CN117081112A - Method and device for treating three-phase imbalance of flexible transformer area - Google Patents
Method and device for treating three-phase imbalance of flexible transformer area Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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Abstract
The invention discloses a method and a device for treating three-phase unbalance of a flexible platform region, wherein the method comprises the following steps: acquiring electricity consumption data of a system ammeter in real time to acquire a three-phase unbalanced state of the system, and obtaining a power average value P based on A, B, C three-phase power values aver Then the three-phase power value and the power average value P are combined aver Making a difference value to obtain a three-phase power difference value, calculating N-phase power based on the three-phase power difference value, and judging whether to adjust the three-phase power value according to the N-phase power; sampling the load three-phase voltage value in real time, and calculating a system three-phase unbalance value Y according to the calculated load three-phase voltage value nb1 Judging whether the control conditions are met, and controlling the three-phase power of the system when the control conditions are met. The invention avoids the practical problems of low treatment effect, low reaction speed and the like caused by the conventional management means such as electrician phase modulation, load distribution and the like, can practically solve the treatment of the three-phase imbalance of the existing flexible transformer area, and ensures the stable and reliable operation of the power grid system.
Description
Technical Field
The invention relates to a power grid management control based on a flexible direct current interconnection system, in particular to a method and a device for managing three-phase unbalance of a flexible transformer area.
Background
Urban and rural population is further concentrated by urban and rural population promotion, and power supply capacity of power distribution network transformers in partial areas such as urban and rural areas is weaker, lines are aged and have large impedance, and user power loads are mainly single-phase loads and are unevenly distributed, and are particularly influenced by factors such as seasons, weather, holidays and the like.
Searching related patents about a three-phase imbalance treatment method and a system thereof, patent publication No. CN113922395A provides a three-phase imbalance treatment method and a system thereof, aiming at a distribution network of a low-voltage station, the invention solves the problem that the prior art has great difficulty in solving the problem of three-phase imbalance through conventional electrician phase modulation, load distribution and other management means, judges whether the self-correlation of a distribution transformer is higher than a preset threshold value by calculating the self-correlation of the distribution transformer under the low-voltage station, establishes a single-phase table phase judgment strategy based on current calculation or voltage calculation for the three-phase imbalance treatment strategy according to the comparison result of the self-correlation of the distribution transformer and the preset threshold value, calculates the pearson correlation coefficient of the distribution transformer and the single-phase table under the distribution transformer based on the single-phase table phase judgment strategy, iterates to calculate the current loss of the low-voltage station, and stops iterating calculation to output the treatment strategy of the current three-phase imbalance under the low-voltage station when the iterated number of times reaches the threshold value of iterated times or the current loss can not be reduced. However, the scheme lacks consideration of the topological structure of the distribution area, does not effectively consider the branches and the tail ends of the distribution area, can cause the actual problems of low treatment effect, mismatching strategy and the like, and is complex in calculation. Patent publication number CN114566987a provides a three-phase imbalance multi-objective optimization method for a distribution area based on a distribution network topology structure, but lacks consideration of subordinate loss of topology branches, actual compensation is difficult to guarantee precision, and meanwhile, a plurality of compensation devices are mutually independent, negative interaction influence is easy to generate during compensation, and compensation efficiency is low. The existing method also has the problem that positive and negative sequences need to be judged, and processing logic is complex.
Disclosure of Invention
The invention aims to: the invention provides a method for treating three-phase unbalance of a flexible transformer area, which solves the defects of complex topological structure and low efficiency in the conventional treatment of the three-phase unbalance of the flexible transformer area and ensures the stable and reliable operation of a power grid system.
The invention also provides a device, equipment and a computer storage medium for treating the three-phase imbalance of the flexible transformer area.
