CN114268110B - Method and device for judging reactive compensation switching-on/off state of distribution transformer - Google Patents
Method and device for judging reactive compensation switching-on/off state of distribution transformer Download PDFInfo
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- CN114268110B CN114268110B CN202210200425.1A CN202210200425A CN114268110B CN 114268110 B CN114268110 B CN 114268110B CN 202210200425 A CN202210200425 A CN 202210200425A CN 114268110 B CN114268110 B CN 114268110B
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Abstract
The invention discloses a method and a device for judging reactive compensation switching-on/off states of a distribution transformer, wherein the method comprises the following steps: acquiring single-day 96-point measurement data of a distribution transformer, a low-voltage user meter connected with the distribution transformer, a feeder line to which the distribution transformer belongs, and parameter data of a distribution network to which the distribution transformer belongs; constructing a topological model according to the measured data and the parameter data; preprocessing the reactive power of the distribution transformer to be judged; and simulating the distribution transformer to be judged based on the preprocessed reactive power of the distribution transformer to be judged in combination with the topology model, and determining the reactive compensation switching state of the distribution transformer to be judged according to the simulation result. The technical scheme provided by the invention realizes that whether the reactive power compensation of the distribution transformer is put into use or not is accurately judged under the condition of incomplete measurement, avoids analysis obstacles caused by incomplete measurement data collection, and is beneficial to improving the reactive power flow simulation efficiency of the distribution network.
Description
Technical Field
The invention relates to the technical field of power distribution networks, in particular to a method and a device for judging reactive compensation switching states of a distribution transformer.
Background
The distribution line has the characteristics of complex topological structure, frequent equipment change and abnormal operation, variable operation modes and the like, and the reactive power flow distribution of the distribution network tends to be variable under the background of large-scale access of new energy such as distributed photovoltaic and wind power, so that higher requirements are provided for power flow analysis and load prediction work of the distribution network. The existing power distribution network analysis and prediction means relies on line equipment parameters and operation data in a power grid production management system, a GIS system and a metering automation system to carry out topology model construction and simulation analysis, wherein the reactive compensation switching state of a distribution transformer is an essential part.
In the prior art, the reactive power compensation switching-on/off state of the distribution transformer is mainly judged according to the multi-calendar history change condition of the power factor of the transformer, but the reactive power compensation switching-on/off state is constrained by conditions such as load property, load rate and historical metering data integrity, the accuracy of an analysis result is difficult to guarantee, and the efficiency is low.
Disclosure of Invention
The invention provides a method and a device for judging the reactive compensation switching-on/off state of a distribution transformer, which are used for determining the switching-on/off state of reactive compensation by analyzing single-day multipoint measurement data of the distribution transformer to be judged under the condition of incomplete multi-day measurement data and are beneficial to improving the power flow analysis efficiency of a power distribution network.
In a first aspect, the present invention provides a method for determining a reactive compensation switching state of a distribution transformer, including:
acquiring a distribution transformer, a low-voltage user meter connected with the distribution transformer, single-day 96-point measurement data of a feeder line to which the distribution transformer belongs, and parameter data of a power distribution network to which the distribution transformer belongs; the measurement data at least comprises the reactive power of the distribution transformer to be judged;
establishing a simulation model according to the measured data and the parameter data;
preprocessing the reactive power of the distribution transformer to be judged;
and simulating the distribution transformer to be judged based on the preprocessed reactive power of the distribution transformer to be judged in combination with the simulation model, and determining the reactive compensation switching-on and switching-off state of the distribution transformer to be judged according to the simulation result.
Optionally, the metrology data includes current, voltage, active power, reactive power, and power factor of the feeder, the distribution transformer, and the low-voltage utility meter; the parameter data comprises topology data of the power distribution network and parameter data of lines.
Optionally, the simulation model includes a topology model of the feeder line and a zone low-voltage topology model of the distribution transformer to be determined.
Optionally, the step of preprocessing the reactive power of the distribution transformer to be determined includes:
and determining positive and negative values of the reactive power of the distribution transformer to be judged, and sorting the reactive power of the distribution transformer to be judged into a positive power set and a negative power set.
Optionally, the step of simulating the distribution transformer to be judged based on the preprocessed reactive power of the distribution transformer to be judged in combination with the simulation model, and determining the reactive compensation switching-on/off state of the distribution transformer to be judged according to a simulation result includes:
if the reactive power of the distribution transformer to be judged does not have a negative value, performing load flow calculation simulation on the distribution transformer to be judged based on the distribution area low-voltage topological model to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be judged;
acquiring an actual measurement sum value of reactive power of a low-voltage user meter connected with the distribution transformer to be judged;
if (Q)Decrease in the thickness of the steel＋QFruit of Chinese wolfberry－QHead)*100%/QHeadIf the reactive compensation is more than or equal to 3%, determining that the reactive compensation of the distribution transformer to be judged is in an input state;
if (Q)Decrease in the thickness of the steel＋QFruit of Chinese wolfberry－QHead)*100%/QHeadIf the reactive compensation is less than 3%, determining that the reactive compensation of the distribution transformer to be judged is in an exit state;
Wherein QDamage toIs said low of the distribution transformer to be judgedReactive loss, Q, on the lineFruit of Chinese wolfberryFor the actual measured sum of the reactive power, Q, of the low-voltage household meters connected to the distribution transformer to be determinedHeadAnd obtaining the total reactive power of the head end of the distribution transformer to be judged.
Optionally, if the reactive power of the distribution transformer to be determined has no negative value, performing load flow calculation simulation on the distribution transformer to be determined based on the distribution area low-voltage topology model to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be determined, including:
respectively acquiring reactive power and active power of the distribution transformer to be judged and the low-voltage user meter in the single-day load peak value period, the average value period and the valley value period;
and carrying out load flow calculation simulation on the distribution transformer to be judged by adopting the distribution area low-voltage topological model according to the reactive power and the active power of the distribution transformer to be judged and the low-voltage user meter in the single-day load peak value period, the average value period and the valley value period so as to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be judged.
