阅读说明：本技术 配电网线损校验方法以及系统 (Power distribution network line loss checking method and system ) 是由 李坤 杨成涛 李燕 苏兴磊 邵方冰 杨立超 王艳琪 于 2019-04-09 设计创作，主要内容包括：本发明公开了一种配电网线损校验方法以及系统,方法包括：安装在配电网的配电变压器二次侧的综合设备采集配电变压器二次侧的运行数据,并同步获取安装在配电网各个末端的各个末端采集设备所采集的末端的运行数据；从多个维度对综合设备以及末端采集设备所采集的运行数据进行校验；在校验合格后依据所采集的运行数据计算线损理论值；校验所述线损理论值是否合格,本发明对数据进行多维度校验,而且集中数据在综合设备进行线损计算并校验,保证了计算的可靠性,整个过程简单准确。(The invention discloses a method and a system for checking the line loss of a power distribution network, wherein the method comprises the following steps: the method comprises the steps that comprehensive equipment arranged on the secondary side of a distribution transformer of the power distribution network collects operation data of the secondary side of the distribution transformer and synchronously obtains operation data of tail ends collected by tail end collecting equipment arranged at each tail end of the power distribution network; verifying the operation data collected by the comprehensive equipment and the tail end collecting equipment from multiple dimensions; calculating a line loss theoretical value according to the collected operation data after the verification is qualified; the invention checks whether the line loss theoretical value is qualified or not, carries out multi-dimensional check on the data, and carries out line loss calculation and check on the integrated equipment by centralizing the data, thereby ensuring the reliability of calculation and having simple and accurate whole process.)

1. A power distribution network line loss checking method is characterized by comprising the following steps:

the method comprises the steps that comprehensive equipment arranged on the secondary side of a distribution transformer of the power distribution network collects operation data of the secondary side of the distribution transformer and synchronously obtains operation data of tail ends collected by tail end collecting equipment arranged at each tail end of the power distribution network;

verifying the operation data collected by the comprehensive equipment and the tail end collecting equipment from multiple dimensions;

calculating a line loss theoretical value according to the collected operation data after the verification is qualified;

and checking whether the line loss theoretical value is qualified or not.

2. The method of claim 1, wherein verifying the operational data collected by the integrated device and the terminal collection device from the plurality of dimensions comprises:

analyzing whether the currently acquired operation data is in a range determined by an upper limit value and a lower limit value of the operation data corresponding to the distribution transformer;

analyzing whether the currently collected operation data conforms to the variation trend of the historical operation data acquired by the comprehensive equipment;

analyzing whether the currently collected operation data and the historical operation data at the same time are in a reasonable fluctuation range;

if the three analyses are passed, judging that the currently acquired operation data passes the verification, otherwise, judging that the currently acquired operation data has errors, and not passing the verification of the operation data.

3. The method of claim 1, wherein calculating line loss theoretical values from the collected operational data comprises:

taking each outgoing line of a distribution transformer of a power distribution network as a calculation unit, wherein the tail ends of all outgoing lines form each tail end of the power distribution network;

the following calculations are performed for each calculation unit: according to the outlet voltage U of the distribution transformer collected during the maximum load of the distribution network_maxAnd the voltage U of the end of the current computing unit_max-iCalculating the voltage loss rate DeltaU of the calculating unit at the time of maximum load_max-iPercent; based on the voltage loss rate DeltaU_max-i% Power loss Rate Δ P at maximum load_max-iPercent; based on the power loss ratio Δ P_max-i% calculating the electric energy loss rate Delta A of the current calculation unit_iPercent, and further calculating daily loss electric energy delta A of the current calculating unit_i；

According to eachDaily power loss Delta A of each calculation unit_iAnd counting to obtain the total station area loss delta A corresponding to the distribution transformer as the theoretical line loss value.