The technical scheme is as follows: in a first aspect, the invention provides a method for treating three-phase imbalance of a flexible platform region, which comprises the following steps:
acquiring electricity consumption data of a system ammeter in real time, and calculating three-phase power average value P according to A, B, C three-phase power values aver ；
Respectively combining the three-phase power value and the power average value P aver Difference is made to obtain a three-phase power difference value P A1 、P B1 、P C1 ；
Based on three-phase power difference P A1 、P B1 、P C1 Determining N-phase power, judging whether the N-phase power meets three-phase power adjustment conditions, and adjusting three-phase power values when the N-phase power meets the conditions;
sampling the three-phase voltage value of the load in real time, and calculating the three-phase unbalance Y of the system based on the voltage value nb1 ；
Based on the calculated system three-phase imbalance value Y nb1 Judging whether the three-phase unbalance treatment condition is met or not, and if so, judging the three-phase unbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 And calculating a secondary three-phase power difference value of the system, issuing the secondary three-phase power difference value to the system, and controlling the three-phase power.
Preferably, the calculation formula of the N-phase power is as follows:
the judging whether the N-phase power meets the three-phase power adjustment condition comprises the following steps: judging P nb1 Whether or not it is greater than a preset power limit value P nbs When (when)P nb1 >P nbs When the three-phase power control method meets the three-phase power control condition, the system is protected and stopped, and the three-phase power value is reset
Preferably, the three-phase imbalance value Y nb1 Is calculated as follows:wherein U is max(a,b,c) Represents the maximum value of A, B, C three-phase voltage values, U aver An average value of A, B, C three-phase voltage values is shown.
Preferably, determining whether the three-phase imbalance treatment condition is satisfied includes: will calculate the three-phase unbalance value Y nb1 And a preset three-phase unbalance degree threshold Y nb2 Comparing when Y nb1 Greater than Y nb2 When the three-phase unbalance treatment condition is met.
Preferably, according to the three-phase imbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 The calculating system secondary three-phase power difference value comprises the following steps:
using three-phase imbalance values Y nb1 And a three-phase imbalance threshold Y nb2 The three-phase unbalance rate K is calculated,acquiring power unbalance values of each phase based on a three-phase unbalance rate K, wherein the power unbalance value of the A phase is +.> Phase B power imbalance value is +.>The phase C power imbalance value is +.>Calculating the three-phase power imbalance mean +.>As regulating power, the regulating power is utilized to acquire three-phase power difference again as the issued power value, wherein the A-phase secondary power difference is P A3 ＝P A2 -P nb3 The difference of the B phase secondary power is P B3 ＝P B2 -P nb3 The difference of the secondary power of the C phase is P C3 ＝P C2 -P nb3 。
In a second aspect, the present invention provides a device for treating three-phase imbalance in a flexible transformer area, comprising:
the power average value calculation module is used for acquiring electricity utilization data of the system ammeter in real time and calculating three-phase power average value P according to A, B, C three-phase power values aver ；
The power difference calculation module is used for respectively calculating three-phase power values and power average values P aver Difference is made to obtain a three-phase power difference value P A1 、P B1 、P C1 ；
Power adjustment module based on three-phase power difference P A1 、P B1 、P C1 Determining N-phase power, judging whether the N-phase power meets three-phase power adjustment conditions, and adjusting three-phase power values when the N-phase power meets the conditions;
the three-phase unbalance degree calculation module is used for sampling load three-phase voltage values in real time and calculating the three-phase unbalance degree Y of the system based on the voltage values nb1 ；
The power management module is used for calculating a three-phase imbalance value Y of the system nb1 Judging whether the three-phase unbalance treatment condition is met or not, and if so, judging the three-phase unbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 And calculating a secondary three-phase power difference value of the system, issuing the secondary three-phase power difference value to the system, and controlling the three-phase power.
In a third aspect, the present invention also provides a computer device comprising: one or more processors; a memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs when executed by the processors implement the steps of the flexible-bay three-phase imbalance management method according to the first aspect of the present invention.
In a fourth aspect, the present invention also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the steps of the method for managing a three-phase imbalance of a flexible substation according to the first aspect of the present invention.
The beneficial effects are that:
1. the flexible transformer area generally uses a plurality of devices for power adjustment, and because the plurality of devices are used, the power grid state of the tail end of the topological branch can be acquired, and the line loss can be acquired. According to the invention, a three-phase imbalance treatment strategy is formulated based on the current three-phase imbalance condition, and a plurality of devices can be interconnected when in use, so that a power flow network capable of accurately monitoring is formed, and negative interaction influence among single devices can be avoided in treatment.
