CN108667082B - Line loss compensation method, device and system - Google Patents
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Abstract
The invention discloses a line loss compensation method, a device and a system, which can determine the output current of a power supply and the cable parameters of a cable, determine the line loss voltage drop of the cable based on the output current and the cable parameters, and compensate the output voltage of the power supply according to the line loss voltage drop. Compared with the prior art, in the embodiment of the invention, a corresponding voltage compensation line or a voltage detection circuit is not required to be arranged at the load end, so that the implementation cost of the system can be reduced; the load end is not required to process and transmit the received actual voltage, so that the reliability of the system can be improved; and the power supply output is not required to be raised by a fixed voltage, so that the load regulation rate of the system can be ensured.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a line loss compensation method, device and system.
Background
In order to improve safety and maintenance convenience, and reduce cost and installation difficulty, it is common in the industry to set an antenna, a radio frequency power amplifier and corresponding accessories (i.e., devices that must be placed at a high position) at the top end of a communication base station transmission tower, and set a power supply of a load (i.e., the antenna, the radio frequency power amplifier and the corresponding accessories) at the bottom of the communication base station transmission tower (e.g., in a special machine room or an outdoor cabinet, etc.). However, since there is usually a long distance (e.g. 50m, 100m or 300 m) between the top end and the bottom end of the tower of the communication base station, when the power supply supplies power to the load, a large line loss voltage drop is likely to occur, which may cause the load to operate abnormally.
Currently, in order to reduce the line loss voltage drop between the power supply and the load, the following three methods are generally adopted:
in the first, a separate voltage detection line or voltage compensation circuit is provided at the load side. In this way, the power supply can adjust the output voltage of the power supply according to the actual voltage of the load end fed back by the voltage detection line or the voltage compensation circuit. However, this approach increases the cost since it requires the addition of a corresponding voltage compensation line or circuit at the load side.
In the second method, an independent voltage detection circuit is arranged at the load end. In this way, the voltage detection circuit can detect the actual voltage of the load end, process and operate the detected actual voltage to obtain a corresponding compensation feedback signal, and then transmit the compensation feedback signal back to the power supply in a wired way (namely, a physical cable) or a wireless way; the power supply can adjust the output voltage of the power supply according to the received compensation feedback signal. However, since this method still needs to provide a corresponding voltage detection circuit at the load end, the cost is still increased, and the load end also needs to process and transmit the actual voltage of the load, thereby further reducing the reliability of the system.
And thirdly, the output of the power supply raises the power supply voltage with a fixed value. In this way, the supply voltage may be raised by a fixed amount in advance when it is supplied to the load, so that the supply voltage transmitted to the load via the cable is sufficient to support the normal operation of the load even if lowered. However, this approach has significant limitations because it causes a significant load regulation problem.
That is, the conventional line loss compensation method has the problems of high implementation cost, low system reliability and poor load regulation rate.
Disclosure of Invention
The embodiment of the invention provides a line loss compensation method, a line loss compensation device and a line loss compensation system, which are used for solving the problems of high implementation cost, low system reliability, poor load regulation rate and the like of the existing line loss compensation method.
The embodiment of the invention provides a line loss compensation method, which comprises the following steps:
determining output current of a power supply and cable parameters of a cable;
determining a line loss voltage drop of the cable based on the output current and the cable parameter;
and compensating the output voltage of the power supply according to the line loss voltage drop.
Correspondingly, an embodiment of the present invention provides a line loss compensation apparatus, including:
the first determination module is used for determining the output current of the power supply and the cable parameters of the cable;
the second determination module is used for determining the line loss voltage drop of the cable based on the output current and the cable parameter;
and the compensation module is used for compensating the output voltage of the power supply according to the line loss voltage drop.