4. The method of claim 1,

voltage loss rate Δ U_max-i% is calculated based on the following calculation:

power loss ratio Δ P_max-i% is calculated based on the following calculation:

ΔP_max-i％＝K_P*ΔU_max-i％；

electric energy loss rate Delta A of the ith calculation unit_i% is calculated based on the following calculation:

the daily power loss Delta A of the ith computing unit_iCalculated based on the following calculation formula:

ΔA_i＝A_i·ΔA_i％；

the total loss Δ a of the distribution room is calculated based on the following calculation formula:

in the above formula: k_PObtained by looking up a table according to the wire number and the power factor, or according to a calculation formula

5. The method of claim 1, wherein said verifying said line loss theoretical value is acceptable comprises: and analyzing whether the line loss theoretical value is in a range determined by a normal line loss threshold value, and if the line loss theoretical value passes the analysis, judging that the line loss theoretical value is not verified.

6. The utility model provides a distribution network line loss check-up system which characterized in that includes:

the terminal acquisition equipment is arranged at each terminal of the power distribution network and used for acquiring operation data of the terminal;

the comprehensive equipment is installed at the distribution transformer secondary side of distribution network for gather the operational data of distribution transformer secondary side, and the terminal operational data that each terminal acquisition equipment gathered is acquireed in step, carry out the check-up to the operational data that comprehensive equipment and terminal acquisition equipment gathered from a plurality of dimensions, calculate line loss theoretical value according to the operational data that gathers after the check-up is qualified, the check-up whether line loss theoretical value is qualified.

7. The system of claim 6, wherein the integrated device comprises an operational data verification unit to:

analyzing whether the currently acquired operation data is in a range determined by an upper limit value and a lower limit value of the operation data corresponding to the distribution transformer;

analyzing whether the currently collected operation data conforms to the variation trend of the historical operation data acquired by the comprehensive equipment;

analyzing whether the currently collected operation data and the historical operation data at the same time are in a reasonable fluctuation range;

if the three analyses are passed, judging that the currently acquired operation data passes the verification, otherwise, judging that the currently acquired operation data has errors, and not passing the verification of the operation data.

8. The system of claim 6, wherein the integrated device comprises a line loss theoretical value calculation unit configured to:

taking each outgoing line of a distribution transformer of a power distribution network as a calculation unit, wherein the tail ends of all outgoing lines form each tail end of the power distribution network;

the following calculations are performed for each calculation unit: according to the outlet voltage U of the distribution transformer collected during the maximum load of the distribution network_maxAnd the voltage U of the end of the current computing unit_max-iCalculating the voltage loss rate DeltaU of the calculating unit at the time of maximum load_max-iPercent; based on the voltage loss rate DeltaU_max-i% Power loss Rate Δ P at maximum load_max-iPercent; based on the power loss ratio Δ P_max-i% calculating the electric energy loss rate Delta A of the current calculation unit_iPercent, and further calculating daily loss electric energy delta A of the current calculating unit_i；

According to the daily loss electric energy Delta A of each calculation unit_iAnd counting to obtain the total station area loss delta A corresponding to the distribution transformer as the theoretical line loss value.

9. The system of claim 8,

voltage loss rate Δ U_max-i% is calculated based on the following calculation:

power loss ratio Δ P_max-i% is calculated based on the following calculation:

ΔP_max-i％＝K_P*ΔU_max-i％；

electric energy loss rate Delta A of the ith calculation unit_i% is calculated based on the following calculation:

the daily power loss Delta A of the ith computing unit_iCalculated based on the following calculation formula:

ΔA_i＝A_i·ΔA_i％；

the total loss Δ a of the distribution room is calculated based on the following calculation formula:

in the above formula: k_PObtained by looking up a table according to the wire number and the power factor, or according to a calculation formula Obtaining x represents the reactance of the lead and has the unit of omega; r represents the wire resistance with the unit of omega; phi denotes the phase angle between current and voltage, F denotes the load factor, F denotes the loss factor, A_iAnd the power supply amount of the outgoing line corresponding to the ith calculation unit is shown.

10. The system of claim 6, wherein the integrated device comprises a line loss theoretical value checking unit, configured to analyze whether the line loss theoretical value is within a range determined by a normal line loss threshold, and if the analysis is passed, determine that the line loss theoretical value checking is not passed.