Optionally, the step of simulating the distribution transformer to be judged based on the preprocessed reactive power of the distribution transformer to be judged in combination with the simulation model, and determining the reactive compensation switching state of the distribution transformer to be judged according to the simulation result further includes:
If the reactive power of the distribution transformer to be judged has a negative value, performing load flow calculation simulation on the distribution transformer based on the topological model of the feeder line to obtain the simulation voltage of the low-voltage side of each distribution transformer;
acquiring the simulated voltage of the low-voltage side of the distribution transformer which is positioned in the same reactive power flow direction with the distribution transformer to be judged and is adjacent to the distribution transformer to be judged, and acquiring the actual measured value of the voltage of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judged at the same time;
if (U)f－Us)*100%/UsNot less than 3%, then determineThe reactive compensation of the distribution transformer to be judged is in an exit state;
if (U)f－Us)*100%/UsIf the reactive compensation is less than 3%, determining that the reactive compensation of the distribution transformer to be judged is in an input state;
wherein, UfIs the simulated voltage, U, of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judgedsAnd the actual measured value of the voltage of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judged is obtained.
Optionally, if the reactive power of the distribution transformer to be determined has a negative value, performing load flow calculation simulation on the distribution transformer based on the topology model of the feeder to obtain a simulated voltage of the low-voltage side of each distribution transformer includes:
Acquiring a time node corresponding to the negative reactive power of the distribution transformer to be judged, and acquiring the bus voltage of the feeder line on the time node and the active power and the reactive power of each distribution transformer;
and carrying out load flow calculation simulation on the distribution transformers by adopting a topological model of the feeder line in combination with the bus voltage of the feeder line and the active power and the reactive power of each distribution transformer so as to obtain the simulated voltage of the low-voltage side of each distribution transformer.
Optionally, when all the distribution transformers adjacent to the distribution transformer to be judged satisfy (U)f－Us)*100%/UsAnd when the reactive compensation is less than 3%, determining that the reactive compensation of the distribution transformer to be judged is in an input state.
In a second aspect, the present invention further provides a device for determining a reactive compensation on/off state of a distribution transformer, where the device includes: the data acquisition module is used for acquiring a distribution transformer, a low-voltage household meter connected with the distribution transformer, single-day 96-point measurement data of a feeder line to which the distribution transformer belongs, and parameter data of a distribution network to which the distribution transformer belongs; the measured data at least comprises the reactive power of the distribution transformer to be judged;
The model construction module is used for constructing a simulation model according to the measured data and the parameter data;
the preprocessing module is used for preprocessing the reactive power of the distribution transformer to be judged;
and the state determining module is used for simulating the distribution transformer to be judged by combining the simulation model based on the preprocessed reactive power of the distribution transformer to be judged, and determining the reactive compensation switching-on and switching-off state of the distribution transformer to be judged according to the simulation result.
According to the technical scheme provided by the invention, a simulation model is constructed according to the acquired single-day 96-point measurement data of the distribution transformer, the low-voltage household meter connected with the distribution transformer and the feeder line to which the distribution transformer belongs and the parameter data of the power distribution network to which the distribution transformer belongs, the preprocessed reactive power of the distribution transformer to be judged is combined with the simulation model to simulate the distribution transformer to be judged, and the reactive power compensation switching-off state of the distribution transformer to be judged is determined according to the simulation result. Compared with the mode of judging the low-voltage reactive compensation switching state through the multi-calendar history change condition of the power factor of the distribution transformer in the prior art, the technical scheme provided by the invention only needs to acquire the measurement data of 96 points (15 minutes/point) per day of the distribution transformer, the low-voltage household meter connected with the distribution transformer and the feeder line to which the distribution transformer belongs to judge whether a reactive compensation device is switched on, does not need to acquire the multi-calendar history change condition of the power factor of the distribution transformer, realizes the accurate judgment of whether the reactive compensation of the distribution transformer is switched on under the incomplete measurement condition, avoids the analysis obstacle caused by incomplete measurement data collection, and is favorable for improving the power flow reactive simulation efficiency of the distribution network. Because the method is not restricted by conditions such as load property, load rate, historical metering data integrity and the like, the accuracy of reactive compensation switching-on and switching-off state identification can be improved.
Drawings
Fig. 1 is a flowchart of a method for determining a reactive power compensation switching state of a distribution transformer according to the present invention;
fig. 2 is a flowchart of another method for determining a reactive power compensation switching state of a distribution transformer according to the present invention;
fig. 3 is a flowchart of a method for determining a reactive compensation on/off state of a distribution transformer according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a 10kV line topology structure provided by the present invention;
fig. 5 is a flowchart of a method for determining a reactive compensation on/off state of a distribution transformer according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a device for determining a reactive compensation on/off state of a distribution transformer according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the invention, the reactive compensation of the distribution transformer refers to devices such as a parallel capacitor and the like arranged at a distribution panel (cabinet) at the 400V low-voltage side of the transformer, and the devices have the functions of regulating reactive voltage and improving power factor. The reactive power compensation device of the distribution transformer on the actual site has the conditions of different configuration capacity, different product models, large difference of intelligent levels and the like, wherein the problems of no record of switching, disordered account, improper management and the like exist in manual switching; the intelligent switching has the problems of different switching rules, non-uploading of local data and the like, so that the judgment of the reactive compensation switching-on/off state of the distribution transformer is difficult. The invention provides a method for judging the reactive power compensation switching-on/off state of a distribution transformer aiming at the problems so as to reduce the difficulty in judging the reactive power compensation switching-on/off state of the distribution transformer. The method provided by the invention can realize the judgment of the reactive compensation switching state of the multi-space-time dimension distribution transformer under the incomplete measurement condition, wherein the incomplete measurement condition refers to that: the reactive compensation switching state of the distribution transformer to be judged is unknown, and the historical measurement data of the feeder line and the low-voltage user meter which the distribution transformer belongs to is incomplete for more than 2 days; "multi-spatiotemporal dimension" means: the distribution transformer to be judged, the feeder line of the distribution transformer and the low-voltage user meter connected with the distribution transformer are known in measurement data of 96 points (15 minutes/point) per day, the station-line-transformer-user topological relation is complete, and the inherent parameters of the power line are accurate.