The invention has the following beneficial effects:
the embodiment of the invention provides a line loss compensation method, a device and a system, which can determine the output current of a power supply and the cable parameters of a cable, determine the line loss voltage drop of the cable based on the output current and the cable parameters, and compensate the output voltage of the power supply according to the line loss voltage drop. Compared with the prior art, in the embodiment of the invention, a corresponding voltage compensation line or a voltage detection circuit is not required to be arranged at the load end, so that the implementation cost of the system can be reduced; the load end is not required to process and transmit the received actual voltage, so that the reliability of the system can be improved; and the power supply output is not required to be raised by a fixed voltage, so that the load regulation rate of the system can be ensured. The problems of high implementation cost, low system reliability, poor load regulation rate and the like of the conventional line loss compensation method are solved, and the use experience and the satisfaction of a user are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a line loss compensation method according to a first embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a process of determining a line loss voltage drop according to a first embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a process of determining the compensation voltage according to a first embodiment of the invention;
fig. 4 is a schematic structural diagram of a line loss compensation apparatus according to a second embodiment of the present invention;
fig. 5 is a possible structure diagram of the line loss compensation system according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
in order to solve the problems of high implementation cost, low system reliability, poor load regulation rate, and the like of the conventional line loss compensation method, an embodiment of the present invention provides a line loss compensation method, which is a flowchart of the line loss compensation method according to the first embodiment of the present invention, as shown in fig. 1. Specifically, as shown in fig. 1, the line loss compensation method according to the first embodiment of the present invention may include the following steps:
step 101: determining output current of a power supply and cable parameters of a cable;
step 102: determining a line loss voltage drop of the cable based on the output current and the cable parameter;
step 103: and compensating the output voltage of the power supply according to the line loss voltage drop.
That is, in the embodiment of the present invention, the output current of the power supply and the cable parameter of the cable may be determined, the line loss voltage drop of the cable may be determined based on the output current and the cable parameter, and the output voltage of the power supply may be compensated according to the line loss voltage drop. Compared with the prior art, in the embodiment of the invention, a corresponding voltage compensation line or a voltage detection circuit is not required to be arranged at the load end, so that the implementation cost of the system can be reduced; the load end is not required to process and transmit the received actual voltage, so that the reliability of the system can be improved; and the power supply output is not required to be raised by a fixed voltage, so that the load regulation rate of the system can be ensured. The problems of high implementation cost, low system reliability, poor load regulation rate and the like of the conventional line loss compensation method are solved, and the use experience and the satisfaction of a user are improved.
The line loss compensation method according to the embodiment of the present invention may be executed by a corresponding line loss compensation device, and the line loss compensation device may be integrated into the power supply as an integrated device or may be independent from the power supply as an independent device.
It should be noted that, because each existing cable has a certain impedance characteristic, a more or less line loss voltage drop is inevitably caused, and the magnitude of the line loss voltage drop is often in direct relation with the cable parameters of the cable, and the cable parameters of the common cable are usually as shown in table 1:
table 1 Cable parameter table for common cables
As can be seen from table 1, the common cable parameters may not be limited to the specification, outer diameter, cross-sectional area, unit resistance (e.g. resistance per kilometer of cable), and the like of the cable. Of course, it should be noted that the cable parameters may also include other parameters, and the embodiment of the present invention is not limited in this respect.
Specifically, according to ohm's law, the line loss voltage drop of the cable may be obtained by the following equation 1:
Vdrop＝Ioutr formula 1;
wherein, the VdropRepresents the line loss voltage drop, IoutRepresenting the output current of the power supply, and R representing the equivalent resistance of the cable.
It should be noted that the equivalent resistance of the cable can be generally calculated by equation 2:
r ═ L · R formula 2;
where L represents the metric total length of the cable, which may typically be twice (one time) the distance between the power source and the load (cable distance, which is typically not a straight distance), and r represents the unit resistance of the cable (which may typically be the equivalent resistance per kilometer of cable).
Also, since the length unit of the cable is feet (ft) in many cases, feet (ft) can be first converted to meters (m) by equation 3:
L＝Lft0.3084 equation 3;
wherein L represents a metric total length of the cable, LftRepresenting the english total length of the cable.
Taking the specification of the adopted cable as AWG (American wire gauge) 6 as an example (in this case, as can be seen from table 1, the unit resistance of the cable is 1.33 Ω), the line loss voltage drop of the cable can be determined by the following steps (as shown in fig. 2):
s11: a metric distance between the power source and a load is determined.