Technical Field

The invention relates to the technical field of power distribution, in particular to a method and a system for checking line loss of a power distribution network.

Background

The line loss theoretical calculation is an important technical management means for reducing loss, saving energy and enhancing line loss management, the distribution rule of electric energy loss in a power grid can be found through theoretical calculation, management and technical problems can be exposed through calculation and analysis, theoretical and technical bases are provided for the loss reduction work, the loss reduction work can be focused, the energy-saving and loss-reducing benefits are improved, and the line loss management is more scientific.

Disclosure of Invention

The present invention provides a method and a system for checking the line loss of a power distribution network, aiming at the above-mentioned needs in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a power distribution network line loss calibration method is constructed, and the method comprises the following steps:

the method comprises the steps that comprehensive equipment arranged on the secondary side of a distribution transformer of the power distribution network collects operation data of the secondary side of the distribution transformer and synchronously obtains operation data of tail ends collected by tail end collecting equipment arranged at each tail end of the power distribution network;

verifying the operation data collected by the comprehensive equipment and the tail end collecting equipment from multiple dimensions;

calculating a line loss theoretical value according to the collected operation data after the verification is qualified;

and checking whether the line loss theoretical value is qualified or not.

In the method of the present invention, the verifying the operation data collected by the integration device and the end collecting device from a plurality of dimensions includes:

analyzing whether the currently acquired operation data is in a range determined by an upper limit value and a lower limit value of the operation data corresponding to the distribution transformer;

analyzing whether the currently collected operation data conforms to the variation trend of the historical operation data acquired by the comprehensive equipment;

analyzing whether the currently collected operation data and the historical operation data at the same time are in a reasonable fluctuation range;

if the three analyses are passed, judging that the currently acquired operation data passes the verification, otherwise, judging that the currently acquired operation data has errors, and not passing the verification of the operation data.

In the method of the present invention, the calculating a theoretical line loss value according to the collected operation data includes:

taking each outgoing line of a distribution transformer of a power distribution network as a calculation unit, wherein the tail ends of all outgoing lines form each tail end of the power distribution network;

the following calculations are performed for each calculation unit: according to the outlet voltage U of the distribution transformer collected during the maximum load of the distribution network_maxAnd the voltage U 'of the end of the current calculation unit'_max-iCalculating the voltage loss rate DeltaU of the calculating unit at the time of maximum load_max-iPercent; based on the voltage loss rate DeltaU_max-i% Power loss Rate Δ P at maximum load_max-iPercent; based on the power loss ratio Δ P_max-i% calculating the electric energy loss rate Delta A of the current calculation unit_iPercent, and further calculating daily loss electric energy delta A of the current calculating unit_i；

According to the daily loss electric energy Delta A of each calculation unit_iAnd counting to obtain the total station area loss delta A corresponding to the distribution transformer as the theoretical line loss value.

Wherein the voltage loss rate DeltaU_max-i% is calculated based on the following calculation:

power loss ratio Δ P_max-i% is calculated based on the following calculation:

ΔP_max-i％＝K_P*ΔU_max-i％；

electric energy loss rate Delta A of the ith calculation unit_i% is calculated based on the following calculation:

the daily power loss Delta A of the ith computing unit_iCalculated based on the following calculation formula:

ΔA_i＝A_i·ΔA_i％；

the total loss Δ a of the distribution room is calculated based on the following calculation formula:

in the above formula: k_PObtained by looking up a table according to the wire number and the power factor, or according to a calculation formula

Obtained, x represents the reactance of the wire, R represents the resistance of the wire, phi represents the phase angle between the current and the voltage, F represents the load factor, F represents the loss factor, A_iAnd the power supply amount of the outgoing line corresponding to the ith calculation unit is shown.

In the method of the present invention, the verifying whether the line loss theoretical value is qualified includes: and analyzing whether the line loss theoretical value is in a range determined by a normal line loss threshold value, and if the line loss theoretical value passes the analysis, judging that the line loss theoretical value is not verified.