2. The invention realizes the proportional power distribution through the voltage, does not need three-phase load Pearson calculation, and has simple calculation and obvious effect. The method for treating the three-phase unbalance of the power distribution network is self-adaptive in phase sequence, does not need to judge the positive and negative sequences, and is convenient and practical.
3. The invention avoids the practical problems of low treatment effect, low reaction speed and the like caused by the conventional management means such as electrician phase modulation, load distribution and the like, can practically solve the treatment of the three-phase imbalance of the existing flexible transformer area, and ensures the stable and reliable operation of the power grid system.
Drawings
FIG. 1 is a schematic diagram of an application of a three-phase imbalance remediation device of the present invention;
FIG. 2 is a flow chart of a three-phase imbalance remediation method of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the system topology of the three-phase imbalance treatment device of the flexible transformer area comprises a measurement and control device and a power grid treatment device, wherein the measurement and control device consists of 2 AC/DC conversion units, and the AC/DC conversion units are interconnected through a direct current bus. The measurement and control device is used for measuring the three-phase balance state of the power grid and controlling the power grid management device, and the power grid management device is used for adjusting the three-phase power by utilizing the three-phase sub-control capability of the AC/DC converter unit so as to adjust the three-phase unbalanced state of the power grid connected with the AC/DC converter unit.
Referring to fig. 2, the three-phase imbalance treatment method of the invention acquires the three-phase imbalance state of the system by collecting the electricity consumption data of the system ammeter in real time, and obtains the three-phase power average value P based on A, B, C three-phase power values aver Then the three-phase power value and the power average value P are combined aver The difference is made to obtain a three-phase power difference P A1 、P B1 、P C1 Determining N-phase power based on the three-phase power difference value, and adjusting three-phase power values in real time based on the N-phase power; system three-phase imbalance value Y by using load three-phase voltage value nb1 Based on the three-phase unbalance value Y calculated in practice nb1 And determining whether the system is abnormal, and if so, controlling by using a secondary three-phase power difference value of the system.
In one embodiment, the three-phase imbalance treatment method of the invention specifically comprises the following steps:
and S1, collecting electricity utilization data of the system ammeter in real time, and calculating the average value of the three-phase power.
And preprocessing is performed after the system power consumption data are acquired, and the acquired data are unified in unit and precision, so that the follow-up calculation is convenient.
Based on system ammeter data, A, B, C three-phase power value P is obtained a 、P b 、P c Calculating the average value P of the three-phase power of the load end aver 。
P aver ＝(P a +P b +P c )/3 (1)
Step S2, using the obtained three-phase power value and the power average value P aver Making a difference value to obtain a A, B, C three-phase power difference value P A1 ，P B1 ，P C1 。
And S3, calculating N-phase power according to the three-phase power difference value, judging whether the N-phase power meets the three-phase power adjustment condition, and adjusting the three-phase power value when the N-phase power meets the condition.
Will P A1 ，P B1 ，P C1 Substituting the power P into the formula (3) to obtain N-phase power P nb1 ：
By using the calculated N-phase power P nb1 Participate in regulating three-phase power, P nb1 And a preset power limit threshold P nbs (the threshold is set according to the power that N line can withstand, such as 20 kW), if P nb1 Exceeding the limit value P nbs The hardware circuit can cause hardware damage due to overcurrent, and the protection machine is required to reset the three-phase power. If P nb1 Not exceeding P nbs The power monitoring is continued.
Step S4, sampling the load three-phase voltage value U in real time a 、U b 、U c Calculating the average value U of the voltage aver 。
U aver ＝(U a +U b +U c )/3 (4)
Calculating three-phase unbalance value Y of system according to voltage value nb1 ：
Step S5, according to the calculated system three-phase unbalance value Y nb1 Judging whether the treatment condition is satisfied, and if so, judging the three-phase unbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 And calculating a secondary three-phase power difference value of the system, and treating the three-phase power of the system.
According to an embodiment of the invention, Y nb2 Is a preset value related to the capability that the hardware N phase can withstand. If Y nb1 Less than a preset threshold Y nb2 The system is normal at present, the three-phase power of the system is not treated, otherwise, the power unbalance value of each phase is obtained by calculating the three-phase unbalance rate, the three-phase power unbalance average value is calculated to be used as the regulating power, and the regulating power is used for obtaining the three-phase power difference value again, namely the secondary three-phase power difference value, to be used as the issued power value.