For example, if the distance between the power source and the load is in metric units, the distance between the power source and the load may be directly determined as the metric distance between the power source and the load; if the unit of the distance between the power source and the load is english system unit or other unit types, the metric distance between the power source and the load can be calculated by a corresponding conversion formula (such as the above formula 3), which is not described herein again.
S12: determining an equivalent resistance of the cable.
Specifically, the equivalent resistance of the cable can be calculated according to equation 2, and still taking the above example as an example, the equivalent resistance of the cable can be obtained as
(note that the length of the cable may be twice the distance between the power source and the load, i.e., 304.8 x 2).
S13: determining a line loss voltage drop of the cable.
For example, assume that the port voltage of the output port of the power supply is 56V, andwhen the output power of the power supply is 1700W, the line loss and voltage drop of the cable can be calculated by formula 1
Similarly, assuming that the cable is not AWG6 but AWG1 with a larger diameter (in this case, as can be seen from table 1, the unit resistance of the cable is 0.42 Ω), and taking the distance between the power source and the load as 1000ft, the port voltage of the output port of the power source as 56V, and the output power of the power source as 1700W as examples, the equivalent resistance of the cable can be obtained by the above equation 2
The line loss voltage drop of the cable can be calculated by the formula 1
As can be seen from the above, when the distance between the power supply and the load is long, even if a cable with a large caliber is selected, a large line loss voltage drop still exists, and if no compensation is performed on the line loss voltage drop, the actual voltage received by the load end may be smaller than the required voltage of the load, which may cause the problems of the load such as incapability of starting, abnormal operation, or poor load regulation rate.
In the following, taking the distance between the power source and the load as 1000ft, the cable specification as AWG1, and the port voltage of the output port of the power source as 56V as an example, the corresponding relationship between the output power of the power source and the line loss voltage drop is briefly listed in table 2:
table 2 table of correspondence between output power and line loss voltage drop of cable
As can be seen from table 2, when the specification and length of the cable, the port voltage of the power output port, and the like are fixed, the line loss voltage drop increases with the increase of the output power of the power supply, that is, with the increase of the output current of the power supply, which is not described in detail herein.
Further, compensating the output voltage of the power supply according to the line loss voltage drop may specifically include:
determining corresponding compensation voltage according to the line loss voltage drop;
and performing primary compensation on the output voltage of the power supply according to the compensation voltage.
That is, after the line loss voltage drop of the cable is determined, a corresponding compensation voltage may be determined according to the line loss voltage drop, and then the compensation voltage may be added to the output voltage of the power supply to further adjust (boost or reduce) the output voltage of the power supply, so that the actual voltage at the load end may be affected to meet the actual demand of the load.
It should be noted that, in order to improve the accuracy of the line loss compensation, in an actual application process, the line loss compensation may be performed for multiple times in the following manner, until the new compensation voltage is smaller than the set voltage threshold (i.e. until the output voltage of the power supply meets the set port voltage requirement), the operation of the line loss compensation is not ended:
after compensating the output voltage of the power supply once (i.e. obtaining a new output voltage), re-determining a new output current of the power supply;
determining a new line loss voltage drop according to the new output current;
determining a corresponding new compensation voltage according to the new line loss voltage drop;
the output voltage of the power supply (which may be the new output voltage at this time) is compensated according to the new compensation voltage.
Optionally, determining a corresponding compensation voltage according to the line loss voltage drop may include:
taking the line loss voltage drop as the compensation voltage; or,
and determining the compensation voltage according to the line loss voltage drop and a set multivariable function.
The multivariate function is a set of value ranges of variables for characterizing the power supply and the load, and in a normal case, the multivariate function may not be limited to include an input voltage range (usually, a full-power input voltage range) when the power supply normally operates, a voltage range when the power supply normally operates, an output current range when the power supply normally operates, and a temperature range when the power supply normally operates; the allowable input voltage range of the load, the allowable temperature range of the load, etc. Of course, it should be noted that the variables may also include other variables as long as the accuracy of the determined compensation voltage can be improved, for example, the number of power modules connected in parallel in the power supply, and the more the variables of the multi-variable function are, the more accurate the determined compensation voltage is, which is not limited in this embodiment of the present invention.