The invention also discloses a system for checking the line loss of the power distribution network, which comprises the following components:

the terminal acquisition equipment is arranged at each terminal of the power distribution network and used for acquiring operation data of the terminal;

the comprehensive equipment is installed at the distribution transformer secondary side of distribution network for gather the operational data of distribution transformer secondary side, and the terminal operational data that each terminal acquisition equipment gathered is acquireed in step, carry out the check-up to the operational data that comprehensive equipment and terminal acquisition equipment gathered from a plurality of dimensions, calculate line loss theoretical value according to the operational data that gathers after the check-up is qualified, the check-up whether line loss theoretical value is qualified.

In the system of the present invention, the integration apparatus includes an operation data verification unit configured to:

analyzing whether the currently acquired operation data is in a range determined by an upper limit value and a lower limit value of the operation data corresponding to the distribution transformer;

analyzing whether the currently collected operation data conforms to the variation trend of the historical operation data acquired by the comprehensive equipment;

analyzing whether the currently collected operation data and the historical operation data at the same time are in a reasonable fluctuation range;

if the three analyses are passed, judging that the currently acquired operation data passes the verification, otherwise, judging that the currently acquired operation data has errors, and not passing the verification of the operation data.

In the system of the present invention, the integrated device includes a line loss theoretical value calculation unit configured to:

taking each outgoing line of a distribution transformer of a power distribution network as a calculation unit, wherein the tail ends of all outgoing lines form each tail end of the power distribution network;

the following calculations are performed for each calculation unit: according to the outlet voltage U of the distribution transformer collected during the maximum load of the distribution network_maxAnd the voltage U 'of the end of the current calculation unit'_max-iCalculating the voltage loss rate DeltaU of the calculating unit at the time of maximum load_max-iPercent; based on the voltage loss rate DeltaU_max-i% Power loss Rate Δ P at maximum load_max-iPercent; based on thePower loss ratio Δ P_max-i% calculating the electric energy loss rate Delta A of the current calculation unit_iPercent, and further calculating daily loss electric energy delta A of the current calculating unit_i；

According to the daily loss electric energy Delta A of each calculation unit_iAnd counting to obtain the total station area loss delta A corresponding to the distribution transformer as the theoretical line loss value.

Wherein the voltage loss rate DeltaU_max-i% is calculated based on the following calculation:

power loss ratio Δ P_max-i% is calculated based on the following calculation:

ΔP_max-i％＝K_P*ΔU_max-i％；

electric energy loss rate Delta A of the ith calculation unit_i% is calculated based on the following calculation:

the daily power loss Delta A of the ith computing unit_iCalculated based on the following calculation formula:

ΔA_i＝A_i·ΔA_i％；

the total loss Δ a of the distribution room is calculated based on the following calculation formula:

in the above formula: k_PObtained by looking up a table according to the wire number and the power factor, or according to a calculation formula

Obtained, x represents the wire reactance in units ofOmega; r represents the wire resistance with the unit of omega; phi denotes the phase angle between current and voltage, F denotes the load factor, F denotes the loss factor, A_iAnd the power supply amount of the outgoing line corresponding to the ith calculation unit is shown.

In the system of the present invention, the integrated device includes a line loss theoretical value verification unit, configured to analyze whether the line loss theoretical value is within a range determined by a normal line loss threshold, and if the line loss theoretical value passes the analysis, determine that the line loss theoretical value verification does not pass.

The method and the system for verifying the line loss of the power distribution network have the following beneficial effects: the invention utilizes the comprehensive equipment arranged on the secondary side of the distribution transformer of the distribution network to acquire the operation data of the secondary side of the distribution transformer and synchronously acquire the operation data of the tail ends acquired by each tail end acquisition equipment arranged at each tail end of the distribution network, before the line loss theoretical value is calculated, the operation data acquired by the comprehensive equipment and the tail end acquisition equipment are firstly checked from multiple dimensions, after the line loss theoretical value is checked to be qualified, the line loss theoretical value is calculated according to the acquired operation data, and finally whether the line loss theoretical value is qualified is checked.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:

fig. 1 is a schematic structural diagram of a power distribution network line loss verification system of the invention;