Specifically, when Y nb1 Greater than or equal to a preset threshold Y nb2 When the method is used, the treatment is carried out according to the following mode:
three-phase imbalance ratio of the computing system:
calculating imbalance values of power of each phase based on the three-phase imbalance ratio:
wherein P is A2 Is the power unbalance value of phase A, P B2 For the B-phase power imbalance value, P C2 Is the C phase power imbalance value;
calculating a three-phase power imbalance mean value of the system:
to calculate the P nb3 As the regulated power, the secondary three-phase power difference of the system is calculated, namely, the difference is made between the secondary three-phase power difference and the regulated power on the basis of the original power:
P A3 ＝P A2 -P nb3
P B3 ＝P B2 -P nb3 (9)
P C3 ＝P C2 -P nb3
administering by means of a difference in two-phase three-phase power, i.e. calculating P A3 、P B3 、P C3 And issuing a system to finish the final three-phase unbalance treatment.
The three-phase unbalance management method based on the flexible transformer area system solves the defects of complex topological structure and low efficiency of the existing flexible transformer area three-phase unbalance management, and ensures the stable and reliable operation of the power grid system. And secondly, the adopted algorithm design is completely based on the original system hardware architecture, so that additional structural modification of the system is not needed, and the use cost of a user is greatly reduced.
For example, the transformer capacity of a residential district is 100kVA, the power consumption of the residential district is less than 20kVA in 10:00-18:00 in summer, but the active power of the power consumption of 17:00-22:00 in afternoon is 80kW on average, and after long-time operation, the transformer is burnt out due to serious three-phase imbalance, and at the moment, the three-phase power is 10kW, 30kW and 60kW respectively according to field data.
According to the obtained power value, calculating a load end three-phase power average value Paver:
three-phase power difference values PA1, PB1, PC1 are calculated:
P A1 ＝P a -P aver ＝-23.3kW
P B1 ＝P b -P aver ＝-3.3kW
P C1 ＝P c -P aver ＝26.7kW
calculating N-phase power P nb1 ：
The N lines in the examples can bear 20kW of power, P nb1 Greater than power limit P nbs At this time, protection stop and reset are carried outThree-phase power values.
Three-phase voltage values of 220V, 228V and 210V are collected in real time, and three-phase voltage average values are calculated:
calculating the three-phase unbalance value Y of a system nb1 ：
System three-phase imbalance threshold Y nb2 Let 0.015, calculate the three-phase imbalance rate of the system:
calculating the power unbalance value of A, B, C phases respectively:
calculating a three-phase power imbalance mean value of the system:
to calculate the P nb3 As regulated power, the secondary three-phase power difference of the system is calculated:
P A3 ＝P A2 -P nb3 ＝-8.83kW+0.01kW＝-8.82kW
P B3 ＝P B2 -P nb3 ＝-1.25kW+0.01kW＝-1.24kW
P C3 ＝P C2 -P nb3 ＝10.11kW+0.01kW＝10.12kW
then P is added A3 、P B3 、P C3 And the power is sent to an AC/DC converter for power output.
The invention also provides a device for treating the three-phase imbalance of the flexible platform region, which comprises:
the power average value calculation module is used for acquiring electricity utilization data of the system ammeter in real time and calculating three-phase power average value P according to A, B, C three-phase power values aver ；
The power difference calculation module is used for respectively calculating three-phase power values and power average values P aver Difference is made to obtain a three-phase power difference value P A1 、P B1 、P C1 ；
Power adjustment module based on three-phase power difference P A1 、P B1 、P C1 Determining N-phase power, judging whether the N-phase power meets three-phase power adjustment conditions, and adjusting three-phase power values when the N-phase power meets the conditions;
the three-phase unbalance degree calculation module is used for sampling load three-phase voltage values in real time and calculating the three-phase unbalance degree Y of the system based on the voltage values nb1 ；
The power management module is used for calculating a three-phase imbalance value Y of the system nb1 Judging whether the three-phase unbalance treatment condition is met or not, and if so, judging the three-phase unbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 And calculating a secondary three-phase power difference value of the system, issuing the secondary three-phase power difference value to the system, and controlling the three-phase power.