It should be noted that the value ranges of the above variables can be flexibly set according to actual situations, for example, the input voltage range of the power supply during normal operation can be set to 176V to 300V (where, if the overvoltage protection voltage of the power supply is 296V, the range can be 176V to 296V, which is not described herein), the output voltage range of the power supply during normal operation can be set to 42V to 58V, the output current range of the power supply during normal operation can be set to 0A to 50A, the temperature range of the power supply during normal operation can be set to-40 ℃ to 60 ℃, the input voltage range allowed by the load can be set to 36V to 72V, the temperature range allowed by the load can be set to-40 ℃ to 60 ℃, and the like, which are not described herein.
As can be seen from the above, the determination method of the compensation voltage can be divided into two types:
the first, directly using the line loss voltage drop as the compensation voltage. For example, if the voltage required by the load is 54V, the initial output voltage of the power supply is 54V, the input current at the load end changes from 0A to 10A (the change value of the output current of the power supply is 10A), and the line loss voltage drop generated in the cable is 2.55V, the instantaneous input voltage at the load end can be reduced to 54-2.55 to 51.45V, so that the line loss voltage drop 2.55V can be directly compensated as the compensation voltage in the output voltage of the power supply, that is, the output voltage of the power supply is adjusted to 54+2.55 to 56.55V. At this time, the instantaneous input voltage at the load end may be a voltage value smaller than 56.55V and larger than 51.45V, thereby completing the line loss compensation. This is simple, but may result in power or load failure (e.g., over voltage, over temperature, overload, etc.);
and secondly, calculating to obtain corresponding compensation voltage according to the line loss voltage drop and a set multivariable function.
That is, after determining the corresponding line loss voltage drop, a simulation model may be established based on the line loss voltage drop and the value ranges of the variables in the multivariate function, and the compensation voltage is calculated according to the simulation model (for example, using a regression analysis or other methods), for example:
1. in a simulation model, adding the line loss voltage drop to the output voltage of the power supply, and if it is determined that the operation does not cause any fault of the power supply and the load (such as over-temperature, over-voltage, overload and the like), directly using the line loss voltage drop as the compensation voltage; or,
2. in a simulation model, the line loss voltage drop is added to the output voltage of the power supply, and if it is determined that this operation would cause a fault in the power supply and/or load, the line loss voltage drop cannot be taken as the compensation voltage drop. In this case, the corresponding compensation voltage is determined based on the line loss voltage drop and the multivariate function. For example, the line loss voltage drop is used as a compensation voltage, the position (such as a power supply side and a load side) where a fault occurs and the fault type (such as overvoltage, overtemperature and overload) are calculated, and then the corresponding compensation voltage is reversely calculated based on the calculated fault position and fault type.
As can be seen from the above, the second determination method of the compensation voltage (i.e. the method of calculating the corresponding compensation voltage according to the line loss voltage drop and the set multivariable function) is more complicated than the first determination method (i.e. the method of using the line loss voltage drop as the compensation voltage), but since the second determination method needs to consider more variables, the calculated compensation voltage is more accurate, and the safety of the power supply and/or the load can be better ensured.
Of course, it should be noted that, in practical applications, the compensation voltage may also be determined by combining the above two manners, for example, determining the compensation voltage in a first manner in a first stage (e.g., first compensation or first compensation) of the entire line loss compensation process, determining a new compensation voltage in a second manner in a second stage (e.g., second compensation or last compensation) of the entire line loss compensation process, and the like; or, determining the compensation voltage in a second manner in a first stage (such as first compensation or first compensation) of the whole line loss compensation process, determining a new compensation voltage in a first manner in a second stage (such as second compensation or last compensation) of the whole line loss compensation process, and the like; or, the compensation voltage is determined in a first manner at some stages (e.g., first compensation, third compensation) of the entire line loss compensation process, and a new compensation voltage is determined in a second manner at other stages (e.g., second compensation, fourth compensation, fifth compensation) of the entire compensation process, which is not described in detail in the embodiments of the present invention.
Optionally, before determining the line loss voltage drop of the cable, the line loss compensation method may further include:
and determining that the change value of the output current is not less than a set current threshold value.
The current threshold may be flexibly set according to actual conditions, for example, may be set to 0.1A, 5A, 10A, or 20A, and is not described herein again.