Fig. 1 is a flowchart of a method for determining a reactive power compensation on/off state of a distribution transformer, and referring to fig. 1, the method for determining a reactive power compensation on/off state of a distribution transformer provided by the present invention includes:
s110, acquiring single-day 96-point measurement data of the distribution transformer, a low-voltage user meter connected with the distribution transformer, a feeder line to which the distribution transformer belongs, and parameter data of a power distribution network to which the distribution transformer belongs.
In particular, a distribution network is generally composed of distribution stations, feeders, distribution transformers and users, and includes, at the user end, low-voltage user meters connected to the distribution transformers. The single-day 96-point measurement data of the distribution transformer, the low-voltage user meter connected with the distribution transformer and the feeder line to which the distribution transformer belongs can be electrical parameters when the distribution transformer, the low-voltage user meter connected with the distribution transformer and the feeder line to which the distribution transformer belongs operate, wherein the single-day 96-point measurement data refers to electrical parameter data measured at 96 points (one point every 15 minutes) in real time within 24 hours. The parameter data of the power distribution network to which the distribution transformer belongs can be physical parameter data of the power distribution network. In this embodiment, the single-day 96-point measurement data at least includes the reactive power of the distribution transformer, since the reactive compensation switching status of the distribution transformer is to be identified.
It should be noted that there are multiple distribution transformers in the power distribution network, and when acquiring the measurement data of 96 points per day of the relevant equipment, the electrical parameters of each set of distribution transformers and the low-voltage user meter connected to the distribution transformers need to be acquired, so as to prepare for subsequently determining the reactive compensation switching state of the distribution transformers to be determined.
And S120, constructing a simulation model according to the measured data and the parameter data.
Specifically, after acquiring the distribution transformer, the low-voltage user meter connected with the distribution transformer, the single-day 96-point measurement data of the feeder line to which the distribution transformer belongs and the parameter data of the distribution network to which the distribution transformer belongs, a medium-low voltage simulation topology model is constructed according to the acquired related data, so that subsequent related steps can be simulated.
And S130, preprocessing the reactive power of the distribution transformer to be judged.
In particular, preprocessing refers to sorting and classifying the reactive power of all distribution transformers in the current distribution network. Illustratively, the reactive power of all distribution transformers is classified as being conditioned on positive and negative values to screen out the case where the reactive power is negative.
And S140, simulating the distribution transformer to be judged based on the preprocessed reactive power of the distribution transformer to be judged in combination with the simulation model, and determining the reactive compensation switching state of the distribution transformer to be judged according to the simulation result.
Specifically, according to the preprocessing result of the reactive power of the distribution transformer to be judged, a proper topological model is selected for simulation, and the reactive compensation switching-on/off state of the distribution transformer to be judged is determined according to the obtained simulation result. For example, according to the overflow effect of the low-voltage reactive compensation of the distribution transformer and the principle of lifting the voltage at the low-voltage side of the adjacent distribution transformer, the magnitude relation between the simulated value and the actual measurement value of the voltage at the low-voltage side of the adjacent distribution transformer of the distribution transformer to be judged is judged according to the simulation result to determine the on-off state of the reactive compensation, and if the simulated value and the actual measurement value meet the preset relation, the reactive compensation of the distribution transformer to be judged can be determined to be in the off state. The reactive power switching-on and switching-off state of the distribution transformer to be judged can be determined by comparing the magnitude relation between the reactive powers of the head end and the tail end of the distribution transformer to be judged according to the low-voltage reactive power compensation principle of the distribution transformer. If the reactive power of the tail end (namely the user end) of the distribution transformer to be judged is greater than that of the head end, it is indicated that the reactive power compensation of the distribution transformer to be judged is already put into use, otherwise, the state is an exit state.
According to the technical scheme, a simulation model is established according to the acquired single-day 96-point measurement data of the distribution transformer, the low-voltage household meter connected with the distribution transformer and the feeder line to which the distribution transformer belongs and the parameter data of the distribution network to which the distribution transformer belongs, the preprocessed reactive power of the distribution transformer to be judged is combined with the simulation model to simulate the distribution transformer to be judged, and the reactive compensation switching-off state of the distribution transformer to be judged is determined according to the simulation result. Compared with the mode of judging the low-voltage reactive power compensation switching state through the multi-calendar history change condition of the power factor of the distribution transformer in the prior art, the technical scheme provided by the invention only needs to acquire the measurement data of 96 points (15 minutes/point) per day of the distribution transformer, the low-voltage household meter connected with the distribution transformer and the feeder line to which the distribution transformer belongs to judge whether the reactive power compensation device is switched on, does not need to acquire the multi-calendar history change condition of the power factor of the distribution transformer, realizes the accurate judgment of whether the reactive power compensation device of the distribution transformer is switched on under the incomplete measurement condition, avoids the analysis obstacle caused by incomplete measurement data collection, and is favorable for improving the reactive power simulation efficiency of the power flow of the distribution network. Because the method is not constrained by conditions such as load property, load rate, historical metering data integrity and the like, the accuracy of reactive compensation switching-on and switching-off state identification can be improved.
Optionally, in this embodiment, the measured data includes current, voltage, active power, reactive power and power factor of the feeder, the distribution transformer and the low-voltage user meter, and optionally, the measured data may be obtained by sampling by the metering automation system. The parameter data comprises topological data of the power distribution network, parameter data of a feeder line, the model number and the wiring group of a distribution transformer, wherein the topological data can be topological data of a transformer substation, the feeder line, the distribution transformer and a low-voltage user meter, and the topological data can be acquired through a GIS system. The parameter data of the line comprises line diameter, length, line type, transformer model, wiring group and the like of the line, and the parameter data of the line can be searched through a user data manual.
Optionally, in the step S120, the simulation model includes a topology model of the feeder and a distribution area low-voltage topology model of the distribution transformer to be determined, and the model may be built by using ETAP simulation software.