fig. 2 is a flow chart of the power distribution network line loss verification method of the invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The general idea of the invention is as follows: acquiring operation data of the secondary side of a distribution transformer by using comprehensive equipment arranged on the secondary side of the distribution transformer of the distribution network, and synchronously acquiring operation data of tail ends acquired by each tail end acquisition equipment arranged at each tail end of the distribution network; and verifying the operation data acquired by the comprehensive equipment from the multiple dimensions and the tail end acquisition equipment, calculating a line loss theoretical value according to the acquired operation data after the verification is qualified, and verifying whether the line loss theoretical value is qualified or not.

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features of the embodiments and examples of the present invention may be combined with each other without conflict.

Referring to fig. 1, the system for verifying the line loss of the power distribution network of the present invention includes: at least one terminal acquisition device 101 and an integration device 102.

In this embodiment, the terminal acquisition device 101 and the integrated device 102 perform data transmission in a wireless communication manner. The terminal acquisition device 101 mainly completes acquisition of terminal electricity consumption data and transmits the data to the integrated device 102 through a built-in reliable wireless module. The integrated device 102 receives data sent by the terminal acquisition device through a built-in reliable wireless communication module, and performs real-time theoretical line loss calculation and measurement according to the input parameters and the measured current and voltage signals.

Specifically, at least one terminal acquisition device 101 is installed at each terminal of the power distribution network, specifically, one terminal acquisition device 101 is installed at each terminal, and the terminal acquisition devices 101 are used for acquiring operation data of the terminal where the terminal acquisition devices 101 are located. The distribution network may include a main line led out from the secondary side of the distribution transformer and branch lines led out from the main line, and the branch lines may be further connected to a plurality of branch lines. The term "termination" as used herein refers to the termination of all outgoing lines (including the main line and all the branches) from the secondary side of the distribution transformer. That is, the end-point acquisition device 101 is located at the load representative point at the end of the platform. The voltage, current, power factor of the load representative center can be introduced into the end collection device 101 data channel through a voltage clamp and a clamp transformer.

Specifically, the integrated device 102 is installed on the secondary side of the distribution transformer of the distribution network, and is used for acquiring operation data of the secondary side of the distribution transformer, synchronously acquiring operation data of the tail ends acquired by each tail end acquisition device, checking the operation data acquired by the integrated device and the tail end acquisition devices from multiple dimensions, calculating a line loss theoretical value according to the acquired operation data after the checking is qualified, and checking whether the line loss theoretical value is qualified or not.

According to the invention, when the power distribution network is initially restored to supply power or a manual starting instruction is received, the corresponding relation between the terminal acquisition equipment 101 and the comprehensive equipment 102 is established in a reliable wireless communication mode, the time period for establishing the corresponding relation is called a registration stage, after the registration is successful, the comprehensive equipment 102 issues an instruction to the line loss terminal acquisition equipment 101, all the terminal acquisition equipment 101 is shifted to a real-time data acquisition stage, the data sampling frequency is once per second, and the time marks of the terminal acquisition equipment are required to be consistent. After data acquisition of the terminal acquisition equipment 101, the data is stored in a local memory, then the data of the terminal acquisition equipment 101 is transmitted to the comprehensive equipment 102 through a power line wireless communication technology, and the comprehensive equipment 102 performs high-density localized mass data operation analysis by combining the data of the terminal acquisition equipment 101 and the data of the comprehensive equipment 102, so that the problem of large calculation workload of a line loss theory is solved.

More specifically, the integrated device 102 includes an acquisition module, a communication module, and a processing module.

And the acquisition module is used for acquiring the operation data of the secondary side of the distribution transformer, such as voltage, current and the like.

And the wireless communication module is used for carrying out wireless data communication with the terminal acquisition equipment and synchronously acquiring the terminal operation data acquired by each terminal acquisition equipment, such as voltage, current and the like.

