprises a controllable constant current sub-circuit, a series coupling sub-circuit and a constant voltage stabilizing sub-circuit;
the management circuit sends a control signal to the controllable constant-current sub-circuit, the controllable constant-current sub-circuit receives a constant-current power supply output by a low-voltage side circuit at a constant-voltage conversion end, the constant-current power supply is directly connected to the lower constant-voltage conversion modules in the current constant-current power-taking equipment, or the control modules in the lower constant-current power-taking equipment, or the remote constant-current power supply equipment under the control of the control signal, at the moment, the controllable constant-current sub-circuit outputs no coupling energy to the series-connection coupling sub-circuit, the constant-voltage conversion modules do not supply power to the electric equipment, or the constant-current power supply is directly connected to the lower constant-voltage conversion modules in the current constant-current power-taking equipment, or the control modules in the lower constant-current power-taking equipment, or the remote constant-current power supply equipment under the control signal, the energy is coupled to the series-connection coupling sub-circuit to perform voltage stabilization control to obtain a constant-voltage direct-current power supply, and then the.
5. The kinds of constant current supply optical network power-taking system of claim 2, wherein:
in each constant voltage conversion module, the voltage conversion circuit comprises a low-pass filtering sub-circuit, a voltage conversion sub-circuit and a voltage-stabilizing filtering sub-circuit; the low-pass filter sub-circuit performs low-pass filtering on signals output by the constant-current adapter circuit, the voltage conversion sub-circuit performs voltage conversion on the signals output by the low-pass filter sub-circuit under the control of the management circuit, and the voltage stabilization filter sub-circuit performs voltage stabilization filtering on the output signals of the voltage conversion sub-circuit and then supplies power to external electric equipment; the monitoring circuit monitors the actual output voltage value of the voltage conversion sub-circuit and the actual output current value of the voltage stabilization filter sub-circuit.
6. The kinds of constant current supply optical network power-taking system of claim 2, wherein:
in each constant voltage conversion module, the monitoring circuit mainly comprises a current value monitoring sub-circuit and a voltage value monitoring sub-circuit; the voltage value monitoring sub-circuit monitors the actual output voltage value of the voltage conversion circuit and inputs the actual output voltage value to the management circuit; the current value monitoring sub-circuit monitors an actual output current value of the voltage conversion circuit and inputs the actual output current value to the management circuit.
7. The kinds of constant current supply optical network power-taking system of claim 2, wherein:
in each constant current power taking device, the control module comprises a control end low-voltage bypass circuit, a CPU and a memory;
the control module receives constant current sources of the extreme constant voltage conversion modules of external near-end constant current power supply equipment or upper constant current power supply equipment, the control end low-voltage side circuit is coupled with energy sources to supply power for the storage and the CPU, the control end low-voltage side circuit also leads the constant current sources of the extreme constant voltage conversion modules of the external near-end constant current power supply equipment or upper constant current power supply equipment to the lower constant voltage conversion modules, the CPU receives monitoring values of all the constant voltage conversion modules, sends control instructions to all the constant voltage conversion modules according to the monitoring values, adjusts the working states of all the constant voltage conversion modules, and the storage stores the monitoring values.
8. The kinds of constant current supply optical network power-taking system of claim 7, wherein:
in each control module, the control end low-voltage side circuit comprises a control end constant-current through sub-circuit, a control end coupling voltage-stabilizing sub-circuit and a control end low-voltage conversion sub-circuit, wherein the control end constant-current through sub-circuit receives a constant-current source and leads the constant-current source to lower constant-voltage conversion modules, and meanwhile, coupling energy is output to the control end coupling voltage-stabilizing sub-circuit to perform voltage-stabilizing control and then is sent to the control end low-voltage conversion sub-circuit to perform voltage conversion so as to supply power for a CPU and a memory.
9. The method for powering the power-taking system of the constant-current power supply optical network according to any of claims 1 to 8, wherein the method comprises the following steps:
(1) in the current constant-current power taking equipment, a control module calculates the real-time output power of a constant-voltage conversion module according to the actual output voltage value and the actual output current value of the constant-voltage conversion module to obtain the real-time output total power of the constant-current power taking equipment so as to determine the power consumption requirement of external power consumption equipment and control a corresponding number of constant-voltage conversion modules to be in an operating state; the actual output voltage value of the constant voltage conversion module in each operation state is in a preset range, or the difference obtained by subtracting the sum of the rated output power values of the constant voltage conversion modules in all operation states from the sum of the actual output power values of the constant voltage conversion modules in all operation states is in the preset range;
(2) when the power consumption requirement of the external power consumption equipment is changed, the control module re-sends a control signal to the constant voltage conversion module according to the newly monitored actual output voltage value and actual output current value, and increases or decreases the number of the constant voltage conversion modules in the running state;
(3) when a constant voltage conversion module breaks down, the control module sends a control instruction to the constant voltage conversion module to enable the constant voltage conversion module to be in a standby state, and sends control instructions to constant voltage conversion modules in other standby states to start a new constant voltage conversion module to be in an operating state.
10. The power taking method of the constant-current power supply optical network power taking system according to claim 9, wherein the power taking method comprises the following steps:
in the step (1), the actual output voltage value of the constant voltage conversion module in each operation state is greater than 90% of the rated output voltage value of the single constant voltage conversion module, or the sum of the actual output power values of the constant voltage conversion modules in all operation states is subtracted from the sum of the rated output power values of the constant voltage conversion modules in all operation states, and the obtained difference is less than 10% of the rated output power value of the single constant voltage conversion module.
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| CN116742786B (en) * | 2023-08-14 | 2023-10-20 | 四川中久大光科技有限公司 | Laser seed source and main control loop safety power supply circuit |
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