Optionally, fig. 2 is a flowchart of another method for determining a reactive power compensation on/off state of a distribution transformer provided by the present invention, and referring to fig. 2, the method for determining a reactive power compensation on/off state of a distribution transformer provided by the present invention includes:
S110, acquiring single-day 96-point measurement data of a distribution transformer, a low-voltage user meter connected with the distribution transformer, a feeder line to which the distribution transformer belongs, and parameter data of a distribution network to which the distribution transformer belongs.
S1201, constructing a topological model of the feeder line and a zone low-voltage topological model of the distribution transformer to be judged according to the measurement data and the parameter data.
And S1301, determining positive and negative values of the reactive power of the distribution transformer to be judged, and sorting the reactive power of the distribution transformer to be judged into a positive power set and a negative power set.
Specifically, the preprocessing process comprises the steps of sorting the reactive power data of 96 points (15 minutes/point) on a single day of the distribution transformer to be judged, determining the positive and negative values of the reactive power of 96 points, and dividing the reactive power of 96 points on the single day of the distribution transformer to be judged into a positive power set and a negative power set according to the positive and negative values.
And S1401, if the reactive power of the distribution transformer to be judged does not have a negative value, performing load flow calculation simulation on the distribution transformer to be judged based on the transformer area low-voltage topological model to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be judged.
And S1402, acquiring an actual measurement sum value of the reactive power of the low-voltage user meter connected with the distribution transformer to be judged.
S1403, if (Q)Damage to＋QFruit of Chinese wolfberry－QHead)*100%/QHeadAnd if the reactive compensation is more than or equal to 3 percent, determining that the reactive compensation of the distribution transformer to be judged is in an input state.
S1404, if (Q)Decrease in the thickness of the steel＋QFruit of Chinese wolfberry－QHead)*100%/QHeadIf the voltage is less than 3%, determining the reactive power of the distribution transformer to be judgedThe compensation is an exit state.
Wherein Q isDecrease in the thickness of the steelFor the purpose of determining the reactive losses, Q, on the low-voltage line of a distribution transformerFruit of Chinese wolfberryFor the actual measured sum of reactive power, Q, of household meters connected to the distribution transformer to be determinedHeadThe total reactive power of the head end of the distribution transformer to be judged. Specifically, if the 96-point reactive power data of the distribution transformer to be judged do not have negative values, that is, the 96-point reactive power data of the distribution transformer to be judged are all positive power sets, the power flow calculation simulation is performed on the distribution transformer to be judged by adopting the transformer area low-voltage topological model, and a reactive loss simulation result Q on a low-voltage line of the distribution transformer to be judged is obtainedDecrease in the thickness of the steelThat is, the reactive loss of the low voltage side of the transformer to be determined is obtained (it should be understood that the reactive loss here is the total reactive loss of the low voltage side of the transformer to be determined). And obtaining a simulated value Q of reactive lossDecrease in the thickness of the steelAt the same corresponding time, obtaining the total reactive power Q of the head end of the distribution transformer to be judged HeadAnd the actual total value Q of the reactive power measurement of all the low-voltage user meters connected with the distribution transformer to be judgedFruit of Chinese wolfberry. According to the nearby compensation principle of low-voltage reactive compensation of the distribution transformer, the reactive loss simulation value Q of the distribution transformer to be judgedDecrease in the thickness of the steelAnd the actual total value Q of the reactive power measurement of all the low-voltage user meters connected with the distribution transformer to be judgedFruit of Chinese wolfberryAnd the total reactive power Q of the head end of the distribution transformer to be judgedHeadAnd comparing to determine the switching state of the reactive compensation of the distribution transformer to be judged. If (Q)Decrease in the thickness of the steel＋QFruit of Chinese wolfberry－QHead)*100%/QHeadAnd more than or equal to 3 percent, namely the sum of the reactive power loss of the low-voltage side of the distribution transformer to be judged and the actual reactive power of the low-voltage user meter connected with the distribution transformer to be judged is higher than or equal to 3 percent of the total reactive power of the head end of the distribution transformer to be judged, and then the reactive power compensation of the distribution transformer to be judged is determined to be in an input state. On the contrary, if (Q)Decrease in the thickness of the steel＋QFruit of Chinese wolfberry－QHead)*100%/QHeadLess than 3%, namely the sum of the reactive loss of the low-voltage side of the distribution transformer to be judged and the actual reactive power of the low-voltage user meter connected with the distribution transformerAnd if the value is lower than 3% of the total reactive power of the head end of the distribution transformer to be judged, determining that the reactive power compensation of the distribution transformer to be judged is in an exit state.
In a specific implementation process, the specific process of obtaining the simulation result of the reactive loss on the low-voltage line of the distribution transformer to be determined in step S1401 may be:
respectively obtaining reactive power and active power of a distribution transformer to be judged and a low-voltage household meter in the single-day load peak value period, the average value period and the valley value period; and carrying out load flow calculation simulation on the distribution transformer to be judged by adopting a distribution area low-voltage topological model according to the reactive power and the active power of the distribution transformer to be judged and the low-voltage household meter in the single-day load peak value period, the average value period and the valley value period so as to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be judged.
Specifically, in the case where it is determined that there is no negative value in the reactive power at the point of distribution transformer 96, all sets of positive reactive power are simulated. The low-voltage user meter is internally provided with 4 periods of points, peaks, levels and valleys, wherein the periods of points and peaks are time with high power consumption, the number of power users is large, the power consumption is large, the power grid can be insufficient in power supply, and the system frequency is reduced; the power consumption is normal and reasonable in use time, the power supply of a power grid is sufficient, and the frequency is stable; in valley, namely in the low valley period at night, the electric energy of the power grid is excessive, the frequency is increased, unbalance is caused, and the power supply system loses economy. In this embodiment, 3 time sections of the single-day load peak value, the average value and the valley value are selected, active power and reactive power of the distribution transformer to be judged and the connected distribution transformer area household meter on the 3 time sections are substituted into the distribution transformer area low-voltage topology model to be judged for load flow calculation simulation, and a reactive loss simulation result on the low-voltage line of the distribution transformer to be judged is obtained.