The processing module comprises an operation data checking unit, a line loss theoretical value calculating unit and a line loss processing checking unit, wherein:

the operation data checking unit is used for:

1) analyzing whether the currently acquired operation data are in a range determined by an upper limit value and a lower limit value of the operation data corresponding to the distribution transformer, for example, the voltage and the current have preset reasonable upper limit values and lower limit values;

2) whether the currently collected operation data accords with the change trend of historical operation data acquired by the comprehensive equipment or not is analyzed, the historical operation data refers to data which are collected on the same day, for example, the next trend can be estimated according to the historical operation data, and if the data are seriously deviated from the trend of the historical operation data, the data can be considered to be abnormal.

3) Whether the currently collected operation data and the operation data of the same historical time are in a reasonable fluctuation range or not is analyzed, and the same historical time refers to the same time of the non-current day. For example, the operation data collected at 12 points today is compared with the operation data collected at 12 points yesterday.

4) If the three analyses are passed, judging that the currently acquired operation data passes the verification, otherwise, judging that the currently acquired operation data has errors, and not passing the verification of the operation data.

And the line loss theoretical value verifying unit is used for analyzing whether the line loss theoretical value is in a range determined by a normal line loss threshold value, and if the line loss theoretical value passes the analysis, judging that the line loss theoretical value is not verified.

A line loss theoretical value calculation unit for: taking each outgoing line of a distribution transformer of a power distribution network as a calculation unit, wherein the tail ends of all outgoing lines form each tail end of the power distribution network; the following calculations are performed for each calculation unit: according to the outlet voltage U of the distribution transformer collected during the maximum load of the distribution network_maxAnd the voltage U 'of the end of the current calculation unit'_max-iCalculating the voltage loss rate DeltaU of the calculating unit at the time of maximum load_max-iPercent; based on the voltage loss rate DeltaU_max-i% Power loss Rate Δ P at maximum load_max-iPercent; based on the power loss ratio Δ P_max-i% calculating the electric energy loss rate Delta A of the current calculation unit_iPercent, and further calculating daily loss electric energy delta A of the current calculating unit_i(ii) a According to the daily loss electric energy Delta A of each calculation unit_iAnd counting to obtain the total station area loss delta A corresponding to the distribution transformer as the theoretical line loss value.

Wherein the voltage loss rate DeltaU_max-i% is calculated based on the following calculation:

wherein the power loss ratio Δ P_max-i% is calculated based on the following calculation:

ΔP_max-i％＝K_P*ΔU_max-i％；

wherein, the electric energy loss rate Delta A of the ith calculation unit_i% is calculated based on the following calculation:

wherein the daily loss electric energy Delta A of the ith calculation unit_iCalculated based on the following calculation formula:

ΔA_i＝A_i·ΔA_i％；

wherein, the total loss Delta A of the transformer area is calculated based on the following calculation formula:

in the above formula: k_PObtained by looking up a table according to the wire number and the power factor, or according to a calculation formula

Obtaining that x represents the reactance of the wire; r represents a wire resistance; phi represents the phase angle between the current and the voltage; f represents the load rate, and each unit is determined according to the actual situation; f represents a loss factor; a. the_iAnd the power supply amount of the outgoing line corresponding to the ith calculation unit is shown. It should be noted that, if the transformer has multiple outgoing lines, the power supply amount A of each outgoing line_iThe power supply amount of the transformer is divided according to the current of each path of outgoing line.

Referring to fig. 2, based on the same inventive concept, the invention also discloses a power distribution network line loss calibration method, which includes:

s201, collecting operation data of a secondary side of a distribution transformer by comprehensive equipment arranged on the secondary side of the distribution transformer of the power distribution network, and synchronously obtaining operation data of tail ends collected by tail end collecting equipment arranged at each tail end of the power distribution network;

s202, verifying the operation data acquired by the comprehensive equipment and the terminal acquisition equipment from multiple dimensions;

s203, calculating a line loss theoretical value according to the collected operation data after the verification is qualified;

and S204, checking whether the line loss theoretical value is qualified.