That is, before performing the line loss compensation, whether the line loss compensation is required or not may be selected first, and if the determined change value of the output current is smaller than the current threshold, no compensation may be selected; the compensation may be selected provided that the determined value of the change in the output current is not less than the current threshold. Of course, whether line loss compensation is needed or not can be selected according to other situations, and if the calculated line loss voltage drop is small, such as 0.1V, 0.2V and the like, no compensation can be selected; the compensation may be selected assuming that the calculated line loss voltage drop is large, such as 5V, 10V, 20V, etc. Whether line loss compensation is needed or not can be selected according to the actual requirement of the load, compensation can be selected if the precision requirement of the load on the input voltage is high, and uncompensation can be selected if the precision requirement of the load on the input voltage is low.
As shown in fig. 3, the line loss compensation method in the embodiment of the present invention is described in detail by way of example:
s21: determining output current of a power supply and cable parameters of a cable;
s22: and if the change value of the output current is not smaller than the set current threshold value, starting line loss compensation.
The current threshold may be flexibly set according to actual situations, for example, may be set to 0.1A, 5A, 10A, or 20A, and the like, which is not limited in this embodiment of the present invention.
S23: calculating line loss voltage drop;
s24: determining compensation voltage according to the line loss voltage drop and a set multivariable function;
s25: performing line loss compensation based on the compensation voltage;
s26: determining a new output current of the power supply;
s27: calculating a new line loss voltage drop;
s28: determining a new compensation voltage according to the new line loss voltage drop and the multivariate function;
s29: performing line loss compensation based on the new compensation voltage;
s30: and judging whether the new compensation voltage is smaller than a set voltage threshold value, and if not, executing the step S26 again.
The voltage threshold may be flexibly set according to an actual situation, for example, may be set at 0.1V, 0.2V, and the like, as long as it is ensured that the instantaneous input voltage at the load end meets an actual requirement of the load, which is not limited in this embodiment of the present invention.
S31: and if so, completing the line loss compensation.
Furthermore, it should be noted that the cable parameters of the cable can be determined in several ways:
firstly, determining cable parameters written in through a recording interface of the line loss compensation device (if the line loss compensation device is an integrated device integrated in the power supply, the recording interface of the line loss compensation device can be the recording interface of the power supply);
secondly, cable parameters written in through a dial switch of the line loss compensation device (if the line loss compensation device is an integrated device integrated in the power supply, the dial switch of the line loss compensation device can be the dial switch of the power supply) are determined;
thirdly, determining the written cable parameters through background software or monitoring (independently setting);
and fourthly, determining the cable parameters detected by the test module of the cable.
That is to say, in the embodiment of the present invention, there is no need to provide a corresponding voltage compensation line or a voltage detection circuit at the load end, and there is no need to provide an additional transmission path to obtain the voltage and the current of the load port, thereby reducing the implementation cost of the system and improving the reliability of the system.
It should be noted that the load described in the embodiment of the present invention may be a non-constant current load device, and details are not described here.
The embodiment of the invention provides a line loss compensation method, which can determine the output current of a power supply and the cable parameters of a cable, determine the line loss voltage drop of the cable based on the output current and the cable parameters, and compensate the output voltage of the power supply according to the line loss voltage drop. Compared with the prior art, in the embodiment of the invention, a corresponding voltage compensation line or a voltage detection circuit is not required to be arranged at the load end, so that the implementation cost of the system can be reduced; the load end is not required to process and transmit the received actual voltage, so that the reliability of the system can be improved; and the power supply output is not required to be raised by a fixed voltage, so that the load regulation rate of the system can be ensured. The problems of high implementation cost, low system reliability, poor load regulation rate and the like of the conventional line loss compensation method are solved, and the use experience and the satisfaction of a user are improved. Furthermore, in the embodiment of the present invention, the starting condition and the completing condition of the line loss compensation may further determine the range of the voltage fluctuation of the load port, and the compensation precision may further be determined by the speed and the number of times calculated by the internal software of the line loss compensation apparatus (in general, the faster the speed is, or the more the number of times is, the more precise the line loss compensation is, the smaller the voltage fluctuation of the load port is, and the faster the compensation is completed).