In the step, under the condition that the 96-point reactive power of the distribution transformer to be judged is a positive value, the station low-voltage topological model of the station of the distribution transformer to be judged is used for performing station reactive loss simulation on 3 time sections including peak, flat and valley values of a load per day, and preferably, an improved Newton-Raphson method can be adopted for load flow calculation.
Optionally, fig. 3 is a flowchart of a method for determining a reactive power compensation on/off state of a distribution transformer provided by the present invention, and referring to fig. 3, the method for determining a reactive power compensation on/off state of a distribution transformer provided by the present invention includes:
s110, acquiring single-day 96-point measurement data of the distribution transformer, a low-voltage user meter connected with the distribution transformer, a feeder line to which the distribution transformer belongs, and parameter data of a power distribution network to which the distribution transformer belongs.
S1201, constructing a topology model of the feeder line and a zone low-voltage topology model of the distribution transformer to be judged according to the measurement data and the parameter data.
S1301, determining the positive and negative values of the reactive power of the distribution transformer to be judged, and sorting the reactive power of the distribution transformer to be judged into a positive power set and a negative power set.
S1411, if the reactive power of the distribution transformer to be judged has a negative value, carrying out load flow calculation simulation on the distribution transformer based on the topology model of the feeder line to obtain the simulation voltage of the low-voltage side of each distribution transformer.
And S1412, acquiring the simulation voltage of the low-voltage side of the distribution transformer which is in the same reactive power flow direction as the distribution transformer to be judged and is adjacent to the distribution transformer to be judged, and acquiring the actual measurement value of the low-voltage side voltage of the distribution transformer adjacent to the distribution transformer to be judged at the same moment.
S1413, if (U)f－Us)*100%/UsAnd if the reactive compensation is more than or equal to 3%, determining that the reactive compensation of the distribution transformer to be judged is in an exit state.
S1414, if (U)f－Us)*100%/UsIf the reactive compensation is less than 3%, the reactive compensation of the distribution transformer to be judged is determined to be in an input state.
Wherein, UfFor the simulated voltage, U, of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be determinedsIs the actual measured value of the low-voltage side voltage of the distribution transformer adjacent to the distribution transformer to be judged. Specifically, if 96-point reactive power data of the distribution transformer are to be judgedAnd if negative values exist, classifying 96-point reactive power data of the distribution transformer to be judged into a positive power set and a negative power set, simulating the negative reactive power set of the distribution transformer to be judged by adopting a topological model of a feeder to obtain the simulated voltage of the low-voltage side of each distribution transformer, and acquiring the actual measured value of the voltage of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judged at the same time. According to the overflow effect of the reactive compensation of the distribution transformer and the lifting principle of the voltage of the low-voltage side of the adjacent distribution transformer, whether the reactive compensation of the distribution transformer to be judged is put into use or not is determined by comparing the simulated values and the actual measured values of the voltages of the low-voltage sides of other distribution transformers adjacent to the distribution transformer to be judged.
For example, the simulated voltage of the low-voltage side adjacent to the distribution transformer to be determined is UfAnd the actual measured value U of the voltage at the low-voltage side of the adjacent distribution transformer is positioned in the same reactive power flow direction with the distribution transformer to be judgedsIf (U)f－Us)*100%/UsNot less than 3 percent. That is, if the voltage simulation value of the low-voltage side of the same distribution transformer adjacent to the distribution transformer to be determined is higher than the actual measurement value, it is determined that the reactive compensation of the distribution transformer to be determined is in the exit state. If (U)f－Us)*100%/UsAnd less than 3%, that is to say, the voltage simulation value of the low-voltage side of the same distribution transformer adjacent to the distribution transformer to be judged is lower than the actual measurement value, and the voltage of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judged is increased, so that the reactive compensation of the distribution transformer to be judged is determined to be in an input state.
It should be noted that, in this embodiment, when there are a plurality of distribution transformers adjacent to the distribution transformer to be determined, the voltages of the low-voltage sides of all the distribution transformers satisfy (U)f－Us)*100%/UsWhen the reactive compensation is less than 3%, the reactive compensation of the distribution transformer to be judged is determined to be in an input state.
In an exemplary implementation process, the specific process of obtaining the simulated voltage of the low-voltage side of each distribution transformer in the step S1411 may be:
Acquiring a time node corresponding to a negative value of the reactive power of the distribution transformer to be judged, and acquiring the bus voltage of a feeder line on the time node and the active power and the reactive power of each distribution transformer;
and carrying out load flow calculation simulation on the distribution transformers by adopting a topological model of the feeder line in combination with the bus voltage of the feeder line and the active power and the reactive power of each distribution transformer so as to obtain the simulation voltage of the low-voltage side of each distribution transformer.
Specifically, under the condition that the reactive power of the 96 points of the distribution transformer to be judged has a negative value, a time section where the negative value reactive power is located is selected, and the bus voltage of a feeder line on a time node corresponding to the negative value reactive power of the distribution transformer to be judged on the time section and the active power and the reactive power of all the distribution transformers (including the distribution transformer to be judged) on the feeder line are substituted into a topological model of the feeder line to perform load flow calculation simulation, so that the simulation voltage of the low-voltage side of each distribution transformer is obtained. The method comprises the following steps of carrying out load flow calculation simulation at each moment when the reactive power of the distribution transformer to be judged is a negative value through a topological model of a feeder line, and preferably, carrying out load flow calculation by adopting an improved Newton-Raphson method.
Optionally, fig. 4 is a schematic diagram of a 10kV line topology structure provided by the present invention, fig. 5 is a flowchart of another method for determining a reactive compensation on/off state of a distribution transformer provided by the present invention, and a specific working principle of the method for determining a reactive compensation on/off state of a distribution transformer provided by the present invention is specifically described with reference to fig. 4 and fig. 5.