Preferably, the calculation formula of the N-phase power is as follows:
judging whether the N-phase power isMeeting the three-phase power adjustment condition includes: judging P nb1 Whether or not it is greater than a preset power limit value P nbs When P nb1 >P nbs And when the three-phase power control system meets the three-phase power control condition, protecting and stopping the system, and resetting the three-phase power value.
Preferably, the three-phase imbalance value Y nb1 Is calculated as follows:wherein U is max(a,b,c) Represents the maximum value of A, B, C three-phase voltage values, U aver An average value of A, B, C three-phase voltage values is shown.
Preferably, determining whether the three-phase imbalance treatment condition is satisfied includes: will calculate the three-phase unbalance value Y nb1 And a preset three-phase unbalance degree threshold Y nb2 Comparing when Y nb1 Greater than Y nb2 When the three-phase unbalance treatment condition is met.
Preferably, according to the three-phase imbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 The calculating system secondary three-phase power difference value comprises the following steps:
using three-phase imbalance values Y nb1 And a three-phase imbalance threshold Y nb2 The three-phase unbalance rate K is calculated,acquiring power unbalance values of each phase based on a three-phase unbalance rate K, wherein the power unbalance value of the A phase is +.> Phase B power imbalance value is +.>The phase C power imbalance value is +.>Calculating the three-phase power imbalance mean +.>As regulating power, the regulating power is utilized to acquire three-phase power difference again as the issued power value, wherein the A-phase secondary power difference is P A3 ＝P A2 -P nb3 The difference of the B phase secondary power is P B3 ＝P B2 -P nb3 The difference of the secondary power of the C phase is P C3 ＝P C2 -P nb3 。
The present invention also provides a computer device comprising: one or more processors; a memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, which when executed by the processors implement the steps of the flexible-bay three-phase imbalance management method as described above.
The invention also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the steps of the flexible bay three-phase imbalance remediation method as described above.
It will be appreciated by those skilled in the art that embodiments of the invention may be provided as a method, apparatus, computer 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 invention is described with reference to flow charts of methods according to embodiments of the invention. It will be understood that each flow in the flowchart, and combinations of flows in the flowchart, 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.
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.
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.
Claims (12)
1. The method for treating the three-phase unbalance of the flexible station area is characterized by comprising the following steps of:
acquiring electricity consumption data of a system ammeter in real time, and calculating three-phase power average value P according to A, B, C three-phase power values aver ；
Respectively combining the three-phase power value and the power average value P aver Difference is made to obtain a three-phase power difference value P A1 、P B1 、P C1 ；
Based on three-phase power difference P A1 、P B1 、P C1 Determining N-phase power, judging whether the N-phase power meets three-phase power adjustment conditions, and adjusting three-phase power values when the N-phase power meets the conditions;
sampling the three-phase voltage value of the load in real time, and calculating the three-phase unbalance Y of the system based on the voltage value nb1 ；
Based on the calculated system three-phase imbalance value Y nb1 Judging whether the three-phase unbalance treatment condition is met or not, and if so, judging the three-phase unbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 And calculating a secondary three-phase power difference value of the system, issuing the secondary three-phase power difference value to the system, and controlling the three-phase power.
2. The method of claim 1, wherein the N-phase power is calculated as:
the judging whether the N-phase power meets the three-phase power adjustment condition comprises the following steps: judging P nb1 Whether or not it is greater than a preset power limit value P nbs When P nb1 >P nbs And when the three-phase power control system meets the three-phase power control condition, protecting and stopping the system, and resetting the three-phase power value.
3. The method according to claim 1, characterized in that the three-phase imbalance value Y nb1 Is calculated as follows:wherein U is max(a,b,c) Represents the maximum value of A, B, C three-phase voltage values, U aver An average value of A, B, C three-phase voltage values is shown.
4. The method of claim 1, wherein determining whether a three-phase imbalance remediation condition is met comprises: will calculate the three-phase unbalance value Y nb1 And a preset three-phase unbalance degree threshold Y nb2 Comparing when Y nb1 Greater than Y nb2 When the three-phase unbalance treatment condition is met.