In addition, in the embodiment of the invention, the line loss compensation of the cable can be adjusted according to different load characteristics, for example, the voltage can be more accurate through advanced compensation, and the voltage can be more stable through delayed compensation.
Example two:
based on the same inventive concept as the first embodiment of the present invention, a second embodiment of the present invention provides a line loss compensation apparatus, as shown in fig. 4, which is a schematic structural diagram of the line loss compensation apparatus described in the second embodiment of the present invention. Specifically, as shown in fig. 4, the line loss compensation apparatus according to the second embodiment of the present invention may include:
a first determining module 41 operable to determine an output current of the power supply and a cable parameter of the cable;
a second determining module 42 operable to determine a line loss voltage drop of the cable based on the output current and the cable parameter;
and the compensation module 43 is configured to compensate the output voltage of the power supply according to the line loss voltage drop.
That is, the line loss compensation device according to the second embodiment of the present invention may include a first determining module configured to determine an output current of a power supply and a cable parameter of a cable, a second determining module configured to determine a line loss voltage drop of the cable based on the output current and the cable parameter, and a compensating module configured to compensate an output voltage of the power supply according to the line loss voltage drop. Compared with the prior art, in the embodiment of the invention, a corresponding voltage compensation line or a voltage detection circuit is not required to be arranged at the load end, so that the implementation cost of the system can be reduced; the load end is not required to process and transmit the received actual voltage, so that the reliability of the system can be improved; and the power supply output is not required to be raised by a fixed voltage, so that the load regulation rate of the system can be ensured. The problems that an existing line loss compensation device is high in implementation cost, low in system reliability, poor in load adjustment rate and the like are solved, and use experience and satisfaction of users are improved.
Further, the compensation module 43 is specifically configured to determine a corresponding compensation voltage according to the line loss voltage drop; and performing primary compensation on the output voltage of the power supply according to the compensation voltage.
Optionally, the first determining module 41 may be further configured to, after the compensating module 43 performs compensation on the output voltage of the power supply once according to the compensation voltage, cycle the following operations for multiple times until a new compensation voltage determined by the compensating module 43 is smaller than a set voltage threshold: re-determining a new output current of the power supply;
the second determining module 42 is further configured to determine a new line loss voltage drop according to the new output current;
the compensation module 43 may be further configured to determine a corresponding compensation voltage according to the new line loss voltage drop, and compensate the output voltage of the power supply according to the new compensation voltage.
Optionally, the compensation module 43 is specifically configured to use the line loss voltage drop as the compensation voltage; or, determining the compensation voltage according to the line loss voltage drop and a set multivariable function.
Further, the line loss compensation apparatus may further include a third determining module 44:
the third determining module 44 may be configured to determine that the variation value of the output current is not less than a set current threshold value before determining the line loss voltage drop of the cable.
It should be noted that, the line loss compensation device in the second embodiment of the present invention may be an integrated device integrated in a corresponding power supply, or may be an independent device independent from the power supply, and the embodiment of the present invention is not limited to this.
Furthermore, a second embodiment of the present invention further provides a line loss compensation system, as shown in fig. 5, which may include a power supply (in fig. 5, the power supply is disposed in a corresponding cabinet as an example), a load, and a line loss compensation device according to the second embodiment of the present invention (in fig. 5, the line loss compensation device is a line loss compensation device independent from the power supply as an example). Of course, the system may further include corresponding cables, cabinets, communication base station towers, and the like, which will not be described in detail.