Fig. 4 provides a typical 10kV distribution line L, which includes 5 distribution transformers (respectively labeled as T1, T2, T3, T4, and T5, and the feeders to which the distribution transformers belong are all line L), wherein the distribution transformer to be determined is T3, 5 low-voltage user meters (respectively labeled as h1, h2, h3, h4, and h 5) are connected below T3, and R1, R2, R3, and R4 are line impedances.
S110, acquiring single-day 96-point measurement data of a distribution transformer, a low-voltage user meter connected with the distribution transformer, a feeder line to which the distribution transformer belongs, and parameter data of a distribution network to which the distribution transformer belongs.
Specifically, 10kV distribution line L, single-day 96-point (15 minutes/point) measurement data of distribution transformers (T1, T2, T3, T4, T5), low-voltage customer meters (h 1, h2, h3, h4, h 5), and parameter data (including station-line-to-variable-customer topology data, line parameter data) of a distribution network to which the distribution transformer belongs are acquired. The single-day 96-point (15-minute/point) measurement data comprises current, voltage, active power, reactive power, power factors and the like, and station-line-variable-user topology data can be acquired through a GIS system; the line parameter data comprises parameters such as line diameter, length, line type, transformer model and wiring group of the line.
S1201, constructing a topological model of the feeder line and a zone low-voltage topological model of the distribution transformer to be judged according to the measurement data and the parameter data. And building a medium-voltage topological model of the 10kV distribution line L and a distribution area low-voltage topological model of the distribution transformer T3 to be judged based on the data obtained in the step S110.
And S1301, determining positive and negative values of the reactive power of the distribution transformer to be judged, and sorting the reactive power of the distribution transformer to be judged into a positive power set and a negative power set.
Specifically, the reactive power data of 96 points (15 minutes/point) on a single day of the distribution transformer to be judged are sorted, positive and negative values of the reactive power of 96 points are determined, and the reactive power of 96 points on the single day of the distribution transformer to be judged is divided into a positive power set and a negative power set according to the positive and negative values.
And S1401, if the reactive power of the distribution transformer to be judged does not have a negative value, performing load flow calculation simulation on the distribution transformer to be judged based on the transformer area low-voltage topological model to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be judged.
And S1402, acquiring an actual measurement sum value of the reactive power of the low-voltage user meter connected with the distribution transformer to be judged.
S151, determining (Q) Damage to＋QFruit of Chinese wolfberry－QHead)*100%/QHeadWhether the content is greater than or equal to 3 percent.
Specifically, simulation analysis is performed on the positive power set of the distribution transformer T3 to be judged. Selecting 3 time cross sections of the single-day load peak, the single-day load peak and the single-day load valley, substituting active power and reactive power of the distribution transformer T3 to be judged and the station area household tables (h 1, h2, h3, h4 and h 5) connected with the distribution transformer T3 on the 3 time cross sections into the station area low-voltage topological model of the distribution transformer T3 to be judged for load flow calculation simulation, and obtaining a reactive loss simulation result on the low-voltage line of the distribution transformer T3 to be judged.
In this embodiment, it is assumed that the total reactive power at the head end of the distribution transformer T3 to be determined at the selected peak moment of the load per day is QHeadThe simulation result of the reactive power loss of the transformer area is QDecrease in the thickness of the steelThe actual reactive power measurement values of the low-voltage subscriber meters (h 1, h2, h3, h4 and h 5) in the transformer area are Q1, Q2, Q3, Q4 and Q5.
Calculating the reactive power sum Q of the distribution area house tables (h 1, h2, h3, h4 and h 5) corresponding to 3 time sections of the single-day load peak, level and valley of the distribution transformer T3 to be judgedFruit of Chinese wolfberry（QFruit of Chinese wolfberry= Q1+ Q2+ Q3+ Q4+ Q5), and the simulation result of reactive loss of the platform area is QDecrease in the thickness of the steelAdding the total value to obtain a total value, and adding the total value to the total reactive power Q of the head end of the distribution transformer T3 to be judged HeadAnd comparing to judge whether the sum is higher than the total reactive power by more than 3 percent. If (Q)Decrease in the thickness of the steel＋QFruit of Chinese wolfberry－QHead)*100%/QHeadMore than or equal to 3 percent, determining that the reactive compensation of the distribution transformer T3 to be judged is in an input state, if (Q)Decrease in the thickness of the steel＋QFruit of Chinese wolfberry－QHead)*100%/QHeadIf the reactive compensation is less than 3%, the reactive compensation of the distribution transformer T3 to be judged is determined to be in an exit state.
S1411, if the reactive power of the distribution transformer to be judged has a negative value, carrying out load flow calculation simulation on the distribution transformer based on the topology model of the feeder line to obtain the simulation voltage of the low-voltage side of each distribution transformer.
And S1412, acquiring the simulation voltage of the low-voltage side of the distribution transformer which is in the same reactive power flow direction as the distribution transformer to be judged and is adjacent to the distribution transformer to be judged, and acquiring the actual measurement value of the low-voltage side voltage of the distribution transformer adjacent to the distribution transformer to be judged at the same moment.
S152, judgment (U)f－Us)*100%/UsWhether or not it is 3% or more.
Specifically, a negative power set of the distribution transformer T3 to be determined is subjected to simulation analysis. Selecting the time section of each negative value in the negative power set, and connecting the bus voltage U of the 10kV distribution line L on the time section0And substituting the active power and the reactive power of the distribution transformers (T1, T2, T3, T4 and T5) into the topological model of the 10kV distribution line L to perform load flow calculation simulation, so as to obtain a simulation result of the voltage of the low-voltage side of each transformer. Assuming that the negative power set has only 1 value, the simulation result of the voltage at the low-voltage side of each distribution transformer at the moment corresponding to the negative value is U f1、Uf2、Uf3、Uf4、Uf5The actual voltage measurement value is Us1、Us2、Us3、Us4、Us5。
Selecting a low-voltage side voltage simulation value U of a distribution transformer T2 and a distribution transformer T4 which are adjacent in the front and back and are positioned in the same reactive power flow direction as the distribution transformer T3 to be judgedf2、Uf4And comparing the actual voltage measurement values Us2 and Us4 of the distribution transformer T2 and the distribution transformer T4 at the moment, if (U)f2－Us2)*100%/Us2Not less than 3%, and (U)f4－Us4)*100%/Us4And if the reactive compensation is more than or equal to 3 percent, determining that the reactive compensation of the distribution transformer T3 to be judged is in an exit state. If (U)f2－Us2)*100%/Us2< 3% and (U)f4－Us4)*100%/Us4If the reactive compensation is less than 3%, the reactive compensation of the distribution transformer T3 to be judged is determined to be in an input state.