Wherein, the step S202 of verifying the operation data collected by the integrated device and the terminal collecting device from multiple dimensions includes:

s2021, analyzing whether the currently acquired operation data are in a range determined by an upper limit value and a lower limit value of the operation data corresponding to the distribution transformer, for example, the voltage and the current have preset reasonable upper limit values and lower limit values;

s2022, analyzing whether the currently collected operation data conforms to a variation trend of the historical operation data acquired by the integrated device, where the historical operation data refers to data already collected on the same day, for example, a next trend may be estimated according to the historical operation data, and if the data is seriously deviated from the trend of the historical operation data, the data may be considered to be abnormal.

S2023, analyzing whether the currently collected operation data and the operation data at the same historical time are in a reasonable fluctuation range, wherein the same historical time is the same time on the non-current day. For example, the operation data collected at 12 points today is compared with the operation data collected at 12 points yesterday.

And S2024, if the three analyses are passed, judging that the currently acquired operation data passes verification, otherwise, judging that the currently acquired operation data has errors, and not passing verification of the operation data.

Wherein, the calculating the line loss theoretical value according to the collected operation data in step S203 includes:

s2031, taking each outgoing line of a distribution transformer of a power distribution network as a calculation unit, wherein the tail ends of all outgoing lines form each tail end of the power distribution network;

s2032, the following calculation is performed for each calculation unit: according to the outlet voltage U of the distribution transformer collected during the maximum load of the distribution network_maxAnd the voltage U 'of the end of the current calculation unit'_max-iCalculating the voltage loss rate DeltaU of the calculating unit at the time of maximum load_max-iPercent; based on the voltage loss rate DeltaU_max-i% Power loss Rate Δ P at maximum load_max-iPercent; based on the power loss ratio Δ P_max-i% calculating the electric energy loss rate Delta A of the current calculation unit_iPercent, and further calculating daily loss electric energy delta A of the current calculating unit_i；

Specifically, the method comprises the following steps:

voltage loss rate Δ U_max-i% is calculated based on the following calculation:

power loss ratio Δ P_max-i% is calculated based on the following calculation:

ΔP_max-i％＝K_P*ΔU_max-i％；

electric energy loss rate Delta A of the ith calculation unit_i% is calculated based on the following calculation:

the daily power loss Delta A of the ith computing unit_iCalculated based on the following calculation formula:

ΔA_i＝A_i·ΔA_i％；

the total loss Δ a of the distribution room is calculated based on the following calculation formula:

in the above formula: k_PObtained by looking up a table according to the wire number and the power factor, or according to a calculation formula

Obtaining that x represents the reactance of the wire; r represents a wire resistance; phi represents the phase angle between the current and the voltage; f represents the load rate, and each unit is determined according to the actual situation; f represents a loss factor; a. the_iAnd the power supply amount of the outgoing line corresponding to the ith calculation unit is shown. It should be noted that, if the transformer has multiple outgoing lines, the power supply amount A of each outgoing line_iThe power supply amount of the transformer is divided according to the current of each path of outgoing line.

S2033, calculating daily power consumption delta A of each calculation unit_iAnd counting to obtain the total loss delta of the distribution transformer corresponding to the distribution transformerAnd A is taken as the theoretical line loss value.

The step S204 of verifying whether the line loss theoretical value is qualified includes: and analyzing whether the line loss theoretical value is in a range determined by a normal line loss threshold value, and if the line loss theoretical value passes the analysis, judging that the line loss theoretical value is not verified.

For further details, reference may be made to the system embodiment section, which is not described herein.

In summary, the method and the system for verifying the line loss of the power distribution network have the following beneficial effects: the method comprises the steps of acquiring operation data of the secondary side of the distribution transformer by utilizing comprehensive equipment arranged on the secondary side of the distribution transformer of the power distribution network, synchronously acquiring operation data of tail ends acquired by each tail end acquisition equipment arranged at each tail end of the power distribution network, checking the operation data acquired by the comprehensive equipment and the tail end acquisition equipment from multiple dimensions before calculating a line loss theoretical value, calculating the line loss theoretical value according to the acquired operation data after the line loss theoretical value is checked to be qualified, and finally checking whether the line loss theoretical value is qualified.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.