The second embodiment of the invention provides a line loss compensation device and a system, which can comprise a first determining module for determining the output current of a power supply and the cable parameters of a cable, a second determining module for determining the line loss voltage drop of the cable based on the output current and the cable parameters, and a compensation module for compensating the output voltage of the power supply according to the line loss voltage drop. Compared with the prior art, in the embodiment of the invention, a corresponding voltage compensation line or a voltage detection circuit is not required to be arranged at the load end, so that the implementation cost of the system can be reduced; the load end is not required to process and transmit the received actual voltage, so that the reliability of the system can be improved; and the power supply output is not required to be raised by a fixed voltage, so that the load regulation rate of the system can be ensured. The problems that an existing line loss compensation device is high in implementation cost, low in system reliability, poor in load adjustment rate and the like are solved, and use experience and satisfaction of users are improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A line loss compensation method based on a simulation model is characterized by comprising the following steps:
determining output current of a power supply and cable parameters of a cable;
determining a line loss voltage drop of the cable based on the output current and the cable parameter;
compensating the output voltage of the power supply according to the line loss voltage drop;
according to the line loss voltage drop, compensating the output voltage of the power supply, specifically comprising:
determining corresponding compensation voltage according to the line loss voltage drop;
performing primary compensation on the output voltage of the power supply according to the compensation voltage;
determining a corresponding compensation voltage according to the line loss voltage drop, comprising:
establishing a simulation model based on the line loss voltage drop and the value ranges of all variables in a set multivariable function, adding the line loss voltage drop to the output voltage of the power supply in the simulation model, and taking the line loss voltage drop as the compensation voltage if the operation is determined not to cause the faults of the power supply and the load; if it is determined that the operation can cause the fault of the power supply and/or the load, the line loss voltage drop is used as a compensation voltage, the position where the fault can occur and the fault type are calculated, and the corresponding compensation voltage is reversely calculated based on the calculated fault position and the fault type.
2. The line loss compensation method of claim 1, wherein after compensating the output voltage of the power supply once according to the compensation voltage, the line loss compensation method further comprises compensating the output voltage of the power supply a plurality of times until the determined new compensation voltage is less than a set voltage threshold by:
re-determining a new output current of the power supply;
determining a new line loss voltage drop according to the new output current;
determining a corresponding new compensation voltage according to the new line loss voltage drop;
compensating the output voltage of the power supply according to the new compensation voltage.
3. The line loss compensation method of claim 1, wherein prior to determining the line loss voltage drop for the cable, the line loss compensation method further comprises:
and determining that the change value of the output current is not less than a set current threshold value.
4. A line loss compensation device based on a simulation model is characterized by comprising:
the first determination module is used for determining the output current of the power supply and the cable parameters of the cable;
the second determination module is used for determining the line loss voltage drop of the cable based on the output current and the cable parameter;
the compensation module is used for compensating the output voltage of the power supply according to the line loss voltage drop;
the compensation module is specifically used for determining corresponding compensation voltage according to the line loss voltage drop; compensating the output voltage of the power supply according to the compensation voltage;
the compensation module determines a corresponding compensation voltage according to the line loss voltage drop, and comprises: establishing a simulation model based on the line loss voltage drop and the value ranges of all variables in a set multivariable function, adding the line loss voltage drop to the output voltage of the power supply in the simulation model, and taking the line loss voltage drop as the compensation voltage if the operation is determined not to cause the faults of the power supply and the load; if it is determined that the operation can cause the fault of the power supply and/or the load, the line loss voltage drop is used as a compensation voltage, the position where the fault can occur and the fault type are calculated, and the corresponding compensation voltage is reversely calculated based on the calculated fault position and the fault type.
5. The line loss compensation apparatus of claim 4, further comprising a third determination module:
the third determining module is used for determining that the change value of the output current is not less than a set current threshold value before determining the line loss voltage drop of the cable.
6. A line loss compensation system, comprising a power supply, a load and a line loss compensation device as claimed in any one of claims 4 to 5.
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| WO2020082650A1 (en) * | 2018-10-24 | 2020-04-30 | 深圳市蓝禾技术有限公司 | Discharge method, charging equipment and computer storage medium |
| CN111106608B (en) * | 2020-01-14 | 2021-07-30 | 四川航电微能源有限公司 | Control method for voltage drop compensation of aircraft ground power supply cable |
| CN111244967B (en) * | 2020-01-21 | 2021-03-26 | 澄瑞电力科技（上海）有限公司 | Ship-shore voltage drop compensation system for shore power system |
| CN113972643A (en) * | 2020-07-24 | 2022-01-25 | 台达电子工业股份有限公司 | Line loss reducing method for power supply system and power supply system with line loss reducing function |
| CN116318406B (en) * | 2023-05-19 | 2023-08-08 | 深圳市飞思卓科技有限公司 | Signal compensation method and system for optical fiber communication system |
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