According to the technical scheme provided by the invention, the judgment of the low-voltage reactive compensation switching state of the distribution transformer is realized by analyzing the single-day multipoint (96-point) measurement data of the distribution transformer to be judged and performing topology modeling simulation according to the overflow effect of the reactive compensation of the distribution transformer and the lifting principle of the voltage at the low-voltage side of the adjacent distribution transformer or the nearby compensation principle of the reactive compensation of the distribution transformer. Compared with the existing method for judging the low-voltage reactive power compensation switching-on/off state through the multi-calendar history change condition of the power factor of the distribution transformer, the method provided by the embodiment only needs to select the measurement data of 96 points (15 minutes/point) in a single day, avoids the analysis obstacle caused by incomplete measurement data collection, and is beneficial to improving the reactive power flow simulation efficiency of the distribution network.
Fig. 6 is a schematic structural diagram of a device for determining a reactive power compensation on/off state of a distribution transformer according to the present invention, and referring to fig. 6, the device for determining a reactive power compensation on/off state of a distribution transformer includes:
the data acquisition module 11 is used for acquiring single-day 96-point measurement data of a distribution transformer, a low-voltage user meter connected with the distribution transformer, a feeder line to which the distribution transformer belongs, and parameter data of a distribution network to which the distribution transformer belongs; the measurement data at least comprises the reactive power of the distribution transformer to be judged;
the model building module 12 is used for building a simulation model according to the measured data and the parameter data;
the preprocessing module 13 is used for preprocessing the reactive power of the distribution transformer to be judged;
and the state determining module 14 is configured to simulate the distribution transformer to be judged by combining the simulation model based on the preprocessed reactive power of the distribution transformer to be judged, and determine the reactive compensation switching state of the distribution transformer to be judged according to a simulation result.
The device for judging the reactive power compensation switching-on/off state of the distribution transformer is used for executing the method for judging the reactive power compensation switching-on/off state of the distribution transformer provided by any embodiment, has corresponding functional modules and beneficial effects of the execution method, and is not repeated.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (8)
1. A method for judging reactive compensation switching-on/off states of a distribution transformer is characterized by comprising the following steps:
acquiring a distribution transformer, a low-voltage user meter connected with the distribution transformer, single-day 96-point measurement data of a feeder line to which the distribution transformer belongs, and parameter data of a power distribution network to which the distribution transformer belongs; the measurement data at least comprises the reactive power of the distribution transformer to be judged;
establishing a simulation model according to the measured data and the parameter data; the simulation model comprises a topology model of the feeder line and a distribution area low-voltage topology model of the distribution transformer to be judged;
Preprocessing the reactive power of the distribution transformer to be judged;
simulating the distribution transformer to be judged based on the preprocessed reactive power of the distribution transformer to be judged in combination with the simulation model, and determining the reactive compensation switching-on and switching-off state of the distribution transformer to be judged according to the simulation result;
if the reactive power of the distribution transformer to be judged does not have a negative value, performing load flow calculation simulation on the distribution transformer to be judged based on the transformer area low-voltage topological model to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be judged, and determining the reactive compensation switching-on and switching-off state of the distribution transformer to be judged according to the reactive loss simulation result;
if the reactive power of the distribution transformer to be judged has a negative value, performing load flow calculation simulation on the distribution transformer based on the topological model of the feeder line to obtain the simulation voltage of the low-voltage side of each distribution transformer, and determining the reactive compensation switching state of the distribution transformer to be judged according to the simulation voltage of the low-voltage side of the distribution transformer.
2. The method for judging the reactive power compensation switching-on/off state of the distribution transformer according to claim 1, wherein the step of preprocessing the reactive power of the distribution transformer to be judged comprises the following steps:
And determining positive and negative values of the reactive power of the distribution transformer to be judged, and sorting the reactive power of the distribution transformer to be judged into a positive power set and a negative power set.
3. The method for judging the reactive power compensation switching-on/off state of the distribution transformer according to claim 2, wherein after obtaining the reactive power loss simulation result on the low-voltage line of the distribution transformer to be judged, the step of determining the reactive power compensation switching-on/off state of the distribution transformer to be judged according to the reactive power loss simulation result comprises the steps of:
acquiring an actual measurement sum value of reactive power of a low-voltage user meter connected with the distribution transformer to be judged;
if (Q)Damage to＋QFruit of Chinese wolfberry－QHead)*100%/QHeadIf the reactive compensation is more than or equal to 3%, determining that the reactive compensation of the distribution transformer to be judged is in an input state;
if (Q)Damage to＋QFruit of Chinese wolfberry－QHead)*100%/QHeadIf the reactive compensation is less than 3%, determining that the reactive compensation of the distribution transformer to be judged is in an exit state;
wherein Q isDecrease in the thickness of the steelFor said reactive losses, Q, on the low-voltage line of the distribution transformer to be determinedFruit of Chinese wolfberryFor the actual measured sum of the reactive power, Q, of the low-voltage household meters connected to the distribution transformer to be determinedHeadAnd obtaining the total reactive power of the head end of the distribution transformer to be judged.