5. The method according to claim 1, wherein the three-phase imbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 The calculating system secondary three-phase power difference value comprises the following steps:
using three-phase imbalance values Y nb1 And a three-phase imbalance threshold Y nb2 The three-phase unbalance rate K is calculated,acquiring power unbalance values of each phase based on a three-phase unbalance rate K, wherein the power unbalance value of the A phase is +.> Phase B power imbalance value is +.>The phase C power imbalance value is +.>Calculating the three-phase power imbalance mean +.>As regulating power, the regulating power is utilized to acquire three-phase power difference again as the issued power value, wherein the A-phase secondary power difference is P A3 ＝P A2 -P nb3 The difference of the B phase secondary power is P B3 ＝P B2 -P nb3 The difference of the secondary power of the C phase is P C3 ＝P C2 -P nb3 。
6. The utility model provides a device is administered to unbalanced three phase in flexible platform district which characterized in that includes:
the power average value calculation module is used for acquiring electricity utilization data of the system ammeter in real time and calculating three-phase power average value P according to A, B, C three-phase power values aver ；
The power difference calculation module is used for respectively calculating three-phase power values and power average values P aver Difference is made to obtain a three-phase power difference value P A1 、P B1 、P C1 ；
Power adjustment module based on three-phase power difference P A1 、P B1 、P C1 Determining N-phase power, judging whether the N-phase power meets three-phase power adjustment conditions, and adjusting three-phase power values when the N-phase power meets the conditions;
the three-phase unbalance degree calculation module is used for sampling load three-phase voltage values in real time and calculating the three-phase unbalance degree Y of the system based on the voltage values nb1 ；
The power management module is used for calculating a three-phase imbalance value Y of the system nb1 Judging whether the three-phase unbalance treatment condition is met or not, and if so, judging the three-phase unbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 And calculating a secondary three-phase power difference value of the system, issuing the secondary three-phase power difference value to the system, and controlling the three-phase power.
7. The apparatus of claim 6 wherein the N-phase power is calculated as:
the judging whether the N-phase power meets the three-phase power adjustment condition comprises the following steps: judging P nb1 Whether or not it is greater than a preset power limit value P nbs When P nb1 >P nbs And when the three-phase power control system meets the three-phase power control condition, protecting and stopping the system, and resetting the three-phase power value.
8. The device according to claim 6, wherein the three-phase imbalance value Y nb1 Is calculated as follows:wherein U is max(a,b,c) Represents the maximum value of A, B, C three-phase voltage values, U aver An average value of A, B, C three-phase voltage values is shown.
9. The apparatus of claim 6, wherein determining whether a three-phase imbalance remediation condition is satisfied comprises: will calculate the three-phase unbalance value Y nb1 And a preset three-phase unbalance degree threshold Y nb2 Comparing when Y nb1 Greater than Y nb2 When the three-phase unbalance treatment condition is met.
10. The device according to claim 6, wherein the three-phase unbalance value Y nb1 And three-phase power difference P A1 、P B1 、P C1 The calculating system secondary three-phase power difference value comprises the following steps:
using three-phase imbalance values Y nb1 And a three-phase imbalance threshold Y nb2 The three-phase unbalance rate K is calculated,acquiring power unbalance values of each phase based on a three-phase unbalance rate K, wherein the power unbalance value of the A phase is +.> Phase B power imbalance value is +.>The phase C power imbalance value is +.>Calculating the three-phase power imbalance mean +.>As regulating power, the regulating power is utilized to acquire three-phase power difference again as the issued power value, wherein the A-phase secondary power difference is P A3 ＝P A2 -P nb3 Secondary of B phaseThe power difference is P B3 ＝P B2 -P nb3 The difference of the secondary power of the C phase is P C3 ＝P C2 -P nb3 。
11. A computer device, comprising:
one or more processors;
a memory;
and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, which when executed by the processors, implement the steps of the flexible-bay three-phase imbalance management method of any of claims 1-5.
12. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the method for managing a three-phase imbalance of a flexible substation area according to any one of claims 1-5.
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| CN202310984208.0A CN117081112A (en) | 2023-08-04 | 2023-08-04 | Method and device for treating three-phase imbalance of flexible transformer area |
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| CN202310984208.0A CN117081112A (en) | 2023-08-04 | 2023-08-04 | Method and device for treating three-phase imbalance of flexible transformer area |
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