4. The method for determining the reactive power compensation switching-on/off state of the distribution transformer according to claim 2, wherein after obtaining the simulated voltage of the low voltage side of each distribution transformer, the step of determining the reactive power compensation switching-on/off state of the distribution transformer to be determined according to the simulated voltage of the low voltage side of the distribution transformer further comprises:
acquiring the simulated voltage of the low-voltage side of the distribution transformer which is positioned in the same reactive power flow direction with the distribution transformer to be judged and is adjacent to the distribution transformer to be judged, and acquiring the actual measured value of the voltage of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judged at the same time;
if (U)f－Us)*100%/UsIf the reactive compensation is more than or equal to 3%, determining that the reactive compensation of the distribution transformer to be judged is in an exit state;
if (U)f－Us)*100%/UsIf the reactive compensation is less than 3%, determining that the reactive compensation of the distribution transformer to be judged is in an input state;
wherein, UfIs the simulated voltage, U, of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judgedsAnd the actual measured value of the voltage of the low-voltage side of the distribution transformer adjacent to the distribution transformer to be judged is obtained.
5. The method for determining the reactive power compensation on/off state of the distribution transformer as claimed in claim 4, wherein when all the distribution transformers adjacent to the distribution transformer to be determined satisfy (U) f－Us)*100%/UsAnd when the reactive compensation is less than 3%, determining that the reactive compensation of the distribution transformer to be judged is in an input state.
6. The method for determining the reactive power compensation switching-on/off state of the distribution transformer according to claim 1, wherein if the reactive power of the distribution transformer to be determined has a negative value, performing load flow calculation simulation on the distribution transformer based on the topology model of the feeder to obtain a simulated voltage on the low voltage side of each distribution transformer comprises:
acquiring a time node corresponding to the negative reactive power of the distribution transformer to be judged, and acquiring the bus voltage of the feeder line on the time node and the active power and the reactive power of each distribution transformer;
and carrying out load flow calculation simulation on the distribution transformers by adopting a topological model of the feeder line in combination with the bus voltage of the feeder line and the active power and the reactive power of each distribution transformer so as to obtain the simulated voltage of the low-voltage side of each distribution transformer.
7. The method for determining the reactive power compensation switching status of the distribution transformer according to claim 1, wherein the measured data includes current, voltage, active power, reactive power and power factor of the feeder, the distribution transformer and the low-voltage user meter; the parameter data comprises topology data of the power distribution network and parameter data of lines.
8. The utility model provides a distribution transformer reactive compensation puts in discriminating gear of moving back state which characterized in that includes:
the data acquisition module is used for acquiring a distribution transformer, a low-voltage user meter connected with the distribution transformer, single-day 96-point measurement data of a feeder line to which the distribution transformer belongs, and parameter data of a distribution network to which the distribution transformer belongs; the measurement data at least comprises the reactive power of the distribution transformer to be judged;
the model construction module is used for constructing a simulation model according to the measurement data and the parameter data; the simulation model comprises a topology model of the feeder line and a distribution area low-voltage topology model of the distribution transformer to be judged;
the preprocessing module is used for preprocessing the reactive power of the distribution transformer to be judged;
the state determining module is used for simulating the distribution transformer to be judged based on the preprocessed reactive power of the distribution transformer to be judged in combination with the simulation model, and determining the switching-on/off state of reactive compensation of the distribution transformer to be judged according to a simulation result;
the state determining module is specifically configured to, if the reactive power of the distribution transformer to be determined does not have a negative value, perform load flow calculation simulation on the distribution transformer to be determined based on the distribution area low-voltage topology model to obtain a reactive loss simulation result on a low-voltage line of the distribution transformer to be determined, and determine a reactive compensation switching state of the distribution transformer to be determined according to the reactive loss simulation result;
If the reactive power of the distribution transformer to be judged has a negative value, performing load flow calculation simulation on the distribution transformer based on the topological model of the feeder line to obtain the simulation voltage of the low-voltage side of each distribution transformer, and determining the reactive compensation switching state of the distribution transformer to be judged according to the simulation voltage of the low-voltage side of the distribution transformer.
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| PCT/CN2023/076831 WO2023165348A1 (en) | 2022-03-03 | 2023-02-17 | Method and device for determining switching state of reactive compensation of distribution transformer |
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| CN117526348B (en) * | 2024-01-08 | 2024-03-22 | 成都汉度科技有限公司 | Reactive power compensation method and reactive power compensation system for transformer area based on peak-to-valley time period |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518513A (en) * | 2013-09-30 | 2015-04-15 | 北京电研华源电力技术有限公司 | Power distribution network voltage regulation and reactive compensation whole-network coordination control method and device |
| CN111049157A (en) * | 2020-03-12 | 2020-04-21 | 广东电网有限责任公司佛山供电局 | Distribution network transformer reactive compensation condition analysis method |
| CN112787398A (en) * | 2020-10-16 | 2021-05-11 | 中国电力科学研究院有限公司 | Intelligent power distribution network exception handling method and system |
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| CN108390458A (en) * | 2018-02-12 | 2018-08-10 | 国网山东省电力公司平阴县供电公司 | Alarm system and method are moved back in a kind of throwing of transforming plant main transformer |
| JP7196528B2 (en) * | 2018-10-17 | 2022-12-27 | 富士電機株式会社 | Reactive power compensation system |
| CN109949178B (en) * | 2019-02-22 | 2023-06-16 | 国网安徽省电力公司 | Method for judging and complementing power failure event of medium-voltage distribution network based on support vector machine |
| CN111478340B (en) * | 2020-04-16 | 2021-08-31 | 广东电网有限责任公司 | Distribution network line reactive compensation condition analysis method |
| CN113159339B (en) * | 2021-04-20 | 2023-08-04 | 国网江西省电力有限公司信息通信分公司 | One-area one-index line loss management method and system based on big data |
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|---|---|---|---|---|
| CN104518513A (en) * | 2013-09-30 | 2015-04-15 | 北京电研华源电力技术有限公司 | Power distribution network voltage regulation and reactive compensation whole-network coordination control method and device |
| CN111049157A (en) * | 2020-03-12 | 2020-04-21 | 广东电网有限责任公司佛山供电局 | Distribution network transformer reactive compensation condition analysis method |
| CN112787398A (en) * | 2020-10-16 | 2021-05-11 | 中国电力科学研究院有限公司 | Intelligent power distribution network exception handling method and system |
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